CN210921436U

CN210921436U - Automatic steady voltage of incineration plant leachate treatment system marsh gas goes into stove combustion system

Info

Publication number: CN210921436U
Application number: CN201921452575.1U
Authority: CN
Inventors: 吴靖宇; 张爱军; 戴小东; 董健; 李选顺
Original assignee: Beijing Capital Environment Technology Co Ltd
Current assignee: Beijing Capital Environment Technology Co Ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-07-03
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses an burn automatic steady voltage of mill's leachate treatment system marsh gas and go into stove combustion system, including anaerobic reactor, anaerobic reactor gas outlet pipe has connected gradually water seal jar and marsh gas buffer tank, marsh gas buffer tank gas outlet parallel connection has combustor pipeline and torch pipeline, combustor pipeline is including the marsh gas booster fan who connects gradually, go into stove governing valve, go into stove flowmeter and marsh gas burner, marsh gas booster fan exports and is provided with first pressure transmitter, torch pipeline is including torch governing valve and torch. The utility model discloses in, the product flowmeter is add in the reactor export, and the marsh gas combustor front end is through addding flowmeter and governing valve, through matcing the regulation with product gas flow for it is slightly less than product gas flow to go into the stove flow, guarantees the even of burning, continuous and automatic operation.

Description

Automatic steady voltage of incineration plant leachate treatment system marsh gas goes into stove combustion system

Technical Field

The utility model relates to a marsh gas combustion technology field especially relates to an automatic steady voltage of incineration plant leachate treatment system marsh gas goes into stove combustion system.

Background

The main current treatment process of the percolate at present mainly comprises the following steps: the landfill leachate enters an adjusting tank for storage after filtering and settling sand, most organic pollutants (namely COD) are degraded by pumping the landfill leachate into an anaerobic reaction system through a water inlet pump, effluent enters an anoxic reaction tank and an aerobic reaction tank, pollutants such as COD and ammonia nitrogen are further removed, and finally, the landfill leachate is deeply treated through an ultrafiltration system and a reverse osmosis system to meet the requirements of discharge and reuse. Because the garbage leachate has the characteristic of high COD, the anaerobic reactor is used for a leachate treatment system of a domestic garbage incineration plant as a necessary key link for degrading most of COD, the anaerobic reactor can generate a large amount of methane while degrading COD, and if the combustible gas is not utilized, the production safety and the environmental safety of the plant area can be seriously adversely affected. This part of the biogas is collected centrally or burnt by a flare or by an incinerator burner. With the requirements of fine management and energy conservation and emission reduction of an incineration power plant, at present, the part of methane is considered to be conveyed to an incinerator to be incinerated together with garbage in the form of auxiliary fuel.

At present, most of the existing biogas combustion technologies are that a double-membrane gas holder is arranged near an outdoor anaerobic reactor, biogas generated by the anaerobic reactor enters the double-membrane gas holder to be stored, then is conveyed to a torch through a biogas fan or a biogas burner to be combusted, the start and stop of the burner or the torch are controlled through the height of an inner membrane of the gas holder, when the height of the inner membrane rises, the stored biogas amount is increased, and after the biogas reaches a certain height, a booster fan and rear-end combustion equipment are started, and the biogas starts to be combusted; firstly, the existing biogas combustion system controls the operation of the biogas combustion device according to the height of the inner membrane of the gas holder, and the combustion process is interrupted due to the uneven height change of the inner membrane, so that the uniformity of the combustion process cannot be ensured, and the stability of the biogas combustion system is reduced; secondly, current marsh gas combustion system lacks torch burning pressure regulator device, and when the marsh gas that gets into the torch pipeline and torch burning ability mismatch, the pipeline is inside to appear that front end marsh gas volume is big easily, and the little condition of rear end marsh gas consumption for the pipeline is inside to appear holding out the pressure or the decompression phenomenon, thereby leads to the phenomenon that the equipment appears frequently opening and stops, thereby has reduced marsh gas combustion system's result of use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: in order to solve the problems, the automatic pressure stabilization furnace-entering combustion system for the methane of the leachate treatment system of the incineration plant is provided.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides an automatic steady voltage of incineration plant's leachate treatment system marsh gas is gone into stove combustion system, including anaerobic reactor, anaerobic reactor outlet pipe connects gradually water seal jar and marsh gas buffer tank, marsh gas buffer tank gas outlet parallel connection has combustor marsh gas pipeline and torch marsh gas pipeline, combustor marsh gas pipeline is including the marsh gas booster fan, the governing valve of going into the stove, the flowmeter of going into the stove and the marsh gas combustor that connect gradually, marsh gas booster fan export is provided with first pressure transmitter, torch marsh gas pipeline is including torch governing valve and torch, be provided with second pressure transmitter between marsh gas buffer and the torch governing valve, just second pressure transmitter and torch governing valve interlocking control.

As a further description of the above technical solution:

the biogas booster fan is controlled in a frequency conversion mode, and the first pressure transmitter is used for carrying out PID control on the biogas booster fan through a PLC.

As a further description of the above technical solution:

the furnace inlet adjusting valve is an electric adjusting valve, and the opening degree of the furnace inlet adjusting valve is automatically adjusted through a PLC.

As a further description of the above technical solution:

and a gas outlet of the anaerobic reactor is provided with a gas production flow meter.

As a further description of the above technical solution:

and pressure sensors are arranged on the anaerobic reactor gas outlet pipeline and the buffer tank.

As a further description of the above technical solution:

the pressure sensor is interlocked with the biogas burner and the torch.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses in, the product flowmeter is add in the reactor export, and the marsh gas combustor front end is through addding flowmeter and governing valve, through matcing the regulation with product gas flow for it is slightly less than product gas flow to go into the stove flow, guarantees the even of burning, continuous and automatic operation.

2. The utility model discloses in, lead to and increase torch governing valve, torch pipeline second pressure transmitter for marsh gas gets into the ability and the pipeline pressure phase-match that the torch burnt, guarantees to guarantee when rear end marsh gas consumption is low, perhaps when the front end gas production is big, and the marsh gas volume of guaranteeing the marsh gas that produces and rear end consumption is unanimous, avoids appearing suppressing pressure or decompression, and the equipment frequently opens the condition that stops and takes place.

Drawings

Fig. 1 shows a block diagram of a system provided according to an embodiment of the present invention;

fig. 2 shows a process flow diagram of a system provided according to an embodiment of the present invention;

fig. 3 shows a system PID diagram provided according to an embodiment of the present invention.

In the drawings: 100-anaerobic reactor, 210-first pressure sensor, 220-second pressure sensor, 310-water seal tank, 320-biogas buffer tank, 410-combustor biogas pipeline, 420-torch biogas pipeline, 510-gas production flowmeter, 520-furnace entering flowmeter, 610-first pressure transmitter, 620-second pressure transmitter, 710-biogas booster fan, 720-biogas combustor, 810-torch regulating valve, 820-furnace entering regulating valve and 910-torch.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the anaerobic reactor 100 is included, an air outlet pipeline of the anaerobic reactor 100 is sequentially connected with a water seal tank 310 and a biogas buffer tank 320, an air outlet of the biogas buffer tank 320 is connected with a burner biogas pipeline 410 and a torch biogas pipeline 420 in parallel, the burner biogas pipeline 410 comprises a biogas booster fan 710, a furnace inlet adjusting valve 820, a furnace inlet flowmeter 520 and a biogas burner 720 which are sequentially connected, an outlet of the biogas booster fan 710 is provided with a first pressure transmitter 610, the torch biogas pipeline 420 comprises a torch adjusting valve 810 and a torch, a second pressure transmitter 620 is arranged between the biogas buffer and the torch adjusting valve 810, and the second pressure transmitter 620 and the torch adjusting valve 810 are controlled in a linkage manner.

Specifically, as shown in fig. 2, the biogas booster fan 710 is frequency-conversion controlled, and the first pressure transmitter 610 performs PID control on the biogas booster fan 710 through a PLC, so that the outlet air pressure of the booster fan is stabilized at a set value, and the intake pressure requirement of the rear-end combustor is ensured.

Specifically, as shown in fig. 1, the furnace inlet regulating valve 820 is an electric regulating valve, and the furnace inlet regulating valve 820 automatically regulates the opening degree through a PLC, wherein the opening degree is determined according to the furnace inlet flow detected by the rear-end furnace inlet flow meter 520 in real time, so that the furnace inlet flow is maintained at 75% of the gas production flow of the anaerobic reactor 100.

Specifically, as shown in fig. 1 and fig. 3, a gas-generating flow meter 510 is disposed at the gas outlet of the anaerobic reactor 100 for detecting the gas-generating flow rate of the anaerobic reactor 100 in real time.

Specifically, as shown in fig. 1 and fig. 3, a first pressure sensor 210 and a second pressure sensor 220 are respectively disposed on the gas outlet pipeline and the buffer tank of the anaerobic reactor 100, and are used for detecting pressure changes in the gas outlet pipeline and the buffer tank in real time.

Specifically, as shown in fig. 3, the pressure sensor and the biogas burner 720 are interlocked with the torch 910, and when the sensed pipeline pressure is lower than or exceeds a safety limit, the operation of the equipment is stopped in time, thereby ensuring the operation safety of the equipment.

The working principle is as follows: when the device is used, biogas generated by the anaerobic reactor 100 enters the biogas buffer tank 320 through the water seal tank 310 for buffering, the biogas flow meter 510 on the pipeline monitors the biogas flow of the anaerobic reactor 100 in real time, most of the biogas in the biogas buffer tank 320 enters a combustor pipeline, the biogas is pushed to the biogas combustor 720 through the booster fan, the first pressure transmitter 610 arranged on the outlet of the booster fan performs PID control on the booster fan frequency converter in real time, so that the air pressure at the outlet of the booster fan is stabilized at a set value, the intake pressure requirement of the rear-end combustor is ensured, meanwhile, the furnace entering regulating valve 820 and the furnace entering flow meter 520 are additionally arranged on the combustor pipeline, the furnace entering regulating valve 820 automatically regulates the opening of the furnace entering regulating valve 820 through a PLC, and the opening is determined according to the furnace entering biogas flow detected by the furnace entering flow meter 520 in real time, so that the furnace entering biogas flow always controls 75%, make marsh gas combustor 720 combustion process even, it is continuous, thereby combustion system's stability has been guaranteed, remaining marsh gas gets into torch 910 through the torch pipeline and burns, through second pressure transmitter 620 and torch governing valve 810 that chain set up on the torch pipeline, make when marsh gas combustor 720 stop work, perhaps when going into stove marsh gas flow and fluctuate, will lead to the marsh gas volume that gets into torch 910 to fluctuate, the change of this kind of atmospheric pressure will be felt to second pressure transmitter 620 on the torch pipeline, through the aperture of adjusting rear end torch governing valve 810 in real time, the tolerance of torch burning is adjusted, thereby guarantee that the balance of front end marsh gas production volume and rear end marsh gas consumption is unanimous, guarantee the normal operating of torch 910, avoid the emergence of the condition that equipment frequently opened and shut down.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an automatic steady voltage of incineration plant's leachate treatment system marsh gas goes into stove combustion system which characterized in that, including anaerobic reactor, anaerobic reactor outlet pipe connects gradually water seal jar and marsh gas buffer tank, marsh gas buffer tank gas outlet parallel connection has combustor marsh gas pipeline and torch marsh gas pipeline, combustor marsh gas pipeline is including the marsh gas booster fan, the governing valve of going into the stove, the flowmeter of going into the stove and the marsh gas combustor that connect gradually, marsh gas booster fan export is provided with first pressure transmitter, torch marsh gas pipeline is including torch governing valve and torch, be provided with second pressure transmitter between marsh gas buffer and the torch governing valve, just second pressure transmitter and torch governing valve interlocking control.

2. The automatic stable-pressure furnace-entering biogas combustion system of the leachate treatment system of the incineration plant as claimed in claim 1, wherein the biogas booster fan is frequency-variable controlled, and the first pressure transmitter performs PID control on the biogas booster fan through a PLC.

3. The automatic stable-pressure furnace-entering biogas combustion system for the leachate treatment system of an incineration plant according to claim 1, wherein the furnace-entering regulating valve is an electric regulating valve, and the opening of the furnace-entering regulating valve is automatically regulated by a PLC.

4. The automatic pressure-stabilizing methane furnace-entering combustion system for the percolate treatment system of an incineration plant as claimed in claim 1, characterized in that a gas-producing flow meter is arranged at the gas outlet of the anaerobic reactor.

5. The automatic pressure-stabilizing methane furnace-entering combustion system of the leachate treatment system of an incineration plant of claim 1, wherein pressure sensors are arranged on the gas outlet pipeline of the anaerobic reactor and the buffer tank.

6. The automatic pressure-stabilizing methane furnace-entering combustion system for the percolate treatment system of an incineration plant as claimed in claim 5, wherein the pressure sensor is interlocked with a methane burner and a torch.