Application of High Temperature Heat Pump in Electroplating Plant Thermostat

Application of High Temperature Heat Pump in Electroplating Bath Thermostat I. Present Situation of Electroplating Factory 1. The electroplating factory now heats the cleaning solution of electroplating solution and parts, accounting for 20% -30% of the electroplating factory's total electricity. 2. Now electroplating heating methods are the following: A, small factories generally take electric heating B, medium-sized factories generally take boiler heating C, large enterprises generally use steam heating 3. After plating parts drying generally take electric heating Drying boxes, oil drying lines or steam drying lines. Second, Yong Gan high-temperature heat pump solutions: 1, the use of high-temperature air source heat pump, on the one hand to provide high temperature hot water 80 ℃ ~ 85 ℃, on the other hand heat pump exhaust can be introduced into the workshop for the workshop to provide fresh cold air, Workshop ambient temperature, improve the working environment of employees. 2, after plating parts can be high temperature air source heat pump for drying, parts drying at low temperature will not cause some plastic parts deformation and aging, to avoid damage to the product. 3, using high-temperature heat pump technology can reduce the plating costs per unit of product. Relatively calculated, the operating cost is electric heating 1/4, 1/3 of the cost of fuel, while improving the safety of production. High-temperature heat pump can effectively provide high-temperature hot water at 85 ℃ plating bath for the daily bath insulation, high-temperature heat pump exhaust outlet temperature stability at 20 ℃ -25 ℃, the exhaust recovery, the introduction of the workshop, the workshop can provide fresh Of the air-conditioning, lower workshop temperature, improve the workshop air quality, enhance the working environment. After plating parts can also use high temperature air source heat pump dehydration drying. The use of high-temperature heat pump technology can reduce the cost of electroplating, electrical heating is about a quarter of the cost of heating the equivalent of 1/3 the cost of fuel.

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Cleaning cycle system in the high-pressure pump and nozzle selection

The choice of high-pressure pump Because the pressure of the cleaning system working pressure provided by the high-pressure water pump, jet and Other jet components have been standardized, the choice of cleaning pressure with the pump rated pressure close together. In ensuring the cleaning pressure at the same time, in order to increase the pump power utilization, the cleaning system is usually set slightly lower than the rated pressure of high pressure pump and rated flow level. Taking into account system pressure drop losses and system flow such as pipe loss, an alternative high pressure water pump is identified within the pressure selection range and the alternative cleaning pressure is determined. Considering the cost of equipment, cleaning efficiency, cleaning speed and other related factors, combined with relevant cleaning systems at home and abroad, the ultimate choice of cleaning pressure and high pressure water pump models. In theory, the high pressure pump rated pressure, converted to dynamic pressure and jet speed is also large, striking power is also large, the better the cleaning effect. However, as mentioned earlier, the dynamic pressure and dirt damage intensity related to the dynamic pressure reaches a certain value, and then increase the rated pressure of the pump, the cleaning effect is very small progress. We can see that for the continuous cleaning unit speed, want to get a good cleaning effect mainly by increasing the flow to solve. In general, the rated pressure of high-pressure pump election 7 ~ l0MP. Flow 8 ~ 10m3 / h nozzle selection nozzle diameter is determined by the flow rate, for the aluminum strip to be cleaned, because the board is wider, but also to select the appropriate jet angle and the number of nozzles. The general choice of pressure 2 ~ 275MPa liquid spray fan nozzle, spray angle 250,40 pseudo-appropriate. The size of the nozzle diameter d determines the size of the flow rate, so the nozzle can be selected according to the required flow rate. Nozzle placement The ideal angle of incidence of cleaning is a relatively independent parameter, determined by the material properties of the cleaning object, without affecting other parameter choices, and should be determined first. For the cleaning of rolling oil and soft aluminum viscous soft scales, water jet shear force plays a significant role, the use of a larger angle of incidence, increase shear, in order to facilitate cleaning. Therefore, the high pressure washer nozzle designed to be movable and rotatable form, easy to adjust the jet nozzle interval to make it in the basic section, while the nozzle angle of incidence adjustable, in order to achieve the best possible impact, improve the aluminum Material cleaning effect. In general, the direction of the jet and the surface to be cleaned into 75 sheets. A Best effect. 4 Conclusion Through the theoretical analysis of the high-pressure water jet striking force, that the choice of appropriate pump pressure and flow, in order to achieve the best impact, get a good cleaning effect. In general, the rated pressure of high-pressure pump is 7 ~ 10MPa. Flow 8 ~ 10m3 / h. Select the number of nozzles and jet angle according to the width of the board. Spout angle of 40 to 250 degrees is appropriate, the direction of the jet and the cleaning strip surface into the 75 to 83 degrees best. In order to improve the quality of cleaning, brushing roller device can be added to the pressure washer, and washed with hot water at 60 ~ 70 ℃, dried after cleaning. (Cleaning cycle system high pressure pump and nozzle selection)

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Chinese scientists developed a "blink" switch appliances sensor

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Imagine winking, lights on, winking, lights off ... Chinese scientists recently reported the design of a new type of sensor that can be attached to the glasses to detect blinking movements so that the "blinking" switch between the home Electrical and other daily tasks become a reality.


"The technology can be considered as having a 'third hand.'" Professor Hu Chenguo, one of the study leaders, told Xinhua News Agency reporters. She said that if the normal person's hands are occupied, this new type of human-computer interaction can be used to control the nearby electronic devices. Patients who have lost their mobility due to diseases such as dementia can also benefit from this. In the future, Sensors installed in different parts of the human body, try to manipulate the intelligent robot.


In addition to Hu Chenguo, Pu Xianjie of Chongqing University, Guo Hengyu and Beijing Institute of Nano Energy, Chinese Academy of Sciences Professor Wang Zhonglin and others involved in the study, the paper published in the new issue of the United States, "Science Progress" magazine.


According to Hu Chenguo introduction, the traditional human-computer interaction system in the detection of blinking movements, the main probe is very faint body surface bioelectric signals, and they use the recent hot friction nano-power generation technology to design a new sensor to detect the blink of an eye Caused by the skin near the temple movement, not only the high sensitivity, and compared to the traditional detection methods also have better durability and stability.


She explained that the sensor consists of two layers of film, with a certain distance in between. Sensor installed in the glasses legs, contact the skin near the corner of the eye. When the eyes blink, the skin around the corner of the eye to produce a small movement, will make contact with the two films; blink after the eyes open, the two films will be separated. The back of the film prepared by a conductive layer, you can produce a blink of the pulse corresponding to the electrical signal output.


Test results show that the pulse of the output signal strength and the blink of an eye has a direct relationship between the strength and speed. Compared with conscious blinking, unconscious blinking is relatively minor, the pulse signal intensity is small, so the two are easier to distinguish.


In addition to controlling the switch of the electronic device by blinking, the design can also input on the virtual typing interactive interface, for example, type English words and space symbols to form a sentence. Due to the extremely high sensitivity and stability of the sensor, the accuracy of these tasks is high.


Hu Chenguo said he plans to further improve the blink input method system in the future so as to input arbitrary sentences in this way, including switching between Chinese and English, input numbers and punctuation marks, and can also automatically associate commonly used phrases with the input method, just like the present People can do that on ordinary computer keyboards. In addition, researchers also hope to achieve more complex applications such as remote-controlled smart devices through a combination of two blinks.


Hu Chenguo pointed out that sensory-controlled human-computer interaction can create new ways of natural communication between people and external devices and improve people's quality of life. This work "makes the control of electronic devices by blinking promising from experiments Room to our daily life. "


The original title: Chinese scientists developed a "blink" switch appliances sensor

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Chinese scientists developed a "blink" switch appliances sensor

Network with map

Imagine winking, lights on, winking, lights off ... Chinese scientists recently reported the design of a new type of sensor that can be attached to the glasses to detect blinking movements so that the "blinking" switch between the home Electrical and other daily tasks become a reality.


"The technology can be considered as having a 'third hand.'" Professor Hu Chenguo, one of the study leaders, told Xinhua News Agency reporters. She said that if the normal person's hands are occupied, this new type of human-computer interaction can be used to control the nearby electronic devices. Patients who have lost their mobility due to diseases such as dementia can also benefit from this. In the future, Sensors installed in different parts of the human body, try to manipulate the intelligent robot.


In addition to Hu Chenguo, Pu Xianjie of Chongqing University, Guo Hengyu and Beijing Institute of Nano Energy, Chinese Academy of Sciences Professor Wang Zhonglin and others involved in the study, the paper published in the new issue of the United States, "Science Progress" magazine.


According to Hu Chenguo introduction, the traditional human-computer interaction system in the detection of blinking movements, the main probe is very faint body surface bioelectric signals, and they use the recent hot friction nano-power generation technology to design a new sensor to detect the blink of an eye Caused by the skin near the temple movement, not only the high sensitivity, and compared to the traditional detection methods also have better durability and stability.


She explained that the sensor consists of two layers of film, with a certain distance in between. Sensor installed in the glasses legs, contact the skin near the corner of the eye. When the eyes blink, the skin around the corner of the eye to produce a small movement, will make contact with the two films; blink after the eyes open, the two films will be separated. The back of the film prepared by a conductive layer, you can produce a blink of the pulse corresponding to the electrical signal output.


Test results show that the pulse of the output signal strength and the blink of an eye has a direct relationship between the strength and speed. Compared with conscious blinking, unconscious blinking is relatively minor, the pulse signal intensity is small, so the two are easier to distinguish.


In addition to controlling the switch of the electronic device by blinking, the design can also input on the virtual typing interactive interface, for example, type English words and space symbols to form a sentence. Due to the extremely high sensitivity and stability of the sensor, the accuracy of these tasks is high.


Hu Chenguo said he plans to further improve the blink input method system in the future so as to input arbitrary sentences in this way, including switching between Chinese and English, input numbers and punctuation marks, and can also automatically associate commonly used phrases with the input method, just like the present People can do that on ordinary computer keyboards. In addition, researchers also hope to achieve more complex applications such as remote-controlled smart devices through a combination of two blinks.


Hu Chenguo pointed out that sensory-controlled human-computer interaction can create new ways of natural communication between people and external devices and improve people's quality of life. This work "makes the control of electronic devices by blinking promising from experiments Room to our daily life. "


The original title: Chinese scientists developed a "blink" switch appliances sensor

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What is a gear pump

Gear pump is a kind of positive displacement pump, which consists of two gears, the pump body and the front and the back cover. When the gear rotates, the volume of the space on the side of gear disengagement increases from small to large to form a vacuum, The volume of the space on the engagement side is reduced from large to large, and the liquid is squeezed into the pipe. The suction chamber and the discharge chamber are separated by the meshing line of two gears. The pressure at the outlet of the gear pump depends entirely on the resistance of the pump.

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British innovation test seaweed pond phosphorus removal rate of up to 96%

The latest news shows that the joint project between the University of Bath in Bath and the Wessex utility water utility is testing the algae ponds for phosphorus removal. It is reported that the experiment with high-efficiency seaweed pool system as a pilot to contaminants in wastewater as nutrients, the use of seaweed to be absorbed and transformed before the wastewater discharge and then recycle. Experimental results show that this method can remove more than 80% of phosphorus while removing nutrients.

Algae pools are used to remove nutrients and treat waste water at the University of Bath in the United Kingdom and the Wessex Utility Water Utility. The project's main investigation into wastewater treatment and phosphorus reduction using algae ponds is not only a growing concern for British water companies, but is also forced by WFD's environmental agency to find new solutions.

The purpose of this experiment is to use "managed eutrophication" approach. Let the wastewater release nutrients to promote the growth of algae in the river, and then remove the algae before the wastewater flows into the river. Treated wastewater can be discharged into the river, seaweed can be recycled for reuse.

To this end, an efficient seaweed pool system was installed as a pilot at the Wilkes Sewage Treatment Plant in Bayington. Nearly 3,000 liters of wastewater are treated daily, while 80-96% of the phosphorus is removed. The system consists of two shallow ponds measuring approximately 60 square meters and a volume of 18,000 liters. The sewage flows continuously with the slurry.

Efficient algae pond system will cultivate the ideal algae seed to wastewater pollutants for nutrition, or pollutants will be discharged into the environment. In each catchment, seaweed absorbs nutrients from the waste water, plus sunlight and carbon dioxide to promote its growth, thus reducing the amount of organic matter, including phosphorus, in the wastewater. A portion of the mixture of wastewater and seaweed is transferred to the sedimentation tank and separated daily, with the fresh effluent again filled with water. Treated wastewater contains small amounts of pollutants that can be released into the environment, and nutrient-rich seaweeds are reused for various purposes, such as bioplastics, biofuels and agricultural fertilizers.

The team is led by Dr. Tom Arnott, PhD, Department of Chemical Engineering and Professor Rod Scott, a professor of biological and biochemistry. Dimitrios, an assistant researcher at the Department of Biology and Chemistry at the University of Bath and a test contender at the Baquingum University, said that in theory the system can provide a good environment and a sustainable way to remove phosphorus from wastewater without spending more The water fee can improve the water environment of rivers and lakes. In this experiment, they want to establish how the technology behaves under realistic conditions, while explaining and responding to any challenge that may arise during the experiment.

The project is funded by the British Water Institute. Finally, the research team intends to make the HRAPs system a viable and cost-effective way to remove phosphorus to a lower concentration, thus benefiting water utilities and consumers.

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NB-IoT is a cellular Internet of Things technology based on the 3GPP protocol

At present, the communication between people can already be done conveniently and cheaply, and the communication between people and things is in the ascendant. In the era of the Internet of things, if you want to realize the Internet of things, the first is to choose what kind of wireless connection technology.

In the Internet of Things (IoT), wireless connectivity technologies are diverse and their strengths, future or complementarities are different for low-power wide area networks (such as NB-IoT, eMTC and LoRa) and low-power local area networks (such as Wi-Fi, Bluetooth and ZigBee) How to choose should see business needs.

Low-power WAN have their own strengths

For low-power WAN technologies, NB-IoT, eMTC and LoRa technologies are more mature technologies. Each of the three technologies has advantages and disadvantages, which can be complemented in practical application scenarios.

NB-IoT is a cellular IoT technology based on the 3GPP protocol. The bandwidth is only 200kHz and can be directly deployed in the GSM or LTE networks. Based on the licensed frequency band, NB-IoT can be deployed in-band, guard band or independent carrier to coexist with existing networks . However, the NB-IoT does not support the cell handover or redirection in the connected state, and the cell reselection can only be performed in the idle state.

NB-IoT has four major characteristics, one is wide coverage, in the same frequency band, NB-IoT than the existing GSM network gain of 20dB, equivalent to enhance the ability to cover 100 times the area; the second is the ability to support the mass connection, NB-IoT a sector can support 50000 connections; Third, lower power consumption, NB-IoT terminal module standby time up to 10 years; Fourth, low-cost, when NB-IoT module shipments over one thousand After the million, the module cost can be reduced to 5 dollars or less.

eMTC is also a cellular Internet of Things (IoT) technology with a bandwidth of 1.4MHz and up to a maximum of 1 Mbit / s peak rate for uplink and downlink. It supports richer applications such as VoLTE and supports connected cell switching. The existing network can be upgraded with 4G network software Way to achieve. However, the coverage of eMTC is 9dB worse than that of NB-IoT, which consumes more power than NB-IoT and the number of connections is low.

LoRa uses an unlicensed ISM frequency band. It has a simple network architecture and low operation cost. Its maximum coverage range is up to 20 km and data rate is up to 50 kbit / s. The module has low power consumption and low cost and can be self-organized. But LoRa is likely to cause network congestion based on unlicensed bands.

From a technical point of view, NB-IoT more suitable for meter reading and other services, eMTC more suitable for people to communicate, and LoRa based on unlicensed band, more suitable for ad hoc network. In the future, enterprises can choose the appropriate technology according to the application scenario.

Low-power LAN have their advantages

In low-power LAN, Wi-Fi, Bluetooth, ZigBee is a more mature technology, more suitable for smart home environment applications.

Bluetooth is commonly used in wearable devices. Up to now, the latest transmission speed of Bluetooth 5.0 is limited to 2 Mbit / s. Theoretically, the effective working distance between Bluetooth transmitting and receiving devices can reach 300 meters. Bluetooth technology is fully supported mesh mesh network, can provide many-to-many device transmission, and especially improve the communication efficiency of building a wide range of network coverage for building automation, wireless sensor networks need tens of thousands of devices in a reliable, IoT solution for secure transport of the environment.

In terms of terminals, Bluetooth technology has the advantage of low cost. Almost a billion smartphones are produced every year with Bluetooth 4.0. Such a large volume reduces the R & D costs of Bluetooth protocols and Bluetooth hardware and software.

Based on the IEEE802.11 protocol, Wi-Fi has a maximum coverage radius of up to 100 meters and a transmission rate of 54 Mbit / s, but its power consumption is relatively high. It is suitable for large-scale and large-scale data transmission and signal coverage. Wi-Fi is high data Rate The best choice for applications that can deliver audio and video streams.

Based on the IEEE802.15.4 protocol, ZigBee can embed a variety of devices with a maximum propagation speed of 250 kbit / s and a coverage of 75 meters. Its low power consumption, low cost and self-organizing network make the protocol easy. Compared with the point-to-point transmission mode of Bluetooth, ZigBee protocol has the advantage of self-networking capability, supporting up to 65,000 devices. For smart home, ZigBee protocol security is high, so far there is no world together to crack precedent.

As can be seen from the technical features, Bluetooth is more suitable for applications in personal wearable devices and the communication between people and the surrounding objects, Wi-Fi is more suitable for large-rate transmission, and ZigBee more applications in the sensor information transmission. From this we can see that low-power WAN technologies can also be integrated with low-power LAN technologies in the future to form a complementary trend to meet more business needs.

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