Multistage water spray dust tail gas scrubbing tower

Abstract

The utility model relates to a kind of multi-stage water spray's dust tail gas washing tower, exhaust fan, dust tail gas washing tower, washing water storage tank are sequentially communicated, washing water spray pipeline and multi-stage spray water pipeline are respectively communicated with the middle and top of dust tail gas washing tower, backflush pipeline is connected with dust tail gas washing tower bottom and tower bottom liquid discharge pipeline respectively in two ways, dust tail gas washing tower bottom is communicated with washing water storage tank by liquid discharge pipeline;Washing water spray pipeline and multi-stage spray water pipeline are respectively provided with regulating valve group.The advantage lies in, the utility model uses original washing water spray pipeline and newly added multi-stage spray water pipeline to carry out multiple washing recovery to dust in tail gas, washing water after dust washing enters washing water storage tank by liquid discharge pipeline for other production process to use again, not only conducive to reducing production site dust accumulation and reducing dust explosion risk, but also conducive to increasing yield and reducing consumption, developing circular economy.

Description

Technical Field

[0001] This utility model belongs to the field of chemical technology and relates to a multi-stage water spray dust exhaust gas scrubbing tower. Background Technology

[0002] In chemical production processes, single-pipeline scrubbing water spraying cannot meet the needs of dust removal, leading to dust accumulation at the vent outlet. This poses both a risk of dust explosion and environmental pollution. Furthermore, large amounts of dust accumulating at the bottom of the scrubbing tower can easily clog the drain line, affecting daily operation. Therefore, how to effectively scrub dust exhaust gases has become an urgent problem to be solved. Utility Model Content

[0003] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a multi-stage water spray dust exhaust gas scrubbing tower.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A multi-stage water spray dust exhaust gas scrubbing tower includes a dust exhaust gas scrubbing tower, a scrubbing water spray control valve assembly, a multi-stage spray water control valve assembly, an exhaust fan, a main scrubbing water pipeline, a backwash valve, a drain pipeline, a scrubbing water storage tank, and a sewer system. The dust exhaust gas scrubbing tower includes a scrubbing water spray device and a maintenance manhole located in the middle, a multi-stage scrubbing water spray device located at the top, and a maintenance blind flange and a high-level probe located at the bottom. The main scrubbing water pipeline includes scrubbing water spray... The system includes a scrubbing pipeline, a multi-stage spray water pipeline, and a backflushing pipeline. The scrubbing water spray pipeline is connected to the scrubbing water spray device in the middle of the dust exhaust gas scrubbing tower via the scrubbing water spray control valve group. The multi-stage spray water pipeline is connected to the multi-stage scrubbing water spray device at the top of the dust exhaust gas scrubbing tower via the multi-stage spray water control valve group. The backflushing pipeline is divided into two branches after passing through the backflushing valve, and is respectively connected to the bottom of the dust exhaust gas scrubbing tower and the drain pipeline.

[0006] Preferably, the exhaust fan is used to send the dust exhaust gas to the bottom of the dust exhaust gas scrubbing tower.

[0007] Preferably, the washing water spray control valve group is installed on the washing water spray pipeline connected to the washing water spray device in the middle of the dust exhaust gas scrubbing tower.

[0008] Preferably, the washing water spray control valve group includes a first automatic regulating valve, and a first gate valve and a first bypass shut-off valve are provided at both ends of the first automatic regulating valve; wherein, the first bypass shut-off valve is connected in parallel to both ends of the first automatic regulating valve and the first gate valve.

[0009] Preferably, the multi-stage spray water control valve group is installed on the multi-stage spray water pipeline connected to the multi-stage washing water spray device at the top of the dust exhaust gas scrubbing tower.

[0010] Preferably, the multi-stage spray water control valve group includes a second automatic regulating valve, with a second gate valve and a second bypass shut-off valve at each of the front and rear ends of the second automatic regulating valve; wherein the second bypass shut-off valve is connected in parallel to the two ends of the second automatic regulating valve and the second gate valve.

[0011] Preferably, a blind flange for maintenance is provided on the drain line, and the blind flange for maintenance work is used.

[0012] Preferably, the blind flange for maintenance is provided with two pipelines, and each pipeline is equipped with a manual valve. One pipeline enters the sewer through the manual valve for the discharge of washing water during maintenance operations; the other pipeline is connected to the washing water storage tank through the manual valve for the recycling of washing water.

[0013] Due to the adoption of the above technical solution, the beneficial effects obtained by this utility model include:

[0014] 1. This utility model utilizes the original washing water spray pipeline and the newly added multi-stage spray water pipeline to wash and recover dust in the exhaust gas multiple times, so that the washing water after dust washing can enter the washing water storage tank for reuse in other production processes.

[0015] 2. This utility model not only helps to reduce dust accumulation at the production site and reduce the risk of dust explosion, but also helps to increase production and reduce consumption, develop a circular economy, and promote green environmental protection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of an embodiment of the multi-stage water spray dust exhaust gas scrubbing tower of this utility model.

[0017] The attached figures are labeled as follows:

[0018] 1. Dust and exhaust gas scrubbing tower;

[0019] 1-1. Washing water spray device; 1-2. Multi-stage washing water spray device;

[0020] 1-3. Manhole for maintenance; 1-4. Blind flange for maintenance; 1-5. High liquid level probe;

[0021] 2. Washing water spray control valve assembly;

[0022] 2-1, First automatic regulating valve; 2-2, First gate valve; 2-3, First bypass shut-off valve;

[0023] 3. Multi-stage spray water control valve assembly;

[0024] 3-1, Second automatic regulating valve; 3-2, Second gate valve; 3-3, Second bypass shut-off valve;

[0025] 4. Exhaust fan; 5. Main washing water pipeline; 6. Washing water spray pipeline;

[0026] 7. Multi-stage sprinkler water pipeline; 8. Backflush pipeline; 9. Backflush valve; 10. Manual valve;

[0027] 11. Drainage pipeline; 12. Washing water storage tank; 13. Sewer. Detailed Implementation

[0028] Please see Figure 1 As shown, this device mainly provides a multi-stage water spray dust exhaust gas scrubbing tower to solve the problem that dust cannot be completely washed and recovered in the prior art. Based on this, the device includes a dust exhaust gas scrubbing tower 1, a washing water spray control valve group 2, a multi-stage spray water control valve group 3, an exhaust fan 4, a washing water main pipeline 5, a backflushing valve 9, a drain pipeline 11, a washing water storage tank 12, and a sewer 13. Among them, the washing water main pipeline 5 includes a washing water spray pipeline 6, a newly added multi-stage spray water pipeline 7, and a backflushing pipeline 8. In this embodiment, the dust exhaust gas is sent to the bottom of the dust exhaust gas scrubbing tower 1 by the exhaust fan 4, the washing water spray pipeline 6 enters from the middle of the dust exhaust gas scrubbing tower 1 to contact the dust exhaust gas, and the newly added multi-stage spray water pipeline 7 enters from the top of the dust exhaust gas scrubbing tower and splits into multiple paths to contact the dust exhaust gas. The system allows for multiple washing and recovery of dust in the exhaust gas through contact with the air. Specifically, the main washing water pipeline 5 is divided into three branches via a manual main valve. One branch is the washing water spray pipeline 6, which connects to the washing water spray device 1-1 in the middle of the dust exhaust gas scrubbing tower via the washing water spray control valve group 2. Another branch is the newly added multi-stage spray water pipeline 7, which connects to the newly added multi-stage washing water spray device 1-2 at the top of the dust exhaust gas scrubbing tower via the multi-stage spray water control valve group 3. The third branch is the backflushing pipeline 8, which connects to the bottom of the dust exhaust gas scrubbing tower and the bottom drain pipeline 11 of the dust exhaust gas scrubbing tower via the backflushing valve 9. This multi-branch pipeline system ensures thorough washing of the dust exhaust gas, preventing dust from accumulating at the bottom of the scrubbing tower and causing blockage of the drain pipeline due to incomplete washing.

[0029] In this embodiment, the dust exhaust gas scrubbing tower 1 includes a scrubbing water spray device 1-1, a maintenance manhole 1-3, a multi-stage scrubbing water spray device 1-2, a maintenance blind flange 1-4, and a high-level probe 1-5. The newly added multi-stage scrubbing water spray device 1-2 is located at the top of the dust exhaust gas scrubbing tower 1, while the scrubbing water spray device 1-1 is located in the middle of the dust exhaust gas scrubbing tower 1 and is used for dust scrubbing. A maintenance manhole 1-5 is also provided at the top of the dust exhaust gas scrubbing tower, and a maintenance blind flange 1-4 and a high-level probe 1-5 are provided at the bottom of the dust exhaust gas scrubbing tower. The maintenance blind flange 1-4 and the high-level probe 1-5 are used for maintenance and cleaning operations and to determine whether dust accumulation and blockage have occurred at the bottom of the dust exhaust gas scrubbing tower, respectively.

[0030] In this embodiment, the washing water spray control valve group 2 is installed on the washing water spray pipeline 6 connected to the washing water spray device in the middle of the dust exhaust gas scrubbing tower; wherein, the washing water spray control valve group 2 includes a first automatic regulating valve 2-1, which, under the control of the PLC system, can adjust the valve opening according to the flow rate set value. The first automatic regulating valve 2-1 is provided with a first gate valve 2-2 at each end before and after it, and a first bypass shut-off valve 2-3 is also provided (the bypass shut-off valve's function is to protect the main valve and prevent excessively high or unstable medium pressure from causing...). Damage caused by the main valve; and it is usually installed next to the main valve, through which the flow rate can be manually adjusted to achieve the purpose of stabilizing the pressure; at the same time, the bypass shut-off valve can also be used as a temporary flow control valve when the main valve needs to be repaired or replaced); wherein, the first bypass shut-off valve 2-3 is connected in parallel to the two ends of the first automatic regulating valve 2-1 and the first gate valve 2-2; during normal operation, the first gate valve 2-2 is open and the first bypass shut-off valve 2-3 is closed; when the first automatic regulating valve 2-1 is under maintenance, the first gate valve 2-2 is closed and the first bypass shut-off valve 2-3 is open.

[0031] In this embodiment, the multi-stage spray water control valve group 3 is installed on the multi-stage spray water pipeline 7 connected to the multi-stage washing water spray device at the top of the dust exhaust gas scrubbing tower. The multi-stage spray water control valve group 3 includes a second automatic regulating valve 3-1. Under the control of the PLC system, the second automatic regulating valve 3-1 can adjust the valve opening according to the flow rate setting value of the newly added multi-stage spray water pipeline 7. A second gate valve 3-2 is provided at each end before and after the second automatic regulating valve 3, and a second bypass shut-off valve 3-3 is also provided. The second bypass shut-off valve 3-3 is connected in parallel to both ends of the second automatic regulating valve 3-1 and the second gate valve 3-2. During normal operation, the second gate valve 3-2 is open and the second bypass shut-off valve 3-3 is closed. When the second automatic regulating valve 3-1 is under maintenance, the second gate valve 3-2 is closed and the second bypass shut-off valve 3-3 is open.

[0032] In this embodiment, the backflushing pipeline 8 is divided into two pipelines via the backflushing valve 9. One pipeline is connected to the bottom drain pipeline 11 of the dust exhaust gas scrubbing tower, and the other pipeline is connected to the bottom of the dust exhaust gas scrubbing tower for backflushing operations at different positions at the bottom of the dust exhaust gas scrubbing tower 1.

[0033] In this embodiment, a maintenance blind flange 1-4 is provided on the drain line 11, and the maintenance blind flange 1-4 is used for maintenance operations. The maintenance blind flange 1-4 is also provided with two pipelines, and a manual valve 10 is provided on both pipelines. One pipeline enters the sewer 13 through the manual valve 10 for the discharge of washing water during maintenance operations. The other pipeline is connected to the washing water storage tank 12 through the manual valve 10. The washing water storage tank 12 can cooperate with the manual valve to recover the washing water after dust washing, so as to reuse it for other production processes.

[0034] It should be noted that this utility model utilizes the existing washing water spray pipeline and the newly added multi-stage spray water pipeline to wash and recover dust in the exhaust gas multiple times. This allows the washing water after dust washing to enter the washing water storage tank for reuse in other production processes. On the one hand, this helps reduce dust accumulation at the production site and lowers the risk of dust explosions; on the other hand, it helps increase production and reduce consumption, develop a circular economy, and promote green environmental protection.

[0035] The foregoing descriptions and embodiments are provided to enable those skilled in the art to understand and apply this invention. Those skilled in the art will readily make various modifications to these contents and apply the general principles described herein to other embodiments without inventive effort. Therefore, this invention is not limited to the foregoing descriptions and embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this invention without departing from its scope should be within the protection scope of this invention.

Claims

1. A multi-stage water spray dust exhaust gas scrubbing tower, characterized in that, It includes a dust exhaust gas scrubbing tower, a scrubbing water spray control valve group, a multi-stage spray water control valve group, an exhaust fan, a main scrubbing water pipeline, a backwash valve, a drain pipeline, a scrubbing water storage tank, and a sewer; the dust exhaust gas scrubbing tower includes a scrubbing water spray device and a maintenance manhole located in the middle, a multi-stage scrubbing water spray device located at the top, and a maintenance blind flange and a high liquid level probe located at the bottom; The main washing water pipeline includes a washing water spray pipeline, a multi-stage spray water pipeline, and a backflushing pipeline. The washing water spray pipeline is connected to the washing water spray device in the middle of the dust exhaust gas scrubbing tower via the washing water spray control valve group. The multi-stage spray water pipeline is connected to the multi-stage washing water spray device at the top of the dust exhaust gas scrubbing tower via the multi-stage spray water control valve group. The backflushing pipeline is divided into two branches after passing through the backflushing valve, and is respectively connected to the bottom of the dust exhaust gas scrubbing tower and the drain pipeline.

2. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 1, characterized in that, The exhaust fan is used to send the dust exhaust gas to the bottom of the dust exhaust gas scrubbing tower.

3. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 1, characterized in that, The washing water spray control valve group is installed on the washing water spray pipeline connected to the washing water spray device in the middle of the dust exhaust gas scrubbing tower.

4. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 3, characterized in that, The washing water spray control valve group includes a first automatic regulating valve, with a first gate valve and a first bypass shut-off valve at each of the front and rear ends of the first automatic regulating valve; wherein the first bypass shut-off valve is connected in parallel to the two ends of the first automatic regulating valve and the first gate valve.

5. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 1, characterized in that, The multi-stage spray water control valve group is installed on the multi-stage spray water pipeline connected to the multi-stage washing water spray device at the top of the dust exhaust gas scrubbing tower.

6. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 5, characterized in that, The multi-stage spray water control valve group includes a second automatic regulating valve, with a second gate valve at each end of the second automatic regulating valve and a second bypass shut-off valve; wherein the second bypass shut-off valve is connected in parallel to the two ends of the second automatic regulating valve and the second gate valve.

7. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 1, characterized in that, The drain line is equipped with a blind flange for maintenance, which is used for maintenance work.

8. The multi-stage water spray dust exhaust gas scrubbing tower according to claim 7, characterized in that, The blind flange for maintenance is equipped with two pipelines, each with a manual valve. One pipeline enters the sewer through the manual valve for the discharge of washing water during maintenance operations; the other pipeline is connected to the washing water storage tank through the manual valve for the recycling of washing water.

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