WO2023173448A1

WO2023173448A1 - Boiler flue gas evaporation device for high-concentration wastewater at power plant

Info

Publication number: WO2023173448A1
Application number: PCT/CN2022/081998
Authority: WO
Inventors: 张立军; 曾四鸣; 刘克成; 牛向楠; 王颖楠; 宫云茜
Original assignee: 国网河北省电力有限公司电力科学研究院; 国家电网有限公司; 国网河北能源技术服务有限公司
Priority date: 2022-03-17
Filing date: 2022-03-21
Publication date: 2023-09-21
Also published as: CN114873670A

Abstract

The present invention relates to the technical field of flue gas evaporation. Disclosed is a boiler flue gas evaporation device for high-concentration wastewater at a power plant. The boiler flue gas evaporation device comprises a base, above which an evaporation mechanism, a recovery mechanism, a treatment mechanism, a drain pipe, a wastewater injection pipe, a gas guide pipe and a wastewater flow guide pipe are provided; and four positioning bases are fixedly connected to an outer surface of the base. By means of the cooperative arrangement of the evaporation mechanism and the recovery mechanism in the boiler flue gas evaporation device, the evaporation rate can be effectively increased, and also, waste heat of evaporated wastewater is recycled, thereby effectively avoiding the wasting of waste heat of wastewater during evaporation of the wastewater by means of heating, effectively increasing the resource utilization rate, and thus avoiding resource waste.

Description

A power station highly concentrated wastewater boiler flue gas evaporation device

Technical field

The invention relates to the technical field of flue gas evaporation, specifically a flue gas evaporation device for highly concentrated wastewater boilers in power stations.

Background technique

A power station, also known as a power plant, is a factory that converts various primary energy sources contained in nature into electrical energy. At the end of the 19th century, as the demand for electricity increased, people began to propose the idea of establishing an electric power production center. With the development of motor manufacturing technology, the expansion of the application range of electric energy, and the rapid growth of the demand for electricity in production, power plants have emerged. There are many ways to generate electricity: those that rely on thermal power are called thermal power plants, and those that rely on hydropower are called thermal power plants. Hydropower plants, as well as some power plants that rely on solar, wind and tidal power, etc. Nuclear power plants that use nuclear fuel as energy have played an increasing role in many countries around the world. When the power plants are operating normally, there will be highly concentrated wastewater. Therefore, people need to evaporate flue gas from this highly concentrated wastewater to meet people's needs.

China Utility Model Publication No. CN205773870 U discloses a coal-fired boiler wastewater concentration and reduction flue gas evaporation device, which includes a coal-fired boiler, a preheating flue, a bypass flue and a main dust collector; it also includes a vibrating membrane concentrator, a storage tank Pool, and desulfurization absorption tower; the preheating flue is equipped with a main atomizing nozzle I connected with the vibrating membrane concentrator.

and main atomizing nozzle II. The preheating flue is provided with a main air preheater located between the main atomizing nozzle I and the main atomizing nozzle II. The main atomizing nozzle is located between the coal-fired boiler and the main air preheater. . The clean water discharged from the vibrating membrane concentrator can be recycled, effectively reducing the amount of wastewater that needs to be processed, effectively improving the treatment efficiency and reducing the treatment cost; the pollutants in the wastewater are completely evaporated and crystallized into dry ash, and the dry ash can be used as raw material for production Other industrial products; the water in the concentrated wastewater is evaporated into water vapor and discharged into the desulfurization absorption tower for treatment; thus the wastewater is completely separated and processed, and no pollutants will be discharged and will not pollute the surrounding environment.

Chinese invention patent publication number CN113104917A discloses an automatic spray evaporation system for the main flue of a desulfurization wastewater boiler, which includes a compressed air supply system, a desulfurization wastewater supply system, an atomization spray gun, a PLC controller, a front-end temperature sensor and a back-end temperature sensor. The compressed air supply system includes compressed air tanks, pressure reducing valves, pressure stabilizing tanks, electric valves and air flow meters connected in series through gas pipelines. Desulfurization wastewater supply

The system includes wastewater tanks, wastewater pumps, one-way valves, filters, wastewater headers, solenoid valves and liquid flow meters that are connected in series through water delivery pipes. The invention can adjust the desulfurization wastewater injection amount of the atomizing nozzle in real time according to the boiler load and the flue gas temperature changes at the front and rear ends of the flue, and can detect the desulfurization wastewater injection amount according to the corresponding sensor

The data adjusts actuators such as valves and pumps of the compressed air supply system and desulfurization wastewater supply system in real time to achieve a matching balance between the desulfurization wastewater flow rate and the compressed air flow rate, as well as a balance between changes in boiler load and flue temperature and the evaporation of the desulfurization wastewater.

In existing flue gas evaporation devices, people often evaporate highly concentrated wastewater by heating it. However, if the wastewater is simply heated for evaporation, the evaporation effect will be unsatisfactory and the evaporation efficiency will be relatively slow. The use of heating to evaporate will cause the waste heat in the concentrated wastewater to not be recycled, and resources cannot be effectively utilized, resulting in a waste of resources and inconvenience for people to use. For this reason, we provide a power station highly concentrated wastewater boiler flue gas evaporation device Solve the above problems.

technical problem

The purpose of the present invention is to make up for the shortcomings of the existing technology and provide a flue gas evaporation device for a highly concentrated wastewater boiler in a power station.

Technical solutions

In order to achieve the above object, the present invention provides the following technical solution: a power station highly concentrated wastewater boiler flue gas evaporation device, including a base, an evaporation mechanism is provided above the base, and a recovery mechanism is provided above the base. A treatment mechanism is provided above the base, a drainage pipe is provided above the base, a wastewater injection pipe is provided above the base, an air guide pipe is provided above the base, and a wastewater guide pipe is provided above the base, Four positioning seats are fixedly connected to the outer surface of the base.

Further, the evaporation mechanism includes an evaporation boiler, the evaporation boiler is connected with the wastewater injection pipe, a motor is installed on the upper surface of the evaporation boiler, and a stirring shaft is fixedly connected to the output end of the motor.

Further, a support plate 1 is installed on the inner wall of the evaporation boiler. A heating component is installed on the upper surface of the support plate 1. A support plate 2 is fixedly connected to the outer surface of the evaporation boiler. The bottom surface of the support plate 2 is fixed. Four support legs are connected, and the bottom ends of the four support legs are fixedly connected to the upper surface of the base.

Further, the recovery mechanism includes an insulating box, the insulating box is connected to a drainage pipe, an exhaust pump is connected to the upper surface of the insulating box, and an exhaust pipe is connected to the upper surface of the exhaust pump.

Further, the inner wall of the insulating box is fixedly connected with a heat insulation board, and a heat exchange conduit is installed inside the insulating box.

Further, the processing mechanism includes a processing box, an exhaust pipe is connected to the outer surface of the processing box, and a bracket is fixedly connected to the inner wall of the exhaust pipe.

Further, an exhaust fan is installed on the outer surface of the bracket, an odor elimination plate is installed on the inner wall of the exhaust tube, and two T-shaped frames are fixedly connected to the bottom surface of the treatment box. The bottom surfaces are all fixedly connected to the upper surface of the base.

beneficial effects

Compared with existing technology, the power station’s highly concentrated wastewater boiler flue gas evaporation device has the following beneficial effects:

Through the cooperation between the evaporation mechanism and the recovery mechanism, the present invention can effectively increase the evaporation rate, and at the same time recycle the waste heat contained in the evaporated wastewater, thereby effectively avoiding the need for people to heat the wastewater. The waste heat in the wastewater is wasted during evaporation, which effectively improves the utilization rate of resources, avoids waste of resources, and facilitates people's use.

The present invention can effectively recover the waste heat of the evaporated wastewater through the cooperation between the insulating box, the heat exchange conduit, the wastewater diversion pipe, the exhaust pump and the exhaust pipe. After the concentrated wastewater is evaporated, The wastewater is discharged into the heat exchange tube through the wastewater diversion pipe. The heat in the wastewater will be released into the insulation box under the action of the heat exchange tube. The heat insulation board can effectively insulate it and reduce the loss of heat. , and then by starting the exhaust pump, the hot air is supplied to people's daily life through the exhaust pipe, effectively improving resource utilization.

Description of the drawings

Figure 1 is a schematic front view of the three-dimensional structure of the present invention;

Figure 2 is a schematic side view of the three-dimensional structure of the present invention;

Figure 3 is a schematic three-dimensional structural diagram of the evaporation mechanism of the present invention;

Figure 4 is a partial structural schematic diagram of the recycling mechanism of the present invention;

Figure 5 is a partial structural schematic diagram of the processing mechanism of the present invention.

In the picture: 1. Base; 2. Evaporation mechanism; 201. Evaporation boiler; 202. Motor; 203. Stirring shaft; 204. Support plate one; 205. Heating component; 206. Support plate two; 207. Support legs; 3. Recycling mechanism; 301. Insulation box; 302. Exhaust pump; 303. Exhaust pipe; 304. Heat shield; 305. Heat exchange pipe; 4. Processing mechanism; 401. Processing box; 402. Exhaust tube; 403. Bracket ; 404. Exhaust fan; 405. Odor elimination plate; 406. T-shaped frame; 5. Drainage pipe; 6. Wastewater injection pipe; 7. Air guide pipe; 8. Wastewater guide pipe; 9. Positioning seat.

Embodiments of the invention

The principles and features of the present invention are described below with reference to the accompanying drawings. The examples cited are only used to explain the present invention and are not intended to limit the scope of the present invention.

This embodiment provides a power station highly concentrated wastewater boiler flue gas evaporation device. Through the cooperation between the evaporation mechanism 2 and the recovery mechanism 3, the device can effectively increase the evaporation rate, and at the same time, it can effectively improve the evaporation rate of the wastewater after evaporation. The waste heat contained in the waste water can be recycled and utilized, thus effectively avoiding the waste of waste heat caused by people using heating to evaporate waste water, effectively improving the utilization rate of resources, avoiding waste of resources, and making it convenient for people to use.

Example 1

Referring to Figures 1 to 5, a power station highly concentrated wastewater boiler flue gas evaporation device includes a base 1. An evaporation mechanism 2 is provided above the base 1. The evaporation mechanism 2 includes an evaporation boiler 201, and the evaporation boiler 201 is connected to the wastewater injection pipe 6 Pass, the motor 202 is installed on the upper surface of the evaporation boiler 201. The output end of the motor 202 is rotationally connected to the upper surface of the evaporation boiler 201, and the output end of the motor 202 extends to the inside of the evaporation boiler 201. The output end of the motor 202 is fixedly connected to Stirring shaft 203. The outer surface of the stirring shaft 203 is provided with round rods arranged at equal distances. Through the rotation of the stirring shaft 203, the wastewater is stirred under the action of the round rods to improve the evaporation efficiency.

A support plate 204 is installed on the inner wall of the evaporation boiler 201. A heating assembly 205 is installed on the upper surface of the support plate 204. The heating assembly 205 can heat the wastewater and evaporate the wastewater. The outer surface of the evaporation boiler 201 The second support plate 206 is fixedly connected to the bottom surface of the second support plate 206 with four support legs 207 . The bottom ends of the four support legs 207 are all fixedly connected to the upper surface of the base 1 .

Example 2

Compared with Example 1, on the basis of Example 1,

A recovery mechanism 3 is provided above the base 1. The recovery mechanism 3 includes an insulating box 301. The insulating box 301 is connected to the drainage pipe 5. The upper surface of the insulating box 301 is connected to an exhaust pump 302. The upper surface of the exhaust pump 302 is connected to an exhaust gas. Pipe 303, the inner wall of the insulating box 301 is fixedly connected with a heat insulation plate 304, a heat exchange conduit 305 is installed inside the insulating box 301, the drainage pipe 5 is connected with the heat exchange conduit 305 inside the insulating box 301, the heat exchange conduit 305 belongs to the existing With technology, the heat contained in the wastewater can be released through the heat exchange conduit 305 and stored in the insulation box 301.

Example 3

Compared with Example 2, on the basis of Example 2,

A processing mechanism 4 is provided above the base 1. The processing mechanism 4 includes a processing box 401. The processing box 401 belongs to the existing technology. The evaporated flue gas can be processed through the processing box 401 and then discharged into the atmosphere to avoid pollution. The outer surface of the treatment box 401 is connected to an exhaust pipe 402. The inner wall of the exhaust pipe 402 is fixedly connected with a bracket 403. An exhaust fan 404 is installed on the outer surface of the bracket 403. An odor elimination plate is installed on the inner wall of the exhaust pipe 402. 405. There are two T-shaped frames 406 fixedly connected to the bottom surface of the processing box 401. The bottom surfaces of the two T-shaped frames 406 are fixedly connected to the upper surface of the base 1. The power of the exhaust fan 404 is adjustable. When the evaporated smoke comes out, When there is a lot of air, it can be removed more quickly by increasing the power of the exhaust fan 404, and the odor contained in the exhaust gas can be effectively removed by setting up a T-shaped frame 406.

A drainage pipe 5 is provided above the base 1. The drainage pipe 5 is connected with the insulation box 301. A wastewater injection pipe 6 is provided above the base 1. Wastewater is injected into the evaporation boiler 201 through the wastewater injection pipe 6. A guide is provided above the base 1. Air pipe 7, one end of the air guide pipe 7 is connected to the evaporation boiler 201, and the other end is connected to the treatment box 401. A wastewater diversion pipe 8 is provided above the base 1, and one end of the wastewater diversion pipe 8 is connected to the bottom of the evaporation boiler 201. The other end is connected with the heat exchange pipe 305, and four positioning seats 9 are fixedly connected to the outer surface of the base 1.

Working principle: When using the device, the staff first positions and fixes the device through the positioning seat 9, then injects the highly concentrated wastewater in the power station into the evaporation boiler 201 through the wastewater injection pipe 6, and then opens the heating assembly 205 to allow it to evaporate. The wastewater in the evaporation boiler 201 is heated, and the starting motor 202 drives the stirring shaft 203. The rotation of the stirring shaft 203 can effectively improve the evaporation efficiency of the wastewater, and the flue gas generated by the evaporation is discharged into the treatment box 401 through the air guide 7 , after the flue gas is treated in the treatment box 401, the staff can discharge the flue gas by starting the exhaust fan 404, and then discharge the evaporated wastewater into the heat exchange conduit 305 through the wastewater diversion pipe 8, and the heat in the wastewater Under the action of the heat exchange pipe 305, it will be released into the insulating box 301. The heat insulation board 304 can effectively insulate it and reduce the loss of heat. Then, the exhaust pump 302 is started to supply the hot gas through the exhaust pipe 303. In people's daily life, it effectively improves resource utilization and makes it convenient for people to use.

The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within the range.

Claims

A power station highly concentrated wastewater boiler flue gas evaporation device, including a base (1), characterized in that: an evaporation mechanism (2) is provided above the base (1), and a recovery mechanism is provided above the base (1) (3), a treatment mechanism (4) is provided above the base (1), a drainage pipe (5) is provided above the base (1), and a wastewater injection pipe (5) is provided above the base (1). 6), an air guide pipe (7) is provided above the base (1), a waste water guide pipe (8) is provided above the base (1), and there are four fixedly connected outer surfaces of the base (1). A positioning seat (9).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 1, characterized in that: the evaporation mechanism (2) includes an evaporation boiler (201), and the evaporation boiler (201) and the wastewater injection pipe (6 ) are connected, a motor (202) is installed on the upper surface of the evaporation boiler (201), and a stirring shaft (203) is fixedly connected to the output end of the motor (202).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 2, characterized in that: a support plate (204) is installed on the inner wall of the evaporation boiler (201), and the support plate (204) A heating component (205) is installed on the upper surface, a second support plate (206) is fixedly connected to the outer surface of the evaporation boiler (201), and four support legs (207) are fixedly connected to the bottom surface of the second support plate (206). , the bottom ends of the four supporting legs (207) are fixedly connected to the upper surface of the base (1).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 1, characterized in that: the recovery mechanism (3) includes an insulating box (301), and the insulating box (301) and the drainage pipe (5) The upper surface of the insulating box (301) is connected to an exhaust pump (302), and the upper surface of the exhaust pump (302) is connected to an exhaust pipe (303).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 4, characterized in that: the inner wall of the insulation box (301) is fixedly connected with a heat insulation board (304), and the inner wall of the insulation box (301) is A heat exchange pipe (305) is installed inside.
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 1, characterized in that: the treatment mechanism (4) includes a treatment box (401), and the outer surface of the treatment box (401) is connected with a discharge Air cylinder (402), a bracket (403) is fixedly connected to the inner wall of the exhaust cylinder (402).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 6, characterized in that: an exhaust fan (404) is installed on the outer surface of the bracket (403).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 6, characterized in that: an odor elimination plate (405) is installed on the inner wall of the exhaust tube (402).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 6, characterized in that: two T-shaped frames (406) are fixedly connected to the bottom surface of the treatment box (401).
A power station highly concentrated wastewater boiler flue gas evaporation device according to claim 9, characterized in that: the bottom surfaces of the two T-shaped frames (406) are fixedly connected to the upper surface of the base (1).