CN213066079U - Device for reducing temperature of boiler blow-down water - Google Patents
Device for reducing temperature of boiler blow-down water Download PDFInfo
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- CN213066079U CN213066079U CN202022014256.1U CN202022014256U CN213066079U CN 213066079 U CN213066079 U CN 213066079U CN 202022014256 U CN202022014256 U CN 202022014256U CN 213066079 U CN213066079 U CN 213066079U
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Abstract
The utility model relates to a reduce device of boiler blow-down water temperature, including continuous blowdown expander, blowdown cooling pond, set up boiler blow-down water pipe between continuous blowdown expander and blowdown cooling pond, set up demineralized water heat transfer unit on boiler blow-down water pipe and the middle water tank that is linked together with demineralized water heat transfer unit. Compared with the prior art, the utility model utilizes the softened water heat exchange unit to cool the boiler blow-down water, not only utilizes the heat exchange mode to avoid the problem of resource waste caused by the mixed cooling of a large amount of tap water, effectively reduces the cost, but also fully recycles the heat of the boiler blow-down water, improves the water inlet temperature of the deaerator and saves the energy; through setting up circulating line and running water mixing unit, guaranteed that the temperature after the boiler blow-down water cooling can reach below 50 ℃, satisfy the emission requirement, have higher reliability, and easy and simple to handle.
Description
Technical Field
The utility model belongs to the technical field of boiler blow off water treatment, a reduce device of boiler blow off water temperature is related to.
Background
Boiler pollution discharge is to discharge boiler water polluted by salt and water slag in a boiler periodically, and comprises continuous pollution discharge and periodic pollution discharge. The aim of continuous sewage discharge is to discharge part of salt dissolved in the boiler water so as to maintain certain salt content and alkalinity of the boiler water. The sewage is continuously discharged from the evaporation surface with the maximum salt concentration of the boiler water, and is also called surface sewage.
Generally speaking, the continuous blowdown water of the boiler accounts for about 6 percent of the steam amount of the boiler, the temperature of the continuous blowdown water is close to 100 ℃, the continuous blowdown water is discharged into a blowdown cooling pool through a continuous blowdown expander, the discharged sewage is about 70 ℃ after being cooled by the blowdown cooling pool, and the requirement of GBT31962-2015 for water quality standard of sewage discharged into town sewers is not met. At present, most boiler rooms add tap water into boiler blow-down water for mixing and cooling so as to reduce the temperature of the boiler blow-down water, but the method has high cost and wastes resources.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a reduce device of boiler blow-down water temperature can still have low-cost advantage when reducing boiler blow-down water temperature.
The purpose of the utility model can be realized through the following technical scheme:
the utility model provides a reduce boiler blowdown water temperature's device, the device includes continuous blowdown expander, blowdown cooling tank, sets up the boiler blow-down sewage pipeline between continuous blowdown expander and blowdown cooling tank, sets up the demineralized water heat transfer unit on boiler blow-down sewage pipeline and the middle water tank that is linked together with demineralized water heat transfer unit.
Generally speaking, the boiler make-up water mainly comprises 80% of steam condensate and 20% of softened water, wherein the softened water is normal-temperature water obtained by softening tap water. The utility model utilizes softened water to exchange heat with the boiler blow-off water of nearly 100 ℃ coming out from the continuous blow-off expander, so that the temperature of the boiler blow-off water finally discharged into the blow-off cooling pool is below 50 ℃, and the boiler blow-off water is further cooled and discharged by the blow-off cooling pool; meanwhile, softened water enters the intermediate water tank after absorbing heat and is mixed with the recovered steam condensate, so that the water temperature of the intermediate water tank is improved.
Further, the device also comprises a controller electrically connected with the softened water heat exchange unit. The controller regulates and controls the heat exchange process of the softened water to ensure that the temperature of the boiler blow-down water finally discharged into the blow-down cooling pool is below 50 ℃.
Further, the controller is a PLC controller.
Furthermore, the softened water heat exchange unit comprises a heat exchanger arranged on the boiler sewage discharge pipeline, a softened water inlet pipeline and a softened water outlet pipeline, the softened water inlet pipeline is communicated with the softened water outlet pipeline through the heat exchanger, and the intermediate water tank is communicated with one end of the softened water outlet pipeline. Softened water in the softened water inlet pipeline is introduced into the heat exchanger to exchange heat with boiler sewage in the boiler sewage discharge pipeline, and then enters the intermediate water tank through the softened water outlet pipeline.
Furthermore, an electric flow regulating valve is arranged on the softened water inlet pipeline and is electrically connected with the controller. The controller adjusts the flow of softened water through the electric flow regulating valve, and then controls the temperature of the boiler after the sewage is cooled.
Furthermore, a first thermometer electrically connected with the controller is arranged on the boiler sewage draining pipeline, and the first thermometer is positioned at the downstream of the heat exchanger. The first thermometer monitors the temperature of the cooled boiler blow-down water and feeds the temperature back to the controller.
Furthermore, the softened water heat exchange unit also comprises a circulating pipeline, wherein both ends of the circulating pipeline are communicated with the boiler sewage discharge pipeline, the outlet end of the circulating pipeline is positioned at the upstream of the heat exchanger, and the inlet end of the circulating pipeline is positioned at the downstream of the first thermometer. If the temperature of the cooled boiler blow-down water meets the requirement, the cooled boiler blow-down water directly enters a blow-down cooling pool; if the temperature of the cooled boiler blow-down water is still too high, the cooled boiler blow-down water is introduced into the circulating pipeline and returns to the upstream of the heat exchanger again to be conveyed to continue cooling, and the conveying amount of softened water is correspondingly adjusted by utilizing the electric flow regulating valve, so that the temperature of the boiler blow-down water reaches a set range.
Furthermore, a first electromagnetic three-way valve electrically connected with the controller is arranged on the boiler sewage draining pipeline, the first electromagnetic three-way valve is positioned at the downstream of the first thermometer, and the inlet end of the circulating pipeline is connected with the first electromagnetic three-way valve. The first electromagnetic three-way valve comprises an inlet end and two outlet ends, when the temperature of the cooled boiler blow-down water reaches the discharge requirement, the outlet end of the first electromagnetic three-way valve connected with the blowdown cooling pool is opened, and the outlet end connected with the circulating pipeline is closed, so that the boiler blow-down water is discharged into the blowdown cooling pool; if the temperature of the cooled boiler blow-off water is still too high, the outlet end of the first electromagnetic three-way valve connected with the blow-off cooling pool is closed, and the outlet end connected with the circulating pipeline is opened, so that the boiler blow-off water enters the circulating pipeline and returns to the upstream of the heat exchanger again to further exchange heat and cool the boiler blow-off water until the temperature reaches the set temperature.
Further, demineralized water heat transfer unit still include running water mixing unit, this running water mixing unit including set up on boiler blow-off water pipeline and with the second electromagnetic three-way valve that the controller is electric is connected, bypass pipe and set up the blending tank on bypass pipe, second electromagnetic three-way valve be located between first electromagnetic three-way valve and blowdown cooling pond, the entrance point and the second electromagnetic three-way valve of bypass pipe link to each other, the exit end links to each other with blowdown cooling pond, the blending tank on be equipped with running water pipeline, the blending tank in be equipped with the second thermometer of being connected with the controller electricity. Because the proportion of softened water in boiler make-up water cannot exceed 20%, the input quantity of softened water cannot be increased without limit to provide more cold energy for cooling the boiler blow-off water. And when the softened water flow reaches the maximum value and the boiler blow-off water can not be reduced to below 50 ℃, further mixing and cooling the cooled boiler blow-off water by using the tap water mixing unit. Because the temperature of the boiler sewage is lower at the moment, the boiler sewage can be reduced to below 50 ℃ by only adding a small amount of tap water.
When the tap water mixing unit needs to be used, the controller regulates and controls the second electromagnetic three-way valve, so that boiler blow-down water cooled in the boiler blow-down water pipeline enters the bypass pipeline and further enters the mixing tank, then a certain amount of tap water is added into the mixing tank through the tap water pipeline, and the temperature of mixed water in the mixing tank is monitored by the second thermometer. When the temperature is below 50 ℃, the mixed water can be introduced into a pollution discharge cooling pool.
Furthermore, a high-temperature water pump is arranged on the boiler sewage discharge pipeline. The high-temperature water pump is used for improving the liquid pressure, promoting the liquid to flow, controlling the flow direction and avoiding the reverse flow.
The utility model discloses in, can be according to actual conditions, set up heat exchanger, high temperature water pump etc. respectively side by side 2 or a plurality of.
When the utility model is in practical use, the boiler blow-off water in the boiler blow-off water pipeline exchanges heat with the softened water in the softened water heat exchange unit and is cooled, and the boiler blow-off water is discharged into the blow-off cooling pool after reaching the standard below 50 ℃; meanwhile, softened water in the softened water heat exchange unit enters the intermediate water tank after being subjected to heat exchange and temperature rise to serve as boiler water supplement.
Compared with the prior art, the utility model has the characteristics of it is following:
1) the softened water heat exchange unit is used for cooling the boiler blow-down water, so that the problem of resource waste caused by the mixed cooling of a large amount of tap water is solved by using a heat exchange mode, the cost is effectively reduced, the heat of the boiler blow-down water is fully recycled, the water inlet temperature of the deaerator is increased, and the energy is saved;
2) through setting up circulating line and running water mixing unit, guaranteed that the temperature after the boiler blow-down water cooling can reach below 50 ℃, satisfy the emission requirement, have higher reliability, and easy and simple to handle.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
the notation in the figure is:
1-continuous blowdown expander, 2-blowdown cooling pond, 3-boiler blow-down water pipeline, 4-intermediate water tank, 5-heat exchanger, 6-demineralized water inlet pipe, 7-demineralized water outlet pipe, 8-electric flow control valve, 9-first thermometer, 10-circulating pipeline, 11-first electromagnetic three-way valve, 12-second electromagnetic three-way valve, 13-bypass pipeline, 14-mixing tank, 15-tap water pipeline, 16-second thermometer, 17-high temperature water pump.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example (b):
as shown in fig. 1, the device for reducing the temperature of boiler blow-down water comprises a continuous blow-down expander 1, a blow-down cooling tank 2, a boiler blow-down water pipe 3 arranged between the continuous blow-down expander 1 and the blow-down cooling tank 2, a softened water heat exchange unit arranged on the boiler blow-down water pipe 3, and an intermediate water tank 4 communicated with the softened water heat exchange unit. The device also comprises a controller electrically connected with the softened water heat exchange unit. The controller is a PLC controller.
The softened water heat exchange unit comprises a heat exchanger 5 arranged on the boiler sewage discharge pipeline 3, a softened water inlet pipeline 6 and a softened water outlet pipeline 7, the softened water inlet pipeline 6 is communicated with the softened water outlet pipeline 7 through the heat exchanger 5, and the intermediate water tank 4 is communicated with one end of the softened water outlet pipeline 7. An electric flow control valve 8 is arranged on the softened water inlet pipe 6, and the electric flow control valve 8 is electrically connected with the controller. The boiler blow-down pipe 3 is provided with a first thermometer 9 electrically connected to the controller, which first thermometer 9 is located downstream of the heat exchanger 5.
The demineralized water heat exchange unit further comprises a circulation conduit 10, both ends of the circulation conduit 10 being in communication with the boiler blow-down conduit 3, and the outlet end of the circulation conduit 10 being located upstream of the heat exchanger 5 and the inlet end being located downstream of the first thermometer 9. The boiler blow-down pipe 3 is provided with a first three-way solenoid valve 11 electrically connected to the controller, the first three-way solenoid valve 11 being located downstream of the first thermometer 9, and the inlet end of the circulation pipe 10 being connected to the first three-way solenoid valve 11.
The softened water heat exchange unit further comprises a tap water mixing unit, the tap water mixing unit comprises a second electromagnetic three-way valve 12 arranged on the boiler sewage draining pipeline 3 and electrically connected with the controller, a bypass pipeline 13 and a mixing tank 14 arranged on the bypass pipeline 13, the second electromagnetic three-way valve 12 is positioned between a first electromagnetic three-way valve 11 and the sewage discharging and cooling pool 2, the inlet end of the bypass pipeline 13 is connected with the second electromagnetic three-way valve 12, the outlet end of the bypass pipeline is connected with the sewage discharging and cooling pool 2, a tap water pipeline 15 is arranged on the mixing tank 14, and a second thermometer 16 electrically connected with the controller is arranged in the mixing tank 14. The boiler sewage draining pipeline 3 is provided with a high-temperature water pump 17.
In practical application, boiler sewage in the boiler sewage discharge pipeline 3 exchanges heat with softened water in the softened water heat exchange unit to reduce the temperature, and the boiler sewage is discharged into the sewage discharge and temperature reduction pool 2 after reaching the standard of below 50 ℃; meanwhile, softened water in the softened water heat exchange unit enters the intermediate water tank 4 after being subjected to heat exchange and temperature rise, and is used as boiler water supplement.
The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention according to the disclosure of the present invention.
Claims (10)
1. The utility model provides a reduce device of boiler blow-down water temperature which characterized in that, the device includes continuous blowdown expander (1), blowdown cooling pond (2), sets up boiler blow-down water pipeline (3) between continuous blowdown expander (1) and blowdown cooling pond (2), sets up demineralized water heat transfer unit on boiler blow-down water pipeline (3) and middle water tank (4) that are linked together with demineralized water heat transfer unit.
2. The apparatus for lowering the temperature of boiler blow-down water according to claim 1, further comprising a controller electrically connected to the softened water heat exchange unit.
3. The apparatus for lowering the temperature of boiler blow-down water according to claim 2, wherein said controller is a PLC controller.
4. The device for reducing the temperature of boiler blow-down water according to claim 2, characterized in that the softened water heat exchange unit comprises a heat exchanger (5) arranged on the boiler blow-down water pipe (3), a softened water inlet pipe (6) and a softened water outlet pipe (7), the softened water inlet pipe (6) is communicated with the softened water outlet pipe (7) through the heat exchanger (5), and the intermediate water tank (4) is communicated with one end of the softened water outlet pipe (7).
5. The device for reducing the temperature of the boiler blow-down water according to the claim 4 is characterized in that the inlet pipe (6) of the softened water is provided with an electric flow control valve (8), and the electric flow control valve (8) is electrically connected with the controller.
6. An apparatus for lowering the temperature of boiler blow-down water according to claim 4, characterized in that the boiler blow-down water conduit (3) is provided with a first thermometer (9) electrically connected to the controller, the first thermometer (9) being located downstream of the heat exchanger (5).
7. An apparatus for lowering the temperature of boiler blow-down water according to claim 6, characterized in that the demineralized water heat exchange unit further comprises a circulation pipe (10), both ends of the circulation pipe (10) being in communication with the boiler blow-down water pipe (3), and the outlet end of the circulation pipe (10) being located upstream of the heat exchanger (5) and the inlet end being located downstream of the first thermometer (9).
8. An apparatus for lowering the temperature of boiler blow-down water according to claim 7, characterized in that said boiler blow-down water pipe (3) is provided with a first three-way solenoid valve (11) electrically connected to the controller, said first three-way solenoid valve (11) being located downstream of the first thermometer (9), and the inlet end of said circulation pipe (10) being connected to the first three-way solenoid valve (11).
9. The apparatus for lowering temperature of boiler blow-down water according to claim 8, wherein said softened water heat exchange unit further comprises a tap water mixing unit, the tap water mixing unit comprises a second electromagnetic three-way valve (12) which is arranged on the boiler sewage discharge pipeline (3) and is electrically connected with the controller, a bypass pipeline (13) and a mixing tank (14) which is arranged on the bypass pipeline (13), the second electromagnetic three-way valve (12) is positioned between the first electromagnetic three-way valve (11) and the sewage discharging and cooling pool (2), the inlet end of the bypass pipeline (13) is connected with the second electromagnetic three-way valve (12), the outlet end is connected with the pollution discharge cooling pool (2), a tap water pipeline (15) is arranged on the mixing tank (14), and a second thermometer (16) electrically connected with the controller is arranged in the mixing tank (14).
10. The apparatus for lowering the temperature of boiler blow-down water according to claim 1, characterized in that the boiler blow-down water pipe (3) is provided with a high temperature water pump (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022014256.1U CN213066079U (en) | 2020-09-15 | 2020-09-15 | Device for reducing temperature of boiler blow-down water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022014256.1U CN213066079U (en) | 2020-09-15 | 2020-09-15 | Device for reducing temperature of boiler blow-down water |
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| Publication Number | Publication Date |
|---|---|
| CN213066079U true CN213066079U (en) | 2021-04-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022014256.1U Active CN213066079U (en) | 2020-09-15 | 2020-09-15 | Device for reducing temperature of boiler blow-down water |
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|---|---|
| CN (1) | CN213066079U (en) |
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- 2020-09-15 CN CN202022014256.1U patent/CN213066079U/en active Active
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