Device for curing, impurity removal and purification of magnesium oxide powder for desulfurization

Abstract

The utility model discloses a magnesium oxide powder curing, impurity removal and purification device for desulfurization, which belongs to the technical field of magnesium desulfurization agent production equipment and comprises a curing tank body, a stirring mechanism is arranged on the back of the curing tank body, and a multi-stage electric push rod is fixedly mounted at the bottom of the curing tank body. According to the device disclosed by the utility model, magnesium oxide solution is cured and settled in the curing tank body, and the layered solution is respectively adjusted to be flush with the input end of the first slurry pump by utilizing the matching between the multi-stage electric push rod and the piston push plate; upper-layer slurry, middle-layer slurry and lower-layer waste liquid are separated and discharged through a first slurry pump, a four-way electric control valve, a first guide pipe, a third guide pipe and a second guide pipe respectively, the middle-layer slurry in an inner cavity of the temporary slurry storage box is pumped into the curing tank body through a second slurry pump and a slurry return pipe to be cured and purified again, and good practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of magnesium-based desulfurizing agent production equipment, and more specifically to a magnesium oxide powder aging, impurity removal and purification device for desulfurization. Background Art

[0002] Magnesium oxide desulfurization technology is a desulfurization process second only to calcium method in maturity. It uses magnesium oxide powder matured into magnesium hydroxide as a desulfurizer. When in use, the boiler flue gas is sent into the pre-cooling section of the absorption tower by the induced draft fan, and enters the absorption tower after cooling to a suitable temperature, and reacts with the magnesium oxide absorption slurry flowing in the reverse direction to remove the sulfur in the flue gas. The biggest advantage of magnesium desulfurization over calcium desulfurization is that the system will not have equipment scaling and clogging problems, which can ensure the safe and effective operation of the entire desulfurization system. However, in the traditional process, there are more impurities in the desulfurizer of magnesium desulfurization, which affects the desulfurization effect and has a great impact on the formation and quality of the by-product magnesium sulfite crystals.

[0003] After searching, the invention patent with the announcement number CN101659432A discloses a method for aging, removing impurities and purifying magnesium oxide powder for desulfurization, including magnesium oxide powder aging, sedimentation and separation, which is characterized in that: light-burned magnesium oxide powder is transported to a aging tank, water is injected to adjust the slurry concentration, and after stirring and aging for 6 hours, a slurry with magnesium hydroxide as the main body is formed, which is settled for 4-6 hours and divided into three layers. The upper suspension is pumped into a desulfurizer slurry tank, and the lower insoluble matter is discarded for treatment. The middle layer is again water-added for aging, sedimentation and separation. The lower insoluble matter after separation is discharged and discarded, and the upper layer enters the desulfurizer slurry tank for standby use, and the final desulfurizer slurry pH is 10-12; the patent realizes the impurity removal and purification technology of magnesium oxide desulfurizer, which is beneficial to the high efficiency of desulfurization efficiency in the absorption tower and the stability of magnesium sulfite crystallization, ensures the crystal formation, effective dehydration and high-quality output of by-products, significantly reduces the impurity content in the desulfurization slurry, and provides a good environment for the subsequent treatment of by-products. It is suitable for the removal of impurities and purification of magnesium-based desulfurizers.

[0004] However, the above patent still has the following shortcomings: after the magnesium oxide powder is matured in the maturation tank, the solution needs to be introduced into the separation tank for separation, and the middle layer suspension needs to be put into the maturation tank again for processing, which is a cumbersome operation. For this reason, we propose a magnesium oxide powder maturation, impurity removal and purification device for desulfurization. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide a magnesium oxide powder aging, impurity removal and purification device for desulfurization.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A magnesium oxide powder aging, impurity removal and purification device for desulfurization, comprising an aging tank body, a stirring mechanism is arranged on the back of the aging tank body, a multi-stage electric push rod is fixedly installed on the bottom of the aging tank body, the output end of the multi-stage electric push rod extends to the inner cavity of the aging tank body and is fixedly connected to a piston push plate, a first slurry pump is fixedly installed on the side of the aging tank body, the input end of the first slurry pump extends to the inner cavity of the aging tank body, the output end of the first slurry pump is fixedly connected to a four-way electric control valve, the first output end of the four-way electric control valve is fixedly connected to a first conduit, and the The end of the first conduit is fixedly connected to a desulfurizer slurry tank, the second output end of the four-way electric control valve is fixedly connected to a second conduit, the end of the second conduit is fixedly connected to a waste slurry tank, the third output end of the four-way electric control valve is fixedly connected to a third conduit, the end of the third conduit is fixedly connected to a temporary slurry storage box, a second slurry pump is fixedly installed on the side of the temporary slurry storage box, the input end of the second slurry pump extends to the inner cavity of the temporary slurry storage box, the output end of the second slurry pump is fixedly connected to a slurry return pipe, and the end of the slurry return pipe extends to the inner cavity of the maturation tank.

[0008] As a preferred scheme of the utility model, the stirring mechanism includes two support seats fixedly connected to the back of the ripening tank body, a reciprocating screw rod is rotatably connected between the two support seats, a first motor is fixedly installed on the bottom surface of one of the support seats, the output shaft of the first motor is connected to the bottom end of the reciprocating screw rod, a lifting seat is threadedly sleeved on the outer side of the reciprocating screw rod, two lifting columns are fixedly connected to the top surface of the lifting seat, the top ends of the two lifting columns are fixedly connected to a mounting seat, a second motor is fixedly installed on the top surface of the mounting seat, the output shaft of the second motor is fixedly connected to a rotating column, the bottom end of the rotating column is movably sleeved to the inner cavity of the ripening tank body and fixedly connected to a plurality of stirring plates, and a second heating plate is arranged on the side of the stirring plate.

[0009] As a preferred solution of the utility model, a first slurry discharge valve is fixedly installed on the side of the desulfurizer slurry box, and a second slurry discharge valve is fixedly installed on the side of the waste slurry box.

[0010] As a preferred solution of the utility model, a first heating plate is arranged on the top surface of the piston push plate, and the side surface of the piston push plate is in contact with the inner wall of the ripening tank body.

[0011] As a preferred solution of the utility model, a perspective plate is fixedly sleeved on the front of the ripening tank body, and a control panel is fixedly installed on the side of the ripening tank body.

[0012] As a preferred solution of the utility model, a material injection pipe is fixedly sleeved on the top surface of the maturation tank body, and a water injection pipe is fixedly sleeved on the top surface of the maturation tank body.

[0013] As a preferred solution of the utility model, the inner side surface of the lifting seat is in contact with the outer side surface of the ripening tank body.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] In the utility model, the magnesium oxide solution is matured and settled in the maturation tank body, the cooperation between the multi-stage electric push rod and the piston push plate is used to adjust the low surface of the layered solution to be flush with the input end of the first slurry pump, the first slurry pump, the four-way electric control valve, the first conduit, the third conduit and the second conduit are used to separate and discharge the upper slurry, the middle slurry and the lower waste liquid respectively, and the middle slurry in the inner cavity of the temporary slurry storage box is pumped into the maturation tank body through the second slurry pump and the slurry return pipe for re-maturation and purification, and the utility model has good practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a cross-sectional schematic diagram of the ripening tank body of the utility model;

[0018] Figure 3 It is a structural schematic diagram of the aging tank of the utility model;

[0019] Figure 4 It is a structural schematic diagram of a temporary slurry storage box of the utility model.

[0020] Description of the numbers in the figure:

[0021] 1. Aging tank; 2. Stirring mechanism; 3. Multi-stage electric push rod; 4. Piston push plate; 5. First heating plate; 6. First slurry pump; 7. Desulfurizer slurry tank; 8. Waste slurry tank; 9. Temporary slurry storage tank; 10. Four-way electric control valve; 11. First conduit; 12. Second conduit; 13. Third conduit; 14. Second slurry pump; 15. Return slurry pipe; 16. First row of slurry valves; 17. Second row of slurry valves; 18. Injection pipe; 19. Water injection pipe; 20. Support seat; 21. Reciprocating screw rod; 22. First motor; 23. Lifting seat; 24. Lifting column; 25. Mounting seat; 26. Second motor; 27. Rotating column; 28. Stirring plate; 29. ​​Second heating plate; 30. Control panel; 31. Transparent plate. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0025] Example:

[0026] See also Figure 1-4 A magnesium oxide powder aging, impurity removal and purification device for desulfurization comprises an aging tank body 1, a stirring mechanism 2 is arranged on the back of the aging tank body 1, a multi-stage electric push rod 3 is fixedly installed on the bottom of the aging tank body 1, the output end of the multi-stage electric push rod 3 extends to the inner cavity of the aging tank body 1 and is fixedly connected to a piston push plate 4, a first slurry pump 6 is fixedly installed on the side of the aging tank body 1, the input end of the first slurry pump 6 extends to the inner cavity of the aging tank body 1, the output end of the first slurry pump 6 is fixedly connected to a four-way electric control valve 10, the first output end of the four-way electric control valve 10 is fixedly connected to a first conduit 11, and the first conduit 1 1 is fixedly connected to a desulfurizer slurry tank 7, a second output end of the four-way electric control valve 10 is fixedly connected to a second conduit 12, an end of the second conduit 12 is fixedly connected to a waste slurry tank 8, a third output end of the four-way electric control valve 10 is fixedly connected to a third conduit 13, an end of the third conduit 13 is fixedly connected to a temporary slurry storage box 9, a second slurry pump 14 is fixedly installed on the side of the temporary slurry storage box 9, an input end of the second slurry pump 14 extends to the inner cavity of the temporary slurry storage box 9, an output end of the second slurry pump 14 is fixedly connected to a slurry return pipe 15, and an end of the slurry return pipe 15 extends to the inner cavity of the maturation tank body 1.

[0027] For details, please refer to Figures 1 to 3The stirring mechanism 2 includes two support seats 20 fixedly connected to the back side of the ripening tank body 1, a reciprocating screw rod 21 is rotatably connected between the two support seats 20, a first motor 22 is fixedly installed on the bottom surface of one support seat 20, the output shaft of the first motor 22 is connected to the bottom end of the reciprocating screw rod 21, a lifting seat 23 is threadedly sleeved on the outer side of the reciprocating screw rod 21, two lifting columns 24 are fixedly connected to the top surface of the lifting seat 23, a mounting seat 25 is fixedly connected to the top end of the two lifting columns 24, a second motor 26 is fixedly installed on the top surface of the mounting seat 25, the output shaft of the second motor 26 is fixedly connected to a rotating column 27, the bottom end of the rotating column 27 is movably sleeved to the inner cavity of the ripening tank body 1 and fixedly connected to a plurality of stirring plates 28, and a second heating plate 29 is arranged on the side of the stirring plate 28.

[0028] In this embodiment, the second heating plate 29 is used to heat the solution in the inner cavity of the aging tank 1 , and the stirring plate 28 is used to stir the solution.

[0029] For details, please refer to Figure 1 A first slurry discharge valve 16 is fixedly installed on the side of the desulfurizer slurry box 7, and a second slurry discharge valve 17 is fixedly installed on the side of the waste slurry box 8.

[0030] In this embodiment, the upper suspension in the desulfurizer slurry box 7 is discharged through the first slurry discharge valve 16, and the insoluble matter in the waste slurry box 8 is discharged by the second slurry discharge valve 17.

[0031] For details, please refer to Figure 2 A first heating plate 5 is disposed on the top surface of the piston push plate 4 , and the side surface of the piston push plate 4 is in contact with the inner wall of the ripening tank body 1 .

[0032] In this embodiment, the sealing of the upper and lower parts of the inner cavity of the ripening tank body 1 is ensured by the fit between the side of the piston push plate 4 and the inner wall of the ripening tank body 1. In addition, a vent hole needs to be provided at the bottom of the inner cavity of the ripening tank body 1 to ensure that the piston push plate 4 can move smoothly and avoid negative pressure in the lower part of the inner cavity of the ripening tank body 1. In addition, the first heating plate 5 is used to heat the magnesium oxide solution in the inner cavity of the ripening tank body 1.

[0033] For details, please refer to Figure 1 A perspective plate 31 is fixedly sleeved on the front of the ripening tank body 1 , and a control panel 30 is fixedly installed on the side of the ripening tank body 1 .

[0034] In this embodiment, the height of the liquid in the ripening tank 1 is controlled through the perspective plate 31 , and the device is controlled through the control panel 30 .

[0035] For details, please refer to Figure 3 A material injection pipe 18 is fixedly sleeved on the top surface of the ripening tank body 1 , and a water injection pipe 19 is fixedly sleeved on the top surface of the ripening tank body 1 .

[0036] In this embodiment, magnesium oxide powder is put into the aging tank body 1 through the injection pipe 18, and water is added into the aging tank body 1 through the water injection pipe 19.

[0037] For details, please refer to Figure 3 The inner side surface of the lifting seat 23 is in contact with the outer side surface of the ripening tank body 1.

[0038] In this embodiment, the outer side of the ripening tank body 1 is used to limit the lifting seat 23 , so that the lifting seat 23 can only move along the axial direction of the reciprocating screw rod 21 .

[0039] Working principle: When in use, first start the multi-stage electric push rod 3 to drive the piston push plate 4 to move to the bottom of the inner cavity of the aging tank body 1, and fill the magnesium oxide powder into the inner cavity of the aging tank body 1 from the injection pipe 18, and gradually add water to the inner cavity of the aging tank body 1 from the water injection pipe 19, so as to adjust the slurry concentration in the aging tank body 1, and then start the second motor 26 to drive the rotating column 27 and the stirring plate 28 to rotate, and at the same time start the first motor 22 to drive the reciprocating screw 21 to rotate, and through the cooperation between the reciprocating screw 21 and the lifting seat 23, the lifting seat 23, the lifting column 24, the mounting seat 25, the rotating column 27 and The stirring plate 28 moves up and down, and the stirring plate 28 is used to stir the magnesium oxide solution in the aging tank 1. At the same time, the second heating plate 29 and the first heating plate 5 are energized to generate heat, so that the magnesium oxide solution is stirred and matured for six hours to become a slurry with magnesium hydroxide as the main body. Then the stirring plate 28 is moved to the top of the inner cavity of the aging tank 1, and the magnesium hydroxide slurry in the aging tank 1 is allowed to settle for four to six hours. The slurry is divided into three layers. At this time, the multi-stage electric push rod 3 is started to drive the piston push plate 4 to move upward, and the piston push plate 4 is used to push the settled slurry upward, so that the lower surface of the upper slurry after stratification moves to the first slurry pumping The input end of the pump 6 is flush with each other, the four-way electric control valve 10 is controlled to make the output end of the first slurry pump 6 connected to the first conduit 11, and the first slurry pump 6 is started to introduce the upper slurry in the inner cavity of the maturation tank body 1 from the four-way electric control valve 10 and the first conduit 11 into the desulfurizer slurry tank 7 for storage. At this time, the multi-stage electric push rod 3 is started again to drive the piston push plate 4 to move up, so that the lower surface of the middle slurry is flush with the input end of the first slurry pump 6, the four-way electric control valve 10 is controlled to make the output end of the first slurry pump 6 connected to the third conduit 13, and the first slurry pump 6 is started to introduce the middle slurry in the inner cavity of the maturation tank body 1 from the four-way electric control valve 10 and the first conduit 11 into the desulfurizer slurry tank 7 for storage. 10 and the third conduit 13 are introduced into the temporary slurry storage box 9, at this time, the multi-stage electric push rod 3 is started again to drive the piston push plate 4 to move upward, so that the lower surface of the lower waste liquid is flush with the input end of the first slurry pump 6, and the four-way electric control valve 10 is controlled to make the output end of the first slurry pump 6 and the second conduit 12 connected, and the first slurry pump 6 is started to introduce the middle layer slurry in the inner cavity of the maturation tank body 1 from the four-way electric control valve 10 and the second conduit 12 into the waste slurry box 8, and finally the second slurry pump 14 is started to draw the middle layer slurry in the temporary slurry storage box 9 from the return slurry pipe 15 back to the maturation tank body 1, and it is matured, impurity-removed and purified again.

[0040] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A magnesium oxide powder for desulfurization aging, impurity removal and purification device, comprising an aging tank (1), characterized in that: The back of the maturation tank body (1) is provided with a stirring mechanism (2); a multi-stage electric push rod (3) is fixedly installed at the bottom of the maturation tank body (1); the output end of the multi-stage electric push rod (3) extends to the inner cavity of the maturation tank body (1) and is fixedly connected to a piston push plate (4); a first slurry pump (6) is fixedly installed on the side of the maturation tank body (1); the input end of the first slurry pump (6) extends to the inner cavity of the maturation tank body (1); the output end of the first slurry pump (6) is fixedly connected to a four-way electric control valve (10); the first output end of the four-way electric control valve (10) is fixedly connected to a first conduit (11); the end of the first conduit (11) is fixedly connected to a desulfurization agent slurry tank (7), the second output end of the four-way electric control valve (10) is fixedly connected to a second conduit (12), the end of the second conduit (12) is fixedly connected to a waste pulp box (8), the third output end of the four-way electric control valve (10) is fixedly connected to a third conduit (13), the end of the third conduit (13) is fixedly connected to a temporary pulp storage box (9), a second pulp pump (14) is fixedly installed on the side of the temporary pulp storage box (9), the input end of the second pulp pump (14) extends to the inner cavity of the temporary pulp storage box (9), the output end of the second pulp pump (14) is fixedly connected to a pulp return pipe (15), the end of the pulp return pipe (15) extends to the inner cavity of the maturation tank (1).

2. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 1, characterized in that: The stirring mechanism (2) comprises two support seats (20) fixedly connected to the back side of the ripening tank body (1), a reciprocating screw rod (21) being rotatably connected between the two support seats (20), a first motor (22) being fixedly mounted on the bottom surface of one of the support seats (20), an output shaft of the first motor (22) being connected to the bottom end of the reciprocating screw rod (21), a lifting seat (23) being threadedly sleeved on the outer side of the reciprocating screw rod (21), two lifting columns (24) being fixedly connected to the top surface of the lifting seat (23), a mounting seat (25) being fixedly connected to the top ends of the two lifting columns (24), a second motor (26) being fixedly mounted on the top surface of the mounting seat (25), an output shaft of the second motor (26) being fixedly connected to a rotating column (27), a bottom end of the rotating column (27) being movably sleeved to the inner cavity of the ripening tank body (1) and fixedly connected to a plurality of stirring plates (28), a second heating plate (29) being arranged on the side of the stirring plate (28).

3. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 1, characterized in that: A first slurry discharge valve (16) is fixedly installed on the side of the desulfurizing agent slurry box (7), and a second slurry discharge valve (17) is fixedly installed on the side of the waste slurry box (8).

4. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 1, characterized in that: The top surface of the piston push plate (4) is provided with a first heating plate (5), and the side surface of the piston push plate (4) is in contact with the inner wall of the ripening tank body (1).

5. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 1, characterized in that: A perspective plate (31) is fixedly sleeved on the front of the maturation tank body (1), and a control panel (30) is fixedly mounted on the side of the maturation tank body (1).

6. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 1, characterized in that: A material injection pipe (18) is fixedly sleeved on the top surface of the maturation tank body (1), and a water injection pipe (19) is fixedly sleeved on the top surface of the maturation tank body (1).

7. A magnesium oxide powder for desulfurization aging, impurity removal and purification device according to claim 2, characterized in that: The inner side surface of the lifting seat (23) is in contact with the outer side surface of the ripening tank body (1).

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