Dry regeneration equipment for denitration catalyst

Abstract

The utility model relates to the technical field of environmental protection and chemical industry, and discloses a denitration catalyst dry regeneration device which comprises a honeycomb type catalyst, a double-fluid spray gun is arranged on the top face of the honeycomb type catalyst, and the top end of the double-fluid spray gun is connected with a connecting pipe in a penetrating mode. One end of the connecting pipe is in through connection with a dry ice cleaning machine, a clear water cleaning machine, a steam spraying machine, an acid mist cleaning machine and an activation spraying machine, a gas spraying gun is arranged at the position adjacent to the double-fluid spraying gun, and one end of the gas spraying gun is in through connection with an adapter pipe. According to the dry regeneration equipment for the denitration catalyst, after floating dust is removed, the honeycomb type catalyst is cleaned by the dry ice cleaning machine, then cleaned by the clean water cleaning machine and the steam spraying machine, cleaned by the acid mist cleaning machine and cleaned by the clean water cleaning machine, and then coated with a catalyst active agent, so that the catalyst is recovered and regenerated. The catalyst can be regenerated on site, the amount of waste water generated in the whole process is small, and waste water is not discharged.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection and chemical engineering, in particular to dry regeneration equipment for a denitration catalyst. Background Art

[0002] With increasingly stringent environmental protection requirements, denitrification catalysts are increasingly widely used in coal-fired power plants, industrial boilers and other fields. However, after long-term use, the activity of the catalyst decreases and needs to be regenerated. The traditional wet regeneration process has difficulties such as transportation and wastewater treatment. Therefore, the development of an efficient and environmentally friendly dry regeneration process has important practical significance and application value.

[0003] In the waste SCR denitration catalyst recovery and processing system disclosed in the publication number CN210815294U, the waste SCR denitration catalyst is crushed and deashed, wet-ground, alkaline impurity removed, ultrasonically treated, acidic impurity removed, and then dried, and then pulverized to obtain a carrier powder that can be used for the preparation of SCR denitration catalyst. The utility model solves the problem that the waste SCR denitration catalyst cannot be directly used for the manufacture of SCR denitration catalyst due to its low specific surface area and high content of poisoning elements, and achieves the purpose of reduced utilization.

[0004] However, the waste SCR denitration catalyst recovery and treatment system has the following disadvantages:

[0005] (1) Traditional wet regeneration requires the catalyst to be transported back to a designated regeneration point. The long-distance round-trip transportation results in high catalyst loss, which also limits the catalyst regeneration market. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] The technical problem solved by the utility model is to provide a dry regeneration device for a denitrification catalyst which is highly practical, can be simply operated, and has a relatively simple structure, thereby solving the problems of the traditional wet regeneration mentioned in the above background technology, which requires centralized regeneration, requires round-trip transportation, and also produces wastewater.

[0008] (II) Technical solution

[0009] To achieve the above objectives, the utility model is implemented through the following technical solutions: a dry regeneration device for a denitrification catalyst, comprising a honeycomb catalyst, a dual-fluid spray gun is arranged on the top surface of the honeycomb catalyst, the top end of the dual-fluid spray gun is connected through a connecting pipe, one end of the connecting pipe is respectively connected through a dry ice cleaning machine, a clean water cleaning machine, a steam sprayer, an acid mist cleaning machine and an activation sprayer, a gas spray gun is arranged adjacent to the dual-fluid spray gun, one end of the gas spray gun is connected through a transfer tube, one end of the transfer tube is connected to an air compressor, and the side of the dual-fluid spray gun is connected through a through pipe with a gas spray gun.

[0010] Optionally, the air compressor uses compressed air for cleaning, and the air compressor is used to remove floating dust on the surface of the catalyst.

[0011] Optionally, the dry ice cleaning machine is used for further cleaning to remove oil stains on the catalyst surface.

[0012] Optionally, the steam spray machine is used for cleaning again to clean the sulfates on the surface.

[0013] Optionally, the acid mist cleaning machine performs another cleaning to clean K + 、Na + Alkali metal ions.

[0014] Optionally, the activation sprayer sprays the activation liquid into the interior of the honeycomb catalyst.

[0015] (III) Beneficial effects

[0016] The utility model provides a dry regeneration device for a denitration catalyst, which has the following beneficial effects:

[0017] 1. The dry regeneration equipment of the denitrification catalyst removes floating dust from the honeycomb catalyst, then uses a dry ice cleaning machine to clean it, then uses a clean water cleaning machine and a steam spray machine to clean it, then uses an acid mist cleaning machine to clean it, then uses a clean water cleaning machine to clean it, and then uses a catalyst activator to regenerate the catalyst. The catalyst can be regenerated on site, and the amount of wastewater generated in the whole process is very small, and no wastewater is discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0019] In the figure: 1. Honeycomb catalyst; 2. Connecting pipe; 3. Dry ice cleaning machine; 4. Clean water cleaning machine; 5. Steam spray machine; 6. Acid mist cleaning machine; 7. Activation spray machine; 8. Dual-fluid spray gun; 9. Gas spray gun; 10. Adapter tube; 11. Air compressor; 12. Through pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1 The utility model provides a technical solution: a dry regeneration device for a denitration catalyst, comprising a honeycomb catalyst 1, a double-fluid spray gun 8 is arranged on the top surface of the honeycomb catalyst 1, the top of the double-fluid spray gun 8 is connected through a connecting pipe 2, one end of the connecting pipe 2 is respectively connected through a dry ice cleaning machine 3, a clean water cleaning machine 4, a steam spray machine 5, an acid mist cleaning machine 6 and an activation spray machine 7, a gas spray gun 9 is arranged adjacent to the double-fluid spray gun 8, one end of the gas spray gun 9 is connected through a transfer tube 10, one end of the transfer tube 10 is connected to an air compressor 11, and the side of the double-fluid spray gun 8 is connected through a gas spray gun 9 through a through pipe 12.

[0022] See also Figure 1 The dry ice cleaning machine 3 is provided with dry ice, the clean water cleaning machine 4 is provided with clean water, the steam spray machine 5 is provided with a steam generator and is connected to the clean water cleaning machine 4, the acid mist cleaning machine 6 is provided with an acid solution that can dissolve alkali metal ions, and the activation spray machine 7 is provided with an activation agent that can activate the honeycomb catalyst 1.

[0023] In the utility model, the working steps of the device are as follows:

[0024] First, the air compressor 11 sprays gas through the gas spray gun 9 at one end of the transfer tube 10 to remove dust and impurities attached to the surface of the inactivated honeycomb catalyst 1. The dry ice cleaning machine 3 cleans the surface of the honeycomb catalyst 1 through the dual-fluid spray gun 8 at one end of the connecting tube 2. The honeycomb catalyst 1 after dry ice cleaning is sprayed with hot water through the steam spray machine 5, so that sulfur and ammonia on the surface and deep layers of the honeycomb catalyst 1 can be dissolved and separated. Then, the acid mist cleaning machine 6 sprays acid liquid on the honeycomb catalyst 1 after the above treatment through the dual-fluid spray gun 8 at one end of the connecting tube 2, so that the K on the surface and deep layers of the honeycomb catalyst 1 can be removed. + 、Na + The alkali metal ions are dissolved and separated. Then it is cleaned with a clean water cleaning machine 4. Finally, the activation sprayer 7 sprays the catalyst activation agent onto the surface of the honeycomb catalyst 1 through a dual-fluid spray gun 8 at one end of the connecting pipe 2, so that the active components on the surface of the honeycomb catalyst 1 can be restored. After the honeycomb catalyst 1 is dried in situ, it is loaded into the SCR reactor for use.

[0025] It should be noted that the equipment structure and drawings of the utility model mainly describe the principle of the utility model. In terms of the technology of the design principle, the settings of the power mechanism, power supply system and control system of the device are not fully described. On the premise that the technical personnel in this field understand the principle of the above utility model, the details of the power mechanism, power supply system and control system can be clearly known. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be realized by simple programming by the technical personnel in this field;

[0026] The standard parts used therein can all be purchased from the market and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art, and the structures and principles of the components known to technical personnel in this field can be known by these technical personnel through technical manuals or through conventional experimental methods.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A dry regeneration device for a denitration catalyst, comprising a honeycomb catalyst (1), characterized in that: A dual-fluid spray gun (8) is arranged on the top surface of the honeycomb catalyst (1), the top end of the dual-fluid spray gun (8) is connected to a connecting pipe (2), one end of the connecting pipe (2) is connected to a dry ice cleaning machine (3), a clean water cleaning machine (4), a steam spray machine (5), an acid mist cleaning machine (6) and an activation spray machine (7), respectively, a gas spray gun (9) is arranged adjacent to the dual-fluid spray gun (8), one end of the gas spray gun (9) is connected to a transfer pipe (10), one end of the transfer pipe (10) is connected to an air compressor (11), and the side of the dual-fluid spray gun (8) is connected to the gas spray gun (9) through a through pipe (12).

2. The dry regeneration equipment for a denitration catalyst according to claim 1, characterized in that: The air compressor (11) uses compressed air for cleaning, and the air compressor (11) is used to remove floating dust on the surface of the catalyst.

3. The dry regeneration equipment for a denitration catalyst according to claim 1, characterized in that: The dry ice cleaning machine (3) performs a second cleaning to clean the oil stains on the catalyst surface.

4. The dry regeneration equipment for a denitration catalyst according to claim 1, characterized in that: The steam spray machine (5) performs cleaning again to clean the sulfate on the surface.

5. The dry regeneration equipment for a denitration catalyst according to claim 1, characterized in that: The acid mist cleaning machine (6) performs a second cleaning to clean K + 、Na + Alkali metal ions.

6. The dry regeneration equipment for a denitration catalyst according to claim 1, characterized in that: The activation sprayer (7) sprays and applies the activation liquid to the inside of the honeycomb catalyst (1).

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