Dust removal, desulfurization and denitrification device for boiler flue gas

Abstract

The utility model provides a dedusting, desulfurization and denitrification device for boiler flue gas, which relates to the technical field of boiler flue gas treatment and comprises a box body, a gas inlet pipe is fixedly connected to the outer surface of the box body close to the bottom, a gas outlet pipe is fixedly connected to the outer surface of the other side of the box body close to the top, and a first filter screen is fixedly connected to the inner surface of the box body; and the collecting assembly is fixedly connected to the inner surface of the box body. According to the flue gas treatment device, when the flue gas is subjected to spraying treatment, treatment liquid sprayed by the atomizing spray head can be discharged from the liquid discharge pipe through communication of the second liquid discharge hopper to be collected, and through cooperative use of the first liquid discharge hopper and the collection box, the flue gas can smoothly rise from the opening position of the first liquid discharge hopper to be treated; the treatment liquid sprayed from the upper part can be intercepted and collected and cannot be directly sprayed to the surface of the first filter screen, so that the cleaning frequency of the first filter screen is effectively reduced, and meanwhile, the waste of the treatment liquid is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler flue gas treatment, in particular to a dust removal, desulfurization and denitrification device for boiler flue gas. Background Art

[0002] Boiler flue gas treatment refers to a series of measures to purify and treat the flue gas generated by boiler combustion to reduce environmental pollution and improve energy efficiency.

[0003] In the prior art, such as Chinese patent CN 219815830 U, a dust removal, desulfurization and denitrification device for boiler flue gas is disclosed, which includes a treatment box, a first rotatable filter cartridge is horizontally arranged on the inner side of the treatment box, and a desulfurizer water tank is arranged on the outer side of the treatment box, and a second filter cartridge is arranged on the inner side of the first filter cartridge. The first filter cartridge and the second filter cartridge filter the dust in the flue gas, and the first filter cartridge arranged in a cylindrical shape has a large filtering area, which can greatly improve the filtering efficiency. At the same time, the continuously rolling first filter cartridge cooperates with the brush rod to realize real-time cleaning thereof, thereby ensuring the normal filtering work of the first filter cartridge, and at the same time, the desulfurizer is evenly sprayed on the outer surface of the first filter cartridge through the spray assembly, and the first filter cartridge discharges the filtered flue gas to the outside over a large area, so that it can better contact and react with the desulfurizer, thereby greatly improving the efficiency of desulfurization and denitrification.

[0004] In the above patent, although the dust removal, desulfurization and denitrification device can improve the efficiency of desulfurization and denitrification, when the device is in operation, a treatment method of physical interception filtration at the bottom combined with spraying treatment liquid at the top is adopted. After the filter intercepts and filters the flue gas, a large amount of dust impurities will adhere to the surface of the filter, and then the treatment liquid above will be sprayed onto the surface of the filter. The treatment liquid and the dust on the surface of the filter will form a viscous liquid after mixing, which will cause the filter to be blocked quickly. The filter needs to be cleaned more frequently, and the treatment liquid cannot be collected and utilized after mixing with the dust, resulting in waste. Utility Model Content

[0005] The purpose of the utility model is to solve the problem in the prior art that after the filter intercepts and filters the flue gas, a large amount of dust impurities will adhere to the surface of the filter, and then the treatment liquid above will be sprayed onto the surface of the filter. The treatment liquid and the dust on the surface of the filter will be mixed to form a viscous liquid, which will quickly cause the filter to be blocked and require more frequent cleaning of the filter. At the same time, the treatment liquid and the dust cannot be collected and utilized after mixing, resulting in waste. A dust removal, desulfurization and denitrification device for boiler flue gas is proposed.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a dust removal, desulfurization and denitrification device for boiler flue gas, comprising: a box body, an air inlet pipe is fixedly connected to the outer surface of the box body near the bottom, an air outlet pipe is fixedly connected to the outer surface of the other side of the box body near the top, and a first filter is fixedly connected to the inner surface of the box body; a collecting component, the collecting component is fixedly connected to the inner surface of the box body, the collecting component comprises a fixed frame and two fixed rods, a first liquid drain hopper is fixedly connected to the bottom of the fixed frame, a collecting box is fixedly connected between the end surfaces of the two fixed rods, and a second liquid drain hopper is fixedly connected to the bottom of the collecting box; a recovery component, the recovery component is fixedly connected to the outer surface of the box body, the recovery component comprises a mounting plate, and a liquid collecting box is fixedly connected to the top of the mounting plate.

[0007] Preferably, the first filter is located at an upper side of the air intake pipe, the collecting box is located at an upper side of the first filter, and the first liquid drain hopper is located at an upper side of the collecting box.

[0008] Preferably, the cross section of the collection box is larger than the cross section of the bottom of the first liquid drain hopper, a drain pipe is fixedly connected to the bottom of the second liquid drain hopper, the end face of the drain pipe passes through the box body and extends to the outside, and the drain pipe matches the position of the liquid collection box.

[0009] Preferably, a second connecting pipe is fixedly connected to the top of the box body, a communicating vessel is fixedly connected to the lower end surface of the second connecting pipe, and a plurality of atomizing nozzles are evenly fixedly connected to the bottom of the communicating vessel.

[0010] Preferably, the atomizing nozzle is connected to the second connecting pipe, and the atomizing nozzle is located on the upper side of the fixing frame.

[0011] Preferably, a liquid pump is fixedly connected to the top of the box body, the liquid pump is communicated with the second connecting pipe, the input end of the liquid pump is fixedly connected to the first connecting pipe, and the end surface of the first connecting pipe is fixedly connected to the liquid storage tank.

[0012] Preferably, a support plate is symmetrically fixedly connected to the bottom of the mounting plate, a second filter screen is fixedly connected to the inner surface of the liquid collecting box, and a drain valve is fixedly connected to the outer surface of the liquid collecting box.

[0013] Compared with the prior art, the advantages and positive effects of the utility model are:

[0014] 1. In the utility model, when the flue gas is subjected to spray treatment, the treatment liquid sprayed from the atomizing nozzle will be discharged from the liquid discharge pipe through the connection of the second liquid discharge hopper for collection. By using the first liquid discharge hopper in conjunction with the collection box, the flue gas can smoothly rise from the opening position of the first liquid discharge hopper for treatment, while the treatment liquid sprayed from above can be intercepted and collected, and will not be directly sprayed onto the surface of the first filter screen, thereby effectively reducing the cleaning frequency of the first filter screen and reducing the waste of the treatment liquid.

[0015] 2. In the utility model, after the treated liquid is collected into the liquid collecting box through the drain pipe, the dust impurities in the treated liquid can be filtered through the setting of the second filter screen, and the filtered treated liquid can be discharged through the drain valve for further utilization, thereby improving the practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a dust removal, desulfurization and denitrification device for boiler flue gas proposed in the utility model;

[0017] Figure 2 This is a cross-sectional view of the box structure of a boiler flue gas dust removal, desulfurization and denitrification device proposed in the utility model;

[0018] Figure 3 The utility model provides a schematic diagram of the structure of a collection component of a boiler flue gas dust removal, desulfurization and denitrification device;

[0019] Figure 4 The utility model provides a schematic structural diagram of a recovery component of a dust removal, desulfurization and denitrification device for boiler flue gas.

[0020] Legend: 1. Box body; 2. Air inlet pipe; 3. Air outlet pipe; 4. First filter screen; 5. Collecting assembly; 501. Fixed frame; 502. Fixed rod; 503. First liquid drain hopper; 504. Collecting box; 505. Second liquid drain hopper; 506. Liquid drain pipe; 6. Recovery assembly; 601. Mounting plate; 602. Support plate; 603. Liquid collecting box; 604. Liquid drain valve; 605. Second filter screen; 7. Liquid storage tank; 8. First connecting pipe; 9. Liquid suction pump; 10. Second connecting pipe; 11. Connecting vessel; 12. Atomizing nozzle. DETAILED DESCRIPTION

[0021] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0023] Embodiment 1, as Figure 1-Figure 4As shown, the utility model provides a dust removal, desulfurization and denitrification device for boiler flue gas, comprising: a box body 1, an air inlet pipe 2 is fixedly connected to the outer surface of the box body 1 near the bottom, an air outlet pipe 3 is fixedly connected to the outer surface of the other side of the box body 1 near the top, and a first filter screen 4 is fixedly connected to the inner surface of the box body 1; a collecting component 5, the collecting component 5 is fixedly connected to the inner surface of the box body 1, the collecting component 5 comprises a fixed frame 501 and two fixed rods 502, a first liquid discharge hopper 503 is fixedly connected to the bottom of the fixed frame 501, a collecting box 504 is fixedly connected between the end surfaces of the two fixed rods 502, and a second liquid discharge hopper 505 is fixedly connected to the bottom of the collecting box 504; a recovery component 6, the recovery component 6 is fixedly connected to the outer surface of the box body 1, the recovery component 6 comprises a mounting plate 601, a liquid collecting box 603 is fixedly connected to the top of the mounting plate 601, the first filter screen 4 is located at the upper side of the air inlet pipe 2, and the collecting box 50 4 is located on the upper side of the first filter screen 4, the first liquid draining hopper 503 is located on the upper side of the collecting box 504, the cross-section of the collecting box 504 is larger than the bottom cross-section of the first liquid draining hopper 503, the bottom of the second liquid draining hopper 505 is fixedly connected with a liquid draining pipe 506, the end face of the liquid draining pipe 506 passes through the box body 1 and extends to the outside, the liquid draining pipe 506 matches the position of the liquid collecting box 603, the top of the box body 1 is fixedly connected with a second connecting pipe 10, the lower end face of the second connecting pipe 10 is fixedly connected with a communicating vessel 11, and the bottom of the communicating vessel 11 is evenly fixedly connected with a plurality of atomizing nozzles 12, the atomizing nozzles 12 are connected with the second connecting pipe 10, and the atomizing nozzles 12 are located on the upper side of the fixed frame 501, the top of the box body 1 is fixedly connected with a liquid pump 9, the liquid pump 9 is connected with the second connecting pipe 10, the input end of the liquid pump 9 is fixedly connected with a first connecting pipe 8, and the end face of the first connecting pipe 8 is fixedly connected with a liquid storage tank 7.

[0024] The effect achieved by the entire embodiment 1 is that the flue gas generated by the operation of the boiler is discharged into the box body 1 through the air inlet pipe 2, and the flue gas entering the box body 1 is intercepted and filtered by the first filter screen 4 and then enters the upper position of the box body 1. The first filter screen 4 can intercept and filter the dust impurities in the flue gas. The liquid pump 9 is started to extract the desulfurization and denitrification treatment liquid stored in the liquid storage tank 7 through the first connecting pipe 8, and then the treatment liquid is sent to the position of the communicating vessel 11 through the second connecting pipe 10. The treatment liquid is sprayed out from the atomizing nozzle 12 to perform desulfurization and denitrification treatment on the flue gas. Then, the flue gas is sent out from the air outlet pipe 3 after the treatment is completed. When the flue gas is sprayed, the treatment liquid sprayed from the atomizing nozzle 12 will enter the first liquid discharge bucket 503, and the treatment liquid entering the first liquid discharge bucket 503 will drip into the collecting box 504. Then the treatment liquid will be discharged from the discharge pipe 506 through the connection of the second liquid discharge bucket 505 for collection. By using the first liquid discharge bucket 503 and the collecting box 504 in coordination, the flue gas can smoothly rise from the opening position of the first liquid discharge bucket 503 for treatment, while the treatment liquid sprayed from the top can be intercepted and collected, and will not be directly sprayed onto the surface of the first filter screen 4, thereby effectively reducing the cleaning frequency of the first filter screen 4 and reducing the waste of treatment liquid.

[0025] Embodiment 2, as Figure 1-Figure 4 As shown, a support plate 602 is symmetrically fixedly connected to the bottom of the mounting plate 601 , a second filter screen 605 is fixedly connected to the inner surface of the liquid collecting box 603 , and a drain valve 604 is fixedly connected to the outer surface of the liquid collecting box 603 .

[0026] The effect achieved by the entire embodiment 2 is that the bearing capacity of the mounting plate 601 can be improved by the setting of the support plate 602. After the treated liquid is collected into the liquid collecting box 603 through the drain pipe 506, the dust impurities in the treated liquid can be filtered through the setting of the second filter screen 605. The filtered treated liquid can be discharged through the drain valve 604 for further utilization, thereby improving the practicability of the device.

[0027] Working principle: the flue gas generated by the operation of the boiler is discharged into the box body 1 through the air inlet pipe 2. The flue gas entering the box body 1 is intercepted and filtered by the first filter screen 4 and then enters the upper position of the box body 1. The first filter screen 4 can intercept and filter the dust impurities in the flue gas. Starting the liquid pump 9 can extract the desulfurization and denitrification treatment liquid stored in the liquid storage tank 7 through the first connecting pipe 8, and then the treatment liquid will be sent to the communicating vessel 11 through the second connecting pipe 10. The treatment liquid is atomized and sprayed from the atomizing nozzle 12 to desulfurize and denitrify the flue gas. After the flue gas is treated, it is sent out from the air outlet pipe 3. When the flue gas is sprayed, the treatment liquid sprayed from the atomizing nozzle 12 will enter the first liquid discharge bucket 503, and the treatment liquid entering the first liquid discharge bucket 503 will drip into the collection box 504, and then the treatment liquid will Through the connection of the second liquid discharge hopper 505, the smoke is discharged from the drain pipe 506 for collection. Through the coordinated use of the first liquid discharge hopper 503 and the collection box 504, the smoke can smoothly rise from the opening position of the first liquid discharge hopper 503 for treatment, while the treatment liquid sprayed from the top can be intercepted and collected, and will not be directly sprayed onto the surface of the first filter 4, thereby effectively reducing the cleaning frequency of the first filter 4 and reducing the waste of treatment liquid. The bearing capacity of the mounting plate 601 can be improved by the arrangement of the support plate 602. After the treatment liquid is collected into the collection box 603 through the drain pipe 506, the dust impurities in the treatment liquid can be filtered through the arrangement of the second filter 605. The filtered treatment liquid can be discharged through the drain valve 604 for further utilization, thereby improving the practicability of the device.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A dust removal, desulfurization and denitrification device for boiler flue gas, characterized in that: include: A box body (1), an air inlet pipe (2) is fixedly connected to an outer surface of the box body (1) near the bottom, an air outlet pipe (3) is fixedly connected to an outer surface of the other side of the box body (1) near the top, and a first filter screen (4) is fixedly connected to an inner surface of the box body (1); A collecting assembly (5), the collecting assembly (5) being fixedly connected to the inner surface of the box body (1), the collecting assembly (5) comprising a fixing frame (501) and two fixing rods (502), a first liquid draining hopper (503) being fixedly connected to the bottom of the fixing frame (501), a collecting box (504) being fixedly connected between the end surfaces of the two fixing rods (502), and a second liquid draining hopper (505) being fixedly connected to the bottom of the collecting box (504); A recovery component (6), the recovery component (6) being fixedly connected to the outer surface of the box body (1), the recovery component (6) comprising a mounting plate (601), the top of the mounting plate (601) being fixedly connected to a liquid collecting box (603).

2. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 1, characterized in that: The first filter screen (4) is located at an upper side of the air intake pipe (2), the collection box (504) is located at an upper side of the first filter screen (4), and the first liquid drain hopper (503) is located at an upper side of the collection box (504).

3. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 1, characterized in that: The cross-section of the collecting box (504) is larger than the cross-section of the bottom of the first liquid drain hopper (503); a liquid drain pipe (506) is fixedly connected to the bottom of the second liquid drain hopper (505); the end face of the liquid drain pipe (506) passes through the box body (1) and extends to the outside; the position of the liquid drain pipe (506) matches that of the liquid collecting box (603).

4. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 1, characterized in that: A second connecting pipe (10) is fixedly connected to the top of the box body (1), a communicating vessel (11) is fixedly connected to the lower end surface of the second connecting pipe (10), and a plurality of atomizing nozzles (12) are evenly fixedly connected to the bottom of the communicating vessel (11).

5. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 4, characterized in that: The atomizing nozzle (12) is connected to the second connecting pipe (10), and the atomizing nozzle (12) is located on the upper side of the fixing frame (501).

6. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 4, characterized in that: A liquid pump (9) is fixedly connected to the top of the box body (1), the liquid pump (9) is connected to the second connecting pipe (10), the input end of the liquid pump (9) is fixedly connected to the first connecting pipe (8), and the end surface of the first connecting pipe (8) is fixedly connected to the liquid storage tank (7).

7. The boiler flue gas dust removal, desulfurization and denitrification device according to claim 1, characterized in that: The bottom of the mounting plate (601) is symmetrically fixedly connected to a support plate (602), the inner surface of the liquid collecting box (603) is fixedly connected to a second filter screen (605), and the outer surface of the liquid collecting box (603) is fixedly connected to a drain valve (604).

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