A dust removal and recovery device and dust removal and recovery method for a spray tower

Abstract

The present invention provides a dust collection and recovery device and a dust collection and recovery method for a spray tower, comprising: a spray tower, and a dust collector connected to the spray tower; the spray tower is provided with a discharge port, and a spray conveyor belt is provided below the discharge port; the dust collector is provided with a recovery port, and a fine powder conveyor belt is provided below the recovery port; the fine powder conveyor belt is used to convey the recovered fine powder in the dust collector to the spray conveyor belt. The present invention realizes direct recovery by directly manufacturing a fine powder conveyor belt below the dust collector recovery port, and directly conveying the fine powder of the same formula according to the proportion to the spray conveyor belt below the spray tower for storage and use, which is efficient, energy-saving, fast, and environmentally friendly, and will not generate secondary dust, thereby improving the efficiency of recovering fine powder.

Description

Technical Field

[0001] The present invention relates to the technical field of ceramics, and in particular to a dust removal and recovery device and a dust removal and recovery method for a spray tower. Background Art

[0002] The bag filter is a dry dust filtration device that absorbs and collects dust from areas of the spray tower process within the workshop where dust is most likely to be generated. Further processing is required. The traditional method is to place a hopper device below the dust outlet of the bag filter to catch the collected dust. The dust is then transported to the ball mill workshop by forklift for use as a recycled raw material. This method of recycling dust can easily generate severe secondary dust during the forklift transportation and batching processes, forming secondary dust pollution, which is very detrimental to both the environment and the health of workshop workers.

[0003] Therefore, the existing technology has defects and needs to be improved and developed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a dust removal and recovery device and a dust removal and recovery method for a spray tower in response to the above-mentioned defects of the prior art, aiming to solve the problem in the prior art that serious secondary dust is easily generated during transportation using a forklift, forming secondary dust pollution.

[0005] The technical solutions adopted by the present invention to solve the technical problems are as follows:

[0006] A dust removal and recovery device for a spray tower, comprising: a spray tower and a dust collector connected to the spray tower; a discharge port is provided on the spray tower, and a spray conveyor belt is provided below the discharge port; a recovery port is provided on the dust collector, and a fine powder conveyor belt is provided below the recovery port; the fine powder conveyor belt is used to convey the recovered fine powder in the dust collector to the spray conveyor belt.

[0007] In one implementation, the dust collector is a bag dust collector, the recycling port is connected to a recycling pipe; and one end of the fine powder conveyor belt is arranged below the recycling pipe.

[0008] In one implementation, a lower hopper is provided at one end of the fine powder conveyor belt close to the spraying conveyor belt, and the lower hopper is provided above the spraying conveyor belt.

[0009] In one implementation, the dust removal and recovery device is further provided with a screw machine and a pulping tank; the dust collector is provided with a pulping port, and the pulping port, the screw machine and the pulping tank are connected in sequence.

[0010] In one implementation, the dust removal and recovery device also includes: a dust suction duct; a first dustproof shed is provided on the spray conveyor belt, and a second dustproof shed is provided on the fine powder conveyor belt; a first dust suction pipe is provided on the first dustproof shed, and a second dust suction pipe is provided on the second dustproof shed; the first dust suction pipe and the second dust suction pipe are both connected to the dust suction duct.

[0011] In one implementation, a third dust suction pipe is provided on the lower hopper, and the third dust suction pipe is connected to the dust suction air duct.

[0012] In one implementation, a first pneumatic valve is provided on the recycling port, and a second pneumatic valve is provided on the slurrying port.

[0013] In one implementation, the spray tower and the dust collector are arranged in parallel, the fine powder conveyor belt is arranged between the spray tower and the dust collector, and the height of the fine powder conveyor belt near the dust collector is lower than the height near the spray tower.

[0014] In one implementation, one end of the spraying conveyor belt facing away from the fine powder conveyor belt is connected to a feed bin, and the height of the spraying conveyor belt close to one end of the fine powder conveyor belt is lower than that of the other end.

[0015] The present invention further provides a dust removal and recovery method based on the dust removal and recovery device for the spray tower as described above, wherein the dust removal and recovery method comprises:

[0016] The dust collector sucks in the fine powder produced in the spray tower, and the fine powder enters the fine powder conveyor belt through the recovery port;

[0017] The fine powder conveyor belt conveys the fine powder to the spray conveyor belt, and at the same time, the material in the spray tower enters the spray conveyor belt through the discharge port;

[0018] The spraying conveyor belt conveys the fine powder and materials to the feeding silo.

[0019] The present invention provides a dust removal and recovery device and dust removal and recovery method for a spray tower, comprising: a spray tower, and a dust collector connected to the spray tower; a discharge port is provided on the spray tower, and a spray conveyor belt is provided below the discharge port; a recovery port is provided on the dust collector, and a fine powder conveyor belt is provided below the recovery port; the fine powder conveyor belt is used to convey the recovered fine powder in the dust collector to the spray conveyor belt. The present invention realizes direct recovery by directly manufacturing a fine powder conveyor belt below the dust collector recovery port, and conveying fine powder of the same formula according to the proportion directly to the spray conveyor belt below the spray tower for storage and use. It is efficient, energy-saving, fast, and environmentally friendly, and does not generate secondary dust, thereby improving the efficiency of fine powder recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a preferred embodiment of the dust removal and recovery device for a spray tower in the present invention.

[0021] Figure 2 The present invention is a flow chart of a dust removal and recovery method implemented by a dust removal and recovery device for a spray tower.

[0022] Description of reference numerals:

[0023] 100, spray tower; 110, discharge port; 200, dust collector; 210, recovery port; 220, recovery pipe; 230, pulping port; 300, spray conveyor belt; 310, first dustproof shed; 311, first dust suction pipe; 400, fine powder conveyor belt; 410, second dustproof shed; 411, second dust suction pipe; 500, lower hopper; 510, third dust suction pipe; 600, screw machine; 700, pulping tank; 810, first pneumatic valve; 820, second pneumatic valve; 900, spray tower. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear and distinct, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0025] There are two further ways to process the dust after it is collected: The first way is to install the dust outlet of the bag filter close to the water surface of the sewage pool, and put the dust collected by the dust collector directly into the sewage pool, and then precipitate it through the addition of chemicals, and then squeeze it. The resulting slurry is then transported to the ball mill workshop for use as a recycled raw material. This method will not generate secondary dust when further processing the dust collected by the dust collector, but it increases the pressure of sewage treatment. When the sewage becomes turbid, the amount of chemical addition needs to be increased, and the squeezing workload of the sewage treatment workers is also increased. The second way is to dig an underground circular pool under each bag filter as a pulping tank, and use a screw conveyor to transport the fine powder from the dust collector to the underground pulping tank. After pulping, use a plunger pump to pump it into the formulated pulp pool in the ball mill workshop, and digest it in a certain proportion in the corresponding formula.

[0026] The aforementioned conventional dust collectors all have significant drawbacks in their subsequent treatment of collected dust. Therefore, the present invention provides a more efficient and energy-efficient alternative to these fine powder treatment methods. The device of the present invention can be used for direct dry recovery of fine powder from spray tower bag filters in the ceramics industry.

[0027] See also Figure 1The present invention provides a dust removal and recovery device for a spray tower, comprising: a spray tower 100; and a dust collector 200 connected to the spray tower 100. That is, the spray tower 100 and the dust collector 200 are connected, and the dust collector 200 can collect dust generated in the spray tower 100. The spray tower 100 is provided with a discharge port 110, and a spray conveyor belt 300 is provided below the discharge port 110. Material in the spray tower 100 is sprayed from the discharge port 110 onto the spray conveyor belt 300 and stored in a silo for use. The dust collector 200 is provided with a recovery port 210, and a fine powder conveyor belt 400 is provided below the recovery port 210. The fine powder conveyor belt 400 is used to transport fine powder recovered from the dust collector 200 to the spray conveyor belt 300. Both the spray conveyor belt 300 and the fine powder conveyor belt 400 are controlled by an electronic control system that includes a frequency converter. The spraying conveyor belt 300 and the fine powder conveyor belt 400 can be conveyor belts with a length of 10m and a width of 400mm, and the spraying conveyor belt 300 and the fine powder conveyor belt 400 are connected to a first motor with a power of 2.2kw.

[0028] Of course, the material in the spray tower 100 must be of the same formula as the fine powder in the dust collector 200. When the formula in the spray tower 100 has changed, if the dust collector 200 still has the previous formula, the fine powder in the dust collector 200 will no longer be transported to the fine powder conveyor belt 400 and the spray material conveyor belt 300.

[0029] Through comparative experiments comparing raw materials and processes, a pressure test using a 3%-7% ratio of fine powder from the bag filter 200, uncontaminated by other materials, showed no significant effect on the size and thickness of finished bricks. Thus, the present invention employs a fine powder conveyor belt 400 directly below the dust collector 200 recovery port 210. This conveys the fine powder of the same formula according to the ratio directly to the spray conveyor belt 300 below the spray tower 100 for storage and use. This achieves direct recovery, which is efficient, energy-saving, fast, and environmentally friendly, without generating secondary dust, and improves the efficiency of fine powder recovery.

[0030] In one implementation, the dust collector 200 is a bag-type dust collector 200, and the recycle port 210 is connected to a recycle pipe 220. One end of the fine powder conveyor belt 400 is positioned below the recycle pipe 220. The bag-type dust collector 200 is a dry dust filtration device suitable for capturing fine, dry, non-fibrous dust. The filter bags are made of woven filter cloth or non-woven felt, utilizing the filtration properties of the fiber fabric to filter dust-laden gas. When the dust-laden gas enters the bag-type dust collector 200, large particles with high specific gravity settle due to gravity and fall into the ash hopper. The finer dust particles are retained as the gas passes through the filter material, thereby purifying the gas. The settled fine powder is discharged through the recycle port 210 and recycle pipe 220 onto the fine powder conveyor belt 400.

[0031] Furthermore, a lower hopper 500 is provided at one end of the fine powder conveyor belt 400 close to the spraying conveyor belt 300, and the lower hopper 500 is provided above the spraying conveyor belt 300. In other words, in order to smoothly transfer the fine powder on the fine powder conveyor belt 400 to the spraying conveyor belt 300, the lower hopper 500 is provided at the end of the fine powder conveyor belt 400 close to the spraying conveyor belt 300.

[0032] In one implementation, the dust removal and recovery device further includes a screw conveyor 600 and a pulping tank 700. The dust collector 200 is provided with a pulping port 230, and the pulping port 230, the screw conveyor 600, and the pulping tank 700 are sequentially connected. The screw conveyor 600 is connected to a second motor, and the power of the second motor can be 4KW.

[0033] Specifically, a screw conveyor 600 is installed below the dust collector 200. When the spray tower 100 changes its formulation, the fine powder in the dust collector 200 cannot be recovered. Instead, the fine powder is conveyed to a water tank for slurrying via the screw conveyor 600. Recipe switching occurs when the spraying material type in the spray tower 100 is changed from, for example, Material A to Material B. Consequently, the type of fine powder also changes to Material B. Due to the formulation change, the fine powder is converted from Material A to Material B. However, some Material A fine powder remains in the dust collector 200. This fine powder is unrecoverable and must be drained via the screw conveyor 600 to form a slurry before being pumped out and ball milled. After approximately 30 minutes of draining, the fine powder is considered acceptable.

[0034] Furthermore, the dust collection and recovery device also includes a dust suction duct. A first dust shed 310 is provided on the spraying conveyor belt 300, and a second dust shed 410 is provided on the fine powder conveyor belt 400. The first dust shed 310 is provided with a first dust suction pipe 311, and the second dust shed 410 is provided with a second dust suction pipe 411. Both the first dust suction pipe 311 and the second dust suction pipe 411 are connected to the dust suction duct. In other words, to prevent secondary dust, a dust shed is provided above the conveyor belt. Dust raised from the conveyor belt is directly sucked into the dust suction duct through the first dust suction pipe 311 and the second dust suction pipe 411, preventing dust from being generated.

[0035] Furthermore, the lower hopper 500 is provided with a third dust suction pipe 510, which is connected to the dust suction air duct. In other words, when the lower hopper 500 transfers fine powder from the fine powder conveyor belt 400 to the spray conveyor belt 300, dust is also generated. By providing the third dust suction pipe 510 on the lower hopper 500, the present invention sucks dust near the lower hopper 500 into the dust suction air duct through the third dust suction pipe 510, thereby preventing secondary dust generation.

[0036] Furthermore, a first pneumatic valve 810 is provided on the recycling port 210 , and a second pneumatic valve 820 is provided on the pulping port 230 .

[0037] Specifically, during dust removal and recovery, the first pneumatic valve 810 is opened, and the fine powder falls through the recovery pipe 220 onto the fine powder conveyor belt 400, where it is then transported through the lower hopper 500 to the spray conveyor belt 300. When the formula needs to be changed, the first pneumatic valve 810 is closed, and the second pneumatic valve 820 is opened, allowing the fine powder to be conveyed to the water tank for slurrying via the screw conveyor 600. Once the conversion is complete and the fine powder is deemed eligible for recovery, the second pneumatic valve 820 is closed, and the first pneumatic valve 810 is opened. The fine powder conveyor belt 400 then conveys the powder to the spray conveyor belt 300. The belt speed is controlled by the belt inverter, and the powder is transported to the silo for recycling at a ratio of approximately 7%.

[0038] In one implementation, the spray tower 100 and the dust collector 200 are arranged side by side, and the fine powder conveyor belt 400 is arranged between the spray tower 100 and the dust collector 200. The height of the fine powder conveyor belt 400 near the dust collector 200 is lower than the height near the spray tower 100. In this way, the fine powder is transported to a higher level, which can further reduce dust.

[0039] In one implementation, the end of the spraying conveyor belt 300 facing away from the fine powder conveyor belt 400 is connected to a feed silo, and the height of the spraying conveyor belt 300 near the fine powder conveyor belt 400 is lower than that of the other end. Similarly, the fine powder and materials are simultaneously transported to a higher location, further reducing dust.

[0040] Furthermore, the dust collector 200 is also connected to a spray tower 900, which is used for secondary dust removal. The spray tower is a secondary dust removal device of the entire spray tower system to prevent the dust collector from being damaged and the dust emission exceeding the standard.

[0041] The dust removal and recovery device of the present invention can solve the problem of serious secondary dust pollution caused by the existing dry powder recovery method using ball mills. It can also solve the problem of the old wet method of recovering slurry in a sewage pool and then ball milling and feeding, which increases the pressure on sewage treatment. The turbidity of the sewage requires an increase in the amount of reagents added, which also increases the squeezing workload of sewage treatment workers. This method of conveying the fine powder from the dust collector 200 to an underground pulping tank using a screw conveyor 600, and then using a plunger pump to the pulping tank in the ball mill workshop after pulping, is better than the previous two methods, but it still increases the power consumption of the ball mill workshop due to repeated ball milling and the coal consumption of repeated spraying in the spray tower 100. The dry recovery method of the present invention can significantly save the energy consumed by repeated grinding, stirring, and repeated spraying of fine powder in the ball mill. Based on a 14,000 tower output of 40 tons / hour, the proportion of fine powder is approximately 8%. The coal consumption is 60 kilograms per ton of powder, and the power consumption of the ball mill is 46 kilograms per ton of material. Based on a 330-day operation schedule, the company saves 1,748 tons of coal, approximately RMB 1.41 million, and over 1.16 million kWh of electricity, approximately RMB 700,000. It also reduces labor costs for fine powder transfer and auxiliary material costs for wastewater treatment by approximately RMB 100,000 per year. The total annual savings are expected to exceed RMB 3.27 million, significantly improving economic efficiency.

[0042] The present invention also provides a dust collection and recovery method based on the dust collection and recovery device for the spray tower as described above, please refer to Figure 2 , the dust removal and recovery method comprises:

[0043] S100, the dust collector sucks the fine powder generated in the spray tower, and the fine powder enters the fine powder conveyor belt through the recovery port;

[0044] S200, the fine powder conveyor belt conveys the fine powder to the spray conveyor belt, and at the same time, the material in the spray tower enters the spray conveyor belt through the discharge port;

[0045] S300: The spraying conveyor belt conveys the fine powder and materials to a feeding silo.

[0046] Furthermore, the step S100 is specifically as follows: the dust collector sucks in the fine powder generated in the spray tower, the first pneumatic valve at the recycling port is opened, and the fine powder enters the fine powder conveyor belt through the recycling port.

[0047] Furthermore, after step S300, the process further includes: when the material formula in the spray tower is changed, closing the first pneumatic valve at the recycling port, opening the second pneumatic valve connected to the screw conveyor, and discharging the fine powder in the dust collector through the screw conveyor into the pulping tank for pulping. The pulped slurry is then extracted and ball-milled for further recycling.

[0048] In summary, the present invention discloses a dust removal and recovery device and a dust removal and recovery method for a spray tower, comprising: a spray tower, and a dust collector connected to the spray tower; a discharge port is provided on the spray tower, and a spray conveyor belt is provided below the discharge port; a recovery port is provided on the dust collector, and a fine powder conveyor belt is provided below the recovery port; the fine powder conveyor belt is used to transport the recovered fine powder in the dust collector to the spray conveyor belt. The present invention realizes direct recovery by directly manufacturing a fine powder conveyor belt below the dust collector recovery port, and directly transporting the fine powder of the same formula according to the proportion to the spray conveyor belt below the spray tower for storage and use. It is efficient, energy-saving, fast, and environmentally friendly, and does not generate secondary dust, thereby improving the efficiency of fine powder recovery.

[0049] It should be understood that the application of the present invention is not limited to the above examples. For those skilled in the art, improvements or changes can be made based on the above description. All these improvements and changes should fall within the scope of protection of the claims attached to the present invention.

Claims

1. A dust removal and recovery device for a spray tower, characterized in that: include: A spray tower, and a dust collector connected to the spray tower; the spray tower is provided with a discharge port, and a spray conveyor belt is provided below the discharge port; the dust collector is provided with a recovery port, and a fine powder conveyor belt is provided below the recovery port; the fine powder conveyor belt is used to transport the fine powder recovered in the dust collector to the spray conveyor belt; the material in the spray tower enters the spray conveyor belt through the discharge port, and the spray conveyor belt is used to transport the fine powder and material to the feed bin; the dust collector is a bag dust collector, and the recovery port is connected to a recovery pipe; one end of the fine powder conveyor belt is arranged on the recovery pipe below; a lower hopper is provided at one end of the fine powder conveyor belt close to the spraying conveyor belt, and the lower hopper is provided above the spraying conveyor belt; the dust collection and recovery device also includes: a dust suction duct; a first dust-proof shed is provided on the spraying conveyor belt, a second dust-proof shed is provided on the fine powder conveyor belt, a first dust suction pipe is provided on the first dust-proof shed, a second dust suction pipe is provided on the second dust-proof shed, and the first dust suction pipe and the second dust suction pipe are both connected to the dust suction duct; a third dust suction pipe is provided on the lower hopper, and the third dust suction pipe is connected to the dust suction duct; the spray tower and the dust collector are connected The fine powder conveyor is arranged in parallel, the fine powder conveyor belt is arranged between the spray tower and the dust collector, and the height of the fine powder conveyor belt near the dust collector is lower than the height of the end near the spray tower; the end of the spray conveyor belt away from the fine powder conveyor belt is connected to the feeding bin, and the height of the spray conveyor belt near the fine powder conveyor belt is lower than the height of the other end; the dust removal and recovery device is also provided with a screw machine and a pulping pool; the dust collector is provided with a pulping port, and the pulping port, the screw machine and the pulping pool are connected in sequence; the recovery port is provided with a first pneumatic valve, and the pulping port is provided with a second pneumatic valve; during the dust removal and recovery When collecting, open the first pneumatic valve, and the fine powder falls onto the fine powder conveyor belt through the recovery pipe, and then is transported to the spray conveyor belt through the lower hopper; when it is necessary to change the formula, close the first pneumatic valve, open the second pneumatic valve, and discharge the fine powder into the pulping pool through the screw machine for pulping, and then extract the pulped mud and ball mill it for recycling again; when the conversion is completed and the fine powder is judged to be qualified and recyclable, close the second pneumatic valve, open the first pneumatic valve, and the fine powder conveyor belt transports the fine powder to the spray conveyor belt, wherein the belt speed is controlled by the belt inverter frequency, and the fine powder is transported to the feed silo according to the ratio of fine powder to powder in the silo of 7%.

2. A dust removal and recovery method based on the dust removal and recovery device for a spray tower according to claim 1, characterized in that: The dust removal and recovery method comprises: The dust collector sucks the fine powder produced in the spray tower, and the fine powder enters the fine powder conveyor belt through the recovery port; The fine powder conveyor belt conveys the fine powder to the spray conveyor belt, and at the same time, the material in the spray tower enters the spray conveyor belt through the discharge port; The spraying conveyor belt conveys the fine powder and materials to the feeding bin.

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