Material dissolving device for denitration catalyst production

Abstract

The utility model belongs to the technical field of catalyst production, and particularly relates to a material dissolving device for denitration catalyst production, which comprises a material dissolving tank, the top of the material dissolving tank is connected with an ammonium material storage tank through a pipeline, and a star-shaped discharge valve and a powder flow meter are sequentially arranged on the pipeline between the ammonium material storage tank and the material dissolving tank from top to bottom. The bottom of the material dissolving tank is connected with a material mixing kettle through a vertical pipeline, the middle part of the material dissolving tank is respectively connected with an amine liquid storage tank and a pure water storage tank through pipelines, a pipeline for connecting the bottom of the amine liquid storage tank and the material dissolving tank is provided with a flow meter I, and a pipeline for connecting the bottom of the pure water storage tank and the material dissolving tank is provided with a flow meter II; a nitrogen pipeline is arranged at the top of the material dissolving tank, penetrates through the top of the material dissolving tank and extends to the lower part of the inner side of the material dissolving tank, and a plurality of electric heating rods are arranged in the material dissolving tank. The device can be rapidly heated to a temperature required by reaction, ammonium metavanadate can be dissolved as soon as possible, and the yield of a denitration catalyst is improved; the denaturation of the ammonium metavanadate solution is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of catalyst production, and in particular relates to a material dissolving device for producing denitration catalysts. Background Art

[0002] Currently, the commonly used denitrification catalysts are mainly vanadium-titanium denitrification catalysts. Vanadium-titanium denitrification catalysts are widely used in flue gas denitrification treatment in the steel, electric power, chemical, coking and other industries due to their excellent denitrification selectivity and resistance to poisoning.

[0003] In the process of producing vanadium-titanium denitrification catalyst, ammonium metavanadate is used as the main active component of the catalyst, and molybdenum oxide and tungsten oxide are added as co-catalysts. The method for preparing ammonium metavanadate solution is to heat pure water and monoethanolamine to 80~120℃, and then add ammonium metavanadate to dissolve. Monoethanolamine is toxic, with a flash point of 93.3℃. It is a dangerous chemical reagent that can cause irreversible damage to the human body. Excessive monoethanolamine can irritate the respiratory mucosa, digestive mucosa, eyes and skin, and even cause chemical burns. When monoethanolamine is absorbed by the human body, it can also cause damage to the liver and kidneys. Ammonium metavanadate is toxic and highly oxidizing, which can irritate and damage human skin, eyes, and respiratory tract, and even cause severe chemical burns; at the same time, it can also be toxic to aquatic organisms and cause environmental pollution.

[0004] The production process of denitrification catalysts is prone to environmental pollution and safety hazards due to harsh production conditions and special material properties, and cannot meet its production requirements. Therefore, it is necessary to improve the denitrification catalyst production equipment. The dissolving device in the denitrification catalyst production device is an important part of the production process. The long pipes and multiple elbows used in the dissolving device are prone to cause liquid accumulation or even blockage in the pipes, which reduces the activity of the produced denitrification catalyst. Utility Model Content

[0005] In view of the above deficiencies in the prior art, the technical problem to be solved by the utility model is: to provide a dissolving device for the production of denitrification catalyst, which avoids environmental pollution and safety hazards, and solves the problem that long pipelines and multiple elbows lead to liquid accumulation or even blockage in the pipelines, thereby reducing the activity of the produced denitrification catalyst.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] The utility model discloses a dissolving device for producing a denitration catalyst, comprising a dissolving tank, the top of which is connected to an ammonium material storage tank via a pipeline, a star-shaped discharge valve and a powder flow meter are arranged on the pipeline between the ammonium material storage tank and the dissolving tank from top to bottom, the bottom of the dissolving tank is connected to a mixing kettle via a vertical pipeline, the middle of the dissolving tank is respectively connected to an amine liquid storage tank and a pure water storage tank via pipelines, a flow meter 1 is arranged on the pipeline connecting the bottom of the amine liquid storage tank to the dissolving tank, and a flow meter 2 is arranged on the pipeline connecting the bottom of the pure water storage tank to the dissolving tank; a nitrogen pipeline is arranged on the top of the dissolving tank, the nitrogen pipeline passes through the top of the dissolving tank and extends to the lower part of the inner side of the dissolving tank, and a plurality of electric heating rods are arranged inside the dissolving tank.

[0008] The star-shaped discharge valve can continuously pump ammonium metavanadate into the dissolving tank; flowmeter 1 and flowmeter 2 can monitor the flow of monoethanolamine and pure water in real time; the nitrogen pipeline can stir the materials inside the dissolving tank after the gas is introduced; the electric heating rod can quickly increase the temperature inside the dissolving tank, and can stop heating immediately after the ammonium metavanadate is dissolved to prevent the temperature inside the dissolving tank from being higher than 90°C for a long time.

[0009] in:

[0010] The dissolving tank is provided with a discharge port at the bottom, which is connected to the mixing kettle through a vertical pipeline, and a discharge valve is provided on the vertical pipeline. The ammonium metavanadate solution can directly enter the mixing kettle under the action of gravity through the vertical pipeline.

[0011] The top of the dissolving tank is provided with a feed inlet 3, which is connected to a powder flow meter, a star-shaped discharge valve and an ammonium material storage tank in sequence through a pipeline. The powder flow meter can monitor the flow of ammonium metavanadate.

[0012] The electric heating rod is arranged on the inner wall of the lower part of the dissolving tank.

[0013] A valve 1 is arranged at the bottom of the amine liquid storage tank, a discharge pump 1 is arranged on the pipeline between the valve 1 and the flow meter 1, and the discharge pump 1 is arranged in cooperation with the flow meter 1. The discharge pump 1 can regulate the flow rate of the material according to the data monitored by the flow meter 1.

[0014] The bottom of the pure water storage tank is provided with a valve 2, and a discharge pump 2 is provided on the pipeline between the valve 2 and the flow meter 2, and the discharge pump 2 is provided in cooperation with the flow meter 2. The discharge pump 2 can regulate the flow of the material according to the data monitored by the flow meter 2.

[0015] The ammonium material storage tank and the amine liquid storage tank are both vacuum sealed tanks. The vacuum-set ammonium material storage tank can prevent the ammonium metavanadate powder from escaping, and the vacuum-set amine liquid storage tank can prevent the monoethanolamine from volatilizing.

[0016] A feed port 1 is arranged on the side wall of the dissolving tank, and the amine liquid storage tank is connected with a valve 1, a discharge pump 1, a flow meter 1 and a feed port 1 in sequence through a pipeline.

[0017] A second feed port is arranged on the side wall of the dissolving tank, and the pure water storage tank is connected with a second valve, a second discharge pump, a second flow meter and the second feed port in sequence through a pipeline.

[0018] A viewing mirror is provided on the side wall of the dissolving tank, so as to observe the reaction situation in the dissolving tank.

[0019] The beneficial effects of the utility model are:

[0020] The electric heating rod provided in the utility model can be quickly heated to the temperature required for the reaction and dissolve the ammonium metavanadate as quickly as possible; the vertical pipeline can reduce liquid accumulation and blockage and improve the yield of the denitration catalyst; the temperature can be effectively controlled during the dissolution process, and the dissolved solution can be recovered in time to prevent the ammonium metavanadate solution from being denatured. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] In the figure: 1. Amine liquid storage tank; 2. Pure water storage tank; 3. Dissolved material tank; 4. Ammonium material storage tank; 5. Mixing kettle; 6. Valve one; 7. Discharge pump one; 8. Flow meter one; 9. Star discharge valve; 10. Powder flow meter; 11. Feed inlet one; 12. Feed inlet two; 13. Feed inlet three; 14. Nitrogen pipeline; 15. Electric heating rod; 16. Discharge port; 17. Sight glass; 18. Valve two; 19. Discharge pump two; 20. Flow meter two; 21. Discharge valve. DETAILED DESCRIPTION

[0023] The embodiments of the present utility model are further described below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1 As shown, the dissolving device for denitration catalyst production described in the utility model includes a dissolving tank 3, the top of the dissolving tank 3 is connected to an ammonium material storage tank 4 through a pipeline, a star-shaped unloading valve 9 and a powder flowmeter 10 are arranged on the pipeline between the ammonium material storage tank 4 and the dissolving tank 3 from top to bottom, the bottom of the dissolving tank 3 is connected to a mixing kettle 5 through a vertical pipeline, the middle of the dissolving tank 3 is respectively connected to an amine liquid storage tank 1 and a pure water storage tank 2 through pipelines, a flowmeter 1 8 is arranged on the pipeline connecting the bottom of the amine liquid storage tank 1 to the dissolving tank 3, and a flowmeter 2 20 is arranged on the pipeline connecting the bottom of the pure water storage tank 2 to the dissolving tank 3; a nitrogen pipeline 14 is arranged on the top of the dissolving tank 3, the nitrogen pipeline 14 passes through the top of the dissolving tank 3 and extends to the lower part of the inner side of the dissolving tank 3, and a plurality of electric heating rods 15 are arranged inside the dissolving tank 3.

[0026] The star-shaped discharge valve 9 can continuously pump ammonium metavanadate into the dissolving tank 3; the flow meter 1 8 and the flow meter 2 20 can monitor the flow of monoethanolamine and pure water in real time; the nitrogen pipeline 14 can stir the material inside the dissolving tank 3 after the gas is passed into the nitrogen pipeline 14; the electric heating rod 15 can quickly increase the temperature inside the dissolving tank 3, and can stop heating immediately after the ammonium metavanadate is dissolved to prevent the temperature inside the dissolving tank 3 from being higher than 90°C for a long time.

[0027] The dissolving tank 3 is provided with a discharge port 16 at the bottom thereof, and the discharge port 16 is connected to the mixing kettle 5 through a vertical pipe, and a discharge valve 21 is provided on the vertical pipe. The ammonium metavanadate solution can directly enter the mixing kettle 5 under the action of gravity through the vertical pipe.

[0028] A feed inlet 3 13 is provided at the top of the dissolving tank 3, and the feed inlet 3 13 is connected to the powder flow meter 10, the star discharge valve 9 and the ammonium material storage tank 4 in sequence through a pipeline. The powder flow meter 10 can monitor the flow of ammonium metavanadate.

[0029] The electric heating rod 15 is arranged on the inner wall of the lower part of the dissolving tank 3 .

[0030] A valve 6 is provided at the bottom of the amine liquid storage tank 1, and a discharge pump 7 is provided on the pipeline between the valve 6 and the flow meter 8, and the discharge pump 7 is provided in cooperation with the flow meter 8. The discharge pump 7 can regulate the flow rate of the material according to the data monitored by the flow meter 8.

[0031] A valve 2 18 is provided at the bottom of the pure water storage tank 2, and a discharge pump 2 19 is provided on the pipeline between the valve 2 18 and the flow meter 20, and the discharge pump 2 19 is provided in cooperation with the flow meter 20. The discharge pump 2 19 can regulate the flow of the material according to the data monitored by the flow meter 20.

[0032] The ammonium material storage tank 4 and the amine liquid storage tank 1 are both vacuum sealed tanks. The vacuum-set ammonium material storage tank 4 can prevent the ammonium metavanadate powder from escaping, and the vacuum-set amine liquid storage tank 1 can prevent the monoethanolamine from volatilizing.

[0033] A feed port 11 is provided on the side wall of the dissolving tank 3, and the amine liquid storage tank 1 is connected to a valve 6, a discharge pump 7, a flow meter 8 and the feed port 11 in sequence through a pipeline.

[0034] A second feed port 12 is provided on the side wall of the dissolving tank 3, and the pure water storage tank 2 is connected to a second valve 18, a second discharge pump 19, a second flow meter 20 and the second feed port 12 in sequence through a pipeline.

[0035] A sight glass 17 is provided on the side wall of the dissolving tank 3 so as to observe the reaction situation in the dissolving tank.

[0036] Working principle and process:

[0037] When preparing the ammonium metavanadate solution, first open valve 16 and valve 2 18 to add monoethanolamine and pure water into the dissolving tank 3, and adjust the flow of the discharge pump 17 and the discharge pump 2 19 according to the ratio of monoethanolamine and pure water, use flow meter 18 to monitor the flow of monoethanolamine, and use flow meter 20 to monitor the flow of pure water; then, nitrogen is transported to the bottom of the dissolving tank 3 through the nitrogen pipeline 14 to fully mix the solution in the dissolving tank 3, and the electric heating rod 15 is opened to heat the solution in the dissolving tank 3; after heating to a certain temperature, open the star-shaped discharge valve 9 to continuously add ammonium metavanadate to the dissolving tank 3, and adjust the flow of ammonium metavanadate according to the data monitored by the powder flowmeter 10; when the ammonium metavanadate is fully dissolved, immediately stop the heating of the solution by the electric heating rod 15, and open the discharge valve 21 to quickly transport the obtained ammonium metavanadate solution to the mixing kettle 5 through a vertical pipeline for storage.

Claims

1. A dissolving device for producing a denitration catalyst, comprising a dissolving tank (3), characterized in that: The top of the dissolving tank (3) is connected to an ammonium material storage tank (4) via a pipeline; a star-shaped discharge valve (9) and a powder flow meter (10) are sequentially arranged on the pipeline between the ammonium material storage tank (4) and the dissolving tank (3) from top to bottom; the bottom of the dissolving tank (3) is connected to a mixing kettle (5) via a vertical pipeline; the middle of the dissolving tank (3) is respectively connected to an amine liquid storage tank (1) and a pure water storage tank (2) via pipelines; a flow meter 1 (8) is arranged on the pipeline connecting the bottom of the amine liquid storage tank (1) and the dissolving tank (3); a flow meter 2 (20) is arranged on the pipeline connecting the bottom of the pure water storage tank (2) and the dissolving tank (3); a nitrogen pipeline (14) is arranged on the top of the dissolving tank (3); the nitrogen pipeline (14) passes through the top of the dissolving tank (3) and extends to the lower part of the inner side of the dissolving tank (3); and a plurality of electric heating rods (15) are arranged inside the dissolving tank (3).

2. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: A discharge port (16) is provided at the bottom of the dissolving tank (3), and the discharge port (16) is connected to the mixing kettle (5) via a vertical pipeline, and a discharge valve (21) is provided on the vertical pipeline.

3. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: A third feed port (13) is provided at the top of the dissolving tank (3), and the third feed port (13) is connected to the powder flow meter (10), the star-shaped discharge valve (9) and the ammonium material storage tank (4) in sequence through pipelines.

4. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: The electric heating rod (15) is arranged on the inner wall of the lower part of the dissolving tank (3).

5. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: A valve 1 (6) is provided at the bottom of the amine liquid storage tank (1), and a discharge pump 1 (7) is provided on the pipeline between the valve 1 (6) and the flow meter 1 (8). The discharge pump 1 (7) and the flow meter 1 (8) are arranged in coordination.

6. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: A second valve (18) is provided at the bottom of the pure water storage tank (2), and a second discharge pump (19) is provided on the pipeline between the second valve (18) and the second flow meter (20), and the second discharge pump (19) and the second flow meter (20) are arranged in coordination.

7. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: The ammonium material storage tank (4) and the amine liquid storage tank (1) are both vacuum sealed tanks.

8. The dissolving device for producing denitration catalyst according to claim 5, characterized in that: A feed port 1 (11) is provided on the side wall of the dissolving tank (3), and the amine liquid storage tank (1) is connected to a valve 1 (6), a discharge pump 1 (7), a flow meter 1 (8) and a feed port 1 (11) in sequence through pipelines.

9. The dissolving device for producing denitration catalyst according to claim 6, characterized in that: A second feed port (12) is provided on the side wall of the dissolving tank (3), and the pure water storage tank (2) is connected to a second valve (18), a second discharge pump (19), a second flow meter (20) and the second feed port (12) in sequence through a pipeline.

10. The dissolving device for producing denitration catalyst according to claim 1, characterized in that: A sight glass (17) is provided on the side wall of the dissolving tank (3).

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