CN114434711A - Production process of ultralow-emission needle-punched filter bag for cement kiln tail - Google Patents

Production process of ultralow-emission needle-punched filter bag for cement kiln tail Download PDF

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Publication number
CN114434711A
CN114434711A CN202210124051.XA CN202210124051A CN114434711A CN 114434711 A CN114434711 A CN 114434711A CN 202210124051 A CN202210124051 A CN 202210124051A CN 114434711 A CN114434711 A CN 114434711A
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China
Prior art keywords
temperature
heating
heating roller
hot
fiber
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CN202210124051.XA
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Chinese (zh)
Inventor
王道龙
顾寒彬
王超颖
丁海迁
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Zhejiang Heading Environment Technology Co ltd
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Zhejiang Heading Environment Technology Co ltd
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Priority to CN202210124051.XA priority Critical patent/CN114434711A/en
Publication of CN114434711A publication Critical patent/CN114434711A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/24—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of indefinite length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/38—Moulds, cores or other substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
    • B29C41/34—Component parts, details or accessories; Auxiliary operations
    • B29C41/42—Removing articles from moulds, cores or other substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
    • D04H1/43835—Mixed fibres, e.g. at least two chemically different fibres or fibre blends
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C7/00—Heating or cooling textile fabrics
    • D06C7/02—Setting
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06C—FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS
    • D06C9/00—Singeing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/14—Mixture of at least two fibres made of different materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

The invention discloses a production process of an ultralow-discharge needled filter bag for a cement kiln tail, and aims to provide a production process of an ultralow-discharge needled filter bag for a cement kiln tail, which adopts polyaryl oxadiazole fibers-Baodelan and P84 fibers, forms a good film covering effect by controlling the film covering temperature, realizes a good surface filtering effect, and further realizes an ultralow-discharge effect.

Description

Production process of ultralow-emission needle-punched filter bag for cement kiln tail
Technical Field
The invention relates to the technical field of processing of a needle-punched filter bag, in particular to a production process of an ultra-low discharge needle-punched filter bag for a cement kiln tail.
Background
At present, "bag-type dust removal" or "static + bag-type dust removal" is generally adopted in the market as a main means of ultralow emission, wherein an industrial dust filter bag produced by a film covering technology or an ultrafine fiber technology is a key component for realizing ultralow emission of bag-type dust removal. The performance of the filter bag for ultra-low emission of industrial smoke dust obviously affects the emission effect of enterprises such as coal-fired power plants, refuse incineration plants, steel smelting plants, cement plants and the like.
At present, when to the tectorial membrane in the traditional processing technology to cement kiln tail with acupuncture filter bag, to the control of temperature during the heating, need be to the temperature control with the heating in certain scope, can laminate stably when just can ensure the tectorial membrane, firm degree is high, just can realize good surface filter effect, reaches ultralow emission effect.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the production process of the ultra-low discharge needle filter bag for the cement kiln tail, which adopts the polyaryloxadiazole fiber, the Baodelon and the P84 fiber, forms a good film covering effect by controlling the film covering temperature, realizes a good surface filtering effect and further realizes an ultra-low discharge effect.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of an ultralow-emission needle filter bag for a cement kiln tail comprises the following steps of S1, fiber proportioning and mixing: selecting polyaryloxadiazole fiber-Baodelon and P84 fiber, wherein the mixing ratio of the polyaryloxadiazole fiber-Baodelon and the P84 fiber is 1: 1;
s2, opening: feeding the mixed polyaryloxadiazole fiber-polyester and P84 fiber to a card wire opener through a conveying flat curtain in sequence, wherein the rotational speed of a card wire beater is 300r/min, opening freely, and collecting separately;
s3, carding and lapping: the net outlet speed of the carding machine is 20m/min, the polyaryl oxadiazole fiber-polyester fiber and P84 fiber mixed fiber net made by the carding machine is used for standby, the mixed fiber net is laid on the surface of the reinforced base fabric, the net laying speed is 4m/min, and the laid fiber net is fed into a needling area by a net feeding mechanism;
s4, needling: feeding the combined net formed by the mixed fiber net and the reinforcing base fabric into a needling area of a needling machine, needling the net layers along the thickness direction, needling the fiber net which is high in fluffiness and has no strength, wherein the needling depth is 5mm, the needling density is 450 needles/cm, and the discharging speed is 20 m/min;
s5, singeing: singeing the material subjected to needling treatment to remove burrs and hair balls of the material;
s6, shaping: carrying out high-temperature hot-pressing shaping on the singed needled felt by a hot press, wherein the temperature is between 150 and 200 ℃, and the hot-pressing time is between 5 and 10 min;
s7, gluing: gluing the shaped needled felt by a gluing machine, wherein the thickness of the glued glue is between 5 and 8 mu m;
s8, hot rolling and film covering: hot-pressing the PTFE film and the glued needled felt substrate by a hot-pressing film covering machine, controlling the temperature of a heating roller to be 350-450 ℃, controlling the pressure to be 500N, and controlling the rotating speed of the heating roller to be 50 r/min;
s9, cooling and rolling: and rolling the material with the surface coated with the glue by a rolling roller filled with cooling liquid.
The invention is further configured to: the hot pressing laminating machine comprises a frame and a hot pressing mechanism arranged on the frame and used for hot pressing the materials after the PTFE film and the glue are laminated, the hot pressing mechanism comprises a heating roller and a pressing roller which are arranged in parallel, the frame is also provided with a conveying roller which is arranged at the upper side and the lower side of the hot pressing mechanism and used for supplying the PTFE film to the hot pressing mechanism and a feeding roller used for outputting the materials after needling, and the PTFE film output by the conveying roller is in line contact hot pressing lamination with the roller surface of the heating roller.
The invention is further configured to: the hot pressing mechanism further comprises a temperature control mechanism arranged in the heating roller, the temperature control mechanism comprises an installation cavity arranged in the heating roller, a plurality of heating long plates arranged in the installation cavity, a temperature detector arranged on the outer wall of the heating roller and used for detecting the temperature of the outer wall of the heating roller, a controller used for driving the heating long plates to heat, and a driving structure arranged in the installation cavity and used for controlling the heating long plates to be close to or far away from the outer wall of the heating roller according to the temperature.
The invention is further configured to: the drive structure is including setting up in the mounting bracket of installation intracavity, setting up the through-hole on heating long board, running through the through-hole and set up the guide arm on the mounting bracket, set up in the connecting axle of heating long board length direction both sides, set up in the worm wheel of connecting axle, set up on the mounting bracket and the worm that is connected with worm wheel transmission, be used for driving the rotatory motor of worm and set up between mounting bracket and heating long board and the cover locate the outer reset spring of guide arm.
The invention is further configured to: the driving structure further comprises a control structure for starting and stopping the motor, the control structure comprises a thermistor arranged on the inner wall of the heating roller, an on-off switch connected with the thermistor in parallel, a power supply electrically connected with the thermistor and the on-off switch, an electromagnet arranged electrically connected with the power supply, a permanent magnet arranged opposite to the electromagnet, a conductor connected with the permanent magnet through a connecting rod, and a driving circuit of the same circuit with the conductor, the driving circuit is used for controlling the driving motor to start and stop, and the magnetic force of the electromagnet controls the on-off driving circuit of the conductor.
The invention is further configured to: the heating roller comprises a medium filling cavity arranged on the outer side of the mounting cavity, the medium filled in the medium filling cavity is metal or sand, and if the medium is filled with metal, the filler is copper or lead.
The invention is further configured to: the controller comprises a temperature receiving unit for receiving the temperature detected by the temperature detector; a comparing unit for setting a limit temperature value of the heating roller and comparing the detected temperature with the limit temperature value; the starting unit is used for controlling the on and off of the on-off switch, the temperature control mechanism comprises the following specific temperature control steps that S80, the heating long plate is in an initial state when being attached to the outer wall of the medium filling cavity, the starting unit controls the on-off switch to be in an on state, the electromagnet has strong magnetism and is attracted with the permanent magnet, and the surface temperature of the heating roller is continuously increased under the heating of the heating long plate;
s81, when the temperature of the heating roller exceeds the set value K1, the starting unit controls the on-off switch to be in an off state, at the moment, because the thermistor is at high temperature, the resistance of the thermistor is continuously increased, and the magnetism of the electromagnet is continuously weakened;
s82, when the permanent magnet loses the attraction, the electric conductor loses the constraint and then the drive circuit is conducted, the drive circuit is conducted and then the drive motor works, the worm rotates, and the heating long plate gradually leaves away from the medium filling cavity under the rotation of the worm;
s83, when the heating long plate is gradually far away from the surface of the medium filling cavity, the temperature of the heating roller is gradually reduced, and the temperature detector detects the surface temperature of the heating roller in real time;
s84, until the surface temperature of the heating roller reaches a K0 value, the starting unit controls the on-off switch to be in an on-state, the electromagnet is electrified to generate suction force on the permanent magnet, the electric conductor is separated from the driving circuit, the motor stops working, the heating long plate is reset under the action of the reset spring and is attached to the surface of the medium filling cavity;
s85, repeating the steps S80-S84.
The invention is further configured to: when the temperature detector detects the surface temperature of the heating roller at K0 and K1, the next operation is performed.
By adopting the technical scheme, the method has the beneficial effects that 1, the domestic polyaryloxadiazole fiber-Baodelon and P84 blending net forming and needling reinforcement process technology is adopted to construct a multi-element hybrid structure, and the properties of two fibers are relied on, and then the two fibers are blended to form a net so as to meet the performance requirements of high temperature resistance, flame retardance, acid resistance and the like and adapt to the complex filtering working condition of the cement kiln tail;
2. the hot pressing mechanism is arranged to further comprise a temperature control mechanism arranged in the heating roller, so that a good laminating effect on materials is realized when a film is coated, the temperature is controlled in a proper range, the temperature control mechanism is further arranged to comprise an installation cavity arranged in the heating roller, a plurality of heating long plates arranged in the installation cavity, a temperature detector arranged on the outer wall of the heating roller and used for detecting the temperature of the outer wall of the heating roller, a controller used for driving the heating long plates to be heated, and a driving structure arranged in the installation cavity and used for controlling the heating long plates to be close to or far away from the outer wall of the heating roller according to the temperature, the surface temperature of the heating roller is detected through the temperature detector, the temperature is used as a standard for moving the heating long plates, the heating long plates are directly far away from the medium filling cavity, the temperature control is realized, and the temperature regulation is rapid, the practicability is strong;
3. the driving structure is further arranged to comprise an installation frame arranged in the installation cavity, a through hole arranged on the heating long plate, a guide rod penetrating through the through hole and arranged on the installation frame, connecting shafts arranged on two sides of the heating long plate in the length direction, worm wheels arranged on the connecting shafts, a worm arranged on the installation frame and in transmission connection with the worm wheels, a motor used for driving the worm to rotate, and a reset spring arranged between the installation frame and the heating long plate and sleeved outside the guide rod, and by adopting the structure, the motor drives the worm to rotate through the matching between the worm and the worm wheels, so that the heating long plate is close to or far away from the medium filling cavity;
4. the driving structure further comprises a control structure for starting and stopping the motor, the control structure comprises a thermistor arranged on the inner wall of the heating roller, an on-off switch connected with the thermistor in parallel, a power supply electrically connected with the thermistor and the on-off switch, an electromagnet electrically connected with the power supply, a permanent magnet arranged opposite to the electromagnet, a conductor connected with the permanent magnet through a connecting rod, and a driving circuit of the same circuit with the conductor The drive circuit is disconnected, the start and stop of the drive circuit are controlled through the electromagnet circuit, a good control effect is formed, the practicability is high, and the structure is simple.
Drawings
FIG. 1 is a schematic structural diagram of a hot-pressing mechanism in an embodiment of a production process of an ultra-low discharge needle-punched filter bag for a cement kiln tail according to the present invention.
FIG. 2 is a schematic structural diagram of a temperature control mechanism in an embodiment of a production process of an ultra-low discharge needle filter bag for a cement kiln tail according to the present invention.
FIG. 3 is a schematic diagram of a control circuit structure of an embodiment of a production process of an ultra-low discharge needle-punched filter bag for a cement kiln tail according to the present invention.
Reference numeral, 1, a frame; 10. a heating roller; 11. a compression roller; 12. a conveying roller; 13. a feed roll; 20. a mounting cavity; 21. heating the long plate; 22. a temperature detector; 23. a controller; 30. a mounting frame; 31. a through hole; 32. a guide bar; 33. a connecting shaft; 34. a worm gear; 35. a worm; 36. a motor; 37. a return spring; 40. a thermistor; 41. an on-off switch; 42. a power source; 43. an electromagnet; 44. a permanent magnet; 45. an electrical conductor; 46. a drive circuit; 5. the medium fills the cavity.
Detailed Description
The embodiment of the production process of the ultra-low discharge needle filter bag for the cement kiln tail of the invention is further explained by referring to fig. 1 to fig. 3.
Spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used in the embodiments for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
Moreover, relational terms such as "first" and "second," and the like, may be used solely to distinguish one element from another element having the same name, without necessarily requiring or implying any actual such relationship or order between such elements.
The production process of the ultra-low discharge needle filter bag for the cement kiln tail adopts polyaryl oxadiazole fiber-Baodelon and P84 fiber, forms a good film covering effect by controlling the film covering temperature, realizes a good surface filtering effect and further realizes an ultra-low discharge effect.
In order to achieve the purpose, the invention provides the following technical scheme: a production process of an ultralow-emission needle filter bag for a cement kiln tail comprises the following steps of S1, fiber proportioning and mixing: selecting polyaryloxadiazole fiber-Baodelon and P84 fiber, wherein the mixing ratio of the polyaryloxadiazole fiber-Baodelon and the P84 fiber is 1: 1;
s2, opening: feeding the mixed polyaryloxadiazole fiber-polyester and P84 fiber to a card wire opener through a conveying flat curtain in sequence, wherein the rotational speed of a card wire beater is 300r/min, opening freely, and collecting separately;
s3, carding and lapping: the net outlet speed of the carding machine is 20m/min, the polyaryl oxadiazole fiber-polyester fiber and P84 fiber mixed fiber net made by the carding machine is used for standby, the mixed fiber net is laid on the surface of the reinforced base fabric, the net laying speed is 4m/min, and the laid fiber net is fed into a needling area by a net feeding mechanism;
s4, needling: feeding the combined net formed by the mixed fiber net and the reinforcing base fabric into a needling area of a needling machine, needling the net layers along the thickness direction, needling the fiber net which is high in fluffiness and has no strength, wherein the needling depth is 5mm, the needling density is 450 needles/cm, and the discharging speed is 20 m/min;
s5, singeing: singeing the material subjected to needling treatment to remove burrs and hair balls of the material;
s6, shaping: carrying out high-temperature hot-pressing shaping on the singed needled felt by a hot press, wherein the temperature is between 150 and 200 ℃, and the hot-pressing time is between 5 and 10 min;
s7, gluing: gluing the shaped needled felt by a gluing machine, wherein the thickness of the glued glue is between 5 and 8 mu m;
s8, hot-rolling coating: hot-pressing the PTFE film and the glued needled felt substrate by a hot-pressing film covering machine, controlling the temperature of the heating roller 10 to be 350-450 ℃, controlling the pressure to be 500N, and controlling the rotating speed of the heating roller 10 to be 50 r/min;
s9, cooling and rolling: the material with the surface coated with the glue is wound by a winding roller filled with cooling liquid,
the invention adopts the technique of blending netting and needling reinforcement of domestic polyaryl oxadiazole fiber-Baodelon and P84 to construct a multi-element hybrid structure, depends on the characteristics of two fibers, and then mixes the fibers into a net to meet the performance requirements of high temperature resistance, flame retardance, acid resistance and the like, adapts to the complex filtering working condition of the cement kiln tail, and realizes good laminating effect on a PTFE film through the working procedures of hot rolling and laminating after gluing, and has strong stability and strong practicability.
The hot-pressing laminating machine further comprises a rack 1 and a hot-pressing mechanism which is arranged on the rack 1 and used for hot-pressing and compounding the PTFE film and the materials after being coated with glue, wherein the hot-pressing mechanism comprises a heating roller 10 and a pressing roller 11 which are arranged in parallel correspondingly, the rack 1 is also provided with a conveying roller 12 which is arranged at the upper side and the lower side of the hot-pressing mechanism and used for supplying the PTFE film to the hot-pressing mechanism and a feeding roller 13 used for outputting the materials after being needled, and the PTFE film output by the conveying roller 12 and the roller surface of the heating roller 10 are in line contact hot-pressing and compounding.
The invention is further arranged in that the hot-press mechanism also comprises a temperature control mechanism arranged in the heating roller 10, the temperature control mechanism comprises an installation cavity 20 arranged in the heating roller 10, a plurality of heating long plates 21 arranged in the installation cavity 20, a temperature detector 22 arranged on the outer wall of the heating roller 10 and used for detecting the temperature of the outer wall of the heating roller 10, a controller 23 used for driving the heating long plates 21 to heat, a driving structure arranged in the installation cavity 20 and used for controlling the heating long plates 21 to be close to or far away from the outer wall of the heating roller 10 according to the temperature, the hot-press mechanism is also arranged in the heating roller 10, so that a good laminating effect is formed on materials during film laminating, the temperature is controlled in a proper range, and the temperature control mechanism is further arranged to comprise the installation cavity 20 arranged in the heating roller 10 and a plurality of heating long plates 21 arranged in the installation cavity 20, The temperature control device comprises a temperature detector 22 arranged on the outer wall of the heating roller 10 and used for detecting the temperature of the outer wall of the heating roller 10, a controller 23 used for driving the heating long plate 21 to heat, and a driving structure arranged in the installation cavity 20 and used for controlling the heating long plate 21 to be close to or far away from the outer wall of the heating roller 10 according to the temperature, and the temperature detector 22 is used for detecting the surface temperature of the heating roller 10, the temperature is used as the standard for moving the position of the heating long plate 21, and the heating long plate 21 is directly far away from the medium filling cavity 5, so that the temperature control is realized, the temperature control is fast, and the practicability is high.
The invention is further arranged that the driving structure comprises an installation frame 30 arranged in the installation cavity 20, a through hole 31 arranged on the long heating plate 21, a guide rod 32 penetrating through the through hole 31 and arranged on the installation frame 30, a connecting shaft 33 arranged on two sides of the long heating plate 21 in the length direction, a worm wheel 34 arranged on the connecting shaft 33, a worm 35 arranged on the installation frame 30 and in transmission connection with the worm wheel 34, a motor 36 for driving the worm 35 to rotate, and a return spring 37 arranged between the installation frame 30 and the long heating plate 21 and sleeved outside the guide rod 32, and further the driving structure comprises the installation frame 30 arranged in the installation cavity 20, the through hole 31 arranged on the long heating plate 21, the guide rod 32 penetrating through the through hole 31 and arranged on the installation frame 30, the connecting shaft 33 arranged on two sides of the long heating plate 21 in the length direction, the worm wheel 34 arranged on the connecting shaft 33, a first guide rod and a second guide rod, Set up on mounting bracket 30 and worm 35 of being connected with worm wheel 34 transmission, be used for driving the rotatory motor 36 of worm 35 and set up between mounting bracket 30 and heating long board 21 and the cover locate the outer reset spring 37 of guide arm 32, adopt the above-mentioned structural setting, through the cooperation between worm 35 and the worm wheel 34, motor 36 drive worm 35 is rotatory for heating long board 21 is close to or keeps away from medium filling cavity 5, drive simple structure, therefore, the clothes hanger is strong in practicability, be convenient for form good control effect.
The invention is further arranged that the driving structure also comprises a control structure for starting and stopping the motor 36, the control structure comprises a thermistor 40 arranged on the inner wall of the heating roller 10, an on-off switch 41 connected with the thermistor 40 in parallel, a power supply 42 electrically connected with the thermistor 40 and the on-off switch 41, an electromagnet 43 electrically connected with the power supply 42, a permanent magnet 44 arranged opposite to the electromagnet 43, a conductor 45 connected with the permanent magnet 44 through a connecting rod, and a driving circuit 46 with the same circuit as the conductor 45, the driving circuit 46 is used for controlling the starting and stopping of the driving motor 36, the magnetic force of the electromagnet 43 controls the on-off of the conductor 45, and the driving structure further comprises a control structure for starting and stopping the motor 36, the control structure comprises the thermistor 40 arranged on the inner wall of the heating roller 10, the electromagnet 45, The on-off switch 41 connected with the thermistor 40 in parallel, the power supply 42 connected with the thermistor 40 and the on-off switch 41 electrically, the electromagnet 43 arranged on the power supply 42 electrically, the permanent magnet 44 arranged opposite to the electromagnet 43, the conductor 45 connected with the permanent magnet 44 through the connecting rod and the driving circuit 46 of the same circuit with the conductor 45, by adopting the above structure arrangement, the thermistor 40 and the on-off switch 41 are arranged in parallel, the on-off switch 41 is controlled to be on and off by the controller 23, the thermistor 40 can gradually change the current of the circuit of the electromagnet 43 so as to change the magnetic force of the electromagnet 43, the driving circuit 46 is used for controlling the driving motor 36 to start and stop, the magnetic force of the electromagnet 43 controls the conductor 45 to be on and off the driving circuit 46, and the on-off of the driving circuit 46 is controlled by the circuit of the electromagnet 43, the driving circuit 46 is used as a necessary condition for driving the driving motor 36, so that when the surface temperature of the heating roller 10 reaches a set value and the circuit where the electromagnet 43 is located starts to intervene, the controller 23 controls the on-off switch 41 to be on or off, the resistance of the thermistor 40 is gradually increased, the magnetism of the electromagnet 43 is gradually weakened, a heating buffer effect is achieved, the temperature of the heating roller 10 is controlled within an appropriate range, a good film coating effect is achieved, and the heating roller is strong in practicability and simple in structure.
It should be noted that, in the embodiment of the present invention, the arrangement manner of the permanent magnet and the electric conductor is as shown in fig. 3, which belongs to the conventional technical means, and it is necessary to form a support for the permanent magnet and the electric conductor, and have the capability of directional movement, and ensure stability.
The heating roller 10 further comprises a medium filling cavity 5 arranged outside the installation cavity 20, the medium filled in the medium filling cavity 5 is metal or sand, if the metal filling is adopted, the filler is copper or lead, the medium filling cavity 5 is filled by adopting the medium, and because the specific heat of the metal or the sand is relatively small, the temperature rising block can quickly reduce the temperature when a heat source is far away, the heating temperature range is large, the heating temperature can adapt to the heating temperature during film covering, and the practicability is high.
The present invention is further configured such that the controller 23 includes a temperature receiving unit for receiving the temperature detected by the temperature detector 22; a comparison unit for setting a limit temperature value of the heating roller 10 and comparing the detected temperature with the limit temperature value; a starting unit for controlling the on/off of the on/off switch 41, wherein the temperature control of the temperature control mechanism comprises the following specific temperature control steps that S80, the heating long plate 21 is in an initial state attached to the outer wall of the medium filling cavity 5, the starting unit controls the on/off switch 41 to be in an on state, the electromagnet 43 has stronger magnetism and is attracted to the permanent magnet 44, and the surface temperature of the heating roller 10 is continuously increased under the heating of the heating long plate 21;
s81, when the temperature of the heating roller 10 exceeds the set value K1, the starting unit controls the on-off switch 41 to be in an off state, at the moment, because the thermistor 40 is at a high temperature, the resistance of the thermistor 40 is continuously increased, and the magnetism of the electromagnet 43 is continuously weakened;
s82, when the permanent magnet 44 loses suction force, the conductor 45 loses constraint, the drive circuit 46 is conducted, the drive motor 36 works after the drive circuit 46 is conducted, the worm 35 rotates, and the heating long plate 21 gradually gets away from the medium filling cavity 5 under the rotation of the worm 35;
s83, when the heating long plate 21 is gradually far away from the surface of the medium filling cavity 5, the temperature of the heating roller 10 is gradually reduced, and the temperature detector 22 detects the surface temperature of the heating roller 10 in real time;
s84, until the surface temperature of the heating roller 10 reaches a K0 value, the starting unit controls the on-off switch 41 to be in a closed state, the electromagnet 43 is electrified to generate attraction force on the permanent magnet, the conductor 45 is separated from the driving circuit 46, the motor 36 stops working, the heating long plate 21 is reset under the action of the reset spring 37 and is attached to the surface of the medium filling cavity 5;
s85, repeating the steps S80-S84.
The present invention is further configured such that when the temperature detector 22 detects that the surface temperature of the heating roller 10 is at K0, K1, the next operation is performed.
In the embodiment of the present invention, the surface temperature of the heating roller 10 is detected in real time by the temperature detector 22 on the outer surface of the heating roller 10 through the combined control of the driving circuit 46 and the control circuit of the electromagnet 43, when the temperature detected by the temperature detector 22 reaches a set value, the on-off switch 41 needs to be closed by the controller 23, the current passes through the thermistor 40 to form a path, and because the thermistor 40 adopts the positive temperature coefficient thermistor 40, the resistance is increased correspondingly with the increase of the temperature, at this time, the current of the control circuit of the electromagnet 43 is gradually reduced, the magnetism of the electromagnet 43 is also correspondingly reduced, the permanent magnet loses the magnetic attraction, the permanent magnet is gradually separated from the electromagnet 43, the conductor 45 enters the driving circuit 46, the driving circuit 46 forms a path, at this time, the motor 36 operates after a point, the worm 35 is rotated to drive the worm wheel 34, at this time, the heating long plate 21 is gradually far away from the medium filling cavity 5, the temperature of the medium filling cavity 5 is also gradually reduced, and the heating temperature is maintained at a proper value;
next, when the heating long plate 21 is away from the heating roller 10 for a predetermined time, the surface temperature of the heating roller 10 gradually decreases, the temperature detector 22 detects that the temperature gradually decreases, and when the temperature reaches the set temperature, the controller 23 controls the on-off switch 41 to be adjusted to the on state, the current passed by the electromagnet 43 increases, the magnetism of the electromagnet 43 increases, the electromagnet 43 generates a magnetic force to the permanent magnet, the electric conductor 45 is released from the drive circuit 46, the motor 36 loses power, the heating long plate 21 is returned by the return spring 37, and the medium filling chamber 5 is heated again, thereby performing repeated heating operations.
In the embodiment of the invention, because the traditional heating mode is to control the temperature of the heat source, the temperature control mode can not reach the proper film coating temperature, and the temperature is too high due to the fact that the temperature control is not timely enough, so that potential safety hazards exist, when the temperature is too low, the film coating is not in place enough due to the fact that the temperature needs to be reheated, and the whole effect is influenced;
it should be noted that, in the embodiment of the present invention, the optimum temperature of the coating film is 350 ℃ to 450 ℃, therefore, when the temperature detector 22 detects that the surface temperature of the heating roller 10 is K0 and K1, the next operation is performed, where the value of K0 is required to be greater than 350 ℃, the value of K1 is required to be less than 450 ℃, and the heating distance of the long heating plate 21 is controlled by the dual circuit, so as to form a heating buffer space, thereby achieving a good temperature control effect, with strong practicability and simple structure.
The above description is only a preferred embodiment of the present invention and should not be construed as limiting the present invention, and those skilled in the art should be able to make general changes and substitutions within the technical scope of the present invention.

Claims (8)

1. A production process of an ultralow-emission needle filter bag for a cement kiln tail is characterized by comprising the following steps of S1, fiber proportioning and mixing: selecting polyaryloxadiazole fiber-Baodelon and P84 fiber, wherein the mixing ratio of the polyaryloxadiazole fiber-Baodelon and the P84 fiber is 1: 1;
s2, opening: feeding the mixed polyaryloxadiazole fiber-polyester and P84 fiber to a card wire opener through a conveying flat curtain in sequence, wherein the rotational speed of a card wire beater is 300r/min, opening freely, and collecting separately;
s3, carding and lapping: the net outlet speed of the carding machine is 20m/min, the polyaryl oxadiazole fiber-polyester fiber and P84 fiber mixed fiber net made by the carding machine is used for standby, the mixed fiber net is laid on the surface of the reinforced base fabric, the net laying speed is 4m/min, and the laid fiber net is fed into a needling area by a net feeding mechanism;
s4, needling: feeding the combined net formed by the mixed fiber net and the reinforcing base fabric into a needling area of a needling machine, needling the net layers along the thickness direction, needling the fiber net which is high in fluffiness and has no strength, wherein the needling depth is 5mm, the needling density is 450 needles/cm, and the discharging speed is 20 m/min;
s5, singeing: singeing the material subjected to needling treatment to remove burrs and hair balls of the material;
s6, shaping: carrying out high-temperature hot-pressing shaping on the singed needled felt by a hot press, wherein the temperature is between 150 and 200 ℃, and the hot-pressing time is between 5 and 10 min;
s7, gluing: gluing the shaped needled felt by a gluing machine, wherein the thickness of the glued glue is between 5 and 8 mu m;
s8, hot-rolling coating: hot-pressing the PTFE film and the needled felt base material after being coated with the glue by a hot-pressing film coating machine, controlling the temperature of the heating roller (10) to be 350-450 ℃, the pressure to be 500N, and the rotating speed of the heating roller (10) to be 50 r/min;
s9, cooling and rolling: and rolling the material with the surface coated with the glue by a rolling roller filled with cooling liquid.
2. The production process of the polyester anti-paste bag needled felt according to claim 1, wherein the hot-pressing film laminating machine comprises a frame (1) and a hot-pressing mechanism arranged on the frame (1) and used for hot-pressing and compounding the PTFE film and the glued material, the hot-pressing mechanism comprises a heating roller (10) and a pressing roller (11) which are correspondingly arranged in parallel, the frame (1) is further provided with a conveying roller (12) which is arranged on the upper side and the lower side of the hot-pressing mechanism and used for supplying the PTFE film to the hot-pressing mechanism and a feeding roller (13) used for outputting the needled material, and the PTFE film output by the conveying roller (12) is in line contact with the roller surface of the heating roller (10) for hot-pressing and compounding.
3. The production process of the polyester anti-paste bag needled felt according to claim 2, wherein the hot pressing mechanism further comprises a temperature control mechanism arranged in the heating roller (10), the temperature control mechanism comprises an installation cavity (20) arranged in the heating roller (10), a plurality of heating long plates (21) arranged in the installation cavity (20), a temperature detector (22) arranged on the outer wall of the heating roller (10) and used for detecting the temperature of the outer wall of the heating roller (10), a controller (23) used for driving the heating long plates (21) to heat, and a driving structure arranged in the installation cavity (20) and used for controlling the heating long plates (21) to be close to or far away from the outer wall of the heating roller (10) according to the temperature.
4. The production process of the polyester anti-pasting bag needled felt according to claim 3, wherein the driving structure comprises an installation frame (30) arranged in the installation cavity (20), a through hole (31) arranged on the heating long plate (21), a guide rod (32) penetrating through the through hole (31) and arranged on the installation frame (30), connecting shafts (33) arranged on two sides of the heating long plate (21) in the length direction, worm wheels (34) arranged on the connecting shafts (33), a worm (35) arranged on the installation frame (30) and in transmission connection with the worm wheels (34), a motor (36) for driving the worm (35) to rotate, and a return spring (37) arranged between the installation frame (30) and the heating long plate (21) and sleeved outside the guide rod (32).
5. The production process of the polyester anti-pasting bag needled felt according to claim 4, wherein the driving structure further comprises a control structure for starting and stopping the motor (36), the control structure comprises a thermistor (40) arranged on the inner wall of the heating roller (10), an on-off switch (41) connected with the thermistor (40) in parallel, a power supply (42) electrically connected with the thermistor (40) and the on-off switch (41), an electromagnet (43) electrically connected with the power supply (42), a permanent magnet (44) arranged opposite to the electromagnet (43), a conductor (45) connected with the permanent magnet (44) through a connecting rod, and a driving circuit (46) of the same circuit with the conductor (45), the driving circuit (46) is used for controlling the starting and stopping of the driving motor (36), and the magnetic force of the electromagnet (43) controls the on and off of the conductor (45), The drive circuit (46) is turned off.
6. The production process of the polyester anti-paste bag needled felt according to claim 2, wherein the heating roller (10) comprises a medium filling cavity (5) arranged outside the installation cavity (20), the medium filled in the medium filling cavity (5) is metal or sand, and if metal filling is adopted, the filler is copper or lead.
7. The production process of the polyester anti-paste bag needled felt according to claim 5, wherein the controller (23) comprises a temperature receiving unit for receiving the temperature detected by the temperature detector (22); a comparison unit for setting a limit temperature value of the heating roller (10) and comparing the detected temperature with the limit temperature value; the starting unit is used for controlling the on and off of the on-off switch (41), the temperature control step of the temperature control mechanism is as follows, S80, the outer wall of the medium filling cavity (5) is in an initial state when the long heating plate (21) is attached, the on-off switch (41) is controlled to be in an on state by the starting unit, the electromagnet (43) has strong magnetism and is attracted with the permanent magnet (44), and the surface temperature of the heating roller (10) is continuously increased under the heating of the long heating plate (21);
s81, when the temperature of the heating roller (10) exceeds the set value K1, the starting unit controls the on-off switch (41) to be in an off state, at the moment, because the thermistor (40) is at a high temperature, the resistance of the thermistor (40) is continuously increased, and the magnetism of the electromagnet (43) is continuously weakened;
s82, when the permanent magnet (44) loses suction force, the conductor (45) loses constraint, the drive circuit (46) is conducted, after the drive circuit (46) is conducted, the drive motor (36) works, the worm (35) rotates, and the heating long plate (21) gradually gets away from the medium filling cavity (5) under the rotation of the worm (35);
s83, when the heating long plate (21) is gradually far away from the surface of the medium filling cavity (5), the temperature of the heating roller (10) is gradually reduced, and the temperature detector (22) detects the surface temperature of the heating roller (10) in real time;
s84, until the surface temperature of the heating roller (10) reaches a K0 value, the starting unit controls the on-off switch (41) to be in a closed state, the electromagnet (43) is electrified to generate suction force on the permanent magnet, the conductor (45) breaks away from the driving circuit (46), the motor (36) stops working, the heating long plate (21) is reset under the action of the reset spring (37) and is attached to the surface of the medium filling cavity (5);
s85, repeating the steps S80-S84.
8. The production process of the polyester anti-paste bag needled felt according to claim 7, wherein the next operation is carried out when the temperature detector (22) detects that the surface temperature of the heating roller (10) is K0 and K1.
CN202210124051.XA 2022-02-10 2022-02-10 Production process of ultralow-emission needle-punched filter bag for cement kiln tail Pending CN114434711A (en)

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