CN222651345U - A waste heat recovery system for waste heat boiler sewage - Google Patents
A waste heat recovery system for waste heat boiler sewage Download PDFInfo
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- CN222651345U CN222651345U CN202420686779.6U CN202420686779U CN222651345U CN 222651345 U CN222651345 U CN 222651345U CN 202420686779 U CN202420686779 U CN 202420686779U CN 222651345 U CN222651345 U CN 222651345U
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- water
- waste heat
- condensate
- pipe
- recovery
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- 239000002918 waste heat Substances 0.000 title claims abstract description 96
- 238000011084 recovery Methods 0.000 title claims abstract description 94
- 239000010865 sewage Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 165
- 238000003860 storage Methods 0.000 claims abstract description 44
- 238000004064 recycling Methods 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims description 37
- 239000002351 wastewater Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims 1
- 239000002699 waste material Substances 0.000 abstract description 7
- 239000012535 impurity Substances 0.000 abstract description 6
- 238000001704 evaporation Methods 0.000 abstract description 5
- 230000008020 evaporation Effects 0.000 abstract description 5
- 238000001556 precipitation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003657 drainage water Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000012824 chemical production Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
本实用新型公开了一种废热锅炉排污水的废热回收系统，包括废热锅炉、排污水管、机组冷凝液储罐、冷凝液进液管、换热器、回收水管、回收水槽、回收水泵、冷凝液送出管和冷凝液储槽；本实用新型利用机组冷凝液降低废热锅炉排污水温度并回收热量，经换热器换热后，机组冷凝液温度升高可以经冷凝液槽送除氧器并经泵加压后作为废热锅炉给水，废锅排污水温度降低，经回收水泵加压后送入循环水管网回收利用，回收水槽周围现场环境得到明显改善，同时降低了循环水用量及循环回水温度，避免循环回水温度升高带来的蒸发消耗，同时彻底抛弃了常规的膨胀闪蒸思维，避免水中杂质析出结垢堵塞管线设备。
The utility model discloses a waste heat recovery system for waste heat boiler sewage, comprising a waste heat boiler, a sewage pipe, a unit condensate storage tank, a condensate inlet pipe, a heat exchanger, a recovery water pipe, a recovery water tank, a recovery water pump, a condensate delivery pipe and a condensate storage tank; the utility model utilizes the unit condensate to reduce the waste heat boiler sewage temperature and recover heat, after heat exchange in the heat exchanger, the unit condensate temperature increases and can be sent to a deaerator through a condensate tank and pressurized by a pump as waste heat boiler feed water, the waste boiler sewage temperature is reduced, and after pressurized by a recovery water pump, it is sent to a circulating water network for recycling, the on-site environment around the recovery water tank is significantly improved, and at the same time, the circulating water consumption and circulating return water temperature are reduced, and evaporation consumption caused by the increase in circulating return water temperature is avoided, and at the same time, the conventional expansion flash evaporation thinking is completely abandoned to avoid the precipitation of impurities in the water and scaling and clogging of pipeline equipment.
Description
Technical Field
The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery system for waste heat boiler exhaust water.
Background
The waste heat boiler is a boiler for generating steam by using waste heat in a chemical production process. The waste heat boiler is a high-temperature high-pressure device for producing power steam as the common power boiler, and is different in heat source, and the waste heat boiler utilizes waste heat of process gas in the chemical production process, so that the waste heat boiler is a high-energy recovery device and chemical medium process equipment. Because the feed water entering the waste heat boiler always has a certain salt content, after the chemical adding treatment is carried out in the waste heat boiler, the scaling substances of the furnace water are converted into water slag, and in addition, the furnace water corrodes metals to generate some corrosion products. Therefore, various soluble and insoluble impurities are contained in the furnace water, and in the operation of the waste heat boiler, only a small part of the impurities are taken away by steam, and most of the impurities remain in the furnace water, and the concentration of the impurities is gradually increased along with the continuous evaporation of the furnace water, so that the steam quality is affected, and the scaling and corrosion of a heating surface can be caused to influence the safe operation of the waste heat boiler.
In order to control the quality of the furnace water, waste heat boiler blow down must be performed in order to drain part of the furnace water contaminated with salt and water slag and recycle it to the circulating water for use. The sewage of the existing waste boiler is directly discharged and recycled, and as shown in the following figure, the sewage of the waste boiler enters a sewage discharge expansion tank, is sprayed and cooled by circulating water at the top of the expansion tank, enters a recycling water tank, is pressurized by a recycling water pump, and is sent into the circulating water for recycling. Because the waste pan sewage temperature is too high, the circulating water is utilized to spray and cool in the expansion tank, scaling is very easy to form, the spray nozzle is blocked, the scaling of the equipment pipeline is serious, the waste pan sewage temperature cannot be reduced, the field emission is increased, the water consumption is increased, the recovery water pump is easy to damage, and potential safety hazards are caused for field operators.
Therefore, it is necessary to develop a device which is not easy to scale, can reduce the temperature of the waste water discharged from the waste heat boiler, can recover the heat of the waste water discharged, and can reduce the water consumption.
Disclosure of utility model
The utility model aims to provide a waste heat recovery system for waste heat boiler sewage, which aims to solve the problem that scaling and blockage are easily formed when the temperature is lowered by spraying in an expansion tank.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
a waste heat recovery system for waste heat boiler blow-down water, the waste heat recovery system comprising:
a waste heat boiler;
a drain pipe having both ends connected to the waste heat boiler and the heat exchanger, respectively, for feeding drain water of the waste heat boiler into the heat exchanger;
The unit condensate storage tank is used for storing unit condensate;
The two ends of the condensate liquid inlet pipe are respectively connected with a unit condensate liquid storage tank and the heat exchanger and are used for conveying the unit condensate liquid into the heat exchanger;
The heat exchanger is used for carrying out heat exchange and cooling on the sewage from the sewage draining pipe by utilizing the unit condensate from the unit condensate liquid inlet pipe;
the two ends of the recovery water pipe are respectively connected to the heat exchanger and the recovery water tank and are used for conveying the sewage subjected to heat exchange and temperature reduction into the recovery water tank;
a recovery water tank for receiving recovery water from the recovery water pipe;
The recovery water pump is used for pressurizing the recovery water in the recovery water tank and then sending the pressurized recovery water into a circulating water pipe network for recovery and utilization;
A condensate delivery pipe with two ends respectively connected to the heat exchanger and the condensate storage tank for delivering the machine set condensate after heat exchange and temperature rise into the condensate storage tank, and
And the condensate storage tank is used for receiving condensate from the condensate delivery pipe as water storage for recycling.
According to the waste heat recovery system of the present utility model, preferably, the waste heat recovery system further includes a deaerator connected to the condensate tank and the waste heat boiler, respectively, for deaerating water in the condensate tank to serve as feed water for the waste heat boiler.
According to the waste heat recovery system of the present utility model, preferably, the waste heat recovery system further includes a water feed pump provided between the deaerator and the waste heat boiler, for pressurizing the water treated by the deaerator to serve as the waste heat boiler water feed.
According to the waste heat recovery system of the present utility model, preferably, the waste heat recovery system further comprises a desalted water storage tank and a desalted water inlet pipe, wherein both ends of the desalted water inlet pipe are respectively connected to the desalted water storage tank and the heat exchanger, and the desalted water from the desalted water storage tank is sent to the heat exchanger to exchange heat with the sewage water for heating.
According to the waste heat recovery system of the present utility model, preferably, the heat exchanger is a shell-and-tube heat exchanger.
According to the waste heat recovery system of the present utility model, preferably, the drain pipe is connected to a shell side of the heat exchanger, and the condensate feed pipe and the desalted water feed pipe are connected to a tube side of the heat exchanger.
According to the waste heat recovery system of the present utility model, preferably, the condensate liquid inlet pipe and the desalted water liquid inlet pipe are respectively provided with a shut-off valve so as to switch the water source entering the tube side of the heat exchanger.
According to the waste heat recovery system, the waste heat boiler comprises a boiler body and a boiler tube arranged in the boiler body, wherein the boiler tube is used for conveying a heat source, the boiler body is used for receiving boiler feed water to exchange heat and recover waste heat of the heat source in the boiler tube, and the connection ends of the sewage drainage tube and the waste heat boiler are connected to the waste heat boiler body and the boiler tube through a first branch tube and a second branch tube respectively.
According to the waste heat recovery system of the present utility model, preferably, the first branch pipe and the second branch pipe are provided with a manual valve and an automatic control valve.
According to the waste heat recovery system of the present utility model, preferably, the recovery water pump and the water feed pump each employ a centrifugal pump.
Compared with the prior art, the utility model has the following advantages:
The utility model utilizes the unit condensate to reduce the temperature of the waste heat boiler sewage and recycle heat, after heat exchange by a heat exchanger, the temperature of the unit condensate is increased, the unit condensate can be sent to the deaerator through the condensate tank and pressurized by the pump to serve as the water supply of the waste heat boiler, the temperature of the waste boiler sewage is reduced, the waste boiler sewage is sent to the circulating water pipe network for recycling after being pressurized by the recycling water pump, the field environment around the recycling water tank is obviously improved, the consumption of the circulating water and the temperature of the circulating backwater are reduced, the evaporation consumption caused by the temperature increase of the circulating backwater is avoided, and meanwhile, the conventional expansion flash evaporation thinking is thoroughly abandoned, and the impurity precipitation in the water is avoided, scaling and pipeline blocking equipment are avoided.
Drawings
FIG. 1 is a schematic diagram of one embodiment of a waste heat recovery system of the present utility model;
reference numerals illustrate:
1-waste heat boiler, 2-sewage drain pipe, 3-unit condensate storage tank, 4-condensate liquid inlet pipe, 5-heat exchanger, 6-recovery water pipe, 7-recovery water tank, 8-recovery water pump, 9-condensate liquid delivery pipe, 10-condensate liquid storage tank, 11-deaerator, 12-water supply pump, 13-desalted water storage tank, 14-desalted water inlet pipe, 15-first branch pipe and 16-second branch pipe.
Detailed Description
In order that those skilled in the art will better understand the present utility model, a technical solution in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Embodiments of the utility model and features of the embodiments may be combined with each other without conflict.
As shown in fig. 1, in one embodiment, the waste heat recovery system of the utility model comprises a waste heat boiler 1, a sewage drain pipe 2, a unit condensate storage tank 3, a condensate liquid inlet pipe 4, a heat exchanger 5, a recovery water pipe 6, a recovery water tank 7, a recovery water pump 8, a condensate liquid outlet pipe 9 and a condensate storage tank 10, wherein the waste heat boiler 1 is well known in the art and comprises a furnace body and a furnace tube arranged in the furnace body, wherein the furnace tube is used for conveying a heat source, and the furnace body is used for receiving boiler feed water to exchange heat and recover waste heat of the heat source in the furnace tube.
The two ends of the drainage pipe 2 are respectively connected to the waste heat boiler 1 and the heat exchanger 5 and used for conveying drainage water of the waste heat boiler to the heat exchanger, the unit condensate storage tank 3 is used for storing unit condensate, two ends of the condensate liquid inlet pipe 4 are respectively connected to the unit condensate storage tank and the heat exchanger and used for conveying the unit condensate to the heat exchanger, the heat exchanger 5 is used for carrying out heat exchange and cooling on the drainage water from the drainage pipe by using the unit condensate from the unit condensate liquid inlet pipe, two ends of the recovery water pipe 6 are respectively connected to the heat exchanger and the recovery water tank and used for conveying the drainage water subjected to heat exchange and cooling to the recovery water tank, the recovery water tank 7 is used for receiving the recovery water from the recovery water pipe, the recovery water pump 8 is used for pressurizing the recovery water in the recovery water tank and then conveying the recovery water pipe network to be recycled, two ends of the condensate conveying pipe 9 are respectively connected to the heat exchanger and the condensate liquid, the unit condensate liquid after heat exchange and temperature rise is used for conveying the condensate liquid to the condensate liquid storage tank, and the condensate liquid is used for receiving the condensate liquid from the water storage tank and the recovery water storage tank to be used for recovery condensate liquid.
In a preferred embodiment, the connection ends of the sewage draining pipe 2 and the waste heat boiler 1 are respectively connected to the waste heat boiler body and the furnace tube through a first branch pipe 15 and a second branch pipe 16, that is, sewage in the furnace body is sent into the sewage draining pipe through the first branch pipe, sewage in the furnace tube is sent into the sewage draining pipe through the second branch pipe, and preferably, both the first branch pipe and the second branch pipe are provided with a manual valve and an automatic control valve so as to facilitate control and switching.
In another embodiment, the waste heat recovery system comprises a waste heat boiler 1, a waste water discharge pipe 2, a unit condensate storage tank 3, a condensate liquid inlet pipe 4, a heat exchanger 5, a recovery water pipe 6, a recovery water tank 7, a recovery water pump 8, a condensate liquid outlet pipe 9, a condensate storage tank 10, a deaerator 11, a water supply pump 12, a desalted water storage tank 13 and a desalted water inlet pipe 14, wherein two ends of the waste water discharge pipe 2 are respectively connected to the waste heat boiler and the heat exchanger and used for conveying waste water of the waste heat boiler to the heat exchanger, the unit condensate storage tank 3 is used for storing unit condensate, two ends of the condensate liquid inlet pipe 4 are respectively connected to the unit condensate storage tank and the heat exchanger and used for conveying the unit condensate to the heat exchanger, two ends of the desalted water inlet pipe 14 are respectively connected to the desalted water storage tank 13 and the heat exchanger and used for conveying desalted water from the desalted water storage tank to the heat exchanger and heat-exchanging and heating the waste water, and a cut-off valve is respectively arranged on the water inlet pipe 4 and the condensate liquid inlet pipe 14 so as to enter the heat exchanger.
The heat exchanger 5 is used for carrying out heat exchange and cooling on the sewage from the sewage pipe 2 by utilizing the unit condensate from the unit condensate liquid inlet pipe 4 or the desalted water from the desalted water inlet pipe 14, two ends of the recovery water pipe 6 are respectively connected to the heat exchanger and the recovery water tank and used for sending the sewage subjected to heat exchange and cooling to the recovery water tank, the recovery water tank 7 is used for receiving the recovered water from the recovery water pipe, the recovery water pump 8 is used for pressurizing the recovered water in the recovery water tank and sending the pressurized water to a circulating water pipe network for recycling, two ends of the condensate delivery pipe 9 are respectively connected to the heat exchanger and the condensate liquid, and used for sending the unit condensate subjected to heat exchange and heating to the condensate liquid storage tank, the condensate liquid storage tank 10 is used for receiving the condensate liquid from the condensate liquid delivery pipe and taking the condensate liquid as a water storage tank for recycling, the deaerator 11 is respectively connected to the condensate liquid tank and the waste heat boiler and used for deoxidizing the water in the condensate liquid tank and taking the deoxidized water as the water for the boiler, the pump 12 is arranged between the deaerator the boiler and the water after being treated by the pressurization of the waste heat pump and the water pump 8 and the water pump is used for recycling the water pump 12.
In some embodiments, the heat exchanger 5 is a shell-and-tube heat exchanger and the drain pipe 2 is connected to the shell side of the heat exchanger, and the condensate feed pipe 4 and the desalted water feed pipe 14 are connected to the tube side of the heat exchanger.
When the waste heat boiler is operated, the sewage in the boiler body and/or the boiler tube of the waste heat boiler is sent into the shell side of a heat exchanger through a sewage pipe, desalted water from a desalted water storage tank or machine set condensate from a machine set condensate storage tank is respectively sent into the tube side of the heat exchanger through a desalted water inlet pipe or a condensate inlet pipe as cold source water, in the heat exchanger, the sewage exchanges heat with the cold source and is cooled, the cooled sewage is sent into a recycling water tank through the recycling water pipe, then is pressurized by the recycling water pump and is sent into a circulating water pipe network for recycling, cold source water after heat exchange and temperature rise is sent into a condensate storage tank through a condensate sending pipe, then water stored in the condensate storage tank is processed by a deaerator, and the water processed by the deaerator is pressurized by the water feeding pump and is used as water for the waste heat boiler.
Of course, those skilled in the art will appreciate that other meters and/or valves, etc. may be provided as needed in the system of the present utility model, such as an on-line temperature and/or pressure sensing meter, etc. for clarity and conciseness of the schematic diagram of fig. 1, some of the devices have been omitted from the diagram, but this will not affect the understanding of the present utility model.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solution described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not deviate the essence of the corresponding technical solution from the scope of the technical solution of the embodiments of the present utility model.
Claims (10)
1. A waste heat recovery system for waste heat boiler blow-down water, the waste heat recovery system comprising:
a waste heat boiler;
a drain pipe having both ends connected to the waste heat boiler and the heat exchanger, respectively, for feeding drain water of the waste heat boiler into the heat exchanger;
The unit condensate storage tank is used for storing unit condensate;
The two ends of the condensate liquid inlet pipe are respectively connected with a unit condensate liquid storage tank and the heat exchanger and are used for conveying the unit condensate liquid into the heat exchanger;
The heat exchanger is used for carrying out heat exchange and cooling on the sewage from the sewage draining pipe by utilizing the unit condensate from the unit condensate liquid inlet pipe;
the two ends of the recovery water pipe are respectively connected to the heat exchanger and the recovery water tank and are used for conveying the sewage subjected to heat exchange and temperature reduction into the recovery water tank;
a recovery water tank for receiving recovery water from the recovery water pipe;
The recovery water pump is used for pressurizing the recovery water in the recovery water tank and then sending the pressurized recovery water into a circulating water pipe network for recovery and utilization;
A condensate delivery pipe with two ends respectively connected to the heat exchanger and the condensate storage tank for delivering the machine set condensate after heat exchange and temperature rise into the condensate storage tank, and
And the condensate storage tank is used for receiving condensate from the condensate delivery pipe as water storage for recycling.
2. The waste heat recovery system of claim 1, further comprising a deaerator connected to the condensate reservoir and the waste heat boiler, respectively, for deaerating water in the condensate reservoir as waste heat boiler feedwater.
3. The waste heat recovery system of claim 2, further comprising a feed pump disposed between the deaerator and the waste heat boiler for pressurizing the water treated by the deaerator as waste heat boiler feed water.
4. The waste heat recovery system of claim 3, further comprising a desalinated water storage tank and a desalinated water feed pipe, both ends of the desalinated water feed pipe being connected to the desalinated water storage tank and the heat exchanger, respectively, for feeding desalinated water from the desalinated water storage tank to the heat exchanger for heat exchange and warming with the sewage.
5. The waste heat recovery system of claim 4, wherein the heat exchanger is a shell-and-tube heat exchanger.
6. The waste heat recovery system of claim 5, wherein the drain pipe is connected to a shell side of the heat exchanger, and the condensate feed pipe and the desalted water feed pipe are connected to a tube side of the heat exchanger.
7. The waste heat recovery system of claim 6, wherein shut-off valves are provided on the condensate feed pipe and the desalted water feed pipe, respectively, to switch the water source to the heat exchanger tube side.
8. The waste heat recovery system of claim 7, wherein the waste heat boiler comprises a furnace and a furnace disposed within the furnace, wherein the furnace is configured to deliver a heat source, wherein the furnace is configured to receive boiler feedwater for heat exchange recovery of waste heat from the heat source within the furnace, and wherein the connection ends of the waste water pipe and the waste heat boiler are connected to the waste heat boiler furnace and the furnace via a first branch pipe and a second branch pipe, respectively.
9. The waste heat recovery system of claim 8, wherein the first branch pipe and the second branch pipe are each provided with a manual valve and a self-controlled valve.
10. The waste heat recovery system of claim 9, wherein the recovery water pump and the feedwater pump each employ a centrifugal pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420686779.6U CN222651345U (en) | 2024-04-03 | 2024-04-03 | A waste heat recovery system for waste heat boiler sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420686779.6U CN222651345U (en) | 2024-04-03 | 2024-04-03 | A waste heat recovery system for waste heat boiler sewage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222651345U true CN222651345U (en) | 2025-03-21 |
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ID=95008582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202420686779.6U Active CN222651345U (en) | 2024-04-03 | 2024-04-03 | A waste heat recovery system for waste heat boiler sewage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222651345U (en) |
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2024
- 2024-04-03 CN CN202420686779.6U patent/CN222651345U/en active Active
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