Flue gas denitration equipment convenient for improving denitration efficiency

Abstract

The utility model discloses flue gas denitration equipment convenient for improving denitration efficiency, which belongs to the technical field of flue gas treatment equipment and comprises a base and treatment boxes for industrial flue gas denitration, the top of the base is fixed with the bottoms of the two treatment boxes arranged in parallel, one ends of the two treatment boxes are provided with straight pipes extending to the inner bottom walls of the treatment boxes, and the other ends of the two treatment boxes are provided with straight pipes. A partition plate of the same structure as a square plate is welded to the inner wall of the treatment box, two symmetrical through holes facilitating air pressure balance in the treatment box are formed in the position, close to the inner bottom wall of the treatment box, of the partition plate, and a fan used for accelerating primary treatment flue gas circulation is further installed between the two through holes. The output end of the fan abuts against the inner bottom wall of the treatment box through a connected hollow long pipe, and the inner bottom wall of the treatment box is provided with a treatment pipe capable of discharging liquid in a penetrating mode. According to the flue gas denitration device, the flue gas can be denitrated for multiple times and can be circularly treated at the same time, so that the emission of the flue gas which is not thoroughly treated is avoided, and the treatment effect and efficiency of the device are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of flue gas treatment equipment, and in particular, it is a flue gas denitrification equipment that facilitates the improvement of denitrification efficiency. Background Technology

[0002] Flue gas denitrification refers to the reduction of generated NOx to N2, thereby removing NOx from the flue gas. Based on the treatment process, it can be divided into wet denitrification and dry denitrification. Industrial production processes generate large amounts of flue gas containing significant amounts of nitrogen oxides. To protect the environment, it is necessary to treat these nitrogen oxides. However, existing equipment for treating industrial flue gas typically only performs a single treatment. Due to the reduction in the amount of treatment liquid during circulation, the emitted gas still contains nitrogen oxides after this single treatment, resulting in ineffective treatment.

[0003] A search revealed, for example (Authorization Announcement No. CN220861066U), a flue gas denitrification device for improving denitrification efficiency, comprising a denitrification box, a frame connected to the lower side of the denitrification box, casters connected to the four corner supports of the frame's lower side wall, and a denitrification assembly on the upper side wall of the denitrification box. The denitrification assembly includes a steam tank and an ammonia tank connected sequentially from left to right to the upper side wall of the denitrification box. Both the steam tank and the ammonia tank have first conduits connected to their outer walls. A second conduit connected to the lower side of a double-suction pump body is connected to a mist nozzle connected to the inner side wall of the denitrification box. A first pump seat connected to the outer wall of the double-suction pump body is connected to the outer wall of the denitrification box. Flow control components are symmetrically arranged on the left and right outer sides of the denitrification box. This device solves the problem of low denitrification efficiency in existing equipment. However, this device can only treat industrial flue gas once. During the recycling of the flue gas treatment liquid, dilution results in the subsequently treated emissions still containing a significant amount of nitrogen oxides, reducing the device's treatment effect. Utility Model Content

[0004] The purpose of this invention is to provide a flue gas denitrification device that facilitates improved denitrification efficiency, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a flue gas denitrification device that facilitates improved denitrification efficiency, comprising a base and a treatment box for industrial flue gas denitrification. The top of the base is fixed to the bottom of two parallel treatment boxes. One end of each treatment box is provided with a straight pipe extending to the inner bottom wall of the treatment box. The inner wall of the treatment box is welded with a partition plate with a square plate-like structure. The partition plate is provided with two symmetrical through holes near the inner bottom wall of the treatment box to facilitate the balance of air pressure inside the treatment box. A fan for accelerating the circulation of primary treated flue gas is installed between the two through holes. The output end of the fan is connected to the inner bottom wall of the treatment box through a hollow long pipe. The inner bottom wall of the treatment box is provided with a through-type drainage treatment pipe.

[0006] As a preferred embodiment, the other end of the straight pipe penetrates the side wall of the processing box and connects to a hollow circular pipe, with one end of the circular pipe connected to a pipe fitting.

[0007] As a preferred embodiment, the top of the pipe fitting is connected to two symmetrically arranged branch pipes, and the other ends of the two branch pipes are connected to the valve body.

[0008] As a preferred embodiment, the top of the valve body is connected to a valve that can regulate the flue gas inlet and outlet channels, and one side of the valve body is connected to a flue gas pipe that facilitates the input of industrial flue gas.

[0009] As a preferred embodiment, the bottom of the treatment chamber is provided with two filling pipes with opening and closing valves, which can respectively fill the treatment chamber with alkaline liquid for treating flue gas containing nitrogen oxides.

[0010] As a preferred embodiment, the top of the treatment box is also equipped with a smoke exhaust column with a control valve, and the bottom of the smoke exhaust column is connected to the inside of the treatment box.

[0011] As a preferred embodiment, the processing box is divided into a primary processing box and a secondary processing box, which are separated by a partition. Both of them have a material hopper with the same structure as a funnel on their inner bottom wall, and the bottom of the material hopper is connected to the processing pipe.

[0012] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0013] This flue gas denitrification equipment, designed to improve denitrification efficiency, has two parallel treatment boxes fixed to the top of the base. The treatment boxes are connected to a round pipe via a straight pipe, with a pipe connector fixed to one end of the round pipe. The pipe connector is connected to a valve body via a branch pipe. One side of the valve body is connected to a flue gas pipe for transporting industrial waste gas. Under the action of the valve body and the valve, industrial waste gas can be transported to the interior of one of the treatment boxes. After working for a period of time, the flue gas is then transported to the other treatment box under the action of the valve. This allows for the replacement of the alkaline liquid inside the treatment box, ensuring the treatment effect of the flue gas and improving the treatment efficiency of the device.

[0014] This flue gas denitrification equipment, which facilitates improved denitrification efficiency, has a partition welded to the inner wall of the treatment box. Two fans are installed near the top wall of the treatment box to accelerate the circulation of the primary treatment flue gas. Symmetrical through holes are provided on both sides of the fans. The through holes are located inside the partition. When each group of flue gas is transported into the primary treatment box and the secondary treatment box, its outlet is located inside the alkaline liquid, so that the flue gas and the liquid are fully mixed and the treatment effect is accelerated.

[0015] A nitrogen oxide concentration detection sensor is installed on one side of the chamber. The sensor is connected to the working end of the exhaust fan through a microcomputer. When the treatment chamber cannot completely treat the flue gas, it can be transported to another treatment chamber through a connecting pipe. The treated gas is then discharged in the exhaust column with a control valve, which improves the treatment effect of the device.

[0016] This device solves the problem that existing equipment can only treat industrial waste gas once. By implementing multiple treatments and a circulation system, the device's treatment efficiency is improved. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a flue gas denitrification device that facilitates the improvement of denitrification efficiency according to the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the processing box of this utility model;

[0020] Figure 3 For practical purposes Figure 2 Half-section view of the processing box in the AA direction;

[0021] Figure 4 This is a schematic diagram of the structure of the partition of this utility model;

[0022] Figure 5 This is a schematic diagram of the connection between the pipe fitting and the valve body of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Base; 2. Processing box; 3. Round pipe; 4. Pipe joint; 5. Filling pipe; 6. Exhaust column; 7. Exhaust fan; 8. Connecting pipe; 9. Secondary processing box; 10. Gathering hopper; 11. Baffle plate; 12. Primary processing box; 13. Straight pipe; 14. Through hole; 15. Fan; 16. Flue gas pipe; 17. Valve; 18. Valve body; 19. Branch pipe. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0026] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0027] The connection method can be any existing method, such as bonding, welding, or bolting, depending on the actual needs.

[0028] An embodiment of a flue gas denitrification device that facilitates improved denitrification efficiency, such as... Figures 1 to 5 As shown, the system includes a base 1 and a treatment box 2 for industrial flue gas denitrification. The top of the base 1 is fixed to the bottom of two parallel treatment boxes 2. The arrangement of the two treatment boxes 2 not only allows for the transfer of the alkaline liquid used for nitrogen oxide treatment in the treatment box 2 to the other treatment box 2 via a nitrogen oxide concentration sensor and a fan 7 through a connecting pipe 8 when the treatment effect is not good, thus avoiding intermittent flue gas treatment, but also allows both treatment boxes 2 to work simultaneously when the flue gas volume is large, thereby accelerating the delayed treatment efficiency. It is only necessary to shut down one of the treatment boxes 2 when the alkaline liquid is used up to about 80%, and replace the alkaline liquid in time, and use them alternately.

[0029] Alkaline liquids are frequently used, with ammonia and sodium hydroxide being the main components used in this application. To improve the treatment effect on nitrogen oxides, a partition 11 is welded in the middle of the treatment tank 2. The partition 11 divides the interior of the treatment tank 2 into two spaces: a primary treatment tank 12 and a secondary treatment tank 9. The primary treatment tank 12 contains ammonia, which neutralizes nitrogen oxides to produce white smoke. Under the action of the through-hole 14 and the fan 15, the through-hole 14 is used to balance the air pressure inside the primary treatment tank 12 and the secondary treatment tank 9. The long pipe extends into the sodium hydroxide liquid stored in the secondary treatment tank 9, thereby completing the secondary treatment of the flue gas, improving the treatment effect of nitrogen oxides remaining in the flue gas, and enhancing the practicality of the device.

[0030] To facilitate the treatment of the alkaline liquid after use, both the primary treatment tank 12 and the secondary treatment tank 9 are equipped with a material-gathering hopper 10 with a structure similar to a funnel on their inner bottom walls. The function of the material-gathering hopper 10 is to accelerate the discharge rate of the liquid. A through-type treatment pipe with a control valve is provided at the bottom of the treatment tank 2. The treatment pipe is connected to the material-gathering hopper 10, and the other end of the treatment pipe extends through the base 1 to the bottom of the base 1, thereby completing the treatment of the alkaline liquid inside the treatment tank 2. Since the alkaline liquid contains nitrogen fertilizers such as ammonium nitrate and ammonium nitrite after treating nitrogen oxide flue gas, it can be concentrated to produce fertilizers for agricultural production and can be used flexibly.

[0031] One end of each of the two treatment boxes 2 is provided with a straight pipe 13 extending to the bottom wall of the inner wall of the treatment box 2. The other end of the straight pipe 13 passes through the side wall of the treatment box 2 and is connected to a hollow circular pipe 3. One end of the circular pipe 3 is connected to a pipe joint 4. The pipe joint 4 is connected to the valve body 18 through two symmetrically arranged branch pipes 19. The top of the valve body 18 is provided with a valve 17 that is easy to open and close. The valve 17 can control the two branch pipes 19 to work individually or ensure that the two branch pipes 19 work simultaneously, allowing for flexible use. A flue gas pipe 16 is provided on one side of the valve body 18 to facilitate the input of industrial flue gas, making operation convenient.

[0032] To ensure the treatment effect of oxide flue gas inside the treatment chamber 2, an exhaust fan 7 is installed on one side of the treatment chamber 2, and a nitrogen oxide sensor is installed inside the treatment chamber 2. The sensor can detect the nitrogen oxides contained in the air mixed inside the treatment chamber 2 after treatment. In conjunction with the PLC microcomputer installed on one side of the base 1, the exhaust fan 7 and the sensor are linked to complete the suction of flue gas. The output end of the exhaust fan 7 is connected to a connecting pipe 8, which is connected to another set of connecting pipes 19 that do not correspond to this treatment chamber 2. Because the concentration of nitrogen oxides in the air still exceeds the standard after secondary treatment, it can be determined that the alkaline liquid used for treatment inside the treatment chamber 2 is biased towards neutral. Therefore, another treatment chamber 2 is required. The connecting pipes 8 connecting the two treatment chambers 2 are staggered, which improves the treatment effect and efficiency of the device.

[0033] Because the top of the treatment box 2 is equipped with an exhaust pipe 6 with a control valve, if the sensor detects that the concentration of nitrogen oxides is not up to standard, the flue gas cannot be discharged through the exhaust column 6. In conjunction with the exhaust fan 7, the unfinished flue gas inside the treatment box 2 is controlled to be circulated and treated, thereby improving the denitrification effect of the flue gas.

[0034] Both the exhaust fan 7 and the fan 15 are conventional instruments. Their working principles, dimensions, and models are irrelevant to the function of this application, so they will not be described in detail. The control method of this utility model is through a controller. The control circuit of the controller can be implemented by a person skilled in the art through simple programming. The power supply is also common knowledge in the art. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail.

[0035] Working principle

[0036] This flue gas denitrification equipment, which facilitates the improvement of denitrification efficiency, allows the waste gas generated in industrial production to be input into the valve body 18 through the flue gas pipe 16. Under the action of the valve 17, the flue gas is directed into one of the branch pipes 19 and then transported to the inside of the treatment box 2 by the pipe joint 4, the round pipe 3 and the straight pipe 13.

[0037] Because a partition 11 is provided inside the treatment box 2, the partition 11 divides the inside of the treatment box 2 into a primary treatment box 12 and a secondary treatment box 9. Ammonia water and sodium hydroxide are added to the primary treatment box 12 and the secondary treatment box 9 respectively through the injection pipe 5. With the help of the fan 15 and the through hole 14 set on the top of the partition 11, the secondary treatment of the flue gas containing nitrogen oxides is completed.

[0038] Finally, with the help of the exhaust fan 7 and the nitrogen oxide concentration sensor, the flue gas that was not completely treated is transported to another treatment box 2 under the action of the connecting pipe 8. The flue gas is then treated with ammonia and sodium hydroxide, and the treated flue gas is discharged through the exhaust column 6 with a control valve set at the top of the treatment box 2.

[0039] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flue gas denitrification device for improving denitrification efficiency, comprising a base (1) and a treatment box (2) for industrial flue gas denitrification, characterized in that: The top of the base (1) is fixed to the bottom of two parallel processing boxes (2). One end of each of the two processing boxes (2) is provided with a straight pipe (13) extending to the bottom wall of the inner wall of the processing box (2). The inner wall of the processing box (2) is welded with a partition (11) with a square plate-like structure. The partition (11) is provided with two symmetrical through holes (14) near the bottom wall of the inner wall of the processing box (2) to facilitate the balance of air pressure inside the processing box (2). A fan (15) for accelerating the circulation of flue gas in the primary processing is also installed between the two through holes (14). The output end of the fan (15) is connected to the bottom wall of the processing box (2) through a hollow long pipe. The bottom wall of the processing box (2) is provided with a through-type liquid drainage processing pipe.

2. The flue gas denitrification equipment according to claim 1, which facilitates improving denitrification efficiency, is characterized in that: The other end of the straight pipe (13) passes through the side wall of the processing box (2) and is connected to the hollow circular pipe (3). One end of the circular pipe (3) is connected to the pipe joint (4).

3. The flue gas denitrification equipment according to claim 2, which facilitates improving denitrification efficiency, is characterized in that: The top of the pipe joint (4) is connected to two symmetrically arranged branch pipes (19), and the other end of the two branch pipes (19) is connected to the valve body (18).

4. The flue gas denitrification equipment according to claim 3, which facilitates improving denitrification efficiency, is characterized in that: The top of the valve body (18) is connected to a valve (17) that can regulate the flue gas inlet and outlet channels, and a flue gas pipe (16) that facilitates the input of industrial flue gas is connected to one side of the valve body (18).

5. The flue gas denitrification equipment according to claim 1, which facilitates improving denitrification efficiency, is characterized in that: The bottom of the treatment tank (2) is provided with two filling pipes (5) with opening and closing valves. The two filling pipes (5) can respectively fill the treatment tank (2) with alkaline liquid for treating flue gas containing nitrogen oxides.

6. The flue gas denitrification equipment according to claim 5, which facilitates improving denitrification efficiency, is characterized in that: The top of the treatment box (2) is also provided with a smoke exhaust column (6) with a control valve, and the bottom of the smoke exhaust column (6) is connected to the inside of the treatment box (2).

7. A flue gas denitrification device for improving denitrification efficiency according to claim 6, characterized in that: The processing box (2) is divided into a primary processing box (12) and a secondary processing box (9). The primary processing box (12) and the secondary processing box (9) are separated by a partition (11), and both of them have a material hopper (10) with the same structure as a funnel on their inner bottom wall. The bottom of the material hopper (10) is connected to the processing pipe.

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