Low-energy-consumption zero-emission support roller machine variable-frequency vacuum environment-friendly system

An idler, zero-emission technology, applied in the field of vacuum pumping systems, can solve the problems of reaching more than 88 decibels, increasing the cost of sewage treatment, uneven paper dehydration, etc., reducing energy consumption, solving the problems of water backflow and scaling during shutdown , the effect of improving system reliability

Pending Publication Date: 2018-02-23

CHINA UNITED NORTHWEST INST FOR ENG DESIGN & RES

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AI-Extracted Technical Summary

Problems solved by technology

The traditional roller machine vacuum device is designed as a combination of "vertical cylindrical filter + water ring vacuum pump". In use, the device has low efficiency and high energy consumption (vehicle speed 1250/min, 1 water ring vacuum pump, 185kw/set) The internal circulating water of the water ring vacuum pump is greatly affected by the ambient temperature. With the increase of the ambient temperature, the circulating water in the pump is prone to occur inside the vacuu...

Method used

The pumping speed of one-level Roots pump 8 is fast, is little affected by ambient temperature, and efficient is high, without working fluid, environmental protection and energy saving, one-level Roots pump 8 and secondary Roots pump 11 also pass electroma...

Abstract

The invention discloses a frequency conversion vacuum environmental protection system for roller machines with low energy consumption and zero discharge. The butterfly valve is divided into two paths, one path is connected to the first-stage Roots pump and the second-stage Roots pump in sequence, and the other path is connected to the second-stage Roots pump through the second pneumatic butterfly valve. Silencer for air noise. The invention can reduce the energy consumption of the original water ring pump by 40%, improve the reliability of the system, and be environmentally friendly with zero discharge; when the air volume of the idler machine increases due to the increase of the ambient temperature, it can automatically reduce the temperature of the air inlet of the pump to ensure a constant The pumping speed and vacuum degree solve the problem of water return and scaling during shutdown, and effectively reduce noise pollution.

Application Domain

Dryer section

Technology Topic

Inlet temperatureNoise pollution +7

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Examples

Experimental program(1)

Example Embodiment

[0024] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

[0025] see figure 1 , the present invention discloses a low-energy consumption and zero-emission roller machine frequency conversion vacuum environmental protection system, including: manual valve 1, pneumatic valve 2, vertical cylindrical filter 3, first pneumatic butterfly valve 4, pressure transmitter 5, pressure Table 6, check valve 7, primary Roots pump 8, second pneumatic butterfly valve 9, solenoid valve 10, secondary Roots pump 11, temperature sensor 12, muffler 13, pressure transmitter 14.

[0026] One end of the suction line is connected to the roller machine, the other end is connected to one end of the vertical cylindrical filter 3 through the manual valve 1 and the pneumatic valve 2, and the other end of the vertical cylindrical filter 3 is passed through the first pneumatic butterfly valve for 4 minutes. Two routes, one route passes through the first-stage Roots pump 8 and the second-stage Roots pump 11 to connect with the muffler 13, and the other route passes through the second pneumatic butterfly valve 9, and the second-stage Roots pump 11 is connected to the muffler 13;

[0027] Among them, the manual valve 1 is used to connect or cut off the system. The pneumatic valve 2 is used to realize the automatic start-stop linkage switch action of the system; the vertical cylindrical filter 3 is different from the ordinary vertical cylindrical filter, which is a wet vertical cylindrical filter, and is equipped with automatic liquid level control, vacuum state Automatic water release function. It is used to filter and cool down the gas containing paper dust passing through the filter cloth of the idler machine through the device in advance, and the filtered and cooled gas enters the first pneumatic butterfly valve 4 .

[0028] The first pneumatic butterfly valve 4 is used to realize the automatic start-stop linkage switch action of the system to prevent the atmospheric air from being sucked back into the system after a momentary power failure; There are pressure transmitter 5 for remote automatic control and pressure gauge 6 for on-site display of pressure value. When the temperature inside the pump is high, the spray is automatically turned on to cool down; the other path is connected to the second pneumatic butterfly valve 9, and the second pneumatic butterfly valve 9 is used to connect or cut off the connection between the secondary Roots pump 11 and the vertical cylindrical filter 3 .

[0029] The first-stage Roots pump 8 has a fast pumping speed, is little affected by the ambient temperature, has high efficiency, does not need working fluid, and is environmentally friendly and energy-saving. The valve 10 is used to connect or cut off the cooling water pipeline between the first-stage Roots pump 8 and the second-stage Roots pump 11; To reduce back pressure and save energy.

[0030] A temperature sensor 12 is installed between the secondary Roots pump 11 and the muffler 13. The temperature sensor 12 is used to measure the exhaust port temperature of the secondary Roots pump 11. It is linked with the one-way valve 7 and can protect the entire device. The muffler 13 is used to reduce the exhaust noise of the complete set of equipment; the other end of the muffler 13 is provided with a pressure transmitter 14, and the pressure transmitter 14 is used to measure the exhaust pressure. When the pressure exceeds the set value, it will alarm or prompt to replace the muffler Device 13.

[0031] see figure 2 , the operation steps of the frequency conversion vacuum environmental protection system of the low-energy consumption and zero-emission idler roller machine of the present invention are as follows:

[0032] S1. Adjust the temperature and pressure on the external panel of the device, and set the required process parameters;

[0033] S2, open the manual valve, and issue the start command of the unit;

[0034] S3, the first pneumatic butterfly valve, the second pneumatic butterfly valve and the electromagnetic valve are respectively opened;

[0035] S4, the primary Roots pump and the secondary Roots pump start.

[0036] When the air volume is too small, check whether the vertical cylindrical filter is blocked; check the exhaust pressure through the pressure transmitter; check the exhaust temperature through the temperature sensor and check whether there is any air leakage at each connection.

[0037] When the temperature of the pump cavity exceeds 55°C, check the temperature of the air inlet, check the pressure of the exhaust through the pressure transmitter; check the one-way valve; stop the pump and check the internal dead point of the pump, if there is, disassemble the frequency conversion zero-emission vacuum device to clean up, if there is a fault Continue running after exclusion.

[0038] The above content is only to illustrate the technical ideas of the present invention, and cannot limit the protection scope of the present invention. Any changes made on the basis of the technical solutions according to the technical ideas proposed in the present invention shall fall within the scope of the claims of the present invention. within the scope of protection.

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Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

Reduce energy consumption
Improve system reliability

Low-energy-consumption zero-emission support roller machine variable-frequency vacuum environment-friendly system

AI-Extracted Technical Summary

Problems solved by technology

Method used

Abstract

Image

Examples

Example Embodiment

PUM

Description & Claims & Application Information

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