LU505777B1

LU505777B1 - Desulfurization wastewater treatment system

Info

Publication number: LU505777B1
Application number: LU505777A
Authority: LU
Inventors: Xiaohui Zhang; Xinyu Wang
Original assignee: Inner Mongolia Helin Power Generation Co Ltd
Priority date: 2023-11-24
Filing date: 2023-12-13
Publication date: 2024-06-13
Also published as: CN117602757A

Abstract

The present invention relates to the technical field of desulfurization wastewater treatment. The invention provides a desulfurization wastewater treatment system comprising a baseplate, an indirect air cooling tower, a wastewater evaporation system, and a water distribution system. The indirect air cooling tower is fixedly installed on the baseplate, and the wastewater evaporation system is installed on the internal baseplate of the indirect air cooling tower, with the wastewater evaporation system connected to the water distribution system. The wastewater evaporation system includes a circulating wastewater pool fixedly installed at the top of which is an evaporation tower body. Inside the evaporation tower body, there are installations such as a wastewater evaporation device, a water collector, and fan blades. Additionally, a concentrated wastewater treatment device is located at the right end of the baseplate. In the present invention, desulfurization wastewater undergoes intensified evaporation reduction technology inside the indirect air cooling tower, effectively evaporating the water content in the wastewater and reducing the wastewater discharge.

Description

Desulfurization Wastewater Treatment System

Technical Field

The present invention relates to the technical field of desulfurization wastewater treatment, specifically to a desulfurization wastewater treatment system.

Background Technology

With the increasingly stringent environmental protection policies, the challenges of difficult desulfurization wastewater treatment and high treatment costs have become common issues faced by power plants. Currently, conventional processes for desulfurization wastewater concentration and reduction include membrane concentration reduction processes, flue gas waste heat concentration reduction processes, low-temperature multi-effect concentration reduction processes, and the like.

The waste heat concentration reduction process (e.g., Patent: CN109052534A) utilizing a large amount of high-temperature flue gas waste heat requires substantial energy consumption. There is a universal demand in power plants to explore a new desulfurization wastewater reduction process that is low in investment, low in operating costs, and reliable in operation, thereby achieving the internal absorption of desulfurization wastewater without discharge to meet environmental requirements.

This invention provides an efficient and economical desulfurization wastewater treatment technology demonstration for indirect air-cooled units within the factory.

Summary of the Invention

The present invention provides a desulfurization wastewater treatment system to address the technical problems mentioned in the background technology.

To solve the above technical problems, the present invention discloses a desulfurization wastewater treatment system comprising a baseplate, an indirect air 10908777 cooling tower, a wastewater evaporation system, and a water distribution system. The indirect air cooling tower is fixedly installed on the baseplate, and the internal baseplate of the indirect air cooling tower is equipped with a wastewater evaporation system, which is connected to the water distribution system.

Preferably, the wastewater evaporation system includes: a circulating wastewater pool. The circulating wastewater pool is fixedly installed at the center of the baseplate, and the top of the circulating wastewater pool is fixedly installed with an evaporation tower body. The bottom of the evaporation tower body is provided with an air inlet, and the top of the evaporation tower body is fixedly connected to an air duct. The bottom of the air duct is fixedly connected to the first support, and the first support is rotatably connected to fan blades. The top of the fan blades is fixedly connected to first pulley, and the fan blades are driven to rotate by a driving device.

Preferably, a water collector is located below the fan blades. The water collector is fixedly connected to the inner wall of the evaporation tower body, and below the water collector, the inner wall of the evaporation tower body is fixedly connected to the second support. The second support is rotatably connected to a vertical pipe, and the top of the vertical pipe is rotatably connected to an inlet pipe. The bottom of the vertical pipe is fixedly connected to a transverse pipe, and several nozzles are distributed on the transverse pipe. The vertical pipe is driven to rotate by a driving device. The bottom of the second support is provided with a wastewater evaporation device, which is fixedly connected to the inner wall of the evaporation tower body.

Preferably, the driving device includes: a rotating motor. The rotating motor is fixedly installed on the outer wall of the air duct, and the output shaft of the rotating motor is connected to the first vertical axis. The first vertical axis is rotatably connected to a bearing bracket, and the bearing bracket is fixedly connected to the outer wall of the evaporation tower body. The top of the first vertical axis is fixedly connected to second pulley. First pulley and second 10908777 pulley are connected by first belt. The vertical pipe is fixedly connected to third pulley, and the bottom of the first vertical axis is connected to fourth pulley. Third pulley is connected to fourth pulley by second belt.

Preferably, the water distribution system includes: a wastewater inlet pipe. The top of the wastewater inlet pipe is fixedly connected to the left top of the circulating wastewater pool, and the left bottom of the circulating wastewater pool is connected to first supply pipe. The top of first supply pipe is connected to the inlet pipe, and first supply pipe is equipped with first circulating pump on top. The left and right ends of first circulating pump are connected to first loop pipe.

Second circulating pump is installed on first loop pipe. The inlet pipe is used to supply water to the wastewater evaporation system.

Preferably, the right bottom of the circulating wastewater pool is connected to the outlet pipe. Third circulating pump is installed on the outlet pipe. The left and right ends of third circulating pump are connected to second loop pipe. Second circulating pump is fixedly connected to second loop pipe. The outlet pipe is connected to a reuse system.

Preferably, a concentrated wastewater treatment device is also provided, including second wastewater tank, support frame, mixing barrel, feeding mixing mechanism, switch mechanism, and solid-liquid separation mechanism. The top of the baseplate is fixedly installed with second wastewater tank, and the bottom of second wastewater tank is fixedly connected to a drainage pipe. The top of second wastewater tank is fixedly installed with a support frame, and the top of the support frame is fixedly connected to a mixing barrel. The top of the mixing barrel is equipped with a feeding mixing mechanism, and the bottom of the mixing barrel is equipped with a switch mechanism. The bottom of the mixing barrel is equipped with a solid-liquid separation mechanism.

Preferably, the feeding mixing mechanism includes: a mixing motor. The top center of the mixing barrel is fixedly installed with a mixing motor, and the output shaft of the mixing motor is fixedly connected to a rotating rod. The rotating rod passes through the top of the mixing barrel, and the bottom of the rotating rod is fixedly connected to several stirring rods. The top of the rotating rod is fixedly installed with a feeding disk, and the feeding disk is slidably connected to the top inside the mixing barrel. The feeding disk is distributed with a circle of feeding holes away from the center, and the mixing motor is symmetrically fixedly connected to the left and right first and second feeding hoppers. The bottom of the first and second feeding hoppers is fixedly connected to the mixing barrel, and the bottom opening of the first and second feeding hoppers corresponds to the feeding hole position. The left end of the mixing barrel is fixedly connected to a water inlet.

Preferably, the switch mechanism includes: a discharge outlet. The center of the bottom wall of the mixing barrel is provided with a discharge outlet, and the discharge outlet is provided with a sealing cover above it.

Preferably, the solid-liquid separation mechanism includes: a filter pipe. The filter pipe is fixedly connected below the discharge outlet, and symmetrical horizontal baffles are fixedly connected to the left and right inner walls of the filter pipe. A sliding filter plate is slidably connected to the bottom left of the filter pipe. The center of the filter plate is fixedly connected to a filter screen. Below the filter screen, a collection port is opened at the top of the wastewater tank. The left end of the filter plate is fixedly connected to second horizontal rod, and the right end of the filter plate is fixedly connected to third horizontal rod. The right end of third horizontal rod is fixedly connected to a push plate. Between the push plate and the wall of the filter pipe, the outer sleeve of third horizontal rod is equipped with first spring. The right end of the baffle is tightly against a cam, and the rear end of the cam is fixedly connected to the output shaft of a driving motor, which is fixedly connected to the top of second wastewater tank. 17905777

Beneficial effects of the invention: the present invention employs enhanced evaporation and reduction technology within an air-cooled tower for desulfurization 5 wastewater, effectively evaporating the water content in the wastewater to reduce the discharge volume. Simultaneously, the technology utilizes the heat and gas flow in the wastewater to achieve energy recovery, improving energy utilization efficiency.

Additionally, the technology boasts advantages such as a simple structure, convenient operation, and low investment costs. When compared to traditional methods, the enhanced evaporation and reduction technology for desulfurization wastewater within an air-cooled tower exhibits significant technical and economic advantages. In contrast to widely used flue gas waste heat concentration reduction technology, the initial investment can be reduced by over 30%, and operating costs can be decreased by over 50%. Furthermore, this process system is simple, equipment is safe and reliable, and waste heat within the air-cooled tower is effectively utilized, resulting in excellent energy-saving effects. Compared to conventional desulfurization wastewater treatment processes both domestically and abroad, this technology demonstrates significant technical and economic advantages.

The following detailed description of the technical solution of the present invention is further illustrated through accompanying drawings and embodiments.

Description of the Drawings

The drawings are provided to facilitate a further understanding of the present invention and constitute a part of the specification. The drawings, together with embodiments of the present invention, are used to explain the present invention and do not constitute limitations on the present invention. In the drawings:

FIG.1 is a front view of the desulfurization wastewater treatment system device of the present invention;

FIG.2 is an enlarged partial view of area A in FIG.1;

FIG.3 is a front view of the concentrated wastewater treatment device of the 17508777 present invention;

FIG.4 is an enlarged partial view of area B in FIG.3.

In the figures: 1, baseplate; 2, indirect air cooling tower; 3, wastewater evaporation system; 4, evaporation tower body; 5, circulating wastewater pool; 6, air inlet; 7, air duct; 8, first support; 9, fan blades; 10, first pulley; 11, rotating motor; 12, first vertical axis; 13, second pulley; 14, first belt; 15, water collector; 16, wastewater evaporation device; 17, second support; 18, vertical pipe; 19, inlet pipe; 20, transverse pipe; 21, nozzle; 22, third pulley; 23, fourth pulley; 24, second belt; 25, bearing bracket; 26, wastewater inlet pipe; 27, first supply pipe; 28, first circulating pump; 29, first loop pipe; 30, second circulating pump; 31, outlet pipe; 32, third circulating pump; 33, second loop pipe; 34, fourth circulating pump; 35, reuse system; 36, concentrated wastewater treatment device; 37, second wastewater tank; 38, support frame; 39, — mixing barrel; 40, driving motor; 41, drainage pipe; 42, mixing motor; 43, rotating rod; 44, stirring rod; 45, feeding disk; 46, cam; 47, feeding hole; 48, first feeding hopper; 49, second feeding hopper; 50, water inlet; 51, discharge outlet; 52, sealing cover; 53, first vertical rod; 54, first roller; 55, transmission chamber; 56, first horizontal rod; 57, first wedge slider; 58, horizontal plate; 59, baffle; 60, rotating rod; 61, push plate; 62, filter plate; 63, filter pipe; 64, filter screen; 65, second horizontal rod; 66, swinging rod; 67, third horizontal rod; 68, first spring; 69, collection port.

Specific Embodiments

The following presents preferred embodiments of the present invention, illustrated in conjunction with the accompanying drawings. It should be understood that these embodiments are provided for explanatory purposes and do not intend to limit the scope of the invention.

Additionally, in the present invention, descriptions such as those involving "first", "second", etc., are used for descriptive purposes only, and are not meant to refer to a particular order or sequence, nor are they intended to qualify the present invention, 10908777 but are merely for the purpose of distinguishing between components or operations described in the same technical terminology. It is not to be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Accordingly, a feature defined as "first" or "second" may include at least one such feature, either explicitly or implicitly. In addition, the technical solutions and technical features of the various embodiments may be combined with each other, but only on the basis that they are achievable by a person of ordinary skill in the art, and when the combination of technical solutions appears to be contradictory or unachievable, it should be assumed that the combination of such technical solutions does not exist, and is not within the scope of protection of the claims of the present invention.

The following, in conjunction with the accompanying drawings, provides further detailed descriptions of the technical solutions of the present invention.

Embodiment 1

The present embodiment provides a desulfurization wastewater treatment system, as shown in FIGs. 1-2, comprising: a baseplate 1, an indirect air cooling tower 2, a wastewater evaporation system 3, and a water distribution system. The indirect air cooling tower 2 is fixedly installed on the baseplate 1, and the wastewater evaporation system 3 is installed on the inside of the indirect air cooling tower 2 on the baseplate 1. The wastewater evaporation system 3 is connected to the water distribution system.

The water distribution system includes: a wastewater inlet pipe 26. The left top of the circulating wastewater pool 5 is fixedly connected to the wastewater inlet pipe 26. The left bottom of the circulating wastewater pool 5 is connected to first supply pipe 27. The top of first supply pipe 27 is connected to the water inlet pipe 19. A first

. . 22 . . . . LU505777 circulating pump 28 is installed on first supply pipe 27. The left and right ends of first circulating pump 28 are connected to first loop pipe 29. Second circulating pump 30 is installed on first loop pipe 29. The water inlet pipe 19 is used to supply water to the wastewater evaporation system 3.

The right bottom of the circulating wastewater pool 5 is connected to the outlet pipe 31. Third circulating pump 32 is installed on the outlet pipe 31. The left and right ends of third circulating pump 32 are connected to second loop pipe 33. Second circulating pump 30 is fixedly installed on second loop pipe 33. The outlet pipe 31 is connected to the reuse system 35.

Table 1. Comparison Table of Domestic Power Plant Desulfurization Wastewater

Concentration and Reduction Technologies

Utilization of Flue Gas| Low-Temperature | This Technology and

Membrane ; c tra d Waste Heat Multi-Effect Innovation Indirect air ; oncentration an

Comparison Item Concentration and Concentration and ;

Reduction cooling tower Waste

Reduction Reduction

Heat Concentration

Two-stage Wastewater tank > Wastewater Three-unit

Process Flow softening Concentration tower | regulation tank > pretreatment + pretreatment + > Slurry tank > Slurry] Low-temperature Desulfurization filtration + pump > Wastewater multi-effect wastewater membrane receiving point concentration system | evaporation tower concentration — Wastewater discharge pump >

Wastewater receiving point 1) The water quality |1) The concentration |1) Adopting multi- 1) The water quality requirements for the [heat source utilizes [effect flash requirements for the incoming water are {the boiler to handle [evaporation inflow are low, and broad, and the the dust-laden flue technology to achieve [simple pretreatment is ystem exhibits gas at the end, hierarchical energy performed to reduce trong adaptability to|eliminating the need utilization. suspended solids, uctuations in water [for other heat ensuring that the quality. sources. subsequent filling is not clogged.

; Ni ; LU505777 2) The system is 2) Utilizing direct 2) Utilizing the residual 2) Utilizing the residual modularized, with ; heat from the indirect contact heat exchange|heat from the tail flue imple installation air-cooled tower, which between flue gas and [of the boiler as a heat |. . . and a short is considered entirely debugging time. desulfurization source, the entire waste heat, without wastewater without |evaporation and affecting the overall heat transfer concentration process [thermal efficiency of . the plant. components, thereby |operates without avoiding corrosion external steam input and scaling issues under normal caused by heat conditions, and transfer. additional heat sources are required only under special conditions.

Characteristics 8) The reclaimed 3) Using the residual |3) There is no need for ater has good ; heat from the tail flue |pretreatment of quality. to evaporate and desulfurization concentrate wastewater. Gypsum desulfurization solid particles in the wastewater, achieving|desulfurization both waste heat wastewater are used utilization and as crystal nuclei, reducing the avoiding the temperature of flue |nucleation and growth gas entering the of calcium sulfate on desulfurization the heat exchange system, thereby surface and ensuring lowering water that the evaporation consumption in the [system remains free of desulfurization scaling. system. 4) High requirements or operational control level. 1) The process is 1) The system has . . ) P ) y 1) Simple, reliable, and simple, and there is [strong adaptability to ; _ |easy to operate and no need for changes in the quality wastewater pre- of desulfurization maintain. treatment equipment |wastewater, and there

; ; LU505777 investment or is no need for chemical investment in pre- consumption. treatment equipment.

System Advantages |After membrane 2) Utilizing the 2) The condensed 2) Low investment and residual heat from the|water generated b . reatment, the ; 8 | y operating costs. astewater can tail-end of the flue gas|the system's steam achieves both the can be recycled for extract some fresh utilization of waste secondary use, ater for secondary Lg . heat and the significantly reducing use, effectively reduction of the flue |power plant water reducing the water |gas temperature consumption and consumption of the [entering the improving water power plant and desulfurization resource utilization. enhancing the system, thereby

Ce lowering the water utilization of water consumption of the resources. a. desulfurization system. 3) Throughout the 3)Can be constructed in winter, with no concentration process, impact on the desulfurization operation of other wastewater does not [systems during directly contact the construction. flue gas or the desulfurization system, avoiding any impact on the desulfurization system.

Operation and Can achieve Can achieve Can achieve Can achieve automated

Contro automated program [automated program program control, as automated program control, with control and the goal of well as the goal of ; ; control, but the ; relatively complex Junmanned operation. unattended operation. ystem control. system control is relatively complex.

Maintenance he membrane he equipment layout |Equipment types are [Minimal, with only

Workload ystem has higher [is decentralized, diverse, and the periodic observations requirements for leading to a large installation of the flue of the fill material operation and inspection workload. |gas heat exchanger in

P P 8 8 needed. maintenance, and However, the system [the flue poses a risk of operators need structure is relatively |ash accumulation, pecialized training. |simple, and the resulting in a relatively equipment higher maintenance maintenance workload.

The technical solution's operational principle and beneficial effects are as follows:

Desulfurization wastewater is introduced into the circulating wastewater pool 5 through the wastewater inlet pipe 26. Through the operation of first circulating pump 28 and second circulating pump 30, desulfurization wastewater flows through first supply pipe 27 and water inlet pipe 19 into the indirect air cooling tower. Within the tower, a wastewater evaporation device 16 is set up, containing a packing layer that increases the contact surface area between wastewater and air. Wastewater forms a thin film flow within the packing layer, undergoing heat and mass transfer with the air, gradually evaporating the water content. The water vapor produced is carried away by the airflow and condensed into liquid water through the water collector 15, achieving water recovery.

Water Distribution System: Its purpose is to ensure that within a certain range of water volume changes, water is evenly distributed over the entire surface of the wastewater evaporation device 16 to fully utilize the device for water evaporation.

Wastewater Circulating Pumps First circulating pump 28, Second circulating pump 30,

Third circulating pump 32, Fourth circulating pump 34: Mainly used for the circulation and reduction of wastewater, allowing wastewater to circulate into the evaporation tower for reduction. Circulating Wastewater Pool 5: Used for the recovery of evaporated wastewater, located at the bottom of the evaporation tower body 4, also serving as a storage and water volume adjustment.

The principle of the desulfurization wastewater entering the indirect air cooling tower 2 for evaporation reduction is to utilize the high-temperature, low-humidity air within the power plant's indirect air cooling tower 2 for heat and mass transfer with desulfurization wastewater inside the desulfurization wastewater evaporation tower body 4. This achieves the efficient evaporation of desulfurization wastewater. 10908777

Compared to the external environment, the air-cooling tower remains in a state of high temperature and low humidity throughout the year (ambient temperature 20°C-65C, relative humidity 10%-30%), providing favorable conditions for evaporation.

By comparing Table 1, it is evident that the enhanced evaporation reduction technology applied to desulfurization wastewater in the indirect air cooling tower 2 can effectively evaporate the water content in wastewater, thereby reducing the discharge of wastewater. Simultaneously, this technology leverages the heat and gas flow within wastewater to achieve energy recovery, improving energy utilization efficiency. Additionally, the technology boasts advantages such as a simple structure, easy operation, and low investment costs. When compared to traditional technological solutions, the desulfurization wastewater enhanced evaporation reduction technology demonstrates significant technical and economic advantages. In contrast to the widely adopted flue gas waste heat concentration reduction technology, the initial investment can be reduced by more than 30%, and operating costs can be decreased by over 50%.

Moreover, this process system is straightforward, equipment is safe and reliable, and it effectively utilizes waste heat within the air-cooling tower, resulting in notable energy-saving effects. In comparison with conventional domestic and international desulfurization wastewater treatment processes, this technology presents apparent technical and economic superiority.

Embodiment 2

Building upon Embodiment 1, as shown in FIGs. 1 and 2, the wastewater evaporation system 3 includes: a circulating wastewater pool 5. The central part of the baseplate 1 firmly installs the circulating wastewater pool 5, with the top of the circulating wastewater pool 5 fixedly connected to the evaporation tower body 4. The bottom of the evaporation tower body 4 is equipped with an air inlet 6. The top of the evaporation tower body 4 is fixedly connected to the air duct 7, with the bottom of the air duct 7 fixedly connected to first support 8. First support 8 is rotationally connected to fan blades 9, and the top of the fan blades 9 is axially fixedly connected to first pulley 10908777 10. The fan blades 9 are rotationally driven by a drive device.

Beneath the fan blades 9, a water collector 15 is positioned, fixedly connected to theinner wall of the evaporation tower body 4. Below the water collector 15, the inner wall of the evaporation tower body 4 is fixedly connected to second support 17, and second support 17 is rotationally connected to the vertical pipe 18. The top of the vertical pipe 18 is rotationally connected to the water inlet pipe 19, and the bottom of the vertical pipe 18 is fixedly connected to the transverse pipe 20. Several nozzles 21 are distributed on the transverse pipe 20. The vertical pipe 18 is rotationally driven by a drive device. Below second support 17, a wastewater evaporation device 16 is positioned, fixedly connected to the inner wall of the evaporation tower body 4. The water inlet pipe 19 passes through the outer wall of the evaporation tower body 4 and is rotationally connected to the top of the vertical pipe 18.

The drive device includes: rotating motor 11: fixedly installed on the outer wall of the air duct 7. the output shaft of the rotating motor 11 is connected to the first vertical axis 12,and first vertical axis 12: rotationally connected to the bearing bracket 25, which is fixedly connected to the outer wall of the evaporation tower body 4, first vertical axis 12 has a second pulley 13 fixedly connected to its top. First pulley 10 and second pulley 13 are connected by first belt 14,and vertical pipe 18 is fixedly connected to third pulley 22. First vertical axis 12 has fourth pulley 23 fixedly connected to its bottom, third pulley 22 and fourth pulley 23 are connected by second belt 24.

The operational principle of the above technical solution is as follows: When the evaporation system is in operation, the circulating wastewater pool 5 circulates desulfurization wastewater through the water inlet pipe 19 into the vertical pipe 18 via the water distribution system. At this time, the rotating motor 11 operates, driving the first vertical axis 12, second pulley 13, and fourth pulley 23 to rotate synchronously.

Fourth pulley 23 utilizes second belt 24 to make third pulley 22, the vertical rod, and 10908777 the horizontal rod rotate synchronously. Desulfurization wastewater inside the vertical pipe 18 and the horizontal rod is expelled through the nozzles 21 by water pressure and centrifugal force. It falls onto the wastewater evaporation device 16 inside the evaporation tower body 4, where the entering wastewater is separated into small water droplets or a thin water film. This maximizes the contact (time and space) between water and air, enhancing the evaporation effect. The wastewater evaporation device 16 can be made of different materials and shapes and arranged in different ways.

The evaporation tower body 4 adopts a square structure, and its peripheral structure is manufactured from special anti-corrosion materials. The evaporation tower body 4 undergoes partial water evaporation through the wastewater evaporation device 16, reducing the overall volume of wastewater. Second pulley 13 rotates, making first pulley 10 and fan blades 9 rotate. This creates an upward airflow within the air duct 7, causing the evaporated water to move upward into the water collector 15. After condensation, it forms liquid water, which is then recycled, reducing the waste of evaporated water.

The heat exchange between wastewater and air within the evaporation tower body 4 is primarily accomplished through the ventilation equipment. Depending on factors such as wastewater volume, wastewater concentration, air dry-bulb temperature, and relative humidity, the airflow and air pressure are determined within the evaporation tower body 4. The rotating motor is often a closed-type motor, and measures are taken to seal and moisture-proof its wiring terminals.

Water Collector 15: the purpose of the water collector 15 is to prevent water droplets carried by the upward-flowing air from being discharged from the evaporation tower body 4. This helps reduce the water loss caused by the humid air expelled from the evaporation tower body 4 and minimizes the environmental impact.

The beneficial effects of the above technical solution are as follows: The desulfurization wastewater evaporation system 3 utilizes the high-temperature, low- 10908777 humidity air in the indirect air cooling tower 2 to reduce the treatment cost of desulfurization wastewater evaporation. The fan blades 9 within the evaporation tower body 4 continuously draw in high-temperature, low-humidity air through the air inlet 6. This effectively utilizes the waste heat in the high-temperature, low-humidity air of the indirect air cooling tower 2, enhancing evaporation efficiency and the rate of concentrated wastewater formation. It ensures the processing rate. The synchronous rotation of the fan blades 9, the vertical pipe 18, and the transverse pipe 20 by the rotating motor 11 enlarges the range of desulfurization wastewater spraying, ensuring even distribution on the wastewater evaporation device 16.

Embodiment 3

Building upon Embodiment 2, as shown in FIGs. 3 and 4, the concentrated wastewater treatment device 36 includes: a second wastewater tank 37, support frame 38, mixing barrel 39, feeding and mixing mechanism, switch mechanism, and solid-liquid separation mechanism. The top end of the baseplate 1 firmly installs the second wastewater tank 37. The bottom of the second wastewater tank 37 is fixedly connected to the drainage pipe 41. The top of the second wastewater tank 37 is fixedly connected to the support frame 38. The top of the support frame 38 is fixedly connected to the mixing barrel 39. The mixing barrel 39 has a feeding and mixing mechanism at the top and an switch mechanism at the bottom. The mixing barrel 39 also has a solid-liquid separation mechanism at the bottom.

The feeding and mixing mechanism includes: mixing motor 42: fixedly installed at the central top of the mixing barrel 39. The output shaft of the mixing motor 42 is fixedly connected to the rotating rod 43, which rotates through the central top of the mixing barrel 39, several stirring rods 44 are fixedly connected to the bottom of the rotating rod 43. The feeding disk 45 is fixedly installed at the top of the rotating rod 43, and it is internally slidably connected to the top of the mixing barrel 39. The feeding disk 45 has a circle of feeding holes 47 distributed away from the center,and the mixing motor 42 symmetrically fixedly connects the first feeding hopper 48 and the second 10908777 feeding hopper 49 on the left and right. The bottom of the first feeding hopper 48 and the second feeding hopper 49 is fixedly connected to the mixing barrel 39, the bottom openings of the first feeding hopper 48 and the second feeding hopper 49 correspond tothe positions of the feeding holes 47. The left end of the top of the mixing barrel 39 is fixedly connected to the water inlet 50.

The switch mechanism includes: discharge outlet 51: The center of the bottom wall of the mixing barrel 39 has a discharge outlet 51, above the discharge outlet 51, there is a sealing cover 52.

The bottom of the sealing cover 52 symmetrically fixedly connects the first vertical rod 53, which slides up and down through the bottom wall of the mixing barrel 39. The left side of the bottom of the first vertical rod 53 is rotationally connected to the first roller 54, which is positioned in the transmission chamber 55. Inside the transmission chamber 55, there is a first horizontal rod 56 slidingly connected to the left end and fixedly connected to the right end. Near the discharge outlet 51, the left-high and right- low first wedge slider 57 is fixedly connected to the left end of the first horizontal rod 56. The inclined surface of the first wedge slider 57 presses against the first roller 54, and the left outer wall of the bottom of the mixing barrel 39 is fixedly connected to the horizontal plate 58. The outer end of the horizontal plate 58 is rotationally connected to the top of the rotating rod 60, and the bottom of the rotating rod 60 is slidably hinged to the first horizontal rod 56.

The solid-liquid separation mechanism includes a filter pipe 63, which is fixedly connected below the discharge outlet 51. The filter pipe 63 has symmetrical horizontal baffles 59 fixedly connected to its inner walls on the left and right sides. At the bottom of the filter pipe 63, there is a filter plate 62 slidably connected on the left rear side.

The center of the filter plate 62 is fixedly connected to the filter screen 64. Below the filter screen 64, there is a collection port 69 opened at the top of the wastewater tank.

The left end of the filter plate 62 is fixedly connected to second horizontal rod 65. 10908777

Second horizontal rod 65 is pivotally connected to swinging rod 66, and the top of the swinging rod 66 is fixedly connected to the bottom of the left side of the rotating rod 60. The right end of the filter plate 62 is fixedly connected to third horizontal rod 67, and the right end of third horizontal rod 67 is fixedly connected to push plate 61.

Between push plate 61 and the segment of third horizontal rod 67 against the wall of the filter pipe 63, there is a first spring 68. The right end of the baffle 59 is pressed against cam 46, and the rear end of cam 46 is fixedly connected to the output shaft of driving motor 40, which is fixedly connected to the top of second wastewater tank 37.

The working principle of the above technical solution is as follows: When desulfurization wastewater enters the indirect air cooling tower for enhanced evaporation and reduction, it effectively evaporates the water in the wastewater, thereby reducing the discharge of wastewater and eventually forming concentrated wastewater. After the concentrated wastewater enters the reuse system 35 and is introduced into the water inlet 50 through the pipeline, the concentrated wastewater treatment device 36 starts working. In the first feeding hopper 48 and the second feeding hopper 49 of the concentrated wastewater, a certain amount of reagent capable of neutralizing the concentrated wastewater substance is added. For example, adding lime for neutralization reaction or alum for precipitation. The mixing motor 42 drives the rotating rod 43, stirring rods 44, and feeding disk 45 to rotate synchronously.

The rotation speed of the mixing motor 42 controls the feeding amount in the same time period. The feeding amount can also be changed by replacing the feeding disk 45 or changing the size of the feeding holes 47. Through the mixed reaction of concentrated wastewater with lime and alum, and the generation of flocculent precipitate, the switch mechanism operates. The driving motor 40 rotates the cam 46, which presses against the push plate 61 and third horizontal rod 67 through the first spring 68. This causes the push plate 61 and third horizontal rod 67 to slide to the right, further driving the filter plate 62 and second horizontal rod 65 to slide to the right synchronously. Second horizontal rod 65 drives the swinging rod 66, and the rotating rod 60 on the left side rotates counterclockwise around the horizontal plate 58. The 10908777 rotating rod 60 drives first horizontal rod 56 to slide into the transmission chamber 55, pushing the first wedge slider 57 to tighten the first roller 54, first vertical rod 53, and sealing cover 52 upward. The sealing cover 52 opens the discharge outlet 51. After the reaction, the concentrated wastewater flows into the filter pipe 63 through the discharge outlet 51. The driving motor 40 causes the filter plate 62 to reciprocate left and right, effectively filtering out solid particles from the neutralized and reacted concentrated wastewater. Finally, the filtered wastewater flows into second wastewater tank 37 through the collection port 69. When needed, it can be discharged for use through the drainage valve.

The beneficial effect of the above technical solution is to further neutralize and precipitate the concentrated wastewater through the concentrated wastewater treatment device 36, reducing the corrosiveness of acidic substances in the concentrated wastewater for subsequent use, making it more environmentally friendly.

The feeding and mixing mechanism not only adds reaction reagents but also achieves thorough mixing, effectively shortening the neutralization reaction time. The driving motor 40 simultaneously controls the switch mechanism and the solid-liquid separation mechanism, improving energy utilization efficiency. The continuous opening and closing of the switch mechanism, in coordination with the filter screen 64 in the solid-liquid separation mechanism, can control the volume of concentrated wastewater rushing into the filter pipe 63, allowing for more thorough filtration of solid particles.

Clearly, those skilled in the art can make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims and their equivalent technologies, the present invention is intended to include these modifications and variations.

Claims

1. A desulfurization wastewater treatment system, wherein comprising a baseplate (1), an indirect air cooling tower (2), a wastewater evaporation system (3), and a water distribution system. The indirect air cooling tower (2) is fixedly installed on the baseplate (1), and the wastewater evaporation system (3) is installed on the internal baseplate (1) of the indirect air cooling tower (2), with the wastewater evaporation system (3) connected to the water distribution system.

2. The desulfurization wastewater treatment system according to claim 1, wherein the wastewater evaporation system (3) comprises a circulating wastewater pool (5) fixedly installed at the center of the baseplate (1). The circulating wastewater pool (5) is fixedly connected to the top of the evaporation tower body (4), The bottom of the evaporation tower body (4) is provided with an air inlet (6), and the top of the evaporation tower body (4) is fixedly connected to an air duct (7). A first support (8) at the air duct (7) bottom connects to a fan blade (9) driven to rotate by a driving device. A pulley (10) is fixedly connected to the top end of the fan blade (9).

3. The desulfurization wastewater treatment system according to claim 2, wherein the water collector (15) positioned below the fan blade (9). The water collector (15) is fixedly connected to the inner wall of the evaporation tower body (4), and below it, the inner wall of the evaporation tower body (4) is fixedly connected to a second support (17), which is rotationally connected to a vertical pipe (18). The bottom of the vertical pipe (18) is fixedly connected to a transverse pipe (20), equipped with several nozzles (21) on top. The vertical pipe (18) is driven to rotate by a driving device. Below the second support (17), there is a wastewater evaporation device (16) fixedly connected to the inner wall of the evaporation tower body (4).

4. The desulfurization wastewater treatment system according to claim 3, wherein the driving device comprises:

a rotating motor (11) fixedly installed on the outer wall of the air duct (7). The LUs0s777 output shaft of the rotating motor (11) is connected to a first vertical axis (12). First vertical axis (12) is rotationally connected to a bearing bracket (25), which is fixedly connected to the outer wall of the evaporation tower body (4). First vertical axis (12) is fixedly connected to a second pulley (13) at the top. First pulley (10) is connected to second pulley (13) by a first belt (14), and a third pulley (22) is fixedly connected to the top of the vertical pipe (18). The bottom of first vertical axis (12) is connected to fourth pulley (23). Third pulley (22) is connected to fourth pulley (23) by second belt (24).

5. The desulfurization wastewater treatment system according to claim 1, wherein further comprising a water distribution system, including a wastewater inlet pipe (26). The wastewater inlet pipe (26) is fixedly connected to the left top of the circulating wastewater pool (5). The left bottom of the circulating wastewater pool (5) is connected to a water first supply pipe (27), which is connected at the top to the water inlet pipe (19). Water first supply pipe (27) is equipped with a first circulating pump (28) at the top. First circulating pump (28) connects to first loop pipe (29) on both ends. First loop pipe (29) is equipped with a second circulating pump (30) at the top. The water inlet pipe (19) is used to supply water to the wastewater evaporation system (3).

6. The desulfurization wastewater treatment system according to claim 5, wherein the right bottom of the circulating wastewater pool (5) is connected to an outlet pipe (31). The outlet pipe (31) is equipped with a third circulating pump (32) at the top. Third circulating pump (32) connects to second loop pipe (33) on both ends. Second loop pipe (33) is fixedly equipped with second circulating pump (30). The outlet pipe (31) connects to a reuse system (35).

7. The desulfurization wastewater treatment system according to claim 1, wherein further comprising a concentrated wastewater treatment device (36), comprises a second wastewater tank (37), a support frame (38), a mixing barrel (39),

a feeding mixing mechanism, a switch mechanism, and a solid-liquid separation 10908777 mechanism. The top end of the baseplate (1) is fixedly connected to the second wastewater tank (37). The bottom of second wastewater tank (37) is fixedly connected to a drainage pipe (41). The top end of second wastewater tank (37) is fixedly connected to a support frame (38). The top of the support frame (38) is fixedly connected to the mixing barrel (39), which is equipped with a feeding mixing mechanism at the top, a switch mechanism at the bottom, and a solid-liquid separation mechanism at the bottom.

8. The desulfurization wastewater treatment system according to claim 7, wherein the feeding mixing mechanism comprises a mixing motor (42) fixedly installed at the top center of the mixing barrel (39). The output shaft of the mixing motor (42) is fixedly connected to a rotating rod (43). The rotating rod (43) rotates through the top of the mixing barrel (39) and is fixedly connected at the bottom to several stirring rods (44). The top of the rotating rod (43) is fixedly connected to a feeding disk (45), which slides inside the top of the mixing barrel (39). The feeding disk (45) has a ring of feeding holes (47) distributed away from the center. The mixing motor (42) is symmetrically fixedly connected to the first feeding hopper (48) and the second feeding hopper (49). The first feeding hopper (48) and the second feeding hopper (49) are fixedly connected at the bottom to the mixing barrel (39). The bottom openings of the first feeding hopper (48) and the second feeding hopper (49) correspond to the positions of the feeding holes (47). The left end of the top of the mixing barrel (39) is fixedly connected to a water inlet (50).

9. The desulfurization wastewater treatment system according to claim 7, wherein the switch mechanism comprises a discharge outlet (51) opened in the center of the bottom wall of the mixing barrel (39). The top of the discharge outlet (51) is equipped with a sealing cover (52).

10. The desulfurization wastewater treatment system according to claim 9,

wherein the solid-liquid separation mechanism comprises a filter pipe (63) fixedly 10908777 connected below the discharge outlet (51). The left and right inner walls of the filter pipe (63) are symmetrically fixedly connected to horizontal baffles (59). The left-rear of the bottom of the filter pipe (63) is slidably connected to a filter plate (62). The center of the filter plate (62) is fixedly connected to a filter screen (64). Below the filter screen (64), the top of the wastewater tank has a collection port (69). The left end of the filter plate (62) is fixedly connected to a second horizontal rod (65), and the right end is fixedly connected to a third horizontal rod (67). The right end of the third horizontal rod (67) is fixedly connected to a push plate (61). The outer segment of the third horizontal rod (67) between the push plate (61) and the wall of the filter pipe (63) is sleeved with a first spring (68). The right end of the baffle (59) is tightly pressed against a cam (46). The rear end of the cam (46) is fixedly connected to the output shaft of a driving motor (40), which is fixedly connected to the top of the second wastewater tank (37).