CN113028437A

CN113028437A - Flue gas waste heat recycling device

Info

Publication number: CN113028437A
Application number: CN201911351168.6A
Authority: CN
Inventors: 马勇
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-24
Filing date: 2019-12-24
Publication date: 2021-06-25

Abstract

The invention discloses a flue gas waste heat recycling device, belonging to the technical field of energy conservation and emission reduction, and comprising a desulfurization recovery tank, wherein the top of the inner cavity of the desulfurization recovery tank is provided with an atomized shower nozzle, the top water inlet of the atomized shower nozzle is connected with a spray pipe, the other end of the spray pipe is connected with an ammonia water storage tank, the bottom of the inner cavity of the desulfurization recovery tank is vertically welded with a first partition plate, the inner cavity of the desulfurization recovery tank is transversely provided with a second partition plate, the left side of the second partition plate is welded on the right side wall of the first partition plate, the right side of the second partition plate is welded on the right side wall of the inner cavity of the desulfurization recovery tank, the second partition plate is uniformly provided with through holes, and the right side of the desulfurization recovery tank is respectively connected with a first waste heat conveying pipe and a recovery pipe. Thereby achieving the purposes of energy conservation and emission reduction.

Description

Flue gas waste heat recycling device

Technical Field

The invention relates to the technical field of energy conservation and emission reduction, in particular to a flue gas waste heat recycling device.

Background

Today, the requirements of atmospheric environment are more and more strict, awareness of environmental protection is deeply fixed in the mind of people, flue gas purification and treatment of coal-fired boilers and industrial kilns are very important, the national supply of energy still takes coal as a main source, other energy sources are auxiliary sources, from the perspective of economic application, coal-fired is the most saved industrial energy at present, other energy sources cannot be compared with coal, but sulfur dioxide is inevitably generated in the combustion process of coal, the atmospheric environment is polluted if the sulfur dioxide is randomly discharged, most of the existing means are that flue gas generated by coal-fired is sprayed and desulfurized by using lime water through a desulfurizing tower and then discharged, the sprayed flue gas still has a large amount of heat, the waste of resources is caused, the national call for energy conservation and emission reduction cannot be responded, and therefore, a flue gas waste heat recycling device is provided.

Disclosure of Invention

The invention aims to provide a flue gas waste heat recycling device, which aims to solve the problems that the coal provided in the background art inevitably generates sulfur dioxide in the combustion process, and if the sulfur dioxide is randomly discharged, the atmospheric environment is polluted, most of the existing means are to spray and desulfurize the flue gas generated by the coal through a desulfurizing tower by using lime water and then discharge the flue gas, and the sprayed flue gas still has a large amount of heat, so that the waste of resources is caused, and the national call for energy conservation and emission reduction cannot be responded.

In order to achieve the purpose, the invention provides the following technical scheme: a flue gas waste heat recycling device comprises a desulfurization recovery box, wherein an atomization shower nozzle is arranged at the top of an inner cavity of the desulfurization recovery box, a spray pipe is connected to a water inlet at the top of the atomization shower nozzle, the other end of the spray pipe is connected with an ammonia water storage box, a first partition plate is vertically welded at the bottom of the inner cavity of the desulfurization recovery box, a second partition plate is transversely arranged in the inner cavity of the desulfurization recovery box, the left side of the second partition plate is welded on the right side wall of the first partition plate, the right side of the second partition plate is welded on the right side wall of the inner cavity of the desulfurization recovery box, through holes are uniformly formed in the body of the second partition plate, the right side of the desulfurization recovery box is respectively connected with a first waste heat conveying pipe and a recovery pipe, the first waste heat conveying pipe is positioned above the recovery pipe, the, the other end of second waste heat conveyer pipe is connected with the air heater of taking out, the bottom air intake connection of air heater has the furnace body, first waste heat conveyer pipe middle part is provided with the raw materials preheating cabinet, first waste heat conveyer pipe middle part is the heliciform, the outer wall of raw materials preheating cabinet is hugged closely to first waste heat conveyer pipe heliciform section, the other end of first waste heat conveyer pipe is connected with the flue gas rose box, the even vertical filter screen that is provided with of flue gas rose box inner chamber, flue gas rose box left side gas outlet is connected with the waste heat recovery pipe, the combustion chamber air inlet of furnace body is connected to the waste heat recovery pipe other end.

Preferably, the height of the first partition plate is lower than that of the desulfurization recovery tank.

Preferably, the filter screen is a stainless steel filter screen.

Preferably, the left side of the desulfurization recovery box is hinged with an access door.

Preferably, the top of the inner cavity of the desulfurization recovery box is vertically provided with a baffle, and the horizontal plane at the bottom of the baffle is lower than the lower part of the horizontal plane of the first waste heat conveying pipe.

Preferably, the flow rate of the recovery pipe is less than that of the spray pipe.

Compared with the prior art, the invention has the beneficial effects that: the invention can generate considerable byproducts while desulfurizing to achieve certain economic benefit, and can preheat the raw materials and participate in combustion by utilizing the desulfurized heat flue gas, thereby greatly improving the combustion efficiency and effectively saving energy and reducing emission.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the desulfurization recovery tank of the present invention;

FIG. 3 is a schematic view of the structure of the flue gas filtering box of the present invention.

In the figure: 1. a desulfurization recovery tank; 2. a second waste heat delivery pipe; 3. a furnace body; 4. a heat extraction fan; 5. a waste heat recovery pipe; 6. a filter screen; 7. a flue gas filter box; 8. a first waste heat delivery pipe; 9. a raw material preheating box; 10. an ammonia water storage tank; 11. a shower pipe; 12. an atomizing showerhead; 13. a first separator; 14. a second separator; 15. a through hole; 16. and (7) recovering the pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a flue gas waste heat recycling device comprises a desulfurization recovery box 1, wherein an atomization shower nozzle 12 is arranged at the top of an inner cavity of the desulfurization recovery box 1, a spray pipe 11 is connected with a water inlet at the top of the atomization shower nozzle 12, the other end of the spray pipe 11 is connected with an ammonia water storage box 10, a first partition plate 13 is vertically welded at the bottom of the inner cavity of the desulfurization recovery box 1, a second partition plate 14 is transversely arranged in the inner cavity of the desulfurization recovery box 1, the left side of the second partition plate 14 is welded on the right side wall of the first partition plate 13, the right side of the second partition plate 14 is welded on the right side wall of the inner cavity of the desulfurization recovery box 1, through holes 15 are uniformly formed in the body of the second partition plate 14, a first waste heat conveying pipe 8 and a recovery pipe 16 are respectively connected at the right side of the desulfurization recovery box 1, the first waste heat conveying pipe 8, the other end of second waste heat conveyer pipe 2 is connected with air extractor 4, the bottom air intake connection of air extractor 4 has furnace body 3, first waste heat conveyer pipe 8 middle part is provided with raw materials preheating cabinet 9, first waste heat conveyer pipe 8 middle part is the heliciform, the outer wall of raw materials preheating cabinet 9 is hugged closely to 8 heliciform sections of first waste heat conveyer pipe, the other end of first waste heat conveyer pipe 8 is connected with flue gas rose box 7, the even vertical filter screen 6 that is provided with of flue gas rose box 7 inner chamber, 7 left sides gas outlets of flue gas rose box are connected with waste heat recovery pipe 5, the combustion chamber air inlet of furnace body 3 is connected to the 5 other ends of.

Wherein, first baffle 13 highly is less than the height of desulfurization collection box 1, filter screen 6 is the stainless steel filter screen, 1 left side of desulfurization collection box articulates there is the access door, be convenient for overhaul

desulfurization collection box

1, 1 inner chamber top of desulfurization collection box is provided with the baffle perpendicularly, baffle bottom horizontal plane is less than the below of 8 horizontal planes of first waste heat conveyer pipe, the extension flue gas stops in the time of 1 inner chamber of desulfurization collection box, the velocity of flow of recovery tube 16 is less than the velocity of flow of shower 11, make ammonium sulfate thick liquid level be higher than recovery tube 16, thereby avoid the flue gas to discharge in the recovery tube 16.

The working principle is as follows: when the method is implemented, 28% concentration ammonia water is placed in an ammonia water storage tank 10, when the method is used, flue gas generated by burning coal in a furnace body 3 is pumped out through a heat pumping fan 4 and is conveyed into a desulfurization recovery tank 1 through a second waste heat conveying pipe 2, the ammonia water in the ammonia water storage tank 10 is conveyed into an atomizing shower nozzle 12 through a spraying pipe 11, the flue gas is sprayed by the atomizing shower nozzle 12, the ammonia water reacts with sulfur dioxide in the flue gas to generate ammonium sulfate slurry, the ammonium sulfate slurry is settled to the bottom of an inner cavity of the desulfurization recovery tank 1 through a through hole 15 formed in a second partition plate 14 and is conveyed to a chemical fertilizer plant treatment system through a recovery pipe 16 for further processing to generate a high-added-value ammoniated sulfate fertilizer product, the desulfurized flue gas preheats raw materials placed in a raw material preheating tank 9 through a first waste heat conveying pipe 8 and is conveyed into a flue gas filtering tank 7 through the first waste heat conveying pipe 8, the dust in the flue gas is filtered through the filter screen 6 arranged in the flue gas filter box 7, and the filtered flue gas is conveyed to the furnace body 3 for participating in combustion through mixed air of the waste heat recovery pipe 5 connected to the left air outlet of the flue gas filter box 7, so that the combustion efficiency is improved.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a flue gas waste heat recovery utilizes device, includes desulfurization collection box (1), its characterized in that: the top of the inner cavity of the desulfurization recovery box (1) is provided with an atomization shower nozzle (12), the top water inlet of the atomization shower nozzle (12) is connected with a spray pipe (11), the other end of the spray pipe (11) is connected with an ammonia water storage box (10), the bottom of the inner cavity of the desulfurization recovery box (1) is vertically welded with a first baffle plate (13), the inner cavity of the desulfurization recovery box (1) is transversely provided with a second baffle plate (14), the left side of the second baffle plate (14) is welded on the right side wall of the first baffle plate (13), the right side of the second baffle plate (14) is welded on the right side wall of the inner cavity of the desulfurization recovery box (1), the body of the second baffle plate (14) is uniformly provided with through holes (15), the right side of the desulfurization recovery box (1) is respectively connected with a first waste heat conveying pipe (8) and a recovery pipe (16), and the, the desulfurization recovery box (1) is connected with a second waste heat conveying pipe (2) at the bottom, the second waste heat conveying pipe (2) is located on the left side of a first partition plate (13), the other end of the second waste heat conveying pipe (2) is connected with a heat pumping fan (4), the bottom air inlet of the heat pumping fan (4) is connected with a furnace body (3), a raw material preheating box (9) is arranged at the middle part of the first waste heat conveying pipe (8), the middle part of the first waste heat conveying pipe (8) is spiral, the spiral section of the first waste heat conveying pipe (8) is tightly attached to the outer wall of the raw material preheating box (9), the other end of the first waste heat conveying pipe (8) is connected with a flue gas filtering box (7), a filtering net (6) is uniformly and vertically arranged in the inner cavity of the flue gas filtering box (7), a left air outlet of the, the other end of the waste heat recovery pipe (5) is connected with a combustion chamber air inlet of the furnace body (3).

2. The flue gas waste heat recycling device according to claim 1, characterized in that: the height of the first clapboard (13) is lower than that of the desulfurization recovery box (1).

3. The flue gas waste heat recycling device according to claim 1, characterized in that: the filter screen (6) is a stainless steel filter screen.

4. The flue gas waste heat recycling device according to claim 1, characterized in that: the left side of the desulfurization recovery box (1) is hinged with an access door.

5. The flue gas waste heat recycling device according to claim 1, characterized in that: the top of the inner cavity of the desulfurization recovery box (1) is vertically provided with a baffle, and the horizontal plane at the bottom of the baffle is lower than the lower part of the horizontal plane of the first waste heat conveying pipe (8).

6. The flue gas waste heat recycling device according to claim 1, characterized in that: the flow velocity of the recovery pipe (16) is less than that of the spray pipe (11).