Environment-friendly treatment device for wastewater and waste gas in waterproof roll production

Abstract

The invention belongs to the technical field of wastewater and waste gas treatment, and particularly relates to a waterproof roll production wastewater and waste gas environment-friendly treatment device which comprises a water washing tower and a treatment box, a heat exchange cavity and a wastewater treatment cavity are sequentially formed in the treatment box from top to bottom, and heat exchange mechanisms are arranged in the heat exchange cavity at equal intervals in the front-back direction of the heat exchange cavity; an aeration mechanism is arranged in the wastewater treatment cavity; wherein the heat exchange mechanism comprises S-shaped gas inlet pipes, and the S-shaped gas inlet pipes are distributed at equal intervals in the front-back direction of the heat exchange cavity; the S-shaped liquid inlet pipe is arranged on the outer side of the S-shaped gas inlet pipe in a sleeving manner; the aeration mechanism comprises runner plates which are distributed at equal intervals along the height direction in the wastewater treatment cavity; the fixed plates are fixed at equal intervals in the front-back direction of the runner plate; and the aeration pipe placing grooves are formed between the two adjacent fixing plates. In the split-flow treatment process of waste water and waste gas, the waste gas and the waste water during stirring heat exchange are utilized, and the regional temperature difference is reduced.

Description

Technical Field

[0001] This invention belongs to the field of wastewater and waste gas treatment technology, specifically an environmental protection treatment device for wastewater and waste gas from waterproof membrane production. Background Technology

[0002] Waterproof membranes are waterproof materials made by impregnating a base material with asphalt-based or polymer-based waterproofing materials. They are mainly used in building walls, roofs, tunnels, highways, and landfills to prevent rainwater and groundwater seepage. The production of waterproof membranes generates wastewater and waste gas. The waste gas mainly comes from the drying process and contains some low-boiling-point organic compounds. The wastewater mainly comes from the cooling process of the molding stage; it is low-grade wastewater with COD, BOD, SS, and a small amount of sludge as the main pollutants. These waste gases and wastewater can cause some environmental pollution.

[0003] In the existing technology, when treating the wastewater and waste gas generated during the production of waterproof membrane, the wastewater and waste gas are usually separated into some substances after passing through a heat exchanger. Then, the waste gas is treated through a water washing tower before being discharged, while the wastewater is discharged after a series of treatments such as aeration and sedimentation. However, during heat exchange, the gas typically passes through the heat exchange tubes, utilizing heat conduction for heat exchange. Wastewater and exhaust gas often exchange heat in relatively stable flow environments. Therefore, the temperature of the wastewater gradually decreases from near the outer wall of the heat exchange tube to away from it, while the exhaust gas gradually decreases from the center towards the inner wall of the heat exchange tube. Although a stirring mechanism can be used to agitate the wastewater, the exhaust gas still exhibits a gradual temperature decrease from the center towards the inner wall of the heat exchange tube, affecting the heat exchange efficiency. Simultaneously, when aerating the liquid phase, aeration is generally performed from the bottom or side of the liquid phase through aeration pipes. However, the area affected by the aeration pipes is limited, and since the aeration effect is better closer to the aeration port, the liquid phase cannot pass through the aeration port sequentially during the treatment process, thus affecting the aeration effect. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an environmentally friendly wastewater and waste gas treatment device for waterproof membrane production. During the process of diverting and treating wastewater and waste gas, the waste gas and wastewater entering the S-type gas heat exchange tube and S-type liquid are stirred to reduce the regional temperature difference between the S-type gas heat exchange tube and the S-type liquid entering the tube. At the same time, the liquid phase is guided by the baffle plate group, and a small amount of liquid phase is aerated through the aeration port, thereby improving the aeration effect of the liquid phase.

[0005] This invention is achieved through the following technical solution: An environmentally friendly treatment device for wastewater and waste gas from waterproof membrane production includes a washing tower and a treatment tank. The treatment tank contains a heat exchange chamber and a wastewater treatment chamber arranged sequentially from top to bottom. The heat exchange chamber contains heat exchange mechanisms spaced at equal intervals along its front-to-back direction, and the wastewater treatment chamber contains an aeration mechanism. The heat exchange mechanism includes: S-type gas heat exchange tubes are evenly distributed along the front and back direction of the heat exchange chamber, and the top of each S-type gas heat exchange tube extends to the top of the treatment box and connects to the exhaust gas inlet main pipe. The S-shaped liquid inlet pipe is sleeved on the outside of the S-shaped gas heat exchanger pipe, and the top end of the S-shaped liquid inlet pipe extends to the top of the treatment tank and is connected to the wastewater inlet main pipe. The bottom end of the S-shaped liquid inlet pipe is connected to the wastewater collection pipe outside the treatment tank, and the other end of the wastewater collection pipe is connected to the top end of the S-shaped liquid inlet pipe. An exhaust pipe, one end of which is connected to the bottom end of the S-shaped gas heat exchange tube, and the top end of the exhaust pipe extends to the top of the treatment box and is connected to the gas collection pipe, and the other end of the gas collection pipe extends into the interior of the water washing tower. A disturbance component is provided, which is distributed at equal intervals along the length of the S-shaped gas heat exchange tube and is used to agitate the gas inside the S-shaped gas heat exchange tube and the liquid entering the tube from the S-shaped liquid. The aeration mechanism includes: The flow channel plates are evenly distributed along the height direction inside the wastewater treatment chamber, forming flow channels inside the wastewater treatment chamber; A fixing plate is fixed at equal intervals along the front and back direction of the flow channel plate, dividing the flow channel inside the wastewater treatment chamber into several S-shaped flow channels; An aeration pipe placement slot is provided between two adjacent fixed plates; An aeration pipe is installed inside the aeration pipe placement groove, and aeration ports extending into the S-shaped flow channel are equally spaced along the axial direction on the aeration pipe. One end of the aeration pipe extends to the outside of the wastewater treatment chamber and is connected to the air inlet box.

[0006] Preferably, the bottom end of the S-shaped gas heat exchanger tube is also connected to a liquid guide tube, and the other end of the liquid guide tube is connected to a wastewater collection pipe.

[0007] Preferably, the top of the wastewater collection pipe is connected to a flocculant inlet pipe for adding flocculant.

[0008] Preferably, a gas guide tube is connected to the arc-shaped structure of the S-shaped liquid inlet pipe, and the other end of the gas guide tube is connected to the gas collecting pipe.

[0009] Preferably, the disturbance component includes a rotating ring rotatably connected inside the S-shaped gas heat exchange tube, with inner blades fixed at equal intervals along the circumferential direction on the inner side of the rotating ring, and outer blades fixed at equal intervals along the circumferential direction on the outer side of the rotating ring, and the outer blades being located inside the S-shaped liquid inlet tube.

[0010] Preferably, the interior of the S-shaped flow channel is fixed with several sets of baffle plates at equal intervals along the flow direction of the wastewater, and the baffle plate sets are formed by combining baffle plates that are respectively fixed on both sides of the S-shaped flow channel and distributed at an incline; wherein, the baffle plate is formed by combining an incline portion fixed to both sides of the S-shaped flow channel and a vertical portion parallel to the fixed plate.

[0011] Preferably, a discharge pipe is connected to the bottom of one side of the wastewater treatment chamber.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention achieves the treatment effect of separating wastewater and waste gas by passing the waste gas inlet pipe and the wastewater inlet pipe into the S-shaped gas heat exchange pipe and the S-shaped liquid inlet pipe that are equally spaced, thereby improving the treatment efficiency. At the same time, the liquid phase that enters the wastewater treatment chamber through the wastewater collection pipe enters into each of the S-shaped flow channels formed by two fixed plates, thereby separating the liquid phase and improving the aeration effect of the liquid phase. (2) The present invention drives the rotating ring to rotate by the flow of waste gas and wastewater, and uses the inner and outer blades of the inner and outer sides of the rotating ring to stir the S-type gas heat exchange tube and the S-type liquid inlet tube, thereby disrupting the originally stable flow environment, reducing the regional temperature difference inside the S-type gas heat exchange tube and the S-type liquid inlet tube, and improving the heat exchange effect. (3) In the process of liquid phase flow, the present invention guides the liquid phase through the baffle plate group, so that the liquid phase flows in the S-shaped flow channel according to the route formed by the baffle plate group. At the same time, the vertical part of the baffle plate is designed so that the diameter of the liquid phase decreases when it flows to the position directly opposite the aeration port, so that the aeration port can aerate the liquid phase flowing through it. Since the diameter is reduced at the position directly opposite the aeration port, the flow rate of the liquid phase will also decrease. Then, the aeration port aerates a small amount of liquid phase, thereby improving the aeration effect of the liquid phase. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the processing box of the present invention; Figure 3 This is a schematic diagram of the internal structure of the heat exchange cavity of the present invention; Figure 4 for Figure 3Enlarged structural diagram at point A; Figure 5 This is a schematic diagram of the internal structure of the wastewater treatment chamber of the present invention; Figure 6 This is a schematic diagram of the S-shaped flow channel of the present invention.

[0014] In the diagram: 100, Water washing tower; 101, Gas collecting pipe; 200, Treatment box; 201, Heat exchange chamber; 202, Flocculant inlet pipe; 203, Liquid guide pipe; 204, Wastewater collecting pipe; 205, Discharge pipe; 206, Wastewater treatment chamber; 300, Heat exchange mechanism; 301, Waste gas inlet main pipe; 302, Wastewater inlet main pipe; 303, Gas guide pipe; 304, Exhaust pipe; 305, S-shaped gas heat exchange pipe; 306, S-shaped liquid inlet pipe; 307, Rotating ring; 308, Inner blade; 309, Outer blade; 400, Aeration mechanism; 401, Air inlet box; 402, Aeration pipe; 403, Fixed plate; 404, Baffle plate assembly; 405, Aeration port; 406, Aeration pipe placement slot; 407, S-shaped flow channel; 408, Flow channel plate. Detailed Implementation

[0015] The embodiments of the present invention are described in detail below. These embodiments are implemented based on the technical solution of the present invention, and provide detailed implementation methods and specific operation processes. However, the scope of protection of the present invention is not limited to the following embodiments. In the description of the present invention, words such as "front", "rear", "left", and "right" that indicate orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0016] An environmentally friendly wastewater and waste gas treatment device for waterproof membrane production includes a water washing tower 100 and a treatment tank 200. The treatment tank 200 has a heat exchange chamber 201 and a wastewater treatment chamber 206 arranged sequentially from top to bottom inside. Heat exchange mechanisms 300 are evenly spaced along the front-to-back direction inside the heat exchange chamber 201, and an aeration mechanism 400 is arranged inside the wastewater treatment chamber 206. The heat exchange mechanism 300 includes: S-type gas heat exchange tubes 305 are evenly distributed along the front and rear direction of the heat exchange chamber 201, and the top of each S-type gas heat exchange tube 305 extends to the top of the treatment box 200 and connects to the exhaust gas inlet main pipe 301. The S-type liquid inlet pipe 306 is sleeved on the outside of the S-type gas heat exchanger pipe 305, and the top end of the S-type liquid inlet pipe 306 extends to the top end of the treatment tank 200 and connects to the wastewater inlet main pipe 302. The bottom end of the S-type liquid inlet pipe 306 is connected to the wastewater collection pipe 204 outside the treatment tank 200, and the other end of the wastewater collection pipe 204 is connected to the top end of the S-type liquid inlet pipe 306. The exhaust pipe 304 has one end connected to the bottom end of the S-type gas heat exchange tube 305, and the top end of the exhaust pipe 304 extends to the top end of the processing box 200 and is connected to the gas collection pipe 101, and the other end of the gas collection pipe 101 extends into the interior of the water washing tower 100. The disturbance components are evenly distributed along the length of the S-type gas heat exchange tube 305 and are used to agitate the gas in the S-type gas heat exchange tube 305 and the liquid in the S-type liquid inlet tube 306. Aeration unit 400 includes: The flow channel plate 408 is evenly distributed along the height direction inside the wastewater treatment chamber 206, forming a flow channel inside the wastewater treatment chamber 206; The fixing plate 403 is fixed at equal intervals along the front and rear direction of the flow channel plate 408, dividing the flow channel inside the wastewater treatment chamber 206 into several S-shaped flow channels 407. Aeration pipe placement slot 406 is provided between two adjacent fixed plates 403; The aeration pipe 402 is installed inside the aeration pipe placement trough 406, and aeration ports 405 are evenly spaced along the axial direction and extend into the S-shaped flow channel 407. One end of the aeration pipe 402 extends to the outside of the wastewater treatment chamber 206 and is connected to the air inlet box 401.

[0017] like Figure 2 and Figure 3 As shown, in this embodiment, the bottom end of the S-shaped gas heat exchange tube 305 is also connected to a liquid guide tube 203, and the other end of the liquid guide tube 203 is connected to the wastewater collection tube 204. After heat exchange, the waste gas will be liquefied, and the liquefied water enters the interior of the wastewater collection tube 204 from the liquid guide tube 203.

[0018] like Figure 2 and Figure 3 As shown, in this embodiment, the top of the wastewater collection pipe 204 is connected to a flocculant inlet pipe 202 for adding flocculant, and flocculant is added to the liquid phase through the flocculant inlet pipe 202.

[0019] like Figures 1 to 3As shown, in this embodiment, a gas guide pipe 303 is connected to the arc-shaped structure of the S-type liquid inlet pipe 306, and the other end of the gas guide pipe 303 is connected to the gas collection pipe 101. The waste gas inside the S-type gas heat exchange pipe 305 exchanges heat with the wastewater inside the S-type liquid inlet pipe 306, thereby raising the temperature of the wastewater and evaporating and separating the low-boiling-point organic components. The wastewater then enters the gas collection pipe 101 through the gas guide pipe 303 and then enters the water washing tower 100 for treatment.

[0020] like Figure 3 and Figure 4 As shown, in this embodiment, the disturbance component includes a rotating ring 307 rotatably connected inside the S-shaped gas heat exchange tube 305. Inner blades 308 are fixed at equal intervals along the circumferential direction on the inner side of the rotating ring 307, and outer blades 309 are fixed at equal intervals along the circumferential direction on the outer side of the rotating ring 307. The outer blades 309 are located inside the S-shaped liquid inlet pipe 306. The flow of waste gas and wastewater drives the rotating ring 307 to rotate. The inner blades 308 and outer blades 309 on the inner and outer sides of the rotating ring 307 agitate the interior of the S-shaped gas heat exchange tube 305 and the S-shaped liquid inlet pipe 306, thereby disrupting the originally stable flow environment, reducing the regional temperature difference inside the S-shaped gas heat exchange tube 305 and the S-shaped liquid inlet pipe 306, and improving the heat exchange effect.

[0021] like Figure 5 and Figure 6 As shown, in this embodiment, several sets of baffle plate groups 404 are fixed at equal intervals inside the S-shaped flow channel 407 along the flow direction of wastewater. The baffle plate group 404 is formed by combining baffles that are inclinedly distributed and fixed on both sides of the S-shaped flow channel 407. The baffle is formed by combining inclined parts fixed on both sides of the S-shaped flow channel 407 and vertical parts parallel to the fixed plate 403. The baffle plate group 404 guides the liquid phase, so that the liquid phase flows inside the S-shaped flow channel 407 along the path formed by the baffle plate group 404. At the same time, the design of the vertical part on the baffle plate makes the diameter of the liquid phase decrease when it flows to the position directly opposite the aeration port 405. This allows the aeration port 405 to aerate the liquid phase flowing through it. Since the diameter is reduced at the position directly opposite the aeration port 405, the flow rate of the liquid phase is also reduced. Aeration of a small amount of liquid phase is then carried out through the aeration port 405, thereby improving the aeration effect of the liquid phase.

[0022] In this embodiment, a discharge pipe 205 is connected to the bottom of one side of the wastewater treatment chamber 206, and the aerated liquid phase is discharged from the discharge pipe 205.

[0023] In operation, the waste gas and wastewater generated during the production of waterproof membrane are respectively introduced into the interior of S-shaped gas heat exchange pipes 305 and S-shaped liquid inlet pipes 302 through the waste gas inlet main pipe 301 and the wastewater inlet main pipe 302, respectively. This achieves the effect of separating wastewater and waste gas, improving treatment efficiency. During the flow of waste gas and wastewater inside the S-shaped gas heat exchange pipes 305 and S-shaped liquid inlet pipes 306, the waste gas inside the S-shaped gas heat exchange pipe 305 exchanges heat with the wastewater inside the S-shaped liquid inlet pipe 306, causing the wastewater to heat up and evaporate and separate the low-boiling-point organic components. The wastewater then enters the gas collection pipe 101 through the gas guide pipe 303, and then enters the water washing tower 100 for further treatment. (The treatment of waste gas by the water scrubbing tower 100 is a well-known technology and will not be described in detail here.) Then, the wastewater enters the wastewater treatment chamber 206 from the wastewater collection pipe 204. At the same time, the waste gas will be liquefied after heat exchange. The liquefied water enters the wastewater collection pipe 204 from the liquid guide pipe 203. The remaining waste gas will enter the water scrubbing tower 100 for treatment through the exhaust pipe 304 and the gas collection pipe 101. During the heat exchange process, the flow of waste gas and wastewater drives the rotating ring 307 to rotate. The inner blades 308 and outer blades 309 on the inner and outer sides of the rotating ring 307 agitate the S-type gas heat exchange tube 305 and the S-type liquid inlet pipe 306, disrupting the originally stable flow environment and reducing the regional temperature difference inside the S-type gas heat exchange tube 305 and the S-type liquid inlet pipe 306. For example, during heat exchange in a stable flow environment, the temperature of wastewater gradually decreases from near the outer wall of the S-type gas heat exchange tube 305 to away from the outer wall of the S-type gas heat exchange tube 305, while the temperature of waste gas gradually decreases from the center to the inner wall of the S-type gas heat exchange tube 305 inside the tube, thus affecting the heat exchange effect. Then, the liquid phase entering the wastewater treatment chamber 206 through the wastewater collection pipe 204 enters the S-shaped flow channels 407 formed by two fixed plates 403, thereby diverting the liquid phase and improving the aeration effect. During the flow of the liquid phase inside the S-shaped flow channels 407, air is supplied to the air inlet box 401 through an external aeration source, and then aerated through the aeration pipe 402 and aeration port 405. In this process, the aeration effect is better for the liquid phase closer to the aeration port 405. During the process, the liquid phase is guided by the baffle assembly 404, so that the liquid phase flows inside the S-shaped flow channel 407 along the path formed by the baffle assembly 404. At the same time, the vertical design of the baffle plate reduces the diameter of the liquid phase when it flows to the position directly opposite the aeration port 405, so that the aeration port 405 can directly aerate the liquid phase flowing through it. Since the diameter is reduced at the position directly opposite the aeration port 405, the flow rate of the liquid phase is also reduced. Then, a small amount of liquid phase is aerated through the aeration port 405, thereby improving the aeration effect of the liquid phase.

[0024] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An environmentally friendly treatment device for waterproofing membrane production wastewater and exhaust gas, comprising a water washing tower (100) and a treatment box (200), wherein, The inside of the treatment box (200) is sequentially provided with a heat exchange cavity (201) and a wastewater treatment cavity (206) from top to bottom, characterized in that the inside of the heat exchange cavity (201) is provided with heat exchange mechanisms (300) at equal intervals along the front-rear direction, and an aeration mechanism (400) is arranged in the inside of the wastewater treatment cavity (206); wherein the heat exchange mechanism (300) comprises: S-shaped gas heat exchange pipes (305) are distributed at equal intervals along the front-rear direction of the heat exchange cavity (201), and the top ends of the S-shaped gas heat exchange pipes (305) are extended to the top end of the treatment box (200) and connected with a waste gas inlet main pipe (301); S-shaped liquid inlet pipes (306) are sleeved on the outside of the S-shaped gas heat exchange pipes (305), and the top ends of the S-shaped liquid inlet pipes (306) are extended to the top end of the treatment box (200) and connected with a wastewater inlet main pipe (302), the bottom ends of the S-shaped liquid inlet pipes (306) are connected with a wastewater collecting pipe (204) outside the treatment box (200), and the other end of the wastewater collecting pipe (204) is connected with the top end of the S-shaped liquid inlet pipe (306); An exhaust pipe (304) is connected with the bottom end of the S-shaped gas heat exchange pipe (305) at one end, and the top end of the exhaust pipe (304) is extended to the top end of the treatment box (200) and connected with a gas collecting pipe (101), and the other end of the gas collecting pipe (101) is extended to the inside of a water washing tower (100); A disturbance assembly is distributed at equal intervals along the length direction of the S-shaped gas heat exchange pipe (305) and used for agitating the gas in the S-shaped gas heat exchange pipe (305) and the liquid in the S-shaped liquid inlet pipe (306); The aeration mechanism (400) comprises: A flow channel plate (408) is distributed at equal intervals along the height direction of the inside of the wastewater treatment cavity (206) and forms flow channels in the inside of the wastewater treatment cavity (206); A fixed plate (403) is fixed at equal intervals along the front-rear direction of the flow channel plate (408) and divides the flow channels in the inside of the wastewater treatment cavity (206) into a plurality of S-shaped flow channels (407); An aeration pipe placing groove (406) is arranged between two adjacent fixed plates (403); An aeration pipe (402) is installed in the inside of the aeration pipe placing groove (406), and aeration ports (405) are arranged at equal intervals on the aeration pipe (402) along the axial direction and extended to the inside of the S-shaped flow channel (407), and one end of the aeration pipe (402) is extended to the outside of the wastewater treatment cavity (206) and connected with an air inlet box (401).

2. The waterproofing membrane production wastewater and exhaust gas environmental protection treatment device according to claim 1, characterized in that, The bottom end of the S-shaped gas heat exchange pipe (305) is further connected with a liquid guide pipe (203), and the other end of the liquid guide pipe (203) is connected with the wastewater collecting pipe (204).

3. The waterproofing membrane production wastewater and exhaust gas environmental protection treatment device according to claim 1, characterized in that, The top of the wastewater collecting pipe (204) is connected with a flocculant inlet pipe (202) for adding flocculant.

4. The waterproofing material production wastewater and exhaust gas environmental protection treatment device according to claim 1, characterized in that, The arc-shaped structure of the S-shaped liquid inlet pipe (306) is connected with a gas guide pipe (303), and the other end of the gas guide pipe (303) is connected with the gas collecting pipe (101).

5. The waterproofing membrane production wastewater and off-gas environmentally friendly treatment device of claim 1, wherein, The disturbance assembly comprises a rotating ring (307) rotatably connected inside the S-shaped gas heat exchange pipe (305), and a plurality of inner vanes (308) are fixed at equal intervals in the circumferential direction on the inner side of the rotating ring (307), a plurality of outer vanes (309) are fixed at equal intervals in the circumferential direction on the outer side of the rotating ring (307), and the outer vanes (309) are located inside the S-shaped liquid inlet pipe (306).

6. The waterproofing membrane production wastewater and off-gas environmentally friendly treatment device of claim 1, wherein A plurality of baffle plate groups (404) are fixed at equal intervals in the flow direction of the wastewater inside the S-shaped flow channel (407), and the baffle plate groups (404) are formed by a combination of baffle plates fixed at an inclined distribution on both sides of the S-shaped flow channel (407); wherein the baffle plate is formed by a combination of an inclined portion fixed on both sides of the S-shaped flow channel (407) and a vertical portion parallel to the fixed plate (403).

7. The waterproofing membrane production wastewater and exhaust gas environmental protection treatment device according to claim 1, characterized in that, The bottom of one side of the wastewater treatment cavity (206) is connected with a discharge pipe (205).

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