Desulfurization device and method suitable for thermal power plant

Abstract

The invention relates to the technical field of waste gas purification, in particular to a desulfurization device and method suitable for a thermal power plant, and the desulfurization device suitable for the thermal power plant comprises a spray tower, a plurality of support columns, a gas inlet pipe, a liquid supply pipe, a spiral guide plate, a plurality of spray heads, a bracket, a rotary joint and a driving mechanism; the driving mechanism drives the liquid supply pipe to rotate, the liquid supply pipe drives the spiral flow guide plate to rotate, the spiral flow guide plate can scrape and clean the inner wall of the spray tower, and impurities or crystals are scraped downwards; during use, sulfur-containing flue gas enters the spray tower through the gas inlet pipe by the induced draft fan; the ammonia water supply source supplies ammonia water to the liquid supply pipe through the water pump, and the ammonia water is uniformly sprayed out after being atomized by the plurality of spray heads to form an efficient absorption liquid curtain; the spiral guide plate guides the sulfur-containing flue gas to rise along a spiral path, the contact reaction time of the sulfur-containing flue gas and ammonia water is prolonged, and the purified flue gas is discharged from the top of the spray tower; therefore, the retention time of the flue gas in the spray tower can be effectively prolonged, and the removal rate of sulfur dioxide is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of waste gas purification, in particular to a desulfurization device and method suitable for thermal power plants. BACKGROUND

[0002] With the continuous development of energy structure and the increasingly stringent environmental protection requirements in China, thermal power generation provides stable power supply, but the large amount of harmful gases such as sulfur dioxide generated in the combustion process causes serious pollution to the atmospheric environment and is one of the main causes of acid rain. Therefore, flue gas desulfurization has become an essential atmospheric pollution control link for thermal power plants.

[0003] In the prior art, the desulfurization device sprays ammonia water as an absorbent in a spray tower, and uses ammonia desulfurization technology to remove sulfur dioxide in flue gas. The reaction speed is fast, the desulfurization efficiency is high, and it has certain application advantages.

[0004] However, it is found in actual operation that due to the too fast upward speed of flue gas in the tower, the gas-liquid contact time is insufficient, which causes the ammonia water and sulfur dioxide to not fully react, and part of the sulfur dioxide is not effectively absorbed and is discharged with the flue gas, resulting in a decrease in desulfurization effect. SUMMARY

[0005] The purpose of the present application is to provide a desulfurization device and method suitable for thermal power plants, which can effectively prolong the residence time of flue gas in the spray tower and improve the sulfur dioxide removal rate.

[0006] To achieve the above purpose, in a first aspect, the present application provides a desulfurization device suitable for thermal power plants, comprising a spray tower, a plurality of support columns, an air inlet pipe, a liquid supply pipe, a spiral guide plate, a plurality of spray heads, a support, a rotary joint and a driving mechanism. A plurality of support columns are fixedly arranged at the bottom of the spray tower; the air inlet pipe is fixedly connected and communicated with the spray tower; the liquid supply pipe is rotatably arranged in the spray tower; the spiral guide plate is fixedly arranged on the liquid supply pipe and located in the spray tower; the liquid supply pipe is provided with a plurality of spray heads in communication along the axial direction; the support is fixedly arranged at the bottom of the spray tower; the rotary joint is fixedly arranged on the support, and the rotary end of the rotary joint is fixedly connected and communicated with the liquid supply pipe; the driving mechanism is arranged on the support and used for driving the liquid supply pipe to rotate.

[0007] The desulfurization device suitable for thermal power plants further comprises a cross rod. The cross rod is fixedly arranged in the spray tower and rotatably connected with the top end of the liquid supply pipe.

[0008] The desulfurization device suitable for thermal power plants further comprises a support plate and a multi-way selection valve. The support plate is fixedly arranged at the bottom of the support; the outlet of the multi-way selection valve is fixedly connected with and communicated with the static end of the rotary joint; the three inlets of the multi-way selection valve are respectively connected with ammonia water supply source, compressed gas supply source and clean water supply source to realize selective supply of different working media.

[0009] The desulfurization device for thermal power plants further comprises a detachable tower top, a plurality of mounting mechanisms, an activated carbon bearing basket and a boom. The detachable tower top is arranged at the top of the spray tower; the plurality of mounting mechanisms are arranged on the detachable tower top; the activated carbon bearing basket is arranged in the detachable tower top and is positioned and supported by the plurality of mounting mechanisms; and the boom is fixedly arranged at the top of the detachable tower top.

[0010] The desulfurization device for thermal power plants further comprises a sealing ring. The sealing ring is fixedly arranged at the bottom of the detachable tower top.

[0011] The desulfurization device for thermal power plants further comprises a plurality of anti-falling pad feet. The plurality of anti-falling pad feet are fixedly arranged at the bottom of the activated carbon bearing basket.

[0012] The desulfurization device for thermal power plants further comprises a plurality of positioning cylinders and a plurality of positioning rods. The plurality of positioning cylinders are fixedly arranged on the spray tower; the positioning cylinders have upwardly-opening trumpet-shaped inlets; the plurality of positioning rods are fixedly arranged on the detachable tower top; and the positioning rods have hemispherical ends.

[0013] The driving mechanism comprises a speed-reducing motor, a driving gear and a driven gear. The speed-reducing motor is fixedly arranged on the support; the driving gear is fixedly arranged at the output end of the speed-reducing motor; and the driven gear is fixedly arranged on the liquid supply pipe and is in mesh with the driving gear.

[0014] The mounting mechanism comprises a supporting block, a mounting cylinder and a screw rod. The supporting block is slidingly arranged on and penetrates through the detachable tower top; the mounting cylinder is fixedly arranged at the side edge of the detachable tower top; and the screw rod is rotationally connected with the supporting block and is threadedly connected with and penetrates through the mounting cylinder.

[0015] In the second aspect, the present application further provides a desulfurization method for thermal power plants, comprising: The sulfur-containing flue gas is introduced into the spray tower through the air inlet pipe by means of the induced draft fan; The ammonia water supply source supplies ammonia water to the liquid supply pipe through a water pump, and the ammonia water is atomized by multiple spray heads and then uniformly sprayed to form a high-efficiency absorption liquid curtain. The spiral guide plate guides the sulfur-containing flue gas to rise along a spiral path, prolongs the contact reaction time with the ammonia water, and the purified flue gas is discharged from the top of the spray tower.

[0016] The desulfurization device and method suitable for a thermal power plant, a plurality of the support posts vertically support the spray tower; the air inlet pipe is used to introduce sulfur-containing flue gas into the spray tower; the liquid supply pipe is vertically arranged in the spray tower and can rotate; the spiral guide plate is fixedly arranged on the liquid supply pipe, the edge is in contact with the inner wall of the spray tower to form a spiral path; the bracket is used to install the rotary joint, the liquid supply pipe is used to communicate with an ammonia water supply source through the rotary joint, and then the ammonia water is uniformly sprayed through multiple spray heads to form a high-efficiency absorption liquid curtain; and the driving mechanism is used to drive the liquid supply pipe to rotate, the rotation of the liquid supply pipe drives the spiral guide plate to rotate, and the rotation of the spiral guide plate can scrape and clean the inner wall of the spray tower to scrape down impurities or crystals. In use, the sulfur-containing flue gas enters the spray tower through the air inlet pipe by means of the induced draft fan; the ammonia water supply source supplies ammonia water to the liquid supply pipe through a water pump, and the ammonia water is atomized by multiple spray heads and then uniformly sprayed to form a high-efficiency absorption liquid curtain; the spiral guide plate guides the sulfur-containing flue gas to rise along a spiral path, prolongs the contact reaction time with the ammonia water, and the purified flue gas is discharged from the top of the spray tower; in the above manner, the residence time of the flue gas in the spray tower can be effectively prolonged, and the sulfur dioxide removal rate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced below.

[0018] Figure 1 is a structural schematic diagram of the first embodiment of the present application.

[0019] Figure 2 is Figure 1 Partial enlarged view of detail A.

[0020] Figure 3 is another angle structural schematic diagram of the first embodiment of the present application.

[0021] Figure 4 is Figure 3 Partial enlarged view of detail B.

[0022] Figure 5 is a sectional view of the first embodiment of the present application.

[0023] Figure 6 is Figure 5 Detail C is a partial enlarged view.

[0024] Figure 7 is a flow schematic diagram of the second embodiment of the present application.

[0025] 1-spray tower, 2-support column, 3-inlet pipe, 4-liquid supply pipe, 5-spiral flow guide plate, 6-sprayer, 7-bracket, 8-rotary joint, 9-driving mechanism, 10-crossbar, 11-branch plate, 12-multiple selection valve, 13-detachable tower top, 14-mounting mechanism, 15-activated carbon bearing basket, 16-hanger rod, 17-sealing ring, 18-anti-falling pad foot, 19-positioning cylinder, 20-positioning rod, 901-reduction motor, 902-driving gear, 903-driven gear, 1401-supporting block, 1402-mounting cylinder, 1403-screw rod. DETAILED DESCRIPTION

[0026] The first embodiment of the present application is: Please refer to Figures 1-6 , wherein Figure 1 is a structural schematic diagram of the first embodiment of the present application. Figure 2 is Figure 1 Detail A is a partial enlarged view. Figure 3 is another angle of the structural schematic diagram of the first embodiment of the present application. Figure 4 is Figure 3 Detail B is a partial enlarged view. Figure 5 is a sectional view of the first embodiment of the present application. Figure 6 is Figure 5 Detail C is a partial enlarged view.

[0027] The present application provides a desulfurization device suitable for thermal power plants: comprising a spray tower 1, a plurality of support columns 2, an inlet pipe 3, a liquid supply pipe 4, a spiral flow guide plate 5, a plurality of sprayers 6, a bracket 7, a rotary joint 8 and a driving mechanism 9; the desulfurization device suitable for thermal power plants further comprises a crossbar 10; the desulfurization device suitable for thermal power plants further comprises a branch plate 11 and a multiple selection valve 12; the desulfurization device suitable for thermal power plants further comprises a detachable tower top 13, a plurality of mounting mechanisms 14, an activated carbon bearing basket 15 and a hanger rod 16; the desulfurization device suitable for thermal power plants further comprises a sealing ring 17; the desulfurization device suitable for thermal power plants further comprises a plurality of anti-falling pad feet 18; the desulfurization device suitable for thermal power plants further comprises a plurality of positioning cylinders 19 and a plurality of positioning rods 20; the driving mechanism 9 comprises a reduction motor 901, a driving gear 902 and a driven gear 903; the mounting mechanism 14 comprises a supporting block 1401, a mounting cylinder 1402 and a screw rod 1403; through the foregoing scheme, the residence time of flue gas in the spray tower 1 can be effectively prolonged, and the sulfur dioxide removal rate is improved.

[0028] Further, a plurality of the support posts 2 are fixedly arranged at the bottom of the spray tower 1; the air inlet pipe 3 is fixedly connected with the spray tower 1 and in communication; the liquid supply pipe 4 is rotatably arranged in the spray tower 1; the spiral flow guide plate 5 is fixedly arranged on the liquid supply pipe 4 and located in the spray tower 1; the liquid supply pipe 4 is in communication with a plurality of the spray heads 6 arranged along the axial direction; the support 7 is fixedly arranged at the bottom of the spray tower 1; the rotary joint 8 is fixedly arranged on the support 7, and the rotary end of the rotary joint 8 is fixedly connected with the liquid supply pipe 4 and in communication; the driving mechanism 9 is arranged on the support 7 and used for driving the liquid supply pipe 4 to rotate.

[0029] In the embodiment, the plurality of the support posts 2 vertically support the spray tower 1; the air inlet pipe 3 is used for introducing the sulfur-containing flue gas into the spray tower 1; the liquid supply pipe 4 is vertically arranged in the spray tower 1 and can rotate; the spiral flow guide plate 5 is fixedly arranged on the liquid supply pipe 4 and in contact with the inner wall of the spray tower 1, forming a spiral path; the support 7 is used for mounting the rotary joint 8; the liquid supply pipe 4 is used for communicating with an ammonia water supply source through the rotary joint 8, and then the ammonia water is uniformly sprayed out through the plurality of the spray heads 6, forming a high-efficiency absorption liquid curtain; the driving mechanism 9 is used for driving the liquid supply pipe 4 to rotate, and the rotation of the liquid supply pipe 4 drives the spiral flow guide plate 5 to rotate, and the rotation of the spiral flow guide plate 5 can scrape and clean the inner wall of the spray tower 1, scraping down impurities or crystals; In use, the sulfur-containing flue gas is introduced into the spray tower 1 through the air inlet pipe 3 by the induced draft fan; the ammonia water supply source supplies ammonia water into the liquid supply pipe 4 through the water pump, and the ammonia water is atomized and uniformly sprayed out through the plurality of the spray heads 6, forming a high-efficiency absorption liquid curtain; the spiral flow guide plate 5 guides the sulfur-containing flue gas to rise along the spiral path, prolonging the contact reaction time with the ammonia water, and the purified flue gas is discharged from the top of the spray tower 1; in the above manner, the residence time of the flue gas in the spray tower 1 can be effectively prolonged, and the removal rate of sulfur dioxide can be improved.

[0030] Further, the desulfurization device suitable for thermal power plants further comprises a cross rod 10. The cross rod 10 is fixedly arranged in the spray tower 1 and rotatably connected with the top end of the liquid supply pipe 4.

[0031] In the embodiment, the cross rod 10 is arranged at the top of the spray tower 1 and does not affect the discharge of flue gas, and is used for reinforcing the rotation and installation of the liquid supply pipe 4.

[0032] Further, the desulfurization device suitable for thermal power plants further comprises a support plate 11 and a multi-way selection valve 12. The support plate 11 is fixedly arranged at the bottom of the support 7; the outlet of the multi-way selection valve 12 is fixedly connected with and communicated with the static end of the rotary joint 8; the three inlets of the multi-way selection valve 12 are respectively connected with ammonia water supply source, compressed gas supply source and clean water supply source, so as to realize selective supply of different working media.

[0033] In the embodiment, the support plate 11 is used for mounting the multi-way selection valve 12, and the multi-way selection valve 12 can select to supply ammonia water, compressed gas or clean water into the liquid supply pipe 4 according to needs; After the purification of the sulfur-containing flue gas is completed, there is part of the ammonia water residual liquid which has contacted with sulfur dioxide on the nozzle 6, and if it is not cleaned, it will crystallize to cause blockage, and there is also part of the ammonia water residual liquid which has contacted with sulfur dioxide on the inner wall of the spray tower 1, and if it is not cleaned, it will also crystallize, and even the crystallization has begun; at this time, the driving mechanism 9 can be started to drive the liquid supply pipe 4 to rotate, and drive the spiral guide plate 5 to rotate, the spiral guide plate 5 scrapes the inner wall of the spray tower 1 to gradually scrape down the generated crystallization and ammonia water residual liquid, at the same time, the multi-way selection valve 12 is switched to the clean water supply source, so that the multiple nozzles 6 spray clean water, the clean water washes the ammonia water residual liquid on the nozzles 6 clean, and the sprayed water mist also washes the inner wall of the spray tower 1; after the clean water washing is completed, the compressed gas is switched to, and the nozzles 6 are completely blown dry by the compressed gas, so as to avoid liquid residue.

[0034] Further, the desulfurization device suitable for thermal power plants further comprises a detachable tower top 13, a plurality of mounting mechanisms 14, an activated carbon bearing basket 15 and a boom 16. The detachable tower top 13 is arranged at the top of the spray tower 1; the plurality of mounting mechanisms 14 are respectively arranged on the detachable tower top 13; the activated carbon bearing basket 15 is arranged in the detachable tower top 13 and is positioned and supported by the plurality of mounting mechanisms 14; and the boom 16 is fixedly arranged at the top of the detachable tower top 13.

[0035] In the embodiment, the detachable tower top 13 is detachably arranged at the top of the spray tower 1, and the activated carbon bearing basket 15 is arranged in the detachable tower top 13 through the plurality of mounting mechanisms 14, and the activated carbon bearing basket 15 is internally provided with activated carbon, which is used for further purifying the sulfur-containing flue gas and further improving the desulfurization effect, and the boom 16 is used for facilitating the hoisting of the detachable tower top 13 by a small crane.

[0036] Further, the desulfurization device suitable for thermal power plants further comprises a sealing ring 17. The sealing ring 17 is fixedly arranged at the bottom of the detachable tower top 13.

[0037] In the embodiment, the sealing ring 17 is used to seal the gap between the bottom of the detachable tower top 13 and the top of the spray tower 1, so as to avoid sulfur-containing flue gas leakage.

[0038] Further, the desulfurization device suitable for thermal power plants further comprises a plurality of anti-falling feet 18. The plurality of anti-falling feet 18 are respectively fixedly arranged at the bottom of the activated carbon bearing basket 15.

[0039] In the embodiment, the bottoms of the plurality of anti-falling feet 18 are flush with the bottom of the detachable tower top 13. When the detachable tower top 13 is hoisted down and placed on the ground, the plurality of anti-falling feet 18 are also supported on the ground. At this time, the support of the plurality of mounting mechanisms 14 is loosened, and the activated carbon bearing basket 15 will not suddenly fall to the ground. Then, the detachable tower top 13 is hoisted upward and separated from the activated carbon bearing basket 15, at which time the activated carbon can be replaced. After the replacement is completed, the detachable tower top 13 is hoisted and sleeved on the activated carbon bearing basket 15, the activated carbon bearing basket 15 is repositioned by the plurality of mounting mechanisms 14, and finally the detachable tower top 13 is rehoisted to the top of the spray tower 1.

[0040] Further, the desulfurization device suitable for thermal power plants further comprises a plurality of positioning cylinders 19 and a plurality of positioning rods 20. The plurality of positioning cylinders 19 are respectively fixedly arranged on the spray tower 1, and the positioning cylinder 19 has an upward trumpet-shaped inlet. The plurality of positioning rods 20 are respectively fixedly arranged on the detachable tower top 13, and the positioning rod 20 has a hemispherical end.

[0041] In the embodiment, the hemispherical end of the positioning rod 20 is used to facilitate sliding along the trumpet-shaped inlet of the positioning cylinder 19, and is used to facilitate automatic alignment. After the plurality of positioning rods 20 are inserted into the plurality of positioning cylinders 19, the detachable tower top 13 is relatively stably mounted on the top of the spray tower 1.

[0042] Further, the driving mechanism 9 comprises a speed reducer motor 901, a driving gear 902, and a driven gear 903. The speed reducer motor 901 is fixedly arranged on the support 7, the driving gear 902 is fixedly arranged on the output end of the speed reducer motor 901, and the driven gear 903 is fixedly arranged on the liquid supply pipe 4 and is engaged with the driving gear 902.

[0043] In the embodiment, the speed reducer motor 901 drives the driving gear 902 to rotate slowly, the driving gear 902 drives the driven gear 903 to rotate, and the driven gear 903 drives the liquid supply pipe 4 to rotate.

[0044] Furthermore, the mounting mechanism 14 includes a support block 1401, a mounting cylinder 1402, and a screw 1403; The support block 1401 is slidably disposed on the detachable tower top 13 and passes through the detachable tower top 13; the mounting cylinder 1402 is fixedly disposed on the side of the detachable tower top 13; the screw 1403 is rotatably connected to the support block 1401 and threadedly connected to the mounting cylinder 1402 and passes through the mounting cylinder 1402.

[0045] In this embodiment, the mounting cylinder 1402 is used to cover the support block 1401 and to thread the screw 1403. Rotating the screw 1403 can drive the support block 1401 to slide. The support block 1401 slides into the detachable tower top 13, thus supporting the activated carbon support basket 15.

[0046] This embodiment describes a desulfurization device suitable for thermal power plants. Multiple support columns 2 vertically support a spray tower 1. An inlet pipe 3 introduces sulfur-containing flue gas into the spray tower 1. A liquid supply pipe 4 is vertically installed inside the spray tower 1 and is rotatable. A spiral guide plate 5 is fixedly installed on the liquid supply pipe 4, with its edge contacting the inner wall of the spray tower 1, forming a spiral path. A bracket 7 is used to install a rotary joint 8. The liquid supply pipe 4 connects to an ammonia supply source through the rotary joint 8, and then the ammonia is evenly sprayed out through multiple nozzles 6, forming a highly efficient absorption liquid curtain within the spiral path. A driving mechanism 9 drives the liquid supply pipe 4 to rotate, which in turn drives the spiral guide plate 5 to rotate. The rotation of the spiral guide plate 5 scrapes and cleans the inner wall of the spray tower 1, scraping impurities or crystals downwards. In operation, sulfur-containing flue gas is drawn into the spray tower 1 through the inlet pipe 3 by an induced draft fan; ammonia water is supplied to the liquid supply pipe 4 by a water pump, and the ammonia water is atomized by multiple nozzles 6 and sprayed evenly to form a highly efficient absorption liquid curtain; the spiral guide plate 5 guides the sulfur-containing flue gas to rise along the spiral path, prolonging the contact reaction time with ammonia water, and the purified flue gas is discharged from the top of the spray tower 1; by adopting the above method, the residence time of flue gas in the spray tower 1 can be effectively extended, thereby improving the sulfur dioxide removal rate.

[0047] The second embodiment of this application is as follows: Based on the first embodiment, please refer to Figure 7 ,in, Figure 7 This is a flowchart illustrating the second embodiment of the present invention.

[0048] This invention provides a desulfurization method suitable for thermal power plants, comprising: S1 sulfur-containing flue gas is introduced into the spray tower 1 through the inlet pipe 3 by the fan; S2 ammonia water is supplied to the liquid supply pipe 4 by the water pump, and the ammonia water is atomized by the multiple spray heads 6 and sprayed uniformly to form a high-efficiency absorption liquid curtain; S3 the spiral guide plate 5 guides the sulfur-containing flue gas to rise along a spiral path, prolongs the contact reaction time with the ammonia water, and the purified flue gas is discharged from the top of the spray tower 1.

[0049] The above only discloses one or more preferred embodiments of the application, and cannot limit the scope of the application. Those skilled in the art can understand that the implementation of all or part of the above-mentioned embodiments, and the equivalent changes made according to the claims of the application, still belong to the scope covered by the application.

Claims

1. A desulfurization device suitable for thermal power plants, characterized in that, It includes a spray tower, multiple support columns, an air inlet pipe, a liquid supply pipe, a spiral guide plate, multiple nozzles, a bracket, a rotary joint, and a drive mechanism; Multiple support pillars are fixedly installed at the bottom of the spray tower; the air inlet pipe is fixedly connected to and communicates with the spray tower; the liquid supply pipe is rotatably installed inside the spray tower; the spiral guide plate is fixedly installed on the liquid supply pipe and located inside the spray tower; multiple spray nozzles are axially connected to the liquid supply pipe; the bracket is fixedly installed at the bottom of the spray tower; the rotary joint is fixedly installed on the bracket, and the rotating end of the rotary joint is fixedly connected to and communicates with the liquid supply pipe; the driving mechanism is installed on the bracket and is used to drive the liquid supply pipe to rotate.

2. The desulfurization device for thermal power plants as described in claim 1, characterized in that, The desulfurization device applicable to thermal power plants also includes crossbars; The crossbar is fixedly installed inside the spray tower and is rotatably connected to the top of the liquid supply pipe.

3. A desulfurization device suitable for thermal power plants as described in claim 2, characterized in that, The desulfurization device for thermal power plants also includes a support plate and a multi-way selector valve; The support plate is fixedly installed at the bottom of the bracket; the outlet of the multi-way selector valve is fixedly connected and communicates with the stationary end of the rotary joint; the three inlets of the multi-way selector valve are respectively connected to the ammonia supply source, the compressed gas supply source and the clean water supply source to achieve selective supply of different working media.

4. A desulfurization device suitable for thermal power plants as described in claim 3, characterized in that, The desulfurization device for thermal power plants also includes a detachable tower top, multiple installation mechanisms, an activated carbon support basket, and a suspension rod; The detachable tower top is located on the top of the spray tower; multiple installation mechanisms are respectively located on the detachable tower top; the activated carbon support basket is located inside the detachable tower top and is supported and positioned by the multiple installation mechanisms; the hanger is fixedly located on the top of the detachable tower top.

5. A desulfurization device suitable for thermal power plants as described in claim 4, characterized in that, The desulfurization device for thermal power plants also includes a sealing ring; The sealing ring is fixedly installed at the bottom of the detachable tower top.

6. A desulfurization device suitable for thermal power plants as described in claim 5, characterized in that, The desulfurization device for thermal power plants also includes multiple anti-fall pads; Multiple anti-fall pads are respectively fixedly installed at the bottom of the activated carbon support basket.

7. A desulfurization device suitable for thermal power plants as described in claim 6, characterized in that, The desulfurization device for thermal power plants also includes multiple positioning cylinders and multiple positioning rods; Multiple positioning cylinders are respectively fixedly installed on the spray tower; each positioning cylinder has an upward-facing horn-shaped inlet; multiple positioning rods are respectively fixedly installed on the detachable tower top; the end of each positioning rod is hemispherical.

8. A desulfurization device suitable for thermal power plants as described in claim 7, characterized in that, The drive mechanism includes a geared motor, a drive gear, and a driven gear; The geared motor is fixedly mounted on the bracket; the driving gear is fixedly mounted on the output end of the geared motor; the driven gear is fixedly mounted on the liquid supply pipe and meshes with the driving gear.

9. A desulfurization device suitable for thermal power plants as described in claim 8, characterized in that, The installation mechanism includes a support block, an installation cylinder, and a screw. The support block is slidably disposed on the detachable tower top and passes through the detachable tower top; the mounting cylinder is fixedly disposed on the side of the detachable tower top; the screw is rotatably connected to the support block and threadedly connected to the mounting cylinder, and passes through the mounting cylinder.

10. A desulfurization method suitable for thermal power plants, employing a desulfurization device suitable for thermal power plants as described in any one of claims 1 to 9, characterized in that, include: Sulfur-containing flue gas is drawn into the spray tower through the inlet pipe by an induced draft fan; Ammonia water supply source supplies ammonia water to the supply pipe through a water pump. The ammonia water is atomized by multiple nozzles and sprayed out evenly to form a highly efficient absorption liquid curtain. The spiral guide plate guides the sulfur-containing flue gas to rise along the spiral path, prolonging the contact reaction time with ammonia water, and the purified flue gas is discharged from the top of the spray tower.

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