CN111204897A - Condensed water treatment device and condensed water treatment process - Google Patents
Condensed water treatment device and condensed water treatment process Download PDFInfo
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- CN111204897A CN111204897A CN202010045543.0A CN202010045543A CN111204897A CN 111204897 A CN111204897 A CN 111204897A CN 202010045543 A CN202010045543 A CN 202010045543A CN 111204897 A CN111204897 A CN 111204897A
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F2001/427—Treatment of water, waste water, or sewage by ion-exchange using mixed beds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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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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Abstract
The invention discloses a condensed water treatment device and a condensed water treatment process, wherein the device comprises a condensed water tank and a process device, the process device is connected with the condensed water tank, the condensed water tank is connected with an ultrafiltration system, the ultrafiltration system is connected with a mixed ion exchanger, the mixed ion exchanger is connected with a demineralized water tank, the mixed ion exchanger is also respectively connected with an acid storage tank and an alkali storage tank, and the mixed ion exchanger is connected with an acid-alkali regulation pool through a pipeline; the condensed water treatment device also comprises a water quality monitoring system and a control system. The invention also comprises a process for treating the condensed water by adopting the device. The condensed water treatment device has the advantages of simple structure, quick operation, capability of quickly finishing the filtration treatment of the condensed water, no need of a large number of activated carbon filters, small occupied area and lower treatment cost, and effectively solves the problems of short service life, frequent replacement, difficult operation of the activated carbon filters, large occupied area, high energy consumption and higher cost of the folded filter elements.
Description
Technical Field
The invention belongs to the technical field of condensed water treatment, and particularly relates to a condensed water treatment device and a condensed water treatment process.
Background
At present, a device and a process for treating condensed water mainly adopt a folding filter element to remove iron and mechanical impurities, an active carbon filter is used for removing oil and organic matters, and finally a mixed bed is used for desalting, so that the requirement of treating the water quality by the condensed water is met. However, the following problems are mainly reflected in the process: the folding filter element is frequently replaced, and needs to be replaced within 3 months in the shortest time, which brings difficulty to the stable operation of the process and increases the investment of the operation cost, thus leading the treatment cost of the condensed water to be higher; the temperature of the condensed water is required to be reduced to below 40 ℃ to ensure the adsorption performance of the activated carbon, so that a large amount of circulating cooling water is required to exchange heat with the condensed water, and the treated condensed water is required to be further heated to meet the requirement of a boiler deaerator, so that the energy loss is huge, and a large amount of circulating cooling water is consumed; the filtering speed of the activated carbon filter is low, when the condensed water with a certain scale is treated, the number of the activated carbon filters is large, the occupied area is large, and meanwhile, the back washing water quantity of the activated carbon filter is large, so that the recovery rate of the condensed water is greatly reduced; the activated carbon needs to be replaced in time after being adsorbed and saturated, which brings great difficulty to operation and operation, and the treatment of the waste activated carbon also becomes a difficult problem; the resin adopted by the existing mixed bed can not be regenerated quickly, and the normal operation of the mixed bed is influenced.
Disclosure of Invention
In order to overcome the defects, the invention provides the condensed water treatment device and the condensed water treatment process, the condensed water treatment device has a simple structure, is quick to operate, can quickly finish the filtration treatment of the condensed water, does not need a large number of activated carbon filters, has small occupied area and lower treatment cost, and effectively solves the problems of short service life, frequent replacement, difficult operation of the activated carbon filters, large occupied area, high energy consumption and higher cost of the folded filter elements.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the condensate water treatment device comprises a condensate water tank and a process device, wherein the process device is connected with the condensate water tank through a recovery pump, the condensate water tank is connected with an ultrafiltration system through a pipeline, an ultrafiltration device and a back flushing device are arranged in the ultrafiltration system, the ultrafiltration system is connected with a mixed ion exchanger through a pipeline, anion resin and cation resin are filled in the mixed ion exchanger, the mixed ion exchanger is connected with a desalting water tank through a pipeline, the mixed ion exchanger is also connected with an acid storage tank and an alkali storage tank through pipelines respectively, hydrochloric acid solution and sodium hydroxide solution are filled in the acid storage tank and the alkali storage tank respectively, the mixed ion exchanger is connected with an acid-alkali regulation pool through a pipeline, and the ultrafiltration system, the mixed ion exchanger and the desalting water tank are all connected with the process device;
the condensate water treatment device also comprises a water quality monitoring system and a control system, wherein the water quality monitoring system and the control system are used for detecting the pH value and the conductivity in the condensate water on line, the water quality monitoring system is electrically connected with the control system, the water quality monitoring system is connected with the condensate water tank, the process device, the ultrafiltration system, the mixed ion exchanger, the demineralized water tank and the acid-base regulating tank, each pipeline in the condensate water treatment device is provided with a pneumatic control valve, and the pneumatic control valves are connected with the control system.
Further, the ultrafiltration device comprises an organic metal ultrafiltration membrane, a connecting pipeline, a pneumatic control valve and a cleaning device.
Further, the organometallic ultrafiltration membrane is a Titan70 ultrafiltration membrane.
Further, the anion resin is macroporous weak base type anion resin, and the cation resin is super gel uniform particle type cation resin.
Further, the water quality monitoring system comprises a conductivity monitor and a pH detector.
The process for treating the condensed water by adopting the condensed water treatment device sequentially comprises the following steps:
(1) pretreating the condensed water to obtain primary treated condensed water;
(2) introducing the primary treatment condensed water obtained in the step (1) into a mixed ion exchanger, and removing ions in the water by using anion resin and cation resin to obtain secondary treatment condensed water when the electric conductivity is less than 0.2 mu S/cm;
(3) and (3) introducing the secondary treatment condensed water obtained in the step (2) into a desalted water tank, and reusing the condensed water in the process device.
Further, the concrete process for pretreating the condensed water comprises the following steps: and (3) pumping the condensed water from the process device into a condensed water tank and an ultrafiltration system in sequence through a recovery pump to remove suspended matters and iron ions, thus obtaining the primary treated condensed water.
Further, the anion resin and the cation resin in the mixed ion exchanger can be regenerated for use.
Further, the anion resin and cation resin regeneration process comprises the following steps: respectively preparing a 4-6 wt% hydrochloric acid solution and a 4-6 wt% sodium hydroxide solution by an acid ejector and an alkali ejector, then respectively entering a mixed ion exchanger to regenerate the anion resin and the cation resin, and finishing the regeneration of the anion resin and the cation resin.
Further, wastewater generated in the regeneration process of the anion resin and the cation resin is introduced into an acid-base adjusting tank, and the pH value is adjusted to 7 +/-0.5 and then discharged.
In summary, the invention has the following advantages:
1. the condensed water treatment device simplifies the treatment process into two parts of ultrafiltration system filtration and mixed ion exchanger treatment, simplifies the process steps, has high operation speed, can quickly finish the filtration treatment of the condensed water, does not need to frequently replace the folded filter element compared with the original folded filter element and active carbon filtration, reduces the treatment cost of the condensed water, does not adopt active carbon filtration, does not need to specially reduce the temperature of the condensed water to be below 40 ℃, can still work at the temperature of 50-60 ℃, has wider application prospect, does not need a large amount of circulating cooling water, reduces the energy consumption in the treatment process, and further reduces the treatment cost; the device can complete the filtration work only by the ultrafiltration device, the occupied area is small, the backwashing water amount is small, and the recovery rate of the condensed water is improved; the anion resin and the cation resin in the mixed ion exchanger can be regenerated and used without frequent replacement, thereby reducing the treatment cost and effectively solving the problems of short service life of the folded filter element, frequent replacement, difficult operation of the activated carbon filter, large occupied area, high energy consumption and higher cost.
2. When the condensate water treatment device is in operation, condensate water used in the process device is pumped into a condensate water tank through a recovery pump, then is introduced into an ultrafiltration system, is filtered through an organic metal ultrafiltration membrane in an ultrafiltration device to remove suspended matters, most iron ions and other substances in the condensate water, then is introduced into a mixed ion exchanger to further remove residual ions in the water, and finally enters a demineralized water tank to be reused in the process device. And preparing a 4-6 wt% hydrochloric acid solution through an acid storage tank and an ejector, preparing a 4-6 wt% sodium hydroxide solution through an alkali storage tank and an ejector, and respectively entering a mixed ion exchanger for use to complete the regeneration and the use of the anion resin and the cation resin. And introducing the wastewater generated in the regeneration process of the anion resin and the cation resin into an acid-base adjusting tank, adjusting the pH value to 7 +/-0.5, and then discharging. In the using process, the water quality monitoring system monitors parameters such as the pH value, the conductivity and the like of the condensed water in the condensed water tank, the process device, the ultrafiltration system, the mixed ion exchanger, the demineralized water tank and the acid-base regulating reservoir in real time, and the condensed water is reused in the process device after the quality of the condensed water is qualified; and the control system is used for maintaining the orderly operation of the whole device and controlling the on-off of each pipeline through the pneumatic control valve, thereby realizing the automatic control of the condensed water treatment process.
3. In the device, an organic metal ultrafiltration membrane is adopted to replace a folding filter element and an active carbon filter, mechanical impurities, suspended matters and most iron ions in the condensed water are removed, residual ions in the water are further removed through a mixed ion exchanger, and then the water enters a demineralized water tank and enters a process device again for use. The organic metal ultrafiltration membrane adopted in the invention has the characteristics of super-strong hydrophilicity and oleophobicity, high flux, high interception, pollution resistance, easy cleaning and the like, and has strong chemical stability; the organic metal ultrafiltration membrane is composed of an organic metal coating with international patent protection and a traditional organic support membrane. The organometallic coating is tightly bonded to the support layer to support backwash operations. And in the using process, the condensate water obtained by treatment can be adopted to carry out back washing on the ultrafiltration device, so that the reduction of the filtration efficiency due to long-time work is prevented, the ultrafiltration membrane does not need to be frequently replaced, and the service life is prolonged.
4. According to the invention, the anion resin and the cation resin are mixed, and the mixed resin and the condensed water are subjected to anion and cation exchange for desalting and removing organic matters, so that the mixed ion exchanger is high-temperature resistant, strong in impact resistance and wider in application range; and the device is also provided with a regeneration device of the anion resin and the cation resin, so that the anion resin and the cation resin can be regenerated and used, and the treatment cost of the condensed water is reduced.
Drawings
FIG. 1 is a schematic view of a condensate treatment apparatus;
wherein, 1, a condensation water tank; 2. a process unit; 3. an ultrafiltration system; 4. a mixed ion exchanger; 5. a demineralized water tank; 6. an acid storage tank; 7. an alkali storage tank; 8. and an acid-base adjusting tank.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In one embodiment of the present invention, as shown in fig. 1, there is provided a condensed water treatment apparatus, comprising a condensed water tank 1 and a process apparatus 2, wherein the process apparatus 2 is connected to the condensed water tank 1 through a recovery pump, the condensed water tank 1 is connected to an ultrafiltration system 3 through a pipeline, an ultrafiltration apparatus and a backwashing apparatus are arranged in the ultrafiltration system 3, the ultrafiltration apparatus comprises a Titan70 ultrafiltration membrane, a connecting pipeline, a pneumatic control valve and a cleaning apparatus, the ultrafiltration system 3 is connected to a mixed ion exchanger 4 through a pipeline, the mixed ion exchanger 4 is filled with a macroporous weak base type anion resin and a super gel homogeneous particle type cation resin, the mixed ion exchanger 4 is connected to a desalted water tank 5 through a pipeline, the mixed ion exchanger 4 is further connected to an acid storage tank 6 and an alkali storage tank 7 through pipelines, and the acid storage tank 6 and the alkali storage tank 7 are filled with a hydrochloric acid solution and a sodium hydroxide solution respectively, the mixed ion exchanger 4 is connected with an acid-base regulating tank 8 through a pipeline, and the ultrafiltration system 3, the mixed ion exchanger 4 and the desalting water tank 5 are all connected with the process device 2; the condensate water treatment device also comprises a water quality monitoring system and a control system for detecting the pH value and the conductivity in the condensate water on line, the water quality monitoring system is electrically connected with the control system, the water quality monitoring system comprises a conductivity monitor and a pH detector, the water quality monitoring system is connected with the condensate water tank 1, a process device 2, an ultrafiltration system 3, a mixed ion exchanger 4, a desalting water tank 5 and an acid-base regulating tank 8, each pipeline in the condensate water treatment device is provided with a pneumatic control valve, and the control valves are started and stopped through the control system.
The process for treating the condensed water by adopting the condensed water treatment device sequentially comprises the following steps:
(1) pretreating the condensed water to obtain primary treated condensed water;
(2) introducing the primary treatment condensed water obtained in the step (1) into a mixed ion exchanger 4, and removing ions in the water by using anion resin and cation resin to ensure that the secondary treatment condensed water is obtained when the electric conductivity is less than 0.2 mu S/cm;
(3) and (3) introducing the secondary treatment condensed water obtained in the step (2) into a desalting water tank 5, and reusing the condensed water in the process device 2.
The concrete process for pretreating the condensed water comprises the following steps: and (3) pumping the condensed water from the process device 2 into the condensed water tank 1 and the ultrafiltration system 3 in sequence through a recovery pump to remove suspended matters and iron ions, thus obtaining the primary treatment condensed water.
The anion resin and cation resin regeneration process comprises the following steps: respectively preparing 5 wt% hydrochloric acid solution and 5 wt% sodium hydroxide solution by an ejector, regenerating the anion resin and the cation resin, and then respectively entering the mixed ion exchanger 4 for use to complete the regeneration and the use of the anion resin and the cation resin.
And introducing the wastewater generated in the regeneration process of the anion resin and the cation resin into an acid-base adjusting tank 8, adjusting the pH value to 7 +/-0.5, and then discharging.
When the device is used, the condensed water used in the process device 2 is pumped into the condensed water tank 1 through the recovery pump, then is introduced into the ultrafiltration system 3, is filtered through the organic metal ultrafiltration membrane in the ultrafiltration device to remove suspended matters, most of iron ions and other substances in the condensed water, then is introduced into the mixed ion exchanger 4 to further remove residual ions in the water, and finally enters the desalted water tank 5 to be reused in the process device 2. The acid storage tank 6 and the ejector are used for preparing 5 wt% hydrochloric acid solution, the alkali storage tank 7 and the ejector are used for preparing 5 wt% sodium hydroxide solution, and the solution enters the mixed ion exchanger 4 for use, so that the regeneration and the use of the anion resin and the cation resin are completed. And introducing the wastewater generated in the regeneration process of the anion resin and the cation resin into an acid-base adjusting tank 8, adjusting the pH value to 7 +/-0.5, and then discharging. In the using process, the water quality monitoring system monitors parameters such as the pH value, the conductivity and the like of the condensed water in the condensed water tank 1, the process device 2, the ultrafiltration system 3, the mixed ion exchanger 4, the demineralized water tank 5 and the acid-base regulating tank 8 in real time, and the condensed water is reused in the process device 2 after the quality of the condensed water is qualified; and the control system is used for maintaining the orderly operation of the whole device and controlling the on-off of each pipeline through the pneumatic control valve, thereby realizing the automatic control of the condensed water treatment process.
The condensed water treatment device simplifies the treatment process into two parts of filtering by the ultrafiltration system 3 and treating by the mixed ion exchanger 4, simplifies the process steps, has high operation speed, can quickly finish the filtering treatment of the condensed water, does not need to frequently replace the folding filter element compared with the original folding filter element and active carbon filtering, reduces the treatment cost of the condensed water, does not adopt active carbon for filtering, does not need to specially reduce the temperature of the condensed water to be below 40 ℃, can still work at the temperature of 50-60 ℃, has wider application prospect, does not need a large amount of circulating cooling water, reduces the energy consumption in the treatment process, and further reduces the treatment cost; the device can complete the filtration work only by the ultrafiltration device, the occupied area is small, the backwashing water amount is small, and the recovery rate of the condensed water is improved; the anion resin and the cation resin in the mixed ion exchanger 4 can be regenerated and used without frequent replacement, thereby reducing the treatment cost and effectively solving the problems of short service life of the folded filter element, frequent replacement, difficult operation of the activated carbon filter, large occupied area, high energy consumption and higher cost.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (9)
1. The condensed water treatment device is characterized by comprising a condensed water tank (1) and a process device (2), wherein the process device (2) is connected with the condensed water tank (1) through a recovery pump, the condensed water tank (1) is connected with an ultrafiltration system (3) through a pipeline, an ultrafiltration device and a backwashing device are arranged in the ultrafiltration system (3), the ultrafiltration system (3) is connected with a mixed ion exchanger (4) through a pipeline, the mixed ion exchanger (4) is filled with anion resin and cation resin, the mixed ion exchanger (4) is connected with a desalted water tank (5) through a pipeline, the mixed ion exchanger (4) is also connected with an acid storage tank (6) and an alkali storage tank (7) through pipelines, and hydrochloric acid solution and sodium hydroxide solution are respectively filled in the acid storage tank (6) and the alkali storage tank (7), the mixed ion exchanger (4) is connected with an acid-base adjusting tank (8) through a pipeline, and the ultrafiltration system (3), the mixed ion exchanger (4) and the desalted water tank (5) are all connected with the process device (2);
the condensate water treatment device further comprises a water quality monitoring system and a control system, wherein the water quality monitoring system is used for detecting the pH value and the conductivity of condensate water on line, the water quality monitoring system is electrically connected with the control system, the water quality monitoring system is connected with the condensate water tank (1), the process device (2), the ultrafiltration system (3), the mixed ion exchanger (4), the demineralized water tank (5) and the acid-base regulating reservoir (8) are connected, each pipeline in the condensate water treatment device is provided with a pneumatic control valve, and the pneumatic control valves are connected with the control system.
2. The condensate treatment apparatus of claim 1, wherein the ultrafiltration device comprises an organometallic ultrafiltration membrane, a connecting conduit, a pneumatic control valve, and a cleaning device.
3. The condensate treatment apparatus of claim 2, wherein the organometallic ultrafiltration membrane is a Titan70 ultrafiltration membrane.
4. The condensate treatment apparatus of claim 1, wherein the water quality monitoring system comprises a conductivity monitor and a pH detector.
5. A process for treating condensed water by using the condensed water treatment device as defined in any one of claims 1 to 4, comprising the following steps in sequence:
(1) pretreating the condensed water to obtain primary treated condensed water;
(2) introducing the primary treatment condensed water obtained in the step (1) into a mixed ion exchanger, and removing ions in the water through anion resin and cation resin to ensure that the electric conductivity is less than 0.2 mu S/cm to obtain secondary treatment condensed water;
(3) and (3) introducing the secondary treatment condensed water obtained in the step (2) into a desalted water tank, and reusing the condensed water in the process device.
6. The process for treating the condensed water by the condensed water treatment device according to claim 5, wherein the specific process for pretreating the condensed water comprises the following steps: and (3) pumping the condensed water from the process device into a condensed water tank and an ultrafiltration system in sequence through a recovery pump to remove suspended matters and iron ions, thus obtaining the primary treated condensed water.
7. The condensate water treatment apparatus as claimed in claim 5, wherein the anion resin and the cation resin in said mixed ion exchanger are regenerated for use.
8. The condensate treatment apparatus as claimed in claim 5, wherein the anion resin and cation resin regeneration process comprises the steps of: respectively preparing a 4-6 wt% hydrochloric acid solution and a 4-6 wt% sodium hydroxide solution through an acid ejector and an alkali ejector, and then respectively entering a mixed ion exchanger to complete the regeneration of the anion resin and the cation resin.
9. The process for treating the condensed water by the condensed water treatment device according to claim 8, wherein the waste water generated in the regeneration process of the anion resin and the cation resin is discharged into the acid-base adjusting tank, and is discharged after the pH value is adjusted to 7 +/-0.5.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113149278A (en) * | 2021-04-21 | 2021-07-23 | 新疆佳宇恒能源科技有限公司 | High-temperature condensed water collecting and treating method for petroleum refining |
| CN115028283A (en) * | 2022-05-30 | 2022-09-09 | 西安热工研究院有限公司 | Nuclear power station condensate fine treatment system and control method thereof |
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Application publication date: 20200529 |