Phosphoric acid sewage treatment device

Abstract

The utility model discloses a phosphoric acid sewage treatment device which is characterized in that an input port of a filter is communicated with phosphoric acid sewage derived from phosphoric acid production, an evaporation tank receives primary purified water output by the filter, a jacket is arranged on the peripheral wall and / or the bottom of the evaporation tank, and an input port of the jacket is communicated with an output port of a steam generation device of a phosphoric acid production system; a sewage steam return port is formed in the top and / or the upper end of the evaporation tank, a concentrated sewage discharge port is formed in the inner bottom of the evaporation tank, and the condensation water collector is communicated with the sewage steam return port. Compared with the prior art, two byproducts, namely steam and phosphoric acid sewage, derived from phosphoric acid production are subjected to cooperative treatment, water resources are recycled in an energy-saving and environment-friendly manner by utilizing steam produced by enterprises, double-effect energy conservation and environment protection are realized, the phosphoric acid sewage is differentiated into industrial purified water and industrial-grade phosphoric acid raw materials at low cost, the phosphoric acid recovery rate is increased, and the energy-saving and environment-friendly effects are realized. The economic benefit is increased, the sewage discharge is reduced, the environment quality is improved, and the treatment capacity and treatment difficulty of neutralization pollution are greatly reduced.

Description

Technical Field

[0001] The utility model relates to phosphoric acid production and processing, in particular to a phosphoric acid wastewater treatment device. Background Art

[0002] During the production of phosphoric acid, a large amount of phosphoric acid wastewater is generated and the wastewater discharge volume is large, wasting a lot of water resources.

[0003] Some companies use sodium hydroxide to neutralize the effluent, and the pH value is difficult to control. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems mentioned above and provides a phosphoric acid wastewater treatment device, which can organically combine and treat the two by-products of steam and phosphoric acid wastewater derived from phosphoric acid production, recycle water resources in the form of heat recovery, and differentiate the phosphoric acid wastewater into industrial clean water and industrial-grade phosphoric acid raw materials.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A phosphoric acid wastewater treatment device comprises a filter, an evaporation tank and a condensation water collector, wherein the input port of the filter is suitable for connecting with phosphoric acid wastewater derived from phosphoric acid production, the evaporation tank is suitable for receiving primary purified water output by the filter, the peripheral wall and / or the bottom of the evaporation tank is a jacket, the input port of the jacket is suitable for connecting with the output port of a steam generating device of a phosphoric acid production system, the output port of the jacket is suitable for heat source steam to reflux to the steam generating device or for heat source steam to flow to the condensation water collector, a sewage steam return port is provided at the top and / or the upper end of the evaporation tank, a concentrated sewage discharge port is provided at the inner bottom of the evaporation tank, and the condensation water collector is connected with the sewage steam return port.

[0007] Compared with the prior art, the beneficial effects of the present application include: being able to synergistically process the two by-products of phosphoric acid production, steam and phosphoric acid wastewater, utilizing the enterprise's own steam, recycling water resources in an energy-saving and environmentally friendly manner by heat recovery, achieving dual-effect energy conservation and environmental protection, and differentiating phosphoric acid wastewater into industrial clean water and industrial-grade phosphoric acid raw materials at low cost, thereby improving the phosphoric acid recovery rate, increasing economic benefits, reducing wastewater discharge, improving environmental quality, and greatly reducing the amount and difficulty of neutralizing pollution.

[0008] As an improvement of the above technical solution, the filter is higher than the evaporation tank, and the filter is connected to the phosphoric acid wastewater through a wastewater lifting pump.

[0009] As an improvement of the above technical solution, a plurality of evaporation tanks are provided, and the filter is suitable for supplying primary purified water to the plurality of evaporation tanks.

[0010] As an improvement of the above technical solution, the evaporation tank includes an outer tank, an inner tank and a tank cover, and the outer tank and the inner tank, or the outer tank, the inner tank and the tank cover define the jacket.

[0011] As an improvement of the above technical solution, a plurality of pads are spaced apart on the inner bottom of the outer groove, and the plurality of pads are suitable for collectively padding the inner groove, and a portion between the bottoms of the outer groove and the inner groove is defined as a partial structure of the jacket.

[0012] As an improvement of the above technical solution, the outer groove is provided with an air avoidance hole located at the corresponding pad block, the outer bottom of the inner groove is convexly provided with a concentrated sewage discharge pipe, the air avoidance hole is suitable for the concentrated sewage discharge pipe to pass through, and a first sealing ring surrounding the air avoidance hole is connected between the pad block and the inner groove.

[0013] As an improvement of the above technical solution, the peripheral wall of the outer groove is provided with an annular groove extending in the circumferential direction, and the groove cover covers the annular groove so that the annular groove is defined as an outer clamping cavity, and the upper ends of the outer clamping cavity and the jacket are connected, and the input port of the annular groove is higher than its inner bottom and is suitable for connecting to the output port of the steam generating device of the phosphoric acid production system.

[0014] As an improvement of the above technical solution, a steam input pipe is provided on the side wall of the outer groove, and the steam input pipe passes through the jacket. The part of the steam input pipe inserted into the annular groove is provided with a plurality of peripheral wall through holes connected to the annular groove.

[0015] As an improvement of the above technical solution, the steam input pipe is arranged at the lower end of the evaporation tank, and the steam reflux pipe is arranged at the upper end of the evaporation tank, and the steam reflux pipe is suitable for reflux heat source steam in the outer clamp chamber and the jacket.

[0016] As an improvement of the above technical solution, the filter includes a tank body, a filter element and a tank cover. A partition is provided in the tank body to divide the chamber of the tank body into an upper chamber and a lower chamber. The tank cover is suitable for pressing the filter element so that the opening of the filter element is downwardly connected to the water hole of the partition. The peripheral wall of the lower chamber is provided with an input port of the filter, the bottom of the lower chamber is provided with an impurity discharge port of the filter, and the output port of the filter is opened at the upper end of the chamber between the outer wall of the filter element and the inner wall of the tank body. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0018] Figure 1 This is a plan layout diagram of a phosphoric acid wastewater treatment device according to an embodiment of the utility model;

[0019] Figure 2 for Figure 1 A schematic diagram showing the filter structure of a phosphoric acid wastewater treatment device;

[0020] Figure 3 for Figure 2 An exploded view of the filter is shown;

[0021] Figure 4 for Figure 1 A schematic plan view of an evaporation tank of a phosphoric acid wastewater treatment plant is shown;

[0022] Figure 5 for Figure 1 A schematic diagram showing the three-dimensional structure of the evaporation tank of the phosphoric acid wastewater treatment device;

[0023] Figure 6 for Figure 5 A cross-sectional view showing an evaporation tank;

[0024] Figure 7 for Figure 6 An exploded view of the evaporation tank is shown.

[0025] The accompanying drawings are only one specific embodiment of the present invention, and the form and structure of this specific embodiment should not limit the expansion of other embodiments.

[0026] Sewage lifting pump 100;

[0027] Filter 200, tank body 210, partition 211, impurity discharge port 212, filter element 220, tank cover 230;

[0028] Evaporation tank 300, jacket 310,

[0029] Outer groove 320, pad 321, air avoidance hole 322, annular groove 323, steam input pipe 324, steam return pipe 325, observation port 326;

[0030] Inner tank 330, concentrated wastewater discharge port 331, concentrated wastewater discharge pipe 332;

[0031] Tank cover 340, sewage steam return port 341, second sealing ring 350;

[0032] Condensate collector 400;

[0033] Liquid injection valve 510, heating valve 520, steam return valve 530, sewage recovery valve 540. DETAILED DESCRIPTION

[0034] 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 of 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.

[0035] Reference Figure 1 , Figure 4 The utility model provides a phosphoric acid wastewater treatment device, comprising a filter 200, an evaporation tank 300 and a condensation water collector 400. The input port of the filter 200 is suitable for connecting with phosphoric acid wastewater derived from phosphoric acid production. The evaporation tank 300 is suitable for receiving primary purified water output by the filter 200. The peripheral wall and / or bottom of the evaporation tank 300 is a jacket 310. The input port of the jacket 310 is suitable for connecting with the output port of a steam generating device of a phosphoric acid production system. The output port of the jacket 310 is suitable for heat source steam to flow back to the steam generating device or for heat source steam to flow to the condensation water collector 400. A sewage steam return port 341 is provided at the top and / or upper end of the evaporation tank 300. A concentrated sewage discharge port 331 is provided at the inner bottom of the evaporation tank 300. The condensation water collector 400 is connected to the sewage steam return port 341.

[0036] In some designs, the heat source steam flows directly through the jacket 310 .

[0037] In other preferred designs, a coil is placed inside the jacket 310, and then the jacket 310 is filled with heat-conductive particles or heat-conductive glue, and the heat source steam flows directly through the coil. One end of the coil is connected to the heat source steam (i.e., the output port of the steam generating device of the phosphoric acid production system), and the other end of the coil is suitable for the heat source steam to flow back to the steam generating device or to flow to the condenser 400. In this design, the directional nature of the heat source steam flow is improved.

[0038] Reference Figures 1 to 3 The filter 200 includes a tank body 210 and a filter element 220 contained in the tank body 210, such as a bag filter element or a cartridge filter element. The filter element 220 divides the tank body 210 into a primary chamber (including the lower chamber and the inner chamber of the filter element described below) and a secondary chamber. The primary chamber is connected to the phosphoric acid wastewater, and the phosphoric acid wastewater is filtered to become primary purified water in the secondary chamber. The mesh of the filter element 220 can be about 200 meshes, and the filter element 220 is suitable for filtering out particulate impurities.

[0039] Reference Figure 1 Preferably, the filter 200 is higher than the evaporation tank 300, and the filter 200 is connected to the phosphoric acid wastewater through the wastewater lifting pump 100.

[0040] In some settings, the filter 200 supplies primary purified water to the evaporation tank 300 through the injection valve 510, and the filter 200 is directly connected to the phosphoric acid wastewater collection box of the phosphoric acid production system; when the liquid level of the evaporation tank 300 is close to the low level line, the injection valve 510 is opened, and the phosphoric acid wastewater is supplied to the evaporation tank 300 after passing through the filter 200 by gravity pressure. When the liquid level of the evaporation tank 300 is close to the high level line, the injection valve 510 is closed. The evaporation tank 300 is provided with a primary purified water level observation window, and the primary purified water level observation window is covered with a transparent cover. The injection valve 510 can be a ball valve, a gate valve, a plug valve, a butterfly valve, a solenoid valve, etc.

[0041] Preferably, the evaporation tank 300 is provided with a low liquid level sensor and a high liquid level sensor, and the filter 200 is connected to the phosphoric acid wastewater through a water pump, such as the above-mentioned wastewater lifting pump 100; the low liquid level sensor is electrically connected to the water pump through a central controller or a relay, and the electrical signal of the low liquid level sensor is suitable for controlling the start of the water pump, and the high liquid level sensor is electrically connected to the water pump through a central controller or a relay, and the electrical signal of the high liquid level sensor is suitable for controlling the shutdown of the water pump. For example, the low liquid level sensor is normally closed when not triggered, and the high liquid level sensor is normally closed when not triggered, and the two are connected in series with the relay coil, and the low liquid level sensor is connected in parallel with the normally open contact of the relay, and another normally open contact of the relay is connected in series with the water pump (or, the another normally open contact of the relay is connected to the water pump through an AC contactor).

[0042] The high liquid level of the evaporation tank 300 is defined based on the standard that a certain amount of sewage steam overflows and buffer space remain in the upper part of the evaporation tank 300.

[0043] In some settings, the low liquid level of the evaporation tank 300 is defined by the standard that a certain amount of concentrated sewage storage space is left at the bottom of the evaporation tank 300. In the unspecified design, a liquid inlet pipe connected to the filter 200 is provided at the top of the evaporation tank 300, and the liquid inlet pipe is suitable for supplying water by inserting into the liquid surface of the evaporation tank 300. The low liquid level of the evaporation tank 300 is defined by the standard that it is close to the lower end of the liquid inlet pipe.

[0044] Reference Figure 1 The operation process of the utility model is as follows: in the production of thermal phosphoric acid, phosphoric acid wastewater and heat source steam are derived, the heat source steam reaches about 180°C, and when the impurity discharge port 212 of the filter 200 is closed, the phosphoric acid wastewater is discharged into the filter 200, and the filter 200 is suitable for filtering impurities in the phosphoric acid wastewater, such as particulate impurities;

[0045] The primary purified water obtained by filtration is introduced into the evaporation tank 300, the heating valve 520 of the steam inlet of the evaporation tank 300 is opened, and the jacket 310 of the evaporation tank 300 is introduced with heat source steam, the heat source steam is 0.5Mpa, and the initial temperature is about 180°C. The heat source steam is suitable for heating the primary purified water in the evaporation tank 300, so that the primary purified water overflows water vapor after the temperature is increased, and the water vapor is introduced into the condensation water collector 400 through the sewage steam return port 341;

[0046] In the condenser 400, the sewage steam is cooled and condensed, and the condenser 400 collects industrial clean water suitable for industrial applications.

[0047] The sewage steam return port 341 is provided with a steam return valve 530. When the heat source steam heats the evaporation tank 300 for a certain period of time, or the primary purified water in the evaporation tank 300 is heated to a certain value, a certain amount of sewage steam is filled in the upper part of the evaporation tank 300, and the steam return valve 530 is opened at this time. Preferably, the evaporation tank 300 is provided with a temperature sensor, which is a glass thermometer or an electronic thermometer. In some designs, the condensate collector 400 adopts static natural cooling. When the primary purified water in the evaporation tank 300 reaches 80°C, the steam return valve 530 is opened; in some designs, the condensate collector 400 includes a condensing pipe and a condensing fan that blows natural wind toward the condensing pipe. When the primary purified water in the evaporation tank 300 reaches 70°C, the steam return valve 530 is opened.

[0048] In steady-state operation, the primary purified water in the evaporation tank 300 is heated to 100°C, the primary purified water boils, and the water evaporates. The remaining concentrated wastewater contains a certain concentration of phosphoric acid, which can be recycled and processed into industrial-grade phosphoric acid in a waste-to-treasure manner.

[0049] Reference Figure 1 When the filtering work of the filter 200 is stopped, the impurity discharge port 212 of the filter 200 can be opened to regularly remove impurities in the filter 200 so that the filter 200 can maintain high efficiency.

[0050] Reference Figure 1 The concentrated wastewater discharge port 331 of the evaporation tank 300 is provided with a wastewater recovery valve 540. When the phosphoric acid wastewater purification is suspended periodically and the filter 200 and the evaporation tank 300 are maintained, the concentrated wastewater discharge port 331 of the evaporation tank 300 is opened. Alternatively, the filter 200 supplies primary purified water to the evaporation tank 300 at a certain flow rate, the heat source steam supplies heat energy at a certain flow rate, and the concentrated wastewater discharge port 331 continues to discharge at a low speed.

[0051] Furthermore, the filter 200 is connected to the evaporation tank 300 through a flow rate regulating valve, and the input port of the jacket 310 of the evaporation tank 300 is connected to the heat source steam through the flow rate regulating valve.

[0052] The heating valve 520, the steam return valve 530, the sewage recovery valve 540, etc. can be a ball valve, a gate valve, a plug valve, a butterfly valve, a solenoid valve, and each valve body can be opened and closed manually or electrically controlled.

[0053] Reference Figure 1 More preferably, a plurality of evaporation tanks 300 are provided, and the filter 200 is suitable for supplying primary purified water to the plurality of evaporation tanks 300 .

[0054] Compared with the prior art, the beneficial effects of the present application include: being able to synergistically process the two by-products of phosphoric acid production, steam and phosphoric acid wastewater, utilizing the enterprise's own steam, recycling water resources in an energy-saving and environmentally friendly manner by heat recovery, achieving dual-effect energy conservation and environmental protection, and differentiating phosphoric acid wastewater into industrial clean water and industrial-grade phosphoric acid raw materials at low cost, thereby improving the phosphoric acid recovery rate, increasing economic benefits, reducing wastewater discharge, improving environmental quality, and greatly reducing the amount and difficulty of neutralizing pollution.

[0055] Reference Figure 1 , Figures 4 to 7 In some embodiments of the present invention, the evaporation tank 300 includes an outer tank 320, an inner tank 330 and a tank cover 340, and the outer tank 320 and the inner tank 330, or the outer tank 320, the inner tank 330 and the tank cover 340 define a jacket 310. In the present invention, the cleaning and maintenance of the outer tank 320, the inner tank 330, the tank cover 340 and the jacket 310 are relatively convenient and thorough.

[0056] Reference Figure 1 , Figure 4 , Figure 7 In some embodiments of the utility model, a plurality of pads 321 are spaced apart on the inner bottom of the outer tank 320, and the plurality of pads 321 are suitable for collectively padding the inner tank 330. The bottoms of the outer tank 320 and the inner tank 330 are defined as a partial structure of the jacket 310, so that the inner tank 330 and its primary purified water are heated more fully and quickly.

[0057] Reference Figure 1 , Figure 4 In some embodiments of the utility model, the outer tank 320 is provided with a hole 322 corresponding to the cushion block 321, and the outer bottom of the inner tank 330 is provided with a concentrated sewage discharge pipe 332. The hole 322 is suitable for the concentrated sewage discharge pipe 332 to pass through. A first sealing ring surrounding the hole 322 is connected between the cushion block 321 and the inner tank 330. Therefore, the inner tank 330 and the outer tank 320 are detachable, and the structure between the inner tank 330 and the outer tank 320 is relatively simple. The inner tank 330 can be matched with the outer tank 320 by lowering the inner tank 330.

[0058] Reference Figure 1 , Figure 4 , Figure 6In some embodiments of the utility model, the peripheral wall of the outer tank 320 is provided with an annular groove 323 extending in the circumferential direction, and the groove cover 340 covers the annular groove 323, so that the annular groove 323 is defined as an outer clamping cavity, and the upper ends of the outer clamping cavity and the jacket 310 are connected, and the input port of the annular groove 323 is higher than its inner bottom, and is suitable for connecting to the output port of the steam generating device of the phosphoric acid production system. In the utility model, a double-layer heat source steam is used to heat the evaporation tank 300. When a certain amount of water is accumulated in the jacket 310 due to condensation (the highest temperature of the jacket is about 100°C of boiling water), the outer clamping cavity / annular groove 323 continuously circulates the heat source steam (about 180°C), and the un-immersed part of the jacket 310 continuously circulates the heat source steam (about 180°C), and the evaporation tank 300 and its primary purified water continuously have a high-temperature heat source.

[0059] Reference Figure 1 , Figure 4 and Figure 6 The upper ends of the outer clamping cavity and the jacket 310 are connected, and only one heat source steam reflux port / steam reflux pipe 325 of the evaporation tank 300 can be opened.

[0060] Reference Figure 1 , Figure 4 , Figure 6 , Figure 7 A steam input pipe 324 is provided on the side wall of the outer groove 320. The steam input pipe 324 passes through the jacket 310. The part where the steam input pipe 324 is inserted into the annular groove 323 is provided with a plurality of peripheral wall through holes connected to the annular groove 323. Therefore, the steam input pipe 324 is higher than the inner bottom of the annular groove 323 and the inner bottom of the jacket 310.

[0061] Reference Figure 1 , Figures 4 to 7 A steam input pipe 324 is provided at the lower end of the evaporation tank 300, and a steam return pipe 325 is provided at the upper end of the evaporation tank 300. The steam return pipe 325 is suitable for returning heat source steam to the outer chamber and the jacket 310. Steam is a heavy fluid compared to gas and the like, and has a tendency to settle when standing still. The outer chamber and the jacket 310 of the utility model flow heat source steam from bottom to top in a reverse manner, and the outer chamber and the unwatered part of the jacket 310 are effectively filled with heat source steam, so that the primary purified water in the inner tank 330 is fully and effectively heated.

[0062] Reference Figure 1 , Figure 4 , Figure 5 In some embodiments of the utility model, the outer tank 320 is provided with an observation port 326 which passes through the jacket 310, the observation port 326 is suitable for observing the liquid level of the jacket 310, and is encapsulated with a transparent cover sheet, and the outer tank 320 is provided with a drainage hole which passes through the jacket 310, and the drainage hole is detachably connected with a plug.

[0063] Reference Figure 1 , Figure 4 , Figure 6 , Figure 7 In some embodiments of the utility model, a second sealing ring 350 is connected between the outer groove 320, the inner groove 330 and the groove cover 340 to cover the upper end of the annular groove 323 and the upper end of the jacket 310, thereby defining an outer clamping cavity and the jacket 310 which are connected at the upper ends.

[0064] Reference Figures 1 to 3 In some embodiments of the utility model, the filter 200 includes a tank body 210, a filter element 220 and a tank cover 230. A partition 211 is provided in the tank body 210 to separate the chamber of the tank body 210 into an upper chamber and a lower chamber. The tank cover 230 is suitable for pressing the filter element 220 so that the opening of the filter element 220 faces downward to connect with the water hole of the partition 211. The peripheral wall of the lower chamber is provided with an input port of the filter 200, and the bottom of the lower chamber is provided with an impurity discharge port 212 of the filter 200. The upper end of the chamber between the outer wall of the filter element 220 and the inner wall of the tank body 210 is provided with an output port of the filter 200. In the utility model, the tank body 210, the tank cover 230 and the filter element 220 are convenient to disassemble, assemble and maintain; the sewage flows from bottom to top in the filter 200, which is convenient for the precipitation of impurities. After the impurities are precipitated, they accumulate at the bottom and are far away from the flow path of the sewage.

[0065] The above embodiments are only used to illustrate the technical solution of the utility model but not to limit it. Any modification or equivalent substitution that does not deviate from the spirit and scope of the utility model shall be included in the scope of the technical solution of the utility model.

Claims

1. A phosphoric acid wastewater treatment device, characterized in that: include: A filter having an inlet adapted to be connected to phosphoric acid wastewater derived from phosphoric acid production; An evaporation tank, suitable for receiving the primary purified water output by the filter, the peripheral wall and / or the bottom of the evaporation tank being a jacket, the input port of the jacket being suitable for connecting to the output port of the steam generating device of the phosphoric acid production system, the output port of the jacket being suitable for the heat source steam to flow back to the steam generating device or for the heat source steam to flow to the condenser, a sewage steam return port being provided at the top and / or the upper end of the evaporation tank, and a concentrated sewage discharge port being provided at the inner bottom of the evaporation tank; The condensation water collector is connected to the sewage steam return port.

2. The phosphoric acid wastewater treatment device according to claim 1, characterized in that: The filter is higher than the evaporation tank, and the filter is connected to the phosphoric acid wastewater through a wastewater lifting pump.

3. The phosphoric acid wastewater treatment device according to claim 1, characterized in that: A plurality of evaporation tanks are provided, and the filter is suitable for supplying primary purified water to the plurality of evaporation tanks.

4. The phosphoric acid wastewater treatment device according to claim 1, characterized in that: The evaporation tank comprises an outer tank, an inner tank and a tank cover, and the outer tank and the inner tank, or the outer tank, the inner tank and the tank cover define the jacket.

5. The phosphoric acid wastewater treatment device according to claim 4, characterized in that: A plurality of pads are spaced apart on the inner bottom of the outer tank, and the plurality of pads are suitable for collectively padding the inner tank. The portion between the bottoms of the outer tank and the inner tank defines a partial structure of the jacket.

6. The phosphoric acid wastewater treatment device according to claim 5, characterized in that: The outer groove is provided with an air avoidance hole located at the corresponding pad block, the outer bottom of the inner groove is convexly provided with a concentrated sewage discharge pipe, the air avoidance hole is suitable for the concentrated sewage discharge pipe to pass through, and a first sealing ring surrounding the air avoidance hole is connected between the pad block and the inner groove.

7. The phosphoric acid wastewater treatment device according to any one of claims 4 to 6, characterized in that: The peripheral wall of the outer groove is provided with an annular groove extending in the circumferential direction, and the groove cover covers the annular groove so that the annular groove is defined as an outer clamping cavity, and the upper ends of the outer clamping cavity and the jacket are connected, and the input port of the annular groove is higher than its inner bottom and is suitable for connecting to the output port of the steam generating device of the phosphoric acid production system.

8. The phosphoric acid wastewater treatment device according to claim 7, characterized in that: The side wall of the outer tank is provided with a steam input pipe, the steam input pipe penetrates the jacket, and the portion of the steam input pipe inserted into the annular groove is provided with a plurality of peripheral wall through holes communicating with the annular groove.

9. The phosphoric acid wastewater treatment device according to claim 8, characterized in that: The steam input pipe is arranged at the lower end of the evaporation tank, and the steam reflux pipe is arranged at the upper end of the evaporation tank. The steam reflux pipe is suitable for reflux heat source steam in the outer clamp chamber and the jacket.

10. The phosphoric acid wastewater treatment device according to any one of claims 1 to 6, characterized in that: The filter comprises a tank body, a filter element and a tank cover, wherein a partition is arranged in the tank body to divide the chamber of the tank body into an upper chamber and a lower chamber, and the tank cover is suitable for pressing the filter element so that the opening of the filter element is downwardly connected to the water hole of the partition, the peripheral wall of the lower chamber is provided with an input port of the filter, the bottom of the lower chamber is provided with an impurity discharge port of the filter, and the output port of the filter is provided at the upper end of the chamber between the outer wall of the filter element and the inner wall of the tank body.

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