CN217556004U - Small-sized device for purifying circulating water of SCAL type indirect air cooling unit - Google Patents
Small-sized device for purifying circulating water of SCAL type indirect air cooling unit Download PDFInfo
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- CN217556004U CN217556004U CN202221820802.3U CN202221820802U CN217556004U CN 217556004 U CN217556004 U CN 217556004U CN 202221820802 U CN202221820802 U CN 202221820802U CN 217556004 U CN217556004 U CN 217556004U
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Abstract
The utility model discloses a small device for purifying circulating water of an SCAL type indirect air cooling unit, which comprises a booster pump, a strong magnetic iron remover, a filter, a cation exchanger, an anion exchanger and a mixed bed which are sequentially connected in series, wherein each device is externally connected with a bypass pipeline, and each device inlet and outlet pipeline and the bypass pipeline are provided with valves; the diameter of the tank body of a single device is 100 to 1000mm. The small-size equipment can reach the treatment effect of large-scale system completely, need not regeneration, need not resin output and resin and pass back, the piping erection is very simple, and the work load is little, and the security is good. The utility model discloses a purify step by step, each grade of water treatment mode can be according to the nimble combination of actual quality of water characteristics, can realize the pertinence according to the on-the-spot quality of water condition and throw in, or realize interim protection through this unit of bypass when quality of water can't satisfy a certain unit, and is more free nimble, can implement swift the change to the unit that became invalid.
Description
Technical Field
The utility model belongs to the water treatment facilities field, concretely relates to purify small-size device of indirect air cooling unit circulating water of SCAL type.
Background
The circulating water of the SCAL type indirect air cooling unit is closed in a circulating water system, and flows in a stainless steel condenser, a carbon steel circulating water high-temperature section, a pure aluminum radiator and a carbon steel circulating water low-temperature section to contact with three different metal materials. Although the demineralized water is injected, the water quality is rapidly deteriorated. For circulating water of the SCAL type indirect air cooling unit, in the technical guide of chemical supervision of a DL/T1717-2017 gas-steam combined cycle power plant, the water quality standard is as follows: "conductivity (25 deg.C) is less than or equal to 5 mus/cm 2 And pH (25 ℃) is 7.0-8.3'. In addition, mechanical impurities (sand, soil, iron oxide, aluminum oxide, etc.) in the circulating water can scratch equipment and pipelines made of stainless steel, carbon steel and pure aluminum, so that the smaller the mechanical impurities, the better. In the existing SCAL type indirect air cooling unit which is actually operated, because no purification system is used for processing, the conductivity of circulating water exceeds the standard, and mechanical impurities in the circulating water are more.
The existing SCAL type indirect air cooling unit circulating water purification method specifically comprises the following methods:
1. the water is replaced by the desalted water, namely the desalted water is replaced by a large amount once, or the desalted water is replaced by a small flow continuously. But in practice, a single large change of demineralized water is difficult to achieve, and not so much demineralized water; the continuous small flow of the brine has little effect on mechanical impurities and conductivity reduction in the circulating water. The method of exchanging water with desalted water can not keep the quality of the circulating water up to the standard.
2. The large-scale water treatment equipment has large field construction amount and complex equipment maintenance, the desalting part is difficult to carry during movable regeneration, and the desalting part is complex in a fixed regeneration system and complex to operate.
3. With the addition of the corrosion inhibitor, the core of the technology of purifying the water body is two technical routes. The consumption of the corrosion inhibitor is long, and the specific control and the corrosion prevention effect of the iron and aluminum materials in the system are verified for a long time.
4. The chilled water is fed into the process using the existing processing equipment of the plant using pipeline technical modifications. The scheme occupies the original water treatment system, can not realize independent operation of each system, and has operation risk.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a small device for purifying circulating water of an SCAL type indirect air cooling unit. In order to achieve the purpose, the utility model provides a technical scheme as follows:
a purify small-size device of indirect air cooling unit circulating water of SCAL type includes:
the booster pump, the strong magnetic iron remover, the filter, the cation exchanger, the anion exchanger and the mixed bed are sequentially connected in series, each device is externally connected with a bypass pipeline, and valves are arranged on the inlet and outlet pipeline and the bypass pipeline of each device; the diameter of the tank body of a single device is 100-1000 mm.
The strong magnetic iron remover, the filter, the cation exchanger, the anion exchanger and the mixed bed are connected with the pipeline through a quick flange or a buckle.
And sampling points or online instruments for monitoring the quality of the effluent of the equipment are arranged at the water outlet points of the cation exchanger, the anion exchanger and the mixed bed.
And the water inlet section and the water outlet section of the filter are provided with pressure monitoring devices.
The device is also provided with a heat exchanger in front of the booster pump.
The water inlet pipe or the water outlet pipe of the device is connected with return pipes of different sectors of the indirect cooling system or the inspection manholes of the water inlet pipe, the breather valve or the drain valve of the pipeline.
The water inlet pipe of the device is connected with an inspection manhole, a breather valve or a pipeline drain valve of a return water pipe of a certain sector of the indirect cooling system, and the water outlet pipe is connected with an underground water tank.
The small devices are arranged in a standard container in a single row or two rows.
Compared with the prior art, the beneficial effects of the utility model are that:
compare with prior art trades water with demineralized water, the utility model discloses practice thrift a large amount of demineralized water, enable circulating water quality of water and keep up to standard.
The small-size equipment can reach large-scale system's treatment effect completely, and strong magnetic deironing ware can deal with the water quality treatment requirement that the iron content is high, and the filter can hold back the mechanical impurities of tiny granule, and the desalination module contains cation exchanger, anion exchanger, mixes bed, EDI. The small-sized device does not need regeneration, resin output and resin return, the pipeline installation is very simple, the workload is small, and the safety is good.
The utility model discloses a purify step by step, each grade of water treatment mode can be according to the nimble combination of actual quality of water characteristics, can carry out quality of water characteristics pertinence selection combination mode as required, and the last one-level unit has the guard action to next unit, and every processing unit is equipped with independent bypass, can realize the pertinence according to the on-the-spot quality of water condition and throw in, or realize interim protection through this unit of bypass when quality of water can't satisfy a certain unit, and is more free nimble. And the filtering unit and the desalting unit which are failed can be quickly replaced.
Drawings
Fig. 1 is a schematic diagram of an apparatus according to an embodiment of the present invention.
Fig. 2 is a device engineering diagram of an embodiment of the present invention.
Fig. 3 is a schematic view of another embodiment of the present invention.
Fig. 4 is a device engineering diagram of another embodiment of the present invention.
In the figure, 1-booster pump, 2-strong magnetic deironing device, 3-filter, 4-positive bed, 5-negative bed, 6-mixed bed, 7-inlet water main valve, 8-outlet water main valve, 9-strong magnetic deironing device inlet valve, 10-filter inlet valve, 11-positive bed inlet valve, 12-negative bed inlet valve, 13-mixed bed inlet valve, 14-strong magnetic deironing device outlet valve, 15-filter outlet valve, 16-positive bed outlet valve, 17-negative bed outlet valve, 18-mixed bed outlet valve, 19-strong magnetic deironing device bypass valve, 20-filter bypass valve, 21-positive bed bypass valve, 22-negative bed bypass valve, 23-mixed bed bypass valve, 24-strong magnetic deironing device sampling blow-down valve, 25-filter sampling blow-down valve, 26-positive bed outlet water sampling point, 27-negative bed outlet water sampling point, 28-mixed bed outlet water sampling point, 29-first maintenance manhole, 30-second maintenance manhole, 31-inlet water valve, 31-pressure gauge, 32-positive bed outlet water sampling point, 27-negative bed outlet water sampling point, 28-mixed bed outlet water heat exchanger outlet valve, 35-pressure gauge, 35-heat exchanger outlet valve, 36-pressure gauge.
Detailed Description
The utility model provides a purify small-size device of indirect air cooling unit circulating water of SCAL type, as shown in figure 1.
The small-sized equipment is connected with two sectors in the indirect cooling system through the first service manhole 29 and the second service manhole 30 of the processed pipeline.
When the equipment is put into operation, the equipment water inlet main valve 7, the strong magnetic iron remover water inlet valve 9, the strong magnetic iron remover water outlet valve 14, the filter water inlet valve 10, the filter water outlet valve 15, the male bed water inlet valve 11, the male bed water outlet valve 16, the female bed water inlet valve 12, the female bed water outlet valve 17, the mixed bed water inlet valve 13, the mixed bed water outlet valve 18 and the equipment water outlet main valve 8 are opened, and the booster pump 1 is started.
In the figure, the inlet and the outlet of the filter are respectively provided with a filter inlet pressure gauge 31 and a filter outlet pressure gauge 32, and whether the filter element of the filter is replaced or not is determined by observing the pressure difference of the filter. As shown in the figure, a cation bed effluent sampling point 26, an anion bed effluent sampling point 27 and a mixed bed effluent sampling point 28 are arranged, and an on-line conductivity meter is arranged behind a cation bed effluent valve 16, an anion bed effluent valve 17 and a mixed bed effluent valve 18 to judge whether the cation bed, the anion bed and the mixed bed are failed. The strong magnetic iron remover bypass door 19, the filter bypass door 20, the positive bed bypass door 21, the negative bed bypass door 22 and the mixed bed bypass door 23 are used for switching the operation mode of equipment and facilitating equipment maintenance. The device is also provided with a sampling and sewage discharging valve 24 of the strong magnetic iron remover and a sampling and sewage discharging valve 25 of the filter. The mixed bed 6 can be replaced equivalently with EDI.
The utility model provides a purify small-size device of indirect air cooling unit circulating water of SCAL type, as shown in figure 3.
When the water inlet temperature of the small equipment is more than or equal to 60 ℃, the equipment needs to be put into operation while the heat exchanger 36 is kept in operation.
And opening an equipment water inlet main valve 7, a booster pump water outlet valve 33, a heat exchanger water inlet valve 34, a heat exchanger water outlet valve 35, a strong magnetic iron remover water inlet valve 9, a strong magnetic iron remover water outlet valve 14, a filter water inlet valve 10, a filter water outlet valve 15, a cation bed water inlet valve 11, a cation bed water outlet valve 16, an anion bed water inlet valve 12, an anion bed water outlet valve 17, a mixed bed water inlet valve 13, a mixed bed water outlet valve 18 and an equipment water outlet main valve 8, and starting the booster pump 1.
In the figure, the inlet and the outlet of the filter are respectively provided with a filter inlet pressure gauge 31 and a filter outlet pressure gauge 32, and whether the filter element of the filter is replaced or not is determined by observing the pressure difference of the filter. As shown in the figure, an anode bed effluent sampling point 26, an cathode bed effluent sampling point 27 and a mixed bed effluent sampling point 28 are arranged, and an on-line conductance meter is arranged behind an anode bed effluent valve 16, a cathode bed effluent valve 17 and a mixed bed effluent valve 18 to judge whether the anode bed, the cathode bed and the mixed bed are failed. The strong magnetic iron remover bypass door 19, the filter bypass door 20, the positive bed bypass door 21, the negative bed bypass door 22, the mixed bed bypass door 23 and the heat exchanger bypass door 37 are used for switching the operation mode of equipment and facilitating equipment maintenance. The device is also provided with a sampling and sewage discharging valve 24 of the strong magnetic iron remover and a sampling and sewage discharging valve 25 of the filter. The mixed bed 6 can be replaced equivalently with EDI.
The 1000mm diameter of the single tank is installed in the container, and a standard container is needed to be arranged in two rows, the whole size is about 4.8m2.4m2.6m, and the treatment capacity is about 10 tons/hour.
The 100mm integral apparatus of a single tank was placed in a container with an overall size of about 1.5m and a throughput of about 2 tons/hour.
Any flow between these can be sized accordingly to the flow design. Preferably, the diameter of the pot is 500mm and the handling capacity is 6 tons/hour.
Use the small-size device is handled to bypass flow, through switch bypass door various module combination forms in the realization device, for example following scheme:
1) A filter and a mixed bed;
2) Filter + EDI;
3) A filter, a cation bed and an anion bed;
4) A filter, a cation bed, an anion bed and a mixed bed;
5) Filter + cation bed + anion bed + EDI;
6) A strong magnetic iron remover, a filter and a mixed bed;
7) Strong magnetic iron remover + filter + EDI;
8) A strong magnetic iron remover, a filter, an anode bed and a cathode bed;
9) A strong magnetic iron remover, a filter, an anode bed, a cathode bed and a mixed bed;
10 A strong magnetic iron remover + filter + anode bed + cathode bed + EDI.
Example 1
A350 MW unit of a certain power plant is an SCAL type indirect air cooling unit, the total circulating water body is cultivated by 5000m, the total circulating water body is cultivated for about 1 year, and the temperature of the low-temperature section of the circulating water is 30-48 ℃. Silt and rust exist in the circulating water, the water body is slightly turbid, and the highest conductivity reaches 35 mu s/cm 2 Always exceeds the standard. The PH value is maintained between 8.0 and 8.9 and exceeds the standard all the time. The water quality purification treatment is carried out by adopting the device of the utility model.
The water is taken from the low-temperature section branch pipes of 2 sectors, 3 sectors, 4 sectors, 5 sectors and 6 sectors in the inter-group cooling systems respectively and is respectively connected with five small devices for purifying circulating water of the SCAL type indirect air cooling units. Pressurizing by a booster pump, putting the filter with the large flow filter element into operation, putting the cation exchanger and the anion exchanger into operation, putting the mixed bed into operation, and finally returning to the low-temperature section of the circulating water.The circulating water bypass flow treatment flow is 6t/h of each device, the total treatment capacity is 30t/h, the device runs for three weeks, and filter elements of the filter are replaced in time according to the pressure difference condition in the period; and (4) replacing the cation exchanger, the anion exchanger and the mixed bed module twice according to the conductivity judgment of each level of desalting module. The conductivity of the circulating water is less than or equal to 2 mu s/cm 2 The pH value is 7.3 to 8.0, the water quality is clear and turbidity is less than or equal to 10UNT, and the water quality reaches the standard comprehensively.
Example 2
A660 MW supercritical generator set of a certain power plant is an SCAL type indirect air cooling unit, the total water body of circulating water is 8000m in weight, the unit is commercially operated for about 2 years, and the temperature of the low-temperature section of the circulating water is 30-50 ℃. Silt and rust exist in the circulating water, the water body is light yellow and slightly turbid, and the highest conductivity reaches 22 mu s/cm 2 Always exceeds the standard. The pH was maintained at 7.1 to 7.9.
The water is taken from low-temperature section branch pipes of 2 sectors, 3 sectors, 4 sectors, 5 sectors, 6 sectors, 7 sectors and 8 sectors in the plurality of inter-cooling systems and is respectively connected with five small devices for purifying circulating water of the SCAL type indirect air cooling units. Pressurizing by a booster pump, putting the filter with the large flow filter element into operation, putting the cation exchanger and the anion exchanger into operation, putting the mixed bed into operation, and finally returning to the low-temperature section of the circulating water. The circulating water bypass flow treatment flow is 10t/h per device, the total treatment capacity is 70t/h, the device runs for five weeks, and filter elements of the filter are replaced in time according to the pressure difference condition; and (4) replacing the cation exchanger, the anion exchanger and the mixed bed module once respectively according to the conductivity judgment of each desalting module. The conductivity of the circulating water is less than or equal to 2 mu s/cm 2 The pH value is 7.3 to 8.1, the water quality is clear and turbidity is less than or equal to 10UNT, and the water quality reaches the standard comprehensively.
Example 3
A660 MW ultra-supercritical generator set of a certain power plant is an SCAL type indirect air cooling unit, the total water body of circulating water is 8000m in weight, the unit is commercially operated for about 1 year, and the temperature of a high-temperature section of the circulating water is 55-65 ℃. The circulating water contains silt and rust, the turbidity of the water body is 176 to 202NTU, and the highest conductivity reaches 30 to 50 mu s/cm 2 Always exceeding the standard. The pH is maintained between 7.5 and 8.2.
The water is taken from the high-temperature section branch pipes of 4, 5, 6, 7, 8 and 9 sectors in the cooling systems among several groups and is respectively connected with five SCAL-type purified indirect air roomsThe small-sized device for the circulating water of the cooling unit reflows to the high-temperature section of the circulating water after treatment. The circulating water bypass flow treatment flow is 5t/h per device, and the total treatment capacity is 30t/h. Pressurizing a booster pump in the early stage of treatment, and putting the high-flow filter element filter, the bypass cation exchanger, the bypass anion exchanger and the mixed bed into operation; after the operation is carried out for 3 weeks according to the mode, the turbidity of the intercooling circulating water is reduced to 30 to 50NUT, the heat exchanger, the cation exchanger, the anion exchanger and the mixed bed are started to be operated for four weeks, and filter elements of the filter are replaced in time according to the pressure difference condition in the period; and (4) replacing the cation exchanger, the anion exchanger and the mixed bed module once respectively according to the conductivity judgment of each desalting module. The conductivity of the circulating water is less than or equal to 2 mu s/cm 2 The pH value is 7.3 to 8.2, the turbidity is less than or equal to 10UNT, the water quality is clear, and the water quality reaches the standard comprehensively.
In the implementation of the method, the pressure brought by a large amount of the exchanged and desalted water to the power plant water production is completely avoided; because each part involved is targeted, the use and combination are flexible, and 10 combination modes can be provided. All modules in the device can be combined at will according to the field requirements to deal with different water qualities. The above description is only the preferred embodiment of the present invention.
Claims (8)
1. The utility model provides a purify small-size device of indirect air cooling unit circulating water of SCAL type which characterized in that:
the method comprises the following steps: a booster pump (1), a strong magnetic iron remover (2), a filter (3), a cation exchanger (4), an anion exchanger (5) and a mixing bed (6) are sequentially connected in series, each device is externally connected with a bypass pipeline, and valves are arranged on an inlet pipeline and an outlet pipeline of each device and the bypass pipeline; the diameter of the tank body of a single device is 100-1000 mm.
2. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 1, wherein:
the strong magnetic iron remover, the filter, the cation exchanger, the anion exchanger and the mixed bed are connected with the pipeline through a quick flange or a buckle.
3. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 2, wherein:
and sampling points or online instruments for monitoring the quality of the effluent of the equipment are arranged at the water outlet points of the cation exchanger, the anion exchanger and the mixed bed.
4. A small-sized apparatus for purifying circulating water of an SCAL type indirect air-cooling unit according to claim 3, wherein:
and the water inlet section and the water outlet section of the filter are provided with pressure monitoring devices.
5. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 4, wherein:
the device is also provided with a heat exchanger in front of the booster pump (1).
6. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 5, wherein:
the water inlet pipe or the water outlet pipe of the device is connected with return pipes of different sectors of the indirect cooling system or the inspection manholes of the water inlet pipe, the breather valve or the drain valve of the pipeline.
7. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 5 is characterized in that:
the water inlet pipe of the device is connected with an inspection manhole, a breather valve or a pipeline drain valve of a return water pipe of a certain sector of the indirect cooling system, and the water outlet pipe is connected with an underground water tank.
8. The small-sized device for purifying the circulating water of the SCAL type indirect air-cooling unit according to claim 5, wherein:
the small devices are arranged in a standard container in a single row or two rows.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221820802.3U CN217556004U (en) | 2022-07-15 | 2022-07-15 | Small-sized device for purifying circulating water of SCAL type indirect air cooling unit |
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| CN202221820802.3U CN217556004U (en) | 2022-07-15 | 2022-07-15 | Small-sized device for purifying circulating water of SCAL type indirect air cooling unit |
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| CN217556004U true CN217556004U (en) | 2022-10-11 |
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| CN202221820802.3U Active CN217556004U (en) | 2022-07-15 | 2022-07-15 | Small-sized device for purifying circulating water of SCAL type indirect air cooling unit |
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