Flue gas denitration and desulfurization device

Abstract

The utility model discloses a flue gas denitration and desulfurization device, which relates to the technical field of flue gas treatment and comprises a treatment tank, a gas inlet pipe fixedly connected to one side of the treatment tank, a liquid storage tank arranged on the other side of the treatment tank, a treatment mechanism connected with the liquid storage tank and a circulating mechanism, the treatment mechanism comprises a conveying pump which is fixedly connected to the outer side wall of the liquid storage tank and an atomizing nozzle which is arranged in the treatment tank and is used for spraying an alkaline solution; the circulating mechanism comprises a communicating pipe fixedly connected to the outer side wall of the treatment tank and a baffle fixedly connected to the inner side wall of the liquid storage tank and used for dividing the interior of the liquid storage tank into a liquid conveying area and a filtering area. According to the flue gas denitration and desulfurization device disclosed by the utility model, the circulating time of flue gas in the drying box is prolonged by arranging a plurality of groups of partition plates, so that the drying effect of a drying agent in the drying box on the flue gas is further improved, and the utilization rate of an alkaline solution is improved by internal circulation of the alkaline solution in the treatment tank and the liquid storage box.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas treatment, and particularly relates to a flue gas denitration and desulfurization device. Background Art

[0002] Flue gas is a mixture of gas and soot, and is the main cause of polluting the atmosphere in residential areas. Flue gas contains a large amount of nitrogen oxides and sulfur oxides. Flue gas desulfurization and denitration technology is a boiler flue gas purification technology applied to the chemical industry with the generation of multi-nitrogen oxides and sulfur oxides. In order to prevent environmental damage, flue gas needs to be filtered using a desulfurization and denitration device.

[0003] Existing treatment methods generally use a certain washing liquid to wash the flue gas generated by industrial production. The process gas is in direct contact with an alkali solution or slurry, and at least a part of the pollutants in the process gas are captured in the alkali solution or slurry; and the process gas depleted of pollutants is in direct contact with a coolant to form a cooled process gas; wherein the alkali solution or slurry is separated from the coolant. Particulate matter, sulfur dioxide, nitrogen oxides, and some other harmful substances soluble in the washing liquid in the flue gas are removed, and the temperature of the flue gas is reduced, so as to achieve the purpose of controlling flue gas pollutants and preventing environmental pollution.

[0004] In the existing flue gas washing device, after the alkali solution comes into contact with the industrial waste gas, the alkali solution is directly discharged, and the alkali solution cannot be reused, resulting in waste, increasing the treatment cost of industrial waste gas, and a part of the alkali solution is carried by the flue gas and transported into the air during the discharge process, thus polluting the air. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a flue gas denitration and desulfurization device, which solves the problem that after the alkali solution comes into contact with the industrial waste gas, the alkali solution is directly discharged and cannot be reused, resulting in waste and increasing the treatment cost of industrial waste gas by setting a circulation mechanism, and solves the problem that a part of the alkali solution is carried by the flue gas and transported into the air during the discharge process, thus polluting the air by setting a treatment mechanism.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A flue gas denitration and desulfurization device includes a treatment tank, an air inlet pipe fixedly connected to one side of the treatment tank, and a liquid storage tank arranged on the other side of the treatment tank, and further includes a treatment mechanism and a circulation mechanism connected to the liquid storage tank;

[0008] The treatment mechanism includes a delivery pump fixedly connected to the outer side wall of the liquid storage tank, and an atomizing nozzle arranged inside the treatment tank for spraying the alkali solution;

[0009] The circulation mechanism includes a connecting pipe fixedly connected to the outer side wall of the treatment tank and a baffle fixedly connected to the inner side wall of the liquid storage tank for dividing the interior of the liquid storage tank into an infusion area and a filtration area.

[0010] Preferably, the treatment mechanism further includes a feeding pipe fixedly connected to the inner side wall of the treatment tank, and the interior of the feeding pipe is communicated with the discharge port of the delivery pump through a pipeline;

[0011] The atomizing nozzle is fixedly connected to the bottom of the feeding pipe.

[0012] Preferably, the treatment mechanism further includes a drying box fixedly connected to the top of the treatment tank, a partition fixedly connected to the opposite inner side walls of the drying box, and a desiccant filled inside the drying box.

[0013] Preferably, the treatment mechanism further includes a straight pipe fixedly connected to the top of the treatment tank for communicating the treatment tank with the drying box, and a discharge pipe fixedly connected to the top of the drying box, and the discharge pipe is a right-angle pipe.

[0014] Preferably, the circulation mechanism further includes an overflow hole opened on the outer side wall of the baffle, a filter screen arranged inside the liquid storage tank, and a sewage discharge pipe fixedly connected to the outer side wall of the liquid storage tank, and the filter screen is located below the overflow hole.

[0015] Preferably, the circulation mechanism further includes a threaded rod fixedly connected to the top of the filter screen, a sealing plate sleeved on the outer surface of the threaded rod, and a limit bolt and a fixing bolt threadedly connected to the threaded rod.

[0016] Preferably, the circulation mechanism further includes a spring groove opened on the side wall of the liquid storage tank, an electromagnet embedded in the bottom of the spring groove of the liquid storage tank, a connecting spring fixedly connected to the inner side wall of the spring groove, a locking block fixedly connected to the end face of the connecting spring, and a locking groove opened on the outer side wall of the sealing plate.

[0017] Compared with the prior art, the present utility model has the following beneficial effects:

[0018] First, in the present utility model, the flue gas to be treated is conveyed into the interior of the treatment tank through the air inlet pipe, and then the delivery pump is started, so that the alkali solution inside the liquid storage tank is conveyed into the feeding pipe and sprayed into the interior of the treatment tank by the atomizing nozzle, thereby performing denitrification and desulfurization treatment on the flue gas. The treated flue gas will enter the interior of the drying box through the straight pipe, and the desiccant inside it will remove the alkali solution carried in the flue gas, and finally the dried flue gas will be discharged into the air through the discharge pipe.

[0019] Second, in the present utility model, the alkali solution inside the treatment tank is transported to the filtration area inside the liquid storage tank through the connecting pipe until the alkali solution enters the liquid infusion area through the overflow hole. During this process, the alkali solution will first pass through the filter screen for filtration to prevent impurities carried by the alkali solution from clogging the delivery pump. At this time, the alkali solution will circulate inside the treatment tank and the liquid storage tank, improving the utilization rate of the alkali solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0021] Figure 2 is a front structural schematic diagram of the present utility model;

[0022] Figure 3 is a top structural schematic diagram of the present utility model;

[0023] Figure 4 is an internal structural schematic diagram of the present utility model;

[0024] Figure 5 is the present utility model Figure 4 enlarged schematic diagram of structure A.

[0025] In the figure: 1, treatment tank; 2, intake pipe; 3, liquid storage tank; 401, delivery pump; 402, feed pipe; 403, atomizing nozzle; 404, drying oven; 405, partition board; 406, desiccant; 407, discharge pipe; 501, connecting pipe; 502, baffle; 503, overflow hole; 504, filter screen; 505, threaded rod; 506, sealing plate; 507, limit bolt; 508, fixing bolt; 509, electromagnet; 5010, connecting spring; 5011, locking block; 5012, sewage discharge pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] In order to make the technical means, creative features, achieved purposes and effects of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0027] Embodiment 1: As Figures 1-5 shown, a flue gas denitrification and desulfurization device includes a treatment tank 1, an intake pipe 2 fixedly connected to one side of the treatment tank 1, and a liquid storage tank 3 arranged on the other side of the treatment tank 1. It also includes a treatment mechanism and a circulation mechanism connected to the liquid storage tank 3;

[0028] The treatment mechanism includes a delivery pump 401 fixedly connected to the outer side wall of the liquid storage tank 3, and an atomizing nozzle 403 arranged inside the treatment tank 1 for spraying alkali solution;

[0029] The circulation mechanism includes a communicating pipe 501 fixedly connected to the outer side wall of the treatment tank 1, and a baffle 502 fixedly connected to the inner side wall of the liquid storage tank 3 for dividing the interior of the liquid storage tank 3 into an infusion area and a filtration area.

[0030] The treatment mechanism further includes a feed pipe 402 fixedly connected to the inner side wall of the treatment tank 1, and the interior of the feed pipe 402 is connected to the discharge port of the delivery pump 401 through a pipeline;

[0031] The atomizing nozzle 403 is fixedly connected to the bottom of the feed pipe 402. The number of atomizing nozzles 403 is several and they are linearly distributed at equal intervals. The feed port of the delivery pump 401 is connected to the infusion area inside the liquid storage tank 3 through a pipeline. The alkali solution inside the liquid storage tank 3 is transported to the feed pipe 402 by the delivery pump 401 and is sprayed into the interior of the treatment tank 1 by the atomizing nozzle 403.

[0032] The treatment mechanism further includes a drying box 404 fixedly connected to the top of the treatment tank 1, a partition 405 fixedly connected to the opposite inner side walls of the drying box 404, and a desiccant 406 filled inside the drying box 404. The number of partitions 405 is several and they are staggered on the upper and lower inner side walls of the drying box 404.

[0033] The treatment mechanism further includes a straight pipe fixedly connected to the top of the treatment tank 1 for connecting the treatment tank 1 and the drying box 404, and a discharge pipe 407 fixedly connected to the top of the drying box 404. The discharge pipe 407 is a right-angle pipe. The straight pipe and the discharge pipe 407 are respectively located at opposite corners of the drying box 404, and multiple groups of partitions 405 are provided to extend the flow time of the flue gas inside the drying box 404, thereby improving the drying effect on the flue gas.

[0034] The flue gas to be treated is transported into the interior of the treatment tank 1 through the intake pipe 2, and then the delivery pump 401 is started, so that the alkali solution inside the liquid storage tank 3 is transported to the feed pipe 402 and is sprayed into the interior of the treatment tank 1 by the atomizing nozzle 403, thereby performing denitrification and desulfurization treatment on the flue gas. The treated flue gas will enter the interior of the drying box 404 through the straight pipe, and the desiccant 406 inside it will remove the alkali solution carried in the flue gas. Finally, the dried flue gas is discharged into the air through the discharge pipe 407. The straight pipe and the discharge pipe 407 are respectively located at opposite corners of the drying box 404, and multiple groups of partitions 405 are provided to extend the flow time of the flue gas inside the drying box 404, thereby improving the drying effect on the flue gas.

[0035] Example 2: As Figures 1-5As shown in the figure, a flue gas denitrification and desulfurization device includes a treatment tank 1, an intake pipe 2 fixedly connected to one side of the treatment tank 1, and a liquid storage tank 3 arranged on the other side of the treatment tank 1. It also includes a treatment mechanism and a circulation mechanism connected to the liquid storage tank 3;

[0036] The treatment mechanism includes a delivery pump 401 fixedly connected to the outer wall of the liquid storage tank 3, and an atomizing nozzle 403 arranged inside the treatment tank 1 for spraying alkali solution;

[0037] The circulation mechanism includes a communicating pipe 501 fixedly connected to the outer wall of the treatment tank 1, and a baffle 502 fixedly connected to the inner wall of the liquid storage tank 3 for dividing the interior of the liquid storage tank 3 into an infusion area and a filtration area.

[0038] The circulation mechanism further includes an overflow hole 503 opened on the outer wall of the baffle 502, a filter screen 504 arranged inside the liquid storage tank 3, and a sewage discharge pipe 5012 fixedly connected to the outer wall of the liquid storage tank 3. The filter screen 504 is located below the overflow hole 503. The overflow hole 503 is used to connect the infusion area and the filtration area. The liquid inside the filtration area will be filtered by the filter screen 504 and finally transported to the inside of the infusion area through the overflow hole 503.

[0039] The circulation mechanism further includes a threaded rod 505 fixedly connected to the top of the filter screen 504, a sealing plate 506 sleeved on the outer surface of the threaded rod 505, and a limit bolt 507 and a fixing bolt 508 threadedly connected to the threaded rod 505. The sealing plate 506 is located between the limit bolt 507 and the fixing bolt 508.

[0040] The circulation mechanism further includes a spring groove opened on the side wall of the liquid storage tank 3, an electromagnet 509 embedded in the bottom of the spring groove of the liquid storage tank 3, a connecting spring 5010 fixedly connected to the inner wall of the spring groove, a locking block 5011 fixedly connected to the end face of the connecting spring 5010, and a locking groove opened on the outer wall of the sealing plate 506. The locking block 5011 is made of ferromagnetic material. When the electromagnet 509 is energized and has magnetic force, the electromagnet 509 will adsorb the locking block 5011, making it completely retract into the spring groove and compressing the connecting spring 5010. The longitudinal section of the locking block 5011 matches the longitudinal section of the locking groove.

[0041] During the process of treating the flue gas, the alkali solution inside the treatment tank 1 will be transported to the filtration area inside the liquid storage tank 3 through the communicating pipe 501 until the alkali solution enters the infusion area through the overflow hole 503. During this process, the alkali solution will first be filtered by the filter screen 504 to prevent impurities carried by the alkali solution from clogging the delivery pump 401;

[0042] After being used for a period of time, the electromagnet 509 is energized to make it have magnetic force, so as to adsorb and lock the block 5011, making it completely retract into the inside of the spring groove and compressing the connecting spring 5010. At this time, the sealing plate 506 and the filter screen 504 can be removed. Finally, by removing the fixing bolt 508, it is convenient to clean or replace the filter screen 504.

Claims

1. A flue gas denitrification and desulfurization device, comprising a treatment tank (1), an air intake pipe (2) fixedly connected to one side of the treatment tank (1), and a liquid storage tank (3) arranged on the other side of the treatment tank (1), characterized in that: It also includes a processing mechanism and a circulation mechanism connected to the liquid storage tank (3); The treatment mechanism comprises a delivery pump (401) fixedly connected to the outer wall of the liquid storage tank (3), and an atomizing nozzle (403) arranged inside the treatment tank (1) for spraying the alkaline solution; The circulation mechanism comprises a connecting pipe (501) fixedly connected to the outer wall of the processing tank (1), and a baffle (502) fixedly connected to the inner wall of the liquid storage tank (3) for dividing the interior of the liquid storage tank (3) into a liquid infusion area and a filtration area; The processing mechanism further comprises a material delivery pipe (402) fixedly connected to the inner wall of the processing tank (1), the interior of the material delivery pipe (402) being connected to the discharge port of the delivery pump (401) via a pipeline; The atomizing nozzle (403) is fixedly connected to the bottom of the material conveying pipe (402); The processing mechanism further comprises a drying box (404) fixedly connected to the top of the processing tank (1), a partition (405) fixedly connected to the inner wall opposite to the drying box (404), and a desiccant (406) filled in the drying box (404); The processing mechanism further comprises a straight pipe fixedly connected to the top of the processing tank (1) for connecting the processing tank (1) with the drying box (404), and a discharge pipe (407) fixedly connected to the top of the drying box (404), wherein the discharge pipe (407) is a right-angle pipe; The circulation mechanism further comprises an overflow hole (503) formed on the outer wall of the baffle (502), a filter screen (504) disposed inside the liquid storage tank (3), and a sewage discharge pipe (5012) fixedly connected to the outer wall of the liquid storage tank (3), wherein the filter screen (504) is located below the overflow hole (503); The circulation mechanism further comprises a threaded rod (505) fixedly connected to the top of the filter screen (504), a sealing plate (506) sleeved on the outer surface of the threaded rod (505), and a limiting bolt (507) and a fixing bolt (508) threadedly connected to the threaded rod (505); The circulation mechanism further comprises a spring groove provided in a side wall of the liquid storage tank (3), an electromagnet (509) embedded in the bottom of the spring groove of the liquid storage tank (3), a connecting spring (5010) fixedly connected to the inner side wall of the spring groove, a locking block (5011) fixedly connected to the end face of the connecting spring (5010), and a locking groove provided in the outer side wall of the sealing plate (506).

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