Flue gas desulfurization, denitrification, purification and dust removal device

Abstract

The utility model discloses a flue gas desulfurization denitration purification dust removal device, which comprises a denitration cylinder, a desulfurization cylinder and a dust removal cylinder, the denitration cylinder, the desulfurization cylinder and the dust removal cylinder are sequentially nested from outside to inside, the top of the dust removal cylinder is provided with a first spray pipe and a flue gas inlet, the bottom of the dust removal cylinder is provided with a first liquid outlet pipe, and the first liquid outlet pipe is provided with a second liquid outlet pipe. A first outlet is formed in the side face of the dust removal cylinder, a second outlet is formed in the side face of the desulfurization cylinder, the second outlet is higher than the first outlet, a feeding port is formed in the top of the desulfurization cylinder, a discharging port is formed in the bottom of the desulfurization cylinder, and a second spraying pipe is arranged on the upper portion of the denitration cylinder. A second liquid outlet pipe is arranged at the bottom of the denitration cylinder, and a flue gas outlet is formed in the side surface of the denitration cylinder. According to the utility model, the reaction temperature during desulfurization and denitrification is increased, and the desulfurization and denitrification reaction efficiency is greatly accelerated.

Description

TECHNICAL FIELD

[0001] The utility model relates to environmental protection technical field, especially a flue gas desulfurization and denitrification purification dust removal device. BACKGROUND

[0002] The flue gas discharged by kiln or boiler combustion contains a certain amount of sulfur oxide and nitrogen oxide, which is an important cause of environmental pollution. The flue gas must be treated by desulfurization and denitrification before being discharged into the atmosphere.

[0003] Patent 201922319294.5 discloses a desulfurization and denitrification dust removal system, which realizes gradual desulfurization and denitrification by sequentially arranging a first purification box, a second purification box and a dust removal box. However, in this scheme, the three are separately arranged and only connected by a pipeline. The temperature of the flue gas decreases once after each process, the heat dissipation rate of the flue gas conduction to the air is fast, and the decrease of the temperature of the flue gas and the desulfurization and denitrification agent is not conducive to the rapid reaction, resulting in a serious decrease of the desulfurization and denitrification efficiency. SUMMARY

[0004] The utility model aims at overcoming the defects of prior art, providing a flue gas desulfurization and denitrification purification dust removal device to solve the problem of low desulfurization and denitrification efficiency in prior art.

[0005] The utility model discloses a flue gas desulfurization and denitrification purification dust removal device, including denitration cylinder, desulfurization cylinder, dust removal cylinder, the denitration cylinder, desulfurization cylinder, dust removal cylinder are nested from outside to inside sequentially, the top of dust removal cylinder is provided with first spray pipe and flue gas inlet, the bottom of dust removal cylinder is provided with first liquid outlet pipe, the side of dust removal cylinder is provided with first outlet, the side of desulfurization cylinder is provided with second outlet, the second outlet is higher than first outlet, the top of desulfurization cylinder is provided with feed inlet, the bottom of desulfurization cylinder is provided with discharge port, the upper portion of denitration cylinder is provided with second spray pipe, the bottom of denitration cylinder is provided with second liquid outlet pipe, the side of denitration cylinder is provided with flue gas outlet.

[0006] Further, a scraping mechanism is arranged in the desulfurization cylinder, which includes a bearing, a gear ring, a gear, a motor and a push plate. The bearing and the gear ring are both sleeved on the upper part of the dust removal cylinder. The gear ring is fixedly connected with the outer ring of the bearing. The motor is fixedly connected above the desulfurization cylinder. The output end of the motor penetrates through the top surface of the desulfurization cylinder and is fixedly connected with the gear. The gear is engagedly connected with the gear ring. The push plate is horizontally arranged and one end thereof is fixedly connected with the outer ring of the bearing.

[0007] Further, a first circulating pump is arranged outside the denitration cylinder. The liquid inlet end of the first circulating pump is communicated with the first liquid outlet pipe. The liquid inlet end of the first circulating pump is communicated with the first spray pipe.

[0008] Further, the denitration cylinder is externally provided with a second circulating pump, the liquid inlet end of the second circulating pump is communicated with the second liquid outlet pipe, and the liquid inlet end of the second circulating pump is communicated with the second spray pipe.

[0009] Further, the denitration cylinder is externally provided with a second circulating pump, the liquid inlet end of the second circulating pump is communicated with the second liquid outlet pipe, and the liquid inlet end of the second circulating pump is communicated with the second spray pipe.

[0010] Further, the denitration cylinder is externally provided with a second circulating pump, the liquid inlet end of the second circulating pump is communicated with the second liquid outlet pipe, and the liquid inlet end of the second circulating pump is communicated with the second spray pipe.

[0011] The utility model has the advantages that: the flue gas is preferentially contacted with the oil film on the inner wall of the dust removal cylinder for dust removal, then enters the desulfurization cylinder for reverse contact reaction with the desulfurizer for desulfurization, and finally enters the denitration cylinder for denitration treatment, thereby sequentially realizing the functions of dust removal, desulfurization and denitration; the dust removal cylinder, the desulfurization cylinder and the denitration cylinder are concentrically arranged, the heat dissipation area is reduced, the heat is simultaneously conducted from the inside to the outside, the reaction temperature during desulfurization and denitration is improved, and the desulfurization and denitration reaction efficiency is greatly accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is the three-dimensional structure schematic diagram of the utility model embodiment;

[0013] Figure 2 is the sectional structure schematic diagram of the utility model embodiment.

[0014] In the drawing, 1, denitration cylinder, 2, desulfurization cylinder, 3, dust removal cylinder, 4, first spray pipe, 5, flue gas inlet, 6, first outlet, 7, second outlet, 8, feed inlet, 9, discharge outlet, 10, first liquid outlet pipe, 11, annular pipe, 12, spray head, 13, second spray pipe, 14, second liquid outlet pipe, 15, first circulating pump, 16, second circulating pump, 17, bearing, 18, gear ring, 19, gear, 20, motor, 21, push plate, 22, elbow, 23, flue gas outlet. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0017] In the description of the present application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "installed", "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those of ordinary skill in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0018] As shown in Figure 2 A flue gas desulfurization and denitrification purification dust removal device, comprising a denitration cylinder 1, a desulfurization cylinder 2, a dust removal cylinder 3, a scraping mechanism, a first circulating pump 15, a second circulating pump 16, the denitration cylinder 1, the desulfurization cylinder 2 and the dust removal cylinder 3 are sequentially nested from outside to inside, the lower part of the dust removal cylinder 3 is completely located in the desulfurization cylinder 2, the denitration cylinder 1, the desulfurization cylinder 2 and the dust removal cylinder 3 share a top plate seal, the top of the dust removal cylinder 3 is provided with a first spray pipe 4 and a flue gas inlet 5, the bottom of the dust removal cylinder 3 is provided with a first liquid outlet pipe 10, a plurality of first outlets 6 are formed on the lower part of the dust removal cylinder 3, the plurality of first outlets 6 are distributed on the dust removal cylinder 3, a second outlet 7 is formed on the upper part of the desulfurization cylinder 2, the second outlet 7 is distributed on the desulfurization cylinder 2, the second outlet 7 is higher than the first outlet 6, a plurality of ridge-shaped bent pipes 22 are installed in the desulfurization cylinder 2, the number of the bent pipes 22 is equal to the number of the first outlets 6, one end of the bent pipe 22 is communicated with the first outlet 6, the bent pipe 22 can avoid the dust collection oil directly entering the desulfurization cylinder 2 through the first outlet 6 in large quantities, and can also avoid the solid desulfurizing agent from entering the dust removal cylinder 3, of course, a filter screen can be additionally provided to further improve the effect.

[0019] The top of the desulfurization cylinder 2 is provided with a feed inlet 8, solid particle desulfurizing agent is added into the desulfurization cylinder 2 through the feed inlet 8, the bottom of the desulfurization cylinder 2 is conical and is provided with a discharge port 9, the scraping mechanism comprises a bearing 17, a gear ring 18, a gear 19, a motor 20 and a push plate 21, the bearing 17 and the gear ring 18 are sleeved on the upper part of the dust removal cylinder 3, the gear ring 18 and the outer ring of the bearing 17 are concentrically welded together, the push plate 21 is horizontally arranged and one end of the push plate 21 is fixedly welded to the outer ring of the bearing 17, the other end of the push plate 21 extends to the inner wall of the desulfurization cylinder 2, the motor 20 is a servo motor, the motor 20 is fixedly connected above the desulfurization cylinder 2, the output end of the motor 20 vertically penetrates the top surface of the desulfurization cylinder 2 and is fixedly connected to the shaft center of the gear 19, and the gear 19 is engagedly connected with the gear ring 18.

[0020] As Figure 1 shown, the second spray pipe 13 is installed on the upper part of the denitration cylinder 1, the annular pipe 11 is arranged in the denitration cylinder 1, the annular pipe 11 is sleeved on the outer part of the desulfurization cylinder 2, a plurality of spray heads 12 are installed on the annular pipe 11, the spray heads 12 are uniformly distributed, the second spray pipe 13 penetrates through the denitration cylinder 1 and is connected with the annular pipe 11 as a main pipeline, the second liquid outlet pipe 14 is installed on the bottom of the denitration cylinder 1, the liquid inlet end of the second circulating pump 16 is connected with the second liquid outlet pipe 14, the liquid inlet end of the second circulating pump 16 is connected with the second spray pipe 13, and the flue gas outlet 23 is arranged on the side of the denitration cylinder 1 and the height of the flue gas outlet 23 is lower than the height of the spray head 12.

[0021] The first spray pipe 4 penetrates through the side wall of the desulfurization cylinder 2, the liquid inlet end of the first circulating pump 15 is connected with the first liquid outlet pipe 10, and the liquid inlet end of the first circulating pump 15 is connected with the first spray pipe 4.

[0022] The utility model discloses a working principle: the waste gas of furnace body is entered into dust removal cylinder 3 through flue gas import, and the oil is sprayed into dust removal cylinder 3 through the first spray pipe 4, and with the flue gas same direction downward movement, in the process, the soot particle is adsorbed on the oil and falls into the bottom and circulates dust collection through the first circulating pump 15, can further remove soot particle through the external installation filter mechanism, improves the cycle number, and the filter mechanism is not installed in the scheme;The flue gas after being adsorbed by the oil enters the desulfurization cylinder 2 through the first outlet 6, and the solid particle desulfurizer is constantly put into the desulfurization cylinder 2 through the top inlet 8, and the flue gas carries out reverse contact desulfurization reaction with the desulfurizer, and finally enters the denitration cylinder 1 through the second outlet 7, and the solid desulfurizer after reaction is discharged through the bottom discharge port 9;Due to the asymmetric setting of the inlet 8 relative to the desulfurization cylinder 2, the solid desulfurizer is locally piled up, after each time feeding, the starting motor 20 drives the gear meshing gear ring to rotate, then drives the bearing 17 and push plate 21 to rotate, and the push plate 21 spreads the piled desulfurizer, avoids the problem that the flue gas reaction is uneven caused by local piling up;The flue gas in the denitration cylinder 1 reacts with the liquid denitration agent sprayed by the second spray pipe 13 and the annular pipe 11, and the liquid denitration agent is circulated under the action of the second circulating pump 16, and the treated soot is discharged through the flue gas outlet 23;The denitration cylinder 1, the desulfurization cylinder 2 and the dust removal cylinder 3 are concentrically nested, and the heat of flue gas is transmitted from inside to outside step by step, not only reduces the heat dissipation area, but also can heat the dust removal oil, the desulfurizer and the denitration agent, and improves the desulfurization and denitration efficiency.

[0023] Although the utility model has carried out the detailed explanation to the foregoing embodiment, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical feature, any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model, should be included in the protection scope of the utility model.

Claims

1. A flue gas desulfurization and denitrification purification dust removal device, characterized in that: The application relates to a flue gas denitration and desulfurization device, which comprises a denitration cylinder (1), a desulfurization cylinder (2) and a dust removal cylinder (3), the denitration cylinder (1), the desulfurization cylinder (2) and the dust removal cylinder (3) are sequentially nested from outside to inside, a first spray pipe (4) and a flue gas inlet (5) are arranged at the top of the dust removal cylinder (3), a first liquid outlet pipe (10) is arranged at the bottom of the dust removal cylinder (3), a first outlet (6) is arranged on the side of the dust removal cylinder (3), a second outlet (7) is arranged on the side of the desulfurization cylinder (2), the second outlet (7) is higher than the first outlet (6), a feeding inlet (8) is arranged at the top of the desulfurization cylinder (2), a discharging outlet (9) is arranged at the bottom of the desulfurization cylinder (2), a second spray pipe (13) is arranged on the upper portion of the denitration cylinder (1), a second liquid outlet pipe (14) is arranged at the bottom of the denitration cylinder (1), and a flue gas outlet (23) is arranged on the side of the denitration cylinder (1).

2. The flue gas desulfurization and denitrification purification and dust removal device according to claim 1, characterized in that: A scraping mechanism is arranged in the desulfurization cylinder (2), the scraping mechanism comprises a bearing (17), a gear ring (18), a gear (19), a motor (20) and a push plate (21), the bearing (17) and the gear ring (18) are both sleeved on the upper portion of the dust removal cylinder (3), the gear ring (18) is fixedly connected with the outer ring of the bearing (17), the motor (20) is fixedly connected above the desulfurization cylinder (2), the output end of the motor (20) penetrates the top surface of the desulfurization cylinder (2) and is fixedly connected with the gear (19), the gear (19) is in meshing connection with the gear ring (18), and the push plate (21) is horizontally arranged and fixedly connected with the outer ring of the bearing (17).

3. The flue gas desulfurization and denitrification purification and dust removal device according to claim 1, characterized in that: A first circulating pump (15) is arranged outside the denitration cylinder (1), the liquid inlet end of the first circulating pump (15) is communicated with the first liquid outlet pipe (10), and the liquid inlet end of the first circulating pump (15) is communicated with the first spray pipe (4).

4. The flue gas desulfurization and denitrification purification and dust removal device according to claim 1, characterized in that: A second circulating pump (16) is arranged outside the denitration cylinder (1), the liquid inlet end of the second circulating pump (16) is communicated with the second liquid outlet pipe (14), and the liquid inlet end of the second circulating pump (16) is communicated with the second spray pipe (13).

5. The flue gas desulfurization and denitrification purification and dust removal device according to claim 1, characterized in that: An annular pipe (11) is arranged in the denitration cylinder (1), the annular pipe (11) is sleeved outside the desulfurization cylinder (2), a plurality of spray heads (12) are arranged on the annular pipe (11), the second spray pipe (13) penetrates the denitration cylinder (1) and is communicated with the annular pipe (11).

6. The flue gas desulfurization and denitrification purification and dust removal device according to claim 1, characterized in that: A ridge-shaped elbow pipe (22) is arranged in the desulfurization cylinder (2), one end of the elbow pipe (22) is communicated with the first outlet (6).

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