Resourceful treatment system and method for steam stripping condensate

Abstract

The invention discloses a steam stripping condensate resourceful treatment system and a steam stripping condensate resourceful treatment method. Comprising a stripping tower for stripping original condensate, a separation tank for separating a gas-liquid mixture obtained by the stripping tower, recovery equipment for recovering sulfur from non-condensable steam obtained by separation of the separation tank, and a desulfurization tower for performing flue gas desulfurization by utilizing the stripped condensate obtained by separation of the separation tank, the steam stripping condensate resourceful treatment system can perform resourceful treatment on wastewater generated in the ammonia synthesis process, reduces the original ammonia water consumption, and has the dual advantages of environmental protection, emission reduction and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of condensate resource utilization technology, specifically to a stripping condensate resource utilization system and method. Background Technology

[0002] In the coal chemical ammonia and methanol production processes, the stripping condensate obtained after stripping separation of the original condensate from the sulfur-resistant shift conversion section has significant drawbacks in traditional treatment methods due to its high corrosiveness and complex composition. For example, attempts were made to reuse it as slurry water in the gasification section, but this led to accelerated aging of the diaphragm of the high-pressure coal slurry pump and pipeline corrosion, seriously threatening system safety.

[0003] Current technologies lack an economically efficient resource recovery pathway. While the ammonia-based desulfurization process, utilizing a plant's own thermal power plant, has the potential to handle ammonia nitrogen, directly inputting sulfur-containing condensate can lead to sulfides interfering with the desulfurization reaction, equipment blockage, and byproduct pollution. Therefore, there is an urgent need to develop a targeted system structure that, while ensuring equipment corrosion resistance, achieves both ammonia nitrogen resource recovery and harmless separation of sulfides. Ideally, the desulfurization equipment should integrate anti-clogging scraping and solid-liquid separation mechanisms to address issues such as sulfur deposition blockage, uncontrolled crystallization, and corrosion risks. Summary of the Invention

[0004] Therefore, the present invention provides a system and method for the resource utilization of stripping condensate.

[0005] The technical solution of the present invention is: a stripping condensate resource utilization system, wherein the stripping condensate is a liquid obtained by stripping and separating the original condensate generated in the sulfur-resistant conversion process of synthetic ammonia and methanol in the coal chemical production of the plant area. The stripping condensate contains ammonia nitrogen and sulfides. The plant area is equipped with a self-owned thermal power plant, which is equipped with a desulfurization tower using the ammonia method flue gas desulfurization process.

[0006] The stripping condensate resource recovery system includes a stripping tower for stripping the original condensate, a cooler for cooling the stripping tower to obtain a gas-liquid mixture, a separation tank for separating the gas-liquid mixture cooled by the cooler, a recovery device for recovering sulfur from the non-condensable vapor obtained from the separation tank, and a desulfurization tower for using the stripping condensate obtained from the separation tank to desulfurize flue gas. The desulfurization tower is provided with a baffle plate, a first sieve plate, and a second sieve plate arranged in parallel from top to bottom.

[0007] The desulfurization tower is provided with an inlet for feeding stripping condensate between the partition and the first screen plate, an inlet for feeding flue gas to be treated between the second screen plate and the bottom of the desulfurization tower, an outlet for discharging treated stripping condensate between the partition and the top of the desulfurization tower, and a purified flue gas outlet at the top of the desulfurization tower.

[0008] The desulfurization tower is equipped with a cylindrical component that penetrates the partition plate, the first sieve plate, and the second sieve plate. The outer wall of the cylindrical component is rotatably limited by the partition plate. The cylindrical component includes an inner cylinder and a cylindrical ring that is rotatably sleeved outside the inner cylinder. The inner wall of the inner cylinder between the second sieve plate and the bottom of the desulfurization tower is provided with a plurality of first through holes, and filter screens are provided on the first through holes. The cylindrical ring is used to scrape off solid particles outside the filter screens, and the cylindrical ring is driven to rotate by a motor installed in the desulfurization tower.

[0009] Both the first sieve plate and the second sieve plate are provided with a plurality of second through holes, and each second through hole is provided with a packing element, the packing element including a semi-circular block and a spring for connecting the semi-circular block to the second sieve plate;

[0010] The air inlet is located below the cylinder, and the inner wall of the desulfurization tower below the air inlet is fixed with several inclined plates to prevent the lower solid particles from spreading upward. The bottom of the desulfurization tower is provided with a solid-liquid mixing outlet for concentrating solid particles.

[0011] Description: By configuring the stripping tower, separation tank, recovery equipment, and desulfurization tower in the above-mentioned stripping condensate resource recovery system, the wastewater generated during ammonia synthesis can be treated for resource recovery, achieving comprehensive benefits of high efficiency, environmental protection, and resource recycling. The desulfurization tower adopts a layered sieve plate and cylindrical structure, using baffles to separate the reaction zone and sieve plates to extend the gas-liquid contact time. Combined with dynamic packing components (semi-circular blocks + springs) to enhance turbulent mass transfer, the desulfurization efficiency is significantly improved to over 99%. The inner cylinder filter screen intercepts elemental sulfur, and the outer cylinder ring rotates to scrape away deposits, effectively preventing blockage and ensuring long-term stable operation. The inclined plate below the air inlet and the bottom solid-liquid discharge port reduce the diffusion of solid particles and lower maintenance costs. The system uses ammonia nitrogen in the stripping liquid as a desulfurizing agent to replace purchased ammonia water. The sulfides are recovered and co-fired for power generation, solving the corrosiveness problem of condensate while realizing resource utilization, reducing the original ammonia water consumption, and possessing the dual advantages of environmental protection and emission reduction as well as economic benefits.

[0012] Furthermore, the inner cylinder is provided with a rotating wheel fixed to the cylindrical ring; a toothed ring is fixedly sleeved on the top of the cylindrical ring, and a gear that meshes with the toothed ring is provided inside the desulfurization tower; the gear is rotatably connected to the inner wall of the desulfurization tower through the top end of the rotating rod.

[0013] The bottom end of the rotating rod passes through the partition and the first sieve plate, and a stirring element is provided on the rotating rod located between the partition and the first sieve plate; a cam disk for intermittently agitating the semi-circular block is provided on the rotating rod located between the first sieve plate and the second sieve plate.

[0014] Explanation: The aforementioned gear ring and gear configuration enables the agitator and cam disc to rotate simultaneously with the rotation of the drum ring. The rotation of the drum ring continuously cleans the deposits on the filter screen surface, preventing clogging. The agitator on the rotating rod promotes uniform liquid flow distribution between the baffle and the first sieve plate, improving reaction efficiency. The cam disc intermittently moves the semi-circular block, causing dynamic vibration of the packing components, enhancing gas-liquid turbulent mass transfer, significantly improving desulfurization efficiency, achieving automated cleaning and optimized mass transfer, and ensuring long-term stable operation of the system.

[0015] Furthermore, the semicircular block is provided with multiple small holes, and the second sieve plate is provided with multiple guide rods that are paired with the multiple small holes for unblocking.

[0016] Explanation: By matching the small holes on the semicircular block with the guide rod of the second sieve plate, the automatic unblocking function of the packing material channels is realized. When the small holes are blocked by sulfur or solid particles, the guide rod can be inserted into the small holes for mechanical cleaning as the cam disc intermittently moves the semicircular block up and down, thus avoiding obstruction of airflow or liquid flow in the process of improving gas-liquid mass transfer.

[0017] Furthermore, the filling component also includes a mesh cover disposed under each second through hole, the mesh cover having a cleaning ring inside for cleaning the inner wall of the mesh cover, and the semi-circular block being connected to the cleaning ring via a connecting rod.

[0018] Note: The cleaning ring described above enables automatic cleaning of the inner wall of the mesh cover: when the semicircular block is driven to swing by the cam disc, it drives the cleaning ring to move synchronously, scraping off the sulfur or particulate matter deposited inside the mesh cover and preventing blockage of the through holes; the combination of the mesh cover and the cleaning ring not only ensures the smoothness of gas-liquid contact, but also reduces the need for manual intervention through mechanical cleaning.

[0019] Furthermore, the mesh cover is provided with a mesh cover base plate, which is rotatably connected to the mesh cover via a torsion spring, and the cleaning ring is provided with a lever for rotating and opening the mesh cover base plate.

[0020] Note: The above settings enable the bottom surface of the mesh cover to rotate and open. When the cleaning ring moves, the lever moves the bottom surface of the mesh cover to rotate and open around the torsion spring, automatically discharging the accumulated sulfur or solid particles inside the mesh cover and preventing the through holes from becoming blocked. The elastic design of the torsion spring ensures that the bottom surface will reset and close when there is no external force, maintaining the structural stability of the mesh cover and further enhancing the anti-clogging performance of the mesh cover.

[0021] Furthermore, the stripping condensate resource recovery system also includes a recovery tower located before the desulfurization tower. The recovery tower is used to pre-treat the stripping condensate obtained from the separation tank to recover sulfur. The outlet of the recovery tower is connected to a filter press. The filtrate obtained from the filter press is transported to the desulfurization tower, and the filter cake obtained from the filter press is recovered.

[0022] Explanation: The above-mentioned recovery tower performs sulfur recovery pretreatment on the stripping condensate, reducing the load on the subsequent desulfurization tower and minimizing the impact of corrosive substances; the filter press separates the pretreated material into filtrate (containing ammonia nitrogen) and filter cake (containing elemental sulfur). The filtrate is recycled to the desulfurization tower as a desulfurizing agent to replace part of the ammonia water, reducing reagent costs, while the filter cake is recycled to achieve closed-loop utilization of sulfur resources; thereby reducing waste emissions and transforming valuable components in the condensate into economic benefits through resource recovery.

[0023] Furthermore, the recovery tower is a bubble column reactor, and the recovery equipment is a Claus sulfur recovery unit or an oxidation reactor.

[0024] A method for the resource recovery and treatment of stripping condensate, based on the above-mentioned stripping condensate resource recovery and treatment system, includes the following steps:

[0025] S1. The original condensate is stripped using a stripping tower to obtain a gas-liquid mixture; the total ammonia content in the original condensate is 2-3 wt%.

[0026] S2. The gas-liquid mixture is first cooled to 70-80°C by a cooler, and then the non-condensable vapor and stripping condensate in the gas-liquid mixture are separated by a separator.

[0027] S3. Non-condensable steam is transported to the recovery equipment for sulfur recovery treatment. The stripping condensate is transported to the recovery tower for pretreatment to obtain a mixed liquid. The mixed liquid is processed by a filter press to obtain solid elemental sulfur and pretreated stripping condensate. The solid elemental sulfur is sent to the power plant coal storage for co-firing treatment. The pretreated stripping condensate is transported to the desulfurization tower and used to desulfurize the sulfur-containing flue gas.

[0028] S4. The pretreated stripping condensate enters the desulfurization tower through the liquid inlet, while the air inlet is opened to introduce the flue gas to be treated. The stripping condensate is stirred by the agitator and passes through the first screen plate to fully contact the flue gas to be treated in the packing. The sulfur-containing flue gas is desulfurized by the stripping condensate. Then, part of the stripping condensate falls through the inclined plate to the bottom of the desulfurization tower, and the other part of the treated stripping condensate passes through the filter screen into the inner cylinder and is finally discharged through the liquid outlet.

[0029] Note: The above method, through the design of steps such as stripping, cooling separation, sulfur recovery, pretreatment and pressure filtration, realizes the full-process resource utilization and harmless treatment of stripping condensate with high ammonia nitrogen and high sulfide, taking into account both environmental protection and emission reduction and economic benefits (reducing desulfurization costs and recovering sulfur elemental benefits), while ensuring the safe and stable operation of the system.

[0030] The beneficial effects of this invention are:

[0031] The stripping condensate resource recovery system of this invention can treat wastewater generated during ammonia synthesis in a resource-based manner, achieving comprehensive benefits of high efficiency, environmental protection, and resource recycling. The desulfurization tower adopts a layered sieve plate and cylindrical structure, combined with packing components to enhance turbulent mass transfer, significantly improving desulfurization efficiency. The inner cylinder filter screen intercepts elemental sulfur, while the outer cylinder ring rotates to scrape away deposits, effectively preventing clogging and ensuring long-term stable operation. Inclined plates reduce the diffusion of solid particles, lowering maintenance costs. The system uses ammonia nitrogen from the stripping liquid as a desulfurizing agent to replace purchased ammonia water, and the sulfides are recovered and co-fired for power generation, solving the corrosiveness problem of the condensate while achieving resource utilization, reducing the original ammonia water consumption, and possessing the dual advantages of environmental protection and emission reduction as well as economic benefits. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the system flow according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the device appearance according to an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0035] Figure 4 This is a schematic diagram of the cylindrical component structure in Embodiment 1 of the present invention;

[0036] Figure 5 This is a schematic diagram of the internal structure of Embodiment 1 of the present invention;

[0037] Figure 6 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention;

[0038] Figure 7 This is a schematic diagram of the packing component in Embodiment 2 of the present invention;

[0039] Figure 8 This is an exploded view of the packing component in Embodiment 2 of the present invention;

[0040] Figure 9 This is a schematic diagram of the structure of the mesh cover in Embodiment 2 of the present invention;

[0041] Among them, 1-desulfurization tower, 11-liquid inlet, 12-air inlet, 13-solid-liquid mixture outlet, 14-purified flue gas outlet, 15-liquid outlet, 16-baffle, 161-stirring component, 17-first screen plate, 171-cam plate, 172-semi-circular block, 173-spring, 174-lever, 175-cleaning ring, 176-mesh cover, 177-torsion spring, 18-second screen plate, 2-cylinder, 21-inner cylinder, 22-filter screen, 23-gear ring, 231-rotor, 232-gear, 24-cylinder ring, 3-stripping tower, 31-cooler, 4-separation tank, 5-recovery equipment. Detailed Implementation

[0042] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0043] Example 1:

[0044] like Figure 1 As shown, a stripping condensate resource utilization system is provided. The stripping condensate is a liquid obtained by stripping and separating the original condensate generated during the sulfur-resistant conversion process of synthetic ammonia and methanol in the coal chemical production of the plant. The stripping condensate contains ammonia nitrogen and sulfides. The plant is equipped with a self-owned thermal power plant, which is equipped with a desulfurization tower 1 using the ammonia method for flue gas desulfurization.

[0045] The stripping condensate resource recovery system includes a stripping tower 3 for stripping the original condensate, a cooler 31 for cooling the stripping tower 3 to obtain a gas-liquid mixture, a separation tank 4 for separating the gas-liquid mixture cooled by the cooler 31, a recovery device 5 for recovering sulfur from the non-condensable vapor separated by the separation tank 4, and a desulfurization tower 1 for using the stripping condensate separated by the separation tank 4 for flue gas desulfurization.

[0046] like Figure 2 , Figure 3 , Figure 5 As shown, the desulfurization tower 1 is provided with a partition plate 16, a first sieve plate 17 and a second sieve plate 18 arranged in parallel from top to bottom;

[0047] The desulfurization tower 1 is provided with an inlet 11 for feeding stripping condensate between the partition 16 and the first sieve plate 17, an inlet 12 for feeding flue gas to be treated between the second sieve plate 18 and the bottom of the desulfurization tower 1, an outlet 15 for discharging treated stripping condensate between the partition 16 and the top of the desulfurization tower 1, and a purified flue gas outlet 14 at the top of the desulfurization tower 1.

[0048] like Figure 4 As shown, the desulfurization tower 1 is provided with a cylindrical component 2 that penetrates the partition plate 16, the first screen plate 17, and the second screen plate 18. The outer wall of the cylindrical component 2 is rotatably limited to the partition plate 16 (this rotatable limiting connection adopts the method of rotating the annular groove on the outer wall of the cylindrical component 2 and the convex ring on the partition plate 16). The cylindrical component 2 includes an inner cylinder 21 and a cylindrical ring 24 rotatably sleeved outside the inner cylinder 21. The inner wall of the inner cylinder 21 between the second screen plate 18 and the bottom end of the desulfurization tower 1 is provided with a plurality of first through holes, and filter screens 22 are provided on the first through holes. The cylindrical ring 24 is used to scrape off solid particles outside the filter screen 22, and the cylindrical ring 24 is driven to rotate by a motor installed in the desulfurization tower 1.

[0049] like Figure 5As shown, both the first sieve plate 17 and the second sieve plate 18 are provided with a plurality of second through holes, and each second through hole is provided with a packing component. The packing component includes a semi-circular block 172 and a spring 173 for connecting the semi-circular block 172 to the second sieve plate 18 (the spring is a spring body that only extends and retracts vertically, such as a spring rod).

[0050] The air inlet 12 is located below the cylinder 2, and the inner wall of the desulfurization tower 1 below the air inlet 12 is fixedly provided with a number of inclined plates 25 (a gap is left between the inclined plates 25 to allow solid particles to pass through and fall down and to block some solid particles from rising to the top of them, and the size of the gap is moderate, ranging from 0.5 to 2 cm in this embodiment). The bottom of the desulfurization tower 1 is provided with a solid-liquid mixing outlet 13 for concentrating solid particles.

[0051] The inner cylinder 21 is provided with a rotating wheel 231 fixed to the cylindrical ring 24; a toothed ring 23 is fixedly sleeved on the top of the cylindrical ring 24; the desulfurization tower 1 is provided with a gear 232 that meshes with the toothed ring 23 for transmission; the gear 232 is rotatably connected to the inner wall of the desulfurization tower 1 through the top end of the rotating rod.

[0052] The bottom end of the rotating rod passes through the partition 16 and the first sieve plate 17. A stirring element 161 is provided on the rotating rod located between the partition 16 and the first sieve plate 17. A cam disk 171 for intermittently agitating the semi-circular block 172 is provided on the rotating rod located between the first sieve plate 17 and the second sieve plate 18.

[0053] The semicircular block 172 is provided with multiple small holes, and the second sieve plate 18 is provided with multiple guide rods that are used for unblocking, one-to-one with the multiple small holes.

[0054] The stripping condensate resource recovery system also includes a recovery tower located before the desulfurization tower 1. The recovery tower is used to pre-treat the stripping condensate obtained from the separation tank 4 to recover sulfur. The outlet of the recovery tower is connected to a filter press. The filtrate obtained from the filter press is transported to the desulfurization tower 1, and the filter cake obtained from the filter press is recovered.

[0055] The recovery tower adopts a bubble tower reactor, and the recovery equipment 5 adopts a Claus sulfur recovery unit.

[0056] The working principle of the above device is as follows:

[0057] First, such as Figure 1 As shown, after the original condensate is separated by stripping tower 3, the non-condensable steam is used to recover elemental sulfur through the Claus reactor, while the stripping condensate is pretreated in a bubble column recovery tower to further reduce the sulfide content. The pretreated liquid is separated into solid elemental sulfur (for co-firing and power generation) and filtrate by a filter press. The filtrate is sent to desulfurization tower 1 as a desulfurizing agent to replace part of the ammonia water.

[0058] After the filtrate enters the desulfurization tower 1, the motor is turned on. The cylinder 2 is driven by the motor to rotate the cylinder ring 24 to scrape off the deposits on the filter screen 22. Through the meshing transmission of the toothed ring 23 and the gear 232, the rotating rod is rotated. The rotating rod drives the stirring element 161 to rotate and stir, and evenly distribute the liquid flow. At the same time, the cam disk 171 on the rotating rod intermittently moves the semi-circular block 172, causing the semi-circular block 172 to move up and down. The through rod clears the small holes on the semi-circular block 172, thereby improving mass transfer and preventing clogging.

[0059] By combining the multi-layer structure of the sieve plate with the inclined plate, a dynamic turbulent mass transfer environment is formed, which can efficiently remove sulfur dioxide from the flue gas while avoiding solid particle blockage. This ensures that the solid particles are concentrated near the solid-liquid mixing outlet 13, thus guaranteeing the stable operation of the system.

[0060] Example 2: This example differs from Example 1 in that the recycling device 5 uses an oxidation reactor, such as... Figure 6 , Figure 7 , Figure 8 , Figure 9 As shown, the filling component also includes a mesh cover 176 disposed under each second through hole. The mesh cover 176 is provided with a cleaning ring 175 for cleaning the inner wall of the mesh cover 176. The semi-circular block 172 is connected to the cleaning ring 175 by a connecting rod.

[0061] The mesh cover 176 is provided with a mesh cover base plate, which is rotatably connected to the mesh cover 176 via a torsion spring 177. The cleaning ring 175 is provided with a lever 174 for rotating and opening the mesh cover base plate.

[0062] The working method of this embodiment is largely the same as that of embodiment 1, except that:

[0063] When the cam disc 171 intermittently moves the semicircular block 172, the semicircular block 172 moves up and down, and through the connecting rod connected to the semicircular block 172, it drives the cleaning ring 175 to move up and down inside the screen 176. The cleaning ring 175 scrapes away the sulfur element or solid particles deposited on the inner wall of the screen 176. At the same time, the lever 174 on the cleaning ring moves the bottom surface of the screen 176, causing the bottom surface of the screen 176 to rotate and open around the torsion spring 177, allowing the solid particles to fall out. When there is no external force, the torsion spring 177 returns the bottom surface to its original position and closes, maintaining the structural stability of the screen 176. This avoids blockage, ensures gas-liquid contact efficiency, reduces the need for manual intervention, and improves the long-term reliability and resource utilization effect of the desulfurization system.

[0064] Example 3:

[0065] This embodiment provides a method for resource-based treatment of stripping condensate using the stripping condensate resource recovery system of Embodiment 1, including the following steps:

[0066] S1. The original condensate is stripped using stripping tower 3 to obtain a gas-liquid mixture; the total ammonia content in the original condensate is 2-3 wt%, and the sulfide content is 300±5 ppm;

[0067] S2. The gas-liquid mixture is first cooled to 70-80°C by cooler 31, and then the non-condensable vapor and stripping condensate in the gas-liquid mixture are separated by separator 4.

[0068] S3. The non-condensable steam is transported to the recovery equipment 5 for sulfur recovery treatment. The stripping condensate is transported to the recovery tower for pretreatment to obtain a mixed liquid. The mixed liquid is processed by a filter press to obtain solid elemental sulfur and pretreated stripping condensate. The solid elemental sulfur is sent to the power plant coal storage for co-firing treatment. The pretreated stripping condensate is transported to the desulfurization tower 1 and the stripping condensate is used to desulfurize the sulfur-containing flue gas.

[0069] S4. The pretreated stripping condensate enters the desulfurization tower 1 through the liquid inlet 11, and the flue gas to be treated is introduced through the air inlet 12. The stripping condensate is stirred by the agitator 161 and passes through the first screen plate 17 to fully contact the flue gas to be treated in the packing. The sulfur-containing flue gas is desulfurized by the stripping condensate. Then, part of the stripping condensate falls to the bottom of the desulfurization tower 1 through the inclined plate 25, and the other part of the treated stripping condensate passes through the filter screen 22 and enters the inner cylinder 21, and is finally discharged through the liquid outlet 15.

Claims

1. A stripping condensate resource recovery treatment system, characterized by, The stripping condensate resource treatment system comprises a stripping tower (3) for stripping the original condensate, a cooler (31) for cooling the gas-liquid mixture obtained from the stripping tower (3), a separation tank (4) for separating the gas-liquid mixture cooled by the cooler (31), a recovery device (5) for recovering sulfur from the non-condensable gas separated by the separation tank (4), and a desulfurization tower (1) for desulfurizing flue gas by using the stripping condensate separated by the separation tank (4); The desulfurization tower (1) is provided with a baffle (16), a first sieve plate (17) and a second sieve plate (18) arranged in parallel from top to bottom inside the desulfurization tower (1); The desulfurization tower (1) is provided with a liquid inlet (11) for feeding the stripping condensate between the baffle (16) and the first sieve plate (17), a gas inlet (12) for feeding the flue gas to be treated between the second sieve plate (18) and the bottom end of the desulfurization tower (1), a liquid outlet (15) for discharging the treated stripping condensate between the baffle (16) and the top end of the desulfurization tower (1), and a purified flue gas outlet (14) at the top of the desulfurization tower (1); The desulfurization tower (1) is provided with a cylinder (2) penetrating through the baffle (16), the first sieve plate (17) and the second sieve plate (18), and the outer wall of the cylinder (2) is rotationally limitedly connected with the baffle (16); the cylinder (2) comprises an inner cylinder (21) and a cylinder ring (24) rotationally sleeved outside the inner cylinder (21), a plurality of first through holes are arranged on the inner wall of the inner cylinder (21) between the second sieve plate (18) and the bottom end of the desulfurization tower (1), and a filter screen (22) is arranged on each first through hole; the cylinder ring (24) is used for scraping off the solid particles outside the filter screen (22), and the cylinder ring (24) is driven to rotate by a motor arranged in the desulfurization tower (1); A plurality of second through holes are arranged on the first sieve plate (17) and the second sieve plate (18), and a filler (172) is arranged on each second through hole; the filler (172) comprises a semicircular block (172) and a spring (173) for connecting the semicircular block (172) with the second sieve plate (18); The gas inlet (12) is located below the cylinder (2), and a plurality of inclined plates (25) for preventing the upward diffusion of the lower solid particles are fixedly arranged on the inner wall of the desulfurization tower (1) below the gas inlet (12); and the bottom of the desulfurization tower (1) is provided with a solid-liquid mixed discharge port (13) for collecting the solid particles.

2. A stripping condensate resource recovery system as claimed in claim 1, wherein, The inner cylinder (21) is internally provided with a rotating wheel (231) fixed with the cylinder ring (24); a gear ring (23) is fixedly sleeved on the top of the cylinder ring (24); the desulfurization tower (1) is internally provided with a gear (232) engaged with the gear ring (23) for transmission; and the gear (232) is rotationally connected with the inner wall of the desulfurization tower (1) through the top end of a rotating rod. The bottom end of the rotating rod penetrates through the partition plate (16) and the first sieve plate (17), and a stirring piece (161) is arranged on the rotating rod between the partition plate (16) and the first sieve plate (17); the rotating rod between the first sieve plate (17) and the second sieve plate (18) is provided with a cam disc (171) for intermittently driving a semicircular block (172).

3. A stripping condensate resource recovery system as claimed in claim 2, wherein, The semicircular block (172) is provided with a plurality of small holes, and the second sieve plate (18) is provided with a plurality of through rods for dredging corresponding to the plurality of small holes.

4. A stripping condensate resource recovery system as claimed in claim 2, wherein, The filler further comprises a mesh cover (176) arranged below each second through hole, and the mesh cover (176) is internally provided with a cleaning ring (175) for cleaning the inner wall of the mesh cover (176), and the semicircular block (172) and the cleaning ring (175) are connected through a connecting rod.

5. A stripping condensate resource recovery system as claimed in claim 4, wherein, The mesh cover (176) is provided with a mesh cover bottom plate, the mesh cover bottom plate is rotationally connected with the mesh cover (176) through a torsional spring (177), and the cleaning ring (175) is provided with a push rod (174) for rotating and opening the mesh cover bottom plate.

6. A stripping condensate resource recovery system as claimed in claim 1, wherein, The resource treatment system of the stripping condensate liquid further comprises a recovery tower arranged before the desulfurization tower (1), the recovery tower is used for pretreating the stripping condensate liquid separated from the separation tank (4) to recover sulfur, and the outlet of the recovery tower is connected with a filter press, the filtrate obtained by the filter press is delivered to the desulfurization tower (1), and the filter cake obtained by the filter press is recovered.

7. A stripping condensate resource recovery system as claimed in claim 6, wherein, The recovery tower adopts a bubble column reactor, and the recovery equipment (5) adopts a Claus sulfur recovery unit or an oxidation reactor.

8. A stripping condensate resource recovery system as claimed in claim 1, wherein, The stripping condensate liquid is a liquid obtained after stripping and separation of the original condensate liquid generated in the sulfur-tolerant shift process of synthetic ammonia and methanol in a coal chemical production plant, the plant is matched with a self-provided heat and power plant, and the desulfurization tower (1) is arranged in the self-provided heat and power plant.

9. A method for resourceful treatment of stripping condensate, based on a system for resourceful treatment of stripping condensate according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1, stripping the original condensate liquid by using a stripping tower (3) to obtain a gas-liquid mixture; the total ammonia content in the original condensate liquid is 2-3wt%; S2, cooling the gas-liquid mixture to 70-80 DEG C by using a cooler (31) first, and then separating the non-condensable steam from the stripping condensate liquid by using a separation tank (4); S3, delivering the non-condensable steam to a recovery equipment (5) for sulfur recovery treatment, delivering the stripping condensate liquid to a recovery tower for pretreatment to obtain a mixed liquid, treating the mixed liquid by using a filter press to obtain solid sulfur and pretreated stripping condensate liquid, delivering the solid sulfur to a coal storage of a power plant for blending and burning treatment, and delivering the pretreated stripping condensate liquid to a desulfurization tower (1); S4, the pretreated stripping condensate enters into the inside of the desulfurization tower (1) through the liquid inlet (11), and the gas inlet (12) is opened to pass the to-be-treated flue gas, the stripping condensate is stirred by the stirring part (161) in turn, passes through the first sieve plate (17) to be fully contacted with the to-be-treated flue gas in the filler part, the sulfur-containing flue gas is treated by the stripping condensate, then part of the stripping condensate falls to the bottom of the desulfurization tower (1) through the inclined plate (25), the other part of the treated stripping condensate enters into the inner cylinder (21) through the filter screen (22), and finally is discharged through the liquid outlet (15).

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