CN215446511U

CN215446511U - Biomass boiler low-nitrogen combustion system

Info

Publication number: CN215446511U
Application number: CN202022905365.2U
Authority: CN
Inventors: 雷桂华; 陈沛君; 邓晓文
Original assignee: Guangzhou Devotion Thermal Technology Co Ltd
Current assignee: Guangzhou Devotion Thermal Technology Co Ltd
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-01-07
Anticipated expiration: 2030-12-07

Abstract

The utility model discloses a biomass boiler low-nitrogen combustion system which comprises a combustion furnace main body, a tail gas conveying pipe, a residue filter, an economizer and a tail gas cleaning device, wherein the tail gas cleaning device comprises an atomization cleaning box and a solution adsorption box, a partition plate is arranged at the top of an inner cavity of the atomization cleaning box, an atomization nozzle is arranged on one side wall of the atomization cleaning box, an air outlet is arranged on the other side wall of the atomization cleaning box, a water outlet is arranged on one side of the bottom wall of the atomization cleaning box, a filter screen is arranged at the water outlet, a residue collecting groove is arranged at one end of the atomization cleaning box, and a screen mesh structure capable of sliding towards two ends is arranged at the bottom of the atomization cleaning box. The biomass boiler low-nitrogen combustion system provided by the utility model belongs to the technical field of biomass boiler combustion, can cool flue gas and adsorb partial nitrogen oxides in the flue gas, and simultaneously takes away solid particles in the flue gas, so that the emission of the nitrogen oxides is effectively reduced.

Description

Biomass boiler low-nitrogen combustion system

Technical Field

The utility model relates to a biomass boiler combustion technology, in particular to a low-nitrogen combustion system of a biomass boiler.

Background

The biomass boiler is a kind of boiler, and a boiler using biomass energy as fuel is called a biomass boiler and is divided into a biomass steam boiler, a biomass hot water boiler, a biomass hot blast stove, a biomass heat-conducting oil furnace, a vertical biomass boiler, a horizontal biomass boiler and the like.

Classifying the biomass boiler: horizontal biomass boiler, vertical biomass boiler. Biomass fuel gas heat-conducting oil furnace, biomass steam boiler, biomass hot water boiler and biomass heat-conducting oil furnace.

Low NOx combustion technology is a technology that improves combustion equipment or controls combustion conditions to reduce the concentration of NOx in the combustion exhaust. The main factors influencing the generation of NOx during combustion are the combustion temperature, the residence time of the flue gas in the high temperature zone, the concentration of the various components in the flue gas and the degree of mixing, so that varying the air-fuel ratio, the temperature of the combustion air, the degree of cooling of the combustion zone and the shape design of the burner can reduce the generation of nitrogen oxides during combustion. The industrial purpose is achieved by reducing the excess air and adopting methods of sectional combustion, flue gas circulation, low-temperature air preheating, special burners and the like.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems of the prior art and provides a biomass boiler low-nitrogen combustion system capable of effectively reducing nitrogen oxide emission.

In order to achieve the purpose, the utility model provides a biomass boiler low-nitrogen combustion system, which comprises a combustion furnace main body and a tail gas conveying pipe connected with a smoke outlet of the combustion furnace main body, wherein a residue filter, a coal economizer and a tail gas cleaning device are sequentially arranged on the tail gas conveying pipe, the tail gas cleaning device comprises an atomization cleaning box and a solution adsorption box, a partition board for separating the inner cavity of the atomization cleaning box is vertically arranged at the top of the inner cavity of the atomization cleaning box, an atomization nozzle is arranged on one side wall of the atomization cleaning box, an air outlet is arranged on the other side wall of the atomization cleaning box, a water outlet is arranged on one side of the bottom wall of the atomization cleaning box, a filter screen is arranged at the water outlet, a circulating pressure pump capable of communicating the water outlet and the atomization nozzle is arranged on the atomization cleaning box, a slag collecting groove is arranged at one end of the atomization cleaning box, a screen structure capable of sliding towards two ends is arranged at the bottom of the atomization cleaning box, the other end of the atomization cleaning box is provided with a screen mesh structure driving mechanism; the bottom of one side of the solution adsorption tank is provided with an air inlet pipe connected with the air outlet, and the top of the other side of the solution adsorption tank is provided with an exhaust pipe.

Furthermore, the slag collecting groove is arranged at the bottom of the atomization cleaning box and protrudes downwards in an inclined mode, and the screen mesh structure can be adapted to the filter screen.

Furthermore, the screen mesh structure driving mechanism comprises a screw rod, a screw nut and a guide rod which are arranged on the screen mesh structure, and a screw rod motor device which is arranged on the outer wall of one end of the atomization cleaning box.

Furthermore, two ends of the partition board are provided with two vertically arranged guide strips, the two guide strips are slidably provided with scrapers adapted to the side surfaces of the guide strips, and the screen structure is hinged with a push-pull rod hinged with the scrapers.

Furthermore, a rotating brush is arranged at the notch of the slag collecting groove, and a rotating motor for driving the rotating brush is arranged on the outer wall of one end of the slag collecting groove.

Advantageous effects

Compared with the prior art, the biomass boiler low-nitrogen combustion system has the following beneficial effects:

(1) according to the biomass boiler low-nitrogen combustion system, the atomizing nozzles are arranged in the atomizing cleaning box to spray water and mist to the inward flue gas, so that the flue gas is cooled and part of nitrogen oxides in the flue gas are adsorbed, meanwhile, solid particles in the flue gas can be taken away, and the emission of the nitrogen oxides is effectively reduced;

(2) according to the low-nitrogen combustion system of the biomass boiler, the atomization cleaning box is internally provided with the screen structure and the scraper for cleaning waste residues, so that the internal structure of the atomization cleaning box is kept clean.

Drawings

FIG. 1 is a schematic structural diagram of a low-nitrogen combustion system of a biomass boiler according to the utility model;

FIG. 2 is an enlarged front view of the internal structure of the mist cleaning tank of the present invention;

FIG. 3 is an enlarged side view of the internal structure of the mist cleaning tank of the present invention;

fig. 4 is an enlarged plan view of the structure of the squeegee and the guide bar in the utility model.

In the figure: 1. a furnace body; 2. a tail gas conveying pipe; 3. a residue filter; 4. a coal economizer; 5. a tail gas cleaning device; 6. an atomization cleaning box; 7. a solution adsorption tank; 8. a partition plate; 9. an atomizing nozzle; 10. an air outlet; 11. a water outlet; 12. filtering with a screen; 13. a circulating booster pump; 14. a slag collecting groove; 15. a screen mesh structure; 16. A screen structure drive mechanism; 17. an air inlet pipe; 18. an exhaust pipe; 19. a screw rod; 20. a lead screw nut; 21. A screw motor device; 22. a guide bar; 23. a guide strip; 24. a squeegee; 25. a push-pull rod; 26. the brush is rotated.

Detailed Description

The utility model is further described below with reference to examples, but not to be construed as being limited thereto, and any number of modifications which can be made by anyone within the scope of the claims are also within the scope of the claims.

Specific embodiments of the present invention are such that: referring to fig. 1-4, a biomass boiler low-nitrogen combustion system comprises a combustion furnace main body 1 and a tail gas conveying pipe 2 connected with a flue gas outlet of the combustion furnace main body 1, wherein a residue filter 3, a coal economizer 4 and a tail gas cleaning device 5 are sequentially arranged on the tail gas conveying pipe 2, the tail gas cleaning device 5 comprises an atomization cleaning box 6 and a solution adsorption box 7, a partition plate 8 for separating an inner cavity of the atomization cleaning box 6 is vertically arranged at the top of the inner cavity of the atomization cleaning box 6, an atomization nozzle 9 is arranged on one side wall of the atomization cleaning box 6, a tail gas inlet connected with the tail gas conveying pipe 2 is arranged at the top of one side of the atomization cleaning box 6, a gas outlet 10 is arranged on the other side wall of the atomization cleaning box 6, a water outlet 11 is arranged on one side of the bottom wall of the atomization cleaning box 6, a filter screen 12 is arranged at the water outlet 11, a circulating pressure pump 13 capable of communicating the water outlet 11 with the atomization nozzle 9 is arranged on the atomization cleaning box 6, a slag collecting groove 14 is arranged at one end of the atomization cleaning box 6, a screen structure 15 capable of sliding towards two ends is arranged at the bottom of the atomization cleaning box 6, and a screen structure driving mechanism 16 is arranged at the other end of the atomization cleaning box 6; the bottom of one side of the solution adsorption tank 7 is provided with an air inlet pipe 17 connected with the air outlet 10, and the top of the other side of the solution adsorption tank 7 is provided with an exhaust pipe 18. The solution adsorption tank 7 is filled with an adsorbent solution.

The circulating booster pump 13 can be connected with the water storage tank, the water outlet pipe of the water outlet 11 can be connected with the water storage tank, and a drain valve is arranged on the water outlet pipe of the water outlet 11, so that sewage can be discharged through the drain valve; the height of the water surface in the atomization cleaning box 6 is not higher than the lowest end of the clapboard 8.

In the biomass boiler low-nitrogen combustion system, the atomizing nozzle 9 is arranged in the atomizing cleaning box 6 to spray water and mist to the inward flue gas, so that the flue gas is cooled and part of nitrogen oxides in the flue gas are adsorbed, meanwhile, solid particles in the flue gas can be taken away, and the emission of the nitrogen oxides is effectively reduced; set up screen cloth structure 15 in the clean case 6 of atomizing and clear up the waste residue, keep the clean of the clean 6 inner structure of atomizing case, screen cloth structure actuating mechanism 16 drive screen cloth structure 15 round trip movement scrapes the solid particle of aquatic and collects to collection sediment groove 14.

In this embodiment, the slag collecting groove 14 is arranged at the bottom of the atomizing cleaning box 6 in a downward protruding manner, the screen structure 15 can be adapted to the filter screen 12, and the screen structure 15 can scrape away dust and waste slag on the filter screen 12 on one side. Screen cloth structure 15 is located the below of baffle 8, and screen cloth structure 15 can scrape away the solid particle in the liquid of atomizing cleaning tank 6 bottom, and screen cloth structure 15 can scrape away the granule on filter screen 12.

In this embodiment, the screen structure driving mechanism 16 includes a screw 19, a screw nut 20 provided on the screen structure 15, a guide rod 22, and a screw motor device 21 provided on an outer wall of one end of the aerosol cleaning tank 6.

In this embodiment, two vertically arranged guide bars 23 are disposed at two ends of the partition 8, scrapers 24 adapted to the side surfaces of the guide bars 23 are slidably disposed on the two guide bars 23, a push-pull rod 25 hinged to the scrapers 24 is hinged to the screen structure 15, and when the screen structure 15 moves back and forth at two ends, the push-pull rod 25 on the screen structure 15 can drive the scrapers 24 to reciprocate up and down, so that dust on the partition 8 is scraped downwards, and the partition 8 is kept clean.

In this embodiment, the cross section of the guide bar 23 is T-shaped, T-shaped slots are provided at two ends of the scraper 24, and the scraper 24 is connected with the guide bar 23 through the T-shaped slots and cannot fall off.

In this embodiment, the notch of slag collection groove 14 is provided with rotating brush 26, the outer wall of one end of slag collection groove 14 is provided with a rotating motor for driving rotating brush 26, rotating brush 26 is rotatably arranged at the notch of slag collection groove 14, rotating brush 26 can clean screen structure 15, and rotating brush 26 can brush the particles on screen structure 15 into slag collection groove 14.

The above is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that several variations and modifications can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the utility of the patent.

Claims

1. A biomass boiler low-nitrogen combustion system comprises a combustion furnace main body (1), a tail gas conveying pipe (2), a residue filter (3), an economizer (4) and a tail gas cleaning device (5), and is characterized in that the tail gas cleaning device (5) comprises an atomization cleaning box (6) and a solution adsorption box (7), a partition plate (8) for separating the inner cavity of the atomization cleaning box (6) is vertically arranged at the top of the inner cavity of the atomization cleaning box (6), an atomization nozzle (9) is arranged on one side wall of the atomization cleaning box (6), a gas outlet (10) is arranged on the other side wall of the atomization cleaning box (6), a water outlet (11) is arranged on one side of the bottom wall of the atomization cleaning box (6), a filter screen (12) is arranged at the water outlet (11), a pressure circulating pump (13) capable of communicating the water outlet (11) and the atomization nozzle (9) is arranged on the atomization cleaning box (6), a slag collecting groove (14) is formed in one end of the atomization cleaning box (6), a screen structure (15) capable of sliding towards two ends is arranged at the bottom of the atomization cleaning box (6), and a screen structure driving mechanism (16) is arranged at the other end of the atomization cleaning box (6); the bottom of one side of the solution adsorption tank (7) is provided with an air inlet pipe (17) connected with the air outlet (10), and the top of the other side of the solution adsorption tank (7) is provided with an exhaust pipe (18).

2. A biomass boiler low-nitrogen combustion system according to claim 1, characterized in that the slag collection trough (14) is arranged at the bottom of the atomization cleaning box (6) in a downward and inclined protruding manner, and the screen structure (15) can be adapted to the filter screen (12).

3. The biomass boiler low-nitrogen combustion system as recited in claim 1 or 2, characterized in that the screen structure driving mechanism (16) comprises a screw rod (19), a screw rod nut (20) arranged on the screen structure (15), a guide rod (22) and a screw rod motor device (21) arranged on the outer wall of one end of the atomization cleaning box (6).

4. The biomass boiler low-nitrogen combustion system as recited in claim 3, wherein two vertically arranged guide bars (23) are arranged at two ends of the partition plate (8), scrapers (24) adapted to the side surfaces of the guide bars (23) are slidably arranged on the two guide bars (23), and a push-pull rod (25) hinged with the scrapers (24) is hinged on the screen structure (15).

5. The biomass boiler low-nitrogen combustion system as recited in claim 4, wherein a notch of the slag collecting groove (14) is provided with a rotating brush (26), and an outer wall of one end of the slag collecting groove (14) is provided with a rotating motor for driving the rotating brush (26).