Desulfurizing agent continuous humidifying and homogenizing device and method for high-rate ash calcium circulating desulfurization

Abstract

The invention provides a desulfurizing agent continuous humidifying and homogenizing device for high-rate ash calcium circulating desulfurization, which comprises a box body, the box body is provided with a feed port and a discharge port, a multi-shaft stirring assembly is erected between the feed port and the discharge port, and the multi-shaft stirring assembly comprises a plurality of independent main shafts; a plurality of groups of stirring mechanisms are arranged on each main shaft at intervals along the length direction of the axis, the positions of the groups of stirring mechanisms on each main shaft are arranged in a one-to-one correspondence manner, and adjacent stirring mechanisms with different shafts are arranged in a staggered manner; a humidifying box used for spraying atomized water to the double-shaft stirring mechanism is arranged on the side, close to the feeding opening, of the box body and corresponds to the upper portion of the stirring assembly. According to the invention, a mode of humidifying outside the reactor is adopted, circulating ash, a fresh desulfurizing agent and humidifying atomized water with different physical properties and addition proportions are continuously, quickly and uniformly mixed, a layer of uniform water film covers the surface of the mixed powder material, and good flow characteristics are still kept, so that the possible problems of wall adhesion and blockage are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of industrial flue gas pollutant treatment, and in particular to a desulfurizing agent continuous humidification and homogenization device and method for high-rate ash-calcium circulation desulfurization. Background Art

[0002] High-rate ash-calcium circulation flue gas desulfurization technology adopts a semi-dry process, which requires external process water humidification to meet the temperature, humidity, ionized medium and other process conditions required for the desulfurization reaction; in order to improve the utilization rate of the desulfurizer, the unreacted desulfurization ash is collected and recycled (high circulation rate). The humidification locations of different processes are different, mainly including: humidification inside the reactor, humidification outside the reactor, and humidification combined inside and outside the reactor.

[0003] According to the process requirements, it is necessary to quickly mix the fresh desulfurizer and the circulating ash in a certain proportion, and spray process water to increase humidity. Therefore, the homogenization degree (mixing uniformity) of the several materials directly affects the desulfurization effect and the stability of system operation. If the mixing effect is not good and the ash water is out of balance, it will not only affect the activity of the desulfurizer, but also may cause local blockage. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To achieve the above-mentioned purpose, the present invention proposes a desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulating desulfurization, comprising a box body, on which a feed port and a discharge port are arranged, a multi-axis stirring assembly is erected between the feed port and the discharge port, the multi-axis stirring assembly comprises a plurality of independent main shafts, each main shaft is provided with a plurality of groups of stirring mechanisms spaced apart along the length direction of the axis, the positions of each group of stirring mechanisms on each main shaft are arranged in a one-to-one correspondence, and adjacent stirring mechanisms of different axes are arranged alternately with each other, a humidification box for spraying atomized water in the direction of the dual-axis stirring mechanism is arranged on the box body close to the feed port and above the corresponding stirring assembly, and a power part for driving the two main shafts to rotate is arranged at one end of the box body corresponding to the two main shafts.

[0006] The present invention adopts a humidification method outside the reactor to achieve continuous, rapid and uniform mixing of several circulating ash, fresh desulfurizer and humidified atomized water with different physical properties and addition ratios. After mixing, the surface of the powder material is covered with a uniform water film and still maintains good flow characteristics, which provides the necessary conditions for the desulfurization reaction while avoiding the possible wall sticking and clogging problems.

[0007] Optionally, the stirring mechanism includes a plurality of stirring paddles arranged at equal angles along the main shaft section, each stirring paddle includes a connecting shaft fixedly connected to the main shaft, a blade for stirring is provided at the end of the connecting shaft, and a toothed structure is provided at the end of the blade.

[0008] Furthermore, the stirring paddle is provided with a stirring paddle cleaning assembly, and the stirring paddle cleaning assembly includes a first cleaning assembly sleeved on the connecting shaft and a second cleaning assembly arranged on the blade;

[0009] The first dust cleaning component is movably arranged along the axial direction of the connecting shaft;

[0010] One end of the second cleaning component is fixedly connected to the blade, and the other end of the second cleaning component is movably arranged on the surface of the blade.

[0011] Furthermore, a plurality of groups of atomizing nozzles are arranged on the top wall of the humidification box, and all the atomizing nozzles are arranged at corresponding positions between the two main axes. The number of atomizing nozzles is greater than 2, and each atomizing nozzle is arranged in two rows along the axis of the main axis, and the two rows of atomizing nozzles are staggered in different rows.

[0012] Furthermore, the atomizing nozzle is a flat fan-shaped atomizing nozzle, and the spray fan of each atomizing nozzle is set away from the two main axes, the angle between the spray fan and the main axis is set to 0-50°, and the atomized water spray angle is set to 10-120°.

[0013] Furthermore, the atomizing nozzle is outer-mounted with a protective sleeve for preventing the nozzle from being clogged by dust, and the protective sleeve is provided with a fluidizing nozzle arranged to make way for atomized water injection, so that the atomizing nozzle can work normally.

[0014] Furthermore, a main shaft cleaning piece is arranged between the corresponding adjacent stirring mechanisms on each main shaft, the main shaft cleaning piece is annularly sleeved on the main shaft, and the main shaft cleaning piece can be movably arranged along the axial direction of the main shaft.

[0015] Furthermore, the feed port is configured as a cylindrical structure connected to the box body, the feed port includes a desulfurizer feed port and a circulating ash feed port, and a static mixing component for premix is ​​provided on the inner wall of the cylindrical structure of the feed port;

[0016] The static mixing assembly includes multiple groups of first mixing plates corresponding to the lower part of the desulfurizer feed port and multiple groups of second mixing plates arranged below the circulating ash feed port. The ends of the first mixing plates and the second mixing plates facing the axis of the feed port are inclined lower than the fixed ends thereof and the inner wall of the feed port.

[0017] Furthermore, multiple groups of the first mixing plates and multiple groups of the second mixing plates are arranged in one-to-one correspondence, the horizontal projections of the first mixing plates and the second mixing plates facing each other have overlapping parts, and a gap for materials to fall is provided between the first mixing plates and the second mixing plates in the same row.

[0018] Furthermore, multiple groups of the first mixing plates and multiple groups of the second mixing plates are arranged in a one-to-one correspondence in the same row, and there is a gap between the end of the first mixing plates and the end of the second mixing plates in the same row for materials to fall, and auxiliary mixing pieces for separating and mixing materials falling from above the materials are arranged at corresponding gap positions between adjacent rows, and a separation angle is arranged at a cross-section of the auxiliary mixing piece corresponding to the gap, and the separation angle is arranged opposite to the center line of the gap.

[0019] Furthermore, an overflow plate is provided in the box body at a position corresponding to the discharge port along a direction perpendicular to the main axis.

[0020] The present invention also provides a method for continuous humidification and homogenization of a desulfurizing agent for high-rate ash-calcium circulation desulfurization, comprising the following steps:

[0021] Put fresh desulfurizer and circulating ash into the desulfurizer feed port and circulating ash feed port respectively, and preliminarily mix the desulfurizer and circulating ash through the static mixing component to control the mass proportion of fresh desulfurizer to ≤20%;

[0022] Start the multi-axis stirring assembly. Under the action of the dual-axis stirring shaft assembly and the stirring mechanism, the materials are mixed and transported along the main shaft toward the discharge port. During the mixing and transporting process, the atomizing nozzle of the humidification box is turned on to humidify the materials being mixed and transported in the box. The water mist particle size is ≥100 mesh, and the water-solid ratio is controlled to be ≤10%;

[0023] The material is humidified in the box, and the solid-liquid mixing residence time is 1-10 minutes, so that the solid and liquid are fully mixed, taking into account the mixing uniformity and continuous transportation. After the mixing is completed, the material is sent out from the discharge port.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0026] Figure 1 It is a schematic front view of the overall structure of the desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention;

[0027] Figure 2 It is a schematic side view of the overall structure of a desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention;

[0028] Figure 3 It is a schematic diagram of the atomization humidification and water control system of the desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention;

[0029] Figure 4 It is a schematic diagram of the location of the atomizing nozzle of the desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention;

[0030] Figure 5 It is a schematic diagram of the structure of the static mixing component of the feed inlet of the desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of another static mixing component of the feed inlet of the desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to the present invention.

[0032] Description of reference numerals:

[0033] 1. Box body; 2. Power parts; 3. Humidifier box; 31. Atomizing nozzle; 32. Hose; 33. Control valve; 34. Inspection valve; 35. Nozzle branch pipe; 4. Multi-axis stirring assembly; 41. Main shaft; 42. Stirring mechanism; 421. Connecting shaft; 422. Blade; 5. Overflow plate; 6. Main shaft cleaning assembly; 7. Drain valve; 8. Feed inlet; 81. Circulating ash feed inlet; 82. Desulfurizer feed inlet; 83. Static mixing assembly; 831. First mixing plate; 832. Second mixing plate; 833. Auxiliary mixing element; 9. Discharge port; 10. Side wall inspection port; 11. Cover plate inspection port; 12. Inspection window; 13. Agitator paddle cleaning assembly; 131. First cleaning assembly; 132. Second cleaning assembly. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The present invention provides a desulfurizing agent continuous humidification homogenization device for high-rate ash-calcium circulation desulfurization, as shown below Figures 1 to 6 Elaborate in detail.

[0036] A desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization comprises a box body 1, which may be square, round, or arc-bottomed. A feed port 8 and a discharge port 9 are provided on the box body 1, and a multi-axis stirring assembly 4 is arranged between the feed port 8 and the discharge port 9. The multi-axis stirring assembly 4 comprises a plurality of independent main shafts 41, and a plurality of groups of stirring mechanisms 42 are arranged at intervals along the length direction of the axis on each main shaft 41, and the positions of each group of stirring mechanisms 42 on the plurality of main shafts 41 are arranged one by one, and adjacent stirring mechanisms 42 of different axes are arranged alternately with each other. In one embodiment, two independent main shafts 41 are provided, and a humidification box 3 for spraying atomized water in the direction of the dual-axis stirring mechanism 42 is provided on the side of the box body 1 close to the feed port 8 and corresponding to the stirring assembly 4. A power part 2 for driving the two main shafts 41 to rotate is provided at one end of the box body 1 corresponding to the two main shafts 41, and the power part 2 is arranged as a motor, and the number of motors is set to 1-2.

[0037] The box body 1 provides a closed scene for mixing. The two main shafts 41 of the multi-axis stirring assembly 4 drive the stirring mechanism 42 on each main shaft 41 to mix and stir the materials of different proportions entering the box body 1. The humidification box 3 can provide atomized water for the materials while stirring. The atomized water will adhere to the surface of the materials to achieve the effect of atomizing and humidifying the materials. The present invention adopts an external reactor humidification method to achieve continuous, rapid and uniform mixing of several circulating ashes with different physical properties and added proportions, fresh desulfurizers and humidified atomized water. The mixing uniformity is ≤±5%. After mixing, the surface of the powder material is covered with a uniform water film and still maintains good flow characteristics. While providing the necessary conditions for the desulfurization reaction, possible wall sticking and clogging problems are avoided.

[0038] There are multiple main shafts 41 in the box 1, and each main shaft 41 is provided with multiple stirring mechanisms 42. When working, the main shaft 41 is driven by the power part 2, and the two shafts rotate at the same time (rotation direction is opposite or the same), and the circulating ash and fresh desulfurizer enter, and the humidification box 3 provides atomized water to spray on the surface of the solid material. The stirring mechanism 42 on the main shaft 41 drives the material to move, so that several materials are mixed and driven by the shaft to move forward slowly. An overflow baffle is set at the rear of the box 1. When the device is working, the material is fed quantitatively and continuously, and the humidification water is added continuously in proportion.

[0039] In some embodiments, the stirring mechanism 42 includes a plurality of stirring paddles arranged at equal angles along the cross section of the main shaft 41, each stirring paddle includes a connecting shaft 421 fixedly connected to the main shaft 41, and a blade 422 for stirring is arranged at the end of the connecting shaft 421, and a toothed structure is arranged at the end of the blade 422. The blade 422 of the stirring paddle can effectively stir the material in the box 1, and the structure with equal angles can increase the stirring frequency in the same cross section. In one embodiment, a single stirring mechanism 42 is provided with four stirring paddles at 90° intervals on the cross section of the main shaft 41, and the stirring paddles of different axes are inserted into the gap between the two stirring paddles on the adjacent main shafts 41, and each stirring paddle is in the gap between the two stirring paddles of the adjacent main shafts 41 while the main shaft 41 keeps rotating, and the shape of the blade 422 of the stirring paddle can be paddle-shaped, triangular, square, plow-shaped, etc. The serrated structure can, on the one hand, scrape the material; on the other hand, when stirring the material, the tooth structure will push the material in front of the tooth to both sides, and the materials of adjacent teeth will be mixed at the corresponding position of the gap between the two teeth, further enhancing the mixing and stirring effect. Thirdly, the agglomerated powder produced in the material can be broken up, thereby reducing the agglomeration of the material.

[0040] In some embodiments, a stirring paddle cleaning assembly 13 is provided on the stirring paddle, including a first cleaning assembly 131 sleeved on the connecting shaft 421, the first cleaning assembly 131 can be axially movable along the connecting shaft 421, and a second cleaning assembly 132 is provided on the blade 422, one end of the second cleaning assembly 132 is fixedly connected to the blade 422, and the other end can be movably provided on the surface of the blade 422. The first cleaning component 131 can clean the materials accumulated on the connecting shaft 421. In one embodiment, a power element for driving the first cleaning component 131 to move along the connecting shaft 421 is provided on the connecting shaft 421, which can be a cylinder, a motor, an electric telescopic rod, a hydraulic rod, etc. The second cleaning component 132 can clean the accumulated materials on the blade 422, so that the movable end of the second cleaning component 132 rotates with the fixed end as the center of the circle, and the fan-shaped surface is cleaned on the surface of the blade 422. In one embodiment, a power element for driving the second cleaning component 132 to rotate along the fixed end as the center of the circle is provided on the blade 422, which can be a rotating cylinder, a motor, etc. The second cleaning component 132 can be in various shapes, such as dumbbell shape, awl shape, etc.

[0041] In some embodiments, a plurality of groups of atomizing components are arranged on the top wall of the humidifying box 3, and the atomizing components include atomizing nozzles 31, and all atomizing nozzles 31 are arranged at corresponding positions between the two main shafts 41, the number of atomizing nozzles 31 is greater than 2, and each atomizing nozzle 31 is arranged in two rows along the axial direction of the main shaft 41, and the two rows of atomizing nozzles 31 are staggered in different rows. The atomizing nozzles 31 are arranged in two rows to correspond to the two main shafts 41 for atomizing water spraying, and the staggered arrangement of different rows can reduce the repeated coverage area, and the number of atomizing nozzles 31 can be reduced without affecting the atomization quality, and the investment can be reduced. In order to enhance the atomization effect, the humidifying water is in the form of fine mist, and the water particle size is less than 100 microns. In order to ensure the atomization effect, the pressure before the nozzle is controlled to be 0.4-2MPa.

[0042] The humidification box 3 is provided with an atomization humidification water control system for controlling the atomization nozzle 31, including a humidification jellyfish tube, and a manual valve for total water flow control is provided on the humidification jellyfish tube. A nozzle branch pipe 35 is provided downstream of the manual valve corresponding to each atomization nozzle 31. A maintenance valve 34 and a control valve 33 are provided in sequence on each nozzle branch pipe 35 in a direction away from the manual valve. The downstream of the control valve 33 is connected to the atomization nozzle 31 through a hose 32. The setting of the hose 32 can facilitate the position adjustment of each atomization nozzle 31. In some embodiments, a humidification water homogenizer is connected to the end of the atomization nozzle 31. The quick-install design of each connection port can realize online rapid adjustment, replacement and maintenance. The control valve 33 can be pneumatically controlled or electrically controlled, and the valve type can be a solenoid valve or a ball valve. The switch response is required to be fast, and the response time is preferably ≤10s.

[0043] In some embodiments, the atomizing nozzle 31 is a flat fan-shaped atomizing nozzle 31, and the spray fan of each atomizing nozzle 31 is set to avoid the two main shafts 41, the angle between the spray fan and the main shaft 41 is set to 0-50 degrees, and the spray angle of the atomized water is set to 10-120 degrees. The setting of the spray angle can effectively avoid the two main shafts 41, thereby facilitating the atomized spray coverage of the material and reducing the probability of the atomization quality being reduced due to the spraying of the atomized water onto the main shaft 41.

[0044] In some embodiments, the atomizing nozzle 31 is provided with a protective sleeve for preventing the nozzle from being clogged by dust, and the protective sleeve is provided with a fluidizing nozzle provided to make way for the atomized water spray, so that the atomizing nozzle 31 can work normally. The provision of the protective sleeve can reduce the occurrence of materials raised during the stirring process adhering to the atomizing nozzle 31 and clogging the atomizing nozzle 31 under the action of the atomized water, thereby protecting the atomizing nozzle 31. In one embodiment, in order to further ensure the rated normal operation of the protective sleeve, compressed air is regularly introduced into the nozzle opening for blowing, cleaning the contamination and preventing the nozzle from being clogged.

[0045] In some embodiments, a main shaft cleaning component 6 is provided between each main shaft 41 and the corresponding adjacent stirring mechanisms 42. The main shaft cleaning component 6 is annularly sleeved on the main shaft 41, and the main shaft cleaning component 6 can be axially movable along the main shaft 41. The main shaft cleaning component 6 can clean the material accumulated on each main shaft 41, avoiding the problem of reduced material discharge caused by material accumulation on the main shaft 41, and the problem of obstruction of the connection of the main shaft 41 rotating structure and the connection position of the main shaft 41 and the stirring mechanism 42 caused by the material sticking to the main shaft 41 for a long time. The main shaft cleaning component 6 can be circular, square, or irregularly shaped.

[0046] In some embodiments, in order to premix the materials and thus enhance the mixing effect of the materials during the stirring process, a feed premixing box is provided at the feed port 8, and the feed port 8 is provided as a cylindrical structure connected to the box body 1, including a desulfurizer feed port 82 and a circulating ash feed port 81. A static mixing assembly 83 for premixing is provided on the inner wall of the cylindrical structure of the feed port 8. The static mixing assembly 83 includes a plurality of first mixing plates 831 corresponding to the lower part of the desulfurizer feed port 82, and a plurality of second mixing plates 832 provided under the circulating ash feed port 81. The first mixing plate 831 and the second mixing plate 832 are inclined at one end facing the axis of the feed port 8 and lower than the fixed end of the inner wall of the feed port 8. After the desulfurizer and the circulating ash enter from different feed ports 8 at the same time, they will fall toward the middle together under the action of the first mixing plate 831 and the second mixing plate 832, and the materials will be mixed, thereby completing the premixing.

[0047] In some embodiments, in order to enhance the premixing effect, multiple groups of first mixing plates 831 and multiple groups of second mixing plates 832 are arranged in one-to-one correspondence, and the projections of the first mixing plates 831 and the second mixing plates 832 facing each other in the horizontal direction have an overlapping part, and a gap for the material to fall is provided between the first mixing plates 831 and the second mixing plates 832 in the same row, that is, the material will fall on the second mixing plate 832 after falling from the first mixing plate 831, and then fall on the next first mixing plate 831. The material passes through the multiple groups of first mixing plates 831 and the second mixing plates 832 in turn, and the desulfurizer and circulating ash put in at the same time will be mixed multiple times in the process of such material falling, thereby enhancing the mixing effect.

[0048] In some embodiments, in order to enhance the premixing effect, another structure is proposed, in which multiple groups of first mixing plates 831 and multiple groups of second mixing plates 832 are arranged in a row in a one-to-one correspondence, and there is a gap between the end of the first mixing plate 831 and the end of the second mixing plate 832 in the same row for materials to fall. Auxiliary mixing pieces 833 for separating and mixing materials falling from above the materials are arranged at the corresponding gap positions between adjacent rows, and a separation angle is arranged at the cross-section of the auxiliary mixing piece 833 corresponding to the gap, and the separation angle is arranged opposite to the center line of the gap, that is, after the desulfurizer and the circulating ash enter from the two feed ports 8, they will fall on the first mixing plate 831 and the second mixing plate 832 respectively, and then the materials will enter the gap downward. Under the action of the separation angle of the auxiliary mixing piece 833, the materials are diverted to both sides and fall into the next group of first mixing plates 831 and second mixing plates 832, and then fall into the next auxiliary mixing piece 833 again. After the desulfurizer and the circulating ash enter the feed port 8 at the same time, the falling path falls in sequence according to the above situation, thereby achieving multiple mixing and enhancing the mixing effect.

[0049] In some embodiments, an overflow plate 5 is provided at the position of the discharge port 9 in the box body 1 along the direction of the vertical main axis 41. The overflow plate 5 is provided at the rear of the box body 1 so that a certain amount of material is always present in the equipment box body 1, thereby extending the residence time of the material, enhancing the mixing effect, and ensuring that the residence time of the material in the box body 1 is 1-10 minutes. As new material is continuously added to the feed port 8, the fresh material is fully stirred in the box body 1 after humidification, and is slowly moved to the rear of the box body 1 driven by the multi-axis stirring assembly 4, and is discharged from the discharge port 9 over the overflow baffle. The height of the overflow baffle is determined according to the amount of material stored in the box body 1, and the ratio of the baffle height to the height of the box body 1 is controlled at 0.5-0.9.

[0050] In some embodiments, in order to facilitate the maintenance of the internal components of the box body 1, a side wall inspection port 10 is provided on the side wall of the box body 1, a cover inspection port 11 is provided above the tail of the box body 1, and a plurality of inspection windows 12 are provided on the side wall of the box body 1, so that the staff can conveniently inspect the equipment inside the box body 1. At the same time, an emptying valve 7 is provided on the bottom wall of the box body 1 near the discharge port 9, and is provided in front of the overflow plate 5. After opening, the remaining materials in the box body 1 can be completely and quickly emptied, so that the staff can quickly empty the materials in the box body 1 for maintenance.

[0051] The cover of the box 1 is designed to be detachable in blocks; a quick-open cover inspection port 11 is provided on the top of the box 1, which can be square or round, and adopts a reliable sealing form, which is convenient for disassembly and ensures the sealing effect. An inspection window 12 is provided on the side wall of the box 1, and a mechanical or fluidized purge lens mechanism is provided inside to monitor the state of the materials in the mixer at any time.

[0052] The present invention also provides a method for continuous humidification and homogenization of a desulfurizing agent for high-rate ash-calcium circulation desulfurization, comprising the following steps:

[0053] Put fresh desulfurizer and circulating ash into the desulfurizer feed port 82 and the circulating ash feed port 81 respectively, and preliminarily mix the desulfurizer and circulating ash through the static mixing component 83, and control the mass proportion of fresh desulfurizer to be ≤20%;

[0054] The multi-axis stirring assembly 4 is started. Under the action of the dual-axis stirring shaft assembly and the stirring mechanism 42, the materials are mixed and transported along the axial direction of the main shaft 41 toward the discharge port 9. During the mixing and transporting process, the atomizing nozzle 31 of the humidifying box 3 is opened to humidify the materials being mixed and transported in the box body 1. The water mist particle size is ≥100 meshes to ensure that the sprayed atomized water is uniform and there are no visible water droplets.

[0055] And the water content is the key factor affecting the fluidity of the powder. To ensure that the solid material has good fluidity, the water-solid ratio needs to be strictly controlled within the range of movement, and the maximum water-solid ratio is preferably ≤10%;

[0056] The material is humidified in the box 1, and the solid-liquid mixing residence time is within 1-10 minutes, so that the solid and liquid are fully retained and mixed, taking into account the mixing uniformity and continuous transportation. After the mixing is completed, the material is sent out from the discharge port 9.

[0057] When fresh desulfurizer and recycled ash are added, the materials will be pre-mixed under the action of the static mixing component 83 in the feed port 8, and after being preliminarily mixed, they will enter the box body 1 for mixing and stirring.

[0058] During the mixing process, by controlling the paddle cleaning component and the main shaft cleaning component 6, the powder can be crushed, arched, and wall-scratched to prevent local agglomeration, wall adhesion, and even compaction during the material humidification and mixing process.

[0059] The material output after mixing is solid material, which is dry as a whole and has good fluidity. The mixing uniformity can reach RSD≤±5%, and there is no obvious agglomeration, wall adhesion, caking and other phenomena.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A desulfurizer continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization, characterized in that: It comprises a box body, on which a feed inlet and a discharge port are provided, a multi-axis stirring assembly is arranged between the feed inlet and the discharge port, the multi-axis stirring assembly comprises a plurality of independent main shafts, each main shaft is provided with a plurality of stirring mechanisms at intervals along the length direction of the axis, the positions of each stirring mechanism group on each main shaft are arranged in a one-to-one correspondence, adjacent stirring mechanisms of different axes are arranged alternately with each other, a humidification box for spraying atomized water in the direction of the dual-axis stirring mechanism is arranged on the side of the box body close to the feed inlet and above the corresponding stirring assembly, and a power part for driving the two main shafts to rotate is arranged at one end of the box body corresponding to the two main shafts.

2. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 1 is characterized in that: The stirring mechanism comprises a plurality of stirring paddles arranged at equal angles along the cross section of the main shaft, each stirring paddle comprises a connecting shaft fixedly connected to the main shaft, a blade for stirring is arranged at the end of the connecting shaft, and a toothed structure is arranged at the end of the blade.

3. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 2 is characterized in that: The stirring paddle is provided with a stirring paddle cleaning assembly, which includes a first cleaning assembly sleeved on the connecting shaft and a second cleaning assembly arranged on the blade; The first dust cleaning component is movably arranged along the axial direction of the connecting shaft; One end of the second cleaning component is fixedly connected to the blade, and the other end of the second cleaning component is movably arranged on the surface of the blade.

4. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 1 is characterized in that: A plurality of groups of atomizing nozzles are arranged on the top wall of the humidifying box, and all the atomizing nozzles are arranged at corresponding positions between the two main shafts. The number of the atomizing nozzles is greater than 2, and each atomizing nozzle is arranged in two rows along the axis of the main shaft, and the two rows of atomizing nozzles are staggered in different rows.

5. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 4 is characterized in that: The atomizing nozzle is a flat fan-shaped atomizing nozzle, and the spray fan of each atomizing nozzle is set away from two main axes, the angle between the spray fan and the main axis is set to 0-50°, and the spray angle of atomized water is set to 10-120°.

6. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to any one of claims 4 or 5, characterized in that: The outer sleeve of the atomizing nozzle is provided with a protective sleeve for preventing the nozzle from being clogged by dust, and the protective sleeve is provided with a fluidizing nozzle arranged to make way for atomized water injection, so that the atomizing nozzle can work normally.

7. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 1 is characterized in that: A main shaft cleaning piece is arranged between the corresponding adjacent stirring mechanisms on each main shaft. The main shaft cleaning piece is sleeved on the main shaft in an annular shape and can be movably arranged along the axial direction of the main shaft.

8. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 1 is characterized in that: The feed inlet is configured as a cylindrical structure connected to the box body, the feed inlet includes a desulfurizer feed inlet and a circulating ash feed inlet, and a static mixing component for premix is ​​provided on the inner wall of the cylindrical structure of the feed inlet; The static mixing assembly includes multiple groups of first mixing plates corresponding to the lower part of the desulfurizer feed port and multiple groups of second mixing plates arranged below the circulating ash feed port. The ends of the first mixing plates and the second mixing plates facing the axis of the feed port are inclined lower than the fixed ends thereof and the inner wall of the feed port.

9. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 8 is characterized in that: Multiple groups of the first mixing plates and multiple groups of the second mixing plates are arranged in one-to-one correspondence, the horizontal projections of the first mixing plates and the second mixing plates facing each other have overlapping parts, and a gap for materials to fall is arranged between the first mixing plates and the second mixing plates in the same row.

10. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 8, characterized in that: Multiple groups of the first mixing plates and multiple groups of the second mixing plates are arranged in a row in a one-to-one correspondence, and there is a gap between the end of the first mixing plates and the end of the second mixing plates in the same row for materials to fall. Auxiliary mixing pieces for separating and mixing materials falling from above the materials are arranged at corresponding gap positions between adjacent rows, and a separation angle is arranged at a cross-section of the auxiliary mixing piece corresponding to the gap, and the separation angle is arranged opposite to the center line of the gap.

11. The desulfurizing agent continuous humidification and homogenization device for high-rate ash-calcium circulation desulfurization according to claim 1, characterized in that: An overflow plate is arranged in the box body at a position corresponding to the discharge port along a direction perpendicular to the main axis.

12. A method for continuous humidification and homogenization of desulfurizer for high-rate ash-calcium circulation desulfurization, characterized in that: The following steps are involved: Put fresh desulfurizer and circulating ash into the desulfurizer feed port and circulating ash feed port respectively, and preliminarily mix the desulfurizer and circulating ash through the static mixing component to control the mass proportion of fresh desulfurizer to ≤20%; Start the multi-axis stirring assembly. Under the action of the dual-axis stirring shaft assembly and the stirring mechanism, the materials are mixed and transported along the main shaft toward the discharge port. During the mixing and transporting process, the atomizing nozzle of the humidification box is turned on to humidify the materials being mixed and transported in the box. The water mist particle size is ≥100 mesh, and the water-solid ratio is controlled to be ≤10%; The material is humidified in the box, and the solid-liquid mixing residence time is 1-10 minutes, so that the solid and liquid are fully mixed, taking into account the mixing uniformity and continuous transportation. After the mixing is completed, the material is sent out from the discharge port.

Images