A deaerator for recovering low-temperature waste heat of sulfuric acid

Abstract

The utility model provides a deaerator for recovering low-temperature waste heat of sulfuric acid, which belongs to the technical field of deaerators. It solves the technical problems that existing deaerators need to consume a large amount of external steam, consume a lot of energy, and have high costs. A deaerator for recovering low-temperature waste heat of sulfuric acid includes a deaerator water tank and a deaerator tower fixed on the deaerator water tank. A steam generating chamber is provided inside the deaerator water tank, a flash evaporation nozzle is fixed in the steam generating chamber, a waste heat recovery component is connected to the deaerator water tank, and a steam pipeline is connected between the waste heat recovery component and the deaerator tower. A deaerator component is provided in the deaerator tower, and the bottom end of the deaerator tower is connected to the steam generating chamber. The utility model has the advantage of utilizing the heat released by sulfuric acid during the processing and generation process to perform deoxidation.

Description

Technical Field

[0001] The utility model belongs to the technical field of deaerators and relates to a deaerator, in particular to a deaerator for recovering low-temperature waste heat of sulfuric acid. Background Art

[0002] Sulfuric acid releases heat during the production process, such as heat of sulfuric acid generation, heat of steam condensation, and heat of sulfuric acid dilution, which will release a large amount of heat, that is, low-temperature waste heat with a temperature less than 250°C but greater than 80°C. The low-temperature waste heat can be used to produce 100-150 degree steam through a steam generator; the waste heat can be used for drying; the waste heat can be used to heat water to produce hot water, which can be used for boiler water replenishment, bathing water or other process water. By recovering and reusing this waste heat, energy loss can be reduced and energy can be effectively utilized and saved.

[0003] The current mainstream thermal deaerator mainly uses steam to heat the water to be treated, so that the dissolved oxygen in the water is separated and discharged through the exhaust port to achieve the purpose of deoxygenation. The higher the water temperature, the lower the solubility of oxygen in the water. It can be seen that the temperature of the deaerator water tank is the key to whether deoxygenation can be successfully achieved. Therefore, the deaerator needs to consume a large amount of external steam, which consumes a lot of energy and is costly. However, sulfuric acid production generates a lot of heat, which can be used to deoxygenate, thereby saving energy and reducing consumption. Summary of the invention

[0004] The purpose of the utility model is to solve the above problems in the existing technology and propose a deaerator for recovering low-temperature waste heat of sulfuric acid. The technical problem to be solved by the utility model is: how to realize deoxygenation work by utilizing the heat released in the production process of sulfuric acid.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] A deaerator for low-temperature waste heat recovery of sulfuric acid comprises a deaerator water tank and a deaerator tower fixed on the deaerator water tank, a steam generating chamber is provided inside the deaerator water tank, a flash nozzle is fixed in the steam generating chamber, a waste heat recovery component is connected to the deaerator water tank, a steam pipeline is connected between the waste heat recovery component and the deaerator tower, a deaerator component is arranged in the deaerator tower, and the bottom end of the deaerator tower is connected to the steam generating chamber.

[0007] The working principle of the utility model is that the waste heat of sulfuric acid can be recovered through the waste heat recovery component, so that the deoxygenated water in the deoxygenation water tank is heated and gasified, and its steam is introduced into the deoxygenation tower to perform deoxygenation work, and the deoxygenated water produced after deoxygenation flows into the deoxygenation water tank again, which is convenient for next use, thereby improving the deoxygenation efficiency and effect.

[0008] The waste heat recovery component includes a booster pump, a sulfuric acid cooler 1, and a sulfuric acid cooler 2. A liquid infusion pipeline is connected between the sulfuric acid cooler 1 and the steam generating chamber, the booster pump is connected to the liquid infusion pipeline, and the sulfuric acid inlet of the sulfuric acid cooler 1 is connected to a hot sulfuric acid pipeline 1, a hot sulfuric acid pipeline 2 is connected between the sulfuric acid outlet of the sulfuric acid cooler 1 and the sulfuric acid inlet of the sulfuric acid cooler 2, a desalted water delivery pipeline is connected to the water inlet of the sulfuric acid cooler 2, the steam outlet of the sulfuric acid cooler 2 is fixedly connected to one end of the steam pipeline, and the flash evaporation nozzle is connected to the sulfuric acid cooler 1 through a pipeline.

[0009] By adopting the above structure, sulfuric acid can be used as a heat source, and sulfuric acid cooler 1 and sulfuric acid cooler 2 can be used as heat exchange components to heat and vaporize the oxygen-free water in the deaeration water tank and transport it into the deaeration tower to achieve deoxygenation of the external water source.

[0010] The deoxygenation component includes a water chamber fixed in the deoxygenation tower and a steam chamber fixed in the deoxygenation tower. A plurality of film-forming tubes are fixed in the water chamber and the steam chamber. A plurality of film-forming tubes are provided with a plurality of spirally arranged inclined holes. The top ends of the plurality of film-forming tubes extend out of the water chamber, and the bottom ends of the plurality of film-forming tubes extend out of the steam chamber. A steam interface connected to the steam chamber is fixed on the deoxygenation tower, and a water replenishment interface connected to the water chamber is fixed on the deoxygenation tower.

[0011] By adopting the above structure, the water temperature can be rapidly and significantly increased through the mixing and heating reaction of water vapor in the film tube, and a rotating water film skirt is formed at the opening at the bottom end of the film tube, and the water temperature is raised to the saturation temperature, thereby completing the initial deoxygenation work. This technology is the existing water film deoxygenation technology.

[0012] A plurality of arranged and fixed water distribution plates are fixed in the bottom of the deaerator, a multi-layer liquid-vapor network is fixed in the deaerator, the multi-layer liquid-vapor network is located at the bottom of the water distribution plates, a steam interface 2 connected to the inside of the deaerator is fixed at the bottom of the deaerator, and steam interface 1 and steam interface 2 are fixedly connected to the other end of the steam pipe.

[0013] By adopting the above structure, the initially deoxygenated water can be evenly dropped onto the liquid-vapor net through the water distribution plate, thereby reducing the surface tension of the water, increasing the time the water remains on the liquid-vapor net, improving the reaction effect of the secondary steam, and completing the secondary deoxygenation of the water.

[0014] An external steam interface connected to the interior of the deaerator tower is fixed on the deaerator tower.

[0015] By adopting the above structure, external steam can be transported into the deaerator through the external steam interface, so as to maintain the temperature in the deaerator stable and improve the effect of steam deoxidation.

[0016] A vent valve is fixed on the top of the deaerator, an interface of the vent valve is fixedly connected to a waste steam injection pipeline, and a muffler and an external air supply valve are fixed on the waste steam injection pipeline.

[0017] By adopting the above structure, the exhaust steam produced as a by-product in the deoxidation process can be recovered and utilized through the exhaust steam injection pipeline.

[0018] Compared with the existing technology, this deaerator for low-temperature waste heat recovery of sulfuric acid has the following advantages:

[0019] 1. The waste heat of sulfuric acid is recovered through the waste heat recovery component, and its heat is transferred into the deoxygenated water to generate steam for heating and stripping the desalted water entering the deoxygenation tower to complete the deoxygenation work. At the same time, the by-product exhaust steam is sent to the steam injection device through a pipeline to replace the external steam to increase the net steam production rate of the sulfuric acid low-temperature device, thereby saving energy and reducing consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a schematic diagram of the structure inside the steam cylinder of the utility model.

[0022] Figure 3 It is a schematic diagram of the structure inside the deaeration tower in the utility model.

[0023] In the figure, 1. deaeration water tank; 2. deaeration tower; 3. steam generating chamber; 4. flash nozzle; 5. steam pipe; 6. booster pump; 7. sulfuric acid cooler 1; 8. sulfuric acid cooler 2; 9. liquid infusion pipeline; 10. hot sulfuric acid pipeline 1; 11. hot sulfuric acid pipeline 2; 12. steam chamber; 13. film-forming tube; 14. inclined hole; 15. steam interface 1; 16. water supply interface; 17. water distribution plate; 18. liquid-steam network; 19. steam interface 2; 20. water chamber; 21. external steam interface; 22. vent valve; 23. exhaust steam injection pipeline; 24. desalted water delivery pipeline. DETAILED DESCRIPTION

[0024] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0025] like Figure 1-Figure 3 As shown, a deaerator for low-temperature waste heat recovery of sulfuric acid includes a deaerator water tank 1 and a deaerator tower 2 fixed on the deaerator water tank 1, a steam generating chamber 3 is opened inside the deaerator water tank 1, a flash evaporation nozzle 4 is fixed in the steam generating chamber 3, a waste heat recovery component is connected to the deaerator water tank 1, and a steam pipe 5 is connected between the waste heat recovery component and the deaerator tower 2, a deaerator component is arranged in the deaerator tower 2, and the bottom end of the deaerator tower 2 is connected to the steam generating chamber 3.

[0026] The waste heat of sulfuric acid can be recovered through the waste heat recovery component, so that the deoxygenated water in the deoxygenated water tank 1 is heated and vaporized, and its steam is introduced into the deoxygenation tower 2 for deoxygenation. The deoxygenated water produced after deoxygenation flows into the deoxygenated water tank 1 again, which is convenient for next use, thereby improving the deoxygenation efficiency and effect.

[0027] The waste heat recovery component includes a booster pump 6, a sulfuric acid cooler 7, and a sulfuric acid cooler 8. A liquid infusion pipeline 9 is connected between the sulfuric acid cooler 7 and the steam generating chamber 3. The booster pump 6 is connected to the liquid infusion pipeline 9, and the sulfuric acid inlet of the sulfuric acid cooler 7 is connected to a hot sulfuric acid pipeline 10. A hot sulfuric acid pipeline 2 11 is connected between the sulfuric acid outlet of the sulfuric acid cooler 7 and the sulfuric acid inlet of the sulfuric acid cooler 8. The water inlet of the sulfuric acid cooler 2 is connected to a desalted water delivery pipeline 24. The steam outlet of the sulfuric acid cooler 2 is fixedly connected to one end of the steam pipeline 5, and the flash nozzle 4 is connected to the sulfuric acid cooler 7 through a pipeline.

[0028] By adopting the above structure, sulfuric acid can be used as a heat source, and sulfuric acid cooler 1 7 and sulfuric acid cooler 2 8 are used as heat exchange components to heat and vaporize the oxygen-free water in the deoxygenation water tank 1, and transport it into the deoxygenation tower 2 to achieve deoxygenation of the external water source.

[0029] The deoxygenation component includes a water chamber 20 fixed in the deoxygenation tower 2 and a steam chamber 12 fixed in the deoxygenation tower 2. A plurality of film-forming tubes 13 are fixed in the water chamber 20 and the steam chamber 12. A plurality of film-forming tubes 13 are each provided with a plurality of spirally arranged inclined holes 14. The top ends of the plurality of film-forming tubes 13 each extend out of the water chamber 20, and the bottom ends of the plurality of film-forming tubes 13 each extend out of the steam chamber 12. A steam interface 15 connected to the steam chamber 12 is fixed on the deoxygenation tower 2, and a water replenishment interface 16 connected to the water chamber 20 is fixed on the deoxygenation tower 2.

[0030] By adopting the above structure, the water temperature can be rapidly and significantly increased through the mixing and heating reaction of water vapor in the film tube 13, and a rotating water film skirt is formed at the bottom opening of the film tube 13, and the water temperature is raised to the saturation temperature, thereby completing the initial deoxygenation work. This technology is the existing water film deoxygenation technology.

[0031] A plurality of arranged and fixed water distribution plates 17 are fixed inside the bottom of the deaerator 2, a multi-layer liquid-vapor network 18 is fixed inside the deaerator 2, and the multi-layer liquid-vapor network 18 is located at the bottom of the water distribution plates 17. A steam interface 2 19 connected to the inside of the deaerator 2 is fixed at the bottom of the deaerator 2, and the steam interface 1 15 and the steam interface 2 19 are fixedly connected to the other end of the steam pipe 5.

[0032] By adopting the above structure, the initially deoxygenated water can be evenly dropped onto the liquid-vapor net 18 through the water distribution plate 17, thereby reducing the surface tension of the water, increasing the time the water stays on the liquid-vapor net 18, improving the reaction effect of the secondary steam, and completing the secondary deoxygenation of the water.

[0033] An external steam interface 21 communicating with the interior of the deaerator tower 2 is fixed on the deaerator tower 2 .

[0034] By adopting the above structure, external steam can be transported into the deoxidation tower 2 through the external steam interface 21, so as to maintain the temperature in the deoxidation tower 2 stable and improve the effect of steam deoxidation.

[0035] A vent valve 22 is fixed on the top of the deaerator tower 2, and a waste steam injection pipeline 23 is fixedly connected to the interface of the vent valve 22, and a muffler and an external air supply valve are fixed on the waste steam injection pipeline 23.

[0036] By adopting the above structure, the exhaust steam produced as a by-product in the deoxidation process can be recovered and utilized through the exhaust steam injection pipeline 23 .

[0037] The working principle of the utility model is as follows: by using sulfuric acid as a heat source, and then using sulfuric acid cooler 1 7 and sulfuric acid cooler 2 8 as heat exchange components, the oxygen-free water in the deoxygenation water tank 1 is heated and gasified, and its high-temperature steam is transported into the deoxygenation tower 2, and the high-temperature steam and water liquid are mixed and heated in the film tube 13 to react with water vapor, and the water temperature is rapidly and substantially increased, and a rotating water film skirt is formed at the bottom opening of the film tube 13, and the water temperature is raised to the saturation temperature, so as to complete the initial deoxygenation work, and the water body of the initial deoxygenation is uniformly dropped on the liquid vapor network 18 through the water distribution plate 17, so as to reduce the surface tension of the water body, and increase the time that the water body remains on the liquid vapor network 18, thereby improving the reaction effect of the secondary steam, and completing the secondary deoxygenation of the water body, and the deoxygenated water produced after deoxygenation flows into the deoxygenation water tank 1 again, so as to be convenient for use next time, thereby improving the deoxygenation efficiency and effect, and the exhaust steam produced as a by-product in the deoxygenation process is transported to the steam injection device through a pipeline.

[0038] In summary, the waste heat of sulfuric acid is recovered through the waste heat recovery component, so that the deoxygenated water in the deoxygenated water tank 1 is heated and vaporized, and its steam is introduced into the deoxygenation tower 2 for deoxygenation, and the deoxygenated water produced after deoxygenation flows into the deoxygenated water tank 1 again, which is convenient for next use, thereby improving the deoxygenation efficiency and effect.

[0039] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A deaerator for recovering low-temperature waste heat of sulfuric acid, comprising a deaerator water tank (1) and a deaerator tower (2) fixed on the deaerator water tank (1), characterized in that: The deoxygenation water tank (1) is provided with a steam generation chamber (3) inside, a flash nozzle (4) is fixed inside the steam generation chamber (3), a waste heat recovery component is connected to the deoxygenation water tank (1), and a steam pipeline (5) is connected between the waste heat recovery component and the deoxygenation tower (2), a deoxygenation component is arranged inside the deoxygenation tower (2), and the bottom end of the deoxygenation tower (2) is connected to the steam generation chamber (3).

2. A deaerator for recovering low-temperature waste heat of sulfuric acid according to claim 1, characterized in that: The waste heat recovery component comprises a booster pump (6), a sulfuric acid cooler 1 (7), and a sulfuric acid cooler 2 (8); a liquid infusion pipeline (9) is connected between the sulfuric acid cooler 1 (7) and the steam generating chamber (3); the liquid infusion pipeline (9) is connected to the booster pump (6); a sulfuric acid inlet of the sulfuric acid cooler 1 (7) is connected to a hot sulfuric acid pipeline 1 (10); a hot sulfuric acid pipeline 2 (11) is connected between the sulfuric acid outlet of the sulfuric acid cooler 1 (7) and the sulfuric acid inlet of the sulfuric acid cooler 2 (8); a demineralized water delivery pipeline (24) is connected to the water inlet of the sulfuric acid cooler 2; the steam outlet of the sulfuric acid cooler 2 is fixedly connected to one end of the steam pipeline (5); and a flash evaporation nozzle (4) is connected to the sulfuric acid cooler 1 (7) through a pipeline.

3. A deaerator for recovering low-temperature waste heat of sulfuric acid according to claim 1, characterized in that: The deoxygenation component comprises a water chamber (20) fixed in the deoxygenation tower (2) and a steam chamber (12) fixed in the deoxygenation tower (2); a plurality of film-forming tubes (13) are fixed in the water chamber (20) and the steam chamber (12); a plurality of film-forming tubes (13) are each provided with a plurality of spirally arranged inclined holes (14); the top ends of the plurality of film-forming tubes (13) each extend out of the water chamber (20); the bottom ends of the plurality of film-forming tubes (13) each extend out of the steam chamber (12); a steam interface (15) connected to the steam chamber (12) is fixed on the deoxygenation tower (2); and a water supply interface (16) connected to the water chamber (20) is fixed on the deoxygenation tower (2).

4. A deaerator for recovering low-temperature waste heat of sulfuric acid according to claim 3, characterized in that: A plurality of arranged and fixed water distribution plates (17) are fixed in the bottom of the deaerator (2), a plurality of liquid-vapor nets (18) are fixed in the deaerator (2), and the plurality of liquid-vapor nets (18) are located at the bottom of the water distribution plates (17), a second steam interface (19) connected to the inside of the deaerator (2) is fixed at the bottom of the deaerator (2), and the first steam interface (15) and the second steam interface (19) are both fixedly connected to the other end of the steam pipeline (5).

5. A deaerator for recovering low-temperature waste heat of sulfuric acid according to claim 1, characterized in that: An external steam interface (21) connected to the interior of the deoxygenation tower (2) is fixed on the deoxygenation tower (2).

6. A deaerator for recovering low-temperature waste heat of sulfuric acid according to claim 1, characterized in that: A vent valve (22) is fixed at the top of the deaeration tower (2), an interface of the vent valve (22) is fixedly connected to a waste steam injection pipeline (23), and a muffler and an external air supply valve are fixed on the waste steam injection pipeline (23).

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