CN218064432U

CN218064432U - Can concentrate coal gas drainage system of retrieving gas

Info

Publication number: CN218064432U
Application number: CN202222012633.7U
Authority: CN
Inventors: 李丹丹; 江厚月; 江萍; 曹彦
Original assignee: Geyi Nanjing Intelligent Technology Co ltd; JIANGSU WISDOM ENGINEERING TECHNOLOGY CO LTD
Current assignee: Geyi Nanjing Intelligent Technology Co ltd; JIANGSU WISDOM ENGINEERING TECHNOLOGY CO LTD
Priority date: 2022-08-02
Filing date: 2022-08-02
Publication date: 2022-12-16
Anticipated expiration: 2032-08-02

Abstract

The utility model discloses a can concentrate coal gas drainage system of recovery gas, this system include coal gas drainer, prevent revealing device, gas recovery device, draught fan and gas purification device, prevent revealing the device and communicate with coal gas drainer and gas recovery device respectively, the draught fan communicates with gas recovery device and gas purification device respectively. This system can collect leaking gaseous pollutant when the coal gas drainer takes place to leak to carry out purification treatment to gaseous pollutant, solve because of the loss of pollutant in the coal gas or the environmental pollution that the leakage brought under the breakdown state, and do not influence and overhaul and patrol and examine the coal gas drainer.

Description

Can concentrate coal gas drainage system of retrieving gas

Technical Field

The utility model relates to a coal gas drainage system especially relates to a can concentrate coal gas drainage system who retrieves gas, belongs to coal gas conveying equipment technical field.

Background

The coal gas drainer is the main accessory equipment of gas transmission pipeline, and the coal gas drainer adopts the type of water-sealed tank to seal basically mostly at present, and this type has sealed effectual, advantages such as simple structure, but receives the influence of coal gas transmission pressure fluctuation, and ordinary coal gas drainer has the pipe network superpressure operating mode water seal and is punctured the phenomenon that causes the coal gas to leak easily. The breakdown state is divided into small breakdown and large breakdown, wherein the small breakdown means that the gas pressure is slightly larger than the water seal height of the gas drainer, the effective water seal height of the gas drainer is basically unchanged, and a small amount of gas overflows the gas drainer. After the gas pressure returns to the normal pressure, the gas does not leak. The large breakdown means that the gas pressure is higher than the actual water seal height and exceeds the breakdown pressure of the water seal, a large amount of gas is leaked during the breakdown, the effective water seal height of the gas drainer is reduced at the moment, and the gas still continues to leak after the pressure is recovered to be normal. No matter which breakdown state is adopted, leaked gas can be exhausted into the atmosphere, and the risk of gas poisoning of the surrounding working environment is increased. Although many coal gas drainers all set up and prevent leaking the device, furthest reduced coal gas and leaked the risk under the breakdown state, pollutants such as hydrogen sulfide, ammonia that contain in the coal gas also can dissolve in aquatic, and the overflow along with condensate water in the water seal is carried out, in the loss to the atmosphere, and the loss of pollutants such as hydrogen sulfide, ammonia also makes operational environment worsen. Therefore, it is urgently needed to develop a gas drainage system capable of intensively recovering gas.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims at providing a can concentrate coal gas drainage system who retrieves gas that coal gas drainer revealed carries out the optimal design through the structure to coal gas water seal drainage system, and the convenience is collected leaking gaseous pollutant, solves the environmental pollution that brings because of the loss of pollutant in the coal gas or the leakage under the breakdown state, and does not influence and overhaul and patrol and examine the coal gas drainer.

The technical scheme is as follows: the utility model relates to a can concentrate coal gas drainage system of recovered gas, including coal gas drainer, anti-leakage device, still include gas recovery unit, draught fan and gas purification device, anti-leakage device passes through the pipeline and communicates with coal gas drainer and gas recovery unit respectively, the draught fan passes through the pipeline and communicates with gas recovery unit and gas purification device respectively.

Furthermore, a gas phase balance pipe is arranged between the gas drainer and the gas recovery device, and a control valve is arranged on the gas phase balance pipe.

Further, the gas phase equilibrium tube is in a pi shape.

Furthermore, the top of the gas drainer is also provided with an opening for adding water.

Further, the gas recovery device is internally provided with a heating device which is used for evaporating the gas in the liquid in the gas recovery device and then feeding the gas into the gas purification device for purification and recovery.

Furthermore, a floating ball liquid level meter is further arranged inside the gas recovery device and consists of a floating barrel and a floating barrel liquid level scale.

Furthermore, a float valve is arranged in the gas recovery device, a discharge pipe is arranged outside the side wall of the gas recovery device, and the water discharge of the discharge pipe is controlled through the float valve.

Furthermore, the upper part of the gas recovery device is also provided with a flange type top cover plate convenient to overhaul.

Furthermore, the flange type top cover plate is provided with a gas collecting port, a water outlet port, a gas balance port and a liquid level meter port for the up-and-down movement of the liquid level scale of the buoy.

Furthermore, a polytetrafluoroethylene gasket is adopted between the liquid level meter port and the float liquid level scale for sealing, a certain gap is reserved, and free movement of the float liquid level scale is not influenced.

Has the advantages that: compared with the prior art, the utility model has the advantages of it is following:

(1) The gas recovery device is arranged in the gas drainage system, so that discharged gas in the gas drainage device is recovered, and toxic and harmful gas is prevented from being discharged into the environment along with water.

(2) According to the coal gas drainage system, the fan is arranged between the gas recovery device and the gas purification device, so that micro negative pressure in the gas recovery device is maintained during normal operation, and toxic and harmful gases are prevented from escaping to the environment from the gas recovery device.

(3) The gas phase balance pipe is arranged at the top of the gas drainer (high-low pressure chamber), and the gas phase side of the high-pressure chamber of the drainer is connected with the gas recovery device, so that the problem of gas resistance caused by unsmooth drainage when the gas drainer is in small breakdown is solved.

(4) The gas drainage system is provided with the floating ball liquid level meter in the gas recovery device, so that the liquid level in the gas recovery device can be observed visually, and the top of the gas recovery device is connected with a flange, so that the gas drainage system is convenient to overhaul and patrol. The side of the gas recovery device is provided with a discharge pipe controlled by a floating ball valve, and when the liquid level in the gas recovery device rises to the set liquid level, the floating ball valve is automatically opened to discharge water. The arrangement of the gas recovery device is not only suitable for the drainer with the reverse sealing leakage-proof device, but also suitable for the drainer with the forward sealing leakage-proof device.

(5) The gas drainage system can directly discharge the air in the high-low pressure chamber into the gas recovery device when water is added for the first time, and the gas drainage system is not required to be manually opened through an exhaust valve, so that the operation is convenient.

Drawings

FIG. 1 is a schematic structural view of a gas drainage system;

FIG. 2 is a schematic view of a float level gauge;

fig. 3 is a schematic view of an opening of a top cover plate of the gas recovery device.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

Example 1

As shown in fig. 1, the gas drainage system capable of intensively recovering gas according to the present invention includes a gas drainage device 2, a leakage prevention device 5, a gas recovery device 10, an induced draft fan 16, and a gas purification device 17. The anti-leakage device 5 is respectively communicated with the gas drainer 2 and the gas recovery device 10, and the induced draft fan 16 is respectively communicated with the gas recovery device 10 and the gas purification device 17.

The coal gas drainer 2 is divided into a high-pressure chamber and a low-pressure chamber, a condensed water inlet 1 is arranged at the top of the high-pressure chamber, and an inspection port 14 is arranged at the bottom of the side wall of the high-pressure chamber and used for inspecting the blocking condition of impurities during maintenance or failure or opening. The high-pressure chamber of the gas drainer 2 is communicated with the gas recovery device 10 through a gas phase balance pipe 6 and a control valve 13. The upper part of the sidewall of the low pressure chamber is provided with an overflow port 4, and the overflow port 4 is communicated with an anti-leakage device 5 through a pipeline. The bottom of the sidewall of the low pressure chamber is provided with an inspection opening 14. The gas phase balance tube 6 is arranged in a pi shape, and a low-point liquid bag cannot be generated in the middle.

The anti-leakage device 5 is internally provided with a liquid level meter which consists of a buoy 18 and a buoy liquid level scale 8. The side wall of the upper part of the leakage-proof device 5 is provided with a drainage pipeline. The overflow opening 4 should be kept at the same height as the front end discharge opening of the discharge duct of the leakage preventing device 5.

The gas recovery device 10 is filled with water, and the bottom end of the gas recovery device is provided with a heating device 12, so that the solubility of harmful gases such as hydrogen sulfide, ammonia gas and the like in water is reduced, the harmful gases are forced to escape in a negative pressure state, and finally the harmful gases are sent to a gas purification device (17) for purification and recovery. Water is filled in the gas recovery device 10, and a floating ball liquid level meter is arranged in the gas recovery device 10 and used for measuring the liquid level of the water. As shown in fig. 2, the float level gauge is composed of a float 18 and a float level scale 8.

The inside of the gas recovery device 10 is also provided with a ball float valve 11, the outside of the side wall of the gas recovery device 10 is provided with a discharge pipe 15, and the discharge amount of the discharge pipe 15 can be controlled through the ball float valve 11. The drainage pipeline of the leakage-proof device 5 is connected to the position of the gas outlet of the drainage pipeline on the side wall of the leakage-proof device 5 just below the water level in the gas recovery device 10, so that the ball float valve 11 can be opened for drainage before the water level in the gas recovery device 10 reaches the height of the connecting pipe opening of the drainage pipe 15.

As shown in fig. 3, a flange-type top cover plate 3 for easy maintenance is further provided on the upper part of the gas recovery apparatus 10. The flange type top cover plate 3 is provided with a gas collecting port 9, a water outlet port 7, a gas balance port 20 and a liquid level meter port 21, wherein the gas collecting port 9 is communicated with an induced draft fan 16 through an exhaust pipeline. The induced draft fan 16 may be used to maintain the negative pressure inside the gas recovery device 10 so as to ensure that the harmful gases dissolved in the liquid do not escape to the atmosphere to the maximum extent. The liquid level meter port 21 can be used for the up-and-down movement of the float liquid level scale 8. A polytetrafluoroethylene gasket is adopted between the liquid level meter port 21 and the float level scale 8 for sealing, a certain gap is reserved, the free movement of the float level scale 8 is not influenced, and the gap is not too large. The drainage pipeline on the side wall of the anti-leakage device 5 is connected with the interface of the anti-leakage device 5 and the top cover plate 3 of the gas recovery device 10 through flanges, so that the installation, the disassembly and the maintenance are convenient.

When in use:

in the initial operation stage of the gas drainage system, water with a certain liquid level is supplemented into the gas drainage device 2 through the condensed water inlet 1. The liquid level in the gas recovery device 10 must be set lower than the liquid level in the gas drainer 2 and the leakage preventing device 5. When the gas drainer 2 leaks, the liquid level in the leakage-proof device 5 exceeds the interface between the side wall drainage pipeline and the leakage-proof device 5, gas and liquid in the leakage-proof device 5 enter the gas recovery device 10 along with the drainage pipeline, and are heated by the heating device 12, so that hydrogen sulfide, ammonia gas and the like contained in water enter the gas purification device 17 along with the gas through the gas collection port 9 and the draught fan 16, and the waste gas is prevented from escaping into the environment. The heat source of the heating device 12 needs to be controlled within the boiling point of water, and if other heating methods such as electricity are used, the temperature inside the gas recovery device 10 needs to be monitored.

Before the operation of the gas recovery device 10, a certain level of water needs to be supplemented, and the water can be added from the condensed water inlet (1) or added from another opening at the top of the gas drainer (2), which is the common practice.

The pipeline connected with the gas collecting port (9) can share one induced draft fan (16) and a gas purification device (17) by a plurality of gas recovery devices, and finally the induced draft fan and the gas purification device are collected and then sent to the gas purification device (17) for centralized treatment.

When the gas pressure in the high-pressure chamber of the gas drainer 2 is higher than a set value, the control valve 13 on the gas balance pipe 6 takes the gas side pressure of the high-pressure chamber of the gas drainer 2 as a control signal, the gas control valve 13 is opened to release the gas in the high-pressure chamber to the gas recovery device 10, and the discharged gas enters the gas purification device 17 from the gas collecting port 9 and the induced draft fan 16, so that the waste gas is prevented from escaping into the environment.

The collected and treated liquid in the gas recovery device 10 is connected to an underground drainage tank or other waste liquid treatment facility through a drainage pipe 15.

Claims

1. The utility model provides a can concentrate recovery gas's coal gas drainage system, includes coal gas drainer (2), prevents revealing device (5), its characterized in that still includes gas recovery unit (10), draught fan (16) and gas purification device (17), prevent revealing device (5) and communicate with coal gas drainer (2) and gas recovery unit (10) respectively through the pipeline, draught fan (16) communicate with gas recovery unit (10) and gas purification device (17) respectively through the pipeline.

2. The gas drainage system capable of intensively recovering gas according to claim 1, wherein a gas phase balance pipe (6) is arranged between the gas drainage device (2) and the gas recovery device (10), and a control valve (13) is arranged on the gas phase balance pipe (6).

3. Gas drainage system for the centralized recovery of gases according to claim 2, characterized in that said gas-phase equilibrium duct (6) is of the "pi" type.

4. The gas drainage system for centralized recovery of gas as claimed in claim 1, wherein the top of the gas drainer (2) is further provided with an opening for adding water.

5. The gas drainage system capable of intensively recovering gas according to any one of claims 1 to 4, wherein a heating device (12) is arranged inside the gas recovery device (10) and is used for evaporating the gas in the liquid in the gas recovery device (10) and then feeding the evaporated gas into a gas purification device (17) for purification and recovery.

6. The gas and water drainage system for centralized gas recovery as claimed in claim 5, wherein a float level meter is further provided inside said gas recovery device (10), said float level meter is composed of a float (18) and a float level gauge (8).

7. The gas drainage system for centralized recovery of gas according to claim 6, wherein a ball float valve (11) is provided in the gas recovery device (10), and a discharge pipe (15) is provided outside the sidewall of the gas recovery device (10).

8. The gas drainage system for centralized gas recovery according to claim 7, wherein the upper part of the gas recovery device (10) is further provided with a flange-type top cover plate (3) for easy maintenance.

9. The gas drainage system for centralized gas recovery according to claim 8, wherein the flange-type top cover plate (3) is provided with a gas collection port (9), a water outlet port (7), a gas balance port (20) and a liquid level meter port (21) for the up-and-down movement of the buoy liquid level scale (8).

10. The gas drainage system for centralized gas recovery as claimed in claim 8, wherein the level gauge port (21) is sealed with the float level gauge (8) by a teflon gasket with a certain gap, so as not to affect the free movement of the float level gauge (8).