A sodium pyroantimonate wastewater treatment device

Abstract

The present invention discloses a sodium pyroantimonate wastewater treatment device, which includes a storage tank and a plate evaporator. An inlet pump is provided between the storage tank and the plate evaporator. The storage tank is connected to the inlet of the inlet pump through a lifting pipe, and the plate evaporator is connected to the outlet of the inlet pump through a feed pipe. As a sodium pyroantimonate wastewater treatment device, the present invention utilizes a steam compressor and a vacuum pump to make the sodium pyroantimonate wastewater boil at 70 °C under a negative pressure of 0.7 MPa, and part of the water evaporates to form condensed water for reuse. The concentrated solution of sodium pyroantimonate wastewater contains 30% NaOH and trace amounts of heavy metals and is used as a raw material for producing sodium pyroantimonate. Before heating the sodium pyroantimonate wastewater, the present invention preheats it using a steam preheater to reduce the heat loss of heat exchange in the plate evaporator and improve the heat exchange efficiency at the same time.

Description

Technical Field

[0001] The present invention belongs to the technical field of wastewater treatment, and particularly relates to a device for treating sodium pyroantimonate wastewater. Background Art

[0002] Sodium pyroantimonate is widely used as a fining agent and decolorizing agent in the glass industry. It can resist sunlight exposure and has excellent lampworking properties; especially used in the production of high-grade glass such as photovoltaic glass, ultra-white solar glass, and optical glass. It is also used as a flame retardant in the plastics, rubber and other industries: it can also be used in the engineering plastics industry with low coloring power and saving pigments: and as a filler for enamel and acid-resistant ceramics.

[0003] In the industrial preparation method of sodium pyroantimonate, there are an acidic system and an alkaline system. The alkaline system uses antimony oxide as the raw material, and uses chlorine to oxidize the crude antimony oxide powder to prepare sodium pyroantimonate in a NaOH medium. This process uses a 20% NaOH solution to dissolve the crude antimony oxide, filters out insoluble impurities, and chlorinates the filtrate. The sodium pyroantimonate product produced by this preparation method of sodium pyroantimonate has good quality and low impurity content, and chlorine is inexpensive. Since an alkaline medium and chlorine are used, the corrosion sensitivity of the equipment is much lower than that of the acidic system. However, the solubility of antimony oxide in the alkaline system is not as good as that in the acidic system. Therefore, the productivity of this equipment is low, the alkali consumption is high, and the recovery rate is low;

[0004] Sodium pyroantimonate wastewater contains 2% NaOH and trace amounts of heavy metals. It is time-consuming and laborious to purify NaOH, and simply discharging it after treatment is undoubtedly a huge waste. Summary of the Invention

[0005] In order to solve the above problems existing in the prior art, the purpose of the present invention is to provide a device for treating sodium pyroantimonate wastewater.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A device for treating sodium pyroantimonate wastewater includes a storage tank and a plate evaporator. There is a feed pump between the storage tank and the plate evaporator. The storage tank is connected to the inlet of the feed pump through a lifting pipe, and the plate evaporator is connected to the outlet of the feed pump through a feed pipe; there are four ports on the plate evaporator, namely a feed port, a discharge port, an air inlet and an air outlet; the feed port is fixedly connected to the feed pipe, the air inlet is connected to the boiler steam pipeline, the air outlet is connected to a vacuum pump, and the discharge port is connected to a separator.

[0008] As a preference of the present invention, a raw material pool is provided on one side of the storage tank. There is a supply pump between the raw material pool and the storage tank. The inlet of the supply pump is connected to the raw material pool, and the outlet of the supply pump is connected to the storage tank through a supply pipe.

[0009] Preferably, a steam preheater is provided between the storage tank and the plate evaporator. The steam preheater is provided with a placement space, and the feed pipe in the placement space is arranged in an S shape. The placement space is communicated with the boiler steam pipeline.

[0010] Preferably, a plurality of raw material plates and steam plates are detachably installed in the plate evaporator, and the raw material plates and the steam plates are arranged alternately; a material cavity is provided in the raw material plate, and a herringbone corrugated groove is fixedly arranged on the inner wall of the cavity. Raw material steam ports, raw material concentration ports, raw material inlets and first alignment ports are respectively arranged at the four corners of the raw material plate; a steam cavity is provided in the steam plate, and an inverted herringbone corrugated groove is fixedly arranged on the inner wall of the steam cavity. Steam discharge ports, second alignment ports, third alignment ports and steam inlets are respectively arranged at the four corners of the steam plate.

[0011] Preferably, a thick water tank is provided on one side of the separator, a thick liquid pump is provided between the separator and the thick water tank, the inlet of the thick liquid pump is connected with the separator through a separation pipe, the outlet of the thick liquid pump is connected with the thick water tank through a thick liquid pipe, a thick water pipe is provided on one side of the thick water tank away from the thick liquid pipe, and a thick water pump is provided on one side of the thick water tank. The inlet of the thick water pump is fixedly connected with the thick water pipe.

[0012] Preferably, the air outlet is connected with the inlet of the vacuum pump through a steam outlet pipe. A condensate pump is provided on one side of the vacuum pump, the water outlet of the vacuum pump is connected with the inlet of the condensate pump, a clear water tank is provided on one side of the condensate pump, the outlet of the condensate pump is connected with the clear water tank through a condensate pipe, a clear water pump is provided on one side of the clear water tank away from the condensate pipe, and the inlet of the clear water pump is fixedly connected with the clear water pipe.

[0013] Preferably, a discharge pipe is fixedly provided at the discharge port. The side of the discharge pipe away from the plate evaporator is fixedly connected with the separator. A steam recovery pipe is fixedly provided at one end of the separator away from the separation pipe; a steam compressor is provided on one side of the separator. The separator is connected with the inlet of the steam compressor through the steam recovery pipe, and the outlet of the steam compressor is connected with the air inlet through a steam return pipe.

[0014] Preferably, a steam inlet and a steam outlet are fixedly provided on the steam preheater. A steam connection pipe is fixedly provided on the steam inlet, a steam inlet pipe is connected to one side of the steam connection pipe, and the end of the steam inlet pipe away from the steam connection pipe is connected with the air inlet. The steam return pipe is communicated with the steam inlet pipe; a recovery branch pipe is fixedly provided on the steam outlet, and the end of the recovery branch pipe away from the steam outlet is communicated with the steam recovery pipe.

[0015] Preferably, check valves are provided on both the recovery branch pipe and the steam return pipe; a steam-water separator is provided between the vacuum pump and the condensate pump.

[0016] Preferably, the feed pipe communicates with the raw material inlet, and the feed pipe penetrates through the third alignment port; the discharge pipe communicates with the raw material concentration port, and the discharge pipe penetrates through the second alignment port; the steam inlet pipe penetrates through the first alignment port, and the steam inlet pipe communicates with the steam inlet; the steam outlet pipe communicates with the raw material steam port, and the steam outlet pipe communicates with the steam discharge port.

[0017] The beneficial effects of the present invention are as follows: As a sodium pyroantimonate wastewater treatment device, the present invention uses a steam compressor and a vacuum pump to make the sodium pyroantimonate wastewater boil at 70°C under a negative pressure of 0.7 MPa, and part of the water evaporates to form condensate for reuse. The concentrated solution of sodium pyroantimonate wastewater contains 30% NaOH and trace amounts of heavy metals and is used as a raw material for producing sodium pyroantimonate. Before heating the sodium pyroantimonate wastewater, the present invention preheats it with a steam preheater to reduce the heat loss of heat exchange in the plate evaporator and improve the heat exchange efficiency at the same time. The secondary steam generated in the separator and the steam discharged from the steam preheater are both recovered by the steam compressor, and after the enthalpy increases, they are re-introduced into the steam inlet pipe through the steam return pipe and used as part of the heat source for evaporation in the plate evaporator, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following further describes the present invention in detail with reference to the drawings and specific implementation methods.

[0019] Figure 1 is a schematic structural diagram of the present invention;

[0020] Figure 2 is the present invention Figure 1 is an enlarged schematic structural diagram of part A of the present invention;

[0021] Figure 3 is the present invention Figure 1 is a schematic structural diagram of the main pipeline labels of the present invention;

[0022] Figure 4 is the present invention Figure 1 is an axonometric structural diagram from another perspective of the present invention;

[0023] Figure 5 is the present invention Figure 1 is a schematic structural diagram of the material plate of the present invention;

[0024] Figure 6 is the present invention Figure 1 is a schematic structural diagram of the steam plate of the present invention;

[0025] Figure 7 is the cross-sectional structural schematic diagram of the steam preheater of the present invention Figure 1 . Specific embodiments

[0026] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Generally, the components of the embodiments of the present invention described and illustrated herein can be arranged and designed in various different configurations.

[0027] Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but only represents the selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0028] The following is combined with Figure 1-7 to illustrate the specific embodiments of the present invention. A sodium pyroantimonate wastewater treatment device includes a storage tank 16 and a plate evaporator 20. A feed pump 24 is provided between the storage tank 16 and the plate evaporator 20. The storage tank 16 is connected to the inlet of the feed pump 24 through a lift pipe 36, and the plate evaporator 20 is connected to the outlet of the feed pump 24 through a feed pipe 35; four ports are provided on the plate evaporator 20, namely a feed port, a discharge port, an air inlet and an air outlet; the feed port is fixedly connected to the feed pipe 35, the air inlet is connected to a boiler steam pipeline, the air outlet is connected to a vacuum pump 23, and the discharge port is connected to a separator 22; the vacuum pump 23 can make the sodium pyroantimonate wastewater in a negative pressure state during the evaporation process, boil at a low temperature, improve the evaporation efficiency and reduce the evaporation energy consumption.

[0029] Beneficially, a raw material tank 12 is provided on one side of the storage tank 16. A supply pump 17 is provided between the raw material tank 12 and the storage tank 16. The inlet of the supply pump 17 is connected to the raw material tank 12, and the outlet of the supply pump 17 is connected to the storage tank 16 through a supply pipe 32; a liquid level monitoring device is provided in the storage tank 16 to always control the liquid level of the sodium pyroantimonate wastewater in the storage tank 16 at a suitable height, so that there is always a certain amount of sodium pyroantimonate wastewater in the storage tank 16 to ensure the continuous operation of the subsequent treatment process.

[0030] Beneficially, a steam preheater 18 is provided between the storage tank 16 and the plate evaporator 20. An installation space is provided inside the steam preheater 18. The feed pipe 35 inside the installation space is arranged in an S shape. The installation space is communicated with the boiler steam pipeline. The steam generated by the boiler heats the feed pipe 35 inside the installation space, preheats the sodium pyroantimonate wastewater passing through it, reduces the temperature difference between the sodium pyroantimonate wastewater and the steam in the plate evaporator 20, and reduces the heat exchange time.

[0031] Beneficially, a plurality of raw material plates 51 and steam plates 56 are detachably installed inside the plate evaporator 20. The raw material plates 51 and the steam plates 56 are arranged alternately; a material cavity is provided inside the raw material plate 51. Herringbone corrugated grooves are fixedly provided on the inner wall of the cavity. Raw material steam ports 52, raw material concentration ports 53, raw material inlets 54, and first alignment ports 55 are respectively provided at the four corners of the raw material plate 51; a steam cavity is provided inside the steam plate 56. Inverted herringbone corrugated grooves are fixedly provided on the inner wall of the steam cavity. Steam discharge ports 57, second alignment ports 58, third alignment ports 59, and steam inlets 60 are respectively provided at the four corners of the steam plate 56. The herringbone corrugated grooves and the inverted herringbone corrugated grooves respectively guide the sodium pyroantimonate wastewater and the steam to climb upward and downward, so as to cover the raw material plate 51 and the steam plate 56, increase the contact surface to achieve the purpose of rapid heat exchange. The alternately arranged raw material plates 51 and steam plates 56 are beneficial to the batch evaporation of the sodium pyroantimonate wastewater, and the number of the raw material plates 51 and the steam plates 56 can be flexibly designed according to the amount of the wastewater.

[0032] Beneficially, a concentrated water tank 13 is provided on one side of the separator 22. A concentrated liquid pump 25 is provided between the separator 22 and the concentrated water tank 13. The inlet of the concentrated liquid pump 25 is connected to the separator 22 through a separation pipe 39. The outlet of the concentrated liquid pump 25 is connected to the concentrated water tank 13 through a concentrated liquid pipe 40. A concentrated water pipe 33 is provided on the side of the concentrated water tank 13 away from the concentrated liquid pipe 40. A concentrated water pump 15 is provided on one side of the concentrated water tank 13. The inlet of the concentrated water pump 15 is fixedly connected to the concentrated water pipe 33; the concentrated liquid of the sodium pyroantimonate wastewater contains 30% NaOH and trace amounts of heavy metals and is used as a raw material for generating sodium pyroantimonate, which is energy-saving and environmentally friendly.

[0033] Beneficially, the air outlet is connected to the inlet of the vacuum pump 23 through a steam outlet pipe 44. A condensate pump 21 is provided on one side of the vacuum pump 23. The water outlet of the vacuum pump 23 is connected to the inlet of the condensate pump 21. A clear water tank 11 is provided on one side of the condensate pump 21. The outlet of the condensate pump 21 is connected to the clear water tank 11 through a condensate pipe 34. A clear water pump 14 is provided on the side of the clear water tank 11 away from the condensate pipe 34. The inlet of the clear water pump 14 is fixedly connected to the clear water pipe 31; after the sodium pyroantimonate wastewater boils, part of the water evaporates to form recycled condensate water, and recycling saves resources.

[0034] Beneficially, a discharge pipe 43 is fixedly provided at the discharge port. The side of the discharge pipe 43 away from the plate evaporator 20 is fixedly connected to the separator 22. A steam recovery pipe 38 is fixedly provided at one end of the separator 22 away from the separation pipe 39; a steam compressor 19 is provided on one side of the separator 22. The separator 22 is connected to the inlet of the steam compressor 19 through the steam recovery pipe 38. The outlet of the steam compressor 19 is connected to the air inlet through a steam return pipe 37;

[0035] Beneficially, a steam inlet 46 and a steam outlet 47 are fixedly provided on the steam preheater 18. A steam connection pipe 42 is fixedly provided on the steam inlet 46. A steam inlet pipe 45 is connected to one side of the steam connection pipe 42. The end of the steam inlet pipe 45 away from the steam connection pipe 42 is connected to the air inlet. The steam return pipe 37 is communicated with the steam inlet pipe 45; a recovery branch pipe 41 is fixedly provided on the steam outlet 47. The end of the recovery branch pipe 41 away from the steam outlet 47 is communicated with the steam recovery pipe 38; the secondary steam generated in the separator 22 and the steam discharged from the steam preheater 18 are both recovered by the steam compressor 19, and after the enthalpy increases, they are re-introduced into the steam inlet pipe 45 through the steam return pipe 37 as the heat source for evaporation of the plate evaporator 20.

[0036] Beneficially, check valves are provided on both the recovery branch pipe 41 and the steam return pipe 37; a steam-water separator is provided between the vacuum pump 23 and the condensate pump 21. After the steam with lost heat passes through the vacuum pump 23 and the steam-water separator, the gas is discharged and the condensate water enters the condensate pump 21.

[0037] Beneficially, the feed pipe 35 is connected to the raw material inlet port 54, and the feed pipe 35 passes through the third alignment port 59; the discharge pipe 43 is connected to the raw material concentration port 53, and the discharge pipe 43 passes through the second alignment port 58; the steam inlet pipe 45 passes through the first alignment port 55, and the steam inlet pipe 45 is connected to the steam inlet port 60; the steam outlet pipe 44 is connected to the raw material steam port 52, and the steam outlet pipe 44 is connected to the steam exhaust port 57.

[0038] Working principle of the present invention:

[0039] The wastewater generated by the production of sodium pyroantimonate enters the raw material pool 12, and the supply pump 17 stores it in the storage tank 16. The storage tank 16 is equipped with a liquid level monitoring device to control the liquid level of the sodium pyroantimonate wastewater in the storage tank 16 at a suitable height, so that a certain amount of sodium pyroantimonate wastewater is always maintained in the storage tank 16 to ensure the continuous operation of the subsequent treatment process and avoid the production progress from interfering with the wastewater treatment process;

[0040] When the valve at the bottom of the storage tank 16 is in an open state, the feed pump 24 is started, and the sodium antimonate wastewater in the storage tank 16 is pumped into the plate evaporator 20 through the feed pipe 35. During this process, when the feed pipe 35 passes through the steam preheater 18, the S-shaped coiled feed pipe 35 passes through the steam preheater 18 for many times; the steam generated by the boiler enters from the steam inlet 46 through the steam connecting pipe 42, and is then discharged from the steam outlet 47, heating the feed pipe 35 inside the placement space, and preheating the sodium antimonate wastewater passing through the feed pipe 35;

[0041] In the plate evaporator 20, the sodium pyroantimonate wastewater enters the raw material plate 51, and the steam generated by the boiler enters the steam plate 56 through the steam connecting pipe 42 and the steam inlet pipe 45. The sodium pyroantimonate wastewater enters the material cavity from the raw material inlet 54, and the steam generated by the boiler enters the steam cavity from the steam inlet 60, and the raw material plate 51 and the steam plate 56 begin to exchange heat;

[0042] The steam generated by the boiler spreads downward from the right side of the steam plate 56, then climbs up through its left side, and is discharged from its only pressure relief port, namely, the steam outlet 57, into the steam outlet pipe 44; the sodium pyroantimonate wastewater rises from the right side of the raw material plate 51, boils in the material chamber, and the sodium pyroantimonate wastewater generates steam that climbs along its right side and then is discharged from the raw material steam port 52 into the steam outlet pipe 44; the concentrated sodium pyroantimonate wastewater enters the left side and is discharged from the raw material concentration port 53 into the discharge pipe 43;

[0043] In the above process, the raw material plate 51 has one inlet and two outlets. Under normal conditions, the pressure at the raw material inlet 54 is less than the pressure at the raw material steam outlet 52, and the sodium pyroantimonate wastewater is not easy to climb in the material cavity. When the vacuum pump 23 is started, a negative pressure is formed in the material cavity through the steam outlet pipe 44, the pressure at the raw material steam outlet 52 decreases, and the sodium pyroantimonate wastewater can climb a certain height in the material cavity to increase its contact area with the steam plate 56. At the same time, in a negative pressure environment (about 0.7 MPa), the sodium pyroantimonate wastewater can boil at a low temperature, reducing heat loss, energy consumption and improving efficiency;

[0044] The steam generated by the sodium pyroantimonate wastewater and the gas cooled after heat exchange with the furnace steam, after passing through the steam outlet pipe 44 and the steam-water separator, the gas is discharged, and the condensate is pumped into the clear water tank 11 by the condensate pump 21 through the condensate pipe 34 for reuse;

[0045] The concentrated sodium pyroantimonate wastewater enters the separator 22 through the discharge pipe 43. At this time, the sodium pyroantimonate wastewater still has a lot of energy, and secondary steam is still generated in the separator 22. The secondary steam is collected by the steam compressor 19 through the steam recovery pipe 38, and after the enthalpy increases, it is re-introduced into the steam inlet pipe 45 through the steam return pipe 37 as the heat source for evaporation in the plate evaporator 20;

[0046] At the same time, the steam discharged from the steam outlet 47, through the recovery branch pipe 41, also joins the steam recovery pipe 38 and is collected by the steam compressor 19 together;

[0047] The sodium pyroantimonate concentrated solution is discharged from the bottom of the separator 22 and is pumped into the concentrated water tank 13 by the concentrated solution pump 25 through the concentrated solution pipe 40. The sodium pyroantimonate concentrated solution contains 30% NaOH and contains trace heavy metal elements, which is used as a production raw material.

[0048] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; 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 communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] The above content is only an example and explanation of the structure of the present invention. Those skilled in the art of the present technology make various modifications or supplements to the described specific embodiments or use similar methods for substitution. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims of the present invention, they should fall within the protection scope of the present invention.

Claims

1. A sodium pyroantimonate wastewater treatment device, characterized in that: It includes a storage tank and a plate evaporator. A feed pump is provided between the storage tank and the plate evaporator. The storage tank is connected to the inlet of the feed pump through a lift pipe, and the plate evaporator is connected to the outlet of the feed pump through a feed pipe; there are four ports on the plate evaporator, namely a feed port, a discharge port, an air inlet, and an air outlet; the feed port is fixedly connected to the feed pipe, the air inlet is connected to a boiler steam pipe, the air outlet is connected to a vacuum pump, and the discharge port is connected to a separator; a discharge pipe is fixedly provided at the discharge port, and the side of the discharge pipe away from the plate evaporator is fixedly connected to the separator. A concentrated water tank is provided on one side of the separator, and a concentrated liquid pump is provided between the separator and the concentrated water tank. The inlet of the concentrated liquid pump is connected to the separator through a separation pipe. A steam recovery pipe is fixedly provided at one end of the separator away from the separation pipe; a steam compressor is provided on one side of the separator. The separator is connected to the inlet of the steam compressor through the steam recovery pipe, and the outlet of the steam compressor is connected to the air inlet through a steam return pipe; a steam preheater is provided between the storage tank and the plate evaporator. A steam inlet and a steam outlet are fixedly provided on the steam preheater. A steam connection pipe is fixedly provided on the steam inlet. A steam inlet pipe is connected to one side of the steam connection pipe. The end of the steam inlet pipe away from the steam connection pipe is connected to the air inlet, and the steam return pipe is communicated with the steam inlet pipe; a recovery branch pipe is fixedly provided on the steam outlet. The end of the recovery branch pipe away from the steam outlet is communicated with the steam recovery pipe.

2. The sodium pyroantimonate wastewater treatment device according to claim 1, characterized in that: A raw material tank is provided on one side of the storage tank. A supply pump is provided between the raw material tank and the storage tank. The inlet of the supply pump is connected to the raw material tank, and the outlet of the supply pump is connected to the storage tank through a supply pipe.

3. The sodium pyroantimonate wastewater treatment device according to claim 2, characterized in that: An installation space is provided in the steam preheater. The feed pipe in the installation space is arranged in an S shape, and the installation space is communicated with the boiler steam pipe.

4. The sodium pyroantimonate wastewater treatment device according to claim 3, characterized in that: A plurality of raw material plates and steam plates are detachably installed in the plate evaporator. The raw material plates and the steam plates are arranged alternately; a material cavity is provided in the raw material plate. Herringbone corrugated grooves are fixedly provided on the inner wall of the cavity. Four corners of the raw material plate are respectively provided with a raw material steam port, a raw material concentration port, a raw material inlet, and a first alignment port; a steam cavity is provided in the steam plate. Inverted herringbone corrugated grooves are fixedly provided on the inner wall of the steam cavity. Four corners of the steam plate are respectively provided with a steam discharge port, a second alignment port, a third alignment port, and a steam inlet.

5. The sodium pyroantimonate wastewater treatment device according to claim 1, characterized in that: The outlet of the concentrated liquid pump is connected to the concentrated water tank through a concentrated liquid pipe. A concentrated water pipe is provided on the side of the concentrated water tank away from the concentrated liquid pipe. A concentrated water pump is provided on one side of the concentrated water tank. The inlet of the concentrated water pump is fixedly connected to the concentrated water pipe.

6. The sodium pyroantimonate wastewater treatment device according to claim 4, characterized in that: The air outlet is connected to the inlet of the vacuum pump through a steam outlet pipe. A condensate pump is provided on one side of the vacuum pump. The water outlet of the vacuum pump is connected to the inlet of the condensate pump. A clear water tank is provided on one side of the condensate pump. The outlet of the condensate pump is connected to the clear water tank through a condensate pipe. A clear water pump is provided on one side of the clear water tank away from the condensate pipe. The inlet of the clear water pump is fixedly connected to a clear water pipe.

7. The sodium pyroantimonate wastewater treatment device according to claim 6, characterized in that: One-way valves are provided on both the recovery branch pipe and the steam return pipe; a steam-water separator is provided between the vacuum pump and the condensate pump.

8. The sodium pyroantimonate wastewater treatment device according to claim 6, characterized in that: The feed pipe communicates with the raw material inlet, and the feed pipe penetrates through the third alignment port; the discharge pipe communicates with the raw material concentration port, and the discharge pipe penetrates through the second alignment port; the steam inlet pipe penetrates through the first alignment port, and the steam inlet pipe communicates with the steam inlet; the steam outlet pipe communicates with the raw material steam port, and the steam outlet pipe communicates with the steam discharge port.

Images