Falling film evaporation equipment for coal chemical wastewater

Abstract

The utility model discloses falling film evaporation equipment for coal chemical wastewater. The coal chemical industry wastewater falling film evaporation equipment comprises a falling film evaporator, a material transfer circulating pump, a material transfer pipeline, a conductivity detection component and a flow detection component, and the two ends of the material transfer pipeline are connected to a discharging port and a feeding port of the falling film evaporator respectively. The conductivity detection part and the flow detection part are respectively arranged on the material transfer pipeline and are used for detecting the conductivity and the flow of materials in the material transfer pipeline, and the material transfer circulating pump is arranged on the material transfer pipeline and is used for transferring the materials to the falling film evaporator. According to the coal chemical industry wastewater falling film evaporation equipment, related online instrument facilities such as the conductivity detection component and the flow detection component are additionally arranged, so that data such as wastewater conductivity and circulating flow can be monitored on line, and the falling film transfer amount and the circulating amount of the falling film evaporator can be adjusted in time according to the monitoring condition; and long-term efficient and stable operation of the falling-film evaporator is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a falling film evaporation device for coal chemical wastewater. Background Art

[0002] To achieve zero-discharge treatment of coal chemical wastewater, most coal chemical enterprises choose the evaporation crystallization process as the zero-discharge treatment process. Commonly used evaporation crystallization equipment includes forced circulation evaporators and falling film evaporators, etc. Due to its advantages such as high heat transfer efficiency, small floor area, and low investment cost, the falling film evaporator is often used in the evaporation crystallization section of coal chemical concentrated brine for concentrated brine concentration. Since the quality of coal chemical wastewater is complex and often contains impurities such as Ca 2+ , Mg 2+ , silicon, organic matter, etc., it is easy to cause fouling and blockage of the heat exchange tubes of the falling film evaporator. After the scale flakes fall off, they are transported to the falling film water distribution tray by the falling film circulation, fouling the water distribution holes, making the water distribution of the water distribution tray uneven, resulting in dry burning of some heat exchange tubes of the falling film evaporator, and fouling and blockage of the heat exchange tubes with salt, causing a sharp drop in the evaporation capacity of the falling film evaporator. In addition, conventional falling film evaporators cannot monitor the concentration of wastewater in real time. In some factories, the falling film evaporator fails to transfer materials in time, and the salt crystallization in the falling film evaporator completely blocks the heat exchange tubes, resulting in equipment shutdown and seriously affecting the treatment efficiency. Summary of the Utility Model

[0003] Based on this, it is necessary to provide a falling film evaporation device for coal chemical wastewater. The falling film evaporation device for coal chemical wastewater of the utility model can on-line monitor the conductivity and circulation flow rate of wastewater, and timely adjust the falling film material transfer amount and circulation amount according to the monitoring situation, ensuring the long-term efficient and stable operation of the falling film evaporator and improving the sewage treatment efficiency.

[0004] An embodiment of the present application provides a falling film evaporation device for coal chemical wastewater.

[0005] A falling film evaporation device for coal chemical wastewater includes a falling film evaporator, a material transfer circulation pump, a material transfer pipeline, a conductivity detection component, and a flow rate detection component. The two ends of the material transfer pipeline are respectively connected to the discharge port and the feed port of the falling film evaporator. The conductivity detection component and the flow rate detection component are respectively arranged on the material transfer pipeline to detect the conductivity and flow rate of the material in the material transfer pipeline. The material transfer circulation pump is installed on the material transfer pipeline to transfer materials to the falling film evaporator.

[0006] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a cleaning water tank, a cleaning pump, and a cleaning pipeline. One end of the cleaning pipeline is connected to the cleaning inlet of the falling film evaporator, and the other end is connected to the transfer pipeline. The cleaning water tank is connected to the cleaning pipeline, and the cleaning pump is installed on the cleaning pipeline to drive the cleaning liquid in the cleaning pipeline into the falling film evaporator for cleaning.

[0007] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a cleaning inlet valve and a cleaning discharge valve. Both the cleaning inlet valve and the cleaning discharge valve are arranged on the cleaning pipeline. The installation position of the cleaning inlet valve is closer to the falling film evaporator, and the installation position of the cleaning discharge valve is closer to the transfer pipeline.

[0008] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes an emptying valve. The emptying valve is installed on the cleaning water tank to control the emptying of the cleaning liquid in the cleaning water tank.

[0009] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a feed valve. The feed valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the feed inlet of the falling film evaporator.

[0010] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a discharge valve. The discharge valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the discharge outlet of the falling film evaporator.

[0011] In some of these embodiments, both the conductivity detection component and the flow rate detection component are arranged on the transfer pipeline and are located at a position between the transfer circulation pump and the discharge outlet of the falling film evaporator.

[0012] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a check valve. The check valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the discharge outlet of the falling film evaporator.

[0013] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes a pressure gauge after the pump. The pressure gauge after the pump is connected to the transfer circulation pump;

[0014] And / or, a water supply pipeline for supplying water to the falling film evaporator is further connected to the transfer pipeline.

[0015] In some of these embodiments, the coal chemical industrial wastewater falling film evaporation device further includes an observation sight glass. The observation sight glass is installed on the falling film evaporator to inspect the falling film evaporator.

[0016] In some of these embodiments, the coal chemical wastewater falling film evaporation device further includes a vapor-liquid separator, a compressor, and a heating mechanism. The vapor-liquid separator is connected to the feed port of the falling film evaporator. The transfer pipeline is connected to the falling film evaporator through the vapor-liquid separator. The steam outlet of the vapor-liquid separator is communicated with the steam inlet of the falling film evaporator through a steam pipeline. The compressor and the heating mechanism are connected to the steam pipeline. The vapor-liquid separator is used to achieve the vapor-liquid separation of the material. The separated steam is compressed by the compressor and heated by the heating mechanism and then returns to the falling film evaporator for material evaporation.

[0017] In some of these embodiments, the coal chemical wastewater falling film evaporation device further includes a plurality of Y-type filters. The plurality of Y-type filters are connected in parallel on the transfer pipeline, and only one of the plurality of Y-type filters works.

[0018] In the above coal chemical wastewater falling film evaporation device, relevant on-line instrument facilities such as conductivity detection components and flow detection components are added, which can on-line monitor data such as wastewater conductivity and circulating flow rate, and timely adjust the falling film transfer amount and circulating amount of the falling film evaporator according to the monitoring situation to ensure the long-term efficient and stable operation of the falling film evaporator.

[0019] Furthermore, the above coal chemical wastewater falling film evaporation device is designed with a cleaning structure. When some pipelines of the falling film evaporator, such as heat exchange pipelines, are scaled, they can be cleaned in time, so as to quickly restore the evaporation capacity.

[0020] Furthermore, the above coal chemical wastewater falling film evaporation device also designs an observation sight glass at the sealing position of the water distribution tray on the top of the falling film evaporator. Operators can observe the water distribution situation of the water distribution tray in the falling film evaporator at any time according to the observation sight glass. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] In order to more completely understand the present application and its beneficial effects, the following will be described in conjunction with the drawings. Among them, the same reference numerals in the following description represent the same parts.

[0023] Figure 1 Schematic diagram of the coal chemical wastewater falling film evaporation device according to an embodiment of the present utility model.

[0024] Description of the Reference Numerals

[0025] 10. Coal chemical industry wastewater falling film evaporation equipment; 100. Falling film evaporator; 200. Transfer circulation pump; 300. Transfer pipeline; 400. Conductivity detection component; 500. Flow rate detection component; 600. Cleaning water tank; 700. Cleaning pump; 800. Cleaning pipeline; 900. Cleaning inlet valve; 1000. Cleaning discharge valve; 1100. Vent valve; 1200. Feed valve; 1300. Discharge valve; 1400. Check valve; 1500. Pressure gauge behind the pump; 1600. Observation sight glass; 1700. Water inlet pipe; 1800. Vapor-liquid separator. Detailed implementation mode

[0026] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the following will describe the detailed implementation mode of the present utility model in conjunction with the attached drawings. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0027] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the attached drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model.

[0028] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of the present utility model, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used to distinguish the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] The embodiment of the present application provides a coal chemical wastewater falling film evaporation device to solve at least one of the following problems: the water distribution holes of the falling film evaporator water distribution pan are blocked by dirt, the water distribution pan distributes water unevenly, and some heat exchange tubes of the falling film evaporator are dry-burned, the heat exchange tubes are blocked by salt, and the evaporation amount drops sharply. The coal chemical wastewater falling film evaporation device will be described below with reference to the accompanying drawings.

[0033] The coal chemical wastewater falling film evaporation device 10 provided in the embodiment of the present application is exemplary, please refer to Figure 1 As shown, Figure 1 A schematic diagram of the structure of a coal chemical wastewater falling film evaporation device 10 provided in an embodiment of the present application. The coal chemical wastewater falling film evaporation device 10 of the present application can be used for coal chemical wastewater falling film evaporation. In order to more clearly illustrate the structure of the coal chemical wastewater falling film evaporation device 10, the coal chemical wastewater falling film evaporation device 10 will be introduced in conjunction with the accompanying drawings.

[0034] For example, see Figure 1As shown, a falling film evaporation device 10 for coal chemical industry wastewater includes a falling film evaporator 100, a transfer circulation pump 200, a transfer pipeline 300, a conductivity detection component 400, and a flow rate detection component 500. Both ends of the transfer pipeline 300 are respectively connected to the discharge port and the feed port of the falling film evaporator 100. The conductivity detection component 400 and the flow rate detection component 500 are respectively arranged on the transfer pipeline 300 to detect the conductivity and flow rate of the material in the transfer pipeline 300. The transfer circulation pump 200 is installed on the transfer pipeline 300 to transfer materials for the falling film evaporator 100.

[0035] In some embodiments, please refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a cleaning water tank 600, a cleaning pump 700, and a cleaning pipeline 800. One end of the cleaning pipeline 800 is connected to the cleaning inlet of the falling film evaporator 100 and the other end is connected to the transfer pipeline 300. The cleaning water tank 600 is connected to the cleaning pipeline 800. The cleaning pump 700 is installed on the cleaning pipeline 800 to drive the cleaning liquid in the cleaning pipeline 800 into the falling film evaporator 100 for cleaning. The above-mentioned falling film evaporation device 10 for coal chemical industry wastewater is designed with a cleaning structure. When some pipelines of the falling film evaporator 100, such as heat exchange pipelines, are scaled, they can be cleaned in time, so as to quickly restore the evaporation capacity.

[0036] In some embodiments, please refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a cleaning inlet valve 900 and a cleaning discharge valve 1000. Both the cleaning inlet valve 900 and the cleaning discharge valve 1000 are arranged on the cleaning pipeline 800. The installation position of the cleaning inlet valve 900 is close to the falling film evaporator 100, and the installation position of the cleaning discharge valve 1000 is close to the transfer pipeline 300.

[0037] In some embodiments, the flow rate detection component 500 can be an electromagnetic flowmeter.

[0038] In some embodiments, the conductivity detection component 400 can be a conductivity meter.

[0039] In some embodiments, please refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes an emptying valve 1100. The emptying valve 1100 is installed on the cleaning water tank 600 to control the emptying of the cleaning liquid in the cleaning water tank 600.

[0040] In some embodiments, please refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a feed valve 1200. The feed valve 1200 is arranged on the transfer pipeline 300 and is located at a position between the transfer circulation pump 200 and the feed port of the falling film evaporator 100.

[0041] In some of these embodiments, refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a discharge valve 1300. The discharge valve 1300 is disposed on the transfer pipeline 300 and is located at a position between the transfer circulation pump 200 and the discharge port of the falling film evaporator 100. In this embodiment, the feed valve 1200 and the discharge valve 1300 are provided to control the transfer of the falling film evaporator 100.

[0042] In some of these embodiments, refer to Figure 1 As shown, the conductivity detection component 400 and the flow rate detection component 500 are both disposed on the transfer pipeline 300 and are located at a position between the transfer circulation pump 200 and the discharge port of the falling film evaporator 100.

[0043] In some of these embodiments, refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a check valve 1400. The check valve 1400 is disposed on the transfer pipeline 300 and is located at a position between the transfer circulation pump 200 and the discharge port of the falling film evaporator 100. The check valve 1400 is used to prevent the reverse flow of materials to ensure the normal and orderly progress of the transfer work.

[0044] In some of these embodiments, refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a pressure gauge 1500 after the pump. The pressure gauge 1500 after the pump is connected to the transfer circulation pump 200. The pressure gauge 1500 after the pump is used to display the pressure value of the transfer circulation pump 200.

[0045] In some of these embodiments, refer to Figure 1 As shown, a water inlet pipe 1700 for supplying water to the falling film evaporator 100 is further connected to the transfer pipeline 300. The water inlet pipe 1700 can be externally connected to a water source.

[0046] In some of these embodiments, refer to Figure 1 As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes an observation sight glass 1600. The observation sight glass 1600 is installed on the falling film evaporator 100 to implement the inspection of the falling film evaporator 100. The above-mentioned falling film evaporation device 10 for coal chemical industry wastewater also designs an observation sight glass 1600 at the sealing position of the water distribution tray at the top of the falling film evaporator 100. Operators can observe the water distribution situation of the water distribution tray in the falling film evaporator 100 at any time according to the observation sight glass 1600.

[0047] In some of these embodiments, refer to Figure 1As shown, the falling film evaporation device 10 for coal chemical industry wastewater further includes a vapor-liquid separator 1800, a compressor, and a heating mechanism. The vapor-liquid separator 1800 is connected to the feed port of the falling film evaporator 100. The transfer pipeline 300 is connected to the falling film evaporator 100 through the vapor-liquid separator 1800. The steam outlet of the vapor-liquid separator 1800 is communicated with the steam inlet of the falling film evaporator 100 through a steam pipeline. The compressor and the heating mechanism are connected to the steam pipeline. The vapor-liquid separator 1800 is used to realize the vapor-liquid separation of the material. After the separated steam is compressed by the compressor and heated by the heating mechanism, it flows back into the falling film evaporator 100 for material evaporation. The compressor and the heating mechanism are not shown in the drawings. The heating form of the heating mechanism can be set according to actual needs.

[0048] In some embodiments, the falling film evaporation device 10 for coal chemical industry wastewater further includes a plurality of Y-type filters. The plurality of Y-type filters are connected in parallel on the transfer pipeline 300, and one of the plurality of Y-type filters works. The plurality of Y-type filters can ensure the smoothness of the transfer pipeline 300 and avoid the interruption of the transfer pipeline 300 when one of the Y-type filters is blocked. The alternative use of the plurality of Y-type filters also facilitates the cleaning of the Y-type filters. The Y-type filters are not shown in the drawings. The Y-type filter is a commonly used pipeline accessory, and its main function is to intercept solid particles, impurities, and dirt in the fluid to protect key equipment such as valves, pumps, and instruments from damage. The Y-type filter is shaped like the letter "Y", and its structure consists of a Y-shaped housing, a filter screen (or filter element), a drain port, and related connecting flanges or threads. The working principle of the Y-type filter: when the fluid passes through the Y-type filter, the impurities will be intercepted by the filter screen, and the clean fluid will continue to flow through the filter screen. When too much impurity accumulates on the filter screen, it can be removed by opening the drain valve.

[0049] In some embodiments, the above-mentioned falling film evaporator 100, transfer circulation pump 200, conductivity detection component 400, flow detection component 500, cleaning inlet valve 900, cleaning discharge valve 1000, vent valve 1100, vent valve 1100, discharge valve 1300, check valve 1400, vapor-liquid separator 1800, compressor, and heating mechanism can all be electrically connected to the control mechanism.

[0050] In some embodiments, the control mechanism can be a PLC programmable logic controller. The control mechanism can perform corresponding program settings according to needs to improve the automation degree of the operation of the entire falling film evaporation device 10 for coal chemical industry wastewater.

[0051] During the operation of the above-mentioned falling film evaporation device 10 for coal chemical industry wastewater, the following steps are included:

[0052] Please refer to Figure 1As shown in the figure, the incoming water of the falling film evaporator 100 is transported to the inside of the falling film evaporator 100 by a pump through the incoming water pipe 1700. After the water level in the falling film evaporator 100 is ≥ 1.0 m, the transfer circulation pump 200 is started. The wastewater in the falling film evaporator 100 enters the water distribution tray through the transfer pipeline 300 via a Y-type filter for evaporation and concentration. One set of the multiple Y-type filters is always in use, and the other Y-type filters are kept in standby state. The new Y-type filter is switched in time according to the flow attenuation of the flowmeter on the transfer pipeline 300, and the fouled Y-type filter is cleaned in time and put into standby. The concentration multiple of the material can be observed according to the conductivity meter. When the conductivity is too high, the transfer needs to be carried out in time and fresh water is supplemented in time through the incoming water pipe 1700. During the operation period, the operator can observe the distribution of the concentrated salt wastewater liquid through the observation sight glass 1600 installed on the water distribution tray head, and can adjust the circulation flow rate of the falling film evaporator 100 by adjusting the operation frequency of the falling film transfer circulation pump 200, so as to optimize the water distribution of the water distribution tray to be more uniform and full. After the heat exchange tubes of the falling film evaporator 100 are fouled and the heat exchange efficiency decreases, the fouling substances can be judged according to the quality of the incoming water, and the cleaning agent is configured in the cleaning water tank 600. After the cleaning agent is configured, the falling film evaporator 100 is stopped. After the liquid in the falling film evaporator 100 is emptied, the cleaning liquid is injected into the falling film evaporator 100 by the cleaning pump 700. After the injection is completed, the cleaning pump 700 is closed, and the transfer circulation pump 200 is started for circulating cleaning. After the heat exchange tubes of the falling film evaporator 100 are cleaned, the cleaning liquid flows back to the cleaning water tank 600. After the cleaning liquid in the cleaning water tank 600 is cleaned multiple times, it can be emptied through the drain valve 1100, and the new cleaning liquid is configured for standby.

[0053] In summary, in the above falling film evaporation equipment 10 for coal chemical wastewater, relevant on-line instrument facilities such as the conductivity detection component 400 and the flow detection component 500 are added, which can on-line monitor data such as the conductivity and circulation flow rate of the wastewater, and timely adjust the falling film transfer amount and circulation amount of the falling film evaporator 100 according to the monitoring situation, so as to ensure the long-term, efficient and stable operation of the falling film evaporator 100.

[0054] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For the parts not detailed in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0055] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0056] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model shall be subject to the appended claims.

Claims

1. A falling film evaporation device for coal chemical wastewater, characterized in that, It includes a falling film evaporator, a transfer circulation pump, a transfer pipeline, a conductivity detection component and a flow rate detection component. The two ends of the transfer pipeline are respectively connected to the discharge port and the feed port of the falling film evaporator. The conductivity detection component and the flow rate detection component are respectively arranged on the transfer pipeline to detect the conductivity and flow rate of the material in the transfer pipeline. The transfer circulation pump is installed on the transfer pipeline to transfer materials for the falling film evaporator.

2. The falling film evaporation equipment for coal chemical industry wastewater according to claim 1, wherein The coal chemical wastewater falling film evaporation equipment further includes a cleaning water tank, a cleaning pump and a cleaning pipeline. One end of the cleaning pipeline is connected to the cleaning inlet of the falling film evaporator and the other end is connected to the transfer pipeline. The cleaning water tank is connected to the cleaning pipeline. The cleaning pump is installed on the cleaning pipeline to drive the cleaning liquid in the cleaning pipeline into the falling film evaporator for cleaning.

3. The falling film evaporation equipment for coal chemical industry wastewater according to claim 2, characterized in that, The coal chemical wastewater falling film evaporation equipment further includes a cleaning inlet valve and a cleaning discharge valve. Both the cleaning inlet valve and the cleaning discharge valve are arranged on the cleaning pipeline. The installation position of the cleaning inlet valve is closer to the falling film evaporator, and the installation position of the cleaning discharge valve is closer to the transfer pipeline.

4. The coal chemical wastewater falling film evaporation device according to claim 2, characterized in that, The coal chemical wastewater falling film evaporation equipment further includes an emptying valve. The emptying valve is installed on the cleaning water tank to control the emptying of the cleaning liquid in the cleaning water tank.

5. The falling film evaporation equipment for coal chemical wastewater according to any one of claims 1 to 4, characterized in that, The coal chemical wastewater falling film evaporation equipment further includes a feed valve. The feed valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the feed port of the falling film evaporator; and / or, the coal chemical wastewater falling film evaporation equipment further includes a discharge valve. The discharge valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the discharge port of the falling film evaporator.

6. The falling film evaporation equipment for coal chemical industry wastewater according to any one of claims 1 to 4, characterized in that Both the conductivity detection component and the flow rate detection component are located at a position between the transfer circulation pump and the discharge port of the falling film evaporator.

7. The falling film evaporation equipment for coal chemical wastewater according to any one of claims 1 to 4, characterized in that, The coal chemical wastewater falling film evaporation equipment further includes a check valve. The check valve is arranged on the transfer pipeline and is located at a position between the transfer circulation pump and the discharge port of the falling film evaporator.

8. The coal chemical wastewater falling film evaporation equipment according to any one of claims 1 to 4, characterized in that, The coal chemical wastewater falling film evaporation equipment further includes a pressure gauge behind the pump. The pressure gauge behind the pump is connected to the transfer circulation pump; and / or, a water supply pipe for supplying water to the falling film evaporator is further connected to the transfer pipeline; and / or, the coal chemical wastewater falling film evaporation equipment further includes an observation sight glass. The observation sight glass is installed on the falling film evaporator to inspect the falling film evaporator.

9. The coal chemical wastewater falling film evaporation equipment according to any one of claims 1 to 4, characterized in that, The coal chemical wastewater falling film evaporation device further includes a vapor-liquid separator, a compressor, and a heating mechanism. The vapor-liquid separator is connected to the feed port of the falling film evaporator. The transfer pipeline is connected to the falling film evaporator through the vapor-liquid separator. The steam outlet of the vapor-liquid separator is communicated with the steam inlet of the falling film evaporator through a steam pipeline. The compressor and the heating mechanism are connected to the steam pipeline. The vapor-liquid separator is used to achieve the vapor-liquid separation of the material. The separated steam is compressed by the compressor and heated by the heating mechanism and then flows back into the falling film evaporator for material evaporation.

10. The falling film evaporation equipment for coal chemical industry wastewater according to any one of claims 1 to 4, characterized in that, The coal chemical wastewater falling film evaporation device further includes a plurality of Y-type filters. The plurality of Y-type filters are connected in parallel on the transfer pipeline, and only one of the plurality of Y-type filters works.

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