Corrosion-resistant fluoroplastic steel flue gas treatment device capable of deeply recycling waste heat

By combining the cooling device and the fluorine-plastic steel condensing device in the fluorine-gas treatment device, the fluorine-gas heating and dewhitening are used to form a deep waste heat recovery mechanism, which solves the corrosion problems of white smoke plumes and fluorine-plastic steel condensing devices, and achieves high-efficiency energy-saving and corrosion-resistant effects.

CN119701595APending Publication Date: 2025-03-28HAINING MAQIAO DADUSHI THERMOELECTRICITY CO LTD
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Patent Information

Application Number
CN202311274301.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-28
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

After wet desulfurization, the flue gas temperature is low, resulting in the generation of white smoke plumes. The chemical substances and water vapor in the flue gas cause corrosion of the flue plastic steel condensation device, insufficient heat reuse, resulting in a large amount of energy loss.

Method used

A corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat reuse is designed. By combining the cooling device and the fluoroplastic steel condensing device, the flue gas is heated by heat to reduce the saturation of the flue gas, and water vapor is precipitated through the steam separator, and the absorbed heat is used to dewhiten the flue gas to form a deep waste heat reuse mechanism. The fluoroplastic steel structure and fluoroplastic film have corrosion resistance and anti-gravel effects, extending the service life of the equipment.

Benefits of technology

It effectively solves the problem of generating white smoke plumes, and through the deep waste heat recovery mechanism, the heat utilization efficiency is improved, maintenance and operation costs are reduced, and the service life of the equipment is extended.

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Abstract

The invention provides a deep waste heat recycling corrosion-resistant fluoroplastic steel flue gas treatment device which comprises a dust removal device, a filter screen is arranged in the dust removal device, and a flue gas inlet pipe and a first pipeline are arranged on the dust removal device; the cooling device is provided with a cooling outlet pipe and a cooling return pipe, the bottom of the cooling device is provided with a water collecting tank, and the water collecting tank is provided with a water outlet; the desulfurizing tower is provided with a second pipeline, and the second pipeline is provided with a steam-water separator; a condensation inlet pipe and a condensation outlet pipe are arranged on the fluoroplastic steel condensation device, and a water collecting tank is arranged at the bottom of the fluoroplastic steel condensation device; the white removal device is communicated with the fluoroplastic steel condensing device through a condensation inlet pipe and a condensation outlet pipe, and the white removal device is communicated with the cooling device through a cooling outlet pipe and a cooling return pipe; and a chimney. Through cooling of the cooling device and the fluoroplastic steel condensing device, absorbed flue gas heat is used for heating flue gas to remove white smoke, and the maintenance cost is reduced through the fluoroplastic steel structure.
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Description

Technical Field

[0001] The invention relates to a corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recycling, belonging to the technical field of flue gas treatment. Background Art

[0002] Flue gas desulfurization in coal-fired power plants mostly adopts wet desulfurization technology. After wet desulfurization, the flue gas temperature is about 55°C. The saturated wet flue gas at this temperature is directly discharged into the atmosphere and condenses into water droplets when it is cold, forming "white plumes" under the refraction of sunlight. Although these white plumes are harmless to the atmosphere, they also cause certain visual pollution to the surrounding residents and cause trouble to the lives of the surrounding residents. The resulting complaints affect the normal development of work. From a cost perspective, it is necessary to eliminate the "white plume". Enterprises equipped with wet flue gas desulfurization equipment generally regard the elimination of "white plumes" as an important part of emission control.

[0003] The flue gas contains more chemical substances and is highly corrosive. The flue gas also carries a certain amount of water vapor. The corrosiveness is enhanced in a humid environment, which can damage the pipes of the fluoroplastic steel condensing device or cause impurities and water to adhere to the pipes of the fluoroplastic steel condensing device, causing damage to the fluoroplastic steel condensing device or reducing the working efficiency of the fluoroplastic steel condensing device. The existing facilities do not fully reuse the heat of the flue gas, resulting in a large loss of flue gas energy. Summary of the invention

[0004] Based on the above background, the purpose of the present invention is to provide a corrosion-resistant fluoroplastic steel flue gas treatment device with deep waste heat recovery to solve the problems described in the background technology.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] A corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery, comprising:

[0007] A dust removal device, wherein a filter screen is provided inside the dust removal device, and a smoke inlet pipe and a first pipeline are provided on the dust removal device;

[0008] A cooling device, wherein the cooling device is arranged on the first pipeline, the cooling device is provided with a cooling outlet pipe and a cooling return pipe, the pipelines in the cooling device are arranged in a serpentine shape, a water collecting tank is provided at the bottom of the cooling device, and the water collecting tank is provided with a water outlet;

[0009] A desulfurization tower, wherein the desulfurization tower is connected to a dust removal pipeline through a first pipeline, a second pipeline is provided on the desulfurization tower, and a steam-water separator is provided on the second pipeline;

[0010] A fluoroplastic steel condensing device, wherein the fluoroplastic steel condensing device is arranged on the second pipeline, a condensation inlet pipe and a condensation outlet pipe are arranged on the fluoroplastic steel condensing device, interfaces with the second pipeline are arranged at both ends of the fluoroplastic steel condensing device, the pipelines in the fluoroplastic steel condensing device are arranged in a serpentine shape, a water collecting tank is arranged at the bottom of the fluoroplastic steel condensing device, and the water collecting tank is provided with a water outlet;

[0011] A desulfurization device, wherein the desulfurization device is connected to the desulfurization tower through a second pipeline, the desulfurization device is connected to the fluoroplastic steel condensation device through a condensation inlet pipe and a condensation outlet pipe, and the desulfurization device is connected to the cooling device through a cooling outlet pipe and a cooling return pipe;

[0012] A chimney is connected to the de-whitening device through a third pipe.

[0013] A cooling device is used to transfer the heat loss generated by cooling to the dewhitening device for heating the flue gas. The fluoroplastic steel condensing device further cools the flue gas to remove moisture from the flue gas. At the same time, the heat in the return water is transferred to the dewhitening device, making full use of the flue gas heat to achieve the purpose of high efficiency and energy saving. The fluoroplastic steel condenser is coated with fluoroplastic film on the surface of the fluoroplastic steel heat exchange tube. The fluoroplastic film is inert to most chemical substances and has strong corrosion resistance, avoiding corrosion of metal flue gas heat exchange tubes and condensation of acid. At the same time, because the fluoroplastic film on the surface of fluoroplastic steel is smooth and corrosion-resistant, it can significantly reduce the dust accumulation of the mixed bonding of flue gas and water molecules and extend the service life. Fluoroplastic steel is coated with fluoroplastic film on the steel pipe, which has good rigidity, improving the shortcomings of fluoroplastics such as lack of rigidity, easy shaking and poor thermal conductivity.

[0014] Preferably, the dust removal device is provided with two layers of filters.

[0015] Preferably, the de-whitening device is provided with a heating device. The de-whitening device utilizes the heat recovery of the cooling device and the fluoroplastic steel condensing device to heat the flue gas, and the heating device supplements the heat gap that is insufficient to meet the heating requirement to meet the heating de-whitening requirement.

[0016] Preferably, the cooling device uses a fluoroplastic steel pipe.

[0017] Preferably, sealing plugs are provided at the connection points between the cooling outlet pipe, the cooling return pipe and the cooling device.

[0018] Preferably, the filter is detachable, and a clamping plate is provided on the top of the filter, and a fixing hole is provided on the clamping plate. The water vapor carried by the flue gas forms fixed dirt, which is difficult to remove by vibration and the like, and affects the performance of filtering flue gas and removing dust for a long time. The filter is detachable to ensure the normal operation of the dust removal device, and the detached filter can be reused after cleaning.

[0019] Preferably, a handle is provided on the positioning plate.

[0020] Preferably, a collecting port is provided at the bottom of the dust removal device, and a collecting box is provided below the collecting port.

[0021] Preferably, the collection box is detachable.

[0022] Preferably, sealing plugs are provided at the connections between the condensation inlet pipe, the condensation outlet pipe and the fluoroplastic steel condensation device.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] A corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of the present invention adopts a fluoroplastic steel structure, is resistant to acid and alkali corrosion, and is not prone to scaling. The waste heat recovery is combined with the flue gas dewhitening process to achieve the effect of deep waste heat recovery. The saturation in the flue gas is reduced by cooling the cooling device and the fluoroplastic steel condensing device, and the water vapor is precipitated through the steam-water separator. The heat absorbed by the cooling device and the fluoroplastic steel condensing device is then used to heat the flue gas to increase the saturation and solve the problem of white smoke generation. The maintenance and operation costs are reduced by the fluoroplastic steel structure, and the heat absorption is increased. The cooling device and the fluoroplastic steel condensing device use the heat for flue gas dewhitening to form a deep waste heat recovery mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0026] Figure 1 It is a structural schematic diagram of a corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the collecting tank of the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recycling of the present invention;

[0028] Figure 3 It is a structural schematic diagram of a dust removal device of a corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recycling of the present invention;

[0029] Figure 4 It is a top view of a dust removal device of a corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recycling of the present invention.

[0030] In the figure: 1. smoke inlet pipe; 2. dust removal device; 3. cooling device; 4. desulfurization tower; 5. second pipeline; 6. fluoroplastic steel condensing device; 7. steam-water separator; 8. condensation outlet pipe; 9. condensation return pipe; 10. desulfurization device; 11. chimney; 12. heating device; 13. third pipeline; 14. cooling return pipe; 15. cooling outlet pipe; 16. first pipeline; 17. water collecting tank; 18. water outlet; 19. handle; 20. fixing plate; 21. filter screen; 22. fixing tank; 23. collecting box; 24. collecting port; 25. fixing hole. DETAILED DESCRIPTION

[0031] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings. It should be understood that the implementation of the present invention is not limited to the following embodiments, and any form of modification and / or change made to the present invention will fall within the protection scope of the present invention.

[0032] In the present invention, unless otherwise specified, all parts and percentages are weight units, and the equipment and raw materials used can be purchased from the market or are commonly used in the art. The methods in the following embodiments, unless otherwise specified, are conventional methods in the art. The components or equipment in the following embodiments, unless otherwise specified, are universal standard parts or components known to those skilled in the art, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0033] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following detailed description, for ease of explanation, many specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, one or more embodiments may also be implemented by those skilled in the art without these specific details.

[0034] like Figure 1-2 As shown, a corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery includes a dust removal device 2, a cooling device 3, a desulfurization tower 4, a fluoroplastic steel condensing device 6, a desulfurization device 10 and a chimney 11.

[0035] The dust removal device 2 is provided with a smoke inlet pipe 1 and a first pipeline 16 .

[0036] The cooling device 3 is arranged on the first pipe 16, and is provided with a cooling outlet pipe 15 and a cooling return pipe 14. The pipes in the cooling device 3 are arranged in a serpentine shape. A water collecting tank 17 is provided at the bottom of the cooling device 3 to collect water droplets condensed by flue gas cooling. The water collecting tank 17 is provided with a water outlet 18. A sealing plug is provided at the connection between the cooling outlet pipe 15 and the cooling return pipe 14 and the cooling device 3. The pipe used in the cooling device 3 is a fluoroplastic steel pipe.

[0037] The desulfurization tower 4 is connected to the dust removal pipeline through the first pipeline 16, and a second pipeline 5 is provided on the desulfurization tower 4. The second pipeline 5 is provided with a steam-water separator 7.

[0038] The fluoroplastic steel condensing device 6 is arranged on the second pipeline 5. Interfaces with the second pipeline 5 are arranged at both ends of the fluoroplastic steel condensing device 6. The flue gas passes through the inside of the fluoroplastic steel condensing device 6 and exchanges heat with the internal pipeline of the fluoroplastic steel condensing device 6 to achieve the purpose of cooling. The fluoroplastic steel condensing device 6 is provided with a condensation inlet pipe and a condensation outlet pipe 8. The pipelines in the fluoroplastic steel condensing device 6 are arranged in a serpentine shape. A water collecting tank 17 is provided at the bottom of the fluoroplastic steel condensing device 6. The fluoroplastic steel condensing device 6 is provided with a water outlet 18 in the water collecting tank 17. A sealing plug is provided at the connection between the condensation inlet pipe and the condensation outlet pipe 8 and the fluoroplastic steel condensing device 6.

[0039] The desulfurization device 10 is connected to the desulfurization tower 4 through the second pipeline 5, and the desulfurization device 10 is connected to the fluoroplastic steel condensation device 6 through the condensation inlet pipe and the condensation outlet pipe 8. The desulfurization device 10 is connected to the cooling device 3 through the cooling outlet pipe 15 and the cooling return pipe 14, and the desulfurization device 10 is provided with a third pipeline 13. The desulfurization device 10 is provided with a heating device 12 to supplement the heat.

[0040] The chimney 11 is connected to the deoxidation device 10 through the third pipe 13.

[0041] like Figure 3-4 As shown, a filter screen 21 is provided in the dust removal device 2, and the dust removal device 2 is provided with two layers of filter screens 21. The apertures of the two filter screens 21 are different, and the smoke first passes through the coarse filter screen 21 and then passes through the fine filter screen 21. The filter screen 21 is detachably arranged as an integrated arrangement, and a fixing groove 22 for the filter screen 21 to be inserted as a whole is provided at the bottom of the dust removal device 2. A positioning plate is provided at the top of the filter screen 21, and the positioning plate is arranged on the top of the dust filter device. A fixing hole 25 is provided on the positioning plate. A hole is provided at the top of the dust removal device 2 at a position corresponding to the fixing hole 25, and the fixing plate 20 is fixed to the dust removal device 2 by bolts. A handle 19 is provided on the positioning plate. A collecting port 24 is provided at the bottom of the dust removal device 2, and a collecting box 23 is provided at the lower part of the collecting port 24. The collecting box 23 is detachably arranged.

[0042] During operation, the saturation of the flue gas is reduced through the cooling of the cooling device 3 and the fluoroplastic steel condensing device 6, and the water vapor is precipitated through the steam-water separator 7. The heat absorbed by the cooling device 3 and the fluoroplastic steel condensing device 6 is then used to heat the flue gas to increase the saturation and solve the problem of white smoke generation. The fluoroplastic steel structure reduces maintenance and operation costs and increases heat absorption. The cooling device 3 and the fluoroplastic steel condensing device 6 use the heat for flue gas de-whitening, forming a deep waste heat recycling mechanism.

[0043] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery, characterized by: A dust removal device (2), wherein a filter screen (21) is provided inside the dust removal device (2), and a smoke inlet pipe (1) and a first pipeline (16) are provided on the dust removal device (2); A cooling device (3), the cooling device (3) being arranged on the first pipeline (16), the cooling device (3) being provided with a cooling outlet pipe (15) and a cooling return pipe (14), the pipelines in the cooling device (3) being arranged in a serpentine shape, a water collecting tank (17) being provided at the bottom of the cooling device (3), and the water collecting tank (17) being provided with a water outlet (18); A desulfurization tower (4), the desulfurization tower (4) being connected to a dust removal pipeline via a first pipeline (16), a second pipeline (5) being provided on the desulfurization tower (4), and a steam-water separator (7) being provided on the second pipeline (5); A fluoroplastic steel condensing device (6), wherein the fluoroplastic steel condensing device (6) is arranged on the second pipeline (5), a condensation inlet pipe and a condensation outlet pipe (8) are provided on the fluoroplastic steel condensing device (6), interfaces with the second pipeline (5) are provided at both ends of the fluoroplastic steel condensing device (6), the pipelines in the fluoroplastic steel condensing device (6) are arranged in a serpentine shape, a water collecting tank (17) is provided at the bottom of the fluoroplastic steel condensing device (6), and the water collecting tank (17) is provided with a water outlet (18); A desulfurization device (10), wherein the desulfurization device (10) is connected to the desulfurization tower (4) via a second pipeline (5), the desulfurization device (10) is connected to the fluoroplastic steel condensation device (6) via a condensation inlet pipe and a condensation outlet pipe (8), and the desulfurization device (10) is connected to the cooling device (3) via a cooling outlet pipe (15) and a cooling return pipe (14); A chimney (11), wherein the chimney (11) is connected to the dewhitening device (10) via a third pipe (13).

2. According to the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of claim 1, it is characterized by: The dust removal device (2) is provided with two layers of filter screens (21).

3. According to the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of claim 1, it is characterized by: The dewhitening device (10) is provided with a heating device (12).

4. According to the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of claim 1, it is characterized by: The pipe used in the cooling device (3) is a fluoroplastic steel pipe.

5. According to the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of claim 1, it is characterized by: Sealing plugs are provided at the connection points between the cooling outlet pipe (15) and the cooling return pipe (14) and the cooling device (3).

6. The corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery according to claim 1 is characterized by: The filter screen (21) is detachably arranged, a retaining plate is provided on the top of the filter screen (21), and a fixing hole (25) is provided on the retaining plate.

7. The corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery according to claim 6 is characterized by: The locking plate is provided with a handle (19).

8. According to the corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery of claim 1, it is characterized by: The dust removal device (2) is provided with a collecting port (24) at the bottom, and a collecting box (23) is provided below the collecting port (24).

9. The corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery according to claim 8 is characterized by: The collecting box (23) is detachably arranged.

10. The corrosion-resistant fluoroplastic steel flue gas treatment device for deep waste heat recovery according to claim 1 is characterized by: Sealing plugs are provided at the connection points between the condensation inlet pipe and the condensation outlet pipe (8) and the fluoroplastic steel condensation device (6).