Waste liquid evaporation treatment equipment and evaporation process for waste alkali liquid treatment

Abstract

The invention relates to the technical field of waste lye treatment, and discloses waste liquid evaporation treatment equipment and an evaporation process for waste lye treatment.The waste liquid evaporation treatment equipment comprises an evaporation assembly, a feeding assembly is arranged on one side of the evaporation assembly, an agent assembly is arranged on the outer side of the feeding assembly, and valve assemblies are arranged in the agent assembly and the feeding assembly; a heating assembly is arranged on one side of the evaporation assembly, and a circulation assembly is arranged between the heating assembly and the evaporation assembly. According to the device, the rotating end of the valve assembly is rotated, so that the waste alkali liquid and a defoaming agent can flow into the feeding assembly at the same time and are mixed, and under the assistance of the defoaming agent, the waste alkali liquid does not generate a foam phenomenon when being evaporated; therefore, a medium in the heating assembly can better exchange heat with the waste alkali liquid which continuously circulates, and meanwhile, the actual evaporation capacity of the evaporation crystallizer is not reduced when the waste alkali liquid is evaporated, so that the energy consumption and the operation cost are reduced when the equipment works.

Description

Technical Field

[0001] The invention relates to the technical field of waste alkali liquor treatment, and in particular to waste liquid evaporation treatment equipment and an evaporation process for treating the waste alkali liquor. Background Art

[0002] Waste lye is a waste liquid containing a large amount of pollutants generated during the petrochemical production process, resulting from the use of NaOH solution to absorb H2S, alkali-wash oil products, and cracked gas. To prevent environmental damage, the pH of the waste lye is adjusted to neutral using waste acid. The treated waste lye is then treated in an evaporative crystallizer, allowing the alkali in the waste lye to be recovered through crystallization.

[0003] The main component of the waste alkali liquid after neutralization treatment is inorganic salt sodium sulfate, but the waste alkali liquid has the characteristic of high COD, and is prone to foaming during the ordinary evaporation crystallization process. Since the space of the evaporation crystallizer is limited, the presence of foam will reduce the contact area between the liquid and the heating surface. In addition, the foam may cover the heating tube, so that the heat cannot be effectively transferred to the liquid. Due to the influence of foam, the actual evaporation amount of the evaporation crystallizer when evaporating the waste alkali liquid will be reduced, which will extend the time required for evaporation and increase energy consumption and equipment operating costs.

[0004] Currently, no effective solutions have been proposed for the problems in related technologies. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides a waste liquid evaporation treatment equipment and an evaporation process for treating waste alkali liquid, which has the advantages that the waste alkali liquid is not easy to generate foam during evaporation, and solves the problem that due to the influence of foam, the actual evaporation amount of the evaporation crystallizer when evaporating the waste alkali liquid will be reduced, the time required for evaporation will be extended, and the energy consumption and equipment operating costs will be increased.

[0006] The evaporation device provided by the present invention specifically includes an evaporation component, a feeding component, a medicine component, a valve component, a heating component and a circulation component;

[0007] The evaporation assembly includes a precipitation cylinder, an evaporation cylinder, a converging cover and a connecting cylinder. The inner wall of the connecting cylinder is provided with a plurality of corrugated plates. The connecting cylinder is movably connected to the converging cover. The evaporation cylinder is detachably connected to the precipitation cylinder and the converging cover respectively. A positioning assembly is also provided at the connection between the evaporation cylinder and the converging cover.

[0008] The feed assembly includes a feed pipe and a stirring device. A sealing plate and a support plate are installed on the inner wall of the feed pipe. The stirring device is installed on the support plate. The stirring device is provided with a fan blade, the fan blade is close to the water outlet end of the feed pipe, and the sealing plate is close to the water inlet end of the feed pipe. The feed pipe is connected to the evaporation cylinder.

[0009] The circulation component is connected to the evaporation cylinder through a return pipe and to the settling cylinder through an extraction pipe. The heating component is connected to the converging cover through a steam pipe. The heating component is arranged between the circulation component and the evaporation cylinder.

[0010] The medicine component is connected to the feed pipe, and the valve component is respectively connected to the medicine component and the sealing plate.

[0011] Preferably, the medicine assembly includes a sealing cover, a medicine barrel and a medicine dosing tube, the medicine dosing tube is installed at the bottom of the medicine barrel, the medicine barrel is detachably connected to the sealing cover, a one-way valve is installed inside the medicine dosing tube, the medicine dosing tube is connected to the feed pipe, and the one-way valve is connected to the valve assembly.

[0012] Preferably, the valve assembly includes two sets of rotating shafts and a control disk, the two sets of rotating shafts are respectively provided with sprockets, the two sets of sprockets are connected by chains, the two sets of rotating shafts are respectively connected to the sealing plate and the medicine assembly, and the control disk is installed on the rotating shaft connected to the sealing plate.

[0013] Preferably, the heating assembly includes a heating box, a heating pipe and a steam compressor outlet pipe. The outlet pipe is installed on the heating box. Two groups of diversion boxes are provided inside the heating box. The two groups of diversion boxes are respectively provided with a plurality of diversion holes on opposite sides. A plurality of heating pipes are provided between the diversion holes corresponding to the two groups of diversion boxes. The two groups of diversion boxes are connected to the heating pipes through the diversion holes. The air inlet end of the steam compressor is connected to the converging cover through the steam pipe, and the air outlet end is connected to the diversion box through the connecting pipe.

[0014] Preferably, the circulation component includes a circulation pump, a U-shaped tube and several guide tubes. The guide tube is arranged inside the heating tube. The different guide tubes are connected through the U-shaped tube. The inlet of the circulation pump is connected to the sedimentation cylinder through the extraction tube, and the outlet is connected to the guide tube inlet through the transport pipe. The guide tube outlet is connected to the evaporation cylinder through the return pipe. The transport pipe, return pipe, guide tube and U-shaped tube port connection are provided with a sealing device.

[0015] Preferably, the sealing device includes a sealing groove and a sealing ring. The ports of the transport pipe, return pipe and U-shaped pipe are respectively provided with sealing grooves, and the port of the guide pipe is provided with a sealing ring, which is placed in the sealing groove.

[0016] Preferably, a receiving groove is provided on the inner wall of the convergence cover, and the connecting tube is placed in the receiving groove.

[0017] Preferably, the evaporation cylinder is detachably connected to the sedimentation cylinder and the converging cover respectively by bolts.

[0018] Preferably, the positioning assembly includes a positioning hole and a positioning rod, the positioning hole is provided on the evaporating cylinder, the positioning rod is installed on the convergence cover, and the positioning rod is placed in the positioning hole.

[0019] Preferably, the stirring device includes a rotating roller and a stirring frame, the stirring frame and the fan blades are respectively mounted on the rotating roller, and the rotating roller is mounted on a support plate.

[0020] The present invention also provides an evaporation process based on the above evaporation equipment:

[0021] The rotating shaft is rotated by the control disk, and the one-way valve and the sealing plate are driven to rotate at the same time with the cooperation of the sprocket and the chain. At this time, the waste alkali liquid flows into the interior of the feed pipe, and the defoaming agent inside the medicine cylinder flows into the interior of the feed pipe through the dosing pipe. When the waste alkali liquid flows inside the feed pipe, the fan blades are driven to rotate, and the rotating roller is further driven to rotate, so that the stirring frame stirs the waste alkali liquid and defoaming agent inside the feed pipe. Then the waste alkali liquid flows into the interior of the evaporating cylinder through the feed port, and further flows into the interior of the sedimentation cylinder. The circulating pump extracts the waste alkali liquid inside the sedimentation cylinder through the extraction pipe. The extracted waste alkali liquid passes through the interior of the heating box under the guidance of the transport pipe, several guide pipes, several U-shaped pipes and the reflux pipe and flows into the interior of the evaporating cylinder again; at the same time, the steam compressor transports steam to the interior of the upper diversion box through the connecting pipe, and the steam inside the diversion box exchanges heat with the waste alkali liquid inside the several guide pipes through several diversion holes and heating pipes, and the condensed water converted from steam flows out through the outflow pipe; when the heated waste alkali liquid flows to the interior of the evaporating cylinder, the generated steam flows upward and flows through the steam pipe to the interior of the steam compressor 506, and the waste alkali liquid repeats the above flow again.

[0022] The present invention has the following advantages:

[0023] (1) High-efficiency vapor-liquid separation and anti-foaming design: Several corrugated plates are fixed on the inner wall of the connecting tube. When the steam rises, the entrained liquid droplets hit the corrugated plates, achieving vapor-liquid separation through inertial impact and physical adsorption. The mist is adsorbed on the surface of the corrugated plates and falls to the sedimentation tube due to gravity after gathering, preventing the droplets from entering the steam system. The steam flows forward by inertia, maintaining pure steam output. This significantly reduces the evaporation space occupied by foam, ensures that the surface of the heating tube is not covered by foam, and improves heat exchange efficiency.

[0024] (2) The layered evaporation-precipitation integrated structure has an evaporation cylinder and a precipitation cylinder connected vertically. After the waste alkali liquid is heated and evaporated in the evaporation cylinder, the concentrated liquid falls directly to the bottom of the precipitation cylinder. The crystallized product settles naturally in the precipitation cylinder to prevent the crystals from clogging the evaporation area. This achieves spatial isolation between evaporation and crystallization, improves evaporation efficiency, and ensures the integrity of the crystal particles.

[0025] (3) Removable maintenance design: The convergence cover is fixed by the positioning rod and the positioning hole of the evaporation tube. The connecting tube can be movably stored in the storage groove of the convergence cover. The corrugated plate can be quickly disassembled for cleaning, solving the efficiency loss problem caused by scaling in traditional equipment. The positioning structure ensures installation accuracy and avoids the separation effect affected by misalignment.

[0026] (4) Heat energy recycling: The steam compressor recycles steam, and the steam generated by the evaporation component is compressed and heated before being introduced into the heating pipe as a heat source. This reduces external energy input and significantly reduces operating costs.

[0027] (5) Circulating heating improves the concentration efficiency. The circulating component drives the waste alkali liquid to flow through the heating tube multiple times. The waste alkali liquid in the sedimentation cylinder is pumped to the heating box by the circulating pump and flows back and forth in the guide tube and the U-shaped tube. The waste alkali liquid is heated multiple times in the heating tube and gradually concentrated to an oversaturated state. The detachable design facilitates the cleaning of scale and maintains long-term efficient operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0029] Figure 1 It is a schematic diagram of the external contour structure of the present invention.

[0030] Figure 2 For the present invention Figure 1 Rear view structural diagram.

[0031] Figure 3 It is a schematic diagram of the internal structure of the heating box of the present invention.

[0032] Figure 4 It is a schematic cross-sectional structural diagram of the diverter box of the present invention.

[0033] Figure 5 For the present invention Figure 4 A in the figure is an enlarged structural diagram.

[0034] Figure 6 It is a schematic structural diagram of the evaporation component of the present invention.

[0035] Figure 7 It is a schematic diagram of the evaporation tube structure of the present invention.

[0036] Figure 8 It is a schematic diagram of the corrugated plate structure of the present invention.

[0037] Figure 9It is a schematic diagram of the structure of the pharmaceutical component of the present invention.

[0038] Figure 10 It is a schematic diagram of the cross-sectional structure of the L-shaped feeding pipe of the present invention.

[0039] Figure 11 It is a schematic structural diagram of the stirring frame of the present invention.

[0040] In the figure: 1-evaporation assembly; 101-precipitation cylinder; 102-evaporation cylinder; 103-convergence cover; 104-storage tank; 105-connecting cylinder; 106-corrugated plate; 107-positioning hole; 108-positioning rod; 2-feeding assembly; 201-connecting seat; 202-feeding port; 203-L-shaped feeding pipe; 3-medicament assembly; 301-support frame; 302-medicament cylinder; 303-dosing pipe; 304-one-way valve; 305-sealing cover; 306-support plate; 307-rotating roller; 308-fan blade; 309-stirring frame; 4 -valve assembly; 401-rotating shaft; 402-sealing plate; 403-sprocket; 404-chain; 405-control panel; 5-heating assembly; 501-heating box; 502-diverter box; 503-diverter hole; 504-heating tube; 505-connecting tube; 506-steam compressor; 507-steam pipe; 508-outflow pipe; 6-circulation assembly; 601-extraction pipe; 602-circulating pump; 603-transport pipe; 604-return pipe; 605-U-shaped pipe; 606-sealing groove; 607-sealing ring; 608-guide pipe. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] Example 1

[0043] Combined with attachment Figure 1-11 A waste liquid evaporation treatment equipment includes an evaporation component 1, a feeding component 2, a reagent component 3, a valve component 4, a heating component 5 and a circulation component 6.

[0044] The evaporation assembly 1 includes a settling tube 101, an evaporation tube 102, a converging cover 103, and a connecting tube 105. The inner wall of the converging cover 103 is provided with a receiving groove 104, and the inner wall of the connecting tube 105 is provided with a plurality of corrugated plates 406. The connecting tube 105 is placed in the receiving groove 104. The bottom of the evaporation tube 102 is connected to the settling tube 101 by bolts, and the top of the evaporation tube 102 is connected to the converging cover 103 by bolts. A positioning assembly is also provided at the connection between the evaporation tube 102 and the converging cover 103. The positioning assembly includes a positioning hole 107 and a positioning rod 108. The positioning hole 107 is provided on the evaporation tube 102, and the positioning rod 108 is installed on the converging cover 103. The positioning rod 108 is placed in the positioning hole 107.

[0045] The feeding assembly 2 includes an L-shaped feeding pipe 203 and a rotating roller 307. The L-shaped feeding pipe 203 is equipped with a sealing plate 402 and two groups of support plates 306. The two groups of support plates 306 are respectively close to the water inlet and water outlet of the L-shaped feeding pipe 203. The rotating roller 307 is provided with a stirring frame 309 and a fan blade 308. The two ends of the rotating roller 307 are respectively installed on the support plates 306. The fan blade 308 is close to the water outlet of the L-shaped feeding pipe 203, and the sealing plate 402 is close to the water inlet of the L-shaped feeding pipe 203. That is, the water inlet, sealing plate 402, first group of support plates 306, rotating roller 307, fan blade 308, second group of support plates 306 and water outlet are arranged in sequence inside the L-shaped feeding pipe 203 according to the feeding direction.

[0046] The medicine assembly 3 includes a sealing cap 305, a medicine barrel 302 and a medicine feeding tube 303. The medicine feeding tube 303 is installed at the bottom of the medicine barrel 302. A one-way valve 304 is installed inside the medicine feeding tube 303. The medicine barrel 302 is connected to the sealing cap 305 via a thread.

[0047] The valve assembly 4 includes two sets of rotating shafts 401 and a control disk 405. The two sets of rotating shafts 401 are respectively provided with sprockets 403. The two sets of sprockets 403 are connected by a chain 404. The two sets of rotating shafts 401 are respectively connected to the sealing plate 402 and the one-way valve 304. The control disk 405 is installed on the rotating shaft 401 connected to the sealing plate 402.

[0048] The heating assembly 5 includes a heating box 501, a heating tube 504, a steam compressor 506, and an outflow pipe 508. Two sets of manifold boxes 502 are provided inside the heating box 501. The two manifold boxes 502 have a plurality of diversion holes 503 on opposite sides thereof. A plurality of heating tubes 504 are provided between the corresponding diversion holes 503 of the two manifold boxes 502. The two manifold boxes 502 are connected to the heating tubes 504 via the diversion holes 503. The outlet end of the steam compressor 506 is connected to the manifold boxes 502 via a connecting tube 505. The outflow pipe 508 is installed at the bottom of the manifold box 502.

[0049] The circulation assembly 6 includes a circulation pump 602 , a U-shaped tube 605 and a plurality of flow guide tubes 608 . The flow guide tubes 608 are arranged inside the heating tube 504 , and the different flow guide tubes 608 are connected through the U-shaped tubes 605 .

[0050] The inlet of the circulation pump 602 is connected to the settling cylinder 101 through the extraction pipe 601, the outlet of the circulation pump 602 is connected to the inlet of the guide pipe 608 through the transport pipe 603, and the outlet of the guide pipe 608 is connected to the evaporation cylinder 102 through the return pipe 604. That is, the material passes through the settling cylinder 101, the extraction pipe 601, the inlet of the circulation pump 602, the outlet of the circulation pump 602, the transport pipe 603, the first guide pipe 608, the first U-shaped pipe 605, the Nth guide pipe 608, the Nth U-shaped pipe 605 and the return pipe 604 in sequence, and finally reaches the evaporation cylinder 102. The ports of the transport pipe 603, the return pipe 604 and the U-shaped pipe 605 are respectively provided with sealing grooves 606, and the port of the guide pipe 608 is provided with a sealing ring 607, and the sealing ring 607 is placed in the sealing groove 606.

[0051] The L-shaped feed pipe 203 is mounted on the evaporator cylinder 102 via the connector 201. The outlet of the L-shaped feed pipe 203 is connected to the feed port 202 on the evaporator cylinder 102. The medicine cylinder 302 is mounted on the settling cylinder 101 via the support frame 301. The dosing tube 303 is connected to the L-shaped feed pipe 203. The air inlet of the steam compressor 506 is connected to the converging cover 103 via the steam pipe 507.

[0052] The operating principle of the present invention is as follows:

[0053] The waste alkali liquid flows into the interior of the L-shaped feed pipe 203 through the inlet, and the defoaming agent in the medicine barrel 302 flows into the interior of the L-shaped feed pipe 203 through the dosing pipe 303 and the one-way valve 304 in turn. The setting of the one-way valve 304 prevents the waste alkali liquid from flowing into the medicine barrel 302 through the dosing pipe 303.

[0054] The waste alkali liquid impacts the fan blade 308 during the flow inside the L-shaped feed pipe 203, causing the fan blade 308 to drive the rotating roller 307 to rotate, and the rotating roller 307 further drives the stirring frame 309 to rotate, stirring the waste alkali liquid and defoaming agent inside the L-shaped feed pipe 203, so that the waste alkali liquid and defoaming agent are fully mixed.

[0055] After the waste alkali liquid flows out from the L-shaped feed pipe 203, it passes through the evaporation cylinder 102 and falls into the sedimentation cylinder 101. At this time, the circulation pump 602 extracts the waste alkali liquid inside the sedimentation cylinder 101 through the extraction pipe 601, and then sends it into the guide pipe 608 through the transport pipe 603. After passing through several guide pipes 608 and U-shaped pipes 605, it finally returns to the evaporation cylinder 102 through the reflux pipe 604. Because the guide tube 608 is arranged inside the heating tube 504, the waste alkali liquid will exchange heat with the steam inside the heating tube 504 during the flow inside the guide tube 608. When the heated waste alkali liquid flows into the evaporation tube 102, steam will be generated. The steam will move upward with droplets and come into contact with the corrugated plate 106. When the steam hits the corrugated plate 106, the speed and direction of the steam suddenly change. Due to inertial impact and physical adsorption, the gas and liquid are effectively separated, and the steam continues to move upward, while the mist is adsorbed on the surface of the corrugated plate 106, and then flows downward under the action of gravity, and continues to gather and grow. When the weight of the droplets is greater than the lifting force of the rising air flow, it falls back into the sedimentation tube 101. As the waste alkali liquid continues to circulate, the waste alkali liquid is gradually concentrated and eventually concentrated into a supersaturated solution, thereby forming a crystalline product. At this time, the crystals can be precipitated to the bottom of the sedimentation tube 101.

[0056] The steam continues to rise and flows into the steam compressor 506 through the steam pipe 507 on the converging cover 103. Under the compression of the steam compressor 506, the temperature of the steam rises rapidly and flows into the diversion box 502 through the connecting pipe 505. The steam inside the diversion box 502 flows into the heating pipe 504 through several diversion holes 503. At this time, the steam can heat the guide pipe 608 inside the heating pipe 504 and exchange heat with the waste alkali liquid inside the guide pipe 608. The steam that completes the heat exchange is converted into condensed water and discharged through the outflow pipe 508.

[0057] Furthermore, when cleaning the corrugated plate 106, the converging cover 103 can be removed from the top of the evaporating tube 102 by loosening the bolts, and then the connecting tube 105 can be removed from the receiving groove 104, making it easier to clean the corrugated plate 106. During installation, the positioning rods 108 are inserted into the positioning holes 107 and the converging cover 103 and the evaporating tube 102 are fixed with bolts. The positioning rods 108 and the positioning holes 107 prevent the connecting tube 105 from moving during use.

[0058] When one set of rotating shafts 401 is rotated by the control disk 405, the other set of rotating shafts 401 will be driven to rotate through the cooperation of the sprocket 403 and the chain 404, so that the two sets of rotating shafts 401 can respectively drive the sealing plate 402 and the one-way valve 304 to rotate to adjust the flow of waste alkali liquid and defoaming agent.

[0059] When cleaning the guide tube 608, remove the two groups of diversion boxes 502 from the inside of the heating box 501, and then remove the heating tube 504 from between the two groups of diversion boxes 502. At this time, the two groups of diversion boxes 502 are separated, and the guide tube 608 can be directly removed from between the two groups of diversion boxes 502, making it more convenient to clean the guide tube 608.

[0060] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A waste liquid evaporation treatment equipment, characterized in that: Including evaporation component, feeding component, medicine component, valve component, heating component and circulation component; The evaporation assembly includes a precipitation cylinder, an evaporation cylinder, a converging cover and a connecting cylinder. The inner wall of the connecting cylinder is provided with a plurality of corrugated plates. The connecting cylinder is movably connected to the converging cover. The evaporation cylinder is detachably connected to the precipitation cylinder and the converging cover respectively. A positioning assembly is also provided at the connection between the evaporation cylinder and the converging cover. The feed assembly includes a feed pipe and a stirring device. A sealing plate and a support plate are installed on the inner wall of the feed pipe. The stirring device is installed on the support plate. The stirring device is provided with a fan blade, the fan blade is close to the water outlet end of the feed pipe, and the sealing plate is close to the water inlet end of the feed pipe. The feed pipe is connected to the evaporation cylinder. The circulation component is connected to the evaporation cylinder through a return pipe and to the settling cylinder through an extraction pipe. The heating component is connected to the converging cover through a steam pipe. The heating component is arranged between the circulation component and the evaporation cylinder. The medicine component is connected to the feed pipe, and the valve component is respectively connected to the medicine component and the sealing plate.

2. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The medicine assembly includes a sealing cover, a medicine barrel and a medicine feeding tube. The medicine feeding tube is installed at the bottom of the medicine barrel. The medicine barrel is detachably connected to the sealing cover. A one-way valve is installed inside the medicine feeding tube. The medicine feeding tube is connected to the feed pipe. The one-way valve is connected to the valve assembly.

3. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The valve assembly includes two sets of rotating shafts and a control disk. The two sets of rotating shafts are respectively provided with sprockets. The two sets of sprockets are connected by chains. The two sets of rotating shafts are respectively connected to the sealing plate and the medicine assembly. The control disk is installed on the rotating shaft connected to the sealing plate.

4. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The heating assembly includes a heating box, a heating pipe and a steam compressor outlet pipe. The outlet pipe is installed on the heating box. Two groups of diversion boxes are provided inside the heating box. The two groups of diversion boxes are opened on opposite sides and respectively provided with a plurality of diversion holes. A plurality of heating pipes are provided between the diversion holes corresponding to the two groups of diversion boxes. The two groups of diversion boxes are connected to the heating pipes through the diversion holes. The air inlet end of the steam compressor is connected to the converging cover through the steam pipe, and the air outlet end is connected to the diversion box through the connecting pipe.

5. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The circulation component includes a circulation pump, a U-shaped tube and several guide tubes. The guide tube is arranged inside the heating tube. The different guide tubes are connected through the U-shaped tube. The inlet of the circulation pump is connected to the sedimentation cylinder through the extraction tube, and the outlet is connected to the guide tube inlet through the transport pipe. The guide tube outlet is connected to the evaporation cylinder through the return pipe. The transport pipe, return pipe, guide tube and U-shaped tube port are connected with a sealing device.

6. The waste liquid evaporation treatment equipment according to claim 5, characterized in that: The sealing device includes a sealing groove and a sealing ring. The ports of the transport pipe, return pipe and U-shaped pipe are respectively provided with sealing grooves, and the port of the guide pipe is provided with a sealing ring, which is placed in the sealing groove.

7. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The inner wall of the convergence cover is provided with a receiving groove, and the connecting tube is placed in the receiving groove.

8. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The evaporation cylinder is detachably connected to the precipitation cylinder and the convergence cover by bolts.

9. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The positioning assembly includes a positioning hole and a positioning rod. The positioning hole is provided on the evaporating cylinder. The positioning rod is installed on the convergence cover. The positioning rod is placed in the positioning hole.

10. The waste liquid evaporation treatment equipment according to claim 1, characterized in that: The stirring device comprises a rotating roller and a stirring frame, the stirring frame and the fan blades are respectively mounted on the rotating roller, and the rotating roller is mounted on a supporting plate.

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