Waste gas treatment device for molybdenum trioxide roasting rotary kiln

Abstract

The utility model discloses a waste gas treatment device for a molybdenum trioxide roasting rotary kiln, which comprises a heat exchange box, a desulfurization and denitrification tower, a dust removal box, a deacidification tower, a desulfurization and denitrification structure and a deacidification structure, and relates to the technical field of molybdenum trioxide, redundant heat in waste gas is effectively dissipated through the heat exchange box, and energy recovery is realized; the desulfurization and denitrification tower is used for effectively removing sulfur and nitrate in smoke, so that the waste gas purification efficiency is improved; the dust removal box is used for further filtering desulfurized and denitrated solid particles to ensure the cleanliness of the waste gas; the deacidification tower is used for deacidifying the filtered smoke, so that the discharge of acidic substances is reduced; by utilizing the siphon principle, the smoke is efficiently drained to a treatment area through the cobweb shunt pipe and the J-shaped drainage pipe; through the design, the contact efficiency of the smoke and the treatment medium is improved, and the treatment effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of molybdenum trioxide production, in particular to a molybdenum trioxide roasting rotary kiln waste gas treatment device. Background Art

[0002] Rotary kilns are widely used in cement, lime, metallurgy and chemical industries. However, a large amount of waste gas is generated during its operation, which not only contains dust but also carries a large amount of waste heat. If this part of the waste heat is not recycled, it will cause a waste of resources. Waste gas treatment is mainly aimed at the treatment of various types of waste gas generated in industrial sites, including dust particles, flue gas, odorous gases, and toxic and harmful gases. Common waste gas treatment methods include factory smoke waste gas purification, workshop dust waste gas purification, organic waste gas purification, waste gas odor purification, acid and alkali waste gas purification, and chemical waste gas purification.

[0003] At present, desulfurization and denitrification towers are often used in industrial waste gas treatment, but existing desulfurization and denitrification towers have some problems. For example, the flue gas purification effect is poor, and the dust in the flue gas easily causes the filter plate to be blocked, which in turn affects the normal operation of the desulfurization and denitrification tower, reduces its flue gas purification effect, and is not conducive to practical application. In view of this, in-depth research on the above problems led to the creation of this case. Utility Model Content

[0004] To achieve the above purpose, the utility model is implemented through the following technical solutions: a molybdenum trioxide roasting rotary kiln furnace exhaust gas treatment device, comprising: a heat exchange box, a desulfurization and denitration tower, a dust removal box, a deacidification tower, a desulfurization and denitration structure and a deacidification structure, the heat exchange box, the desulfurization and denitration tower, the dust removal box and the deacidification tower are connected by pipelines, the desulfurization and denitration structure is installed on the inner side of the desulfurization and denitration tower, and the deacidification structure is installed on the inner side of the deacidification tower;

[0005] The desulfurization and denitrification structure comprises: a plurality of partition plates, a plurality of spider web diversion pipes, a plurality of J-shaped drainage pipes, a plurality of spray ring pipes, a plurality of spray nozzles, a spray box, a spray pump, a plurality of stirring concave rings, a plurality of stirring convex rings, a plurality of stirring plates, a stirring concave bearing block, a stirring drive shaft, a stirring drive motor, a plurality of stirring rings, a plurality of stirring magnets, a plurality of stirring conduction arcs and a plurality of one-way horn plates;

[0006] Several of the partition plates are evenly installed on the inner side of the desulfurization and denitration tower, several of the spider web shunt pipes are respectively inserted on the inner side of several of the partition plates, several of the J-shaped drainage pipes are respectively inserted on the spider web shunt pipes in several of the partition plates, several of the spray annular pipes are respectively evenly installed on the inner side of the desulfurization and denitration tower, several of the spray nozzles are respectively evenly inserted on several of the spray annular pipes, the spray box is installed on the outer side of the desulfurization and denitration tower, the spray pump is installed on the spray box, and the spray pump is connected to several of the spray annular pipes through pipelines, several of the stirring concave rings are evenly installed on the inner side of the desulfurization and denitration tower, and several of the stirring convex rings are respectively movably inserted on several of the stirring concave rings. The inner side of the ring, several stirring blades are respectively installed on several stirring convex rings, the stirring concave bearing block is sleeved on the outer side of the desulfurization and denitration tower, the stirring drive shaft is inserted on the stirring concave bearing block, the stirring drive motor is installed on the stirring concave bearing block, and the driving end of the stirring drive motor is connected to the stirring drive shaft, several stirring rings are respectively installed on several stirring drive shafts, several stirring conduction arcs are evenly inserted on the stirring concave rings and the desulfurization and denitration tower, several stirring magnets are respectively installed on several stirring rings and several stirring convex rings, and several one-way horn sheets are evenly installed on several spider web shunt pipes and several J-shaped drainage pipes;

[0007] It should be noted that, in the above, the excess heat in the exhaust gas is dissipated through the heat exchange box, and then the smoke is drained to the inner side of the desulfurization and denitrification tower, the sulfur and nitrate in the smoke are filtered out through the desulfurization and denitrification structure, and then the solid particles after desulfurization and denitrification are filtered out through the dust removal box, and the filtered smoke is drained to the inner side of the deacidification tower, and deacidification treatment is carried out through the deacidification structure, and the desulfurization and denitrification tower is divided into several sections of sealed space by a number of partitions, and a number of spider web diversion pipes and a number of J-type drainage pipes are cooperated to achieve the goal of draining the smoke at the bottom of the partition plate to the top of the partition plate (using the siphon principle), and draining the smoke to the inner side of the J-type drainage pipe through the siphon principle, and draining the smoke to the neutralization liquid or gravel raw material through the J-type drainage pipe. Under high temperature conditions, a reducing agent containing amino groups (such as urea) is sprayed into the exhaust gas, and the reducing agent is rapidly thermally decomposed into NH3 and other by-products, and reacts with N in the exhaust gas. Ox reacts to generate N2 and water, thereby achieving the purpose of denitrification. Alkaline substances are used to react chemically with SO2 in the exhaust gas to generate stable compounds such as sulfates, thereby removing SO2 from the exhaust gas. The stirring drive motor on the stirring concave bearing block is driven to rotate the stirring drive shaft on the driving end of the stirring drive motor, and the stirring drive shaft drives several stirring rings thereon to rotate. The stirring magnets on the several stirring rings are used to transfer magnetism to the stirring conduction arc, and the magnetism is transferred to the stirring magnets on the several stirring convex ring blocks through the several stirring conduction arcs. Through magnetic drive (magnetic gear principle), the stirring convex ring is made to rotate stably horizontally on the inner side of the stirring concave ring, and the rotating stirring convex ring drives several stirring plates thereon. Through the rotation of several stirring plates, the raw material sand on several partition plates is rotated, thereby achieving the effect of full reaction.

[0008] Preferably, the deacidification structure comprises: a plurality of layered plates, a plurality of siphon suction pipes, a gas agitator, a raw material box, a circulation pump and a circulation pipe;

[0009] A plurality of the layering plates are evenly installed on the inner side of the deacidification tower, a plurality of the siphon suction pipes are inserted on the plurality of the layering plates, the gas agitator is installed on the inner side of the deacidification tower, the raw material box is installed on the deacidification tower, the circulation pump is installed on the bottom end of the deacidification tower, the circulation pipe is installed on the circulation pump, and the circulation pipe is inserted on the top end of the deacidification tower;

[0010] It should be noted that, in the above, the deacidification tower is divided into several sections by several layering plates, the gas between the layering plates is drained by siphoning the raw materials through the siphon suction pipe, the raw materials falling from the raw material box are mixed and stirred by the gas agitator, and the bottom liquid inside the deacidification tower is drained to the top through the cooperation of the circulating pump and the circulating pipe.

[0011] Preferably, a flow valve is provided on the raw material box.

[0012] Preferably, a pH sensor is provided inside the deacidification tower.

[0013] Preferably, a one-way valve is provided on the circulation pipe.

[0014] Preferably, a plurality of loading boxes are provided on the desulfurization and denitrification tower.

[0015] The utility model provides a waste gas treatment device for a molybdenum trioxide roasting rotary kiln. It has the following beneficial effects: the waste gas treatment device for a molybdenum trioxide roasting rotary kiln effectively dissipates excess heat in the waste gas through a heat exchange box to achieve energy recovery; the desulfurization and denitrification tower effectively removes sulfur and nitrate in the smoke to improve the waste gas purification efficiency; the dust removal box further filters the solid particles after desulfurization and denitrification to ensure the cleanliness of the waste gas; the deacidification tower deacidifies the filtered smoke to reduce the emission of acidic substances; the siphon principle is used to efficiently drain the smoke to the treatment area through a spider web diversion pipe and a J-shaped drainage pipe; this design improves the contact efficiency between the smoke and the treatment medium and enhances the treatment effect; a reducing agent containing amino groups, such as urea, is sprayed under high temperature conditions to achieve rapid Thermal decomposition and reaction with NOx to generate N2 and water, effectively removing NOx; using alkaline substances to react chemically with SO2 in the exhaust gas to generate stable sulfate compounds, effectively removing SO2; the stirring ring and the stirring convex ring are driven by the stirring driver to rotate to achieve full stirring and reaction of the raw sand; the magnetic drive design ensures the stability and efficiency of the stirring process; the layered plate divides the deacidification tower into several sections, improving the processing efficiency and flexibility; the gas agitator promotes the mixing and stirring of the raw materials, further enhancing the deacidification effect; the cooperation of the circulation pump and the circulation pipe realizes the circulation and drainage of the liquid from the bottom of the inner side of the deacidification tower to the top, improving the utilization rate of the liquid and the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a front and cross-sectional view of a waste gas treatment device for a molybdenum trioxide roasting rotary kiln described in the utility model.

[0017] Figure 2 It is a top view and partial cross-sectional schematic diagram of a waste gas treatment device for a molybdenum trioxide roasting rotary kiln described in the utility model.

[0018] Figure 3 for Figure 1 A partial enlarged view of “A” in the figure.

[0019] In the figure: 1. heat exchange box; 2. desulfurization and denitrification tower; 3. dust removal box; 4. deacidification tower; 5. partition plate; 6. spider web diverter pipe; 7. J-type drainage pipe; 8. spray ring pipe; 9. spray nozzle; 10. spray box; 11. spray pump; 12. stirring concave ring; 13. stirring convex ring; 14. stirring plate; 15. stirring concave bearing block; 16. stirring drive shaft; 17. stirring drive motor; 18. stirring ring; 19. stirring magnet; 20. stirring conduction arc. DETAILED DESCRIPTION

[0020] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0021] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and appropriate controllers and encoders should be selected according to actual conditions to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the order of working in sequence. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principles and processes, and no longer explains the electrical control. Example

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-3As shown, the heat exchange box 1, the desulfurization and denitrification tower 2, the dust removal box 3 and the deacidification tower 4 are connected by pipelines, the desulfurization and denitrification structure is installed on the inner side of the desulfurization and denitrification tower 2, and the deacidification structure is installed on the inner side of the deacidification tower 4; the desulfurization and denitrification structure includes: a plurality of partition plates 5, a plurality of spider web diversion pipes 6, a plurality of J-shaped drainage pipes 7, a plurality of spray ring pipes 8, a plurality of spray nozzles 9, a spray box 10, a spray pump 11, a plurality of stirring concave rings 12, a plurality of stirring convex rings 13, a plurality of stirring blades 14, a stirring concave bearing block 15, a stirring drive shaft 16, a stirring drive machine 17, and a plurality of stirring rings 18. , a plurality of stirring magnets 19, a plurality of stirring conduction arcs 20 and a plurality of one-way horn plates; a plurality of said partition plates 5 are evenly installed on the inner side of said desulfurization and denitration tower 2, a plurality of said spider web shunt pipes 6 are respectively inserted on the inner sides of a plurality of said partition plates 5, a plurality of said J-shaped drainage pipes 7 are respectively inserted on the spider web shunt pipes 6 in a plurality of said partition plates 5, a plurality of said spray annular pipes 8 are respectively evenly installed on the inner side of said desulfurization and denitration tower 2, a plurality of said spray nozzles 9 are respectively evenly inserted on a plurality of said spray annular pipes 8, a said spray box 10 is installed on the outer side of said desulfurization and denitration tower 2, a said spray pump 11 is installed On the spray box 10, and the spray pump 11 is connected to the plurality of spray annular tubes 8 through a pipeline, the plurality of stirring concave rings 12 are evenly installed on the inner side of the desulfurization and denitration tower 2, the plurality of stirring convex rings 13 are respectively and movably inserted on the inner sides of the plurality of stirring concave rings 12, the plurality of stirring blades 14 are respectively installed on the plurality of stirring convex rings 13, the stirring concave bearing block 15 is sleeved on the outer side of the desulfurization and denitration tower 2, the stirring drive shaft 16 is inserted on the stirring concave bearing block 15, the stirring drive motor 17 is installed on the stirring concave bearing block 15, and the stirring drive motor 1 7 driving end is connected to the stirring drive shaft 16, a plurality of stirring rings 18 are respectively installed on a plurality of stirring drive shafts 16, a plurality of stirring conduction arcs 20 are evenly inserted on the stirring concave ring 12 and the desulfurization and denitration tower 2, a plurality of stirring magnets 19 are respectively installed on a plurality of stirring rings 18 and a plurality of stirring convex rings 13, a plurality of one-way horn plates are respectively evenly installed on a plurality of spider web shunt pipes 6 and a plurality of J-shaped drainage pipes 7; the deacidification structure includes: a plurality of layered plates, a plurality of siphon drainage pipes, a gas agitator, a raw material box, a circulation pump and a circulation pipe;Several stratified plates are evenly installed on the inner side of the deacidification tower 4, several siphon suction pipes are inserted on several stratified plates, the gas agitator is installed on the inner side of the deacidification tower 4, the raw material box is installed on the deacidification tower 4, the circulation pump is installed on the bottom end of the deacidification tower 4, the circulation pipe is installed on the circulation pump, and the circulation pipe is inserted on the top of the deacidification tower 4; a flow valve is provided on the raw material box; a pH sensor is provided on the inner side of the deacidification tower 4; a one-way valve is provided on the circulation pipe; and several loading boxes are provided on the desulfurization and denitration tower 2. ;

[0023] According to the attached Figure 1-3 It is concluded that the excess heat in the exhaust gas is dissipated through the heat exchange box 1, and then the smoke is drained to the inside of the desulfurization and denitration tower 2, and the sulfur and nitrate in the smoke are filtered out through the desulfurization and denitration structure, and then the solid particles after desulfurization and denitration are filtered out through the dust removal box 3, and the filtered smoke is drained to the inside of the deacidification tower 4, and deacidification is carried out through the deacidification structure. The desulfurization and denitration tower 2 is divided into several sealed spaces by several partition plates 5, and the smoke at the bottom of the partition plate 5 is drained through the cooperation of several spider web diversion pipes 6 and several J-shaped drainage pipes 7. To the top of the partition plate 5 (using the siphon principle), the smoke is drained to the inner side of the J-type drainage pipe 7 by the siphon principle, and the smoke is drained to the neutralizing liquid or gravel raw material through the J-type drainage pipe 7. Under high temperature conditions, a reducing agent containing amino groups (such as urea) is sprayed into the exhaust gas. The reducing agent is rapidly thermally decomposed into NH3 and other by-products, and reacts with NOx in the exhaust gas to generate N2 and water, thereby achieving the purpose of denitrification. Alkaline substances are used to react chemically with SO2 in the exhaust gas to generate stable compounds such as sulfates, thereby removing SO2 from the exhaust gas. The stirring drive 17 on the concave bearing block 15 is running, driving the stirring drive shaft 16 on the driving end of the stirring drive 17 to rotate, and the stirring drive shaft 16 drives the plurality of stirring rings 18 thereon to rotate, and the stirring magnets 19 on the plurality of stirring rings 18 are used to transfer magnetism to the stirring conduction arc 20, and the magnetism is transferred to the stirring magnets 19 on the plurality of stirring convex rings 13 through the plurality of stirring conduction arcs 20, and the stirring convex ring 13 is driven by magnetic drive (magnetic gear principle) to stably move on the inner side of the concave stirring ring 12. It rotates horizontally, and the rotating stirring convex ring 13 drives a plurality of stirring blades 14 thereon, and the rotation of the plurality of stirring blades 14 can rotate the raw material sand on the plurality of partition plates 5, so as to achieve the effect of full reaction; the deacidification tower 4 is divided into a plurality of sections by a plurality of layering plates, and the gas between the layering plates is drained by siphoning the raw material through a siphon suction pipe, and the raw material falling from the raw material box is mixed and stirred through a gas agitator, and the bottom liquid inside the deacidification tower 4 is drained to the top through the cooperation of a circulating pump and a circulating pipe.

[0024] 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 molybdenum trioxide roasting rotary kiln exhaust gas treatment device, comprising: A heat exchange box, a desulfurization and denitration tower, a dust removal box, a deacidification tower, a desulfurization and denitration structure, and a deacidification structure, characterized in that the heat exchange box, the desulfurization and denitration tower, the dust removal box, and the deacidification tower are connected by pipelines, the desulfurization and denitration structure is installed on the inner side of the desulfurization and denitration tower, and the deacidification structure is installed on the inner side of the deacidification tower; The desulfurization and denitrification structure comprises: a plurality of partition plates, a plurality of spider web diversion pipes, a plurality of J-shaped drainage pipes, a plurality of spray ring pipes, a plurality of spray nozzles, a spray box, a spray pump, a plurality of stirring concave rings, a plurality of stirring convex rings, a plurality of stirring plates, a stirring concave bearing block, a stirring drive shaft, a stirring drive motor, a plurality of stirring rings, a plurality of stirring magnets, a plurality of stirring conduction arcs and a plurality of one-way horn plates; Several of the partition plates are evenly installed on the inner side of the desulfurization and denitration tower, several of the spider web shunt pipes are respectively inserted on the inner side of several of the partition plates, several of the J-shaped drainage pipes are respectively inserted on the spider web shunt pipes in several of the partition plates, several of the spray annular pipes are respectively evenly installed on the inner side of the desulfurization and denitration tower, several of the spray nozzles are respectively evenly inserted on several of the spray annular pipes, the spray box is installed on the outer side of the desulfurization and denitration tower, the spray pump is installed on the spray box, and the spray pump is connected to several of the spray annular pipes through pipelines, several of the stirring concave rings are evenly installed on the inner side of the desulfurization and denitration tower, and several of the stirring convex rings are respectively movably inserted on several of the stirring concave rings. On the inner side of the ring, several stirring blades are respectively installed on several stirring convex rings, the stirring concave bearing block is mounted on the outer side of the desulfurization and denitrification tower, the stirring drive shaft is inserted on the stirring concave bearing block, the stirring drive motor is installed on the stirring concave bearing block, and the driving end of the stirring drive motor is connected to the stirring drive shaft, several stirring rings are respectively installed on several stirring drive shafts, several stirring conduction arcs are evenly inserted on the stirring concave rings and the desulfurization and denitrification tower, several stirring magnets are respectively installed on several stirring rings and several stirring convex rings, and several one-way horn plates are evenly installed on several spider web diversion pipes and several J-shaped drainage pipes.

2. The exhaust gas treatment device for a molybdenum trioxide roasting rotary kiln according to claim 1, characterized in that: The deacidification structure comprises: a plurality of layered plates, a plurality of siphon suction pipes, a gas agitator, a raw material box, a circulation pump and a circulation pipe; A number of the layering plates are evenly installed on the inner side of the deacidification tower, a number of the siphon suction pipes are inserted on a number of the layering plates, the gas agitator is installed on the inner side of the deacidification tower, the raw material box is installed on the deacidification tower, the circulation pump is installed on the bottom end of the deacidification tower, the circulation pipe is installed on the circulation pump, and the circulation pipe is inserted on the top end of the deacidification tower.

3. A molybdenum trioxide roasting rotary kiln exhaust gas treatment device according to claim 2, characterized in that: The raw material box is provided with a flow valve.

4. The exhaust gas treatment device for a molybdenum trioxide roasting rotary kiln according to claim 3 is characterized in that: A pH sensor is arranged inside the deacidification tower.

5. The exhaust gas treatment device for a molybdenum trioxide roasting rotary kiln according to claim 4, characterized in that: A one-way valve is arranged on the circulation pipe.

6. The exhaust gas treatment device for a molybdenum trioxide roasting rotary kiln according to claim 5, characterized in that: The desulfurization and denitrification tower is provided with a plurality of loading boxes.

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