Purification treatment device for acid making and treatment process

Abstract

The invention discloses a purification treatment device for acid making and a treatment process, and belongs to the technical field of acid making equipment, the purification treatment device comprises a base, an adsorption tower located at one end of the top of the base and vertically mounted, and an air inlet pipe arranged at the bottom of the side edge of the adsorption tower. The lower grating plate and the upper grating plate are arranged in the adsorption tower, activated carbon is stored between the lower grating plate and the upper grating plate, and the spiral blades are arranged between the lower grating plate and the upper grating plate, so that the contact area between gas and the activated carbon can be increased, and the impurity removal effect is improved; in addition, in cooperation with a discharging mechanism at the bottom of a lower grating plate, a feeding mechanism at the top of an upper grating plate and a high-temperature steam regeneration mechanism between the discharging mechanism and the feeding mechanism, activated carbon at the bottom of the adsorption tower can be continuously discharged in the gas impurity removal process, then high-temperature steam regeneration is conducted, meanwhile, activated carbon is added from the top of the adsorption tower, and the adsorption efficiency is improved. Flow circulation of the activated carbon is formed, and the purification effect and the purification rate are guaranteed.

Description

Technical Field

[0001] The present invention relates to a purification treatment device, in particular to a purification treatment device for acid production. The present invention also relates to a treatment process, in particular to a purification treatment process for acid production, and belongs to the technical field of acid production equipment. Background Art

[0002] In the acid production process, the purification process is a very critical link. Its main purpose is to remove impurities in the raw gas to ensure the efficient and stable operation of the subsequent acid production process and the quality of the product. The raw gas (for example, in the process of manufacturing sulfuric acid by contact method, the raw gas is mainly a gas containing sulfur dioxide) may contain a variety of impurities, such as mineral dust, arsenic, selenium, fluorine and other compounds. Mineral dust can poison the catalyst and block pipelines and equipment; impurities such as arsenic and selenium can also poison the catalyst, resulting in a decrease in catalyst activity; fluoride can corrode equipment.

[0003] In the process of raw gas purification, the gas is first dedusted by a dust collector, then the water-soluble impurities in the gas are removed by a scrubber, and then the gas is dried by a drying tower. Finally, an adsorption tower is used to use activated carbon as an adsorbent to remove impurities such as arsenic and selenium.

[0004] Regarding the above-mentioned related technologies, the inventors believe that the following defects exist: after a certain period of use, the activated carbon will be saturated from bottom to top, and the current desorption of the activated carbon requires that the activated carbon as a whole is in a saturated state before the activated carbon can be removed and processed. After the bottom activated carbon is in a saturated state, the time for the gas to be physically adsorbed inside the activated carbon will be reduced, thereby affecting the treatment effect of impurities. In addition, when the activated carbon is taken out and replaced, the machine needs to be shut down for operation, which reduces the purification treatment rate of the exhaust gas.

[0005] Therefore, a purification treatment device and treatment process for acid production are designed to optimize the above-mentioned problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a purification treatment device and treatment process for acid production. By arranging a lower grid plate and an upper grid plate inside the adsorption tower, the activated carbon is stored between the lower grid plate and the upper grid plate, and spiral blades are arranged between the lower grid plate and the upper grid plate, which can increase the contact area between the gas and the activated carbon and improve the impurity removal effect. In addition, with the discharge mechanism at the bottom of the lower grid plate, the feeding mechanism at the top of the upper grid plate, and the high-temperature steam regeneration mechanism between the discharge mechanism and the feeding mechanism, the activated carbon at the bottom of the adsorption tower can be continuously discharged during the gas impurity removal process, and then high-temperature steam regeneration can be performed, and activated carbon can be added from the top of the adsorption tower at the same time to form a flow circulation of activated carbon, thereby ensuring the purification effect and purification rate. , and a lower baffle; and a loading mechanism composed of an upper partition, an upper turntable, a loading trough, and an upper baffle. The driving motor cooperates with the shaft to drive the lower turntable and the upper turntable at the same time, which can ensure that the discharging and feeding are carried out synchronously, and the internal capacity of the lower trough and the loading trough are the same, which can ensure the stability of the amount of activated carbon in the adsorption tower and the gas impurity removal effect. A high-temperature steam regeneration mechanism composed of a circulation pipe, a lower pipe, a discharge valve, a high-temperature steam inlet, a steam discharge pipe, a filter, a screw conveying rod, a loading pipe, a transfer bin, a drying component, and a cooling component, and a pulley mechanism is provided between the bottom end of the shaft and the screw conveying rod, which can automatically transport the discharged activated carbon upward and regenerate it with high-temperature steam, and then dry and cool the activated carbon to ensure the effect of the activated carbon use.

[0007] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0008] A purification treatment device for acid production comprises a base, an adsorption tower located at one end of the top of the base and installed vertically, an air inlet pipe opened at the bottom of the side of the adsorption tower, and an exhaust pipe opened at the top of the adsorption tower, a lower grid plate is horizontally installed at the inner bottom of the adsorption tower and located above the air inlet pipe, an upper grid plate is horizontally installed at the inner top of the adsorption tower, a positioning column is vertically installed at the middle position between the lower grid plate and the upper grid plate, a spiral blade is installed between the outer side of the positioning column and the inner wall of the adsorption tower, a drop hole is opened on the side of the lower grid plate away from the air inlet pipe, a discharge mechanism for quantitatively discharging activated carbon is provided at the bottom of the drop hole, a feed hole is provided on the upper grid plate directly above the drop hole, a loading mechanism for quantitatively adding activated carbon is provided at the top of the feed hole, and a high-temperature steam regeneration mechanism for the activated carbon is provided between the discharge mechanism and the loading mechanism.

[0009] Preferably: the discharging mechanism includes a lower partition, a lower turntable, a material discharge chute and a lower baffle, the lower partition is horizontally fixed below the lower grid plate, and the two ends of the lower partition are respectively located inside and outside the adsorption tower, the lower turntable is rotatably installed on the top of the lower partition, and the lower turntable is symmetrically provided with a material discharge chute that matches the material discharge hole, and a lower baffle that fits the top of the lower turntable is horizontally fixed on the outside of the adsorption tower.

[0010] Preferably: the feeding mechanism includes an upper partition, an upper turntable, a feeding trough and an upper baffle, the upper partition is horizontally fixed at the top of the outer side of the adsorption tower, the upper turntable is rotatably installed on the top of the upper partition, the two ends of the upper turntable are respectively located inside and outside the adsorption tower, the upper turntable is symmetrically provided with feeding troughs that cooperate with the feed holes, and the upper baffle that fits the surface of the feeding trough is horizontally installed on the top of the outer side of the adsorption tower, and the volume of the feeding trough is the same as that of the lower feeding trough.

[0011] Preferably: a driving motor is installed on the top of the base, a shaft rod is installed on the output end of the driving motor, the shaft rod passes through the lower partition, the lower turntable, the lower baffle, and the upper partition, and the shaft rod is fixedly connected to the lower turntable and the upper turntable.

[0012] Preferably: the high-temperature steam regeneration mechanism includes a circulation pipe, a discharge pipe, a discharge valve, a high-temperature steam inlet, a steam discharge pipe, a filter, a spiral conveying rod, a feeding pipe, a transfer bin, a drying component and a cooling component. The circulation pipe is vertically installed on the top of the base, a discharge pipe is installed between the bottom end of the circulation pipe and the bottom of the lower partition, the top end of the discharge pipe is connected with the discharge trough, a discharge valve is provided at the bottom of the discharge pipe, a spiral conveying rod is rotatably installed at the inner bottom end of the circulation pipe, a high-temperature steam inlet is provided at the bottom of the outer side of the circulation pipe, a steam discharge pipe is provided at the top of the outer side of the circulation pipe, a filter is provided inside the steam discharge pipe, the transfer bin is fixed on the top of the upper baffle and is connected with the feeding trough, a feeding pipe is provided between the top of the circulation pipe and the transfer bin, a drying component is installed on the top of the circulation pipe, and a cooling component is provided on the outer side of the transfer bin.

[0013] Preferably, the top end of the spiral conveying rod is lower than the horizontal plane where the top of the steam discharge pipe is located, the bottom end of the spiral conveying rod extends to below the circulation pipe, and a pulley mechanism is provided between the bottom end of the spiral conveying rod and the shaft rod.

[0014] Preferably: the drying component includes a hot air blower, an induced draft duct and exhaust holes, the hot air blower is installed at the top of the circulation tube, the induced draft duct is vertically fixed to the inner top of the circulation tube, the output end of the hot air blower is connected to the inside of the induced draft duct, and the outer side of the induced draft duct is evenly provided with exhaust holes.

[0015] Preferably: the cooling component includes a water tank, a heat conducting plate, a water inlet and a drain pipe. The water tank is fixed on the outside of the transfer bin. Heat conducting plates are evenly arranged inside the water tank, and one end of the heat conducting plates extends to the inside of the transfer bin. A water inlet is arranged at the top of the outside of the water tank, and a drain pipe is arranged at the bottom of the outside of the water tank.

[0016] Preferably, a spiral tube is wound around the outer side of the feed tube, a drain port is provided at the bottom end of the spiral tube, and the top end of the spiral tube is connected to the drain pipe.

[0017] The present invention also provides a purification process for acid production, comprising the following steps:

[0018] Step 1: The raw gas after dust removal, washing and drying is injected into the adsorption tower from the inside of the air inlet pipe. The raw gas flows from bottom to top through the activated carbon and is guided by spiral blades to increase the residence time inside the activated carbon to adsorb impurities such as arsenic and selenium.

[0019] Step 2: The activated carbon at the bottom of the adsorption tower will be saturated first. Therefore, during the activated carbon adsorption process, the lower turntable is slowly started by the driving motor. After the feed trough on the lower turntable is aligned with the feed hole, the activated carbon at the bottom of the adsorption tower that has been saturated may flow into the feed trough. As the lower turntable continues to rotate, the activated carbon is transferred to the outside of the adsorption tower and flows into the circulation pipe through the feed pipe. At the same time, when the driving motor is started, the upper turntable will be driven to rotate, and the activated carbon in the transfer bin will be transferred to the inside of the adsorption tower to replenish the discharged activated carbon to ensure that the total amount of activated carbon is the same.

[0020] Step 3: After the saturated activated carbon enters the circulation pipe, due to the existence of the pulley mechanism, the rotation of the drive motor will simultaneously control the rotation of the spiral conveying rod to transport the activated carbon to the inner top of the circulation pipe. At this time, high-temperature steam enters the circulation pipe through the high-temperature steam inlet, which can desorb the impurities in the activated carbon adsorbed with impurities such as arsenic and selenium, so that the activated carbon regains its adsorption capacity, and then the steam is discharged from the steam exhaust pipe, while the regenerated activated carbon continues to move upward;

[0021] Step 4: Start the hot air blower to generate high-temperature gas, which is discharged from the induced draft pipe into the inside of the circulation pipe to dry the regenerated activated carbon. The wet gas is discharged from the steam exhaust pipe, and the dried activated carbon falls into the transfer bin through the feeding pipe for storage. After the activated carbon falls in, the cooling water source is connected to the water inlet to cool the activated carbon. The adsorption process is usually an exothermic process. According to Le Chatelier's principle, lowering the temperature can move the equilibrium toward the adsorption direction, and lower temperatures are conducive to adsorption.

[0022] Step 5: The water source for cooling the activated carbon has a relatively high temperature. At this time, it flows through the drain pipe to the inside of the spiral tube, and the saturated activated carbon can be preheated to save energy consumption;

[0023] Step 6: During the flow circulation of activated carbon, it experiences excessive wear or breakage, and the particles become smaller or a large amount of powder is produced, which will affect its filling and fluid mechanics properties in the adsorption device. At this time, open the discharge valve to discharge the activated carbon, and new activated carbon needs to be added for use.

[0024] The beneficial effects of the present invention are:

[0025] The present invention provides a purification treatment device and treatment process for acid production. By arranging a lower grid plate and an upper grid plate inside an adsorption tower, activated carbon is stored between the lower grid plate and the upper grid plate, and spiral blades are arranged between the lower grid plate and the upper grid plate, so that the contact area between gas and activated carbon can be increased, and the impurity removal effect can be improved. In addition, in combination with a discharge mechanism at the bottom of the lower grid plate, a feeding mechanism at the top of the upper grid plate, and a high-temperature steam regeneration mechanism between the discharge mechanism and the feeding mechanism, the activated carbon at the bottom of the adsorption tower can be continuously discharged during the gas impurity removal process, and then high-temperature steam regeneration can be performed, and activated carbon can be added from the top of the adsorption tower at the same time, forming a flow cycle of activated carbon, thereby ensuring the purification effect and purification rate.

[0026] Through the discharging mechanism composed of the lower partition, the lower turntable, the lower chute and the lower baffle, and the loading mechanism composed of the upper partition, the upper turntable, the loading chute and the upper baffle, and the driving motor and the shaft rod are used to drive the lower turntable and the upper turntable at the same time, it can ensure that the discharging and the feeding are carried out synchronously, and the internal capacity of the lower chute and the loading chute is the same, which can ensure the stability of the amount of activated carbon in the adsorption tower and ensure the gas impurity removal effect;

[0027] A high-temperature steam regeneration mechanism is composed of a circulation pipe, a discharge pipe, a discharge valve, a high-temperature steam inlet, a steam discharge pipe, a filter, a screw conveying rod, a feeding pipe, a transfer bin, a drying component, and a cooling component. A pulley mechanism is provided between the bottom end of the shaft and the screw conveying rod, which can automatically transport the discharged activated carbon upward and regenerate it with high-temperature steam, and then dry and cool the activated carbon to ensure the use effect of the activated carbon. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front view of a preferred embodiment of a purification treatment device and treatment process for acid production of the present invention;

[0029] Figure 2 It is a front cross-sectional view of a preferred embodiment of a purification treatment device and treatment process for acid production of the present invention;

[0030] Figure 3 It is a cross-sectional view of an adsorption tower in a preferred embodiment of a purification treatment device and treatment process for acid production of the present invention;

[0031] Figure 4It is a diagram of a discharging mechanism and a loading mechanism of a preferred embodiment of an acid-making purification treatment device and a treatment process of the present invention;

[0032] Figure 5 A cooling component diagram of a preferred embodiment of a purification treatment device and treatment process for acid production according to the present invention;

[0033] Figure 6 This is a structural diagram of the outer side of a feed pipe in a preferred embodiment of an acid-making purification treatment device and treatment process of the present invention;

[0034] Figure 7 It is a cross-sectional view of a circulation pipe in a preferred embodiment of a purification treatment device and treatment process for acid production of the present invention;

[0035] Figure 8 This is a diagram of a drying component in a preferred embodiment of an acid-making purification treatment device and treatment process of the present invention.

[0036] In the figure: 1. base; 2. adsorption tower; 3. air inlet pipe; 4. exhaust pipe; 5. lower grid plate; 6. upper grid plate; 7. drop hole; 8. feed hole; 9. positioning column; 10. spiral blade; 11. discharge mechanism; 12. feeding mechanism; 13. circulation pipe; 14. discharge pipe; 15. discharge valve; 16. high-temperature steam inlet; 17. steam discharge pipe; 18. filter screen; 19. spiral conveying rod; 20. feeding pipe; 21. transfer bin ; 22. Drying component; 23. Cooling component; 24. Driving motor; 25. Shaft; 26. Pulley mechanism; 27. Lower partition; 28. Lower turntable; 29. ​​Lower chute; 30. Lower baffle; 31. Upper partition; 32. Upper turntable; 33. Upper chute; 34. Upper baffle; 35. Water tank; 36. Heat conducting plate; 37. Water inlet; 38. Drain pipe; 39. Spiral pipe; 40. Hot air blower; 41. Air duct; 42. Exhaust hole. DETAILED DESCRIPTION

[0037] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0038] like Figure 1-Figure 8As shown, the present embodiment provides a purification treatment device for acid production, comprising a base 1, an adsorption tower 2 located at one end of the top of the base 1 and installed vertically, an air inlet pipe 3 opened at the bottom of the side of the adsorption tower 2, and an exhaust pipe 4 opened at the top of the adsorption tower 2, a lower grid plate 5 is horizontally installed at the inner bottom of the adsorption tower 2 and located above the air inlet pipe 3, an upper grid plate 6 is horizontally installed at the inner top of the adsorption tower 2, a positioning column 9 is vertically installed at the middle position between the lower grid plate 5 and the upper grid plate 6, a spiral blade 10 is installed between the outer side of the positioning column 9 and the inner wall of the adsorption tower 2, a drop hole 7 is opened on the side of the lower grid plate 5 away from the air inlet pipe 3, a discharge mechanism 11 for quantitatively discharging activated carbon is provided at the bottom of the drop hole 7, a feed hole 8 is provided on the upper grid plate 6 directly above the drop hole 7, a loading mechanism 12 for quantitatively adding activated carbon is provided on the top of the feed hole 8, and a high-temperature steam regeneration mechanism for activated carbon is provided between the discharge mechanism 11 and the loading mechanism 12.

[0039] The overall working principle is: the raw gas enters the interior of the adsorption tower 2, and impurities such as arsenic and selenium are adsorbed by the activated carbon. The activated carbon at the bottom of the adsorption tower 2 contacts the gas first, so it will be saturated first. The activated carbon at the bottom is discharged by the discharge mechanism 11, and the regenerated activated carbon is added by the feeding mechanism 12 to ensure that the amount of activated carbon in the adsorption tower 2 is fixed. The activated carbon discharged from the adsorption tower 2 enters the interior of the high-temperature steam regeneration mechanism for regeneration, and then is used by the feeding mechanism 12. The activated carbon is in a state of flow circulation, ensuring the purification effect during use.

[0040] In this embodiment, the discharge mechanism 11 includes a lower partition 27, a lower turntable 28, a material chute 29 and a lower baffle 30. The lower partition 27 is horizontally fixed below the lower grid plate 5, and the two ends of the lower partition 27 are respectively located inside and outside the adsorption tower 2. The lower turntable 28 is rotatably installed on the top of the lower partition 27. The lower turntable 28 is symmetrically provided with a material chute 29 that cooperates with the material drop hole 7. The outer side of the adsorption tower 2 is horizontally fixed with a lower baffle 30 that fits with the top of the lower turntable 28.

[0041] Local working principle: During discharge, when the lower feeding chute 29 is aligned with the discharge hole 7, the activated carbon at the bottom of the adsorption tower 2 will quantitatively enter the lower feeding chute 29, and then by controlling the rotation of the lower turntable 28, the activated carbon in the lower feeding chute 29 will be transferred out of the adsorption tower 2 and fall into the high-temperature steam regeneration mechanism for regeneration.

[0042] In this embodiment, the feeding mechanism 12 includes an upper partition 31, an upper turntable 32, a feeding trough 33 and an upper baffle 34. The upper partition 31 is horizontally fixed at the top of the outer side of the adsorption tower 2. The upper turntable 32 is rotatably installed on the top of the upper partition 31. The two ends of the upper turntable 32 are respectively located inside and outside the adsorption tower 2. The upper turntable 32 is symmetrically provided with a feeding trough 33 that cooperates with the feed hole 8. The top of the outer side of the adsorption tower 2 is horizontally installed with an upper baffle 34 that fits the surface of the feeding trough 33. The volume of the feeding trough 33 is the same as that of the lower feeding trough 29.

[0043] Local working principle: while the activated carbon at the bottom of the adsorption tower 2 is discharged, the upper turntable 32 rotates at the same time, and the regenerated activated carbon is injected from the outside of the adsorption tower 2 into the inside of the loading trough 33, and then the upper turntable 32 rotates to transfer the regenerated activated carbon to the inside of the adsorption tower 2. When the loading trough 33 is aligned with the feed hole 8, the activated carbon is automatically added, and the feeding and discharging of the activated carbon are carried out simultaneously to ensure that the amount of activated carbon is fixed.

[0044] In this embodiment, a driving motor 24 is installed on the top of the base 1, and a shaft rod 25 is installed on the output end of the driving motor 24. The shaft rod 25 passes through the lower partition 27, the lower turntable 28, the lower baffle 30, and the upper partition 31, and the shaft rod 25 is fixedly connected to the lower turntable 28 and the upper turntable 32.

[0045] Partial working principle: By starting the driving motor 24, the shaft 25 is driven to rotate, and the shaft 25 can simultaneously control the rotation of the lower turntable 28 and the upper turntable 32 to synchronously load and discharge materials.

[0046] In this embodiment, the high-temperature steam regeneration mechanism includes a circulation pipe 13, a discharge pipe 14, a discharge valve 15, a high-temperature steam inlet 16, a steam discharge pipe 17, a filter screen 18, a spiral conveying rod 19, a feed pipe 20, a transfer bin 21, a drying component 22 and a cooling component 23. The circulation pipe 13 is vertically installed on the top of the base 1, and the discharge pipe 14 is installed between the bottom end of the circulation pipe 13 and the bottom of the lower partition 27. The top end of the discharge pipe 14 is connected to the discharge trough 29, and the bottom of the discharge pipe 14 is provided with a discharge valve 1 5. A spiral conveying rod 19 is rotatably installed at the inner bottom end of the circulation pipe 13, a high-temperature steam inlet 16 is provided at the bottom of the outer side of the circulation pipe 13, a steam exhaust pipe 17 is provided at the top of the outer side of the circulation pipe 13, a filter screen 18 is provided inside the steam exhaust pipe 17, a transfer bin 21 is fixed on the top of the upper baffle 34 and communicated with the feeding trough 33, a feeding pipe 20 is provided between the top of the circulation pipe 13 and the transfer bin 21, a drying component 22 is installed on the top of the circulation pipe 13, and a cooling component 23 is provided on the outer side of the transfer bin 21.

[0047] Local working principle: the activated carbon discharged from the discharge chute 29 enters the interior of the discharge pipe 14, slides downward along the discharge pipe 14, and enters the interior of the circulation pipe 13. By controlling the rotation of the spiral conveying rod 19, the activated carbon is transported to the top of the circulation pipe 13, and at the same time, high-temperature steam is introduced into the interior of the circulation pipe 13. The impurities in the activated carbon that adsorbs impurities such as arsenic and selenium are desorbed by high-temperature steam, so that the activated carbon regains its adsorption capacity. The regenerated activated carbon is continuously transported upward, and after being dried at the top of the circulation pipe 13, it falls into the interior of the transfer bin 21 for storage. During the storage process, the cooling component 23 is used to perform a cooling operation to cool the activated carbon to below room temperature. The activated carbon stored in the transfer bin 21 is added to the interior of the loading chute 33 when loading.

[0048] In this embodiment, the top end of the spiral conveying rod 19 is lower than the horizontal plane of the top of the steam exhaust pipe 17, the bottom end of the spiral conveying rod 19 extends to the bottom of the circulation pipe 13, and a pulley mechanism 26 is provided between the bottom end of the spiral conveying rod 19 and the shaft 25.

[0049] Partial working principle: through the transmission control of the pulley 26, the use of the driving motor 24 is used to simultaneously perform the addition, discharge and regeneration of activated carbon, which is easy to control and more energy-saving.

[0050] In this embodiment, the drying component 22 includes a hot air blower 40, an air duct 41 and exhaust holes 42. The hot air blower 40 is installed at the top of the circulation pipe 13. The air duct 41 is vertically fixed to the inner top of the circulation pipe 13. The output end of the hot air blower 40 is connected to the inside of the air duct 41, and the exhaust holes 42 are evenly opened on the outside of the air duct 41.

[0051] Local working principle: the activated carbon after regeneration is in a wet state. At this time, the hot air blower 40 is turned on to pass dry hot air into the interior of the circulation pipe 13, and the opening of the exhaust hole 42 on the outside of the air duct 41 increases the contact area with the activated carbon, speeding up the drying of the activated carbon, and the steam generated by the drying will be discharged from the steam exhaust pipe 17.

[0052] In this embodiment, the cooling component 23 includes a water tank 35, a heat conductive sheet 36, a water inlet 37 and a drain pipe 38. The water tank 35 is fixed to the outside of the transfer bin 21. The heat conductive sheets 36 are evenly arranged inside the water tank 35, and one end of the heat conductive sheets 36 extends to the inside of the transfer bin 21. The top of the outside of the water tank 35 is provided with a water inlet 37, and the bottom of the outside of the water tank 35 is provided with a drain pipe 38.

[0053] Local working principle: After drying, the activated carbon falls into the transfer bin 21 for storage. At this time, the external cooling water source is injected into the water tank 35 for water cooling to take away the heat on the surface of the activated carbon to ensure that the activated carbon is below room temperature and can be better adsorbed.

[0054] In this embodiment, a spiral tube 39 is wound around the outer side of the feed tube 14 , a drain port is provided at the bottom end of the spiral tube 39 , and the top end of the spiral tube 39 is connected to the drain pipe 38 .

[0055] Local working principle: the water source after cooling has a certain amount of heat, and the discharged water flowing through the spiral tube 39 can transfer the heat to the activated carbon that will enter the circulation tube 13 for preheating, saving the energy consumption of the activated carbon during heating.

[0056] like Figure 1-Figure 8 As shown, this embodiment provides a purification process for acid production as follows:

[0057] Step 1: The raw gas after dust removal, washing and drying is injected into the adsorption tower 2 from the inside of the air inlet pipe 3. The raw gas flows from bottom to top through the activated carbon and is guided by the spiral blade 10 to increase the residence time inside the activated carbon to adsorb impurities such as arsenic and selenium.

[0058] Step 2: The activated carbon at the bottom of the adsorption tower 2 will be saturated first. Therefore, during the activated carbon adsorption process, the lower turntable 28 is slowly started by the driving motor 24. After the feed trough 29 on the lower turntable 28 is aligned with the feed hole 7, the activated carbon at the bottom of the adsorption tower 2 that has been saturated may flow into the feed trough 29. With the continuous rotation of the lower turntable 28, the activated carbon is transferred to the outside of the adsorption tower 2 and flows into the inside of the circulation pipe 13 through the feed pipe 14. At the same time, when the driving motor 24 is started, the upper turntable 32 is driven to rotate, and the activated carbon in the transfer bin 21 is transferred to the inside of the adsorption tower 2, and the discharged activated carbon is supplemented to ensure that the total amount of activated carbon is the same;

[0059] Step 3: After the saturated activated carbon enters the circulation pipe 13, due to the existence of the pulley mechanism 26, the rotation of the drive motor 24 will simultaneously control the rotation of the screw conveying rod 19 to convey the activated carbon to the inner top of the circulation pipe 13. At this time, high-temperature steam enters the circulation pipe 13 through the high-temperature steam inlet 16, and can desorb the impurities in the activated carbon adsorbed with impurities such as arsenic and selenium, so that the activated carbon regains its adsorption capacity, and then the steam is discharged from the steam discharge pipe 17, and the regenerated activated carbon continues to move upward;

[0060] Step 4: Start the hot air blower 40 to generate high-temperature gas, which is discharged from the induced draft pipe 41 into the inside of the circulation pipe 13 to dry the regenerated activated carbon. The wet gas is discharged from the steam discharge pipe 17, and the dried activated carbon falls into the transfer bin 21 through the feeding pipe 20 for storage. After the activated carbon falls in, the cooling water source is connected to the water inlet 37 to cool the activated carbon. The adsorption process is usually an exothermic process. According to Le Chatelier's principle, lowering the temperature can move the equilibrium toward the adsorption direction, and lower temperatures are conducive to adsorption.

[0061] Step 5: The water source for cooling the activated carbon has a relatively high temperature, and at this time flows through the drain pipe 38 to the inside of the spiral tube 39, and can preheat the saturated activated carbon, thereby saving energy consumption;

[0062] Step 6: During the flow circulation of the activated carbon, it undergoes excessive wear or breakage, and the particles become smaller or a large amount of powder is produced, which will affect its filling and fluid mechanics properties in the adsorption device. At this time, open the discharge valve 15 to discharge the activated carbon, and new activated carbon needs to be added for use.

[0063] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. A purification treatment device and treatment process for acid production, comprising a base (1), an adsorption tower (2) located at one end of the top of the base (1) and installed vertically, an air inlet pipe (3) opened at the bottom of the side of the adsorption tower (2), and an exhaust pipe (4) opened at the top of the adsorption tower (2), characterized in that: A lower grid plate (5) is horizontally installed at the inner bottom of the adsorption tower (2) and located above the air inlet pipe (3); an upper grid plate (6) is horizontally installed at the inner top of the adsorption tower (2); a positioning column (9) is vertically installed at the middle position between the lower grid plate (5) and the upper grid plate (6); a spiral blade (10) is installed between the outer side of the positioning column (9) and the inner wall of the adsorption tower (2); a drop hole (7) is opened on the side of the lower grid plate (5) away from the air inlet pipe (3); a discharge mechanism (11) for quantitatively discharging activated carbon is provided at the bottom of the drop hole (7); a feed hole (8) is provided on the upper grid plate (6) directly above the drop hole (7); a loading mechanism (12) for quantitatively adding activated carbon is provided at the top of the feed hole (8); and a high-temperature steam regeneration mechanism for the activated carbon is provided between the discharge mechanism (11) and the loading mechanism (12).

2. The purification treatment device and treatment process for acid production according to claim 1, characterized in that: The discharge mechanism (11) comprises a lower partition (27), a lower turntable (28), a material discharge chute (29) and a lower baffle (30). The lower partition (27) is horizontally fixed below the lower grid plate (5), and the two ends of the lower partition (27) are respectively located inside and outside the adsorption tower (2). The lower turntable (28) is rotatably mounted on the top of the lower partition (27). The lower turntable (28) is symmetrically provided with a material discharge chute (29) matched with the material discharge hole (7). The outer side of the adsorption tower (2) is horizontally fixed with a lower baffle (30) that is in contact with the top of the lower turntable (28).

3. The purification treatment device and treatment process for acid production according to claim 2, characterized in that: The feeding mechanism (12) comprises an upper partition (31), an upper turntable (32), a feeding trough (33) and an upper baffle (34); the upper partition (31) is horizontally fixed to the top of the outer side of the adsorption tower (2); the upper turntable (32) is rotatably mounted on the top of the upper partition (31); the two ends of the upper turntable (32) are respectively located inside and outside the adsorption tower (2); the upper turntable (32) is symmetrically provided with a feeding trough (33) matched with the feeding hole (8); the upper baffle (34) is horizontally mounted on the top of the outer side of the adsorption tower (2) and is in contact with the surface of the feeding trough (33); the volume of the feeding trough (33) is the same as that of the lower feeding trough (29).

4. The purification treatment device and treatment process for acid production according to claim 3, characterized in that: A driving motor (24) is installed on the top of the base (1), and a shaft (25) is installed on the output end of the driving motor (24). The shaft (25) passes through a lower partition (27), a lower turntable (28), a lower baffle (30), and an upper partition (31), and the shaft (25) is fixedly connected to the lower turntable (28) and the upper turntable (32).

5. The acid purification device and treatment process according to claim 4, characterized in that: The high-temperature steam regeneration mechanism comprises a circulation pipe (13), a discharge pipe (14), a discharge valve (15), a high-temperature steam inlet (16), a steam discharge pipe (17), a filter screen (18), a spiral conveying rod (19), a feed pipe (20), a transfer bin (21), a drying component (22) and a cooling component (23). The circulation pipe (13) is vertically installed on the top of the base (1). The discharge pipe (14) is installed between the bottom end of the circulation pipe (13) and the bottom of the lower partition (27). The top end of the discharge pipe (14) is connected to the discharge trough (29). The bottom of the discharge pipe (14) is provided with a discharge valve (15). A spiral conveying rod (19) is rotatably mounted on the inner bottom end of the circulation pipe (13), a high-temperature steam inlet (16) is provided at the bottom of the outer side of the circulation pipe (13), a steam exhaust pipe (17) is provided at the top of the outer side of the circulation pipe (13), a filter screen (18) is provided inside the steam exhaust pipe (17), a transfer bin (21) is fixed on the top of the upper baffle (34) and is connected to the feeding trough (33), a feeding pipe (20) is provided between the top of the circulation pipe (13) and the transfer bin (21), a drying component (22) is installed on the top of the circulation pipe (13), and a cooling component (23) is provided on the outer side of the transfer bin (21).

6. The purification treatment device and treatment process for acid production according to claim 5, characterized in that: The top end of the spiral conveying rod (19) is lower than the horizontal plane of the top of the steam discharge pipe (17), the bottom end of the spiral conveying rod (19) extends to the bottom of the circulation pipe (13), and a pulley mechanism (26) is provided between the bottom end of the spiral conveying rod (19) and the shaft rod (25).

7. A purification treatment device and treatment process for acid production according to claim 5 or 6, characterized in that: The drying component (22) comprises a hot air blower (40), an air induced draft pipe (41) and exhaust holes (42); the hot air blower (40) is installed at the top end of the circulation pipe (13); the air induced draft pipe (41) is vertically fixed to the inner top end of the circulation pipe (13); the output end of the hot air blower (40) is connected to the inside of the air induced draft pipe (41); and the exhaust holes (42) are evenly arranged on the outer side of the air induced draft pipe (41).

8. The purification treatment device and treatment process for acid production according to claim 7, characterized in that: The cooling component (23) comprises a water tank (35), a heat conducting sheet (36), a water inlet (37) and a drain pipe (38). The water tank (35) is fixed on the outside of the transfer bin (21). The inside of the water tank (35) is evenly provided with heat conducting sheets (36), and one end of the heat conducting sheets (36) extends to the inside of the transfer bin (21). The top of the outside of the water tank (35) is provided with a water inlet (37), and the bottom of the outside of the water tank (35) is provided with a drain pipe (38).

9. The purification treatment device and treatment process for acid production according to claim 8, characterized in that: A spiral tube (39) is wound around the outer side of the feed tube (14), a drain port is arranged at the bottom end of the spiral tube (39), and the top end of the spiral tube (39) is connected to the drain pipe (38).

10. A purification treatment device for acid production, based on the purification treatment process for acid production according to claim 9, characterized in that: The steps include: Step 1: The raw gas after dust removal, washing and drying is injected into the adsorption tower (2) from the inside of the air inlet pipe (3), and the raw gas flows from bottom to top through the activated carbon and is guided by the spiral blade (10) to increase the residence time inside the activated carbon and adsorb impurities such as arsenic and selenium; Step 2: The activated carbon at the bottom of the adsorption tower (2) will be saturated first. Therefore, during the activated carbon adsorption process, the lower turntable (28) is slowly started by the driving motor (24). After the feed trough (29) on the lower turntable (28) is aligned with the feed hole (7), the activated carbon at the bottom of the adsorption tower (2) that is already saturated may flow into the feed trough (29). As the lower turntable (28) continues to rotate, the activated carbon is transferred to the outside of the adsorption tower (2) and flows into the inside of the circulation pipe (13) through the feed pipe (14). At the same time, when the driving motor (24) is started, the upper turntable (32) is driven to rotate, and the activated carbon in the transfer bin (21) is transferred to the inside of the adsorption tower (2), and the discharged activated carbon is replenished to ensure that the total amount of activated carbon is the same; Step 3: After the saturated activated carbon enters the circulation pipe (13), due to the presence of the pulley mechanism (26), the rotation of the drive motor (24) will simultaneously control the rotation of the screw conveying rod (19), and the activated carbon will be transported to the inner top of the circulation pipe (13). At this time, high-temperature steam enters the circulation pipe (13) through the high-temperature steam inlet (16), and the impurities in the activated carbon adsorbed with impurities such as arsenic and selenium can be desorbed, so that the activated carbon regains its adsorption capacity, and then the steam is discharged from the steam discharge pipe (17), and the regenerated activated carbon continues to move upward; Step 4: Start the hot air blower (40) to generate high-temperature gas, which is discharged from the induced draft pipe (41) into the inside of the circulation pipe (13) to dry the regenerated activated carbon. The moist gas is discharged from the steam discharge pipe (17), and the dried activated carbon falls into the interior of the transfer bin (21) through the feeding pipe (20) for storage. After the activated carbon falls into the transfer bin, the cooling water source is connected to the water inlet (37) to cool the activated carbon. The adsorption process is usually an exothermic process. According to Le Chatelier's principle, lowering the temperature can move the equilibrium toward the adsorption direction, and lower temperatures are conducive to adsorption. Step 5: The water source for cooling the activated carbon has a relatively high temperature, and at this time flows through the drain pipe (38) to the inside of the spiral tube (39), and can preheat the saturated activated carbon, thereby saving energy consumption; Step 6: During the circulation of activated carbon, it undergoes excessive wear or breakage, and the particles become smaller or a large amount of powder is produced, which will affect its filling and fluid mechanics properties in the adsorption device. At this time, open the discharge valve (15) to discharge the activated carbon, and new activated carbon needs to be added for use.

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