CN110844957A - Desulfurization wastewater zero-discharge method with efficiently adjustable working condition - Google Patents
Desulfurization wastewater zero-discharge method with efficiently adjustable working condition Download PDFInfo
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- CN110844957A CN110844957A CN201911188138.8A CN201911188138A CN110844957A CN 110844957 A CN110844957 A CN 110844957A CN 201911188138 A CN201911188138 A CN 201911188138A CN 110844957 A CN110844957 A CN 110844957A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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Abstract
The invention relates to a desulfurization wastewater zero-discharge method with efficiently adjustable working conditions. The invention adopts a process flow that a high-temperature section desulfurization waste water flue injection device, a middle-temperature section desulfurization waste water flue injection device, a low-temperature section desulfurization waste water flue injection device, a desulfurization waste water inlet pipeline and a controller are sequentially arranged along the direction of boiler flue gas. The device has strong adaptability and adjustability to the desulfurization wastewater with different physicochemical properties, has high evaporation efficiency of the desulfurization wastewater, low operation cost and convenient maintenance and operation, can effectively solve the problems of scaling and blockage of the flue injection device of the desulfurization wastewater, and is suitable for zero emission of the desulfurization wastewater with variable desulfurization working conditions.
Description
Technical Field
The invention relates to a desulfurization wastewater zero-discharge method with efficiently adjustable working conditions, in particular to a desulfurization wastewater zero-discharge method with efficiently adjustable working conditions, which consists of a high-temperature desulfurization wastewater flue injection device, a middle-temperature desulfurization wastewater flue injection device, a low-temperature desulfurization wastewater flue injection device, a desulfurization wastewater inlet pipeline and a controller.
Background
The flue gas desulfurization method of the coal-fired power plant in China mostly adopts a wet limestone-gypsum method, and the process application proportion reaches more than 85 percent. With the increasing development of environmental protection work in China, the problem of safe discharge of desulfurization wastewater generated by a wet desulfurization process is urgently needed to be solved. The desulfurization wastewater contains various pollutants due to the complexity of coal components, the pollution characteristics are outstanding, and the desulfurization wastewater cannot be randomly and disorderly discharged due to the particularity of the physicochemical properties of the desulfurization wastewater and must be subjected to safe and reliable harmless treatment. The zero discharge process of the desulfurization waste water gradually becomes the leading hot spot of the current basic research and technical development.
According to the characteristics and the mechanism that the desulfurization waste water with different physicochemical properties has different evaporation characteristics, the invention adopts the high-efficiency desulfurization waste water zero discharge method with adjustable working conditions, so that the desulfurization waste water with different physicochemical properties can be respectively treated with the most efficient harmless treatment, and the process adaptability and the adjustability are strong.
Disclosure of Invention
The invention aims to provide a desulfurization wastewater zero discharge method with efficiently adjustable working condition, which adopts a desulfurization wastewater zero discharge method that a high-temperature section desulfurization wastewater flue injection device, a middle-temperature section desulfurization wastewater flue injection device and a low-temperature section desulfurization wastewater flue injection device are sequentially arranged in a flue along the flue gas direction of a boiler, and the working condition that the high-temperature section desulfurization wastewater flue injection device, the middle-temperature section desulfurization wastewater flue injection device and the low-temperature section desulfurization wastewater flue injection device are respectively connected with a pretreated desulfurization wastewater storage tank through a desulfurization wastewater inlet pipeline and a controller can be efficiently adjusted. The device has strong adaptability and adjustability to the desulfurization wastewater with different physicochemical properties, has high evaporation efficiency of the desulfurization wastewater, low operation cost and convenient maintenance and operation, can effectively solve the problems of scaling and blockage of the flue injection device of the desulfurization wastewater, and is suitable for zero emission of the desulfurization wastewater with variable desulfurization working conditions.
In order to achieve the aim, the high-temperature-section desulfurization waste water flue injection device is arranged in a flue with the flue gas temperature of 450-600 ℃, and the water inlet condition of the desulfurization waste water is as follows: the SS (suspended matter) value is 1200-2500mg/l, the TDS (total dissolved solids) value is less than 5000mg/l, the middle-temperature-section desulfurization waste water flue injection device is arranged in a flue with the flue gas temperature of 200-250 ℃, and the water inlet conditions of the desulfurization waste water are as follows: the SS (suspended matter) value is 2500-4000mg/l, the TDS (total dissolved solids) value is 5000-20000mg/l, the low-temperature-section desulfurization waste water flue injection device is arranged in a flue with the flue gas temperature of 150-200 ℃, and the water inlet conditions of the desulfurization waste water are as follows: the SS (suspended matter) value is more than 4000mg/l, and the TDS (total dissolved solids) value is more than 20000 mg/l. The desulfurization waste water with different physicochemical properties is controlled by the desulfurization waste water inlet pipeline controller to respectively enter the high-temperature section desulfurization waste water flue injection device, the middle-temperature section desulfurization waste water flue injection device and the low-temperature section desulfurization waste water flue injection device, the highest evaporation efficiency is respectively achieved, the problems of scaling and blockage of the flue injection devices are effectively solved, and the desulfurization waste water with different physicochemical properties has stronger adaptability and is easy to operate and maintain.
When the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: the SS (suspended solid) value is 1200 and 2500mg/l, the TDS (total dissolved solids) value is less than 5000mg/l, the high-temperature-section desulfurization wastewater inlet pipeline controller arranged on the high-temperature-section desulfurization wastewater inlet pipeline for providing desulfurization wastewater for the high-temperature-section desulfurization wastewater flue injection device is automatically opened, the desulfurization wastewater in the pretreated desulfurization wastewater storage tank enters the high-temperature-section desulfurization wastewater flue injection device through the high-temperature-section desulfurization wastewater inlet pipeline, and then the desulfurization wastewater is injected into the flue to carry out evaporation treatment on the desulfurization wastewater.
When the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: SS (suspended solid) value is 2500 additionally 4000mg/l, TDS (total dissolved solids) value is 5000 additionally 20000mg/l, the middle temperature section desulfurization waste water inlet pipeline controller that sets up on the middle temperature section desulfurization waste water inlet pipeline that provides desulfurization waste water for middle temperature section desulfurization waste water flue injection apparatus automatically opens, simultaneously, the high temperature section desulfurization waste water inlet pipeline controller that sets up on the high temperature section desulfurization waste water inlet pipeline that provides desulfurization waste water for high temperature section desulfurization waste water flue injection apparatus automatically closes, desulfurization waste water in the desulfurization waste water storage tank through preliminary treatment gets into middle temperature section desulfurization waste water flue injection apparatus through middle temperature section desulfurization waste water inlet pipeline, later spout the flue and carry out evaporation treatment to desulfurization waste water.
When the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: the SS (suspended matter) value is more than 4000mg/l, the TDS (total dissolved solids) value is more than 20000mg/l, a low-temperature-section desulfurization waste water inlet pipeline controller arranged on a low-temperature-section desulfurization waste water inlet pipeline for providing desulfurization waste water for a low-temperature-section desulfurization waste water flue injection device is automatically started, simultaneously, the high-temperature section desulfurization waste water inlet pipeline controller arranged on the high-temperature section desulfurization waste water inlet pipeline for providing desulfurization waste water for the high-temperature section desulfurization waste water flue injection device and the medium-temperature section desulfurization waste water inlet pipeline controller arranged on the medium-temperature section desulfurization waste water inlet pipeline for providing desulfurization waste water for the medium-temperature section desulfurization waste water flue injection device are both automatically closed, desulfurization waste water in the pretreated desulfurization waste water storage tank enters the low-temperature section desulfurization waste water flue injection device through the low-temperature section desulfurization waste water inlet pipeline, and then is injected into the flue to carry out evaporation treatment on the desulfurization waste water.
Compared with the prior art, the invention has the following characteristics:
(1) according to the difference of the physicochemical properties of the desulfurization waste water, different flue gas flue injection devices are respectively arranged in different flue gas temperature sections, the evaporation efficiency of the desulfurization waste water is high, and the working condition is flexibly adjusted.
(2) The method is suitable for the actual situation of variable flue gas wet desulphurization working conditions in China, and has strong load adaptability.
(3) Can effectively solve the problems of scaling and blockage of the desulfurization waste water flue injection device.
(4) The invention has the characteristics of convenient maintenance and operation, etc.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic process flow diagram of the present invention.
In the figure: 1. the device comprises a high-temperature section desulfurization waste water flue injection device, a medium-temperature section desulfurization waste water flue injection device, a 3-low-temperature section desulfurization waste water flue injection device, a 4-high-temperature section desulfurization waste water inlet pipeline, a 5-medium-temperature section desulfurization waste water inlet pipeline, a 6-low-temperature section desulfurization waste water inlet pipeline, a 7-high-temperature section desulfurization waste water inlet pipeline controller, a 8-medium-temperature section desulfurization waste water inlet pipeline controller, a 9-low-temperature section desulfurization waste water inlet pipeline controller and a 10-pretreated desulfurization waste water storage tank.
Detailed Description
In figure 1, high-temperature section desulfurization waste water flue injection device (1) is set gradually along the boiler flue gas direction, middle-temperature section desulfurization waste water flue injection device (2), low-temperature section desulfurization waste water flue injection device (3), high-temperature section desulfurization waste water flue injection device (1) links to each other with desulfurization waste water storage tank (10) through high-temperature section desulfurization waste water inlet pipe (4), middle-temperature section desulfurization waste water flue injection device (2) links to each other with desulfurization waste water storage tank (10) through pretreatment through middle-temperature section desulfurization waste water inlet pipe (5), low-temperature section desulfurization waste water flue injection device (3) links to each other with desulfurization waste water storage tank (10) through pretreatment through low-temperature section desulfurization waste water inlet pipe (6). The high-temperature section desulfurization waste water inlet pipeline (4) is provided with a high-temperature section desulfurization waste water inlet pipeline controller (7), the medium-temperature section desulfurization waste water inlet pipeline (5) is provided with a medium-temperature section desulfurization waste water inlet pipeline controller (8), and the low-temperature section desulfurization waste water inlet pipeline (6) is provided with a low-temperature section desulfurization waste water inlet pipeline controller (9).
When the desulfurization waste water in the pretreated desulfurization waste water storage tank (10) reaches the following water inlet conditions: SS (suspended solid) value is 1200 ability 2500mg/l, TDS (total dissolved solids) value is < 5000mg/l, high temperature section desulfurization waste water inlet pipe controller (7) of setting on high temperature section desulfurization waste water inlet pipe (4) that provides desulfurization waste water for high temperature section desulfurization waste water flue injection apparatus (1) open automatically, desulfurization waste water in desulfurization waste water storage tank (10) through the preliminary treatment gets into high temperature section desulfurization waste water flue injection apparatus (1) through high temperature section desulfurization waste water inlet pipe (7), later spout the flue and carry out evaporation treatment to desulfurization waste water.
When the desulfurization waste water in the pretreated desulfurization waste water storage tank (10) reaches the following water inlet conditions: SS (suspended solid) value is 2500 additionally and 4000mg/l, TDS (total dissolved solids) value is 5000 additionally and 20000mg/l, medium temperature section desulfurization waste water inlet pipeline controller (8) of setting on medium temperature section desulfurization waste water inlet pipeline (5) for providing desulfurization waste water for medium temperature section desulfurization waste water flue injection apparatus (2) is automatic to be opened, simultaneously, high temperature section desulfurization waste water inlet pipeline controller (7) of setting on high temperature section desulfurization waste water inlet pipeline (4) for providing desulfurization waste water for high temperature section desulfurization waste water flue injection apparatus (1) is automatic to be closed, desulfurization waste water in desulfurization waste water storage tank (10) through preliminary treatment gets into medium temperature section desulfurization waste water flue injection apparatus (2) through medium temperature section desulfurization waste water inlet pipeline (5), later spout the flue and carry out evaporation treatment to desulfurization waste water.
When the desulfurization waste water in the pretreated desulfurization waste water storage tank (10) reaches the following water inlet conditions: SS (suspended solid) value is more than 4000mg/l, TDS (total dissolved solids) value is more than 20000mg/l, a low-temperature-section desulfurization wastewater inlet pipeline controller (9) arranged on a low-temperature-section desulfurization wastewater inlet pipeline (6) for providing desulfurization wastewater for a low-temperature-section desulfurization wastewater flue injection device (3) is automatically opened, meanwhile, a high-temperature-section desulfurization wastewater inlet pipeline controller (7) arranged on a high-temperature-section desulfurization wastewater inlet pipeline (4) for providing desulfurization wastewater for a high-temperature-section desulfurization wastewater flue injection device (1) and a medium-temperature-section desulfurization wastewater inlet pipeline controller (8) arranged on a medium-temperature-section desulfurization wastewater inlet pipeline (5) for providing desulfurization wastewater for a medium-temperature-section desulfurization wastewater flue injection device (2) are both automatically closed, and desulfurization wastewater in a pretreated desulfurization wastewater storage tank (10) enters the low-temperature-section desulfurization wastewater flue injection device (3) through the low-temperature-section desulfurization wastewater inlet pipeline (6), then spraying the mixture into a flue to evaporate the desulfurization wastewater.
The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the art should be included in the scope of the present invention.
Claims (4)
1. The utility model provides a desulfurization waste water zero release method that operating mode can high-efficiently be adjusted, wherein desulfurization waste water zero release device that operating mode can high-efficiently be adjusted mainly comprises high temperature section desulfurization waste water flue injection apparatus, middle temperature section desulfurization waste water flue injection apparatus, low temperature section desulfurization waste water flue injection apparatus, desulfurization waste water inlet pipe way and controller, its characterized in that: the high-temperature section desulfurization waste water flue injection device, the middle-temperature section desulfurization waste water flue injection device and the low-temperature section desulfurization waste water flue injection device are sequentially arranged along the direction of the flue gas of the boiler.
2. The desulfurization waste water zero-discharge method capable of efficiently adjusting working conditions according to claim 1, characterized in that: when the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: the SS value is 1200 and 2500mg/l, the TDS value is less than 5000mg/l, a high-temperature-section desulfurization wastewater inlet pipeline controller arranged on a high-temperature-section desulfurization wastewater inlet pipeline for providing desulfurization wastewater for a high-temperature-section desulfurization wastewater flue injection device is automatically started, desulfurization wastewater in a pretreated desulfurization wastewater storage tank enters the high-temperature-section desulfurization wastewater flue injection device through the high-temperature-section desulfurization wastewater inlet pipeline, and then is injected into a flue to evaporate the desulfurization wastewater.
3. The desulfurization waste water zero-discharge method capable of efficiently adjusting working conditions according to claim 1, characterized in that: when the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: the SS value is 2500 additionally and 4000mg/l, the TDS value is 5000 additionally and 20000mg/l, the middle-temperature-section desulfurization wastewater inlet pipeline controller arranged on the middle-temperature-section desulfurization wastewater inlet pipeline for providing desulfurization wastewater for the middle-temperature-section desulfurization wastewater flue injection device is automatically opened, and simultaneously, the high-temperature-section desulfurization wastewater inlet pipeline controller arranged on the high-temperature-section desulfurization wastewater inlet pipeline for providing desulfurization wastewater for the high-temperature-section desulfurization wastewater flue injection device is automatically closed, the desulfurization wastewater in the pretreated desulfurization wastewater storage tank enters the middle-temperature-section desulfurization wastewater flue injection device through the middle-temperature-section desulfurization wastewater inlet pipeline, and then the desulfurization wastewater is injected into the flue to be evaporated.
4. The desulfurization waste water zero-discharge method capable of efficiently adjusting working conditions according to claim 1, characterized in that: when the desulfurization wastewater in the pretreated desulfurization wastewater storage tank reaches the following water inlet conditions: the SS value is > 4000mg/l, the TDS value is > 20000mg/l, the low temperature section desulfurization waste water inlet pipeline controller that sets up on the low temperature section desulfurization waste water inlet pipeline that provides desulfurization waste water for low temperature section desulfurization waste water flue injection apparatus opens automatically, simultaneously, the high temperature section desulfurization waste water inlet pipeline controller that sets up on the high temperature section desulfurization waste water inlet pipeline that provides desulfurization waste water for high temperature section desulfurization waste water flue injection apparatus and the middle temperature section desulfurization waste water inlet pipeline controller that sets up on the middle temperature section desulfurization waste water inlet pipeline that provides desulfurization waste water for middle temperature section desulfurization waste water flue injection apparatus all self-closing, desulfurization waste water in the desulfurization waste water storage tank through the preliminary treatment gets into low temperature section desulfurization waste water flue injection apparatus through low temperature section desulfurization waste water inlet pipeline, later spout the flue and carry out evaporation treatment to desulfurization waste water.
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Cited By (1)
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| CN114477335A (en) * | 2022-01-25 | 2022-05-13 | 山东国舜建设集团有限公司 | Desulfurization wastewater evaporation and concentration zero-emission system and process based on double circulation loops |
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| CN110844957B (en) | 2023-06-30 |
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