Filter cartridge base for dedusting tail gas of furnace

Abstract

The utility model relates to a filter cartridge base for dedusting tail gas of a furnace kiln. The filter cartridge base comprises a base body, a plug block and a plurality of driving mechanisms, the driving mechanism comprises a transmission unit capable of stretching out and drawing back in the vertical direction. The seat body is fixedly connected with the lower end of the filter cartridge. A through hole is formed in the upper end face of the seat body, an annular inclined face is formed on the periphery of the through hole, and the lower side of the annular inclined face is close to the through hole. A plurality of counter bores correspondingly matched with the driving mechanisms are formed in the periphery of the lower port of the through hole in the seat body. The upper portion of the plug block can be matched with the through hole in a molded surface contact matching mode, and a plurality of connecting arms matched with the driving mechanisms are formed on the lower portion of the plug block. The upper portion of the driving mechanism is fixed in the counter bore, the lower portion of the driving mechanism is fixedly connected with the connecting arm, and the upper portion of the plug block can be inserted into the through hole and moved out of the through hole in a switching mode along with the telescopic action of the transmission unit. According to the utility model, the plugging and opening states of the lower port of the filter cartridge can be stably and reliably controlled.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the industrial furnace kiln tail gas dust removal technical field, concretely relates to the filter cartridge base for kiln tail gas dust removal. BACKGROUND

[0002] In the past industrial furnace kiln tail gas treatment system, the dry dust removal mode is widely used, wherein the working process of the bag type dust removal unit is as follows: initially, the dust-containing tail gas passes through the fiber layer of the bag wall, large particle dust collides with the bag wall and is blocked outside the filter bag, and under the action of gravity, falls into the cone cylinder segment arranged in the lower part of the dust removal tower tank (referred to as tower tank), and part of the fine dust particles with small volume enter the fiber mesh of the bag wall and are blocked. As more and more dust particles are blocked and adhered to the outer surface of the filter bag, the fine particles with small volume are also blocked outside the fiber layer of the filter bag under the influence of diffusion, electrostatic and other physical effects. Therefore, for a long period of time, as the thickness of the dust on the outer surface of the filter bag increases, the dust removal efficiency of the bag type dust removal unit also increases, and the resistance of the dust-containing tail gas flow passing through the fiber layer of the filter bag bag wall also increases. When the pressure on both sides of the filter bag fiber layer (i.e. the inner and outer sides of the bag wall of the filter bag) increases to a certain extent, the ventilation volume of the dust removal unit will decrease significantly. At this time, the dust removal unit needs to be started, and the dust removal measures such as mechanical shaking and / or air flow back blowing are used to remove the dust covering the outer surface of the filter bag. Therefore, at least two groups of bag type dust removal units need to be arranged in the tower tank, and part of the dust in the filtered tail gas is in a running state, and the remaining part is in a dust cleaning / ash removal running state. Finally, by continuously switching the running state between the two parts of the dust removal unit, the dust removal tower tank can be kept in a continuous dust removal running state.

[0003] However, the water vapor content in the tail gas of the industrial furnace using hydrocarbons and hydrogen as fuel is very high. When the above-mentioned bag type dust collector is used to filter the smoke dust with high humidity combustion tail gas characteristics, the conductivity of the water contained in the tail gas will cause the electrostatic adsorption characteristics between the filter bag fiber and the fine smoke dust / particle and between the fine smoke dust particles to fail, and the adsorption dust removal capacity of the filter bag will be greatly reduced. In addition, the water in the combustion tail gas is also prone to condensation on the fiber layer of the filter bag, and is easy to mix with the smoke dust particles in the tail gas to form mud and slurry. Because there is a strong entanglement between the flexible fiber constituting the filter bag filter layer and the sewage and sludge, no matter mechanical shaking or air flow back blowing is used, the current commonly used ash removal measures cannot effectively remove the mud and slurry entangled on the flexible fiber layer of the filter bag, and cannot promote the filter bag to keep in a good filtering efficiency state for a long time. Therefore, the filter bag replacement frequency is relatively high, which greatly increases the operation cost of the dust removal system, and the applicability is relatively limited.

[0004] To overcome the above problems, the applicant designs a filter cartridge, and the filter cartridge is a rigid structure cartridge body which can be made by powder forming process and other ways, and a large number of filtering micropores are formed on the cartridge wall of the finished filter cartridge. Figure 6 As shown in the figure, similar to the bag type dust removal device, the dust removal tank 200 and the clean gas chamber 300 matched with the filter cartridge 10 are fixed on the base 100. The filter cartridge 10 is arranged in the dust removal tank 200 and connected with the upper part of the tank cavity of the dust removal tank 200 through the fixing seat 11 and arranged above the conical cavity 202. The tank cavity of the dust removal tank 200 is communicated with the clean gas chamber 300 through the cartridge wall and the upper port of the filter cartridge 10. The fan arranged at the exhaust end interface 301 of the clean gas chamber 300 can form a negative pressure space in the clean gas chamber 300, so that the tail gas is sucked into the dust removal tank 200 through the sending end structure 201, and after the filtering and separation treatment of the filter cartridge 10, the dust-free tail gas enters the clean gas chamber 300. The separated dust falls into the conical cavity 202 under the action of gravity and is finally discharged through the control valve 203. The backwashing unit 400 arranged can backwash the dirt attached in the micropores of the filter cartridge 10 when the micropores reach the degree of excessive blockage, so that the air permeation filtering performance of the filter cartridge 10 is restored. In order to realize the filtering operation and the backwashing operation of the filter cartridge 10, the valve cover unit needs to be arranged at the lower end of the filter cartridge 10, so that the lower port of the filter cartridge 10 can be controlled to be kept in the closed state and the open state. Content of the utility model

[0005] In order to realize the above object, the utility model provides a filter cartridge base for kiln tail gas dust removal, which can keep the lower port of the filter cartridge in the closed state during the filtering operation and keep the lower port of the filter cartridge in the open state during the backwashing operation.

[0006] The technical scheme adopted by the utility model to solve the technical problem is: a filter cartridge base for kiln tail gas dust removal, comprising a seat body, a plug and a plurality of driving mechanisms. The driving mechanism comprises a transmission unit capable of extending and retracting in the vertical direction.

[0007] The seat body is fixedly connected with the lower end of the filter cartridge. A through hole is formed in the center area of the upper end face of the seat body, and an annular inclined surface is formed around the through hole, so that the outer ring height of the annular inclined surface is higher than the inner ring height. A type groove is formed on the lower end face of the seat body at the lower port of the through hole, and a plurality of counterbore holes matched with the driving mechanisms are formed around the type groove.

[0008] The upper part of the plug is matched with the through hole in the form of surface contact, so that when the plug is inserted into the through hole, the through hole can be completely blocked. A plurality of connecting arms corresponding to the driving mechanism are formed in the lower part of the plug. The connecting arms extend downwardly and obliquely away from the axis. End plates extending transversely are formed at the lower ends of the connecting arms. The upper end of the driving mechanism is fixed in the counterbore, and the lower end is fixedly connected with the end plate, so that the upper part of the plug is inserted into the through hole and moved out of the through hole downwardly to control the open and closed states of the lower end of the filter cartridge.

[0009] Optionally, the through hole is a tapered hole, and the narrow end of the tapered hole faces upward. Correspondingly, a tapered surface is formed in the upper part of the plug, and the large-diameter end of the tapered surface faces downward. The axial extension length of the tapered surface is greater than the axial extension length of the tapered hole. When the tapered surface extends into the tapered hole, the middle and lower outer circumferential surface of the tapered surface can be in contact with the inner circumferential surface of the tapered hole to form a matching relationship of surface contact, so that the tapered hole can be blocked.

[0010] When the driving unit extends and retracts, the tapered surface can be driven to insert into the tapered hole to block the tapered hole, and the tapered surface can be driven to move out of the tapered hole to form a radial gap between the tapered surface and the relative circumferential surface of the tapered hole, so that the tapered hole remains in an open state.

[0011] Optionally, the top surface of the plug is formed as a protruding spherical surface.

[0012] Optionally, the driving unit includes a housing, an end cap provided at the lower end of the housing, a core rod provided in the housing, an electromagnet portion fixed to the upper part of the housing, a permanent magnet portion fixed to the upper end of the core rod, and a second spring. The core rod can move vertically relative to the housing.

[0013] The upper part of the housing extends into the counterbore and is fixedly connected with the seat body. The upper part of the core rod extends into the housing, and the lower part extends out of the end cap and is fixedly connected with the end plate. A radial flange is formed in the middle part of the core rod, and the second spring is sleeved on the core rod, with both ends of the second spring in contact with the radial flange and the end cap, respectively.

[0014] When the electromagnet portion is in an energized state, it can exert a force on the permanent magnet portion and can promote the core rod to move downward relative to the housing, further compressing the second spring.

[0015] When the electromagnet portion is in a de-energized state, the second spring can push the core rod to move upward relative to the housing.

[0016] Optionally, the end cap is matched with the lower part of the housing through a threaded structure, so that the end cap can move up and down. An axial flange is formed on the inner bottom surface of the end cap, and the axial flange extends into the lower end lumen of the housing. An annular recess is formed on the upper end surface of the axial flange, which can accommodate the lower end of the second spring.

[0017] The screwing of the end cap to make it move up and down relative to the shell can adjust the initial compression degree of the second spring, and the push force of the second spring on the core rod is adjusted, so that the core rod can pull the plug to move up, and the plug can fully block the through hole / conical hole to maintain a stable and reliable blocking state.

[0018] Optionally, an annular flange extending in the vertical direction is formed on the upper part of the seat body, and an annular recess is formed on the upper end surface of the annular flange. The lower end of the filter cartridge is inserted into the annular recess and connected together with the seat body.

[0019] The beneficial effects of the present application are: the present application is arranged at the lower end of the filter cartridge, the plug contained therein can be switched to change the cooperation state with the through hole arranged on the seat body, and the lower end of the filter cartridge can be kept in a blocked state during the filtering operation, and the lower end of the filter cartridge can be kept in an open state during the backwashing operation, so that the filter cartridge can be restored to the breathable filtering state. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Structure diagram of the filter cartridge matched with the base (conical hole in the conducting state).

[0021] Figure 2 Structure diagram of the base from the top.

[0022] Figure 3 Structure diagram of the base from the bottom.

[0023] Figure 4 Structure diagram of the filter cartridge matched with the base (conical hole in the blocking state).

[0024] Figure 5 Structure diagram of the driving mechanism.

[0025] Figure 6 Structure diagram of the base matched with the filter cartridge when arranged in the dust removal tank.

[0026] In the diagram: 100 Base; 200 Dust collector, 201 Feed port, 202 Conical cavity, 203 Control valve, 300 Clean air chamber, 301 Discharge port; 400 Backwashing unit; 10 Filter cartridge, 11 Mounting base; 20 Filter cartridge base, 21 Base body, 211 Annular flange, 2111 Annular recess, 212 Upper end face, 2121 Annular inclined surface, 2122 Conical hole, 213 Slot, 214 Countersunk hole, 22 Plug 221 Conical surface, 2211 Spherical surface, 222 Connecting arm, 2221 End plate, 23 Drive mechanism; 231 Housing, 2311 Cylinder body one, 2312 Cylinder body two, 232 End cap, 2321 Axial flange, 233 Core rod, 2331 Rod part one, 2332 Rod part two, 2333 Radial flange, 234 Stud, 235 Electromagnet part, 236 Permanent magnet part, 237 First spring, 238 Second spring, 239 Rubber ring. Detailed Implementation

[0027] The structures, proportions, and sizes shown in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, terms such as "upper," "lower," "front," "rear," and "middle" used in this specification are merely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0028] like Figures 1 to 5 The filter cartridge base shown includes a base body 21, a plug block 22 and four drive mechanisms 23.

[0029] The base body 21 is fixedly connected to the lower end of the filter cartridge 10 to form an integral unit, wherein the upper end surface 212 of the base body 21 forms the inner bottom surface of the filter cartridge 10. Specifically, an annular flange 211 extending vertically is formed on the upper part of the base body 21, and an annular groove 2111 is formed on the upper end surface of the annular flange 211. The lower end of the filter cartridge 10 is inserted into the annular groove 2111, and the lower part of the filter cartridge 10 is connected to the base body 21 by bolts, screws or rivets.

[0030] A through hole (i.e. the tapered hole 2122 shown in the figure) is formed in the center of the upper end surface 212 of the seat body 21, and an annular inclined surface 2121 is formed around the through hole, with the outer ring of the annular inclined surface 2121 being higher than the inner ring. The inner ring of the annular inclined surface 2121 is flush with the upper end surface 212. The annular inclined surface 2121 can cause the backwash sewage to quickly converge towards the through hole, and can help to prevent the backwash sewage from depositing on the upper end surface 212 of the seat body 21.

[0031] A groove 213 is formed on the lower end surface of the seat body 21, corresponding to the lower end of the through hole, and four counterbores 214 are formed around the groove 213, each corresponding to one of the drive mechanisms 23. The inner diameter of the groove 213 is larger than the maximum inner diameter of the through hole.

[0032] The upper part of the plug 22 can be matched with the through hole in a form of surface contact. Four connecting arms 222 are formed on the lower part of the plug 22, each corresponding to one of the drive mechanisms 23. The connecting arms 222 each extend downwardly and obliquely away from the axis of the plug 22. An end plate 2221 is formed on the lower end of each connecting arm 222.

[0033] The drive mechanism 23 includes a transmission unit that can extend and retract in the vertical direction. The upper end of the drive mechanism 23 is fixed in the counterbores 214, and the lower end is fixedly connected with the end plate 2221, so that the upper part of the plug 22 can be inserted into and moved out of the through hole in a switching manner, in conjunction with the extension and retraction of the transmission unit. When the upper part of the plug 22 is fully matched with the through hole in a form of surface contact, the through hole can be kept in a closed state. When the plug 22 moves downwardly and the upper part of the plug 22 moves out of the through hole, the through hole can be kept in an open state.

[0034] The groove 213 formed on the lower part of the seat body 21 can provide a space for the connecting arms 222 to extend into, when the plug 22 moves upwardly, so that the upper part of the plug 22 (i.e. the tapered surface 221 shown in the figure) can be fully matched with the through hole (i.e. the tapered hole 2122 shown in the figure) in a form of surface contact, and the lower end of the filter cartridge 10 can be kept in a good closed state, avoiding obvious air and gas leakage.

[0035] The through hole is a tapered hole 2122, with the narrow end of the tapered hole 2122 facing upwardly. Correspondingly, a tapered surface 221 is formed on the upper part of the plug 22, with the large-diameter end of the tapered surface 221 facing downwardly.

[0036] The axial extension length of the conical surface 221 is greater than the axial extension length of the conical hole 2122. When the conical surface 221 fully extends into the conical hole 2122, the lower middle part of the conical surface 221 can contact the hole wall of the conical hole 2122, forming a matching surface contact relationship, thus sealing the conical hole 2122. A sealing ring is fixedly provided at the lower middle part of the conical surface 221.

[0037] The top surface of the plug 22 is formed as an upwardly protruding spherical surface 2211, which can promote the sewage falling on the top surface of the plug 22 to flow down the plug 22 quickly and prevent sedimentation.

[0038] like Figures 1 to 5 As shown, the transmission unit includes a housing 231, an end cap 232 disposed at the lower end of the housing 231, a core rod 233 disposed inside the housing 231, an electromagnet part 235 fixed to the upper part of the housing 231, a permanent magnet part 236 fixed to the upper end of the core rod 233, and a second spring 238.

[0039] The core rod 233 can move vertically relative to the housing 231. The upper part of the housing 231 extends into the countersunk hole 214 and is fixedly connected to the seat body 21, thereby fixing the drive mechanism 23 to the seat body 21. The upper part of the core rod 233 extends into the housing 231, and the lower part protrudes through the end cap 232 and is fixedly connected to the end plate 2221 by a stud 234. When the core rod 233 moves vertically relative to the housing 231, it can push and pull the plug 22 to move up and down relative to the seat body 21, causing the conical surface 221 on the plug 22 to insert into and exit the conical hole 2122, thereby controlling the blocking and opening states of the conical hole 2122. A radial flange 2333 is formed in the middle of the core rod 233. The second spring 238 is sleeved on the core rod 233 and is positioned relative to the lower half of the section of the core rod 233 located inside the housing 231. At this time, both ends of the second spring 238 can contact the lower end face of the radial flange 2333 and the inner bottom surface of the end cap 232, respectively.

[0040] like Figure 1 As shown, in order to keep the tapered hole 2122 in the conductive state, the electromagnet part 235 needs to be kept in the energized state. At this time, the electromagnet part 235 can apply a force to the permanent magnet part 236 (that is, a repulsive magnetic thrust can be generated between the opposing surfaces of the electromagnet part 235 and the permanent magnet part 236), which is sufficient to cause the core rod 233 to move downward relative to the housing 231 by a certain stroke, during which the second spring 238 is further compressed and shortened.

[0041] As Figure 4 shown, in order to keep the tapered hole 2122 in the plugged state, the electromagnet part 235 needs to be kept in the power-off state. At this time, the magnetic repulsion force between the opposite faces of the electromagnet part 235 and the permanent magnet part 236 disappears and the stretching elastic force of the second spring 238 is enough to push the core rod 233 to move upward relative to the shell 231 by a stroke amount, during which the second spring 238 gradually recovers to the original / initial compressed state and stretches longer.

[0042] The end cap 232 and the lower part of the shell 231 are matched by the threaded structure, so that the height position of the end cap 232 relative to the shell 231 can be lifted. An axial flange 2321 is formed on the inner bottom surface of the end cap 232, and an annular groove is formed on the upper end surface of the axial flange 2321, which can insert the lower end of the second spring 238.

[0043] For easy assembly, the shell 231 includes a cylinder one 2311 and a cylinder two 2312 connected by a threaded structure, the cylinder one 2311 is fixedly arranged on the upper part of the cylinder two 2312, and the inner diameter of the cylinder one 2311 is larger than that of the cylinder two 2312. The electromagnet part 235 is fixed on the upper end of the cylinder one 2311, and the cylinder one 2311 is inserted into the counterbore 214. A radial flange is formed on the lower part of the cylinder one 2311, and the radial flange is fixed on the seat body 21 by bolts, so that the shell 231 and the seat body 21 are fixed together.

[0044] The end cap 232 is connected with the lower end of the cylinder two 2312, and the axial flange 2321 can extend into the lower part of the cylinder cavity of the cylinder two 2312 and match with the lower end of the second spring 238.

[0045] A rubber ring 239 is sleeved on the outer threaded surface at the lower end of the cylinder two 2312, and a shoulder is formed at the root of the outer threaded surface to block the upward movement of the rubber ring 239. When the end cap 232 is screwed on the outer threaded surface, the upper end surface of the end cap 232 can extrude the rubber ring 239, so that the rubber ring 239 is clamped between the end cap 232 and the shoulder.

[0046] The core rod 233 includes a rod part one 2331 and a rod part two 2332 connected by a threaded structure, the rod part one 2331 is fixedly arranged on the upper part of the rod part two 2332, and the outer diameter of the rod part one 2331 is larger than that of the rod part two 2332. The radial flange 2333 is formed on the upper end of the rod part two 2322 and consistent with the inner diameter of the cylinder two 2312, so that the core rod 233 can be guided to move vertically relative to the shell 231.

[0047] A first spring 237 is sleeved on the rod part 2331, and the upper and lower ends of the first spring 237 are respectively in contact with the lower end surface of a rim seat bearing the permanent magnet part 236 and the inner bottom surface of the cylinder part 2311. Specifically, the lower end of the first spring 237 is in contact with the inner bottom surface of the cylinder part 2311, and the upper end of the first spring 237 can be switched between the state of being in contact with the rim seat and the state of being separated from the rim seat. The outer diameter of the rim seat is not greater than the inner diameter of the cylinder part 2311, and preferably the sizes of the rim seat and the cylinder part 2311 are the same, which can better promote the core rod 233 to move along the vertical direction relative to the shell 231.

[0048] After the first spring 237 is arranged, when the magnetic thrust acting on the permanent magnet part 236 promotes the core rod 233 to suddenly move downward relative to the shell 231 at the moment of energization of the electromagnet part 235, the first spring 237 can be in contact with the rim seat, thereby playing a buffering role and preventing the associated structures between the core rod 233 and the shell 231 from being strongly impacted.

[0049] The above embodiments only exemplarily illustrate the principles and effects of the present application, and are not used to limit the present application. The present application can be improved in many aspects without departing from the general idea, and those skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present application. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical idea of the present application should be covered by the claims of the present application.

Claims

1. A filter cartridge base for use in the dedusting of a furnace kiln exhaust, characterised in that: The seat body (21) is fixedly connected with the lower end of the filter cartridge (10); a through hole is formed in the central area of the upper end face (212) of the seat body (21), an annular inclined surface (2121) is formed around the through hole, and the outer ring of the annular inclined surface (2121) is higher than the inner ring; a type groove (213) is formed on the seat body (21) and corresponds to the lower end of the through hole; a plurality of counterbores (214) corresponding to the driving mechanisms (23) are formed around the type groove (213); The upper part of the plug block (22) can be matched with the through hole in the form of profile contact; a plurality of connecting arms (222) corresponding to the driving mechanisms (23) are formed on the lower part of the plug block (22); the connecting arms (222) extend downwardly and the lower ends are provided with end plates (2221); the upper part of the driving mechanism (23) is fixed in the counterbores (214), the lower part is fixedly connected with the end plates (2221), and the plug block (22) can be switched to be inserted into the through hole and moved out of the through hole by the extension and retraction of the transmission unit. The through hole is a tapered hole (2122) with the tapered hole (2122) opening upward; correspondingly, a tapered surface (221) is formed on the upper part of the plug block (22) with the large-diameter end of the tapered surface (221) facing downward; the axial extension length of the tapered surface (221) is greater than the axial extension length of the tapered hole (2122).

2. The filter cartridge base for kiln off-gas dedusting according to claim 1, characterized in that: The top surface of the plug block (22) is formed as a convex spherical surface (2211).

3. The filter cartridge base for use in dust removal of a kiln exhaust according to claim 2, characterized in that: The transmission unit includes a shell (231), an end cap (232) arranged at the lower end of the shell (231), a core rod (233) capable of moving vertically relative to the shell (231), an electromagnet part (235) fixed on the upper part of the shell (231), a permanent magnet part (236) fixed on the upper end of the core rod (233), and a second spring (238); the upper part of the shell (231) extends into the counterbores (214) and is fixedly connected with the seat body (21); the upper part of the core rod (233) extends into the shell (231), the lower part penetrates through the end cap (232) and is connected with the end plates (2221); a radial flange (2333) is formed on the middle part of the core rod (233), and the second spring (238) is sleeved on the core rod (233) and contacts the radial flange (2333) and the end cap (232) at both ends; 4. The filter cartridge base for use in dust removal of a furnace exhaust according to claim 1, characterized in that: When the electromagnet part (235) is energized, it can exert a force on the permanent magnet part (236), so as to promote the core rod (233) to move downward relative to the shell (231) and compress the second spring (238); when the electromagnet part (235) is de-energized, the second spring (238) can push the core rod (233) to move upward relative to the shell (231). ​ 5. The filter cartridge base for use in dust removal of a kiln exhaust according to claim 4, characterized in that: The end cap (232) is matched with the lower part of the shell (231) through a threaded structure, so that the end cap (232) can be lifted and moved; an axial flange (2321) is formed on the inner bottom surface of the end cap (232), and an annular groove is formed on the upper end surface of the axial flange (2321), which can be inserted into the lower end of the second spring (238).

6. The filter cartridge base for use in dust removal of a furnace exhaust according to claim 1, characterized in that: An annular flange (211) extending in the vertical direction is formed on the upper part of the seat body (21), and an annular groove (2111) is formed on the upper end surface of the annular flange (211); the lower end of the filter cartridge (10) is inserted into the annular groove (2111), and is connected together with the seat body (21).

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