CN218565437U

CN218565437U - Low-nitrogen combustion device of garbage power plant

Info

Publication number: CN218565437U
Application number: CN202222166624.3U
Authority: CN
Inventors: 罗重奎; 黄鸿满; 梁涛; 詹欣花; 熊启明
Original assignee: Guangzhou Huantou Design And Research Institute Co ltd
Current assignee: Guangzhou Huantou Design And Research Institute Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-03-03
Anticipated expiration: 2032-08-17

Abstract

The utility model relates to a low nitrogen burner of rubbish power plant belongs to interior environment-friendly device of rubbish power plant. It discloses that the exhaust pipe of the garbage pool is connected to the inlet of a primary air fan, the outlet of the primary air fan is connected to the inlet of a primary air pipe, a biogas burner is arranged in the primary air pipe, the outlet of the primary air pipe is connected to the inlet of a boiler, the outlet of the boiler is connected to a flue gas treatment system, the flue gas treatment system is connected to a chimney, and a biogas pool is connected to the biogas burner through a booster fan. The utility model has the advantages that effectively realize marsh gas resource utilization, reduce the emission of rubbish power plant oxynitride simultaneously.

Description

Low-nitrogen combustion device of garbage power plant

Technical Field

The utility model relates to a combustor that marsh gas utilization and boiler low nitrogen burning combined together, specifically speaking is a low nitrogen burner of rubbish power plant.

Background

In order to adapt to the development of urbanization and solve the problem of the refuse surrounding, a plurality of cities establish a relatively large-scale refuse power plant, and other related processing facilities, such as a biomass processing plant, a leachate processing plant, a slag processing plant and the like, are also established around the refuse power plant to form a set of circular economy comprehensive park.

Nitrogen oxides (NOx) are one of the main sources of atmospheric pollution, photochemical smog, acid rain, and greenhouse effect, and their governance has been the focus of attention and research. And the garbage incineration power plant in the garden generates a large amount of nitrogen oxides after the garbage incineration, and the emission of the nitrogen oxides is strictly controlled.

Daily operation treatment in gardens can produce a large amount of marsh gas, and marsh gas is a renewable clean energy, and present many gardens all adopt torch direct combustion to discharge, and the energy not only is wasted to marsh gas of this mode processing, and direct combustion discharges and also can cause a bit pollution to the environment moreover, does not conform to ecological civilization spirit.

The actual conditions of the park are combined, the biogas is required to be treated, the resource utilization of the biogas is realized, the emission of nitrogen oxides is also required to be reduced, if the biogas and the nitrogen oxides can be combined, the combination of the biogas treatment and the nitrogen oxide reduction is a technical breakthrough.

Disclosure of Invention

The utility model provides a low nitrogen burner of rubbish power plant, it can effectively realize marsh gas resource utilization, reduces rubbish power plant oxynitride's emission simultaneously.

In order to realize the purpose, the utility model adopts the technical proposal that:

including the garbage bin, the garbage bin blast pipe is connected to the primary air fan entry, and primary air fan exit linkage to primary air pipe entry sets up biogas burner in the primary air pipe, and primary air pipe exit linkage to boiler entry, boiler exit linkage to flue gas processing system, and flue gas processing system is connected to the chimney, and the methane-generating pit is connected to biogas burner through booster fan.

And a biogas regulating valve is also arranged between the booster fan and the biogas burner.

A combustion-supporting air channel arranged in a primary air pipe is arranged at the front end of the biogas burner, an air volume adjusting valve is arranged on the combustion-supporting air channel, an electric head of the air volume adjusting valve is arranged outside the primary air pipe, an emergency cut-off valve is arranged between a booster fan and the biogas adjusting valve, the air volume adjusting valve, an igniter of the biogas burner and the emergency cut-off valve are respectively connected into the DCS system.

The heat generated after the biogas is combusted is used for heating primary air, the temperature requirement of the primary air is met, the temperature of the primary air reaches the design temperature of 220 ℃, meanwhile, the biogas burner is arranged in the primary air pipe, the primary air provides oxygen required by biogas combustion, the oxygen content in the primary air is reduced after combustion, when the primary air lower than the normal air oxygen content is fed into the boiler, low-oxygen combustion is formed when oxygen is supplied for garbage incineration, the production of NOx can be effectively inhibited in the combustion process, the produced nitrogen oxides are reduced, and the emission of the whole nitrogen oxides is obviously reduced after the treatment of a flue gas treatment system.

The utility model has the advantages that the system structure is simple, but can make full use of the marsh gas and reduce the discharge of nitrogen oxide in the garbage power plant.

Drawings

Fig. 1 is a schematic structural view of embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of embodiment 2 of the present invention.

Detailed Description

Example 1

Fig. 1 shows a low-nitrogen combustion apparatus of the present embodiment. An exhaust pipe of the garbage pool 1 is connected to an inlet of a primary air fan 2, an outlet of the primary air fan 2 is connected to an inlet of a primary air pipe 3, a biogas burner 4 is arranged in the primary air pipe 3, a biogas digester 7 is connected to the biogas burner 4 through a booster fan 6 and a biogas regulating valve 5 in sequence from the side, an outlet of the primary air pipe 3 is connected to an inlet of a boiler 8, an outlet of the boiler 8 is connected to a flue gas treatment system 9, and the flue gas treatment system 9 is connected to a chimney 10.

In this embodiment, the garbage pool 1 can provide primary air for combustion of the boiler 8; the primary air fan 2 is used for pressurizing primary air to realize primary air quantity regulation and meet the combustion requirement of a boiler 8; the primary air pipe 3 is used for providing primary air required by the garbage incineration of the boiler 8; preferably, an air volume regulating valve can be additionally arranged between the primary air fan 2 and the primary air pipe 3; the biogas burner 4 is arranged in the primary air pipe 3 and used for burning and processing biogas and heating primary air; the biogas regulating valve 5 is used for controlling the flow of biogas, matching the flow of primary air and realizing the accurate control of oxygen consumption; the booster fan 6 is used for pressurizing the methane and providing conveying power; the methane in the methane tank 7 is the waste gas which is fully utilized; a boiler 8 for incinerating garbage; the flue gas treatment system 9 is used for treating flue gas; stack 10, emissions monitoring pollution, including nitrogen oxides.

Example 2

Fig. 2 shows a schematic structural diagram of the present embodiment, which is further improved on the basis of embodiment 1:

the combustion-supporting air channel 11 is arranged in the primary air pipe 3, and combustion-supporting air is taken from primary air and is mixed with the primary air after combustion. An air quantity regulating valve 12 is arranged on the combustion-supporting air channel 11, and an electric head of the valve is arranged outside the primary air pipe 3. An emergency cut-off valve 15 is additionally arranged between the booster fan 6 and the methane regulating valve 5, the air volume regulating valve 12, an igniter 13 of the methane burner 4 and the emergency cut-off valve 15 are respectively connected to a DCS system 16. The air volume regulating valve 12 and the methane regulating valve 5 are both sent into the DCS 16 to realize the proportion regulation of the online air volume and the methane and meet the combustion requirement, and the igniter 13 is also connected into the DCS 16 to realize the online ignition. The fire arrestor 14 is arranged on the biogas pipe to prevent fire in the biogas burner 4 from entering the pipeline, so as to ensure safety. The biogas pipe is provided with an emergency cut-off valve 15, so that the biogas conveying can be cut off emergently under the condition of flameout or other faults, and the safety is ensured.

The two previous embodiments provide minimum configuration of the low-nitrogen combustion device, and in practice, a plurality of low-nitrogen combustion devices can be connected in parallel to form a larger system network according to the actual requirement configuration in the garbage power plant.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited by the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and are all included in the scope of the present invention.

Claims

1. The utility model provides a low nitrogen burner of rubbish power plant, includes the rubbish pond, its characterized in that: the exhaust pipe of the garbage pool is connected to the inlet of a primary air fan, the outlet of the primary air fan is connected to the inlet of a primary air pipe, a biogas burner is arranged in the primary air pipe, the outlet of the primary air pipe is connected to the inlet of a boiler, the outlet of the boiler is connected to a flue gas treatment system, the flue gas treatment system is connected to a chimney, and the biogas digester is connected to the biogas burner through a booster fan.

2. The low-nitrogen combustion device of the garbage power plant as claimed in claim 1, wherein: and a biogas regulating valve is also arranged between the booster fan and the biogas burner.

3. The low-nitrogen combustion device of the garbage power plant as claimed in claim 2, wherein: the combustion-supporting air channel arranged in the primary air pipe is arranged at the front end of the biogas burner, the air quantity regulating valve is arranged on the combustion-supporting air channel, the electric head of the air quantity regulating valve is arranged outside the primary air pipe, the emergency cut-off valve is arranged between the booster fan and the biogas regulating valve, the igniter and the emergency cut-off valve of the biogas burner are respectively connected into the DCS, and the flame arrester is arranged between the biogas burner and the biogas regulating valve.