Isolation structure of ammonia unloading area of denitration ammonia tank

Abstract

The utility model discloses an isolation structure for an ammonia unloading area of a denitration ammonia tank, which relates to the technical field of denitration ammonia tanks, has the advantage of being capable of collecting ammonia water when the ammonia water storage tank leaks, and is characterized by further comprising a cofferdam wall arranged on the periphery of the ammonia water storage tank, a space for containing leaked ammonia water is formed by the cofferdam wall and the outer wall of the ammonia water storage tank, and a sealing plate is arranged at the upper end of the cofferdam wall and surrounds the ammonia water storage tank by a circle.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia tanks in denitration, in particular to an isolation structure for the ammonia unloading area of a denitration ammonia tank. Background Technique

[0002] In the denitration process, denitration means removing nitrogen oxides contained in flue gas. In the denitration process, denitration reducing agents (commonly used ones include ammonia water, liquid ammonia, urea, etc.) selectively react with NOx in the flue gas to generate nitrogen and water, thereby removing NOx from the flue gas. The injection and mixing of denitration reducing agents are important parts of the whole system. The existing ammonia injection system usually pumps out from an ammonia water storage tank, vaporizes through an evaporator (or other evaporation devices), and then passes through an injection grid arranged on the inlet flue to mix with high-temperature flue gas and enter for denitration reaction, such as the application number 202021286629.4.

[0003] However, once the ammonia water storage tank leaks, it may lead to serious consequences, such as environmental pollution, etc. There is an urgent need for a solution. Therefore, the applicant has developed a new technical solution in the actual production process to solve the above technical problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide an isolation structure for the ammonia unloading area of a denitration ammonia tank, which has the advantage of being able to collect ammonia water when the ammonia water storage tank leaks.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme:

[0006] The utility model provides an isolation structure for the ammonia unloading area of a denitration ammonia tank, including an ammonia water storage tank arranged on the ground, and also including a cofferdam wall arranged around the ammonia water storage tank. The cofferdam wall and the outer wall of the ammonia water storage tank form a space for placing leaked ammonia water. A closing plate is arranged at the upper end of the cofferdam wall, and the closing plate surrounds the outside of the ammonia water storage tank for one week.

[0007] By adopting the above technical scheme, when the ammonia water storage tank leaks, the ammonia water flows out from the ammonia water storage tank and then flows into the space formed by the cofferdam wall and the outer wall of the ammonia water storage tank, collecting the leaked ammonia water and reducing the impact on the environment.

[0008] Preferably, a sunken leakage pool is arranged on the ground. The pool mouth of the leakage pool is closed and extends above the ground. An opening communicating with the leakage pool is arranged on the upper end surface of the leakage pool. A water suction pipe communicating the leakage pool with the cofferdam wall is arranged on the closing plate. The water suction pipe extends downward at the end of the cofferdam wall facing the ammonia water storage tank. And a first water suction pump for pumping the ammonia water between the cofferdam wall and the outer wall of the ammonia water storage tank into the water suction pipe is arranged on the cofferdam wall. The end of the water suction pipe far from the cofferdam wall enters the leakage pool and extends downward at the entering end.

[0009] Preferably, a water return pipe is provided on the leakage pool. One end of the water return pipe extends into the opening and extends downward, and the other end extends into the closed plate and extends upward to the upper end of the ammonia water storage tank and is communicated with the ammonia water storage tank. A second water pump for pumping the ammonia water in the leakage pool into the water return pipe is provided on the inner wall of the leakage pool.

[0010] Preferably, a rectangular frame boss distributed along the periphery of the opening is provided at the upper end of the leakage pool. A cover plate for closing the upper end surface of the boss is provided at the upper end of the boss. Embedding grooves for embedding the water return pipe and the water suction pipe are provided on the boss, and the water return pipe and the water suction pipe are placed side by side.

[0011] Preferably, the cover plate is placed at the upper end of the boss, and a sealing gasket is provided on the side of the cover plate facing the boss.

[0012] Preferably, a long strip-shaped placement groove for placing the water return pipe and the water suction pipe is opened on the ground. When the water return pipe and the water suction pipe are between the cofferdam wall and the leakage pool, they enter the placement groove, and a rigid mesh plate covering the notch of the placement groove is provided on the ground.

[0013] Preferably, an inclined surface for flowing the ammonia water downward to below the opening is provided at the bottom of the leakage pool.

[0014] The beneficial effects of the present utility model are as follows: when the ammonia water storage tank leaks, the ammonia water flows out of the ammonia water storage tank, and then flows into the space formed by the cofferdam wall and the outer wall of the ammonia water storage tank, collecting the leaked ammonia water and reducing the impact on the environment. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 It is a structural schematic diagram of this embodiment;

[0017] Figure 2 It is a structural schematic diagram of this embodiment for embodying the inclined surface;

[0018] Figure 3 It is a structural schematic diagram of this embodiment for embodying the second water pump.

[0019] Explanation of the Reference Numerals in the Drawings:

[0020] In the figure: 1. Ammonia water storage tank; 11. Cofferdam wall; 12. Enclosure plate; 13. Leakage pool; 131. Opening; 14. Water suction pipe; 141. First water suction pump; 15. Water return pipe; 151. Second water suction pump; 152. Boss; 153. Cover plate; 154. Embedded groove; 16. Inclined surface; 2. Ground; 21. Placing groove; 22. Rigid mesh plate. Detailed implementation manners

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] A denitration ammonia tank ammonia unloading area isolation structure, as Figure 1 and Figure 2 , includes an ammonia water storage tank 1 arranged on the ground 2, and further includes a cofferdam wall 11 arranged around the ammonia water storage tank 1. A space for placing leaked ammonia water is formed between the cofferdam wall 11 and the outer wall of the ammonia water storage tank 1, that is, the cofferdam wall 11 surrounds the ammonia water storage tank 1. The longitudinal section of the cofferdam wall 11 is L-shaped, the horizontal part is connected to the outer wall of the bottom of the ammonia water storage tank 1, and an enclosure plate 12 is arranged at the upper end of the cofferdam wall 11. The enclosure plate 12 surrounds the outside of the ammonia water storage tank 1 for one week.

[0023] As Figure 1 and Figure 2 , when the ammonia water storage tank 1 leaks, the ammonia water flows out from the ammonia water storage tank 1, and then flows into the space formed between the cofferdam wall 11 and the outer wall of the ammonia water storage tank 1, so as to collect the leaked ammonia water and reduce the impact on the environment.

[0024] As Figure 1 and Figure 2 , in order to pump the ammonia water in the cofferdam wall 11 back into the ammonia water storage tank 1 again, a sunken leakage pool 13 is arranged on the ground 2. The pool mouth of the leakage pool 13 is closed and extends above the ground 2. An opening 131 communicating with the inside of the leakage pool 13 is opened on the upper end surface of the leakage pool 13. A water suction pipe 14 communicating the leakage pool 13 with the cofferdam wall 11 is arranged on the enclosure plate 12. The water suction pipe 14 extends downward at the end of the cofferdam wall 11 facing the ammonia water storage tank 1, so as to facilitate contacting the ammonia water in the cofferdam wall 11. And a first water suction pump 141 for pumping the ammonia water between the cofferdam wall 11 and the outer wall of the ammonia water storage tank 1 into the water suction pipe 14 is arranged on the cofferdam wall 11. The end of the water suction pipe 14 away from the cofferdam wall 11 enters the leakage pool 13 and extends downward at the entering end. When the first water suction pump 141 works, the ammonia water in the cofferdam wall 11 can be pumped into the leakage pool 13 through the water suction pipe 14 for storage.

[0025] AsFigure 1 and Figure 2 A water return pipe 15 is provided on the leakage pool 13. One end of the water return pipe 15 extends into the opening 131 and extends downward, and the other end extends into the closing plate 12 and extends upward to the upper end of the ammonia water storage tank 1 and is communicated with the ammonia water storage tank 1. A second water pump 151 for pumping the ammonia water in the leakage pool 13 into the water return pipe 15 is provided on the inner wall of the leakage pool 13. When the second water pump 151 works, the ammonia water in the leakage pool 13 is pumped into the ammonia water storage tank 1 through the water return pipe 15, realizing the recycling of the leaked ammonia water; an inclined surface 16 for flowing the ammonia water to the lower part of the opening 131 is provided at the bottom of the leakage pool 13, which is convenient for the water return pipe 15 to pump out the ammonia water in the leakage pool 13. When the water return pipe 15 is working, the staff has already repaired the ammonia water storage tank 1. In order to facilitate professional personnel to access and repair the ammonia water storage tank 1, vertical ladders (not shown in the figure) can be provided on both the closing plate 12 and the outer wall of the ammonia water storage tank 1, and the two ladders can be connected by a horizontal ladder (not shown in the figure).

[0026] As Figure 1 and Figure 3 A rectangular frame boss 152 distributed along the periphery of the opening 131 is provided at the upper end of the leakage pool 13. A cover plate 153 for closing the upper end surface of the boss 152 is provided at the upper end of the boss 152. The setting of the cover plate 153 reduces the pollution of the ammonia water in the leakage pool 13. Embedding grooves 154 for embedding the water return pipe 15 and the water extraction pipe 14 are provided on the boss 152, and the water return pipe 15 and the water extraction pipe 14 are placed side by side. The side-by-side placement of the water return pipe 15 and the water extraction pipe 14 reduces the space occupied by the water return pipe 15 and the water extraction pipe 14, and is convenient for adding and extracting the ammonia water in the leakage pool 13.

[0027] As Figure 1 and Figure 3 The cover plate 153 is placed on the upper end of the boss 152, and a sealing gasket is provided on the side of the cover plate 153 facing the boss 152, further reducing the entry of impurities into the leakage pool 13 from the gap between the cover plate 153 and the boss 152 and reducing the pollution of the ammonia water in the leakage pool 13.

[0028] As Figure 1 and Figure 3 A long strip-shaped placement groove 21 for placing the water return pipe 15 and the water extraction pipe 14 is provided on the ground 2. When the water return pipe 15 and the water extraction pipe 14 are between the cofferdam wall 11 and the leakage pool 13, they enter the placement groove 21. A rigid mesh plate 22 covering the notch of the placement groove 21 is provided on the ground 2. The purpose of this design is to reduce the obstacles caused by the water return pipe 15 and the water extraction pipe 14 to the personnel walking on the ground 2, and once the water return pipe 15 and the water extraction pipe 14 leak, due to the setting of the placement groove 21, the ammonia water can be collected to reduce pollution.

[0029] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and their equivalent technologies, the present utility model also intends to include these modifications and variations.

Claims

1. A denitrification ammonia tank ammonia unloading area isolation structure, comprising an ammonia water storage tank (1) arranged on the ground (2), characterized in that: It also includes a cofferdam wall (11) arranged around the ammonia water storage tank (1), the cofferdam wall (11) and the outer wall of the ammonia water storage tank (1) forming a space for leaked ammonia water to be placed, and a closing plate (12) is provided at the upper end of the cofferdam wall (11), and the closing plate (12) surrounds the outside of the ammonia water storage tank (1).

2. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 1, characterized in that: A sunken leakage pool (13) is provided on the ground (2). The pool mouth of the leakage pool (13) is closed and extends above the ground (2). The upper end surface of the leakage pool (13) is provided with an opening (131) connected to the leakage pool (13). The closing plate (12) is provided with a pumping pipe (14) connecting the leakage pool (13) and the cofferdam wall (11). The pumping pipe (14) extends downward from one end of the cofferdam wall (11) toward the ammonia water storage tank (1). The cofferdam wall (11) is provided with a pumping pump (141) for pumping ammonia water between the cofferdam wall (11) and the outer wall of the ammonia water storage tank (1) into the pumping pipe (14). The pumping pipe (14) enters the leakage pool (13) at one end away from the cofferdam wall (11) and extends downward at the entering end.

3. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 2, characterized in that: A water return pipe (15) is provided on the leakage pool (13), one end of the water return pipe (15) extends into the opening (131) and extends downward, and the other end extends into the closing plate (12) and extends upward to the upper end of the ammonia water storage tank (1) and is connected to the ammonia water storage tank (1). A water pump (151) for pumping ammonia water in the leakage pool (13) into the water return pipe (15) is provided on the inner wall of the leakage pool (13).

4. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 3, characterized in that: The upper end of the leakage pool (13) is provided with a rectangular frame boss (152) distributed along the periphery of the opening (131); the upper end of the boss (152) is provided with a cover plate (153) for closing the upper end surface of the boss (152); the boss (152) is provided with an embedding groove (154) for embedding a water return pipe (15) and a water suction pipe (14); the water return pipe (15) and the water suction pipe (14) are placed side by side.

5. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 4, characterized in that: The cover plate (153) is placed on the upper end of the boss (152), and a sealing gasket is provided on the side of the cover plate (153) facing the boss (152).

6. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 3, characterized in that: A long strip placement groove (21) is provided on the ground (2) for placing the return pipe (15) and the suction pipe (14). The return pipe (15) and the suction pipe (14) enter the placement groove (21) when passing from the cofferdam wall (11) to the leakage pool (13). A rigid mesh plate (22) is provided on the ground (2) to cover the notch of the placement groove (21).

7. The isolation structure of the ammonia unloading area of ​​a denitrification ammonia tank according to claim 3, characterized in that: The bottom of the leakage pool (13) is provided with an inclined surface (16) for directing the ammonia water to flow below the opening (131).

Images