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CN-121974424-A - High-salinity wastewater multi-effect evaporation and salinity recovery integrated device

CN121974424ACN 121974424 ACN121974424 ACN 121974424ACN-121974424-A

Abstract

The invention relates to the technical field of energy-saving wastewater treatment equipment, in particular to a multi-effect evaporation and salt recovery integrated device for high-salt wastewater, which comprises a plurality of crystallization kettles arranged from left to right, a heating kettle, a heating mechanism, a crystallization mechanism and a recovery mechanism, wherein the heating kettles are arranged in a plurality of modes and correspond to the crystallization kettles one by one, the heating kettle is arranged in front of the crystallization kettle, the heating mechanism is arranged in the heating kettle, the crystallization mechanism is arranged in the crystallization kettle, the recovery mechanism is arranged below the crystallization kettle, the multi-effect evaporation scheme is selected according to the existing problems, the high-grade heat source and the low-grade heat source are combined to realize multi-surface heating of the high-salt wastewater, the full utilization of energy is realized, the pollution emission is reduced, meanwhile, the wastewater is heated and crystallized with high efficiency, the recovery treatment of the crystallization salt is realized, the heat energy is effectively utilized, the energy is saved, and the recovery and the post-treatment utilization of the salt in the wastewater are realized.

Inventors

  • YI WEIFENG
  • ZHOU QIAO
  • WANG JUAN
  • WEI TIANTIAN
  • XU XIAOYAN

Assignees

  • 江苏瑞达环保科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260327

Claims (10)

  1. 1. The multi-effect evaporation and salt recovery integrated device for the high-salt wastewater comprises a plurality of crystallization kettles (1), wherein the crystallization kettles (1) are arranged from left to right, and the device is characterized by further comprising: The heating kettles (2) are arranged in a one-to-one correspondence manner with the crystallization kettles (1), and the heating kettles (2) are arranged in front of the crystallization kettles (1); the heating mechanism (3), the said heating mechanism (3) is set up in heating the kettle (2); The crystallization mechanism (4), the said crystallization mechanism (4) is set up in the crystallization kettle (1); And the recovery mechanism (5) is arranged below the crystallization kettle (1).
  2. 2. The multi-effect evaporation and salt recovery integrated device for high-salt wastewater according to claim 1, wherein the heating mechanism (3) comprises: the heating coils (3-1), wherein a plurality of the heating coils (3-1) are arranged in the heating kettle (2) from top to bottom in a group; The heating device comprises heating fixing seats (3-2), wherein a plurality of heating fixing seats (3-2) are arranged in a group and are fixedly arranged on side plates of a heating kettle (2) in a penetrating way, and an inlet end and an outlet end of a heating coil (3-1) are arranged outside the heating kettle (2) after penetrating through the heating fixing seats (3-2); the heating air inlet valve (3-3), the heating air inlet valve (3-3) is fixed on the lower part of the side plate of the heating kettle (2) in a penetrating way; the pressure regulating air outlet valve (3-4), the pressure regulating air outlet valve (3-4) is fixed on the top plate of the heating kettle (2) in a penetrating way.
  3. 3. The multi-effect evaporation and salt recovery integrated device for high-salt wastewater is characterized in that a liquid inlet main pipe (6) and a liquid outlet main pipe (7) are arranged in front of each heating kettle (2) in a one-to-one correspondence mode, inlet ends of heating coils (3-1) in one heating kettle (2) are arranged on the liquid inlet main pipe (6) in parallel, outlet ends of the heating coils (3-1) are arranged on the liquid outlet main pipe (7) in parallel, liquid supplementing pipes (8) are arranged above the plurality of heating kettles (2) in an erected mode, and the plurality of liquid inlet main pipes (6) are arranged on the liquid supplementing pipes (8) in parallel.
  4. 4. The multi-effect evaporation and salt recovery integrated device for high-salt wastewater, which is characterized in that a pressurizing pump (9) is arranged on the side of the heating kettle (2), the pressurizing pump (9) is arranged on the liquid outlet main pipe (7) in series, the outlet end of the liquid outlet main pipe (7) is fixedly arranged at the lower part of a side plate of the crystallization kettle (1) in a penetrating way, and the axial direction of the liquid outlet main pipe (7) is tangential to one of the concentric circle sides of the cross section of the crystallization kettle (1).
  5. 5. The multi-effect evaporation and salt recovery integrated device for high-salt wastewater according to claim 4, wherein the crystallization mechanism (4) comprises: the spray header (4-1), the said spray header (4-1) is fixed to upper inner wall of the crystallization kettle (1); The crystallization plate (4-2), the said crystallization plate (4-2) is set up in the inside of the crystallization kettle (1), and the crystallization plate (4-2) erects in the inferior part of the shower head (4-1); The heat conduction pipe (4-3), the heat conduction pipe (4-3) is arranged in the crystallization kettle (1), and the heat conduction pipe (4-3) is arranged below the crystallization plate (4-2); The conical hopper (4-4), the conical hopper (4-4) is buckled and fixedly arranged on the lower port of the crystallization kettle (1), and one port of the liquid outlet main pipe (7) connected with the crystallization kettle (1) is arranged above the conical hopper (4-4); The waste gas pipe (4-5), the waste gas pipe (4-5) is fixed on the top plate of the crystallization kettle (1) in a penetrating way; The circulating pump (4-6), circulating pump (4-6) fixed setting on the roof of crystallization kettle (1), the entrance point of circulating pump (4-6) passes through the pipe connection and inserts and establish in crystallization kettle (1), the exit end of circulating pump (4-6) passes through the pipe connection setting with shower head (4-1).
  6. 6. The multi-effect evaporation and salt recovery integrated device of high-salt wastewater is characterized in that the crystallization plate (4-2) is arranged in an upward protruding conical structure, the heating bin (10) is buckled on the lower surface of the crystallization plate (4-2), the spiral partition plate (11) is fixedly arranged in the heating bin (10), the upper side edge of the spiral partition plate (11) is abutted to the lower surface of the crystallization plate (4-2), the waste heat air inlet pipe (12) is fixedly arranged on the heating bin (10) in a penetrating manner, the lower end of the waste heat air inlet pipe (12) is inserted into the outer side edge of the heating bin (10) and is communicated with the inner cavity of the heating bin (10), the waste heat fixing seat (13) is fixedly arranged on the side plate of the crystallization kettle (1) in a penetrating manner, the upper end of the air inlet pipe (12) penetrates through the crystallization plate (4-2) and is fixedly arranged on the waste heat fixing seat (13), the air outlet pipe (14) is fixedly arranged on the waste heat fixing seat (13) in a penetrating manner, and one end of the air outlet pipe (14) is positioned in the crystallization kettle (1) and is arranged on the inner cavity (4-10) in a penetrating manner.
  7. 7. The multi-effect evaporation and salt recovery integrated device of high salt wastewater according to claim 6, wherein the crystallization kettle (1) is internally and fixedly provided with a mounting frame (15), the mounting frame (15) is rotatably connected with a supporting shaft (16) through a bearing, the upper end of the supporting shaft (16) is fixedly provided with a rotating arm (17), the rotating arm (17) is erected below a heating bin (10), one end, far away from the supporting shaft (16), of the rotating arm (17) is fixedly provided with a scraping plate (18), the lower side edge of the scraping plate (18) is movably abutted against the upper surface of a crystallization plate (4-2), the mounting frame (15) is fixedly provided with a gear cabin (19), the lower end of the supporting shaft (16) is rotatably connected with the gear cabin (19) through a bearing, the mounting frame (15) is rotatably provided with a transmission shaft (20) through a bearing, one end of the transmission shaft (20) is rotatably connected with a side plate of the gear cabin (19) through a bearing, one end of the transmission shaft (20) is inserted between one end of the gear cabin (19) and the supporting shaft (16) and one end of the supporting shaft (16) is fixedly connected with a side plate of the motor (16) through a bearing (21), the side plate is rotatably connected with the side plate (1) through a bearing (21) of the transmission shaft, the side plate is rotatably connected with the side plate is fixedly arranged on the crystallization kettle through the side plate (1), an output shaft of the driving motor (21) is in transmission connection with an end shaft of the transmission shaft (20).
  8. 8. The multi-effect evaporation and salt recovery integrated device of high-salt wastewater according to claim 7, wherein a spline rod (22) is fixedly arranged on one side of the gear cabin (19) on the mounting frame (15), a spline sleeve (23) is movably sleeved on the spline rod (22), a supporting frame (24) is fixedly arranged on the spline sleeve (23), the heat-conducting pipe (4-3) is fixedly arranged on the supporting frame (24), a sealing sleeve (25) is fixedly arranged on a side plate of the crystallization kettle (1) in a penetrating manner, a guide seat (26) is movably arranged in the sealing sleeve (25), and an inlet end and an outlet end of the heat-conducting pipe (4-3) are both fixedly arranged on the guide seat (26) in a penetrating manner.
  9. 9. The multi-effect evaporation and salt recovery integrated device of high-salinity wastewater according to claim 8, wherein a deflector rod (27) is fixedly arranged at one end of the support shaft (16) penetrating out to the lower part of the gear chamber (19), a wedge seat (28) is fixedly arranged at one end of the spline housing (23) facing the gear chamber (19), the deflector rod (27) is matched with the wedge seat (28), a support spring (29) is sleeved on the spline rod (22), one end of the support spring (29) is propped against the end head of the spline rod (22), and the other end of the support spring (29) is propped against the end wall of the spline housing (23).
  10. 10. The multi-effect evaporation and salt recovery integrated device for high-salt wastewater according to claim 9, wherein the recovery mechanism (5) comprises: The sedimentation bin (5-1) is arranged below the conical hopper (4-4); the auger (5-2) is arranged in the sedimentation bin (5-1), and an end shaft of the auger (5-2) is rotatably arranged on an end plate of the sedimentation bin (5-1) through a bearing; the discharging motor (5-3) is fixedly arranged on the outer side wall of the sedimentation bin (5-1), and an output shaft of the discharging motor (5-3) is in transmission connection with one end shaft of the auger (5-2); the connecting bin (5-4), connecting bin (5-4) wear to be fixed on the roof of deposit storehouse (5-1), and connecting bin (5-4) link up setting with deposit storehouse (5-1), connecting bin (5-4) cover is established and is fixed on the lower port of toper fill (4-4).

Description

High-salinity wastewater multi-effect evaporation and salinity recovery integrated device Technical Field The invention relates to the technical field of energy-saving wastewater treatment equipment, in particular to a high-salinity wastewater multi-effect evaporation and salinity recovery integrated device. Background The direct discharge of high-salt wastewater generated in industrial production can cause serious pollution to the ecological environment, and along with the popularization of the stricter environmental protection policy and the zero discharge requirement, the advanced treatment of the high-salt wastewater and the realization of the crystallization recovery of salt are becoming the industry's right need; among the numerous treatment technologies, the evaporation method is widely used because of its capability of effectively separating water and solutes, in particular, the multiple effect evaporation technology, which reduces the energy consumption of the conventional single effect evaporation to a certain extent by using the latent heat of the secondary steam multiple times; however, the prior multi-effect evaporation technology still faces a significant bottleneck in practical application, the conventional multi-effect evaporation system generally takes high-quality steam of a boiler as a sole heat source, steam consumption is still huge, so that the operation cost of wastewater treatment is high, and the economic problem for restricting the large-scale industrial application of the system is solved, in order to reduce the operation cost, the industry begins to explore and utilize waste heat resources generated in the industrial production process, for example, the scheme of preheating desulfurization wastewater by utilizing waste heat of tail flue gas of the boiler is recorded in the published patent literature, or a mode of coupling a flue gas heater and an evaporator is utilized, the prior art often has the limitation of single heat utilization form, or high-temperature flue gas is only used as a supplementary heat source for low-level utilization, the heat energy value of the high-temperature flue gas is not fully exerted, or the operation fluctuation of the flue gas heat source is large, a large amount of steam is still needed as a bottom heat source, so that the whole energy utilization efficiency is not fundamentally improved, in addition, the high-salt waste water is extremely easy to precipitate salt crystals on the surface of a heat exchange tube bundle when the high-salt waste water is evaporated and concentrated to a supersaturated state, the scaling is not only greatly reduced, the heat exchange efficiency is greatly reduced, the equipment cleaning frequency and maintenance cost is increased, therefore, how to integrate and utilize low-grade heat energy and high-grade heat energy to the greatest extent in the process of high-efficiency evaporation and crystallization of high-salt wastewater, effectively solve the scaling problem in the evaporation process, realize real energy saving and stable operation, meet the equipment upgrading requirement of the environment-friendly industry, and be a technical problem to be solved urgently by those skilled in the art. Disclosure of Invention Aiming at the defects and shortcomings of the prior art, the invention provides a multi-effect evaporation and salt recovery integrated device for high-salt wastewater, which aims at the existing problems, synthesizes energy-saving and environment-friendly requirements, selects a multi-effect evaporation scheme, combines and utilizes a high-grade heat source and a low-grade heat source to realize multi-position heating of the high-salt wastewater, realizes full utilization of energy, reduces pollution discharge, simultaneously and efficiently heats and crystallizes the wastewater and recovers and processes crystallized salt, thereby achieving efficient, energy-saving and environment-friendly utilization of heat energy and recovery and post-treatment utilization of salt in the wastewater. In order to achieve the above purpose, the present invention adopts the following technical scheme: The crystallization device comprises a plurality of crystallization kettles which are arranged from left to right, a plurality of heating kettles which are arranged in a one-to-one correspondence with the crystallization kettles, a heating mechanism which is arranged in the heating kettles, a crystallization mechanism which is arranged in the crystallization kettles, and a recovery mechanism which is arranged below the crystallization kettles. The heating mechanism comprises a plurality of heating coils, a heating fixing seat, a heating air inlet valve and a pressure regulating air outlet valve, wherein the heating coils are arranged in a heating kettle in a group from top to bottom, the heating fixing seat is arranged on a side plate of the heating kettle in a penetrating manner, the inlet end and the outlet end of the