CN111333149A - System for sharing and regenerating acid and alkali for condensate polishing and boiler feed water treatment - Google Patents
System for sharing and regenerating acid and alkali for condensate polishing and boiler feed water treatment Download PDFInfo
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- CN111333149A CN111333149A CN202010193284.6A CN202010193284A CN111333149A CN 111333149 A CN111333149 A CN 111333149A CN 202010193284 A CN202010193284 A CN 202010193284A CN 111333149 A CN111333149 A CN 111333149A
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention discloses a system for sharing regeneration acid and alkali with condensate polishing and boiler feedwater polishing, which comprises a demineralized water input pipeline, a regeneration water pump, a heating device, an alkali regeneration water flow regulating valve, an alkali ejector, an acid regeneration water flow regulating valve, an acid ejector, an alkali storage tank, an alkali metering box, a boiler feedwater alkali regeneration liquid outlet valve, a condensate polishing alkali regeneration liquid outlet valve, an acid storage tank, an acid metering box, a boiler feedwater acid regeneration liquid outlet valve and a condensate polishing acid regeneration liquid outlet valve.
Description
Technical Field
The invention belongs to the field of water treatment, and relates to a system for sharing and regenerating acid and alkali by condensate polishing and boiler feedwater treatment.
Background
The boiler feedwater treatment system of the power plant mainly has the function of preparing qualified desalted water through chemical desalting equipment, and a system of cation bed, anion bed and mixed bed or a system of RO, cation bed, anion bed and mixed bed is mostly adopted. The condensate polishing system is mainly used for purifying condensate formed by condensing steam so as to ensure the quality of boiler feed water, and generally comprises a preposed filtration and high-speed mixed bed or a positive bed and a negative bed system. The boiler water supply system and the condensate fine treatment system both utilize ion exchange resin to carry out desalination, and the cation resin and the anion resin need to be respectively regenerated by acid and alkali after the resin is invalid.
Although the boiler makeup water and the condensed water treatment are different in water quality and type of ion exchange resin used, the types of the regeneration liquid are completely consistent and the regeneration conditions are basically the same. However, according to the existing design specification DL 5068-2014, a boiler make-up water acid-base storage metering system and a condensate polishing acid-base storage metering system are required to be respectively constructed in a thermal power plant. Thus, not only is the investment and the occupied area large, but also the operation and management cost is increased. Therefore, considering the characteristics that acid and alkali regeneration is required for boiler make-up water and condensate fine treatment and the regeneration process is intermittent operation, it is necessary to optimize and share the acid and alkali metering systems, so that the occupied area is reduced, the engineering investment is reduced, and the operation management and maintenance are convenient.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a system for sharing acid and alkali for regeneration in condensate polishing and boiler feedwater treatment, which can realize that the same acid and alkali storage metering system is used for the regeneration of ion exchange resin of two systems of condensate and feedwater treatment.
In order to achieve the purpose, the system for sharing and regenerating acid and alkali by condensate polishing and boiler feed water treatment comprises a desalted water input pipeline, a regeneration water pump, a heating device, an alkali regeneration water flow regulating valve, an alkali ejector, an acid regeneration water flow regulating valve, an acid ejector, an alkali storage tank, an alkali metering box, a boiler feed water alkali regeneration liquid outlet valve, a condensate polishing alkali regeneration liquid outlet valve, an acid storage tank, an acid metering box, a boiler feed water acid regeneration liquid outlet valve and a condensate polishing acid regeneration liquid outlet valve;
the desalted water input pipeline is communicated with an inlet of a regeneration water pump, an outlet of the regeneration water pump is divided into two paths, one path is communicated with an inlet of an alkali ejector through a heating device and an alkali regeneration water flow regulating valve, the other path is communicated with an inlet of an acid ejector through an acid regeneration water flow regulating valve, an outlet of an alkali storage tank is communicated with an inlet of the alkali ejector through an alkali metering box, an outlet of the alkali ejector is communicated with an external water supply system through a boiler water supply alkali regeneration liquid outlet valve, and an outlet of the alkali ejector is communicated with an external fine treatment system through a condensed water fine treatment alkali regeneration liquid outlet valve;
the acid storage tank is communicated with an inlet of the acid ejector through the acid metering box, an outlet of the acid ejector is communicated with an external water supply system through a boiler water supply acid regenerated liquid outlet valve, and an outlet of the acid ejector is communicated with a fine treatment system through a condensate fine treatment acid regenerated liquid outlet valve.
An alkali regeneration water temperature sensor and an alkali regeneration water flow sensor are arranged on a pipeline between the heating device and the alkali regeneration water flow regulating valve.
An alkali feeding valve of the alkali metering box is arranged between the alkali storage tank and the alkali metering box, and an alkali feeding valve of the alkali injector is arranged between the alkali metering box and the alkali injector.
And an alkalinity meter is arranged at the outlet of the alkalinity injector.
And an acid regeneration water flow sensor is arranged on a pipeline between the outlet of the regeneration water pump and the acid regeneration water flow regulating valve.
An acid inlet valve of the acid metering tank is arranged between the acid storage tank and the acid metering tank, and an acid inlet valve of the acid ejector is arranged between the acid metering tank and the acid ejector.
An acidimeter is arranged at the outlet of the acid ejector.
The invention has the following beneficial effects:
the system for sharing regeneration acid and alkali for condensate polishing and boiler feedwater polishing is characterized in that regenerated water is mixed with alkali liquor to obtain alkali regenerated liquid, the regenerated water is mixed with acid liquor to obtain acid regenerated liquid, an alkali regenerated liquid meeting the regeneration requirement of a boiler feedwater system and an alkali regenerated liquid meeting the regeneration requirement of a polishing system are obtained by adjusting an alkali regenerated water flow regulating valve, and an acid regenerated liquid meeting the regeneration requirement of a polishing system and an acid regenerated liquid meeting the regeneration requirement of a boiler feedwater system are obtained by adjusting an acid regenerated water flow regulating valve, so that the same acid-alkali storage metering system is used for regenerating ion exchange resin of two sets of systems of condensate and feedwater polishing.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is an alkali metering box alkali inlet valve, 2 is an alkali regenerated water flow regulating valve, 3 is a boiler make-up water alkali regenerated liquid outlet valve, 4 is a condensed water refined alkali regenerated liquid outlet valve, 5 is an acid metering box acid inlet valve, 6 is an acid regenerated water flow regulating valve, 7 is a boiler make-up water acid regenerated liquid outlet valve, 8 is a condensed water refined acid regenerated liquid outlet valve, 9 is an alkali ejector alkali inlet valve, 10 is an acid ejector acid inlet valve, 11 is a regenerated water pump, 12 is a heating device, 13 is an alkali storage tank, 14 is an alkali measuring tank, 15 is an alkali ejector, 16 is an acid storage tank, 17 is an acid measuring tank, 18 is an acid ejector, 19 is a water supply system, 20 is a fine treatment system, 21 is a desalted water input pipeline, F1 is an alkali regeneration water flow sensor, F2 is an acid regeneration water flow sensor, TE is an alkali regeneration water temperature sensor, J is an alkalimeter, and S is an acidimeter.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the system for sharing regeneration acid and alkali between condensate polishing and boiler feed water treatment according to the present invention includes a desalted water input pipeline 21, a polishing water pump 11, a heating device 12, an alkali polishing water flow regulating valve 2, an alkali injector 15, an acid polishing water flow regulating valve 6, an acid injector 18, an alkali storage tank 13, an alkali metering tank 14, a boiler feed water alkali regeneration liquid outlet valve 3, a condensate polishing alkali regeneration liquid outlet valve 4, an acid storage tank 16, an acid metering tank 17, a boiler feed water acid regeneration liquid outlet valve 7, and a condensate polishing acid regeneration liquid outlet valve 8; the desalted water input pipeline 21 is communicated with the inlet of the regenerated water pump 11, the outlet of the regenerated water pump 11 is divided into two paths, wherein one path is communicated with the inlet of an alkali ejector 15 through a heating device 12 and an alkali regenerated water flow regulating valve 2, the other path is communicated with the inlet of an acid ejector 18 through an acid regenerated water flow regulating valve 6, the outlet of an alkali storage tank 13 is communicated with the inlet of the alkali ejector 15 through an alkali metering box 14, the outlet of the alkali ejector 15 is communicated with an external water supply system 19 through a boiler water supply alkali regenerated liquid outlet valve 3, and the outlet of the alkali ejector 15 is communicated with an external fine treatment system 20 through a condensed water fine treatment alkali regenerated liquid outlet valve 4; the acid storage tank 16 is communicated with the inlet of an acid ejector 18 through an acid metering box 17, the outlet of the acid ejector 18 is communicated with an external water supply system 19 through a boiler water supply acid regeneration liquid outlet valve 7, and the outlet of the acid ejector 18 is communicated with a fine treatment system 20 through a condensed water fine treatment acid regeneration liquid outlet valve 8.
Specifically, an alkali regeneration water temperature sensor TE and an alkali regeneration water flow sensor F1 are arranged on a pipeline between the heating device 12 and the alkali regeneration water flow regulating valve 2; an alkali metering box alkali inlet valve 1 is arranged between the alkali storage tank 13 and the alkali metering box 14, and an alkali injector alkali inlet valve 9 is arranged between the alkali metering box 14 and the alkali injector 15; an alkalinity meter J is arranged at the outlet of the alkalinity injector 15; an acid regeneration water flow sensor F2 is arranged on a pipeline between the outlet of the regeneration water pump 11 and the acid regeneration water flow regulating valve 6; an acid metering tank acid inlet valve 5 is arranged between the acid storage tank 16 and the acid metering tank 17, and an acid injector acid inlet valve 10 is arranged between the acid metering tank 17 and the acid injector 18; an acidimeter S is provided at the outlet of the acid ejector 18.
The specific working process of the invention is as follows:
1. when the make-up water ion exchange resin is invalid and needs to be regenerated, 1) when the anion resin of the make-up water system 19 is regenerated, starting the regeneration water pump 11, heating the demineralized water by the heating device 12, detecting the temperature of the heated demineralized water by the alkali regeneration water temperature sensor TE, interlocking the detected temperature with the heating device 12, enabling the temperature of the demineralized water output by the heating device 12 to be about 40 ℃, and enabling the heated regenerated water to enter the alkali ejector 15 through the alkali regeneration water flow regulating valve 2; the alkali liquor output by the alkali storage tank 13 enters the alkali metering box 14, then enters the alkali ejector 15 through the alkali ejector alkali inlet valve 9, the alkalinity of the alkali regenerated liquid sprayed by the alkali ejector 15 is detected through the alkalinity meter J, and the alkali regenerated liquid is linked with the alkali regenerated water flow regulating valve 2, so that the alkalinity of the alkali liquor output by the alkali ejector 15 meets the requirement, and the alkali regenerated liquid output by the alkali ejector 15 is sent into the water supply system 19.
2) When the cation resin in the water supply system 19 is regenerated, the regeneration water pump 11 is started, and the regeneration water enters the acid ejector 18 through the acid regeneration water flow regulating valve 6; acid liquor output by the acid storage tank 16 enters an acid metering tank 17 and then enters an acid ejector 18 through an acid ejector acid inlet valve 10, and an acidimeter S controls the opening of an acid regeneration water flow regulating valve 6 through a PLC (programmable logic controller) to obtain acid regeneration liquid meeting the regeneration requirement of a boiler make-up water system 19.
2. When the condensate polishing ion exchange resin fails and needs to be regenerated, the steps are basically similar to the steps, and the difference is that the opening degrees of the alkali regeneration water flow regulating valve 2 and the acid regeneration water flow regulating valve 6 are regulated through PLC automatic control, so that the acid regeneration liquid or the alkali regeneration liquid meeting the regeneration requirement of the polishing system 20 is obtained.
The invention is suitable for thermal power plants with various sizes and simultaneously provided with a condensate fine treatment system 20 and an ion exchange process boiler water supply system 19, and the units with different sizes can be provided with the number of storage tanks, metering boxes and ejectors according to the actual water quantity, and can be used for active units and newly-built units.
Claims (7)
1. A system for sharing regeneration acid and alkali with condensate polishing and boiler feed water treatment is characterized by comprising a demineralized water input pipeline (21), a regenerated water pump (11), a heating device (12), an alkali regeneration water flow regulating valve (2), an alkali ejector (15), an acid regenerated water flow regulating valve (6), an acid ejector (18), an alkali storage tank (13), an alkali metering tank (14), a boiler feed water alkali regenerated liquid outlet valve (3), a condensate polishing alkali regenerated liquid outlet valve (4), an acid storage tank (16), an acid metering tank (17), a boiler feed water acid regenerated liquid outlet valve (7) and a condensate polishing acid regenerated liquid outlet valve (8);
the desalted water input pipeline (21) is communicated with an inlet of a regenerated water pump (11), an outlet of the regenerated water pump (11) is divided into two paths, wherein one path is communicated with an inlet of an alkali ejector (15) through a heating device (12) and an alkali regeneration water flow regulating valve (2), the other path is communicated with an inlet of an acid ejector (18) through an acid regenerated water flow regulating valve (6), an outlet of an alkali storage tank (13) is communicated with an inlet of the alkali ejector (15) through an alkali metering box (14), an outlet of the alkali ejector (15) is communicated with an external water supply system (19) through a boiler water supply alkali regenerated liquid outlet valve (3), and an outlet of the alkali ejector (15) is communicated with an external fine treatment system (20) through a condensed water fine treatment alkali regenerated liquid outlet valve (4);
an acid storage tank (16) is communicated with an inlet of an acid ejector (18) through an acid metering box (17), an outlet of the acid ejector (18) is communicated with an external water supply system (19) through a boiler water supply regenerated liquid outlet valve (7), and an outlet of the acid ejector (18) is communicated with a fine treatment system (20) through a condensed water fine treatment acid regenerated liquid outlet valve (8).
2. The system for sharing regeneration acid and alkali between condensate polishing and boiler makeup water treatment according to claim 1, characterized in that an alkali regeneration water temperature sensor (TE) and an alkali regeneration water flow rate sensor (F1) are provided on a pipe between the heating device (12) and the alkali regeneration water flow rate adjusting valve (2).
3. The system for sharing and regenerating acid and alkali between the condensate polishing and the boiler make-up water treatment according to claim 1, wherein an alkali metering tank alkali inlet valve (1) is provided between the alkali storage tank (13) and the alkali metering tank (14), and an alkali injector alkali inlet valve (9) is provided between the alkali metering tank (14) and the alkali injector (15).
4. The system for sharing and regenerating acid and alkali with boiler makeup water treatment according to claim 1, characterized in that an alkalimeter (J) is provided at the outlet of the alkaliejector (15).
5. The system for sharing regeneration acid and base between condensate polishing and boiler makeup water treatment according to claim 1, characterized in that an acid regeneration water flow sensor (F2) is provided on the pipe between the outlet of the regeneration water pump (11) and the acid regeneration water flow control valve (6).
6. The system for sharing and regenerating acid and alkali with boiler makeup water treatment according to claim 1, characterized in that an acid metering tank acid inlet valve (5) is provided between the acid storage tank (16) and the acid metering tank (17), and an acid injector acid inlet valve (10) is provided between the acid metering tank (17) and the acid injector (18).
7. The system for sharing and regenerating acid and alkali with boiler makeup water treatment according to claim 1, characterized in that an acidimeter (S) is provided at the outlet of the acid ejector (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010193284.6A CN111333149A (en) | 2020-03-18 | 2020-03-18 | System for sharing and regenerating acid and alkali for condensate polishing and boiler feed water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010193284.6A CN111333149A (en) | 2020-03-18 | 2020-03-18 | System for sharing and regenerating acid and alkali for condensate polishing and boiler feed water treatment |
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| Publication Number | Publication Date |
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| CN111333149A true CN111333149A (en) | 2020-06-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010193284.6A Pending CN111333149A (en) | 2020-03-18 | 2020-03-18 | System for sharing and regenerating acid and alkali for condensate polishing and boiler feed water treatment |
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| CN (1) | CN111333149A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112588328A (en) * | 2020-11-20 | 2021-04-02 | 国家能源集团乐东发电有限公司 | Method for controlling regeneration dosage and concentration of ion exchange resin |
| CN112919607A (en) * | 2021-01-26 | 2021-06-08 | 华能国际电力股份有限公司日照电厂 | Method for adjusting pH value of wastewater |
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| CN104986825A (en) * | 2015-07-07 | 2015-10-21 | 杭州安耐杰科技有限公司 | Wastewater treatment process for ion exchange system |
| CN107971047A (en) * | 2017-11-27 | 2018-05-01 | 安徽金禾实业股份有限公司 | A kind of industrial soft water acid-alkali regeneration liquid recycling method and device |
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2020
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Patent Citations (4)
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| CN104986825A (en) * | 2015-07-07 | 2015-10-21 | 杭州安耐杰科技有限公司 | Wastewater treatment process for ion exchange system |
| CN107971047A (en) * | 2017-11-27 | 2018-05-01 | 安徽金禾实业股份有限公司 | A kind of industrial soft water acid-alkali regeneration liquid recycling method and device |
| CN108178240A (en) * | 2018-01-16 | 2018-06-19 | 中国神华能源股份有限公司 | Desalination mixed bed regeneration method |
| CN208554227U (en) * | 2018-06-08 | 2019-03-01 | 智胜化工股份有限公司 | A kind of self-checking device for Desalting Water System acid-alkali regeneration liquid concentration |
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| 黄成群: "《电厂化学》", 31 December 2007, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112588328A (en) * | 2020-11-20 | 2021-04-02 | 国家能源集团乐东发电有限公司 | Method for controlling regeneration dosage and concentration of ion exchange resin |
| CN112919607A (en) * | 2021-01-26 | 2021-06-08 | 华能国际电力股份有限公司日照电厂 | Method for adjusting pH value of wastewater |
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