Molecular sieve slurry preparation device with dustproof effect

Abstract

The utility model belongs to the technical field of slurry preparation devices in molecular sieve production, and particularly relates to a molecular sieve slurry preparation device with a dustproof effect. The molecular sieve slurry preparation device with the dustproof effect comprises a roasting furnace, a material collecting box is arranged at the tail of the roasting furnace, the material collecting box is connected with a furnace tail bag-type dust collector, the furnace tail bag-type dust collector is connected with a furnace tail pulping tank through an auger, the furnace tail pulping tank is provided with a pipeline connected with the material collecting box, and the furnace tail pulping tank is connected with a coarse material slurry tank. According to the molecular sieve slurry preparation device with the dustproof effect, the stainless steel pipeline is arranged between the top of the furnace tail pulping tank and the roasting furnace material collecting box, so that the problem of dust on a production site is effectively reduced, the stability of subsequent grinding is ensured, meanwhile, negative pressure in the roasting furnace is fully utilized, cyclic utilization of the dust is realized, and the production cost is reduced. The utilization rate of resources is improved, and the production environment is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of slurry preparation device in molecular sieve production, specifically relating to a molecular sieve slurry preparation device with dustproof effect. Background Technology

[0002] The basic process for producing molecular sieves involves mixing silica gel and sodium aluminate solution, adding template agents / seed crystals, and generating molecular sieves through hydrothermal synthesis under certain conditions. Then, a series of operations such as filtration, washing, activation, modification, drying, and calcination are performed to produce qualified finished molecular sieve products.

[0003] After activation and drying, the molecular sieve material is calcined in a calcination furnace. The calcined molecular sieve material is then further ground (slurry grinding or air jet grinding) according to production needs. During the slurry grinding stage, the high-temperature calcined molecular sieve material needs to be pulped in the tail end pulping tank. The material enters the tail end pulping tank via an auger. Due to the slightly positive pressure inside the tank, the molecular sieve material cannot completely mix with the solution inside, causing material dust to escape from the tail end pulping tank. This results in poor hygiene at the production site and in the environment, as well as significant safety hazards, affecting the stability of subsequent equipment and impacting the health of relevant operators. Utility Model Content

[0004] The purpose of this invention is to overcome the defects of the existing technology and provide a molecular sieve slurry preparation device with dust prevention effect. A stainless steel pipeline is set between the top of the slurry tank at the tail of the furnace and the collection box of the roasting furnace, which effectively reduces the dust problem at the production site and ensures the stability of subsequent grinding. At the same time, the negative pressure in the roasting furnace is fully utilized to realize the recycling of dust, improve the utilization rate of resources, and protect the production environment.

[0005] The dust-proof molecular sieve slurry preparation device of this utility model includes an activation tank, which is connected to the top of a flash feed tank. The bottom outlet of the flash feed tank is connected to the inlet of a flash drying device. The outlet of the flash drying device is connected to a bag filter. The bottom of the bag filter is provided with a pipeline connected to the inlet of a calcining furnace. A collection box is provided at the tail of the calcining furnace. The bottom of the collection box is connected to the tail bag filter. The tail bag filter is connected to the tail pulping tank via an auger. The top of the tail pulping tank is provided with a pipeline connected to the top of the collection box. The tail pulping tank is connected to a coarse slurry tank. The coarse slurry tank is connected to a sand mill unit. The sand mill unit is connected to a fine slurry intermediate tank. The fine slurry intermediate tank is connected to the slurry tank. An external supply pipeline is provided at the bottom of the slurry tank.

[0006] Preferably, the activation tank is provided with an activator inlet and a molecular sieve material inlet at the top.

[0007] Preferably, an acidic water pipeline is provided at the top of the tail-end pulping tank.

[0008] Preferably, a ball valve is installed on the pipeline connecting the top of the furnace tail pulping tank and the top of the collection box, and the ball valve is located on the side close to the furnace tail pulping tank.

[0009] Preferably, the lower part of the roasting furnace is connected to a blower, and the lower part of the roasting furnace is connected to a natural gas pipeline, on which a flame arrester is installed.

[0010] Preferably, the top of the furnace tail bag filter is connected to the exhaust gas treatment device via an induced draft fan, and the bottom is provided with a pipeline connected to a cold packing tank, which is connected to a downstream airflow grinding device.

[0011] Preferably, the input end of the sand mill unit is equipped with a pipeline for returning to the coarse slurry tank, and the stability of the grinding process is ensured by partial return.

[0012] Preferably, the sand mill unit consists of two sand mills connected in series.

[0013] Specifically, the working process of the molecular sieve slurry preparation device with dustproof effect described in this utility model is as follows: Unactivated molecular sieve material and activator enter the activation tank through the top inlet of the activation tank for activation, and then enter the flash feed tank and flash drying device in sequence through the conveying pump. The dried molecular sieve material enters the bag filter dust collector. The dust-removed material is conveyed to the roasting furnace through the bottom outlet of the bag filter dust collector. The roasting is completed by the heat source provided by the blower and the natural gas pipeline with flame arrester. The molecular sieve material after high-temperature roasting enters the tail bag filter dust collector through the bottom outlet of the tail collection box of the roasting furnace. The exhaust gas is discharged into the exhaust gas treatment device from the top of the tail bag filter dust collector through the induced draft fan. After the dust is deposited at the bottom of the dust collector, part of it is conveyed to the downstream air jet mill through the cold pack tank, and the other part is sent to the tail pulping tank through the screw conveyor. It is mixed with the acidic water in the tank and pulped. After reaching a certain concentration and liquid level, it is transferred to the coarse slurry tank for buffering, and then enters the sand. The grinding mill unit grinds molecular sieve materials. To ensure grinding effect and molecular sieve particle size, the sand mill unit consists of two sand mills connected in series. The ground material enters the intermediate tank for buffering and finally enters the slurry tank for storage. An external supply pipeline is installed at the bottom of the slurry tank. During the operation of the unit, the tail pulping tank is under a slightly positive pressure. The material conveyed by the auger cannot directly and completely mix with the acidic water in the tank, resulting in dust accumulation inside the tank. At this time, it is necessary to adjust the ball valve on the pipeline connecting the top of the tail pulping tank and the top of the collection box. Using the negative pressure of the roasting furnace, the unmixed molecular sieve material dust in the tank is drawn back to the tail collection box of the roasting furnace, realizing the recycling of molecular sieve materials and forming a circulation in the original roasting slurry grinding system. This solves the dust problem in the tail pulping tank and reduces material loss. During the operation of the unit, the opening of the ball valve can be adjusted according to the actual production situation to ensure operational stability.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] This invention relates to a dust-proof molecular sieve slurry preparation device. By installing a pipeline between the top of the pulping tank at the tail of the furnace and the material collection box at the tail of the roasting furnace, the negative pressure inside the roasting furnace is utilized to reduce dust pollution to the environment, solve the dust problem of the pulping tank at the tail of the furnace, ensure a safe production environment, and eliminate the need for additional dust removal devices. At the same time, it realizes the circulation of molecular sieve materials, reduces material loss, and utilizes the negative pressure advantage of the roasting furnace to guide the roasting furnace materials to downstream devices, improving resource utilization and further ensuring the stability of the subsequent slurry preparation process. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the molecular sieve slurry preparation device with dustproof effect described in this utility model.

[0017] In the diagram: 1. Roasting furnace; 2. Collection box; 3. Furnace tail bag filter; 4. Furnace tail pulping tank; 5. Cold packing tank; 6. Coarse material slurry tank; 7. Sand mill; 8. Intermediate grinding slurry tank; 9. Slurry tank; 10. External supply pipeline; 11. Bag filter; 12. Flash drying device; 13. Flash feed tank; 14. Activation tank; 15. Blower; 16. Natural gas pipeline; 17. Flame arrester; 18. Downstream airflow grinding device; 19. Tail gas treatment device; 20. Acidic water pipeline; 21. Ball valve; 22. Exhaust fan. Detailed Implementation

[0018] The specific technical solution of this utility model will be further described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, the molecular sieve slurry preparation device with dust prevention effect includes a calcining furnace 1, a furnace tail bag filter 3, and a furnace tail pulping tank 4. A collection box 2 is provided at the furnace tail of the calcining furnace 1. The bottom of the collection box 2 is connected to the furnace tail bag filter 3. The furnace tail bag filter 3 is connected to the furnace tail pulping tank 4 through an auger. A pipeline for returning to the top of the collection box 2 is provided at the top of the furnace tail pulping tank 4. The furnace tail pulping tank 4 is connected to a coarse slurry tank 6. The coarse slurry tank 6 is connected to a sand mill unit. The sand mill unit is connected to a fine slurry intermediate tank 8. The fine slurry intermediate tank 8 is connected to a slurry tank 9. An external supply pipeline 10 is provided at the bottom of the slurry tank 9.

[0020] The inlet of the roasting furnace 1 is provided with a pipeline connected to the bottom of the bag filter 11. The bag filter 11 is connected to the outlet of the flash drying device 12. The inlet of the flash drying device 12 is connected to the bottom outlet of the flash feed tank 13. The top of the flash feed tank 13 is connected to the activation tank 14.

[0021] The activation tank 14 is equipped with an activator inlet and a molecular sieve material inlet at the top.

[0022] The top of the furnace tail pulping tank 4 is connected to the acidic water pipeline 20.

[0023] A ball valve 21 is installed on the pipeline from the top of the tail-end pulping tank 4 to the top of the collection box 2. The ball valve 21 is located on the side close to the tail-end pulping tank 4.

[0024] The lower part of the roasting furnace 1 is connected to the blower 15, and the lower part of the roasting furnace 1 is connected to the natural gas pipeline 16. A flame arrester 17 is installed on the natural gas pipeline 16.

[0025] The top of the furnace tail bag filter 3 is connected to the exhaust gas treatment device 19 via an induced draft fan 22, and the bottom is provided with a pipeline connected to the cold pack tank 5. The cold pack tank 5 is connected to the downstream airflow grinding device 18.

[0026] The input end of the sand mill unit is equipped with a pipeline for returning to the coarse slurry tank 6.

[0027] The aforementioned sand mill unit consists of two sand mills 7 connected in series.

[0028] The dust-proof molecular sieve slurry preparation device of this utility model operates as follows: Unactivated molecular sieve material and activator enter the activation tank 14 through the top inlet of the activation tank 14 for activation, and then are sequentially pumped into the flash feed tank 13 and the flash drying device 12. The dried molecular sieve material enters the bag filter 11, and the dust-removed material is conveyed to the calcining furnace 1 through the bottom outlet of the bag filter 11. Heat is provided by the blower 15 and the natural gas pipeline 16 with flame arrester 17. After the source is roasted, the molecular sieve material after high-temperature roasting enters the tail bag filter 3 through the bottom outlet of the tail collection box 2 of the roasting furnace 1. The exhaust gas is discharged from the top of the tail bag filter 3 through the induced draft fan 22 into the exhaust gas treatment device 19. After the dust is deposited at the bottom of the dust collector, part of it is transported to the downstream air jet mill 18 through the cold pack tank 5, and the other part is sent to the tail pulping tank 4 through the screw conveyor. Water is injected into the tank through the top acidic water pipe 20 to make pulp. After reaching a certain concentration and liquid level, the material is transferred to the coarse slurry tank. The material is buffered at 6 and then enters the sand mill unit to grind the molecular sieve material. To ensure the grinding effect and the molecular sieve particle size, the sand mill unit consists of two sand mills 7 connected in series. The ground material enters the intermediate grinding slurry tank 8 for buffering and finally enters the slurry tank 9 for storage. The bottom of the slurry tank 9 is equipped with an external supply pipeline 10. During the operation of the device, the tail slurry tank 4 is under a slight positive pressure. The material conveyed by the screw conveyor cannot directly and completely mix with the acidic water in the tank. Therefore, dust will accumulate. Inside the tank, at this time, the ball valve 21 on the pipeline connecting the top of the tail pulping tank 4 and the top of the collection box 2 needs to be adjusted. Using the negative pressure of the roasting furnace 1, the unfused molecular sieve material dust in the tank is drawn back to the tail collection box 2 of the roasting furnace 1, realizing the recycling of molecular sieve material and forming a circulation in the original roasting slurry grinding system. This solves the dust problem of the tail pulping tank 4 and reduces material loss. During the operation of the device, the opening of the ball valve 21 can be adjusted according to the actual production situation to ensure operational stability.

Claims

1. A molecular sieve slurry preparation device with dust-proof effect, comprising a calcining furnace (1), a furnace tail bag filter (3), and a furnace tail slurry mixing tank (4), characterized in that, The roasting furnace (1) is equipped with a material collection box (2) at the tail. The bottom of the material collection box (2) is connected to the tail bag dust collector (3). The tail bag dust collector (3) is connected to the tail pulping tank (4) through an auger. The top of the tail pulping tank (4) is equipped with a pipeline that returns to the top of the material collection box (2). The tail pulping tank (4) is connected to the coarse slurry tank (6). The coarse slurry tank (6) is connected to the sand mill unit. The sand mill unit is connected to the intermediate grinding slurry tank (8). The intermediate grinding slurry tank (8) is connected to the slurry tank (9). The bottom of the slurry tank (9) is equipped with an external supply pipeline (10).

2. The molecular sieve slurry preparation device with dustproof effect according to claim 1, characterized in that, The roasting furnace (1) is provided with a pipeline at the inlet connected to the bottom of the bag filter (11), the bag filter (11) is connected to the outlet of the flash drying device (12), the inlet of the flash drying device (12) is connected to the bottom outlet of the flash feed tank (13), and the top of the flash feed tank (13) is connected to the activation tank (14).

3. The molecular sieve slurry preparation device with dustproof effect according to claim 2, characterized in that, The activation tank (14) is provided with an activator inlet and a molecular sieve material inlet at the top.

4. The molecular sieve slurry preparation device with dustproof effect according to claim 1, characterized in that, The top of the furnace tail pulping tank (4) is connected to the acidic water pipeline (20).

5. The molecular sieve slurry preparation device with dustproof effect according to claim 1, characterized in that, A ball valve (21) is installed on the pipeline from the top of the tail-end pulping tank (4) back to the top of the collection box (2), and the ball valve (21) is located on the side close to the tail-end pulping tank (4).

6. The molecular sieve slurry preparation device with dustproof effect according to claim 1, characterized in that, The lower part of the roasting furnace (1) is connected to a blower (15) and a natural gas pipeline (16), and a flame arrester (17) is installed on the natural gas pipeline (16).

7. The molecular sieve slurry preparation apparatus with dustproof effect according to claim 1, characterized in that, The top of the furnace tail bag filter (3) is connected to the exhaust gas treatment device (19) via an induced draft fan (22), and the bottom is provided with a pipeline connected to the cold pack tank (5). The cold pack tank (5) is connected to the downstream airflow grinding device (18).

8. The molecular sieve slurry preparation device with dustproof effect according to claim 1, characterized in that, The input end of the sand mill unit is equipped with a pipeline that returns to the coarse slurry tank (6).

9. The molecular sieve slurry preparation apparatus with dustproof effect according to claim 1, characterized in that, The aforementioned sand mill unit consists of two sand mills (7) connected in series.

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