CN212731657U

CN212731657U - Desulfurization and denitrification integrated absorption device

Info

Publication number: CN212731657U
Application number: CN202021304822.6U
Authority: CN
Inventors: 吕大伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-03-19
Anticipated expiration: 2030-07-06

Abstract

The utility model discloses a SOx/NOx control integration absorbing device relates to flue gas treatment facility technical field. The utility model discloses a flue gas advances pipe and limestone slurry case, the flue gas advances the end intercommunication of giving vent to anger of pipe and is provided with the ammonia injection grid in denitration room and the denitration room, the denitration room is kept away from the flue gas and is advanced the one end intercommunication of pipe and be provided with the desulfurizing tower, the below intercommunication of limestone slurry case is provided with the desulfurizing tower circulating pump, the play liquid end intercommunication of desulfurizing tower circulating pump is provided with the spray tube. The utility model discloses a set up desulfurizing tower and denitration room intercommunication, react with the nitrogen oxide in the flue gas via the effect of spraying of ammonia and dilution in the indoor ammonia injection grid of denitration, flue gas is through the desulfurizing tower behind the nitrogen oxide in detaching the flue gas, is adsorbed and reacts by spray tube spun limestone slurry, because this scheme simple structure occupation of land space is less, more is favorable to examination certificate and research equipment the performance when desulfurization and denitration simultaneously.

Description

Desulfurization and denitrification integrated absorption device

Technical Field

The utility model relates to a flue gas treatment facility technical field, concretely relates to SOx/NOx control integration absorbing device.

Background

The flue gas generated by the existing coal-fired biomass boiler contains sulfur, nitrate and smoke dust with different degrees, and a large amount of flue gas causes serious pollution to the atmosphere, so that the treatment of desulfurization, denitration and purification of the flue gas is very important, particularly, along with the strictness of the control standards of nitric oxide and sulfur dioxide, the realization of desulfurization, denitration and dust removal technologies is increasingly emphasized in all aspects.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: for solving the problem that proposes among the above-mentioned background art, the utility model provides a SOx/NOx control integration absorbing device.

The utility model discloses a realize above-mentioned purpose and specifically adopt following technical scheme:

the utility model provides a SOx/NOx control integration absorbing device, advances pipe and limestone slurry case including the flue gas, the flue gas advances the end intercommunication of giving vent to anger of pipe and is provided with the ammonia injection grid in denitration room and the denitration room, the denitration room is kept away from the flue gas and is advanced the one end intercommunication of pipe and be provided with the desulfurizing tower, the below intercommunication of limestone slurry case is provided with the desulfurizing tower circulating pump, the play liquid end intercommunication of desulfurizing tower circulating pump is provided with the hydrojet pipe just the hydrojet end of hydrojet pipe is located the top in the desulfurizing tower, the top intercommunication of desulfurizing tower is provided with the flue gas exit tube.

Further, an electrostatic dust collector is communicated and arranged between the denitration chamber and the desulfurization tower.

Furthermore, an activated carbon plate is fixedly arranged at the air inlet of the electrostatic dust collector and in the denitration chamber.

Further, an induced draft fan is communicated between the electrostatic dust collector and the desulfurizing tower.

Further, still include gypsum thick liquid discharge pump, sedimentation tank and filtrating pump, gypsum thick liquid discharge pump intercommunication sets up in the bottom of desulfurizing tower and the play liquid end setting of gypsum thick liquid discharge pump in the sedimentation tank, the feed liquor end of filtrating pump is linked together and the play liquid end and the setting of limestone slurry case intercommunication of filtrating pump with the clear solution part in the sedimentation tank.

Further, a demister is fixedly arranged at the top in the desulfurizing tower.

The utility model has the advantages as follows: the utility model discloses a set up desulfurizing tower and denitration room intercommunication, nitrogen oxide in the effect of spraying and the flue gas of ammonia is diluted through the ammonia injection grid in the denitration room reacts, flue gas is through the desulfurizing tower behind the nitrogen oxide in detaching the flue gas, adsorb and react by spray line spun limestone slurry, make the flue gas reach the effect of purification through SOx/NOx control simultaneously when discharging, because this scheme simple structure occupation of land space is less, can reduce equipment volume again according to the in-service use demand, more be favorable to examining the performance of evidence and research equipment when desulfurization and denitration simultaneously.

Drawings

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a side view of the structure of the present invention;

FIG. 3 is a sectional view of the structure A-A of the present invention;

FIG. 4 is an enlarged view of the structure at B of the present invention;

reference numerals: 1. a flue gas inlet pipe; 2. a denitration chamber; 3. an ammonia injection grid; 4. an electrostatic precipitator; 5. an induced draft fan; 6. a desulfurizing tower; 7. a limestone slurry tank; 8. a desulfurization tower circulating pump; 9. a liquid spraying pipe; 10. a flue gas outlet pipe; 11. a gypsum slurry discharge pump; 12. a sedimentation tank; 13. a filtrate pump; 14. an activated carbon plate; 15. a demister.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "up", and the like indicate the directions or positional relationships based on the directions or positional relationships shown in the drawings, or the directions or positional relationships that the products of the present invention are conventionally placed when used, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the term refers must have a specific direction, be constructed and operated in a specific direction, and thus, should not be construed as limiting the present invention.

As shown in fig. 1-4, a desulfurization and denitrification integrated absorption device, including flue gas inlet pipe 1 and limestone slurry tank 7, the end intercommunication of giving vent to anger that the flue gas entered pipe 1 is provided with denitration chamber 2 and is provided with ammonia injection grid 3 in the denitration chamber 2, the denitration chamber 2 is kept away from the one end intercommunication that the flue gas entered pipe 1 and is provided with desulfurizing tower 6, the below intercommunication of limestone slurry tank 7 is provided with desulfurizing tower circulating pump 8, the play liquid end intercommunication of desulfurizing tower circulating pump 8 is provided with the hydrojet end of hydrojet pipe 9 and is located the top in desulfurizing tower 6, the top intercommunication of desulfurizing tower 6 is provided with flue gas exit tube 10.

In the embodiment, the mixed ammonia sprayed by the ammonia spraying grid 3 can be obtained by diluting liquid ammonia, the specific introduction mode and method of the mixed ammonia are not limited, wherein the mixed ammonia flows into the branch pipelines through the main pipeline of the ammonia spraying grid 3 and is sprayed out through the nozzles, the surface area flushed by the gas refined by the nozzles is more favorable for the mixing reaction with the matched flue gas, and the number of the ammonia spraying grids 3 can be properly increased or reduced and the length of the denitration chamber 2 can be changed according to the actual use requirement; the flue gas flows into the desulfurization tower 6 after the denitration operation is completed, and the limestone slurry introduced from the desulfurization tower circulating pump 8 is sprayed by the spray pipe 9 to act on the inside of the flue gas (the main component of the limestone slurry is ca (oh))₂) The sulfur dioxide component in the flue gas is absorbed by the alkaline solution after being fully reflected by the flue gas, and finally the flue gas is discharged from the top of the desulfurizing tower 6 to realize the desulfurizing function, other alkaline solvents can be adopted to act on the sulfur dioxide, but for the purposes of realizing better desulfurizing effect and saving cost, gypsum method desulfurization (reaction for generating CaSO) is adopted₄)。

Specifically, an electrostatic dust collector 4 is communicated between the denitration chamber 2 and the desulfurization tower 6.

In this embodiment, need carry out the dust removal operation when the flue gas is discharged, because the heat that the denitration required the flue gas is higher, consequently place the step of flue gas dust removal after the step of denitration, make the flue gas can keep original temperature (also can suitably heat or adopt air heater to balance the temperature of flue gas according to the actual conditions of use) the biggest when getting into denitration room 2, the mode of concrete dust removal adopts electrostatic precipitator 4 to remove dust, need not adopt the great gravity method of area etc. to remove dust the operation, more be favorable to saving the area of equipment, improve dust collection efficiency.

Specifically, an activated carbon plate 14 is fixedly mounted on the air inlet of the electrostatic precipitator 4 and inside the denitration chamber 2.

In this embodiment, the electrostatic precipitator 4 is only suitable for filtering smaller dust particles, but because the combustion process of the boiler is unstable, and the flue gas is often doped with larger particle impurities, the activated carbon plate 14 is arranged in front of the air inlet end of the electrostatic precipitator 4 to adsorb and intercept larger particles in the flue gas, so that the burden of the electrostatic precipitator 4 is reduced, and the normal operation of the dust removal work of the equipment is facilitated.

Specifically, an induced draft fan 5 is communicated between the electrostatic dust collector 4 and the desulfurizing tower 6.

In this embodiment, because ammonia injection grid 3 has been set up in the route of flue gas, electrostatic precipitator 4 and activated carbon plate 14 intercept the flue gas, be unfavorable for the normal circulation of flue gas, consequently, set up the air current effect in the 5 increase flue gas passageways of draught fan, make the flue gas discharge to exhanst gas outlet smoothly, set up draught fan 5 in electrostatic precipitator 4's rear for the drainage effect of reinforcing draught fan 5, electrostatic precipitator 4 is getting rid of the operation that the back more is favorable to draught fan 5 with the dust simultaneously, reduce the number of times that need the plant maintenance, the life of equipment has been increased.

Specifically, still include gypsum thick liquid discharge pump 11, sedimentation tank 12 and filtrate pump 13, gypsum thick liquid discharge pump 11 intercommunication sets up in the bottom of desulfurizing tower 6 and the play liquid end of gypsum thick liquid discharge pump 11 sets up in sedimentation tank 12, and the feed liquor end of filtrate pump 13 is linked together with the clear solution part in sedimentation tank 12 and the play liquid end of filtrate pump 13 and the setting of limestone thick liquid case 7 intercommunication.

In this embodiment, after the slurry is sprayed inside the desulfurization tower 6, the adsorbed slurry is deposited at the bottom of the desulfurization tower 6, the gypsum slurry discharge pump 11 is provided to discharge the solid-liquid mixture (solid component is calcium sulfate) at the bottom, the solid-liquid mixture is discharged to the sedimentation tank 12 and then is allowed to stand, wherein the clear liquid part precipitated in the sedimentation tank 12 can still be used as limestone slurry to desulfurize the flue gas, and the filtrate pump 13 is provided to convey the clear liquid into the limestone slurry tank 7, so that the cyclic utilization of the limestone slurry is realized.

Specifically, a demister 15 is fixedly installed at the top in the desulfurizing tower 6.

In this embodiment, when the limestone slurry inside the desulfurizing tower 6 is sprayed, because the liquid component is muddy calcium hydroxide, the muddy flue gas that produces may be discharged along with the flue gas exit tube 10, influence flue gas purification's effect, consequently catch turbid fog in the below of flue gas exit tube 10 and at the inside fixed mounting defroster 15 of desulfurizing tower 6 (defroster 15 is current structure, specifically is special-shaped board grid structure), do not influence the inside desulfurization operation when flue gas purification effect more is favorable to.

Claims

1. The utility model provides a SOx/NOx control integration absorbing device, its characterized in that advances pipe (1) and limestone slurry case (7) including the flue gas, the flue gas advances the end intercommunication of giving vent to anger of pipe (1) and is provided with ammonia injection grid (3) in denitration room (2) and denitration room (2), denitration room (2) are kept away from the flue gas and are advanced the one end intercommunication of pipe (1) and be provided with desulfurizing tower (6), the below intercommunication of limestone slurry case (7) is provided with desulfurizing tower circulating pump (8), the play liquid end intercommunication of desulfurizing tower circulating pump (8) is provided with hydrojet pipe (9) just the hydrojet end of hydrojet pipe (9) is located the top in desulfurizing tower (6), the top intercommunication of desulfurizing tower (6) is provided with flue gas exit tube (10).

2. The integrated absorption device for desulfurization and denitrification according to claim 1, wherein an electrostatic dust collector (4) is communicated between the denitrification chamber (2) and the desulfurization tower (6).

3. The integrated absorption apparatus for desulfurization and denitrification according to claim 2, wherein the inlet of the electrostatic precipitator (4) is fixedly provided with an activated carbon plate (14) inside the denitrification chamber (2).

4. The integrated absorption device for desulfurization and denitrification according to claim 2, wherein an induced draft fan (5) is communicated between the electrostatic precipitator (4) and the desulfurization tower (6).

5. The integrated absorption device for desulfurization and denitrification according to claim 1, further comprising a gypsum slurry discharge pump (11), a sedimentation tank (12) and a filtrate pump (13), wherein the gypsum slurry discharge pump (11) is communicated with the bottom of the desulfurization tower (6), the liquid outlet end of the gypsum slurry discharge pump (11) is arranged in the sedimentation tank (12), the liquid inlet end of the filtrate pump (13) is communicated with the clear liquid part in the sedimentation tank (12), and the liquid outlet end of the filtrate pump (13) is communicated with the limestone slurry tank (7).

6. The integrated absorption device for desulfurization and denitrification according to claim 1, wherein a demister (15) is fixedly arranged at the top of the desulfurization tower (6).