Ammonia gas absorption tank for ammonia water storage tank and ammonia gas treatment system

Abstract

The utility model belongs to the technical field of ammonia gas treatment, and discloses an ammonia gas absorption tank for an ammonia water storage tank and an ammonia gas treatment system. According to the ammonia gas absorption tank, the water replenishing port is formed in the discharge pipe orifice of the original absorption tank body through the top plate, and the original absorption tank body side water injection mode is detached and replaced. An annular dissipation pipe is arranged in the absorption tank body, a grate is arranged at an emptying opening in the top of the absorption tank body, and an activated carbon layer and a different saddle ring packing layer are arranged on the grate from bottom to top. In addition, the improved ammonia gas absorption tank is used for connecting ammonia gas escaping from the ammonia water storage tank through a pipeline to form a complete new treatment process. Therefore, according to the utility model, the dissipated ammonia gas can be subjected to three times of absorption treatment through the water, the activated carbon layer and the different saddle ring packing layer, so that the effective absorption of the ammonia gas can be realized; meanwhile, discharged ammonia-containing waste liquid and waste acid liquid can be neutralized through the waste acid pool, so that resource recycling is realized, the absorption efficiency of ammonia gas is improved, and the reduction of ammonia gas dissipation is facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of ammonia treatment, and specifically relates to an ammonia absorption tank for an ammonia water storage tank and an ammonia treatment system. Background Art

[0002] As a core industry in the industrial field, the treatment of flue gas generated during the steel production process has always been the focus of environmental protection work. In order to meet increasingly stringent environmental protection requirements, steel companies need to adopt efficient flue gas purification technology. Among them, the activated coke desulfurization and denitrification process is widely used in steel production flue gas treatment due to its high efficiency and stability. This process can effectively remove sulfur oxides and nitrogen oxides in flue gas, thereby reducing its pollution to the atmospheric environment.

[0003] In the activated coke desulfurization and denitrification process, ammonia plays an important role. In the secondary adsorption tower, ammonia participates in the denitrification adsorption reaction and converts nitrogen oxides in the flue gas into harmless substances by chemically reacting with them. At present, the ammonia used for denitrification adsorption in our company is usually purchased from outside and stored in ammonia storage tanks. Especially when the ammonia storage tank is unloaded, the ammonia gas released will pollute the surrounding environment.

[0004] In order to solve the above problems, we set up an ammonia absorption device near the ammonia storage tank. When the ammonia storage tank is unloading, the ammonia discharged from the breathing valve enters the ammonia absorption tank through the escape pipe, and the ammonia escape pipe is inserted into the absorption tank at a distance of 60 cm from the bottom. The ammonia is absorbed by water and then discharged into the atmosphere. However, this absorption device has the problem of low adsorption efficiency in actual application, resulting in odor around the site. In addition, the wastewater that absorbs ammonia is often discharged directly, which not only causes secondary pollution to the environment, but also wastes precious ammonia resources.

[0005] In view of the above problems, it is necessary to improve the existing ammonia absorption device, improve its adsorption efficiency, and explore effective ways to treat wastewater and utilize ammonia resources. Through technological innovation and process optimization, not only can the overall effect of steel production flue gas treatment be improved, but also the effective utilization of resources and sustainable development of the environment can be achieved. Utility Model Content

[0006] In view of the problems existing in the ammonia absorption device in the background technology, we have modified the existing ammonia absorption device, specifically, the escape pipe inside the absorption tank is transformed into an annular escape pipe, and the escape holes are evenly opened on the annular escape pipe to facilitate the full absorption of ammonia and water. At the same time, a spiral plate with a central hole is provided in the emptying pipe at the top of the absorption tank, which is used to place the saddle ring filler, and a grate is placed at the emptying port at the top of the absorption tank, on which activated carbon is placed, thereby forming a double absorption of the saddle ring filler and activated carbon for the exhaust gas discharged after absorption. Finally, the water supply pipe is transformed from the absorption tank to the emptying pipe port and a spray head is added. While replenishing water, the activated carbon is washed and regenerated to restore the initial adsorption capacity. In addition, the ammonia-containing wastewater discharged from the modified ammonia absorption tank is discharged into the waste acid pool to neutralize the waste acid liquid generated by the acid production system, so as to realize the reuse of ammonia resources. Based on the above-mentioned transformation implementation process, the utility model provides an ammonia absorption tank and an ammonia treatment system for an ammonia storage tank.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an ammonia absorption tank for an ammonia water storage tank, comprising an absorption tank body, a discharge pipe is arranged on the top of the absorption tank body, a discharge port is arranged at the lower end of the side of the absorption tank body, a liquid level gauge is arranged on the absorption tank body, an air inlet is arranged in the middle of the side of the absorption tank body, an annular escape pipe connected with the air inlet is arranged inside the absorption tank body, escape holes are evenly opened on the annular escape pipe, a grate is placed at the emptying port on the top of the absorption tank body, an activated carbon layer and an iso-saddle ring filler layer are placed thereon from bottom to top, a top plate is fixedly connected to the discharge pipe port by multiple connecting blocks, and a gap is left between the top plate and the discharge pipe, a water replenishment port is arranged on the top plate, which is used to replenish industrial water into the absorption tank body, the escaped ammonia enters the absorption tank body from the air inlet, is evenly distributed with water through the annular escape pipe for the first absorption, and the exhaust gas discharged after absorption passes through the activated carbon layer and the iso-saddle ring filler layer in turn for two absorptions.

[0008] As a further supplementary explanation of the above-mentioned ammonia absorption tank, a spiral plate with a center hole is fixed inside the discharge pipe, the saddle ring filler layer is filled and arranged on the spiral plate, a spray head is arranged below the top plate, the spray head is connected to the water replenishment port, and the spiral plate is used to increase the contact area between the spray water and the ammonia.

[0009] As a further supplementary explanation of the above-mentioned ammonia absorption tank, an overflow port is provided at the upper end of the side of the absorption tank body, and its position is higher than the air inlet, so as to ensure that the annular escape pipe is below the water level, meet the ammonia absorption conditions while controlling the water level line of water injection.

[0010] As a further supplementary explanation of the above-mentioned ammonia absorption tank, an inspection hole is arranged on the side of the absorption tank body, so that maintenance personnel can enter the absorption tank body to inspect the annular escape pipe.

[0011] An ammonia treatment system includes an ammonia water storage tank, an inlet of the ammonia water storage tank is connected to a discharge pipeline through a discharge manual valve, a discharge pump is arranged on the discharge pipeline to provide power for the transportation of ammonia water, a dissipation port of the ammonia water storage tank is connected to an air inlet of an ammonia absorption tank through a dissipation pipeline, a venting manual valve is arranged on the dissipation port of the ammonia water storage tank, a water replenishment port of the ammonia absorption tank is connected to an industrial water jelly pipe through a water replenishment pipeline, a pneumatic valve is arranged on the water replenishment pipeline, and a discharge port of the ammonia absorption tank is connected to an industrial water jelly pipe through a water replenishment pipeline. A discharge pipe is connected to the ammonia water inlet of the waste acid pool, a first manual emptying valve is arranged on the discharge port of the ammonia absorption tank, the overflow port of the ammonia absorption tank is connected to the first discharge pipe through the overflow pipe, the waste acid inlet of the waste acid pool is connected to the outlet of the acid production system through the waste acid pipe, the discharge port of the waste acid pool is connected to the sewage treatment plant through the second discharge pipe, a second manual emptying valve is arranged on the discharge port of the waste acid pool, and a sewage pump is arranged on the second discharge pipe to provide transportation power for the neutralized waste liquid.

[0012] As a further supplementary explanation of the above-mentioned ammonia treatment system, a flow transmitter is arranged on the overflow pipe, and the flow transmitter forms a chain control with the pneumatic valve through the on-site DCS control system to realize automatic control of water replenishment.

[0013] As a further supplementary explanation of the above-mentioned ammonia treatment system, a check valve is arranged on the overflow pipe to prevent the discharged ammonia-containing water from flowing back and damaging the flow transmitter.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The utility model redesigns and transforms the original ammonia absorption tank, sets a top plate at the discharge pipe mouth, and sets a water replenishment port on the top plate. This design replaces the original sideways water injection method. At the same time, an annular escape pipe is set inside the absorption tank body, and escape holes are evenly opened on the annular escape pipe. This design allows the ammonia entering the absorption tank body to be evenly dispersed and fully contacted with water, thereby improving the absorption efficiency of ammonia. In addition, a grate is set on the top of the absorption tank body, and an activated carbon layer and an isosaddle ring filler layer are placed on it from bottom to top. The activated carbon layer and the isosaddle ring filler layer are added to perform a double absorption design for the absorbed ammonia, further improving the absorption efficiency of ammonia and helping to reduce the escape of ammonia. Therefore, this improvement not only simplifies the operation and improves the work efficiency, but also reduces the risk of ammonia leakage, thereby improving work safety. At the same time, the gap design between the top plate and the discharge pipe helps to evenly distribute the ammonia, so that the contact between the ammonia and the water is more sufficient, and the absorption efficiency of the ammonia is improved.

[0016] 2. The utility model also sets an overflow port on the upper side of the absorption tank, which is higher than the air inlet, so as to ensure that the annular escape pipe is below the water level. This design not only meets the conditions for ammonia absorption, but also controls the water level line of water injection to prevent water overflow, thereby ensuring the safe operation of the equipment.

[0017] 3. The ammonia treatment system of the utility model is connected through a series of pipelines and equipment to form a complete new process for treating ammonia gas escaping from an ammonia water storage tank. This design not only improves the treatment efficiency of ammonia, but also realizes the recycling of wastewater, reduces the treatment cost, and has significant environmental and economic benefits. At the same time, the ammonia treatment system uses a flow transmitter and a pneumatic valve interlocking setting, so that the entire system realizes automatic control of water injection, improves work efficiency, and reduces labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the ammonia absorption tank in the utility model;

[0019] Figure 2 This is a structural diagram of the ammonia absorption tank in the utility model;

[0020] Figure 3 This is the internal structure diagram of the ammonia absorption tank in the utility model;

[0021] Figure 4 This is the structural principle diagram of the ammonia treatment system modified by an ammonia absorption tank.

[0022] In the figure: the absorption tank is 1, the discharge pipe is 2, the discharge port is 3, the overflow port is 4, the air inlet is 5, the grate is 6, the spiral plate is 7, the liquid level gauge is 8, the top plate is 9, the water supply port is 10, the sprinkler head is 11, the annular escape pipe is 12, the escape hole is 13, the activated carbon layer is 14, the saddle ring filler layer is 15, the inspection hole is 16, the ammonia storage tank is 17, the discharge pipe is 18, the discharge pump is 19, the escape The bulk pipe is 20, the water supply pipe is 21, the first discharge pipe is 22, the waste acid tank is 23, the waste acid pipe is 24, the acid making system is 25, the second discharge pipe is 26, the sewage pump is 27, the second manual drain valve is 28, the first manual drain valve is 29, the venting manual valve is 30, the unloading manual valve is 31, the overflow pipe is 32, the flow transmitter is 33, the pneumatic valve is 34, and the check valve is 35. DETAILED DESCRIPTION

[0023] In order to further illustrate the technical solution of the utility model, the following Figures 1 to 4 According to the on-site transformation implementation process, we selected two embodiments of an ammonia absorption tank and an ammonia treatment system to further illustrate the utility model.

[0024] As attached Figures 1 to 3As shown, the structure of the existing ammonia absorption tank includes an absorption tank body 1, a discharge pipe 2 is arranged on the top of the absorption tank body 1, a discharge port 3 is arranged at the lower end of the side of the absorption tank body 1, a liquid level meter 8 is arranged on the absorption tank body 1, an air inlet 5 is arranged in the middle of the side of the absorption tank body 1, and an inspection hole 16 is arranged on the side of the absorption tank body 1 to facilitate maintenance personnel to enter the absorption tank body 1 to inspect the annular escape pipe 12. Embodiment 1

[0025] As attached Figure 2 and 3 As shown, an ammonia absorption tank for an ammonia water storage tank is modified on the basis of the existing ammonia absorption tank, and the main modification process is as follows: a top plate 9 is fixedly connected to the outlet of the discharge pipe 2 through multiple connecting blocks, and a gap is left between the top plate 9 and the discharge pipe 2, and a water replenishment port 10 is provided on the top plate 9 for replenishing industrial water into the absorption tank body 1, and the original side water injection method of the absorption tank body is removed and replaced. In addition, an annular escape pipe 12 connected to the air inlet 5 is provided inside the absorption tank body 1, and escape holes 13 are evenly opened on the annular escape pipe 12. A grate 6 is placed at the emptying port on the top of the absorption tank body 1, and an activated carbon layer 14 and an isosaddle ring filler layer 15 are placed on it from bottom to top. An overflow port 4 is provided at the upper end of the side of the absorption tank body 1, and its position is higher than the air inlet 5, so as to ensure that the annular escape pipe 12 is below the water level, meet the ammonia absorption conditions and control the water level line of water injection.

[0026] In this embodiment, a spiral plate 7 with a hole in the center is fixed inside the discharge pipe 2, the saddle ring filler layer 15 is filled on the spiral plate 7, a spray head 11 is arranged below the top plate 9, the spray head 11 is connected to the water replenishment port 10, and the spiral plate 7 is used to increase the contact area between the spray water and the ammonia gas. Embodiment 2

[0027] As attached Figure 4As shown, an ammonia treatment system includes an ammonia water storage tank 17, a discharge pipe 18 is connected to the inlet of the ammonia water storage tank 17 through a discharge manual valve 31, a discharge pump 19 is arranged on the discharge pipe 18 to provide power for the transportation of ammonia water, the escape port of the ammonia water storage tank 17 is connected to the air inlet 5 of the ammonia absorption tank through the escape pipe 20, a venting manual valve 30 is arranged on the escape port of the ammonia water storage tank 17, the water replenishment port 10 of the ammonia absorption tank is connected to the industrial water mother pipe through the water replenishment pipe 21, a pneumatic valve 34 is arranged on the water replenishment pipe 21, and the discharge port 3 of the ammonia absorption tank is connected to the industrial water mother pipe through the water replenishment pipe 21. The first discharge pipe 22 is connected to the ammonia water inlet of the waste acid tank 23, a first manual emptying valve 29 is arranged on the discharge port 3 of the ammonia absorption tank, the overflow port 4 of the ammonia absorption tank is connected to the first discharge pipe 22 through the overflow pipe 32, the waste acid inlet of the waste acid tank 23 is connected to the outlet of the acid making system 25 through the waste acid pipe 24, the discharge port of the waste acid tank 23 is connected to the sewage treatment plant through the second discharge pipe 26, a second manual emptying valve 28 is arranged on the discharge port of the waste acid tank 23, and a sewage pump 27 is arranged on the second discharge pipe 26 to provide transportation power for the neutralized waste liquid.

[0028] In this embodiment, a check valve 35 is provided on the overflow pipe 32 to prevent the discharged ammonia-containing water from flowing back and damaging the flow transmitter 33 .

[0029] In a preferred implementation manner of the present embodiment, a flow transmitter 33 is provided on the overflow pipe 32, and the flow transmitter 33 forms an interlocking control with the pneumatic valve 34 through the on-site DCS control system to realize automatic control of water replenishment.

[0030] Its working principle: when the unloading pump 19 is started to unload the ammonia water on the tank truck to the ammonia water storage tank 17, the manual venting valve 30 is opened, and the first manual venting valve 29 is closed. The discharged ammonia enters the absorption tank body 1 through the air inlet 5, and is evenly distributed through the annular escape pipe 12 to contact with water for the first absorption. The exhaust gas discharged after absorption passes through the activated carbon layer 14 and the isosaddle ring packing layer 15 for two absorptions, and finally emptied. After continuous use for a period of time, when the ammonia content in the absorption tank body 1 is high, it is necessary to replace the water to ensure the absorption efficiency of ammonia. At this time, we close the manual venting valve 30 and the second manual venting valve 28, and open the first manual venting valve 29 at the same time, and discharge the ammonia-containing wastewater into the waste acid pool 23 to participate in the neutralization reaction with the waste acid liquid. The neutral waste liquid after the reaction is pumped to the sewage treatment plant by the sewage pump 27 for the next step of treatment. During the water injection process, the manual vent valve 30 and the first manual drain valve 29 are closed, and the pneumatic valve 34 is opened at the same time. During the process of injecting industrial water into the absorption tank, the activated carbon is regenerated by spraying water to restore its initial adsorption capacity. When the flow transmitter 33 generates a water flow signal, it means that the water injection level has reached the requirement. The on-site DCS control system controls the pneumatic valve 34 to close and stop water injection.

[0031] The above shows and describes the main features and advantages of the utility model. For those skilled in the art, it is obvious that the specific implementation of the utility model is not limited to the details of the above exemplary embodiments, and the creative ideas and design ideas of the utility model can be realized in other specific forms without departing from the spirit or basic features of the utility model, which should be equivalent to the protection scope disclosed in the technical solution of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims in the utility model.

[0032] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An ammonia absorption tank for an ammonia water storage tank, comprising an absorption tank body (1), a discharge pipe (2) arranged at the top of the absorption tank body (1), a discharge port (3) arranged at the lower end of the side of the absorption tank body (1), and a liquid level meter (8) arranged on the absorption tank body (1), characterized in that: An air inlet (5) is provided in the middle of the side of the absorption tank body (1), an annular escape pipe (12) connected to the air inlet (5) is provided inside the absorption tank body (1), escape holes (13) are evenly provided on the annular escape pipe (12), a grate (6) is placed at the emptying port on the top of the absorption tank body (1), an activated carbon layer (14) and an iso-saddle ring filler layer (15) are placed on the grate from bottom to top, and the grate (6) is fixedly connected at the outlet of the discharge pipe (2) by a plurality of connecting blocks. A top plate (9) is provided, and a gap is left between the top plate (9) and the discharge pipe (2). A water replenishment port (10) is provided on the top plate (9) for replenishing industrial water into the absorption tank body (1). The escaped ammonia gas enters the absorption tank body (1) from the air inlet (5), is evenly distributed through the annular escape pipe (12) and is absorbed by water for the first time. The exhaust gas discharged after absorption passes through the activated carbon layer (14) and the isosaddle ring filler layer (15) in sequence for secondary absorption.

2. The ammonia absorption tank for an ammonia water storage tank according to claim 1, characterized in that: A spiral plate (7) with a hole in the center is fixed inside the discharge pipe (2), the saddle ring filler layer (15) is filled and arranged on the spiral plate (7), a spray head (11) is arranged below the top plate (9), the spray head (11) is connected to the water replenishment port (10), and the spiral plate (7) is used to increase the contact area between the spray water and the ammonia gas.

3. An ammonia absorption tank for an ammonia water storage tank according to claim 1 or 2, characterized in that: An overflow port (4) is provided at the upper side of the absorption tank body (1), and its position is higher than the air inlet (5), so as to ensure that the annular escape pipe (12) is below the water level, thereby meeting the ammonia absorption conditions and controlling the water level line of the water injection.

4. The ammonia absorption tank for an ammonia water storage tank according to claim 3, characterized in that: An inspection hole (16) is provided on the side of the absorption tank body (1) to facilitate maintenance personnel to enter the absorption tank body (1) to inspect the annular escape pipe (12).

5. An ammonia treatment system, comprising an ammonia water storage tank (17), an inlet of the ammonia water storage tank (17) being connected to a discharge pipe (18) via a discharge manual valve (31), and a discharge pump (19) being arranged on the discharge pipe (18) to provide power for the transportation of the ammonia water, characterized in that: The invention comprises an ammonia absorption tank for an ammonia water storage tank as claimed in claim 4, wherein the escape port of the ammonia water storage tank (17) is connected to the air inlet (5) of the ammonia absorption tank through an escape pipe (20), a manual venting valve (30) is arranged on the escape port of the ammonia water storage tank (17), the water replenishment port (10) of the ammonia absorption tank is connected to the industrial water main pipe through a water replenishment pipe (21), a pneumatic valve (34) is arranged on the water replenishment pipe (21), the discharge port (3) of the ammonia absorption tank is connected to the ammonia water inlet of the waste acid tank (23) through a first discharge pipe (22), and a pneumatic valve (34) is arranged on the ammonia absorption tank. A first manual emptying valve (29) is provided on the discharge port (3); the overflow port (4) of the ammonia absorption tank is connected to the first discharge pipe (22) through an overflow pipe (32); the waste acid inlet of the waste acid pool (23) is connected to the outlet of the acid production system (25) through a waste acid pipe (24); the discharge port of the waste acid pool (23) is connected to the sewage treatment plant through a second discharge pipe (26); a second manual emptying valve (28) is provided on the discharge port of the waste acid pool (23); and a sewage pump (27) is provided on the second discharge pipe (26) to provide conveying power for the neutralized waste liquid.

6. An ammonia treatment system according to claim 5, characterized in that: A flow transmitter (33) is provided on the overflow pipe (32), and the flow transmitter (33) forms a chain control with the pneumatic valve (34) through an on-site DCS control system to achieve automatic water replenishment control.

7. An ammonia treatment system according to claim 6, characterized in that: A check valve (35) is provided on the overflow pipe (32) to prevent the discharged ammonia-containing water from flowing back and damaging the flow transmitter (33).

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