Falling film evaporator for treating synthetic leather wastewater

Abstract

The utility model discloses a falling film evaporator for treating synthetic leather wastewater, which comprises an evaporation tank body, and a liquid inlet pipe is fixedly connected with one side of the top of the evaporation tank body in a penetrating manner; a heat exchange tube mechanism is arranged in an inner cavity of the evaporation tank body and comprises a material guide plate, a heat exchange tube and a heat exchange tube, and the material guide plate is mounted at the top of the inner cavity of the evaporation tank body; the plurality of heating assemblies are circularly and uniformly distributed at the top of the material guide plate; the distance between the top of the discharging assembly and the tops of the multiple heating assemblies ranges from 1 mm to 2 mm. And the dispersing assembly is used for uniformly distributing the waste liquid on the discharging assembly. Through the arrangement mode that the material guide plate, the heating assembly and the discharging assembly are matched, liquid entering the top of the evaporation tank body from the liquid inlet pipe can be dispersed through the dispersing assembly, the liquid can only uniformly flow downwards along the inner wall of the heating pipe in a film shape, and the liquid can be stably vaporized through the heating pipe; and the evaporation efficiency of the liquid is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of falling film evaporators, in particular to a falling film evaporator for treating synthetic leather wastewater. Background Art

[0002] With the expansion of enterprise scale and the enhancement of human awareness of environmental protection, coupled with the requirements for synthetic leather production costs and the continuous development of DMF recovery technology, it is necessary to recover DMF from DMF wastewater for reuse. Synthetic leather wastewater is generally evaporated by falling film evaporator.

[0003] Application No. 202320328475.8 discloses a falling film evaporator, including a tank body, a plug-in fitting tube and a material guide plate. A sealing cover is provided on the top of the tank body, and a liquid inlet pipe is provided on the sealing cover. The sides of the tank body are respectively provided with an input pipe for inputting a heating medium, an output pipe for outputting a heating medium and an exhaust pipe for outputting liquid vapor. A discharge pipe is provided at the bottom of the tank body, and a horizontally extending partition is provided inside the tank body; the plug-in fitting tube is arranged through the partition in the up-down direction and extends upward to the top of the partition, and the upper mouth of the plug-in fitting tube gradually converges from top to bottom; the material guide plate is slidably connected to the tank body in the up-down direction and is located above the partition. A heat exchange tube extending downward and used to transport and evaporate the liquid is penetrated through the material guide plate, and the lower end of the heat exchange tube is plugged into the plug-in fitting tube. The above-mentioned falling film evaporator can disassemble the heat exchange tubes for thorough cleaning, but the existing feed liquid needs to be evenly distributed in each heat exchange tube. However, the existing heat exchange tubes are flush with the bottom of the liquid inlet cavity at the top of the evaporator, making it difficult to ensure that the liquid flows evenly downward in a film-like manner along the inner wall of the tube. Excessive liquid entering the inner cavity of the heat exchange tubes may easily lead to an increase in concentrated liquid, affecting the evaporation and vaporization efficiency of the liquid. Utility Model Content

[0004] The purpose of the utility model is to provide a falling film evaporator for treating synthetic leather wastewater, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a falling film evaporator for treating synthetic leather wastewater, comprising: an evaporation tank body, a liquid inlet pipe fixedly inserted and connected to one side of the top of the evaporation tank body;

[0006] The inner cavity of the evaporation tank is provided with a heat exchange tube mechanism, and the heat exchange tube mechanism includes:

[0007] A material guide plate, the material guide plate being installed on the top of the inner cavity of the evaporation tank;

[0008] A plurality of heating components are evenly distributed on the top of the guide plate in a circular shape;

[0009] A blanking assembly is provided above the plurality of heating assemblies, and a distance between the blanking assembly and the tops of the plurality of heating assemblies is 1 mm to 2 mm;

[0010] A dispersion component is arranged at one end of the top of the blanking component, and is used for uniformly distributing waste liquid on the blanking component.

[0011] Preferably, the heating component comprises:

[0012] Heating tubes, wherein a plurality of heating tubes are fixedly inserted into the top of the guide plate in an annular array, and the heating tubes and the upper surface of the guide plate are protruding;

[0013] The chamfered edge is opened on the top of the heating tube, and the side section of the chamfered edge is distributed in an arc shape.

[0014] Preferably, the blanking assembly comprises:

[0015] A blanking plate, the blanking plate being fixed to the inner wall of the evaporation tank body;

[0016] An inclined surface, the inclined surface being provided on the upper surface of the blanking plate;

[0017] A feeding hole is provided at one end of the inclined surface.

[0018] Preferably, the distance between the lower surface of the blanking plate and the tops of the multiple heating tubes is 1 mm-2 mm, and the dispersion component is arranged on the upper surface of the slope.

[0019] Preferably, the dispersed assembly comprises:

[0020] A fixing frame fixed to the top inner wall of the evaporation tank;

[0021] A dispersion plate, the dispersion plate being rotated with one end of the fixing frame via a pin;

[0022] A plurality of guide grooves are equidistantly arranged at the bottom of the dispersion plate.

[0023] Preferably, a separation mechanism is provided on one side of the bottom of the evaporation tank body, and the separation mechanism includes:

[0024] A connecting pipe fixed to one side of the bottom of the evaporation tank;

[0025] a separator fixed to one end of the connecting pipe;

[0026] A steam outlet pipe is fixed to one side of the top of the separator.

[0027] Preferably, a heating steam inlet pipe is fixedly inserted and connected to the middle of the other side of the evaporation tank body, and a condensed water outlet pipe is fixedly inserted and connected to the bottom of the other side of the evaporation tank body.

[0028] Technical effects and advantages of this utility model:

[0029] The utility model adopts the arrangement mode of matching the guide plate, the heating component and the discharge component, and utilizes the dispersion component, so that the liquid entering the top of the evaporation tank through the liquid inlet pipe can be dispersed, and the liquid can enter the top of the heating component along the discharge component, so that the liquid can only flow downward in a film shape along the inner wall of the heating tube, so that the liquid can be stably vaporized through the heating tube, thereby reducing the evaporation efficiency of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0031] Figure 2 This is a front cross-sectional structural diagram of the evaporation tank body of the present invention.

[0032] Figure 3 For this utility model Figure 2 Schematic diagram of the locally enlarged structure at point A in the middle.

[0033] In the figure: 1. Evaporator body; 2. Liquid inlet pipe; 3. Heat exchange tube mechanism; 31. Guide plate; 32. Heating assembly; 321. Heating tube; 322. Chamfered edge; 33. Feeding assembly; 331. Feeding plate; 332. Inclined surface; 333. Feeding hole; 34. Dispersing assembly; 341. Fixing bracket; 342. Dispersing plate; 343. Guide groove; 4. Separating mechanism; 41. Connecting pipe; 42. Separator; 43. Steam outlet pipe; 5. Heating steam inlet pipe; 6. Condensate outlet pipe. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] The utility model provides Figure 1-3 The falling film evaporator for treating synthetic leather wastewater shown in the figure comprises: an evaporation tank body 1, a liquid inlet pipe 2 fixedly inserted and connected to one side of the top of the evaporation tank body 1, so that the wastewater can stably enter the top of the evaporation tank body 1;

[0036] Furthermore, the inner cavity of the evaporation tank body 1 is provided with a heat exchange tube mechanism 3, which includes: a guide plate 31, multiple heating components 32, a discharge component 33 and a dispersion component 34. The guide plate 31 is installed at the top of the inner cavity of the evaporation tank body 1. The guide plate 31 is used to separate the liquid entering the top of the evaporation tank body 1 from the middle of the evaporation tank body 1. The multiple heating components 32 are evenly distributed in a circular shape on the top of the guide plate 31. The heating components 32 are used to heat and vaporize the liquid. The discharge component 33 is arranged above the multiple heating components 32, and the top spacing between the discharge component 33 and the multiple heating components 32 is 1mm-2mm. The dispersion component 34 is arranged at one end of the top of the discharge component 33. The dispersion component 34 is used to evenly distribute the waste liquid on the discharge component 33.

[0037] Specifically, the heating assembly 32 includes: a heating tube 321 and a chamfered edge 322. Multiple heating tubes 321 are fixedly inserted into the top of the guide plate 31 in a circular array. The heating tubes 321 are protruded from the upper surface of the guide plate 31, and the distance between the heating tubes 321 and the guide plate 31 is 5mm-20mm. The chamfered edge 322 is provided at the top of the heating tube 321. The side cross-section of the chamfered edge 322 is arc-shaped. The chamfered edge 322 facilitates the wastewater flow to flow stably and evenly downward along the inner wall of the heating tube 321 in a film-like manner, facilitating the heating and vaporization of the liquid on the inner wall of the heating tube 321.

[0038] Specifically, the blanking assembly 33 includes: a blanking plate 331, a slope 332 and a blanking hole 333. The blanking plate 331 is fixed to the inner wall of the evaporation tank body 1. The distance between the lower surface of the blanking plate 331 and the top of the multiple heating tubes 321 is 1mm-2mm. The blanking plate 331 is used to separate the liquid on the upper surface of the blanking plate 331 and to isolate a large amount of liquid from the multiple heating tubes 321, preventing the liquid from directly flowing into the inner cavity of the multiple heating tubes 321, so that the liquid can be evenly distributed on the guide plate. 31, and the liquid can only enter the inner cavity of the heating tube 321 along the gap between the chamfered edge 322 and the blanking plate 331, so that the liquid flows into the inner cavity of the heating tube 321 evenly in the form of a thin film along the chamfered edge 322 of the heating tube 321. The inclined surface 332 is provided on the upper surface of the blanking plate 331, and the inclined surface 332 facilitates the liquid to stably flow into the inner cavity of the lower material hole 333. The blanking hole 333 is provided at one end of the inclined surface 332, and the liquid can flow evenly between the guide plate 31 and the blanking plate 331 through the lower material hole 333.

[0039] Specifically, the dispersion assembly 34 is disposed on the upper surface of the inclined surface 332 and includes: a fixing frame 341, a dispersion plate 342, and a plurality of guide grooves 343. The fixing frame 341 is fixed to the top inner wall of the evaporation tank body 1. The dispersion plate 342 is rotated with one end of the fixing frame 341 via a pin. The bottom of the dispersion plate 342 has a rounded chamfer structure. The plurality of guide grooves 343 are equidistantly provided at the bottom of the dispersion plate 342. This facilitates the dispersion plate 342 to evenly disperse the liquid flowing on the upper surface of the inclined surface 332. The dispersed liquid can flow into the inner cavity of the lower feed hole 333 through the guide grooves 343, thereby facilitating the stable dispersion flow of the waste liquid.

[0040] Furthermore, a separation mechanism 4 is provided on one side of the bottom of the evaporation tank body 1. The separation mechanism 4 includes: a connecting pipe 41, a separator 42, and a steam outlet pipe 43. The connecting pipe 41 is fixed to one side of the bottom of the evaporation tank body 1. The separator 42 is fixed to one end of the connecting pipe 41. The separator 42 facilitates the separation of the heating steam and the concentrated liquid. The steam outlet pipe 43 is fixed to one side of the top of the separator 42 to facilitate the stable discharge of the heating steam.

[0041] Furthermore, a heating steam inlet pipe 5 is fixedly inserted and connected to the middle of the other side of the evaporation tank body 1, so that the heating steam inlet pipe 5 can enter the middle of the evaporation tank body 1 to heat the outer walls of the multiple heating tubes 321. A condensed water outlet pipe 6 is fixedly inserted and connected to the bottom of the other side of the evaporation tank body 1, so that the condensed water heated on the outer walls of the heating tubes 321 can be stably discharged through the condensed water outlet pipe 6, thereby improving the stability of the falling film evaporator.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A falling film evaporator for treating synthetic leather wastewater, comprising: An evaporation tank body (1), wherein a liquid inlet pipe (2) is fixedly inserted and connected to one side of the top of the evaporation tank body (1); The invention is characterized in that the inner cavity of the evaporation tank body (1) is provided with a heat exchange tube mechanism (3), and the heat exchange tube mechanism (3) comprises: A material guide plate (31), the material guide plate (31) being installed on the top of the inner cavity of the evaporation tank body (1); A plurality of heating components (32), wherein the plurality of heating components (32) are evenly distributed in a circular shape on the top of the guide plate (31); A blanking component (33), wherein the blanking component (33) is arranged above the plurality of heating components (32), and a top spacing between the blanking component (33) and the plurality of heating components (32) is 1 mm to 2 mm; A dispersion component (34) is provided at one end of the top of the blanking component (33), and the dispersion component (34) is used for uniformly distributing the waste liquid on the blanking component (33).

2. The falling film evaporator for treating synthetic leather wastewater according to claim 1, characterized in that: The heating assembly (32) comprises: Heating tubes (321), a plurality of heating tubes (321) are fixedly inserted into the top of the guide plate (31) in an annular array, and the heating tubes (321) and the upper surface of the guide plate (31) are protruded; A chamfered edge (322), wherein the chamfered edge (322) is provided at the top of the heating tube (321), and the side section of the chamfered edge (322) is distributed in an arc shape.

3. The falling film evaporator for treating synthetic leather wastewater according to claim 2, characterized in that: The blanking assembly (33) comprises: A blanking plate (331), wherein the blanking plate (331) is fixed to the inner wall of the evaporation tank body (1); An inclined surface (332), the inclined surface (332) being provided on the upper surface of the blanking plate (331); A material discharge hole (333) is provided at one end of the inclined surface (332).

4. The falling film evaporator for treating synthetic leather wastewater according to claim 3, characterized in that: The distance between the lower surface of the blanking plate (331) and the tops of the plurality of heating tubes (321) is 1 mm to 2 mm, and the dispersion component (34) is arranged on the upper surface of the inclined surface (332).

5. The falling film evaporator for treating synthetic leather wastewater according to claim 4, characterized in that: The dispersion assembly (34) comprises: A fixing frame (341), wherein the fixing frame (341) is fixed to the top inner wall of the evaporation tank body (1); a dispersion plate (342), wherein the dispersion plate (342) is rotated with one end of the fixing frame (341) via a pin; A plurality of guide grooves (343) are provided at equal intervals on the bottom of the dispersion plate (342).

6. The falling film evaporator for treating synthetic leather wastewater according to claim 2, characterized in that: A separation mechanism (4) is provided on one side of the bottom of the evaporation tank body (1), and the separation mechanism (4) comprises: A connecting pipe (41), wherein the connecting pipe (41) is fixed to one side of the bottom of the evaporation tank body (1); a separator (42), wherein the separator (42) is fixed to one end of the connecting pipe (41); A steam outlet pipe (43) is fixed to one side of the top of the separator (42).

7. The falling film evaporator for treating synthetic leather wastewater according to claim 2, characterized in that: A heating steam inlet pipe (5) is fixedly inserted and connected to the middle of the other side of the evaporation tank body (1), and a condensed water outlet pipe (6) is fixedly inserted and connected to the bottom of the other side of the evaporation tank body (1).

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