CN220817722U - Boiler blowdown waste heat utilization equipment - Google Patents
Boiler blowdown waste heat utilization equipment Download PDFInfo
- Publication number
- CN220817722U CN220817722U CN202322494834.XU CN202322494834U CN220817722U CN 220817722 U CN220817722 U CN 220817722U CN 202322494834 U CN202322494834 U CN 202322494834U CN 220817722 U CN220817722 U CN 220817722U
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- water
- sewage
- boiler
- tank
- liquid level
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- 239000002918 waste heat Substances 0.000 title claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 86
- 239000010865 sewage Substances 0.000 claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 32
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 238000001704 evaporation Methods 0.000 claims abstract description 12
- 230000008020 evaporation Effects 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 2
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model provides a boiler blow-down waste heat utilization device, wherein boiler blow-down water obtained after flash evaporation of a flash evaporation tank is discharged through a blow-down pipeline, a water pump is arranged on the blow-down pipeline, a liquid level meter is arranged on a tank body and used for detecting the liquid level of the boiler blow-down water in the tank, and the detection position is positioned at the middle upper part of the tank body; the water-water heat exchanger is used for heat exchange between softened water and boiler sewage; the water-water heat exchanger is connected with a sewage drain pipe, receives the boiler sewage discharged from the flash tank through the sewage drain pipe, and outputs the boiler sewage after heat exchange to the sewage drain cooling tank through a first water outlet pipe provided with a temperature sensor; the water-water heat exchanger receives softened water to be heated through a softened water input pipeline provided with an electric regulating valve, and outputs softened water subjected to heat exchange through a softened water output pipeline; the device also comprises a PLC control cabinet, and the liquid level meter, the water pump, the temperature sensor and the electric regulating valve are respectively connected into the PLC control cabinet and controlled by the PLC. The utility model reduces pollution discharge heat loss and water resource consumption, and has remarkable energy-saving effect.
Description
Technical Field
The utility model relates to a boiler blow-down waste heat utilization device.
Background
At present, the boiler has 5 to 8 percent of pollution discharge heat loss, the sewage is high-salt high-temperature water, the sewage is discharged into a pollution discharge cooling pool, and the pollution discharge cooling pool is cooled by using cold water, so that a large amount of cooling water is consumed, and the boiler is unreasonable. The main expression is as follows:
1. The temperature of the sewage hot water is very high, high-quality heat energy is contained, and the heat loss in the sewage hot water is relatively large;
2. Cooling consumes more cooling water.
The two reasons lead to low effective utilization rate of energy sources in actual production, and cause low thermal efficiency of the boiler system and waste of energy sources and water resources.
Disclosure of utility model
In order to solve the technical problems, the utility model provides the boiler blow-down waste heat utilization device which reasonably recycles the boiler blow-down waste heat, reduces the blow-down heat loss and the water resource consumption and has obvious energy saving effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A boiler blowdown waste heat utilization device, its structural feature is:
The flash tank is used for receiving the boiler sewage, exhaust steam generated by flash evaporation is discharged through a steam port on the tank top and is used for heating the deoxidizing water tank, the boiler sewage after flash evaporation is discharged through a sewage pipe externally connected with a sewage outlet on the tank bottom, a water pump is arranged on the sewage pipe, a liquid level meter is arranged on the tank body and is used for detecting the liquid level of the boiler sewage in the tank, and the detection position is positioned at the middle upper part of the tank body;
The water-water heat exchanger is used for heat exchange between softened water and boiler sewage; the water-water heat exchanger is connected with a sewage drain pipe, receives the boiler sewage discharged from the flash tank through the sewage drain pipe, and outputs the boiler sewage after heat exchange to the sewage drain cooling tank through a first water outlet pipe provided with a temperature sensor; the water-water heat exchanger receives softened water to be heated through a softened water input pipeline provided with an electric regulating valve, and outputs softened water subjected to heat exchange through a softened water output pipeline;
The device also comprises a PLC control cabinet, and the liquid level meter, the water pump, the temperature sensor and the electric regulating valve are respectively connected into the PLC control cabinet and controlled by the PLC.
The utility model is also characterized in that:
in the first water outlet pipeline, the water temperature of the boiler sewage after heat exchange of the water-water heat exchanger is not higher than 40 ℃.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model effectively recycles the waste heat of the boiler blow-down, and simultaneously saves two types of consumption, one type of consumption is the consumption of cooling water for cooling the high-temperature boiler blow-down water directly discharged into the blow-down cooling pool by using cold water in the prior art, and the other type is the consumption of heat energy for heating softened water. The heat exchange is carried out between the high-temperature boiler sewage after flash evaporation and the softened water to be heated through the water-water heat exchanger, so that the softened water is heated while the boiler sewage is cooled, thereby realizing reasonable recycling of the waste heat of the boiler sewage and saving energy and water resources.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of the control principle of the PLC;
fig. 3 is a schematic diagram of the control principle of the PLC extension module.
In the figure, 1a flash tank; 2 steam port; 3, a sewage drain pipe; 4, a water pump; 5, a liquid level meter; 6 a water-water heat exchanger; 7, a temperature sensor; 8, a first water outlet pipeline; 9, an electric regulating valve; 10 demineralized water input conduit; 11 a softened water output pipe; 12PLC control cabinet.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be clearly and completely described in the following in conjunction with the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1, the structure of the boiler blow-down waste heat utilization device of the present embodiment is as follows:
The flash tank 1 is used for receiving boiler sewage, exhaust steam generated by flash evaporation is discharged through a tank top steam port 2 and used as a heating heat source of a deaerator for heating a deaeration water tank, the boiler sewage after flash evaporation is discharged through a sewage discharge pipeline 3 externally connected with a tank bottom sewage discharge port, a water pump 4 is arranged on the sewage discharge pipeline 3, a liquid level meter 5 is arranged on the tank body and used for detecting the liquid level of the boiler sewage in the tank, and a detection position is positioned at the middle upper part of the tank body;
The water-water heat exchanger 6 is used for heat exchange between softened water and boiler blow-down water; the water-water heat exchanger 6 is connected with the sewage drain pipeline 3, receives the boiler sewage discharged from the flash tank 1 through the sewage drain pipeline 3, and outputs the boiler sewage after heat exchange to the sewage drain cooling tank through the first water outlet pipeline 8 provided with the temperature sensor 7; the water-water heat exchanger 6 receives softened water to be heated through a softened water input pipeline 10 provided with an electric regulating valve 9, and outputs softened water subjected to heat exchange through a softened water output pipeline 11;
The device also comprises a PLC control cabinet 12, and the liquid level meter 5, the water pump 4, the temperature sensor 7 and the electric regulating valve 9 are respectively connected into the PLC control cabinet 12 and controlled by the PLC. The liquid level meter 5 collects liquid level signals and feeds the liquid level signals back to the PLC, the PLC controls the water pump 4 to be started according to the received liquid level signals, boiler sewage in the flash tank 1 is discharged into the water-water heat exchanger 6 through the sewage pipeline 3 until the liquid level in the flash tank 1 is lower than the detection position of the liquid level meter 5, the liquid level meter 5 has no liquid level signals, and the PLC controls the water pump 4 to be closed. The temperature sensor 7 is used for detecting the temperature of the boiler blow-down water after heat exchange, feeding back the detected temperature value to the PLC, analyzing and comparing the received temperature value with a preset temperature value by the PLC, and controlling the opening of the electric regulating valve 9 according to the analysis and comparison result to regulate the flow of the softened water input pipeline 10, as shown in fig. 2 and 3.
In FIG. 3, 1PIT+/1 PIT-is the signal of the temperature sensor 7, 1PIL+/1 PIL-is the signal of the liquid level meter 5, 2PIF+/2 PIF-is the valve position feedback signal of the electric control valve 9, and 1PQF+/1 PQF-is the control signal of the electric control valve 9.
In a specific implementation, the corresponding structure arrangement also includes:
in the first water outlet pipeline 8, the water temperature of the boiler sewage after heat exchange by the water-water heat exchanger 6 is not higher than 40 ℃, namely the preset temperature value is 40 ℃. When the temperature value detected by the temperature sensor 7 is higher than 40 ℃, the PLC controls the electric regulating valve 9 to increase the opening, increases the input flow of softened water, is used for cooling the boiler sewage, and controls the electric regulating valve 9 to restore the original opening until the temperature value detected by the temperature sensor 7 is not higher than 40 ℃.
The implementation process can be referred to as follows:
The flash tank 1 is utilized to decompress and flash the high-salt-concentration boiler waste water, the exhaust steam generated after the flash evaporation is used for heating the deoxidizing water tank, and the flash-evaporated boiler waste water (concentrated high-temperature brine) enters the water-water heat exchanger 6 to exchange heat with softened water;
The boiler sewage after flash evaporation is pressurized by a water pump 4 and pumped into a water-water heat exchanger 6. When the liquid level in the flash tank 1 reaches or is higher than the detection position of the liquid level meter 5, the liquid level meter 5 detects a liquid level signal and feeds back to the PLC, the PLC receives the liquid level signal, controls the water pump 4 to be started, pumps the boiler drain water subjected to flash evaporation in the flash tank 1 into the water-water heat exchanger 6 through the sewage pipeline 3 by the water pump 4, performs heat exchange with the softened water input into the water-water heat exchanger 6 through the softened water input pipeline 10, heats the softened water, cools the boiler drain water, and the softened water subjected to heat exchange is output through the softened water output pipeline 11 for boiler water supplementing, and the boiler drain water subjected to heat exchange is discharged to the sewage cooling pool through the first water outlet pipeline 8; when the liquid level in the flash tank 1 is lower than the detection level of the liquid level meter 5, the liquid level meter 5 has no liquid level signal, and the PLC controls the water pump 4 to be turned off;
In the heat exchange process, the temperature sensor 7 on the first water outlet pipeline 8 is utilized to detect the liquid temperature in the first water outlet pipeline 8 in real time, namely, the water temperature of the boiler sewage after heat exchange is fed back to the PLC, the PLC compares the received temperature value with a preset temperature value for analysis, when the temperature value exceeds the preset temperature value, the PLC controls the electric regulating valve 9 to increase the opening degree so as to increase the flow of the softened water input pipeline 10, so that the boiler sewage entering the water-water heat exchanger 6 is further cooled until the temperature value detected by the temperature sensor 7 is reduced below the preset temperature value, and the PLC controls the electric regulating valve 9 to restore to the original opening degree.
While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. A boiler blowdown waste heat utilization device, characterized by:
The flash tank is used for receiving the boiler sewage, exhaust steam generated by flash evaporation is discharged through a steam port on the tank top and is used for heating the deoxidizing water tank, the boiler sewage after flash evaporation is discharged through a sewage pipe externally connected with a sewage outlet on the tank bottom, a water pump is arranged on the sewage pipe, a liquid level meter is arranged on the tank body and is used for detecting the liquid level of the boiler sewage in the tank, and the detection position is positioned at the middle upper part of the tank body;
The water-water heat exchanger is used for heat exchange between softened water and boiler sewage; the water-water heat exchanger is connected with a sewage drain pipe, receives the boiler sewage discharged from the flash tank through the sewage drain pipe, and outputs the boiler sewage after heat exchange to the sewage drain cooling tank through a first water outlet pipe provided with a temperature sensor; the water-water heat exchanger receives softened water to be heated through a softened water input pipeline provided with an electric regulating valve, and outputs softened water subjected to heat exchange through a softened water output pipeline;
The device also comprises a PLC control cabinet, and the liquid level meter, the water pump, the temperature sensor and the electric regulating valve are respectively connected into the PLC control cabinet and controlled by the PLC.
2. The boiler blow-down waste heat utilization device according to claim 1, characterized in that: in the first water outlet pipeline, the water temperature of the boiler sewage after heat exchange of the water-water heat exchanger is not higher than 40 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322494834.XU CN220817722U (en) | 2023-09-14 | 2023-09-14 | Boiler blowdown waste heat utilization equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322494834.XU CN220817722U (en) | 2023-09-14 | 2023-09-14 | Boiler blowdown waste heat utilization equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220817722U true CN220817722U (en) | 2024-04-19 |
Family
ID=90698937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322494834.XU Active CN220817722U (en) | 2023-09-14 | 2023-09-14 | Boiler blowdown waste heat utilization equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220817722U (en) |
-
2023
- 2023-09-14 CN CN202322494834.XU patent/CN220817722U/en active Active
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