CN212792393U

CN212792393U - Gas phase extraction automatic control device for well point dewatering

Info

Publication number: CN212792393U
Application number: CN202021182477.3U
Authority: CN
Inventors: 陈恺; 徐婉珍; 李忠博; 韩慧慧; 蔡梅; 朱彤彤; 徐年; 孙硕; 杨丹丹; 申远
Original assignee: Zhongke Dingshi Environmental Engineering Co ltd
Current assignee: Zhongke Dingshi Environmental Engineering Co ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-03-26
Anticipated expiration: 2030-06-23

Abstract

The utility model relates to a vapor extraction automatic control device who is used for well point dewatering concurrently, its characterized in that: the inside pipe is located to the outer pipe box, the top and the outer pipe pipeline intercommunication of outer tube, the outer pipe pipeline passes through draught fan and tail gas processing unit intercommunication, and the air feed is extracted mutually, the top and the inner tube pipeline intercommunication of inner tube, the inner tube pipeline passes through vacuum pump and water processing unit intercommunication, extracts groundwater and control water level, inner tube bottom outer wall is equipped with level probe to through cable and PLC the control unit signal connection, PLC the control unit passes through the operation that the system was extracted to response signal control gaseous phase and precipitation, the utility model discloses in having the normal position thermal desorption of strict demand, gaseous phase extraction place restoration to control water level, can regard as main or supplementary water level control measure, be favorable to reinforcing restoration effect, reduce the restoration cost.

Description

Gas phase extraction automatic control device for well point dewatering

Technical Field

The utility model relates to a vapor extraction automatic control device that is used for well point precipitation concurrently.

Background

The vapor extraction technology is an economic restoration method in the field of restoration of polluted sites, and has a good effect of removing VOCs pollutants. Meanwhile, in the heat conduction and thermal desorption technology of in-situ thermal desorption, vapor extraction is a very important part.

In the in-situ thermal desorption remediation, the technical principle is that soil is heated to rise, pollutants are gradually desorbed from soil particles, and the pollutants are removed by extraction through an extraction well. Because the specific heat and the evaporation enthalpy of water are higher, the integral thermal desorption effect and the energy use condition are greatly influenced by the underground water condition and the soil water content.

Generally speaking, in the in-situ thermal desorption, the underground water level should be lower than the depth of the target heating soil body, and simultaneously should be lower than the depths of the heating well and the bottom of the extraction well, so that the target heating soil body is in a lower water content state, thereby not only ensuring the restoration effect, but also saving the energy consumption. Meanwhile, after the water level rises to a certain degree, a large amount of water vapor and liquid water enter the extraction pipe, and the tail gas treatment unit is often required to have enough gas-liquid separation capacity or increase the treatment capacity of other links so as to ensure the tail gas treatment effect, so that the repair cost is greatly increased.

In the actual implementation of in-situ thermal desorption, although measures for intercepting and reducing water are taken for regions with abundant underground water, the underground water level may still rise to the depth range of pollution due to the concealment and complexity of underground conditions, so that the remediation effect is influenced, and the energy consumption and the remediation cost are greatly increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a vapor extraction automatic control device who is used for well point precipitation concurrently makes vapor extraction automatic control device can be used for water level monitoring and well point precipitation concurrently, and the condition to different places is as main or supplementary water level control measure, is favorable to promoting the restoration effect, reduces energy consumption and repair cost.

In order to realize the purpose, the utility model discloses a technical scheme is:

a vapor extraction automatic control device also used for well point dewatering is characterized in that: the outer pipe box is located the interior outside of pipe, the top and the outer pipe pipeline intercommunication of outer tube, the outer pipe pipeline passes through draught fan and tail gas processing unit intercommunication, and the air feed is extracted mutually, the top and the inner tube pipeline intercommunication of inner tube, the inner tube pipeline passes through vacuum pump and water processing unit intercommunication, extracts groundwater and control water level, inner tube bottom outer wall department is equipped with level probe to through cable and PLC the control unit signal connection, the operation that the system was extracted to the PLC the control unit through induction signal control gaseous phase and precipitation.

The vapor extraction automatic control device also used for well point dewatering comprises: the outer pipe and the inner pipe are embedded into a hole well arranged below the soil surface layer, a gap is formed between the outer pipe and the well wall, a filter material is filled into the lower portion of the gap, and a sealing material is filled into the upper portion of the gap.

The vapor extraction automatic control device also used for well point dewatering comprises: the bottom of outer tube is sealed through outer tube sealing gasket to be equipped with the sediment section, the middle part and the lower part of outer tube are equipped with the outer tube sieve mesh, predetermine minimum early warning water level and highest early warning water level according to actual conditions in the outer tube.

The vapor extraction automatic control device also used for well point dewatering comprises: the bottom of the inner pipe is sealed through an inner pipe sealing gasket and is provided with inner pipe sieve pores for underground water to enter the pipe, and the outer wall of the inner pipe sieve pores wraps the filtering material.

The vapor extraction automatic control device also used for well point dewatering comprises: and the outer pipe pipeline and the inner pipe pipeline are respectively provided with a pipeline opening and closing device which is in signal connection with the PLC control unit through the cable.

The utility model has the advantages that: the utility model discloses make vapor extraction automatic control device can be used for water level monitoring and well point precipitation concurrently, be favorable to promoting the restoration effect as main or supplementary water level control measure to the condition in different places, reduce energy consumption and restoration cost.

Drawings

Fig. 1 is a structural diagram of an automatic vapor extraction control device which is also used for well point dewatering.

Description of reference numerals: 1-an outer tube; 2-inner tube; 3-outer tube sieve mesh; 4-inner tube sieve mesh; 5-water level probe; 6-filtering materials; 7-outer tube sealing gasket; 8-a sediment section; 9-inner tube gasket; 10-a filter material; 11-lowest early warning water level; 12-highest early warning water level; 13-a sealing material; 14-surface layer of soil; 15-a cable; 16-a pipeline opening and closing device; 17-a vacuum pump; 18-a draught fan; 19-a PLC control unit; 20-a water treatment unit; 21-tail gas treatment unit, 22-well wall.

Detailed Description

As shown in fig. 1, the utility model provides a gas phase extraction automatic control device used for well point dewatering, a hole well is arranged under the soil surface layer 14, an outer pipe 1 is sleeved outside an inner pipe 2 and is embedded into the hole well together;

the bottom of the outer pipe 1 is sealed through an outer pipe sealing gasket 7, leakage cannot occur, the bottom of the outer pipe is also provided with a sediment section 8, outer pipe sieve holes 3 are formed in the middle and the lower portion of the outer pipe 1, the position and the range of the upper portion of the outer pipe 1 take the extraction requirement of polluted gas into consideration, the position and the range of the lower portion of the outer pipe take the water level requirement in a well into consideration, underground water enters the pipe, a lowest early warning water level 11 and a highest early warning water level 12 are preset in the outer pipe 1 according to the actual working condition, a gap is formed between the outer pipe 1 and a well wall 22, a filter material 6 is filled in the lower portion of the outer pipe, a sealing material 13 is filled in the upper portion;

the bottom of the inner pipe 2 is sealed through an inner pipe sealing gasket 9, so that the inner pipe cannot leak, the lower part of the inner pipe is provided with an inner pipe sieve pore 4, the position of the inner pipe sieve pore 4 is consistent with that of a lower outer pipe sieve pore 3, underground water enters the inner pipe, the outer wall of the inner pipe sieve pore 4 is wrapped by a filtering material 10, the top end of the inner pipe 2 is communicated with an inner pipe pipeline, the inner pipe pipeline is communicated with a water treatment unit 20 through a vacuum pump 17, and the underground water is pumped and the water level;

the water level probe 5 is arranged on the outer wall of the inner pipe sieve pore 4 and is in signal connection with a PLC (programmable logic controller) unit 19 through a cable 15, and the PLC unit 19 controls the operation of the induced draft fan 18 and the vacuum pump 17 through induction signals;

and the outer pipe pipeline and the inner pipe pipeline are respectively provided with a pipeline opening and closing device 16 which is in signal connection with the PLC control unit 19 through the cable 15 and controls the opening and closing of the pipeline opening and closing device 16.

Taking fig. 1 as an example, according to the operation conditions under different water levels, a lowest early warning water level 11 and a highest early warning water level 12 are preset, when the water level reaches the lowest early warning water level 11, the extraction of groundwater for precipitation can be started, and when the water level reaches the highest early warning water level 12, the vapor extraction operation is turned off, and the induced draft fan 18 and the tail gas treatment unit 21 are damaged by the groundwater.

1-when the underground water level in the outer pipe 1 rises and rises to the lowest early warning water level 11, the water level probe 5 senses the water level change and transmits a sensing signal to the PLC control unit 19 through the cable 15, the PLC control unit 19 transmits a starting instruction to the pipeline opening and closing device 16 and the vacuum pump 17 on the inner pipe pipeline through the sensing signal to perform the precipitation operation of extracting the underground water, and the vacuum pump 17 transmits the extracted water to the water treatment unit 20 to perform the pollution treatment operation; when the precipitation speed is higher than the lifting speed of the water level in the pipe and lower than the lowest early warning water level 11, the PLC control unit 19 transmits a closing instruction to the pipe opening and closing device 16 and the vacuum pump 17 on the pipe of the inner pipe, so that the precipitation operation can be stopped, and the vapor extraction operation can be continued.

2-the precipitation speed is less than intraductal water level lifting speed, precipitation operation lasts, when the water level stops at highest early warning water level 12, continue precipitation operation, when the water level rises to highest early warning water level 12, and continue to rise, water level probe 5 senses the water level change, and transmit the sensing signal to PLC the control unit 19 in through cable 15, PLC the control unit 19 passes through the sensing signal, pipeline headstock gear 16 and the draught fan 18 transmission on the outer pipe way close the instruction, stop the gas phase extraction operation, avoid draught fan 18 and tail gas processing unit 21 to receive the harm, precipitation operation continues to go on simultaneously.

3-after continuous precipitation operation, when the water level of underground water is reduced to below the maximum early warning water level 12, the water level probe 5 senses the water level change and transmits a sensing signal to the PLC control unit 19 through the cable 15, the PLC control unit 19 transmits a starting instruction to the pipeline opening and closing device 16 and the induced draft fan 18 on the outer pipeline through the sensing signal to perform vapor phase extraction operation, meanwhile, the precipitation operation is continuously performed, until the water level in the pipeline is reduced to below the minimum early warning water level 11, the PLC control unit 19 transmits a closing instruction to the pipeline opening and closing device 16 and the vacuum pump 17 on the inner pipeline, the precipitation operation can be stopped, and the vapor phase extraction operation is continuously performed.

The utility model discloses the advantage:

the utility model discloses make vapor extraction automatic control device can be used for water level monitoring and well point precipitation concurrently, be favorable to promoting the restoration effect as main or supplementary water level control measure to the condition in different places, reduce energy consumption and restoration cost.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A vapor extraction automatic control device also used for well point dewatering is characterized in that: outside inner tube (2) were located to outer tube (1) cover, the top and the outer tube pipeline intercommunication of outer tube (1), the outer tube pipeline passes through draught fan (18) and tail gas processing unit (21) intercommunication, and the air feed is extracted mutually, the top and the inner tube pipeline intercommunication of inner tube (2), the inner tube pipeline passes through vacuum pump (17) and water processing unit (20) intercommunication, extracts groundwater and control water level, inner tube (2) bottom outer wall department is equipped with level probe (5) to through cable (15) and PLC the signal connection of PLC the control unit (19), the operation of system is extracted through sensing signal control gaseous phase and precipitation to PLC the control unit (19).

2. The automatic control device for vapor extraction of well point dewatering as claimed in claim 1, characterized in that: the outer tube (1) and the inner tube (2) are embedded into a perforated well arranged below a soil surface layer (14) together, a gap is formed between the outer tube (1) and a well wall (22), a filter material (6) is filled into the lower portion of the gap, and a sealing material (13) is filled into the upper portion of the gap.

3. The automatic control device for vapor extraction of well point dewatering as claimed in claim 1, characterized in that: the bottom of outer tube (1) is sealed through outer tube sealing gasket (7) to be equipped with sediment section (8), the middle part and the lower part of outer tube (1) are equipped with outer tube sieve mesh (3), predetermine minimum early warning water level (11) and highest early warning water level (12) according to actual conditions in outer tube (1).

4. The automatic control device for vapor extraction of well point dewatering as claimed in claim 1, characterized in that: the bottom of inner tube (2) seals through inner tube sealed pad (9) to be equipped with inner tube sieve mesh (4), supply groundwater to get into intraductally, the outer wall parcel filter material (10) of inner tube sieve mesh (4).

5. The automatic control device for vapor extraction of well point dewatering as claimed in claim 1, characterized in that: and the outer pipe pipeline and the inner pipe pipeline are respectively provided with a pipeline opening and closing device (16) which is in signal connection with the PLC control unit (19) through the cable (15).