Device for reducing free acid by conditioning concentrated solution of cyclone

Abstract

The invention relates to the technical field of ammonia desulfurization equipment, in particular to a device for reducing free acid by conditioning a concentrated solution of a hydrocyclone, which comprises the hydrocyclone and a centrifugal separator, a conditioning stirring tank is arranged between the hydrocyclone and the centrifugal separator, the liquid outlet end of the hydrocyclone and the liquid inlet end of the conditioning stirring tank are communicated with a first liquid conveying pipe, and the first liquid conveying pipe is communicated with a second liquid conveying pipe. The liquid outlet end of the hardening and tempering stirring tank and the liquid inlet end of the centrifugal separator communicate with a second liquid conveying pipe, a feeding top cover assembly is arranged on the outer wall of the top of the hardening and tempering stirring tank, and a centrifugal stirring shaft is rotationally installed on the inner wall of the top of the centrifugal separator; cyclone separation of the slurry is carried out through the cyclone, the cyclone separation is mainly carried out according to the density difference of different components in materials, gas, liquid and solid phases are preliminarily separated, most solid particle impurities can be removed, the treated slurry is input into the tempering stirring tank, and the slurry is conveyed into the tempering stirring tank. A proper amount of chemical reagent is added in the tempering stirring tank in the tempering process, so that the pH value of the slurry can be accurately adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of ammonia desulfurization equipment, and in particular to a device for reducing free acid by conditioning concentrated liquid in a cyclone. Background Art

[0002] Ammonia-based desulfurization (FGD) is a highly efficient and environmentally friendly flue gas desulfurization (FGD) technology. Its research and application have a long history. Initially, people discovered that ammonia has excellent absorption properties for sulfur dioxide and that ammonia and sulfur dioxide can react rapidly and effectively. Based on these chemical properties, they began exploring its application in FGD. Early FGD processes were relatively simple, with issues such as poor ammonia escape control and insufficient system stability. However, with the continuous advancement of chemical technology and automated control technology, FGD has made significant progress in process optimization and equipment improvement. For example, by improving the structural design of the absorption tower, optimizing the addition and distribution of ammonia, and strengthening the oxidation process, FGD has effectively improved desulfurization efficiency and reduced ammonia escape rates, allowing FGD to mature and become a highly competitive FGD technology.

[0003] In the current ammonia-based desulfurization process, the control of free acid has always been a critical and difficult problem to solve. Excessive free acid content can bring many adverse effects, such as possible corrosion of equipment, shortening equipment service life, and affecting the stable operation of the entire desulfurization system. Existing ammonia-based desulfurization process equipment does not have the ability to load and stir the materials in an integrated manner, and manual handling and feeding are required during operation, which is inconvenient.

[0004] In order to solve the above problems, the present invention proposes a device for reducing free acid by conditioning the cyclone concentrate. Summary of the Invention

[0005] (1) Technical problems to be solved The purpose of the present invention is to overcome the problem that the control of free acid in the ammonia desulfurization process in the prior art has always been a key and difficult problem to solve; excessively high free acid content will bring many adverse effects, such as possible corrosion of equipment, shortening the service life of the equipment, and affecting the stable operation of the entire desulfurization system; the existing ammonia desulfurization process equipment does not have the ability to link material loading and stirring, and the manual handling and feeding during operation are relatively inconvenient. In response to actual needs, a device for reducing free acid by tempering the cyclone concentrate is provided to solve the above technical problems.

[0006] (2) Technical solution In order to achieve the purpose of the present invention, the technical solution adopted by the present invention is: A device for reducing free acid by tempering cyclone concentrate comprises a cyclone and a centrifugal separator, wherein a tempering and stirring tank is provided between the cyclone and the centrifugal separator, a first liquid infusion pipe is connected to the liquid outlet end of the cyclone and the liquid inlet end of the tempering and stirring tank, and a second liquid infusion pipe is connected to the liquid outlet end of the tempering and stirring tank and the liquid inlet end of the centrifugal separator, a loading top cover assembly is provided on the top outer wall of the tempering and stirring tank, a centrifugal stirring shaft is rotatably mounted on the top inner wall of the centrifugal separator, a drive motor is installed on the top outer wall of the centrifugal separator, and the drive shaft of the drive motor is connected to the top end of the centrifugal stirring shaft, and gas injection and heat preservation assemblies are provided on the outer walls of the tempering and stirring tank and the centrifugal separator.

[0007] Preferably, the feeding top cover assembly includes a cover frame fixedly mounted on the top outer wall of the feeding port of the tempering and stirring tank, and a step groove is opened on the top inner wall of the cover frame, a stepping motor is fixedly mounted on the outer wall of one side of the top of the tempering and stirring tank, a bow-shaped frame is fixed on the top of the stepping motor output shaft, a barrel is embedded and fixed on the outer wall of the middle end of the top of the bow-shaped frame, a piston is provided inside the barrel, a connecting rod is fixed on the bottom outer wall of the piston, and a top cover is fixed on one end of the connecting rod passing through the outside of the barrel, and the outer wall of the other side of the top of the tempering and stirring tank is fixed. A resistance plate is fixed on the top, the connecting rod is located between the piston and the cylinder and is equipped with an upward spring, an air pump is installed on the outer wall of one side of the top of the bow-shaped frame, and an air intake pipe is connected to the outer wall of one side of the top end of the cylinder, one end of the air intake pipe is connected to the air delivery end of the air pump, and a first one-way valve is installed on the end of the air intake pipe, cylinders are distributed and embedded and fixed on the outer walls of the top four corners of the top cover, and a loading tray is provided at the bottom of the top cover, the bottom end of the telescopic rod of the cylinder is fixedly connected to the outer walls of the four corners of the top of the loading tray, and a linkage stirring and tempering component is provided on the bottom inner wall of the loading tray.

[0008] Preferably, the linked stirring and tempering assembly includes a tempering and stirring shaft rotatably installed on the inner walls on both sides of the loading disk, a rotating groove is distributed on the inner wall of one side of the loading disk, an impeller is rotatably installed inside the rotating groove, and the impeller and the tempering and stirring shaft are coaxially connected, a through hole is opened between the rotating grooves, an air pipe is connected to the outer wall on the other side of the top of the barrel, the end of the air pipe is connected to the inside of the rotating groove on one side, and the middle part of the air pipe passes through the middle of the top cover, a first pressure relief valve is installed on the end of the air pipe, and the loading disk is located on the outer wall of the rotating groove on the other side and is connected to the first blowing hood.

[0009] Preferably, the gas injection and heat preservation assembly includes a first turbine pump fixed on the top outer wall of the centrifuge, a second turbine pump is installed on the top outer wall of the first turbine pump, the inner impellers of the first turbine pump and the second turbine pump are coaxially connected to the drive motor, the suction end of the first turbine pump is connected to one end of the second liquid infusion pipe, the pump delivery end of the first turbine pump is connected to the pump delivery pipe, and one end of the pump delivery pipe passes through the interior of the centrifuge, the suction end of the second turbine pump is installed with a first air filter element, the pump delivery end of the second turbine pump is connected to the first air pipe, and the outer wall of the drive motor is sleeved. A spiral heat absorption tube is installed, and the spiral heat absorption tube is connected to the end of the first air tube, the other end of the spiral heat absorption tube is connected to the second air tube, a first air bag is set on the outer wall of the centrifuge, and a second air bag is set on the outer wall of the tempering and stirring tank, one end of the second air tube is connected to the interior of the first air bag, and a second one-way valve is installed at the end of the second air tube, a third air tube is connected between the first and second air bags, and a third one-way valve is installed at the end of the third air tube, a second blowing hood is installed on the outer wall of the top side of the second air bag, and a fourth one-way valve is installed at the end of the second blowing hood.

[0010] Preferably, the blowing port of the second blowing hood is located on one side of the stepping motor.

[0011] Preferably, filter plates are provided on the outer walls of both sides of the loading tray.

[0012] Preferably, a second air filter is installed at the air suction end of the air pump.

[0013] Preferably, the air delivery pipe is a telescopic hose.

[0014] Preferably, bearings are embedded in the rotational connection between the stirring shaft and the inner walls on both sides of the loading tray.

[0015] Preferably, the outer walls on both sides of the top cover are inserted into the inside of the step groove, and a sealing gasket is fitted and connected to the top inner wall of the step groove.

[0016] (3) Beneficial effects: A. This device reduces free acid by conditioning the concentrated liquid from the cyclone. The slurry undergoes cyclonic separation in the cyclone. Cyclonic separation primarily separates the gas, liquid, and solid phases based on the density differences of the different components in the material, removing most solid particulate impurities. The treated slurry is then fed into a conditioning and stirring tank. The conditioning process in the conditioning and stirring tank precisely adjusts the pH of the slurry by adding appropriate amounts of chemical reagents. After conditioning and stirring, the slurry is fed into a centrifuge through a second liquid infusion line. After conditioning and stirring, some solid impurities in the solution, such as precipitates such as calcium sulfate generated by the reaction and possible fly ash, are separated by the centrifuge. These solid impurities may adsorb or encapsulate some free acid. Separating them helps reduce the free acid content in the solution. In summary, adding conditioning and stirring after cyclonic separation in the ammonia-based desulfurization process prevents excessive pH increases in the concentrate section while also resolving the free acid problem.

[0017] B. Through the setting of the feeding top cover assembly, the cylinder is controlled to drive the feeding tray to move downward, and then the tempering chemical reagent is put into the feeding tray. The cylinder is controlled to drive the feeding tray to move upward so that the feeding tray is located below the top cover. The stepper motor is controlled to drive the bow frame and the top cover to rotate so that the top cover is located above the feeding port of the tempering and mixing tank. The air pump is controlled to input compressed air into the interior of the barrel through the air inlet pipe. The rising air pressure in the barrel drives the piston and the connecting rod to move downward, thereby driving the top cover and the feeding tray to move downward, so that the top cover is closed in the step groove of the closing frame. At this time, the feeding tray is inserted into the feeding port of the tempering and mixing tank. After closing, the cylinder is controlled to drive the feeding tray to move downward so that the feeding tray is immersed in the slurry in the tempering and mixing tank, thereby realizing the feeding of the tempering chemical reagent in the feeding tray.

[0018] C. Through the arrangement of the loading top cover assembly and the linked stirring and tempering assembly, when the top cover is closed, the air pump continues to operate and continuously injects air into the bobbin. When the air pressure in the bobbin reaches the threshold of the first pressure relief valve, the excess air is discharged through the air pipe and input into the rotating tank on one side. The input air circulates through the through holes and is input into each rotating tank and blown out through the first blowing cover on one side. During the circulation of air in the rotating tank, it impacts the impeller, driving it to rotate, thereby driving the stirring shaft in the loading tray to rotate. When the top cover is closed, the stirring shaft in the loading tray rotates in the tempering and stirring tank, achieving the tempering and stirring effect. D. Through the setting of the air injection insulation component, the centrifugal separator works by driving the centrifugal stirring shaft to rotate through the driving motor. During the rotation of the centrifugal stirring shaft, the first turbine pump and the second turbine pump can be driven to rotate synchronously. The first turbine pump works to pump the slurry in the tempering stirring tank through the second liquid delivery pipe. The pumped slurry is input into the centrifugal separator through the pump delivery pipe for centrifugal separation. The second turbine pump works to suck the external air through the first air filter element and input the air into the spiral heat absorption pipe through the first air pipe. The air in the spiral heat absorption pipe radiates heat to the driving motor. The heat generated by the machine is absorbed, and the air after absorbing heat is input into the first airbag through the second air pipe. The first airbag is inflated to cover the outer wall of the centrifuge. When the air pressure in the first airbag reaches the threshold value of the third one-way valve through continuous air injection, the excess air is input into the second airbag through the second air pipe. The second airbag is inflated to cover the outer wall of the tempering and stirring tank. The airbag inflation and covering plays the role of heat preservation of the tempering and stirring tank and the centrifugal separator, which is beneficial to the ammonia desulfurization reaction in the tempering and stirring tank and the centrifugal separator, improves the chemical reaction efficiency, and improves the efficiency of the ammonia desulfurization. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a device for reducing free acid by conditioning the cyclone concentrate according to the present invention; Figure 2 This is an enlarged structural diagram of point A in a device for reducing free acid by conditioning the cyclone concentrate of the present invention; Figure 3 This is an enlarged structural diagram of point B in a device for reducing free acid by conditioning the cyclone concentrate of the present invention; Figure 4 This is a schematic diagram of a three-dimensional cross-sectional structure of a loading tray in a device for reducing free acid by conditioning cyclone concentrate according to the present invention; Figure 5 This is an enlarged structural diagram of position C in a device for reducing free acid by conditioning the cyclone concentrate of the present invention; Figure 6 The present invention is a schematic diagram of the three-dimensional structure of a centrifugal separator in a device for reducing free acid by conditioning cyclone concentrate.

[0020] The reference numerals are as follows: 1. Cyclone; 2. Conditioning and stirring tank; 3. First liquid infusion pipe; 4. Centrifugal separator; 41. Centrifugal stirring shaft; 42. Drive motor; 5. Feeding cover assembly; 6. Linked stirring and conditioning assembly; 7. Air injection and insulation assembly; 8. Second liquid infusion pipe; 9. Filter plate; 10. Second air filter element; 501, cover frame; 502, step groove; 503, stepping motor; 504, bow frame; 505, bobbin; 506, piston; 507, connecting rod; 508, top cover; 509, upward spring; 510, air pump; 511, air inlet pipe; 512, first one-way valve; 513, air cylinder; 514, loading tray; 515, contact plate; 601, tempering and stirring shaft; 602, rotating trough; 603, impeller; 604, through hole; 605, air pipe; 606, first pressure relief valve; 607, first blowing hood; 701, first turbopump; 702, second turbopump; 703, pump pipe; 704, first air filter; 705, first air pipe; 706, spiral heat absorption pipe; 707, second air pipe; 708, first air bag; 709, second air bag; 710, second one-way valve; 711, third air pipe; 712, third one-way valve; 713, second air blow hood; 714, fourth one-way valve. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0022] The following is combined with Figure 1-6 The present invention is further described with examples: In this embodiment, Figure 1-6As shown, a device for reducing free acid by tempering cyclone concentrate includes a cyclone 1 and a centrifuge 4, a tempering and stirring tank 2 is provided between the cyclone 1 and the centrifuge 4, a first liquid infusion pipe 3 is connected to the liquid outlet end of the cyclone 1 and the liquid inlet end of the tempering and stirring tank 2, a second liquid infusion pipe 8 is connected to the liquid outlet end of the tempering and stirring tank 2 and the liquid inlet end of the centrifuge 4, a feeding top cover assembly 5 is provided on the top outer wall of the tempering and stirring tank 2, a centrifugal stirring shaft 41 is rotatably mounted on the top inner wall of the centrifuge 4, a driving motor 42 is installed on the top outer wall of the centrifuge 4, and the driving shaft of the driving motor 42 is connected to the top end of the centrifugal stirring shaft 41, and an air injection and insulation assembly 7 is provided on the outer walls of the tempering and stirring tank 2 and the centrifuge 4. In the ammonia desulfurization process, cyclone separation of the slurry is performed by the cyclone 1, and cyclone separation is mainly based on the density difference of different components in the material. The gas-liquid-solid three phases are initially separated to remove most of the solid particle impurities. The treated slurry is input into the tempering and stirring tank 2 through the first liquid infusion pipe 3. The tempering process in the tempering and stirring tank 2 can accurately adjust the pH of the slurry by adding an appropriate amount of chemical reagents (such as ammonia or other alkaline regulators). The slurry after tempering and stirring is input into the centrifuge 4 through the second liquid infusion pipe 8. After tempering and stirring, some solid impurities in the solution, such as precipitates such as calcium sulfate generated by the reaction and possible fly ash, can be separated out by the centrifuge 4. These solid impurities may adsorb or wrap some free acids. Separating them helps to reduce the free acid content in the solution. In summary, adding tempering and stirring after cyclone separation in the ammonia desulfurization process will not cause the pH of the concentration section to increase excessively, and can also solve the free acid problem at the same time.

[0023] In this embodiment, refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4The feeding top cover assembly 5 includes a cover frame 501 fixedly mounted on the top outer wall of the feeding port of the tempering and stirring tank 2, and a step groove 502 is provided on the top inner wall of the cover frame 501, a stepping motor 503 is fixedly mounted on the outer wall of one side of the top of the tempering and stirring tank 2, a bow frame 504 is fixed on the top of the output shaft of the stepping motor 503, a barrel 505 is embedded and fixed on the outer wall of the middle end of the top of the bow frame 504, a piston 506 is provided inside the barrel 505, a connecting rod 507 is fixed on the outer wall of the bottom of the piston 506, and the connecting rod 507 is fixed on one end of the outer tube 505 to be fixed with a top cover 508, a contact plate 515 is fixed on the outer wall of the other side of the top of the tempering and stirring tank 2, and the connecting rod 507 is located between the piston 506 and the barrel 505 and is sleeved with an upper 514. The air pump 510 is installed on the outer wall of one side of the top of the bow frame 504. The outer wall of one side of the top of the bobbin 505 is connected with an air inlet pipe 511. One end of the air inlet pipe 511 is connected to the air delivery end of the air pump 510, and a first non-return valve 512 is installed at the end of the air inlet pipe 511. Cylinders 513 are fixed on the outer walls of the four corners of the top of the top cover 508. A loading tray 514 is provided at the bottom of the top cover 508. The bottom end of the telescopic rod of the cylinder 513 is fixedly connected to the outer walls of the four corners of the top of the loading tray 514. A linkage stirring and tempering component 6 is provided on the inner wall of the bottom of the loading tray 514. After the slurry is subjected to the cyclone separation treatment by the cyclone 1, the slurry is input into the tempering and stirring tank 2 through the first liquid infusion pipe 3 for tempering and stirring treatment. Figure 1 When the top cover 508 is open, the cylinder 513 is controlled to drive the loading tray 514 to move downward, and then the tempering chemical reagent (such as ammonia or other alkaline conditioning powder) is added to the loading tray 514. The cylinder 513 is controlled to drive the loading tray 514 to move upward, so that the loading tray 514 is located below the top cover 508. The stepper motor 503 is controlled to drive the bow frame 504 and the top cover 508 to rotate, so that the top cover 508 is located above the feeding port of the tempering and stirring tank 2. The air pump 510 is controlled to input compressed air into the interior of the barrel 505 through the air inlet pipe 511. The rising air pressure in the barrel 505 drives the piston 506 and the connecting rod 507 to move downward, thereby driving the top cover 508 and the loading tray 514 to move downward, so that the top cover 508 is covered in the step groove 502 of the covering frame 501. At this time, the loading tray 514 is inserted into the feeding port of the tempering and stirring tank 2. The setting of the first one-way valve 512 prevents the backflow of gas in the barrel 505 and ensures the covering of the top cover 508. After covering, the control cylinder 513 is operated to drive the loading tray 514 to move downward, so that the loading tray 514 is immersed in the slurry in the tempering and stirring tank 2, thereby realizing the feeding of the tempering chemical reagent in the loading tray 514.

[0024] Furthermore, filter plates 9 are provided on the outer walls on both sides of the loading tray 514. Later, the cylinder 513 can be controlled to drive the loading tray 514 to move upward, and the stepper motor 503 can be controlled to drive the top cover 508 to open. The loading tray 514 and the filter plate 9 act as filter frames. The upward movement of the filter frame plays a role in filtering and extracting impurities in the solution after tempering and stirring.

[0025] Furthermore, a second air filter element 10 is installed at the air intake end of the air pump 510 , and the air inhaled by the air pump 510 is filtered through the second air filter element 10 .

[0026] Furthermore, the outer walls on both sides of the top cover 508 are inserted into the interior of the step groove 502, and a sealing gasket is attached to the top inner wall of the step groove 502 to ensure the sealing of the top cover 508 and effectively prevent the volatilization and escape of ammonia water in the tempering and stirring tank 2 during the ammonia desulfurization operation.

[0027] In this embodiment, refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 The linkage stirring and tempering component 6 includes a tempering and stirring shaft 601 that is distributed and rotatably installed on the inner walls of both sides of the loading disk 514. A rotating groove 602 is distributed on the inner wall of one side of the loading disk 514. An impeller 603 is rotatably installed inside the rotating groove 602, and the impeller 603 and the tempering and stirring shaft 601 are coaxially connected. A through hole 604 is opened between the rotating grooves 602. An air supply pipe 605 is connected to the outer wall on the other side of the top of the barrel 505. The end of the air supply pipe 605 is connected to the inside of the rotating groove 602 on one side, and the middle part of the air supply pipe 605 passes through the middle of the top cover 508. A first pressure relief valve 606 is installed at the end of the air supply pipe 605. The loading disk 514 is located on the outer wall of the rotating groove 602 on the other side and is connected to the first blowing Air hood 607, after the above-mentioned top cover 508 is closed, the air pump 510 continues to work and continuously injects air into the bobbin 505. When the air pressure in the bobbin 505 reaches the threshold value of the first pressure relief valve 606, the excess air is discharged through the air pipe 605 and input into the rotating groove 602 on one side. The input air circulates through the through hole 604 and is input into each rotating groove 602, and is blown out through the first blowing hood 607 on one side. During the circulation process in the rotating groove 602, the air will impact the impeller 603 and drive it to rotate, thereby driving the tempering and stirring shaft 601 in the loading tray 514 to rotate. When the top cover 508 is closed, the tempering and stirring shaft 601 in the loading tray 514 rotates in the tempering and stirring tank 2, thereby playing the role of tempering and stirring.

[0028] Furthermore, the gas pipe 605 is a telescopic hose, so that the gas pipe 605 can adapt to the expansion and contraction during the lifting and lowering of the loading tray 514 below the top cover 508, which is beneficial to the gas supply of the gas pipe 605.

[0029] Furthermore, bearings are embedded in the rotational connection between the tempering and stirring shaft 601 and the inner walls of both sides of the loading tray 514. The arrangement of the bearings enables the tempering and stirring shaft 601 to rotate more smoothly.

[0030] In this embodiment, refer to Figure 1 、 Figure 2 、 Figure 5 and Figure 6The gas injection and heat preservation assembly 7 includes a first turbine pump 701 fixed on the top outer wall of the centrifuge 4, a second turbine pump 702 is installed on the top outer wall of the first turbine pump 701, the inner impellers of the first turbine pump 701 and the second turbine pump 702 are coaxially connected to the drive motor 42, the suction end of the first turbine pump 701 is connected to one end of the second liquid infusion pipe 8, the pump delivery end of the first turbine pump 701 is connected to the pump delivery pipe 703, and one end of the pump delivery pipe 703 passes through the interior of the centrifuge 4, the suction end of the second turbine pump 702 is installed with a first air filter element 704, the pump delivery end of the second turbine pump 702 is connected to the first air pipe 705, and the outer wall of the drive motor 42 is provided with a spiral heat absorption pipe 70 6, and the spiral heat absorption tube 706 is connected to the end of the first air pipe 705, the other end of the spiral heat absorption tube 706 is connected to the second air pipe 707, the outer wall of the centrifugal separator 4 is provided with a first air bag 708, the outer wall of the tempering and stirring tank 2 is provided with a second air bag 709, one end of the second air pipe 707 is connected to the interior of the first air bag 708, and the end of the second air pipe 707 is provided with a second one-way valve 710, the first air bag 708 and the second air bag 709 are connected with a third air pipe 711, and the end of the third air pipe 711 is provided with a third one-way valve 712, a second blowing hood 713 is installed on the outer wall of the top side of the second air bag 709, and a fourth one-way valve 712 is installed on the end of the second blowing hood 713 Valve 714, during the use of the device for tempering the cyclone concentrate to reduce the free acid, the centrifuge 4 works by driving the centrifugal stirring shaft 41 to rotate through the drive motor 42. During the rotation of the centrifugal stirring shaft 41, the first turbine pump 701 and the second turbine pump 702 can be synchronously driven to rotate. The first turbine pump 701 works to pump the slurry in the tempering stirring tank 2 through the second liquid delivery pipe 8. The pumped slurry is input into the centrifuge 4 through the pump delivery pipe 703 for centrifugal separation. The second turbine pump 702 works to suck external air through the first air filter element 704, and inputs the air into the spiral heat absorption pipe 706 through the first air pipe 705. The spiral heat absorption is carried out by heat radiation. The air in the tube 706 absorbs the heat generated by the operation of the drive motor 42, and the air after absorbing heat is input into the first air bag 708 through the second air pipe 707. The first air bag 708 is inflated to cover the outer wall of the centrifuge 4. When the air pressure in the first air bag 708 reaches the threshold value of the third one-way valve 712 through continuous air injection, the excess air is input into the second air bag 709 through the third air pipe 711. The second air bag 709 is inflated to cover the outer wall of the tempering and stirring tank 2. The air bag inflation and covering plays the role of heat preservation of the tempering and stirring tank 2 and the centrifuge 4, which is beneficial to the ammonia desulfurization reaction in the tempering and stirring tank 2 and the centrifuge 4, improves the chemical reaction efficiency, and improves the efficiency of the ammonia desulfurization.

[0031] Furthermore, the blowing port of the second blowing hood 713 is located on one side of the stepper motor 503. During the continuous injection process of the above-mentioned second turbine pump 702, when the air pressure in the second air bag 709 reaches the threshold value of the fourth one-way valve 714, the excess air is blown out through the second blowing hood 713 to dissipate heat for the stepper motor 503.

[0032] Working principle: When the present invention is in use, the device for reducing free acid by conditioning the cyclone concentrate is used. In the ammonia desulfurization process, the slurry is subjected to cyclone separation through the cyclone 1. The cyclone separation is mainly based on the density difference of different components in the material, and the gas, liquid and solid three phases are initially separated to remove most of the solid particle impurities. The treated slurry is input into the conditioning stirring tank 2 through the first infusion pipe 3. The conditioning process in the conditioning stirring tank 2 can accurately adjust the pH value of the slurry by adding an appropriate amount of chemical reagents (such as ammonia or other alkaline regulators). After conditioning and stirring, the slurry is input into the centrifugal separator through the second infusion pipe 8. In the centrifuge 4, after conditioning and stirring, some solid impurities in the solution, such as precipitates such as calcium sulfate generated by the reaction and possible fly ash, etc., can be separated out by the centrifuge 4. These solid impurities may adsorb or wrap some free acids. Separating them out helps to reduce the free acid content in the solution. In summary, adding conditioning and stirring after cyclone separation in the ammonia desulfurization process will not cause the pH of the concentration section to rise too much, and can also solve the free acid problem. After the cyclone separation treatment of the slurry by the cyclone 1, the slurry is input into the conditioning and stirring tank 2 through the first liquid infusion pipe 3 for conditioning and stirring treatment. Figure 1When the top cover 508 is open, the cylinder 513 is controlled to drive the loading tray 514 to move downward, and then the tempering chemical reagent (such as ammonia or other alkaline conditioning powder) is added to the loading tray 514. The cylinder 513 is controlled to drive the loading tray 514 to move upward, so that the loading tray 514 is located below the top cover 508. The stepper motor 503 is controlled to drive the bow frame 504 and the top cover 508 to rotate, so that the top cover 508 is located above the feeding port of the tempering and stirring tank 2. The air pump 510 is controlled to input compressed air into the interior of the barrel 505 through the air inlet pipe 511. The rising air pressure in the barrel 505 drives the piston 506 and the connecting rod 507 to move downward. , thereby driving the top cover 508 and the loading tray 514 to move downward, so that the top cover 508 is covered in the step groove 502 of the covering frame 501, and the loading tray 514 is inserted into the feeding port of the conditioning and stirring tank 2. The setting of the first one-way valve 512 prevents the backflow of the gas in the barrel 505, ensuring the covering of the top cover 508. After covering, the control cylinder 513 is operated to drive the loading tray 514 to move downward, so that the loading tray 514 is immersed in the slurry in the conditioning and stirring tank 2, realizing the feeding of the conditioning chemical reagent in the loading tray 514. After the slurry is subjected to the cyclone separation treatment by the cyclone 1, the slurry is input into the conditioning and stirring tank 2 through the first liquid infusion pipe 3 for conditioning and stirring treatment. Figure 1When the top cover 508 is open, the cylinder 513 is controlled to drive the loading tray 514 to move downward, and then the tempering chemical reagent (such as ammonia or other alkaline conditioning powder) is added to the loading tray 514. The cylinder 513 is controlled to drive the loading tray 514 to move upward, so that the loading tray 514 is located below the top cover 508. The stepper motor 503 is controlled to drive the bow frame 504 and the top cover 508 to rotate, so that the top cover 508 is located above the feeding port of the tempering and stirring tank 2. The air pump 510 is controlled to input compressed air into the interior of the barrel 505 through the air inlet pipe 511, and the air pressure in the barrel 505 rises. The piston 506 and the connecting rod 507 are driven to move downward, thereby driving the top cover 508 and the loading tray 514 to move downward, so that the top cover 508 is covered in the step groove 502 of the covering frame 501. At this time, the loading tray 514 is inserted into the feeding port of the tempering and stirring tank 2. The setting of the first one-way valve 512 prevents the backflow of the gas in the barrel 505, ensuring the covering of the top cover 508. After covering, the control cylinder 513 is operated to drive the loading tray 514 to move downward, so that the loading tray 514 is immersed in the slurry in the tempering and stirring tank 2, realizing the feeding of the tempering chemical reagent in the loading tray 514. The operation of the centrifuge 4 is driven by the drive motor 42 to drive the centrifuge 4. The centrifugal stirring shaft 41 rotates, and the centrifugal stirring shaft 41 can synchronously drive the first turbine pump 701 and the second turbine pump 702 to rotate during the rotation process. The first turbine pump 701 works to pump the slurry in the tempering stirring tank 2 through the second liquid infusion pipe 8, and the pumped slurry is input into the centrifuge 4 through the pump infusion pipe 703 for centrifugal separation. The second turbine pump 702 works to suck external air through the first air filter 704, and input the air into the spiral heat absorption pipe 706 through the first air pipe 705. The air in the spiral heat absorption pipe 706 absorbs the heat generated by the drive motor 42 through heat radiation. The air after absorbing heat is input into the first air bag 708 through the second air pipe 707, and the first air bag 708 is inflated to cover the outer wall of the centrifuge 4. When the air pressure in the first air bag 708 reaches the threshold value of the third one-way valve 712 through continuous air injection, the excess air is input into the second air bag 709 through the third air pipe 711, and the second air bag 709 is inflated to cover the outer wall of the tempering and stirring tank 2. The air bag inflation and covering plays the role of heat preservation of the tempering and stirring tank 2 and the centrifuge 4, which is beneficial to the ammonia desulfurization reaction in the tempering and stirring tank 2 and the centrifuge 4, thereby improving the chemical reaction efficiency and the efficiency of the ammonia desulfurization.

[0033] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A device for reducing free acid by conditioning cyclone concentrate, characterized by: The invention comprises a cyclone (1) and a centrifugal separator (4), wherein a tempering and stirring tank (2) is provided between the cyclone (1) and the centrifugal separator (4), a first liquid infusion pipe (3) is connected between the liquid outlet end of the cyclone (1) and the liquid inlet end of the tempering and stirring tank (2), a second liquid infusion pipe (8) is connected between the liquid outlet end of the tempering and stirring tank (2) and the liquid inlet end of the centrifugal separator (4), a feeding top cover assembly (5) is provided on the top outer wall of the tempering and stirring tank (2), a centrifugal stirring shaft (41) is rotatably mounted on the top inner wall of the centrifugal separator (4), a driving motor (42) is installed on the top outer wall of the centrifugal separator (4), a driving shaft of the driving motor (42) is connected to the top end of the centrifugal stirring shaft (41), and an air injection and heat preservation assembly (7) is provided on the outer walls of the tempering and stirring tank (2) and the centrifugal separator (4).

2. The device for reducing free acid by conditioning the cyclone concentrate according to claim 1, characterized in that: The feeding cover assembly (5) comprises a cover frame (501) fixedly mounted on the outer wall of the top of the feeding port of the tempering and stirring tank (2), and a step groove (502) is provided on the inner wall of the top of the cover frame (501), a stepping motor (503) is fixedly mounted on the outer wall of one side of the top of the tempering and stirring tank (2), a bow frame (504) is fixed on the top of the output shaft of the stepping motor (503), a barrel (505) is embedded and fixed on the outer wall of the middle end of the top of the bow frame (504), a piston (506) is provided inside the barrel (505), a connecting rod (507) is fixed on the outer wall of the bottom of the piston (506), and a top cover (508) is fixed on one end of the connecting rod (507) that passes through the outside of the barrel (505), and a contact plate (51) is fixed on the outer wall of the other side of the top of the tempering and stirring tank (2). 5), the connecting rod (507) is located between the piston (506) and the barrel (505) and is provided with an upward spring (509), an air pump (510) is installed on the outer wall of one side of the top of the bow frame (504), an air inlet pipe (511) is connected to the outer wall of one side of the top of the barrel (505), one end of the air inlet pipe (511) is connected to the air delivery end of the air pump (510), and a first one-way valve (512) is installed at the end of the air inlet pipe (511), cylinders (513) are distributed and fixed on the outer walls of the four corners of the top of the top cover (508), a loading tray (514) is provided at the bottom of the top cover (508), the bottom end of the telescopic rod of the cylinder (513) is fixedly connected to the outer walls of the four corners of the top of the loading tray (514), and a linkage stirring and tempering component (6) is provided on the inner wall of the bottom of the loading tray (514).

3. The device for reducing free acid by conditioning the cyclone concentrate according to claim 2, characterized in that: The linkage stirring and tempering assembly (6) comprises a tempering stirring shaft (601) which is rotatably mounted on the inner walls of both sides of the loading plate (514); a rotating groove (602) is distributed on the inner wall of one side of the loading plate (514); an impeller (603) is rotatably mounted inside the rotating groove (602); the impeller (603) and the tempering stirring shaft (601) are coaxially connected; a through hole (604) is provided between the rotating grooves (602); An air supply pipe (605) is connected to the outer wall on the other side of the top end of the bobbin (505), and the end of the air supply pipe (605) is connected to the inside of the rotating groove (602) on one side, and the middle of the air supply pipe (605) passes through the middle of the top cover (508). A first pressure relief valve (606) is installed at the end of the air supply pipe (605), and the loading tray (514) is connected to the first blowing hood (607) on the outer wall of the rotating groove (602) on the other side.

4. The device for reducing free acid by conditioning the cyclone concentrate according to claim 1, characterized in that: The gas injection and heat preservation component (7) includes a first turbine pump (701) fixed on the top outer wall of the centrifugal separator (4), a second turbine pump (702) is installed on the top outer wall of the first turbine pump (701), the inner impellers of the first turbine pump (701) and the second turbine pump (702) are coaxially connected to the drive motor (42), the suction end of the first turbine pump (701) is connected to one end of the second liquid delivery pipe (8), the pump delivery end of the first turbine pump (701) is connected to the pump delivery pipe (703), and one end of the pump delivery pipe (703) passes through the interior of the centrifugal separator (4), the suction end of the second turbine pump (702) is installed with a first air filter element (704), the pump delivery end of the second turbine pump (702) is connected to the first air pipe (705), and the outer wall of the drive motor (42) is provided with a spiral heat absorption pipe (706). The spiral heat absorption tube (706) is connected to the end of the first air tube (705), and the other end of the spiral heat absorption tube (706) is connected to the second air tube (707). A first air bag (708) is mounted on the outer wall of the centrifuge (4), and a second air bag (709) is mounted on the outer wall of the tempering and stirring tank (2). One end of the second air tube (707) is connected to the interior of the first air bag (708), and a second one-way valve (710) is installed at the end of the second air tube (707). A third air tube (711) is connected between the first air bag (708) and the second air bag (709), and a third one-way valve (712) is installed at the end of the third air tube (711). A second blowing hood (713) is installed through the outer wall of one side of the top of the second air bag (709), and a fourth one-way valve (714) is installed at the end of the second blowing hood (713).

5. The device for reducing free acid by conditioning the cyclone concentrate according to claim 4, characterized in that: The blowing port of the second blowing hood (713) is located on one side of the stepping motor (503).

6. The device for reducing free acid by conditioning the cyclone concentrate according to claim 2, characterized in that: Filter plates (9) are provided on the outer walls of both sides of the loading tray (514).

7. The device for reducing free acid by conditioning the cyclone concentrate according to claim 2, characterized in that: A second air filter element (10) is installed at the air intake end of the air pump (510).

8. The device for reducing free acid by conditioning the cyclone concentrate according to claim 3, characterized in that: The air delivery pipe (605) is a telescopic hose.

9. The device for reducing free acid by conditioning the cyclone concentrate according to claim 3, characterized in that: Bearings are embedded and installed at the rotational connection points between the tempering and stirring shaft (601) and the inner walls of both sides of the loading plate (514).

10. The device for reducing free acid by conditioning the cyclone concentrate according to claim 2, characterized in that: The outer walls on both sides of the top cover (508) are inserted into the interior of the step groove (502), and a sealing gasket is fitted and connected to the top inner wall of the step groove (502).

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