Sludge and wastewater recovery device in nylon 6 production

Abstract

The utility model relates to the technical field of nylon 6 production equipment, in particular to a sludge and wastewater recovery device in nylon 6 production, which comprises a settling tank, a sludge discharge port I is arranged at the bottom of the settling tank, and a wastewater discharge port is arranged in the middle of the settling tank; the sludge outlet I is connected with a filter I through a pipeline, a filter screen I is horizontally arranged in the filter I, and a particle outlet I, an oil liquid outlet and a sludge outlet II are formed in the side part of the filter I; the first particle discharge port is located above the first filter screen, the oil liquid discharge port is located below the first filter screen, and the second sludge discharge port is located below the oil liquid discharge port; the wastewater discharge port is connected with a filter II through a pipeline, a filter screen II is vertically arranged in the filter II, a particle discharge port II is formed in the filter II, and the particle discharge port II is positioned in front of the filter screen II; according to the device, sludge, oil and nylon 6 particles in sludge wastewater can be automatically separated, the separation efficiency is high, the cost is low, and the harm of manual separation to the health of workers is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of nylon 6 production equipment, specifically a sludge and wastewater recovery device in nylon 6 production. Background Technology

[0002] During the production of Nylon 6, some losses are inevitable during equipment shutdowns for maintenance or routine transportation. Some waste particles will leak into the trenches inside the equipment. Filter cleaning and various spills and leaks of caprolactam waste liquid will also flow into these trenches, accumulating over time. These wastes are too dirty to be discharged into the wastewater system and must be manually cleaned by on-site personnel before being sent to the boiler for combustion. Manual cleaning is inefficient, costly, and harmful to workers' health. Utility Model Content

[0003] The main purpose of this utility model is to provide a sludge and wastewater recovery device in the production of nylon 6, so as to solve the problems of low efficiency, high cost and harmful health of workers in the manual cleaning of sludge and wastewater during the production of nylon 6 in the prior art.

[0004] To achieve the above objectives, this utility model provides a sludge and wastewater recovery device for nylon 6 production, including a sedimentation tank. The sedimentation tank has a sludge discharge outlet at the bottom and a wastewater discharge outlet in the middle. The sludge discharge outlet is connected to a filter through a pipe. Inside the filter, a filter screen is horizontally arranged, and on its side are a particle discharge outlet, an oil discharge outlet, and a sludge discharge outlet. The particle discharge outlet is located above the filter screen, the oil discharge outlet is located below the filter screen, and the sludge discharge outlet is located below the oil discharge outlet. The wastewater discharge outlet is connected to a filter through a pipe. Inside the filter, a filter screen is vertically arranged, and a particle discharge outlet is located on top of the filter, in front of the filter screen.

[0005] Furthermore, a side passage is provided at the top of the sedimentation tank, located on the right side of the sedimentation tank, with the bottom of the side passage sloping downwards to the right; a cleaning manhole and an observation window are provided on one side of the bottom of the side passage.

[0006] Furthermore, particle outlet one is connected to particle collection box one via a pipe, and particle outlet two is connected to particle collection box two via a pipe. Both particle collection box one and particle collection box two are connected to particle conveying pipes.

[0007] Furthermore, a filtrate outlet is provided on filter two at the rear side of filter screen two; a backflushing nozzle is provided inside filter one at the lower part of filter screen one; the filtrate outlet is connected to the backflushing nozzle through a pipe.

[0008] Furthermore, the bottom of filter one is provided with an inclined base plate, and a vibrator is provided on the base plate; sludge discharge outlet two is located at the lowest end of the base plate.

[0009] Furthermore, the oil outlet is connected to the boiler via an oil discharge pipe, and the oil discharge pipe is connected to the sedimentation tank via a circulation pipe; valves are installed on both the oil discharge pipe and the circulation pipe.

[0010] This invention, by setting up a sedimentation tank, filter one, and filter two, can automatically separate sludge, oil, and nylon 6 particles in sludge wastewater. The separation efficiency is high, the cost is low, and the health hazards to workers caused by manual separation are avoided. The separated nylon 6 particles can be recycled, the separated sludge can be discharged, and the separated oil can be sent to a boiler as fuel, thus avoiding the waste of resources. Attached Figure Description

[0011] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0012] Figure 1 This is a schematic diagram of the sludge and wastewater recovery device in the production of nylon 6 in the embodiment.

[0013] In the diagram: 1. Sedimentation tank; 101. Sludge outlet 1; 102. Wastewater outlet; 103. Side passage; 104. Cleaning manhole; 105. Sight glass; 2. Filter 1; 201. Particle outlet 1; 202. Sludge outlet 2; 203. Oil outlet; 204. Bottom plate; 3. Filter screen 1; 4. Filter 2; 401. Particle outlet 2; 402. Filtrate outlet; 5. Filter screen 2; 6. Particle collection box 1; 7. Particle collection box 2; 8. Particle conveying pipe; 9. Flushing nozzle; 10. Vibrator; 11. Oil discharge pipe; 12. Circulation pipe. Detailed Implementation

[0014] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0015] like Figure 1As shown in the embodiment of this utility model, a sludge wastewater recovery device for nylon 6 production is provided, including a sedimentation tank 1. The bottom of the sedimentation tank 1 is provided with a sludge discharge outlet 101, the middle is provided with a wastewater discharge outlet 102, and the top is connected to a desalination water pipe and a sludge wastewater pipe. The sludge discharge outlet 101 is connected to a filter 2 through a pipe. The filter 2 has a filter screen 3 horizontally arranged inside, and a particle discharge outlet 201, an oil discharge outlet 203, and a sludge discharge outlet 202 are provided on the side. Outlet 1 201 is located above filter screen 1 3, and oil outlet 203 is located below filter screen 1 3; sludge outlet 202 is located below oil outlet 203, and a conveyor belt for loading sludge onto trucks for external transport is provided on one side of sludge outlet 202; wastewater outlet 102 is connected to filter 2 4 via a pipe, and a conveying pump is provided on the pipe; filter screen 2 5 is vertically installed inside filter 2 4, and particle outlet 2 401 is provided on filter 2 4, which is located in front of filter screen 2 5.

[0016] A side channel 103 is provided at the top of the sedimentation tank 1. The side channel 103 is located on the right side of the sedimentation tank 1, and the bottom of the side channel 103 is inclined at 30° to the lower right. A cleaning manhole 104 and an observation mirror 105 are provided on one side of the bottom of the side channel 103. The cleaning manhole 104 is used to clean the floating objects on the top of the liquid in the sedimentation tank 1. First, raise the liquid level in the sedimentation tank 1 to above the bottom of the side channel 103, and then lower the liquid level in the sedimentation tank 1. The suspended objects will remain at the bottom of the side channel 103. Open the observation mirror 105, and the floating objects can be cleaned out from the cleaning manhole 104.

[0017] The bottom of the sedimentation tank 1 is conical, and a bottom manhole is provided at the bottom of the sedimentation tank 1 for periodically cleaning up dense impurities.

[0018] Particle outlet 1 201 is connected to particle collection box 1 6 via a pipe, and particle outlet 2 401 is connected to particle collection box 2 7 via a pipe. Both particle collection box 1 6 and particle collection box 2 7 are connected to particle conveying pipe 8; the material in particle conveying pipe 8 is conveyed pneumatically.

[0019] The filter 2 4 is provided with a filtrate outlet 402 located behind the filter screen 2 5; the filter 1 2 is provided with a backwash nozzle 9 located below the filter screen 1 3; the filtrate outlet 402 is connected to the backwash nozzle 9 through a pipe, and a delivery pump is provided on the pipe.

[0020] The top of filter 2 is equipped with a desalinated water pipe for cleaning; the bottom of filter 2 is equipped with an inclined base plate 204, on which a vibrator 10 is installed; the sludge discharge outlet 202 is located at the lowest end of the base plate 204.

[0021] The oil outlet 203 is connected to the boiler via the oil outlet pipe 11, which transports the oil to the boiler for combustion. The oil outlet pipe 11 is connected to the sedimentation tank 1 via the circulation pipe 12. Valves are installed on both the oil outlet pipe 11 and the circulation pipe 12. The caprolactam and nylon 6 content of the liquid in the oil outlet pipe 11 are detected. If the oil content is qualified, it is introduced into the boiler as fuel.

[0022] The working principle of the above embodiment is as follows: sludge wastewater from nylon 6 production is introduced into sedimentation tank 1. After settling, the sludge settles at the bottom of the sedimentation channel, separating from the upper liquid. The upper liquid is introduced into filter 4 to filter out and recover the nylon 6 particles. The filtrate enters filter 2 as backwash liquid. The sludge is transported to filter 2 through a pipeline to filter out and recover the nylon 6 particles. The filtered sludge is discharged, and the filtered oil is introduced into the boiler for combustion.

[0023] This invention, by setting up a sedimentation tank, filter one, and filter two, can automatically separate sludge, oil, and nylon 6 particles in sludge wastewater. The separation efficiency is high, the cost is low, and the health hazards to workers caused by manual separation are avoided. The separated nylon 6 particles can be recycled, the separated sludge can be discharged, and the separated oil can be sent to a boiler as fuel, thus avoiding the waste of resources.

[0024] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A sludge and wastewater recovery device for nylon 6 production, characterized in that, The system includes a sedimentation tank (1), which has a sludge discharge outlet (101) at the bottom and a wastewater discharge outlet (102) in the middle. The sludge discharge outlet (101) is connected to a filter (2) via a pipe. The filter (2) has a filter screen (3) horizontally arranged inside and a particle discharge outlet (201), an oil discharge outlet (203), and a sludge discharge outlet (202) on its side. The particle discharge outlet (201) is located above the filter screen (3), the oil discharge outlet (203) is located below the filter screen (3), and the sludge discharge outlet (202) is located below the oil discharge outlet (203). The wastewater discharge outlet (102) is connected to a filter (4) via a pipe. The filter (4) has a filter screen (5) vertically arranged inside and a particle discharge outlet (401) is arranged on the filter (4). The particle discharge outlet (401) is located in front of the filter screen (5).

2. The sludge and wastewater recovery device in the production of nylon 6 as described in claim 1, characterized in that, The sedimentation tank (1) is provided with a side channel (103) at the top. The side channel (103) is located on the right side of the sedimentation tank (1). The bottom of the side channel (103) is inclined to the lower right. A cleaning manhole (104) and an observation mirror (105) are provided on one side of the bottom of the side channel (103).

3. The sludge and wastewater recovery device in the production of nylon 6 as described in claim 1, characterized in that, The first particle outlet (201) is connected to the first particle collection box (6) via a pipe, and the second particle outlet (401) is connected to the second particle collection box (7) via a pipe. Both the first particle collection box (6) and the second particle collection box (7) are connected to a particle conveying pipe (8).

4. The sludge and wastewater recovery device in the production of nylon 6 as described in claim 1, characterized in that, The filter 2 (4) is provided with a filtrate outlet (402) located behind the filter screen 2 (5); the filter 1 (2) is provided with a backflushing nozzle (9) located below the filter screen 1 (3); the filtrate outlet (402) is connected to the backflushing nozzle (9) through a pipe.

5. The sludge and wastewater recovery device in the production of nylon 6 as described in claim 1, characterized in that, The bottom of the filter one (2) is provided with an inclined base plate (204), and a vibrator (10) is provided on the base plate (204); the sludge discharge outlet two (202) is located at the lowest end of the base plate (204).

6. The sludge and wastewater recovery device in the production of nylon 6 as described in claim 1, characterized in that, The oil outlet (203) is connected to a boiler via an oil discharge pipe (11), and the oil discharge pipe (11) is connected to a sedimentation tank (1) via a circulation pipe (12); valves are provided on both the oil discharge pipe (11) and the circulation pipe (12).

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