CN113979497A - Method for lifting water by using waste heat and waste water of boiler - Google Patents
Method for lifting water by using waste heat and waste water of boiler Download PDFInfo
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- CN113979497A CN113979497A CN202110597146.9A CN202110597146A CN113979497A CN 113979497 A CN113979497 A CN 113979497A CN 202110597146 A CN202110597146 A CN 202110597146A CN 113979497 A CN113979497 A CN 113979497A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Abstract
The invention discloses a method for lifting water by using waste heat and waste water of a boiler, which comprises the following steps: step S1: detecting the concentration of soluble total solids in the circulating water, and heating the circulating water to a first preset temperature when the concentration of the soluble total solids is lower than a preset concentration; step S2: inputting the heated circulating water into a flash tank, and gasifying the circulating water; step S3: heating the wastewater by using water vapor generated after gasification, and heating the wastewater to a second preset temperature; step S4: inputting the wastewater heated to the second preset temperature into a water lifting tank, and gasifying the wastewater in the water lifting tank; step S5: cooling water vapor generated by gasifying the waste water to be in a liquid state and collecting the water vapor; step S6: recovering the non-gasified part of the wastewater. The flue heat exchanger is used for recovering a flue gas heat source at the tail part of the boiler to heat circulating water, and water molecules in the wastewater are extracted with ultralow energy consumption under the action of the vacuum pump by utilizing the physical characteristics of saturated vapor pressure corresponding to different temperatures of water, so that the wastewater is recycled.
Description
Technical Field
The invention relates to the technical field of waste water resource utilization, in particular to a method for lifting water by using waste heat and waste water of a boiler.
Background
Recently, ten departments such as national development and improvement committee jointly issue guidance opinions about promoting sewage resource utilization, and the like, and definitely propose that sewage resource utilization is systematically developed in the fields of cities and towns, industry, agricultural rural areas and the like, and the water-deficient area and the water environment sensitive area are taken as key points, and industrial utilization and ecological water supplement are taken as main ways, so that the sewage resource utilization of China is promoted to realize high-quality development. The guidance suggestion has important significance for promoting the resource utilization of sewage and improving the utilization efficiency of water resources.
The sewage is used as a second water resource, has the advantages of stable water quantity, controllable water quality, availability nearby and the like, and has great development and utilization potential. The sewage resource utilization is actively promoted, the contradiction between water supply and demand can be relieved, the water pollution can be reduced, the water ecological safety is recovered, the method is a powerful measure for promoting the green transformation of the economic society of China, and the method has great significance for realizing high-quality development and constructing new development patterns. However, in the actual situation, an effective method for recycling sewage is lacked, and particularly, a method for extracting water by using waste heat and waste water of a boiler is lacked, so that the development of waste water utilization is limited.
Disclosure of Invention
In view of the above, the present invention provides a method for extracting water by using waste heat and waste water of a boiler, so as to at least partially solve the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for lifting water by using waste heat and waste water of a boiler comprises the following steps:
step S1: detecting the concentration of soluble total solids in the circulating water, and heating the circulating water to a first preset temperature when the concentration of the soluble total solids is lower than a preset concentration;
step S2: inputting the heated circulating water into a flash tank, and gasifying the circulating water;
step S3: heating the wastewater by using water vapor generated after gasification, and heating the wastewater to a second preset temperature;
step S4: inputting the wastewater heated to the second preset temperature into a water lifting tank, and gasifying the wastewater in the water lifting tank;
step S5: cooling water vapor generated by gasifying the waste water to be in a liquid state and collecting the water vapor;
step S6: recovering the non-gasified part of the wastewater.
Further, in step S1, the circulating water having a soluble total solids concentration of less than 1000mg/L is sent to the flue heat exchanger, and the circulating water is heated to 90 ℃ in the flue heat exchanger.
Further, in step S1, circulating water is delivered to the flue heat exchanger by a centrifugal pump.
Further, in step S2, the heated circulating water is introduced into a flash tank, and the absolute pressure in the tank is adjusted to 0.07Mpa by a vacuum pump so that the circulating water boils and is converted into steam.
Further, in step S3, the water vapor enters a heat exchanger to exchange heat with the circulating wastewater, the wastewater is heated to 50 ℃ by latent heat released by liquefaction, and the cooled circulating water enters a circulating water collection tank to prepare for the next closed cycle.
Further, in step S3, the heat exchanger is a tube-in-tube heat exchanger, wherein the water vapor flows through a shell side of the tube-in-tube heat exchanger, and the wastewater flows through a tube side of the tube-in-tube heat exchanger.
Further, in step S4, the waste water after heat exchange enters a water extraction tank, and under the action of a vacuum pump, the absolute pressure in the tank is 0.012Mpa, and the waste water starts to boil and is converted into a gaseous state.
Further, in step S4, the wastewater flows out from the bottom of the water lift tank, and is conveyed to the heat exchanger for cyclic heat exchange under the action of the axial flow pump.
Further, in step S5, the gasified waste water enters the intercooler in the form of steam, is liquefied into purified water under the action of the cooling water, and flows into the purified water collection box, so that the resource utilization of the waste water is realized.
Further, in step S6, the unevaporated wastewater is concentrated and reduced in amount and discharged.
Compared with the prior art, the invention has the following beneficial effects: the flue heat exchanger is used for recovering a flue gas heat source at the tail part of the boiler to heat circulating water, water molecules in the wastewater are extracted with ultralow energy consumption under the action of a vacuum pump by utilizing the physical characteristics of saturated vapor pressure corresponding to different temperatures of water, the TDS of the recovered purified water is less than or equal to 10mg/L and higher than the quality of reverse osmosis produced water, and the recovery and utilization of second water resources are really realized.
Drawings
FIG. 1 is a flow chart of a method for extracting water by using waste heat and waste water of a boiler provided by the invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
It should be noted that, in the case of no conflict, the features in the following embodiments and examples may be combined with each other; moreover, all other embodiments that can be derived by one of ordinary skill in the art from the embodiments disclosed herein without making any creative effort fall within the scope of the present disclosure.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the disclosure, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
In one embodiment, as shown in fig. 1, the method for extracting water by using waste heat of a boiler provided by the invention comprises the following steps:
step S1: and detecting the concentration of soluble total solids in the circulating water, and heating the circulating water to a first preset temperature when the concentration of the soluble total solids is lower than a preset concentration. Specifically, circulating water having a total soluble solids concentration of less than 1000mg/L is delivered to a flue heat exchanger, and the circulating water is heated to 90 ℃ in the flue heat exchanger. Wherein, the circulating water is conveyed to the flue heat exchanger through a centrifugal pump. In the specific implementation, the circulating water is lifted by a centrifugal pump to convey power to a flue heat exchanger for heating, and in order to prevent hardening, the TDS of the circulating water is less than or equal to 1000 mg/L.
Specifically, in step S1, the total soluble solid concentration in the circulating water is assayed, the circulating water is heated, the total soluble solid concentration in the circulating water is detected by a constant temperature oven and a balance, the circulating water is conveyed by a centrifugal pump for heating, and the material of a flue heat exchanger is NG steel.
Step S2: inputting the heated circulating water into a flash tank, and gasifying the circulating water; the heated circulating water enters a flash tank, and the absolute pressure in the flash tank is adjusted to be 0.07Mpa by a vacuum pump, so that the circulating water is boiled and converted into steam.
That is, step S2 is a process of gasifying the circulating water, the temperature of the heated circulating water reaches 90 ℃, the pressure is 0.07MPa under the action of the vacuum pump, the circulating water starts boiling and gasifying under the condition, the latent heat of the water vapor is 2200KJ/kg, and the heat energy is completely provided by the waste heat of the flue gas at the tail of the boiler.
Step S3: heating the wastewater by using water vapor generated after gasification, and heating the wastewater to a second preset temperature; the water vapor enters the heat exchanger to exchange heat with the circulating wastewater, the wastewater is heated to 50 ℃ by utilizing latent heat released by liquefaction, and the cooled circulating water enters the circulating water collecting box to prepare for the next closed circulation. The heat exchanger is a tubular heat exchanger, water vapor passes through a shell pass in the tubular heat exchanger, and wastewater passes through a tube pass in the tubular heat exchanger.
That is, step S3 is a process of heating wastewater, the wastewater flows out from the bottom of the water lift tank, enters the tube side of the heat exchanger by the action of the axial flow circulating pump, the circulating water vapor enters the shell side of the heat exchanger, liquefies after contacting with the wastewater to release 2200KJ/kg of latent heat, and the latent heat is all absorbed and heated by the wastewater and then returns to the water lift tank.
Step S4: inputting the wastewater heated to the second preset temperature into a water lifting tank, and gasifying the wastewater in the water lifting tank; the waste water after heat exchange enters a water extraction tank, the absolute pressure in the tank is 0.012Mpa under the action of a vacuum pump, and the waste water begins to boil and is converted into a gaseous state. Wherein, the waste water flows out from the bottom of the water lifting tank and is conveyed to the heat exchanger for circulating heat exchange under the action of the axial flow pump.
That is, step S4 is a water extraction process, the heated wastewater enters the water extraction tank, the temperature is 50 ℃, the pressure is 0.012MPa, the wastewater is boiled and gasified under the condition, the soluble total solid and suspended matter in the wastewater does not reach the gasification condition, and water molecules begin to separate from the wastewater in the process.
Step S5: cooling the gasified waste water vapor, and collecting liquefied clean water; the gasified waste water enters the intercooler in the form of steam, is liquefied into purified water under the action of cooling water, and flows into the purified water collecting box, so that the resource utilization of the waste water is realized.
That is, step S5 is a process of collecting and recovering the extracted water, water molecules in the wastewater are converted into gaseous state, enter the shell side of the intercooler, contact with the cooling water of the tube side to be liquefied into purified water, and flow into the purified water tank, wherein the total water solubility solid is less than or equal to 10 mg/L.
Step S6: recovering the un-gasified part of the waste water, and discharging the un-evaporated waste water after concentration and decrement. Step S6 is a concentrated solution discharge process, the total soluble solid concentration in the wastewater is gradually increased along with the water lifting process, the salt content of the wastewater is less than 25% according to the invention, and the wastewater is discharged to a wastewater zero-discharge system for treatment at regular time.
Compared with the prior art, the invention has the following beneficial effects: the flue heat exchanger is used for recovering a flue gas heat source at the tail part of the boiler to heat circulating water, water molecules in the wastewater are extracted with ultralow energy consumption under the action of a vacuum pump by utilizing the physical characteristics of saturated vapor pressure corresponding to different temperatures of water, the TDS of the recovered purified water is less than or equal to 10mg/L and higher than the quality of reverse osmosis produced water, and the recovery and utilization of second water resources are really realized. Through above-mentioned embodiment, utilize boiler afterbody flue gas waste heat recovery to provide the required whole heat energy of water lift, through the physical characteristics of water gasification, liquefaction, realize the separation of hydrone and other materials, successfully realize the recycle of second water resource. Meanwhile, concentrated wastewater is treated by combining a wastewater zero discharge technology, so that the possibility of generating pollutants is avoided. Compared with the traditional membrane method wastewater recycling technology such as reverse osmosis, the scheme does not need to add softening agent, has low requirement on the turbidity of the wastewater, and can be used as the make-up water of a boiler, wherein the TDS of the treated wastewater is less than or equal to 10 mg/L. The product concentrated wastewater is generated, zero discharge is realized by combining a zero discharge technology, and the process method is simple, low in energy consumption, stable in operation and easy for realizing industrial application.
For further explanation, the method for extracting water by using waste heat and waste water of a boiler according to the present invention will be described in further detail with reference to three specific examples.
Example 1
20t of circulating water is added into the circulating water tank, and the total soluble solid in the circulating water is detected to be 865 mg/L.
The initial temperature of the circulating water is 30 ℃, and the circulating water is 560m under the action of the circulating pump3The flow/h flows into a flue heat exchanger, and the temperature of the heated circulating water reaches 90.2 ℃.
The heated circulating water enters a flash tank, the pressure in the flash tank is 0.068MPa, the evaporation capacity of the circulating water is 0.65t/h, and the temperature of water vapor is 89.9 ℃ under the action of a vacuum pump.
The steam enters the shell side of the heat exchanger, the inlet is the steam with the temperature of 89.9 ℃, and the outlet is hot water with the temperature of 72.4 ℃. The tube pass of the heat exchanger is wastewater, and the circulating temperature is controlled at 49.6 ℃.
The operation pressure in the water lifting tank is 0.012MPa, the operation temperature is 49.6, and the flow of the circulating pump is 210m3The evaporation capacity of the waste water was 0.6 t/h.
The evaporated waste water enters the shell side of the intercooler, and is liquefied into clean water at 48.6 ℃ under the action of circulating water and flows into a clean water tank. The circulation volume of cooling water is 100m3H, inlet temperature 25.1 ℃ and outletThe mouth temperature was 29.8 ℃.
The detected TDS of the collected clean water is 9.7mg/L, the water extraction amount of the waste water is 0.6t/h, the water supplement amount is 0.8t/h, the recovery rate is 75%, the water supplement TDS is 19800mg/L, the water discharge amount is 0.2t/h, and the water discharge TDS is 78900 mg/L.
Example 2
20t of circulating water is added into the circulating water tank, and the total soluble solid in the circulating water is detected to be 958 mg/L.
The initial temperature of the circulating water is 35 ℃, and the circulating water is 680m under the action of the circulating pump3The flow rate per hour flows into a flue heat exchanger, and the temperature of the heated circulating water reaches 89.9 ℃.
The heated circulating water enters a flash tank, the pressure in the flash tank is 0.07MPa, the evaporation capacity of the circulating water is 0.8t/h, and the temperature of water vapor is 89.9 ℃ under the action of a vacuum pump.
The steam enters the shell side of the heat exchanger, the inlet is the steam with the temperature of 89.9 ℃, and the outlet is hot water with the temperature of 75.6 ℃. The tube pass of the heat exchanger is wastewater, and the circulating temperature is controlled at 49.7 ℃.
The operation pressure in the water lifting tank is 0.012MPa, the operation temperature is 49.7, and the flow of the circulating pump is 250m3The evaporation capacity of the waste water was 0.7 t/h.
The evaporated waste water enters the shell side of the intercooler, and is liquefied into clean water at 48.6 ℃ under the action of circulating water and flows into a clean water tank. The circulation volume of cooling water is 105m3The inlet temperature was 25.1 ℃ and the outlet temperature was 30.2 ℃.
The detected TDS of the collected clean water is 9.5mg/L, the water extraction amount of the waste water is 0.7t/h, the water supplement amount is 0.94t/h, the recovery rate is 74.5%, the water supplement TDS is 17800mg/L, the water discharge amount is 0.24t/h, and the water discharge TDS is 69500 mg/L.
Example 3
20t of circulating water is added into the circulating water tank, and 695mg/L of soluble total solids in the circulating water is detected.
The initial temperature of the circulating water is 33 ℃, and the circulating water is heated to 850m under the action of the circulating pump3The flow/h flows into a flue heat exchanger, and the temperature of the heated circulating water reaches 90 ℃.
The heated circulating water enters a flash tank, the pressure in the flash tank is 0.07MPa, the evaporation capacity of the circulating water is 1t/h, and the temperature of water vapor is 89.9 ℃ under the action of a vacuum pump.
The steam enters the shell side of the heat exchanger, the inlet is the steam with the temperature of 90 ℃, and the outlet is hot water with the temperature of 69.8 ℃. The tube pass of the heat exchanger is wastewater, and the circulating temperature is controlled at 50 ℃.
The operation pressure in the water lifting tank is 0.012MPa, the operation temperature is 50, and the flow rate of the circulating pump is 290m3The evaporation capacity of the waste water was 0.9 t/h.
The evaporated waste water enters the shell side of the intercooler, and is liquefied into clean water at 48.6 ℃ under the action of circulating water and flows into a clean water tank. The cooling water circulation volume is 1103The inlet temperature was 25.1 ℃ and the outlet temperature was 30.1 ℃ per hour.
The detected TDS of the collected clean water is 8.9mg/L, the water extraction amount of the waste water is 0.9t/h, the water supplement amount is 1.2t/h, the recovery rate is 75%, the water supplement TDS is 7900mg/L, the water discharge amount is 0.3t/h, and the water discharge TDS is 31600 mg/L.
In any of the above embodiments, preferably, the TDS of the circulating water is not greater than 1000mg/L, the delivery pump is a high-lift centrifugal pump, and the impeller is made of SS304 stainless steel.
In any of the above embodiments, preferably, the flash tank is made of SS304 stainless steel.
In any of the above embodiments, preferably, the heat exchanger tube-side is 2205 duplex steel and the shell-side is SS304 stainless steel.
In any of the above embodiments, preferably, the water lifting tank is 2205 dual-phase steel, and the matched circulating pump is an axial flow pump.
In any of the above embodiments, preferably, the material of the intercooler pipe is SS304 stainless steel, and a cooling water tower and a cooling water circulating pump are required to be matched.
In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention have been described in detail, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
Claims (10)
1. A method for lifting water by using waste heat and waste water of a boiler is characterized by comprising the following steps:
step S1: detecting the concentration of soluble total solids in the circulating water, and heating the circulating water to a first preset temperature when the concentration of the soluble total solids is lower than a preset concentration;
step S2: inputting the heated circulating water into a flash tank, and gasifying the circulating water;
step S3: heating the wastewater by using water vapor generated after gasification, and heating the wastewater to a second preset temperature;
step S4: inputting the wastewater heated to the second preset temperature into a water lifting tank, and gasifying the wastewater in the water lifting tank;
step S5: cooling water vapor generated by gasifying the waste water to be in a liquid state and collecting the water vapor;
step S6: recovering the non-gasified part of the wastewater.
2. The method for extracting water by using waste water of boiler waste heat according to claim 1,
in step S1, the circulating water with the total soluble solid concentration lower than 1000mg/L is conveyed to a flue heat exchanger, and the circulating water is heated to 90 ℃ in the flue heat exchanger.
3. The method for lifting water by using waste water of boiler waste heat according to claim 2,
in step S1, the circulating water is delivered to the flue heat exchanger by a centrifugal pump.
4. The method for lifting water by using waste water of boiler waste heat according to claim 1,
in step S2, the heated circulating water enters a flash tank, and the absolute pressure in the tank is adjusted to 0.07Mpa by a vacuum pump, so that the circulating water boils and is converted into steam.
5. The method for lifting water by using waste water of boiler waste heat according to claim 1,
in step S3, the vapor enters a heat exchanger to exchange heat with the circulating wastewater, the wastewater is heated to 50 ℃ by latent heat released by liquefaction, and the cooled circulating water enters a circulating water collection box to prepare for the next closed circulation.
6. The method for lifting water by using waste water of boiler waste heat according to claim 5,
in step S3, the heat exchanger is a shell-and-tube heat exchanger, wherein the water vapor flows through a shell pass of the shell-and-tube heat exchanger, and the wastewater flows through a tube pass of the shell-and-tube heat exchanger.
7. The method for lifting water by using waste water of boiler waste heat according to claim 1,
in step S4, the waste water after heat exchange enters a water extraction tank, and under the action of a vacuum pump, the absolute pressure in the tank is 0.012Mpa, and the waste water starts to boil and is converted into a gaseous state.
8. The method for lifting water by using waste water of boiler waste heat according to claim 7,
in step S4, the wastewater flows out from the bottom of the water lift tank and is conveyed to the heat exchanger for cyclic heat exchange under the action of the axial flow pump.
9. The method for lifting water by using waste water of boiler waste heat according to claim 1,
in step S5, the gasified waste water enters the intercooler in the form of steam, is liquefied into purified water under the action of cooling water, and flows into the purified water collection box, thereby realizing resource utilization of the waste water.
10. The method for lifting water by using waste water of boiler waste heat according to claim 1,
in step S6, the unevaporated wastewater is concentrated and reduced in weight and discharged.
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| CN106745435A (en) * | 2017-01-17 | 2017-05-31 | 北京清新环境技术股份有限公司 | One kind realizes desulfurization wastewater Zero discharging system using fume afterheat |
| CN107324426A (en) * | 2017-08-08 | 2017-11-07 | 北京尤科恩环保工程有限公司 | A kind of residual heat from boiler fume coupling evaporation concentrates desulfurization wastewater system |
| CN108411052A (en) * | 2018-02-27 | 2018-08-17 | 首钢京唐钢铁联合有限责任公司 | A kind of low grade residual heat recovery system |
| CN108386827A (en) * | 2018-04-06 | 2018-08-10 | 无锡诚尔鑫环保装备科技有限公司 | A kind of steam generation facility and its application method using waste heat |
| CN112125463A (en) * | 2020-10-14 | 2020-12-25 | 青岛润扬环境科技有限公司 | Power plant variable load coal-fired boiler desulfurization wastewater zero discharge system |
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