A waste heat recovery device for wastewater in PU synthetic leather production

Abstract

The utility model belongs to the technical field of industrial wastewater treatment, and is particularly a wastewater waste heat recovery device for PU synthetic leather production, including a water tank, a waste heat recovery component and a filter frame. An insulation layer is arranged between the inner box body and the outer box body of the water tank. The waste heat recovery component is arranged in the internal cavity of the water tank. The heat exchange tube of the waste heat recovery component is arranged on a support frame. Evenly distributed grooves are provided on the outer wall of the heat exchange tube. The two ends of the heat exchange tube are respectively fixedly connected with a liquid inlet pipe and a liquid outlet pipe through a pipe adapter. The utility model installs a filter frame that can be quickly disassembled and assembled at the water inlet of the water tank, and uses the filter frame to filter and process the wastewater entering the water tank, thereby reducing the sediment inside the water tank, extending the cleaning cycle of the water tank, reducing the number of cleaning times, improving the efficiency of waste heat recovery of wastewater, facilitating the rapid cleaning of the water tank, and reducing the impurities in the wastewater, ensuring that the heat exchange tube can be effectively in contact with the wastewater, and effectively recovering the waste heat of the wastewater.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial wastewater treatment, in particular to a wastewater waste heat recycling device for PU synthetic leather production. Background Art

[0002] Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute material. It is usually made of impregnated non-woven fabric as the mesh layer and microporous polyurethane layer as the grain layer. Both its front and back sides are very similar to leather and have a certain degree of air permeability. It is closer to natural leather than ordinary artificial leather. It is widely used in the production of shoes, boots, bags and balls, etc.

[0003] In the production process of synthetic leather, washing is an essential process step. A large amount of wastewater will be generated during the washing process. The wastewater contains a large amount of heat energy. In order to promote energy conservation and emission reduction and energy utilization efficiency, it is necessary to recover the heat in the wastewater. At present, in the wastewater recovery process, the wastewater is transported to the water tank for heat exchange with the heat exchange medium to achieve the recovery of waste heat. The impurities in the wastewater will settle in the water tank during this process and need to be cleaned regularly, which affects the recovery of waste heat. At the same time, more impurities in the wastewater will also affect the efficiency of heat exchange. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the shortcomings of the prior art, the utility model provides a wastewater waste heat recovery device for PU synthetic leather production, which solves the problem that impurities in the wastewater will settle in the water tank, requiring regular cleaning, affecting the recovery of waste heat, and at the same time, a large amount of impurities in the wastewater will also affect the efficiency of heat exchange.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0008] A waste heat recovery device for wastewater used in PU synthetic leather production comprises a water tank, a waste heat recovery component and a filter frame, wherein an insulation layer is arranged between an inner box body and an outer box body of the water tank, the waste heat recovery component is arranged in an internal cavity of the water tank, and a heat exchange tube of the waste heat recovery component is arranged on a support frame, and evenly distributed grooves are arranged on an outer wall of the heat exchange tube, and both ends of the heat exchange tube are respectively fixedly connected with a liquid inlet pipe and a liquid outlet pipe through a pipe adapter, and a filter frame is arranged in an internal cavity located on one side of the water inlet pipe of the water tank.

[0009] Furthermore, the heat exchange tubes are bent in an "S" shape and stacked layer by layer to be evenly distributed in the internal cavity of the water tank. The same end of all the heat exchange tubes is connected to the same pipe adapter, and the liquid inlet pipe and the liquid outlet pipe are connected to the heat exchange tubes through the pipe adapter. Each layer of the heat exchange tubes is placed on a support frame at a corresponding position, and the lower end of the support frame is supported on the bottom inner wall of the inner box body.

[0010] Furthermore, a hook integrally arranged on the upper part of the filter frame is hung on the side wall at the port portion of the water tank, the filter frame is provided with evenly distributed filter holes, a liquid inlet groove is provided on the side wall of the filter frame at the position of the water inlet pipe, and the liquid inlet groove mask is provided at the port portion of the water inlet pipe located on the inner wall of the water tank.

[0011] Furthermore, a supporting foot is fixedly connected to the bottom of the outer box body of the water tank, and an inlet pipe and an outlet pipe are installed on the water tank. The lower end of the overflow pipe installed on the side wall of the water tank is connected to the discharge pipe, the discharge pipe is installed at the bottom of the water tank, and valves are installed on the inlet pipe, the outlet pipe and the discharge pipe.

[0012] (III) Beneficial effects

[0013] Compared with the prior art, the utility model provides a waste heat recovery device for wastewater in the production of PU synthetic leather, which has the following beneficial effects:

[0014] The utility model installs a filter frame which can be quickly disassembled and assembled at the water inlet of the water tank, and utilizes the filter frame to filter the waste water entering the water tank, thereby reducing the sediment inside the water tank, extending the cleaning cycle of the water tank, reducing the number of cleaning times, improving the efficiency of waste heat recovery from the waste water, and facilitating rapid cleaning of the water tank, while reducing impurities in the waste water, ensuring that the heat exchange tube can make effective contact with the waste water, and effectively recovering the waste heat of the waste water. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the water tank in the utility model;

[0017] Figure 3 It is a structural schematic diagram of the waste heat recovery component in the utility model;

[0018] Figure 4 It is a schematic diagram of the cross-sectional structure of the heat exchange tube in the utility model;

[0019] Figure 5 It is a structural schematic diagram of the filter frame in the utility model.

[0020] In the figure: 1. water tank; 101. inner box body; 102. outer box body; 103. water inlet pipe; 104. water outlet pipe; 105. overflow pipe; 106. support foot; 107. discharge pipe; 108. insulation layer; 2. waste heat recovery component; 201. heat exchange tube; 2011. groove; 202. support frame; 203. pipe adapter; 204. liquid inlet pipe; 205. liquid outlet pipe; 3. filter frame; 301. hook; 302. liquid inlet slot. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, an embodiment of the utility model proposes: a waste heat recovery device for waste water used in PU synthetic leather production, comprising a water tank 1, a waste heat recovery component 2 and a filter frame 3, an insulation layer 108 is arranged between the inner box body 101 and the outer box body 102 of the water tank 1, and the insulation layer 108 is used to improve the insulation performance of the water tank 1, reduce the loss of waste heat in the waste water, and increase the recovery amount of waste heat in the waste water, the waste heat recovery component 2 is arranged in the internal cavity of the water tank 1, and the heat exchange tube 201 of the waste heat recovery component 2 is arranged on the support frame 202, the heat exchange tube 201 is stably arranged in the water tank 1, and the waste heat of the waste water in the water tank 1 is recovered, and the outer wall of the heat exchange tube 201 is provided with evenly distributed grooves 2011, and the heat exchange tube 201 is used to recover the waste heat of the waste water in the water tank 1. The groove 2011 increases the contact surface between the heat exchange tube 201 and the wastewater, and improves the efficiency of the heat exchange tube 201 in recovering the waste heat from the wastewater. The two ends of the heat exchange tube 201 are respectively fixedly connected with the liquid inlet pipe 204 and the liquid outlet pipe 205 through the pipe adapter 203, so that the heat exchange medium is smoothly input into the heat exchange tube 201 to absorb heat, and then discharged smoothly. In addition, a filter frame 3 is arranged in the internal cavity on the side of the water inlet pipe 103 of the water tank 1. The filter frame 3 is used to filter the wastewater entering the water tank 1, so as to reduce the sediment inside the water tank 1, extend the cleaning cycle of the water tank 1, reduce the number of cleaning times, improve the efficiency of waste heat recovery from the wastewater, and also facilitate the rapid cleaning of the water tank 1.

[0024] like Figure 1 , Figure 3 and Figure 4As shown, in some embodiments, the heat exchange tube 201 is bent in an "S" shape and is stacked layer by layer and evenly distributed in the internal cavity of the water tank 1, so as to absorb the waste heat of the waste water in various parts of the internal cavity and improve the efficiency of waste heat recovery. The same end of all the heat exchange tubes 201 is connected to the same pipe adapter 203, and the liquid inlet pipe 204 and the liquid outlet pipe 205 are connected to the heat exchange tube 201 through the pipe adapter 203, so as to smoothly transport the heat exchange medium from the liquid inlet pipe 204 to the heat exchange medium. In the tube 201, heat is absorbed and discharged smoothly from the liquid outlet pipe 205. The heat exchange medium can be water or other heat exchange media commonly found in the market. Each layer of the heat exchange tube 201 is placed on the support frame 202 at the corresponding position. The lower end of the support frame 202 is supported on the bottom inner wall of the inner box body 101. The support frame 202 is used to stably support and fix the heat exchange tube 201 in the inner wall cavity of the water tank 1, ensuring that the heat exchange tube 201 can effectively contact the wastewater and effectively recycle the waste heat of the wastewater.

[0025] like Figure 1 and Figure 5 As shown, in some embodiments, a hook 301 integrally arranged on the upper part of the filter frame 3 is hung on the side wall at the port portion of the water tank 1, so as to stably install the entire filter frame 3 into the internal cavity of the water tank 1, filter the wastewater entering the water tank 1, remove the solid impurities in the wastewater, and prevent the solid impurities in the wastewater from settling in the water tank 1, so as to ensure that the water tank 1 can treat the wastewater for a long time. The filter frame 3 is provided with evenly distributed filter holes to achieve the filtering treatment of the wastewater. The filter frame 3 is provided with a filter hole at the position corresponding to the water inlet pipe 103 on the side wall. There is a liquid inlet slot 302, and the liquid inlet slot 302 cover is arranged at the end portion of the water inlet pipe 103 located on the inner wall of the water tank 1, and a sealing gasket is arranged between the outer wall of the filter frame 3 at the liquid inlet slot 302 and the inner wall at the end portion of the water inlet pipe 103 on the water tank 1, to ensure that all the waste water transported by the water inlet pipe 103 to the water tank 1 is injected into the filter frame 3, and the waste water is effectively filtered and treated, and then after using it for a period of time, the filter frame 3 is removed, the debris inside it is cleaned up and it can continue to be used, thereby reducing the number of times the water tank 1 is cleaned and improving the efficiency of waste heat recovery from waste water.

[0026] like Figure 1 and Figure 2As shown, in some embodiments, the bottom of the outer box body 102 of the water tank 1 is fixedly connected with a support foot 106, which is convenient for stably supporting the entire water tank 1 in the use position, ensuring that the water tank 1 recovers the waste heat of the waste water generated in the production process of PU synthetic leather, and the water tank 1 is provided with an inlet pipe 103 and an outlet pipe 104, which is convenient for inputting waste water into the water tank 1 for waste heat recovery, and the waste water is smoothly discharged from the water tank 1 after the heat recovery is completed, and the lower end of the overflow pipe 105 arranged on the side wall of the water tank 1 is connected to the discharge pipe 107, and the discharge pipe 107 is arranged at the bottom of the water tank 1. The drain pipe 107 is convenient for draining away excess waste water from the overflow pipe 105 when the liquid level in the water tank 1 is higher than the set maximum value, so as to avoid excessive waste water in the water tank 1 overflowing from the tank mouth. At the same time, the drain pipe 107 is convenient for draining away a small amount of waste water and sediment accumulated in the water tank 1 when cleaning the water tank 1, so as to clean the water tank 1 smoothly. In addition, valves are arranged on the water inlet pipe 103, the water outlet pipe 104 and the drain pipe 107, so as to control the on-off of the pipeline and realize the smooth transportation of waste water, so as to recover the waste heat in the waste water.

[0027] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A waste heat recovery device for wastewater in the production of PU synthetic leather, comprising a water tank (1), a waste heat recovery unit (2) and a filter frame (3), characterized in that: A heat-insulating layer (108) is arranged between the inner box body (101) and the outer box body (102) of the water tank (1); the waste heat recovery component (2) is arranged in the internal cavity of the water tank (1); and the heat exchange tube (201) of the waste heat recovery component (2) is arranged on a support frame (202); evenly distributed grooves (2011) are provided on the outer wall of the heat exchange tube (201); the two ends of the heat exchange tube (201) are respectively fixedly connected to a liquid inlet pipe (204) and a liquid outlet pipe (205) through a pipe adapter (203); and a filter frame (3) is arranged in the internal cavity on one side of the water inlet pipe (103) on the water tank (1).

2. A waste heat recovery device for wastewater from PU synthetic leather production according to claim 1, characterized in that: The heat exchange tubes (201) are bent in an "S" shape and are stacked layer by layer and evenly distributed in the internal cavity of the water tank (1); the same end of all the heat exchange tubes (201) are connected to the same pipe adapter (203); and the liquid inlet pipe (204) and the liquid outlet pipe (205) are connected to the heat exchange tubes (201) via the pipe adapter (203).

3. A waste heat recovery device for wastewater from PU synthetic leather production according to claim 2, characterized in that: Each layer of the heat exchange tubes (201) is placed on a support frame (202) at a corresponding position, and the lower end of the support frame (202) is supported on the bottom inner wall of the inner box (101).

4. The device for recycling waste heat from wastewater in the production of PU synthetic leather according to claim 1, characterized in that: The hook (301) integrally arranged on the upper part of the filter frame (3) is hung on the side wall at the port portion of the water tank (1); the filter frame (3) is provided with evenly distributed filter holes; a liquid inlet slot (302) is provided on the side wall of the filter frame (3) at a position corresponding to the water inlet pipe (103); the liquid inlet slot (302) is covered at the port portion of the water inlet pipe (103) located on the inner wall of the water tank (1).

5. The device for recycling waste heat from wastewater in the production of PU synthetic leather according to claim 1, characterized in that: The bottom of the outer box body (102) of the water tank (1) is fixedly connected to a supporting foot (106), and a water inlet pipe (103) and a water outlet pipe (104) are arranged on the water tank (1); the lower end of an overflow pipe (105) arranged on the side wall of the water tank (1) is connected to a discharge pipe (107), and the discharge pipe (107) is arranged at the bottom of the water tank (1); and valves are arranged on the water inlet pipe (103), the water outlet pipe (104) and the discharge pipe (107).

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