System for efficiently improving utilization rate of desulfurizing agent

Abstract

The system comprises a quick lime bin, the bottom of the quick lime bin is communicated with a digester, the bottom of the digester is communicated with a bin pump, the bottom of the bin pump is communicated with a second material conveying pipe, the second material conveying pipe is provided with an electromagnetic valve, one end of the second material conveying pipe is communicated with a slaked lime bin, and the other end of the second material conveying pipe is provided with an electromagnetic valve. The bottom of the slaked lime bin communicates with a connecting hose, and one end of the connecting hose communicates with a feeding box. The invention relates to the technical field of desulfurization. By additionally arranging a pipeline, one pellet desulfurization system and four sintering desulfurization systems are connected in series to form a complete system, so that the whole-process efficient utilization of a desulfurizing agent can be realized, and pellet ash is conveyed into the sintering desulfurization systems for secondary utilization for flue gas desulfurization; the method not only solves the problems of low utilization rate of the desulfurizer in the pellet desulfurization system and incomplete resource utilization of the desulfurized fly ash, but also reduces the use amount of fresh slaked lime in the sintering desulfurization system and lowers the cost of the desulfurizer.

Description

Technical Field

[0001] This invention relates to the field of desulfurization technology, specifically a system for efficiently improving the utilization rate of desulfurizing agents. Background Technology

[0002] In most steel plants, SO2 emissions from the pelletizing and sintering process account for nearly 70% of total emissions, requiring a highly efficient desulfurization system. Due to differences in the types and qualities of raw materials used in the pelletizing and sintering processes, the SO2 concentrations in the emitted flue gas differ, thus affecting the operation of the desulfurization systems. For pelletizing flue gas desulfurization systems, the high sulfur content of the treated flue gas necessitates higher requirements for the quality and dosage of desulfurizing agents to ensure compliance with emission standards. Therefore, pelletizing desulfurization systems face problems such as high desulfurizing agent costs and low utilization rates. The resulting desulfurization ash (referred to as pellet ash) not only generates large quantities but also has a high content of effective components (20-30%) that is difficult to fully utilize. Conversely, sintering flue gas desulfurization systems treat flue gas with lower sulfur content, requiring lower-quality desulfurizing agents. Therefore, using traditional slaked lime as a desulfurizing agent leads to excessively high desulfurization costs.

[0003] Existing desulfurization systems for pelletizing and sintering face problems such as high desulfurization costs, low utilization of desulfurizing agents, and insufficient resource utilization of desulfurization ash.

[0004] Therefore, the present invention provides a system for efficiently improving the utilization rate of desulfurizing agents to solve the above problems. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a system for efficiently improving the utilization rate of desulfurizing agents, thus solving the aforementioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a system for efficiently improving the utilization rate of desulfurizing agent, comprising a quicklime silo, a digester connected to the bottom of the quicklime silo, a silo pump connected to the bottom of the digester, a second feed pipe connected to the bottom of the silo pump, a solenoid valve mounted on the second feed pipe, a slaked lime silo connected to one end of the second feed pipe, a connecting hose connected to the bottom of the slaked lime silo, a feeding box connected to one end of the connecting hose, a base plate fixedly connected to the bottom of the feeding box, a circulating fluidized bed desulfurization tower connected to the top of the feeding box, a discharge pipe connected to the top of the circulating fluidized bed desulfurization tower, a fixed plate fixedly connected to the top of the base plate, and a storage silo fixedly connected to the top of the fixed plate.

[0007] Preferably: a filter chamber is fixedly connected to the inner wall of the storage chamber, a crushing mechanism is provided inside the filter chamber, a filter screen is fixedly connected to the inner wall of the filter chamber, a micro centrifugal washing device is fixedly connected to the inner wall of the filter chamber, a connecting vertical pipe is connected to the bottom of the micro centrifugal washing device, and an atmosphere tube furnace is connected to the bottom of the connecting vertical pipe.

[0008] Preferably, the crushing mechanism includes an electric rotating rod, one end of which is fixedly connected to the inside of the filter chamber, and a crushing roller is fixedly connected to the side wall of the electric rotating rod.

[0009] Preferably, a discharge port is provided on one side of the filter chamber, and a debris storage box is fixedly connected to the side wall of the filter chamber.

[0010] Preferably, an electric push rod is fixedly connected inside the filter chamber, and a sliding push plate is fixedly connected to one end of the electric push rod. The bottom of the sliding push plate is slidably connected to the top of the filter screen.

[0011] Preferably, the inner wall of the discharge port is fixedly connected to a fixed inclined plate, and the longitudinal section of the fixed inclined plate is triangular.

[0012] Preferably, a second conveying pump is fixedly connected inside the storage silo, and a third conveying pipe is connected to the bottom of the second conveying pump. One end of the third conveying pipe is connected to the top of the quicklime silo.

[0013] Preferably, a storage bin is fixedly connected to the top of the base plate, and a first conveying pump is fixedly connected inside the storage bin. One end of the first conveying pump is connected to a first conveying pipe, and one end of the first conveying pipe is connected to the top of the quicklime bin. Beneficial effects

[0014] This invention provides a system for efficiently improving the utilization rate of desulfurizing agents. Compared with existing technologies, it has the following advantages: (1) This system for efficiently improving the utilization rate of desulfurizing agent, by adding pipelines, connects one pellet desulfurization system and four sintering desulfurization systems in series to form a complete system. It can realize the efficient utilization of desulfurizing agent throughout the entire process, transporting pellet ash to the sintering desulfurization system for secondary use in flue gas desulfurization. This not only solves the problems of low desulfurizing agent utilization rate and incomplete resource utilization of desulfurization ash in the pellet desulfurization system, but also reduces the amount of fresh slaked lime used in the sintering desulfurization system and lowers the cost of desulfurizing agent.

[0015] (2) This system, which efficiently improves the utilization rate of desulfurizing agent, can repurify and refine gypsum particles in the debris into quicklime by means of the coordinated operation of an electric rotating rod, crushing roller, filter screen, micro centrifugal washing device, and atmosphere tube furnace when the debris inside the circulating fluidized bed desulfurization tower is discharged through the discharge pipe. This facilitates subsequent use of the equipment and further reduces the loss of quicklime in the equipment. At the same time, other debris can be stored by setting up a debris storage box to prevent other debris from entering the storage box and contaminating the quicklime. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a system for efficiently improving the utilization rate of desulfurizing agent according to the present invention; Figure 2 This is a schematic diagram of the position system of the solenoid valve of the present invention; Figure 3 This is a schematic diagram of the position system of the crushing roller of the present invention; Figure 4 This is a schematic diagram of the position structure of the fixed inclined plate of the present invention; Figure 5 This is a schematic diagram of the position and structure of the atmosphere tube furnace of the present invention; Figure 6 This is a schematic diagram of the location and structure of the miniature centrifugal washing device of the present invention.

[0017] In the diagram: 1. Base plate; 2. Storage silo; 3. First feed pump; 4. First feed pipe; 5. Quicklime silo; 6. Digester; 7. Silo pump; 8. Second feed pipe; 9. Solenoid valve; 10. Hydrated lime silo; 11. Connecting hose; 12. Feed box; 13. Circulating fluidized bed desulfurization tower; 14. Discharge pipe; 15. Fixed plate; 16. Storage silo; 17. Filter silo; 18. Electric rotating rod; 19. Crushing roller; 20. Electric push rod; 21. Sliding push plate; 22. Filter screen; 23. Discharge port; 24. Fixed inclined plate; 25. Debris storage box; 26. Miniature centrifugal washing device; 27. Connecting vertical pipe; 28. Atmosphere tube furnace; 29. ​​Second feed pump; 30. Third feed pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0019] Please see Figure 1 - Figure 6A system for efficiently improving the utilization rate of desulfurizing agent includes a quicklime silo 5, a digester 6 connected to the bottom of the quicklime silo 5, a silo pump 7 connected to the bottom of the digester 6, a second conveying pipe 8 connected to the bottom of the silo pump 7, a solenoid valve 9 installed on the second conveying pipe 8, a slaked lime silo 10 connected to one end of the second conveying pipe 8, a connecting hose 11 connected to the bottom of the slaked lime silo 10, a feeding box 12 connected to one end of the connecting hose 11, a bottom plate 1 fixedly connected to the bottom of the feeding box 12, a circulating fluidized bed desulfurization tower 13 connected to the top of the feeding box 12, a discharge pipe 14 connected to the top of the circulating fluidized bed desulfurization tower 13, a fixing plate 15 fixedly connected to the top of the bottom plate 1, and a storage silo 16 fixedly connected to the top of the fixing plate 15.

[0020] It should be noted that this equipment is equipped with additional pipelines to connect one pellet desulfurization system and four sintering desulfurization systems in series into a complete system, which can realize the efficient utilization of desulfurizing agent throughout the entire process. The first feed pump 3 is started, and the first feed pump 3 injects the pellet ash inside the storage silo 2 into the slaked lime silo 10 through the first feed pipe 4. In this way, the staff does not need to use other equipment to transport the pellet ash to a high place and then deliver it into the slaked lime silo 10. The quicklime silo 5 injects the quicklime inside the digester 6 and starts the digester 6 to digest the quicklime. The silo pump 7 is started, and the silo pump 7 injects the digested quicklime in the digester 6 into the slaked lime silo 10 through the second feed pipe 8. The digested quicklime reacts with the pellet ash to desulfurize. At the same time, the pellet ash and the digested quicklime are transported into the circulating fluidized bed desulfurization tower 13 through the connecting hose 11 and the feeding box 12. The circulating fluidized bed desulfurization tower 13 is started, and the circulating fluidized bed desulfurization tower 13 further desulfurizes the pellet ash, thereby improving the desulfurization efficiency of the equipment. When the circulating fluidized bed desulfurization tower 13 has completed desulfurization, the gas and reaction debris inside the circulating fluidized bed desulfurization tower 13 are discharged through the discharge pipe 14.

[0021] In an optional embodiment: a filter chamber 17 is fixedly connected to the inner wall of the storage chamber 16, the filter chamber 17 is provided with a crushing mechanism, a filter screen 22 is fixedly connected to the inner wall of the filter chamber 17, a micro centrifugal washing device 26 is fixedly connected to the inner wall of the filter chamber 17, a connecting vertical pipe 27 is connected to the bottom of the micro centrifugal washing device 26, and an atmosphere tube furnace 28 is connected to the bottom of the connecting vertical pipe 27.

[0022] It should be noted that when the crushed reaction debris falls to the top of the filter screen 22, the smaller lime particles in the crushed reaction debris will enter the micro centrifugal washing device 26 due to gravity, while other debris will remain on the top of the filter screen 22, thus achieving screening and separation. After the lime particles enter the micro centrifugal washing device 26, the centrifuge inside the micro centrifugal washing device 26 is started. The centrifuge mixes the lime fragments with water and rotates them. With the help of centrifugal force, the lime particles settle at the bottom of the micro centrifugal washing device 26. The brine passes through the filter paper into the supernatant. The brine is repeatedly added and centrifuged until the salt content in the brine is reduced to a minimum. Then, the washed lime sample is injected into the atmosphere tube furnace 28 through the connecting vertical pipe 27. At this time, the atmosphere tube furnace 28 is started. The atmosphere tube furnace 28 heats and calcines the lime sample, calcining the gypsum into quicklime, and then discharges it into the storage chamber 16 for storage.

[0023] In an optional embodiment: the crushing mechanism includes an electric rotating rod 18, one end of which is fixedly connected to the inside of the filter chamber 17, and a crushing roller 19 is fixedly connected to the side wall of the electric rotating rod 18.

[0024] It should be noted that when the reaction debris is discharged from the discharge pipe 14 and falls into the storage bin 16, the electric rotating rod 18 is started. The electric rotating rod 18 drives the crushing roller 19 to rotate, crushing the falling reaction debris into small particles.

[0025] In an optional embodiment: a discharge port 23 is provided on one side of the filter chamber 17, and a debris storage box 25 is fixedly connected to the side wall of the filter chamber 17.

[0026] It should be noted that by setting up the debris storage box 25, other debris pushed out by the sliding pusher 21 can be collected and stored, preventing debris from falling into the storage chamber 16 and mixing with quicklime.

[0027] In an optional embodiment: an electric push rod 20 is fixedly connected inside the filter chamber 17, one end of the electric push rod 20 is fixedly connected to a sliding push plate 21, and the bottom of the sliding push plate 21 is slidably connected to the top of the filter screen 22.

[0028] It should be noted that as the filter screen 22 operates for a period of time, the debris on the top of the filter screen 22 gradually accumulates. When the electric push rod 20 is activated, it drives the sliding push plate 21 to push out the debris from the top of the filter screen 22, preventing the debris from clogging the filter screen 22 and affecting its filtration efficiency.

[0029] In an optional embodiment: a fixed inclined plate 24 is fixedly connected to the inner wall of the discharge port 23, and the longitudinal section of the fixed inclined plate 24 is triangular.

[0030] It should be noted that by setting a fixed inclined plate 24 with a triangular longitudinal section, it is possible to prevent debris inside the filter chamber 17 from being discharged from the discharge port 23 and contaminating the quicklime inside the storage chamber 16 when there is no external interference.

[0031] In an optional embodiment: a second conveying pump 29 is fixedly connected inside the storage bin 16, and a third conveying pipe 30 is connected to the bottom of the second conveying pump 29. One end of the third conveying pipe 30 is connected to the top of the quicklime bin 5.

[0032] It should be noted that after the quicklime is prepared, the second feed pump 29 is started. The second feed pump 29 injects the quicklime inside the storage bin 16 into the quicklime bin 5 through the third feed pipe 30. In this way, the equipment can purify the gypsum and reduce the lime loss of the equipment.

[0033] In an optional embodiment: a storage bin 2 is fixedly connected to the top of the base plate 1, a first conveying pump 3 is fixedly connected inside the storage bin 2, one end of the first conveying pump 3 is connected to a first conveying pipe 4, and one end of the first conveying pipe 4 is connected to the top of the quicklime bin 10.

[0034] It should be noted that the staff can first put the sintering flue gas into the pellet desulfurization system for desulfurization. After the pellet desulfurization system has completed the desulfurization of the flue gas, a large amount of pellet ash will be generated. Then the staff can drive a transport vehicle to collect and transport the pellet ash. When the staff drive the transport vehicle to move the pellet ash to storage silo 2, the staff can directly put the pellet ash into the storage silo 2, reducing the labor intensity of the staff.

[0035] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0036] During operation, this equipment is equipped with additional pipelines to connect one pellet desulfurization system and four sintering desulfurization systems in series and parallel into a complete system, which can realize the efficient utilization of desulfurizing agent throughout the entire process. Workers can first put the sintering flue gas into the pellet desulfurization system for desulfurization. After the pellet desulfurization system has completed the desulfurization of the flue gas, a large amount of pellet ash will be generated. Then, workers can drive a transport vehicle to collect and transport the pellet ash. When workers drive the transport vehicle to move the pellet ash to storage silo 2, they can directly put the pellet ash into the storage silo 2, reducing the labor intensity of workers. The first feed pump 3 is started, and the first feed pump 3 injects the pellet ash inside the storage silo 2 into the slaked lime silo 10 through the first feed pipe 4. In this way, the staff does not need to use other equipment to transport the pellet ash to a high place and then into the slaked lime silo 10. The quicklime silo 5 injects the quicklime inside the digester 6 and starts the digester 6 to digest the quicklime. The silo pump 7 is started, and the silo pump 7 injects the digested quicklime inside the digester 6 into the slaked lime silo 10 through the second feed pipe 8. The digested quicklime reacts with the pellet ash to desulfurize. At the same time, the pellet ash and the digested quicklime are transported into the circulating fluidized bed desulfurization tower 13 through the connecting hose 11 and the feeding box 12. The circulating fluidized bed desulfurization tower 13 is started, and the circulating fluidized bed desulfurization tower 13 further desulfurizes the pellet ash, thereby improving the desulfurization efficiency of the equipment. When the circulating fluidized bed desulfurization tower 13 has completed desulfurization, the gas and reaction debris inside the circulating fluidized bed desulfurization tower 13 are discharged through the discharge pipe 14. When the reaction debris is discharged from the discharge pipe 14 and falls into the storage bin 16, the electric rotating rod 18 is started. The electric rotating rod 18 drives the crushing roller 19 to rotate, crushing the falling reaction debris into small particles. When the broken reaction debris falls to the top of the filter screen 22, the smaller lime particles broken in the reaction debris will enter the micro centrifugal washing device 26 due to gravity, while other debris will remain on the top of the filter screen 22, thus achieving screening and separation. After the lime particles enter the micro centrifugal washing device 26, the centrifuge inside the micro centrifugal washing device 26 is started. The centrifuge mixes the lime fragments with water and rotates. With the help of centrifugal force, the lime particles settle at the bottom of the micro centrifugal washing device 26. The brine passes through the filter paper into the supernatant. The brine is repeatedly added and centrifuged until the salt content in the brine is reduced to the minimum. Then, the washed lime sample is injected into the atmosphere tube furnace 28 through the connecting vertical pipe 27. At this time, the atmosphere tube furnace 28 is started. The atmosphere tube furnace 28 heats and calcines the lime sample to calcine the gypsum into quicklime, and then discharges it into the storage chamber 16 for storage. As the filter screen 22 operates for a period of time, the debris on the top of the filter screen 22 gradually accumulates. When the electric push rod 20 is activated, the electric push rod 20 drives the sliding push plate 21 to push out the debris on the top of the filter screen 22, preventing the debris from clogging the filter screen 22 and affecting the filtration efficiency of the filter screen 22. By setting up a debris storage box 25, other debris pushed out by the sliding pusher 21 can be collected and stored, preventing debris from falling into the storage chamber 16 and mixing with quicklime. By setting a fixed inclined plate 24 with a triangular longitudinal section, it is possible to prevent debris inside the filter chamber 17 from being discharged from the discharge port 23 and contaminating the quicklime inside the storage chamber 16 when there is no external interference. Once the quicklime is prepared, the second feed pump 29 is started. The second feed pump 29 injects the quicklime inside the storage bin 16 into the quicklime bin 5 through the third feed pipe 30. In this way, the equipment can purify the gypsum and reduce the lime loss of the equipment.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A system for efficiently improving the utilization of desulfurizing agent, comprising a quicklime bin (5), characterized in that: The quicklime bin (5) bottom is communicated with a digester (6), the digester (6) bottom is communicated with bin pump (7), the bin pump (7) bottom is communicated with second feed pipe (8), the second feed pipe (8) is equipped with solenoid valve (9), the second feed pipe (8) one end is communicated with the slaked lime bin (10), the slaked lime bin (10) bottom is communicated with the connecting hose (11), the connecting hose (11) one end is communicated with the feed tank (12), the feed tank (12) bottom fixedly connected with the bottom plate (1), the feed tank (12) top is communicated with circulating fluidized bed desulfurization tower (13), the circulating fluidized bed desulfurization tower (13) top is communicated with the discharge pipe (14), the bottom plate (1) top fixedly connected with the fixed plate (15), the fixed plate (15) top fixedly connected with the storage bin (16).

2. The system for efficiently improving the utilization rate of a desulfurizing agent according to claim 1, characterized in that: The storage bin (16) inner wall is fixedly connected with filter bin (17), the filter bin (17) is equipped with crushing mechanism, the filter bin (17) inner wall is fixedly connected with filter screen (22), the filter bin (17) inner wall is fixedly connected with micro centrifugal water washing device (26), the micro centrifugal water washing device (26) bottom is communicated with connecting vertical pipe (27), the connecting vertical pipe (27) bottom is communicated with atmosphere tube furnace (28).

3. The system for efficiently improving the utilization rate of a desulfurizing agent according to claim 1, characterized in that: The crushing mechanism includes electric rotating rod (18), one end of the electric rotating rod (18) is fixedly connected with the filter bin (17) inside, the electric rotating rod (18) side wall is fixedly connected with crushing roller (19).

4. The system for efficiently improving the utilization rate of a desulfurizing agent according to claim 1, characterized in that: The filter bin (17) one side is provided with discharge port (23), the filter bin (17) side wall is fixedly connected with the sundry storage tank (25).

5. The system for improving the utilization of desulfurizer according to claim 2, characterized in that: The filter bin (17) inside is fixedly connected with electric push rod (20), one end of the electric push rod (20) is fixedly connected with sliding push plate (21), the sliding push plate (21) bottom is slidably connected with the filter screen (22) top.

6. The system for improving the utilization of desulfurizer according to claim 4, characterized in that: The discharge port (23) inner wall is fixedly connected with fixed inclined plate (24), the fixed inclined plate (24) longitudinal section is triangular.

7. The system for efficiently improving the utilization rate of a desulfurizing agent according to claim 1, characterized in that: The storage bin (16) inside is fixedly connected with second feed pump (29), the second feed pump (29) bottom is communicated with third feed pipe (30), one end of the third feed pipe (30) is communicated with the quicklime bin (5) top.

8. The system for efficiently improving the utilization rate of a desulfurizing agent according to claim 1, characterized in that: The bottom plate (1) top is fixedly connected with storage bin (2), the storage bin (2) inside is fixedly connected with first feed pump (3), one end of the first feed pump (3) is communicated with first feed pipe (4), one end of the first feed pipe (4) is communicated with the slaked lime bin (10) top.

Images