Heat supply device for triple-effect flash evaporation of desulfurization wastewater

Abstract

The utility model provides a heat supply device for desulfurization wastewater triple-effect flash evaporation, and relates to the technical field of desulfurization wastewater treatment. The heat supply device for desulfurization wastewater triple-effect flash evaporation comprises a heat storage tank, a heat supply system and a heat supply system, the first heating assembly is connected with the heat storage tank and is used for heating a heat storage medium in the heat storage tank by utilizing the flue gas waste heat; the auxiliary heating assembly is connected with the heat storage tank and used for heating the heat storage medium in the heat storage tank through steam from the boiler. And the thermodetector is used for detecting the temperature of the heat storage medium in the heat storage tank. According to the heat supply device for triple-effect flash evaporation of the desulfurization wastewater, the heat source for heating the heat storage medium is enriched, it is ensured that the heat storage medium can supply heat stably all the time as the heat source for concentrating the desulfurization wastewater, and the problem that in the prior art, heat supply needed for concentration of the desulfurization wastewater is not stable is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization wastewater treatment, in particular to a heating device for triple-effect flash evaporation of desulfurization wastewater. Background Art

[0002] Desulfurization wastewater is the most difficult end-of-line wastewater to treat in coal-fired power plants. Currently, a variety of zero-emission technologies are available for desulfurization wastewater treatment in coal-fired power plants, generally employing a two-stage process: concentration and reduction followed by drying. The most common process in the concentration stage is triple-effect flash evaporation, which involves introducing a specific heat source into the desulfurization wastewater concentration and evaporation system, utilizing the flash evaporation technology to achieve progressive utilization of the heat source energy.

[0003] To reduce energy consumption, flue gas heat is used to heat water to generate steam or high-temperature water (which then passes through a flash tank to generate steam) as a heat source. However, the quality of this heat source is significantly affected by boiler load. When the boiler load is low, the flue gas temperature generated by boiler combustion is lower than normal, and the flue gas volume is small, resulting in the flue heat exchanger being unable to generate heat source steam that meets the required standards.

[0004] Therefore, there is an urgent need for a device that can solve at least one of the above problems. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a heating device for triple-effect flash evaporation of desulfurized wastewater, which is used to solve the problem of unstable heating required for desulfurized wastewater concentration in the prior art.

[0006] In order to achieve the above-mentioned object, the utility model provides a heating device for triple-effect flash evaporation of desulfurized wastewater, the heating device for triple-effect flash evaporation of desulfurized wastewater comprising:

[0007] The heat storage tank is used to store heat storage medium;

[0008] a first heating component connected to the heat storage tank and used to heat the heat storage medium in the heat storage tank using the waste heat of the flue gas;

[0009] an auxiliary heating component connected to the heat storage tank and used to heat the heat storage medium in the heat storage tank using steam from the boiler;

[0010] Thermometer, used to detect the temperature of the heat storage medium in the heat storage tank.

[0011] Specifically, the first heating component includes: a flue heat exchanger and a first circulation pump;

[0012] The flue heat exchanger has a flue gas inlet, a flue gas outlet, a first water inlet, and a first water outlet; the first water outlet of the flue heat exchanger is connected to the water inlet of the heat storage tank via a return water pipe, and the first water inlet of the flue heat exchanger is connected to the water outlet of the heat storage tank 1 via a water inlet pipe; the flue gas entering the flue heat exchanger from the flue gas inlet exchanges heat with the heat storage medium discharged from the heat storage tank through the water inlet pipe and the first water inlet and entering the flue heat exchanger; the heated heat storage medium is discharged from the first water outlet of the flue heat exchanger and then re-enters the heat storage tank through the return water pipe;

[0013] The first circulation pump is arranged on the water inlet pipe and is used to pump the heat storage medium in the heat storage tank into the flue heat exchanger.

[0014] Specifically, the auxiliary heating assembly includes: a steam heat exchanger, an auxiliary regulating valve and a drain pipe;

[0015] The steam heat exchanger has a steam inlet and a steam outlet. The steam heat exchanger is arranged in the heat storage tank. The steam inlet is connected to the steam outlet of the boiler via a steam inlet pipe, and the steam outlet is connected to the water inlet of the heat storage tank via a drain discharge pipe. The steam heat exchanger uses the steam supplied by the boiler to exchange heat with the heat storage medium in the heat storage tank. The steam after losing heat becomes drain, and the drain is sent into the heat storage tank as the heat storage medium via the drain discharge pipe.

[0016] The auxiliary regulating valve is arranged on the steam inlet pipeline and is used to regulate the flow of steam entering the steam heat exchanger.

[0017] Specifically, the auxiliary heating component further includes: a drain valve, which is arranged on the drain discharge pipeline.

[0018] Specifically, the auxiliary heating assembly further includes: a first one-way valve, which is arranged on the drain pipe.

[0019] Specifically, the heating device for triple-effect flash evaporation of desulfurized wastewater further includes a display arranged on the heat storage tank, which is connected to the temperature measuring instrument signal and is used to display the temperature of the heat storage medium.

[0020] Specifically, the heating device for triple-effect flash evaporation of desulfurization wastewater further includes: a photovoltaic heating component connected to the heat storage tank, which is used to convert light energy into heat energy to heat the heat storage medium in the heat storage tank.

[0021] Specifically, the photovoltaic heating assembly includes: a photovoltaic heater;

[0022] The photovoltaic water inlet of the photovoltaic heater is connected to the water outlet of the heat storage tank through a photovoltaic water inlet pipe, and the water outlet of the photovoltaic heater is connected to the water inlet of the heat storage tank through a photovoltaic return pipe. The photovoltaic heater is used to convert light energy into heat energy. The heat storage medium in the heat storage tank enters the photovoltaic heater through the photovoltaic water inlet pipe to absorb heat energy and then heat up. The heated heat storage medium returns to the heat storage tank again through the photovoltaic return pipe.

[0023] Specifically, the photovoltaic heating assembly further includes: a circulating water pump, which is arranged on the photovoltaic water inlet pipe and is used to pump the heat storage medium in the heat storage tank into the photovoltaic heater.

[0024] Specifically, a second one-way valve is provided on the photovoltaic return water pipe.

[0025] The utility model provides a heating device for triple-effect flash evaporation of desulfurized wastewater, in which a heat storage medium is stored, and the heat storage medium in the heat storage tank is heated by a first heating component using waste heat from flue gas. The heat storage medium is stored in the heat storage tank after being heated, and an auxiliary heating component is also provided, in which the steam from the boiler is used to heat the heat storage medium in the heat storage tank. In this way, the heat source for heating the heat storage medium is enriched, ensuring that the heat storage medium can always provide stable heat as a heat source for concentrating desulfurized wastewater, thereby solving the problem of unstable heat supply required for concentrating desulfurized wastewater in the prior art.

[0026] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present invention, but do not constitute a limitation of the embodiments of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a schematic diagram of the layout of a heating device for triple-effect flash evaporation of desulfurization wastewater provided by an embodiment of the present utility model.

[0029] Description of Reference Numerals

[0030] 1-heat storage tank; 2-first heating component; 3-auxiliary heating component; 4-thermometer; 5-photovoltaic heating component; 21-flue heat exchanger; 22-first circulation pump; 31-steam heat exchanger; 32-auxiliary regulating valve; 33-drain discharge pipeline; 34-drain valve; 35-first one-way valve; 51-photovoltaic heater; 52-circulating water pump; 53-second one-way valve. DETAILED DESCRIPTION

[0031] The following describes the specific implementation of the embodiment of the present invention in detail with reference to the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the embodiment of the present invention and is not intended to limit the embodiment of the present invention.

[0032] Figure 1 This is a schematic diagram of the layout of the heating device for the three-effect flash evaporation of desulfurization wastewater. Figure 1 As shown, the utility model provides a heating device for triple-effect flash evaporation of desulfurized wastewater, and the heating device for triple-effect flash evaporation of desulfurized wastewater includes:

[0033] Heat storage tank 1, used for storing heat storage medium;

[0034] The first heating component 2 is connected to the heat storage tank 1 and is used to heat the heat storage medium in the heat storage tank 1 using the waste heat of the flue gas;

[0035] an auxiliary heating assembly 3 connected to the heat storage tank 1 and configured to heat the heat storage medium in the heat storage tank 1 using steam from the boiler;

[0036] The thermometer 4 is used to detect the temperature of the heat storage medium in the heat storage tank 1.

[0037] The utility model provides a heating device for triple-effect flash evaporation of desulfurization waste, wherein a heat storage tank 1 is provided to store a heat storage medium, and the heat storage medium in the heat storage tank is heated by a first heating component 2 and an auxiliary heating component 3. The heat storage medium is liquid water, and the first heating component 2 utilizes the waste heat of flue gas to heat the heat storage medium in the heat storage tank 1, and the auxiliary heating component 3 utilizes the steam of the boiler to heat the heat storage medium in the heat storage tank 1, thereby enriching the heat source for heating the heat storage medium. The temperature of the heat storage medium in the heat storage tank 1 is detected by a thermometer 4, so that it is convenient for the staff to know the temperature of the heat storage medium in the heat storage tank 1 in a timely manner, and can also adjust the first heating component 2 or the auxiliary heating component 3 to insulate the heat storage medium according to the temperature of the heat storage medium, so as to ensure that the heat storage medium can always be maintained in the set temperature range, so that the heat storage medium can always maintain a stable heat supply as a heat source for desulfurization wastewater concentration, thereby solving the problem of unstable heat supply required for desulfurization wastewater concentration in the prior art.

[0038] In one embodiment, Figure 1 As shown, specifically, the first heating component 2 includes: a flue heat exchanger 21 and a first circulation pump 22;

[0039] The flue heat exchanger 21 has a flue gas inlet, a flue gas outlet, a first water inlet, and a first water outlet; the first water outlet of the flue heat exchanger 21 is connected to the water inlet of the heat storage tank 1 via a return water pipe, and the first water inlet of the flue heat exchanger 21 is connected to the water outlet of the heat storage tank 1 via a water inlet pipe; the flue gas entering the flue heat exchanger 21 from the flue gas inlet exchanges heat with the heat storage medium discharged from the heat storage tank 1 and entering the flue heat exchanger 21 through the water inlet pipe and the first water inlet, so that the heat storage medium is heated by the waste heat of the flue gas. The heated heat storage medium is discharged from the first water outlet of the flue heat exchanger 21 and then re-enters the heat storage tank 1 through the return water pipe;

[0040] The first circulation pump 22 is provided on the water inlet pipe and is used to pump the heat storage medium in the heat storage tank 1 into the flue heat exchanger 21 .

[0041] The flue gas enters the flue heat exchanger 21 from the flue gas inlet of the flue heat exchanger 21, and the heat storage medium flows out from the water outlet of the heat storage tank 1 and enters the flue heat exchanger 21 through the water inlet pipe. The heat storage medium and the flue gas exchange heat in the flue heat exchanger 21. After the heat exchange, the temperature of the heat storage medium increases. The heated heat storage medium flows out from the first water outlet of the flue heat exchanger 21 and returns to the heat storage tank 1 again through the return water pipe. In this way, the heat storage medium in the heat storage tank 1 continuously enters the flue heat exchanger 21 to absorb the heat of the flue gas, so that the temperature of the heat storage medium in the entire heat storage tank 1 is increased.

[0042] In order to enrich the heat source for heating the heat storage medium, the auxiliary heating component 3 includes: a steam heat exchanger 31, an auxiliary regulating valve 32 and a drain pipe 33;

[0043] The steam heat exchanger 31 has a steam inlet and a steam outlet. The steam heat exchanger 31 is arranged in the heat storage tank 1. The steam inlet is connected to the steam outlet of the boiler via a steam inlet pipe, and the steam outlet is connected to the water inlet of the heat storage tank 1 via a drain discharge pipe 33. The steam heat exchanger 31 uses the steam supplied by the boiler to exchange heat with the heat storage medium in the heat storage tank 1. After losing heat, the steam becomes drain, which is then fed into the heat storage tank 1 via the drain discharge pipe 33 as a heat storage medium.

[0044] The auxiliary regulating valve 32 is provided on the steam inlet pipe and is used to regulate the flow of steam entering the steam heat exchanger 31 .

[0045] The auxiliary heating assembly 3 further includes a drain valve 34 , which is arranged on the drain discharge pipeline 33 .

[0046] The auxiliary heating assembly 3 further includes a first one-way valve 35 , which is disposed on the drain pipe 33 .

[0047] The steam heat exchanger 31 is arranged in the heat storage tank 1. The steam inlet of the steam heat exchanger 31 is connected to the steam outlet of the boiler through the steam inlet pipe. The steam discharged from the boiler enters the steam heat exchanger 31 from the steam inlet pipe. The heat storage medium exchanges heat with the steam entering the steam heat exchanger 31. The temperature of the heat storage medium rises after absorbing the heat of the steam. After the thermometer 4 detects the temperature of the heat storage medium in the heat storage tank 1, the staff can adjust the auxiliary regulating valve 32 according to the temperature of the heat storage medium to adjust the flow rate of the steam entering the steam heat exchanger 31. After losing heat, the steam becomes drain and is discharged from the steam outlet. The drain can be used as a replenished heat storage medium and then enters the heat storage tank 1 from the water inlet of the heat storage tank 1 through the drain discharge pipeline 33. In order to control the discharge speed of the drain on the drain discharge pipeline 33, a drain valve 34 is provided on the drain discharge pipeline 33. At the same time, a first one-way valve 35 is also provided on the drain discharge pipeline 33. The flow direction of the drain is controlled by the first one-way valve 35 to prevent the drain entering the heat storage tank 1 from flowing back in the drain discharge pipeline 33.

[0048] In order to facilitate the staff to know the temperature of the heat storage medium in time, the desulfurization wastewater triple-effect flash evaporation heating device also includes a display arranged on the heat storage tank 1, which is connected to the temperature meter 4 for displaying the temperature of the heat storage medium.

[0049] In another embodiment, Figure 1 As shown, the heating device for triple-effect flash evaporation of desulfurization wastewater further includes: a photovoltaic heating component 5 connected to the heat storage tank 1, for converting light energy into heat energy to heat the heat storage medium in the heat storage tank 1.

[0050] The photovoltaic heating assembly 5 includes: a photovoltaic heater 51;

[0051] The photovoltaic water inlet of the photovoltaic heater 51 is connected to the water outlet of the heat storage tank 1 through a photovoltaic water inlet pipe, and the water outlet of the photovoltaic heater 51 is connected to the water inlet of the heat storage tank 1 through a photovoltaic return water pipe. The photovoltaic heater 51 is used to convert light energy into heat energy. The heat storage medium in the heat storage tank 1 enters the photovoltaic heater 51 through the photovoltaic water inlet pipe to absorb heat energy and then heat up. The heated heat storage medium returns to the heat storage tank 1 again through the photovoltaic return water pipe.

[0052] The photovoltaic heating assembly 5 further includes: a circulating water pump 52 , which is arranged on the photovoltaic water inlet pipe and is used to pump the heat storage medium in the heat storage tank 1 into the photovoltaic heater 51 .

[0053] A second one-way valve 53 is provided on the photovoltaic return water pipe.

[0054] In order to save energy, Figure 1As shown, a photovoltaic heating component 5 is provided, and light energy is converted into heat energy through a photovoltaic heater 51. A circulating water pump 52 pumps the heat storage medium in the heat storage tank 1 into the photovoltaic heater 51. The heat storage medium absorbs the heat energy converted from light energy. After the heat storage medium is heated, it returns to the heat storage tank 1 through the photovoltaic return pipe. The second one-way valve 53 provided can prevent the heat storage medium in the heat storage tank 1 from flowing back into the photovoltaic heater 51.

[0055] The utility model provides a heating device for triple-effect flash evaporation of desulfurized wastewater, in which a heat storage medium is stored, and the heat storage medium in the heat storage tank is heated by a first heating component using waste heat from flue gas. The heat storage medium is stored in the heat storage tank after being heated, and an auxiliary heating component is also provided, in which the steam from the boiler is used to heat the heat storage medium in the heat storage tank. In this way, the heat source for heating the heat storage medium is enriched, ensuring that the heat storage medium can always provide stable heat as a heat source for concentrating desulfurized wastewater, thereby solving the problem of unstable heat supply required for concentrating desulfurized wastewater in the prior art.

[0056] The above describes in detail the optional implementation methods of the embodiment of the present invention in conjunction with the accompanying drawings. However, the embodiment of the present invention is not limited to the specific details in the above implementation methods. Within the technical concept of the embodiment of the present invention, the technical solution of the embodiment of the present invention can be subjected to various simple modifications, and these simple modifications all fall within the protection scope of the embodiment of the present invention.

[0057] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. To avoid unnecessary repetition, the embodiments of the present utility model will not further describe various possible combinations.

[0058] In addition, the various implementations of the embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims

1. A heating device for triple-effect flash evaporation of desulfurized wastewater, characterized in that: The heating device for triple-effect flash evaporation of desulfurized wastewater comprises: A heat storage tank (1) for storing a heat storage medium; A first heating component (2) is connected to the heat storage tank (1) and is used to heat the heat storage medium in the heat storage tank (1) using waste heat from the flue gas; An auxiliary heating component (3) is connected to the heat storage tank (1) and is used to heat the heat storage medium in the heat storage tank (1) using steam from the boiler; The thermometer (4) is used to detect the temperature of the heat storage medium in the heat storage tank (1).

2. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 1, characterized in that: The first heating component (2) comprises: a flue heat exchanger (21) and a first circulation pump (22); The flue heat exchanger (21) has a flue gas inlet, a flue gas outlet, a first water inlet, and a first water outlet; the first water outlet of the flue heat exchanger (21) is connected to the water inlet of the heat storage tank (1) via a return water pipe, and the first water inlet of the flue heat exchanger (21) is connected to the water outlet of the heat storage tank (1) via a water inlet pipe; the flue gas entering the flue heat exchanger (21) from the flue gas inlet exchanges heat with the heat storage medium discharged from the heat storage tank (1) and entering the flue heat exchanger (21) via the water inlet pipe and the first water inlet, and the heated heat storage medium is discharged from the first water outlet of the flue heat exchanger (21) and then re-enters the heat storage tank (1) via the return water pipe; The first circulation pump (22) is arranged on the water inlet pipe and is used to pump the heat storage medium in the heat storage tank (1) into the flue heat exchanger (21).

3. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 1, characterized in that: The auxiliary heating assembly (3) comprises: a steam heat exchanger (31), an auxiliary regulating valve (32) and a drain pipe (33); The steam heat exchanger (31) has a steam inlet and a steam outlet. The steam heat exchanger (31) is arranged in the heat storage tank (1). The steam inlet is connected to the steam outlet of the boiler via a steam inlet pipe, and the steam outlet is connected to the water inlet of the heat storage tank (1) via a drain discharge pipe (33). The steam heat exchanger (31) uses the steam supplied by the boiler to exchange heat with the heat storage medium in the heat storage tank (1). The steam after losing heat becomes drain, and the drain is sent into the heat storage tank (1) via the drain discharge pipe (33) as the heat storage medium. The auxiliary regulating valve (32) is provided on the steam inlet pipeline and is used to regulate the flow of steam entering the steam heat exchanger (31).

4. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 3, characterized in that: The auxiliary heating assembly (3) further comprises a drain valve (34) arranged on the drain discharge pipeline (33).

5. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 3, characterized in that: The auxiliary heating assembly (3) further comprises: a first one-way valve (35) arranged on the hydrophobic discharge pipeline (33).

6. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 1, characterized in that: The heating device for triple-effect flash evaporation of desulfurized wastewater further comprises: a display arranged on the heat storage tank (1), connected to the temperature measuring instrument (4) for signal displaying the temperature of the heat storage medium.

7. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 1, characterized in that: The heating device for triple-effect flash evaporation of desulfurized wastewater further comprises: a photovoltaic heating component (5), connected to the heat storage tank (1), and used for converting light energy into heat energy to heat the heat storage medium in the heat storage tank (1).

8. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 7, characterized in that: The photovoltaic heating assembly (5) comprises: a photovoltaic heater (51); The photovoltaic water inlet of the photovoltaic heater (51) is connected to the water outlet of the heat storage tank (1) via a photovoltaic water inlet pipe, and the water outlet of the photovoltaic heater (51) is connected to the water inlet of the heat storage tank (1) via a photovoltaic return water pipe. The photovoltaic heater (51) is used to convert light energy into heat energy. The heat storage medium in the heat storage tank (1) enters the photovoltaic heater (51) through the photovoltaic water inlet pipe, absorbs heat energy, and then heats up. The heated heat storage medium returns to the heat storage tank (1) again through the photovoltaic return water pipe.

9. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 8, characterized in that: The photovoltaic heating assembly (5) further comprises: a circulating water pump (52), which is arranged on the photovoltaic water inlet pipe and is used to pump the heat storage medium in the heat storage tank (1) into the photovoltaic heater (51).

10. The heating device for triple-effect flash evaporation of desulfurization wastewater according to claim 8, characterized in that: A second one-way valve (53) is provided on the photovoltaic return water pipeline.

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