CN114311949A

CN114311949A - Production method of antioxidant antistatic needled felt for steel plant

Info

Publication number: CN114311949A
Application number: CN202210046102.1A
Authority: CN
Inventors: 王道龙; 王和平; 王贵珊
Original assignee: Zhejiang Heading Environment Technology Co ltd
Current assignee: Zhejiang Heading Environment Technology Co ltd
Priority date: 2022-01-17
Filing date: 2022-01-17
Publication date: 2022-04-12
Anticipated expiration: 2042-01-17
Also published as: CN114311949B; WO2023134388A1

Abstract

The invention discloses a production method of an anti-oxidation and anti-static needled felt in a steel plant, aiming at providing a production method of a needled felt with good anti-oxidation effect, good anti-static effect and strong practicability of the obtained product, and the technical scheme is characterized in that PPS (polyphenylene sulfide) reinforced base cloth is laid above a pure PPS (polyphenylene sulfide) staple fiber net, a PPS staple fiber layer mixed with conductive fibers is further laid, and under the actual filtering working condition, the staple fiber layer mixed with the conductive fibers is used as a dust-facing surface, so that the conductive performance of the conductive fibers is fully exerted, and the anti-static effect is exerted; the reinforced PPS base cloth layer is formed by crosswise weaving base cloth fibers into rectangular hollowed-out spaces, and a plurality of ring-shaped structures are arranged in the hollowed-out spaces, so that short fibers are conveniently and efficiently entangled and attached in the subsequent needling process, the composite effect of the short fiber layer and the base cloth is effectively improved, the problem of skewness is obviously reduced, the mechanical properties of the needled felt in the warp and weft directions are good, and the dimensional stability is high.

Description

Production method of antioxidant antistatic needled felt for steel plant

Technical Field

The invention relates to the technical field of manufacturing of needled felts, in particular to a production method of an antioxidant and antistatic needled felt in a steel plant.

Background

The nature of the iron and steel smelting dust is related to its source. The furnace smoke dust is solid particles formed by condensation or oxidation of sublimate or steam generated in a physical and chemical process in the metal smelting or heating process in the air, mainly comprises metal oxides, has fine particles and is mostly discharged along with high-temperature smoke through a chimney. The kiln smoke prevention and control is developed into various sets of special dust removal systems according to the process characteristics: blast furnace gas generated by an iron-making blast furnace is generally purified to a dust concentration in a standard state by a scrubber or a wet electric precipitator after gas ash is removed by a gravity settling chamber, and a cloth bag type dust removal system is generally adopted for a steel-making electric furnace and an iron alloy electric furnace. The developed project product has the characteristics of high temperature resistance, static electricity resistance, good oxidation resistance and the like, can be used under the conditions of high temperature, humidity and chemical substances, and can be widely applied to oxidation resistance and static electricity resistance high-temperature flue gas dust removal in a plurality of industries such as steel smelting, coal carbon, chemical industry, petroleum and the like. Has wide market prospect and obvious economic benefit.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the production method of the needled felt, which is good in oxidation resistance effect, good in anti-static effect and strong in practicability, of the obtained product.

In order to achieve the purpose, the invention provides the following technical scheme: a production method of an antioxidant and antistatic needled felt for a steel plant comprises the following steps of S1, fiber proportioning and mixing: selecting PTFE short fibers, conductive fibers and PPS fibers, wherein the mixing ratio of the conductive fibers to the PTFE short fibers is 1: 10;

s2, opening: feeding the mixed conductive fibers, PTFE short fibers, pure PTFE short fibers and PPS fibers to a card wire opener through a conveying flat curtain in sequence, wherein the card wire opener rotates at a speed of 300r/min, and performs free opening and separate collection;

s3, carding and lapping: the net discharging speed of a carding machine is 20m/min, PTFE short fiber and conductive fiber mixed fiber nets made by the carding machine are used for standby, an additional base fabric made of PPS fiber and pure PTFE short fiber nets are made of the pure PTFE short fiber, the pure PTFE short fiber nets and the mixed fiber nets are sequentially laid on the surface of an enhanced base fabric, the net laying speed is 4m/min, and the laid fiber nets are fed into a needle punching area by a net feeding mechanism;

s4, needling: the short fiber layer mixed with the conductive fibers is used as a fluffy fiber net and a reinforcing base fabric of a dust-facing surface and is conveyed into a needling area under the clamping of a feeding curtain, the high fluffy fiber net without strong force is needled, 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, coating latex on the surface: coating PTFE latex on the semi-finished product formed in the step S5 through a latex coating machine;

s7, cooling and shaping: 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: scribble the discharge gate department of milk machine of gluing and be equipped with the ejection of compact structure that is used for controlling the latex load of discharge, ejection of compact structure includes a plurality of discharging channel that are connected with the discharge gate of coating the milk machine of gluing, be connected the buffer chamber with each discharging channel, arrange in the buffer chamber and have the first regulation barrel of first regulation barrel and second regulation barrel, set up the first piston in the first regulation barrel, set up the reset spring in the rodless intracavity of first regulation barrel, set up the second piston in the first regulation barrel, connect gradually the connecting rod of first piston and second piston, set up the reposition of redundant personnel passageway on the buffer chamber inner wall and set up on the connecting rod and plug up the atress piston of reposition of redundant personnel passageway under reset spring non-stressed state.

The invention is further configured to: the discharge structure further comprises a one-way valve arranged in a rodless cavity of the second adjusting cylinder, a first flow channel penetrating through the second piston, a second flow channel arranged on the first piston and penetrating through a piston rod of the first piston, a third flow channel arranged in the connecting rod and sequentially communicated with the first flow channel and the second flow channel, a radial flow channel arranged in the plug body part of the first piston, an axial flow channel penetrating through the plug body part of the first piston on one side of the rod cavity of the first adjusting cylinder, and an outer flow channel arranged on the rod cavity of the first adjusting cylinder.

The invention is further configured to: the radial channel is provided with an installation channel, a connecting spring arranged in the installation channel and a stress block on one side close to the inner wall of the first adjusting cylinder, and the stress block is abutted against the inner wall of the first adjusting cylinder when receiving a force from one side of the radial channel.

The invention is further configured to: scribble the rotatory ejection of compact of motor drive screw rod, and scribble the emulsion machine and include the screw rod chamber that sets gradually along latex flow direction and store the chamber, be equipped with the heater on the outer wall in screw rod chamber, be equipped with between screw rod chamber and the storage chamber and block the net, the import end department of storing the chamber is equipped with flow monitor.

The invention is further configured to: the feed end and the discharge end in screw cavity all are equipped with electromagnetism on-off valve, flow monitor signal has the controller, and this controller is used for opening of control motor, rotational speed and electromagnetism on-off valve's break-make.

The invention is further configured to: the heater is including setting up a plurality of annular heating pipes on the screw rod chamber outer wall and with each heating pipe electric connection's temperature control regulator, temperature control regulator and controller signal connection, the heating pipe comprises inner tube and outer tube, for annotating the vacuum clearance structure that has heating medium between inner tube and the outer tube.

The invention is further configured to: the controller also comprises a current monitor for monitoring the current of the motor; the rotating speed monitor is used for monitoring the rotating speed of the motor, and the specific heating steps are as follows: s1) setting the current value and the rotating speed value of the motor under the standard latex viscosity as I and V, detecting whether the latex is full through a flow monitor after the latex is introduced, setting the output flow as L after the latex is full, detecting the current and the rotating speed of the motor at the moment, and recording the current and the rotating speed as I0 and V0;

s2) detecting whether the screw cavity has caking in the T1 time period, closing a valve at the inlet end of the screw cavity, detecting the flow rate of the storage cavity as L1 by a flow rate detector under the starting of the screw, and if L1 is not less than L, judging that no caking exists, and entering the storage cavity;

s3) if the flow detected by the storage cavity flow detector is L1, if L1 is less than L, judging that agglomeration exists, closing a discharge end valve of the screw cavity, controlling a motor to increase the rotating speed, fully and rotationally stirring the latex in the screw cavity, and breaking the agglomeration, wherein the stirring time is T2;

s4) after a T2 time period, opening a discharge end valve of the screw cavity, wherein the flow detected by a flow detector of the storage cavity is L2, if L1 is less than L, judging that agglomeration still exists, if the discharge end valve of the screw cavity needs to be closed, reducing the rotating speed of the motor, increasing the torque of the motor, and grinding the latex for T3;

s5) after a T3 time period, opening a discharge end valve of the screw cavity, wherein the flow detected by a flow detector of the storage cavity is L2, if L2 is less than L, judging that the caking still exists, and needing manual cleaning, and if L2 is more than or equal to L, judging that the caking does not exist, and entering the storage cavity;

s4) in the time periods of T2 and T3, starting a heater to heat the outer wall of the screw cavity, wherein the heating temperature is between 200 and 300 ℃;

s3) detecting the current and the rotating speed of the motor again, recording the current and the rotating speed as I1 and V1, and judging whether I1 is less than or equal to I, V1 is less than or equal to V or I is more than I1 and more than I0, and V is more than V1 and more than V0;

s4) if I1 is not less than I and V is not less than V1, heating the heating temperature control device at constant temperature by the temperature control device and opening;

s5) if I is more than I1 and less than I0, and V is more than V1 and less than V0, increasing the heating temperature, wherein the lifting range of the heating temperature is within 50 ℃, and the heating time is T2;

s6) detecting the current and the rotating speed of the motor again after a T2 time period, recording the current and the rotating speed as I2 and V2, judging whether I2 is equal to or less than I, V2 is equal to or less than V or I2 is equal to or less than I1, V is equal to or less than V2 and equal to V1, and if I2 is equal to or less than I and V2 is equal to or less than V, heating the heating temperature control device at constant temperature through the temperature control device; if I is less than I2 and less than I1, and V is less than V2 and less than V1, increasing the heating temperature, wherein the increase range of the heating temperature is within 20 ℃, and if the set value is not reached, continuing to increase the heating temperature, and the increase range of the heating temperature is within 20 ℃;

s7) repeats steps S2-S6.

By adopting the technical scheme, the method has the beneficial effects that 1, the PPS reinforced base cloth is laid above the pure PPS short fiber net, the PPS short fiber layer mixed with the conductive fibers is further laid, and under the actual filtering working condition, the short fiber layer mixed with the conductive fibers is used as a dust facing surface, so that the conductive performance of the conductive fibers is fully exerted, and the antistatic effect is exerted;

2. the reinforced PPS base cloth layer is formed by crosswise weaving base cloth fibers into rectangular hollow spaces, and a plurality of ring-shaped structures are arranged in the spaces, so that short fibers are conveniently and efficiently entangled and attached in the subsequent needling process, the composite effect of the short fiber layer and the base cloth is effectively increased, the problem of skewness is obviously reduced, and the needled felt is good in mechanical properties in the warp and weft directions and high in dimensional stability;

3. by arranging the discharge structure for controlling the discharge amount of latex at the discharge port of the latex coating machine, the discharge structure comprises a plurality of discharge channels connected with the discharge port of the latex coating machine, a buffer chamber connected with each discharge channel, a first adjusting cylinder arranged in the buffer chamber and provided with a first adjusting cylinder and a second adjusting cylinder, a first piston arranged in the first adjusting cylinder, a reset spring arranged in a rodless cavity of the first adjusting cylinder, a second piston arranged in the first adjusting cylinder, a connecting rod sequentially connecting the first piston and the second piston, a shunt channel arranged on the inner wall of the buffer chamber and a stressed piston arranged on the connecting rod and used for plugging the shunt channel under the non-stressed state of the reset spring, and by adopting the structure arrangement, the primary buffer during latex discharge is formed by the reset spring through the double-cylinder structure, the arrangement of the double-cylinder structure increases the dispersion degree after being stressed on one hand, improves the supporting strength on the other hand, and has strong stability and simple structure;

4. further, the discharging structure is arranged to further comprise a one-way valve arranged in a rodless cavity of the second adjusting cylinder, a first flow passage penetrating through the second piston, a second flow passage arranged on the first piston and penetrating through a piston rod of the first piston, a third flow passage arranged in the connecting rod and sequentially communicating the first flow passage and the second flow passage, a radial flow passage arranged in the plug body part of the first piston, an axial flow passage penetrating through the plug body part of the first piston towards one side of the rod cavity of the first adjusting cylinder, and an outer flow passage arranged on the rod cavity of the first adjusting cylinder, wherein an airflow flow path is formed by the first flow passage, the third flow passage, the second flow passage, the radial flow passage, the axial flow passage and the outer flow passage which are sequentially communicated, when the plug body is stressed, the air pressure in the second adjusting cylinder flows out from the outer flow passage of the first adjusting cylinder through the airflow path, the path for the airflow to flow is increased, so that the buffering effect formed after stress is increased, the stability is strong, the structure is simple, and the latex can slowly flow out;

5. further, the side, close to the inner wall of the first adjusting cylinder, of the radial channel is provided with the mounting channel, the connecting spring and the stress block, the stress block abuts against the inner wall of the first adjusting cylinder when being subjected to force from one side of the radial channel, when the stress plug body is stressed instantly, the part of impact force can impact the stress block, and the stress block abuts against the inner wall of the first adjusting cylinder, so that the instant buffering effect is realized, the stability is high, the structure is simple, and latex can flow out slowly;

6. through the dual processing of preventing caking processing and heat treatment to latex, increased the good effect of handling latex, prevent the inhomogeneity when scribbling latex, reduced the risk of the latex of caking to discharging channel's jam on the one hand, on the other hand has also reduced the viscosity of latex, the degree of consistency when having realized the rubber coating to make the acupuncture felt that oxidation resistance is good.

Drawings

FIG. 1 is a sectional view of an emulsion coating machine in an embodiment of a production method of an antioxidant and antistatic needled felt in a steel plant.

FIG. 2 is an enlarged view of the structure A in FIG. 1, which is an embodiment of the method for producing the anti-oxidation and anti-static needled felt in the steel and iron works of the present invention.

FIG. 3 is an enlarged view of the structure B in FIG. 1, which is an embodiment of the method for producing the anti-oxidation and anti-static needled felt in the steel and iron works of the present invention.

FIG. 4 is a control flow chart 1 of an embodiment of the method for producing the anti-oxidation and anti-static needled felt in the steel plant.

FIG. 5 is a control flow chart 2 of an embodiment of the method for producing the anti-oxidation and anti-static needled felt in the steel plant.

Reference number in the figure, 10, the outlet channel; 2. a buffer chamber; 20. a first regulating cylinder; 21. a second regulating cylinder; 201. a first piston; 22. a return spring; 210. a second piston; 23. a connecting rod; 24. a flow dividing channel; 25. a stressed piston; 211. a one-way valve; 212. a first flow passage; 213. a second flow passage; 214. a third flow path; 215. a radial flow passage; 216. an axial flow passage; 217. an outer flow passage; 218. installing a channel; 219. a connecting spring; 220. a stress block; 3. a screw cavity; 30. a heater; 31. an electromagnetic on-off valve; 32. a temperature control regulator; 4. a storage chamber; 40. a barrier net; 41. a flow monitor; 5. and a controller.

Detailed Description

The embodiment of the method for producing the oxidation-resistant and static-free needled felt of the steel plant is further explained with reference to fig. 1 to 5.

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.

A production method of an antioxidant and antistatic needled felt for a steel plant comprises the following steps of S1, fiber proportioning and mixing: selecting PTFE short fibers, conductive fibers and PPS fibers, wherein the mixing ratio of the conductive fibers to the PTFE short fibers is 1: 10;

The method comprises the following steps of laying PPS (polyphenylene sulfide) reinforced base cloth above a pure PPS short fiber net, further laying a PPS short fiber layer mixed with conductive fibers, and taking the PPS short fiber layer mixed with the conductive fibers as a dust facing surface under the actual filtering working condition, so that the conductive performance of the conductive fibers is fully exerted, and the antistatic effect is exerted;

furthermore, the reinforced PPS base cloth layer is formed by weaving base cloth fibers into rectangular hollow spaces in a warp-weft crossed manner, and a plurality of ring-shaped structures are arranged in the spaces, so that short fibers are conveniently and efficiently entangled and attached in the subsequent needling process, the compounding effect of the short fiber layer and the base cloth is effectively improved, the problem of skewness is obviously reduced, and the needled felt is good in warp-weft mechanical property and high in dimensional stability;

adopt the PTFE emulsion of high solid content to carry out the aftertreatment to the needled felt, make the PPS fibrous surface fully wrap up the PTFE emulsion, under actual filtration operating mode, the flue gas directly contacts with PTFE, can't get into PPS fibre inside, has improved the antioxidant property of filter bag greatly.

The invention is further arranged that a discharging structure for controlling the discharging amount of latex is arranged at the discharging port of the latex coating machine, the discharging structure comprises a plurality of discharging channels 10 connected with the discharging port of the latex coating machine, a buffer chamber 2 connected with each discharging channel 10, a first adjusting cylinder 20 arranged in the buffer chamber 2 and provided with a first adjusting cylinder 20 and a second adjusting cylinder 21, a first piston 201 arranged in the first adjusting cylinder 20, a return spring 22 arranged in a rodless cavity of the first adjusting cylinder 20, a second piston 210 arranged in the first adjusting cylinder 20, a connecting rod 23 sequentially connected with the first piston 201 and the second piston 210, a shunting channel 24 arranged on the inner wall of the buffer chamber 2 and a stressed piston 25 arranged on the connecting rod 23 and blocking the shunting channel 24 under the non-stressed state of the return spring 22, the discharging structure for controlling the discharging amount of latex is arranged at the discharging port of the latex coating machine, the discharge structure comprises a plurality of discharge channels 10 connected with a discharge port of the latex coating machine, a buffer chamber 2 connected with each discharge channel 10, a first adjusting cylinder 20 arranged in the buffer chamber 2 and provided with a first adjusting cylinder 20 and a second adjusting cylinder 21, a first piston 201 arranged in the first adjusting cylinder 20, a reset spring 22 arranged in a rodless cavity of the first adjusting cylinder 20, a second piston 210 arranged in the first adjusting cylinder 20, a connecting rod 23 sequentially connecting the first piston 201 and the second piston 210, a shunt channel 24 arranged on the inner wall of the buffer chamber 2 and a stressed piston 25 arranged on the connecting rod 23 and blocking the shunt channel 24 under the non-stressed state of the reset spring 22, and by adopting the structure arrangement, the latex is buffered through the arranged double-cylinder structure and the reset spring 22, and the double-cylinder structure on one hand increases the dispersion degree after being stressed, on the other hand, the support strength is improved, the stability is strong, and the structure is simple.

The invention is further arranged that the discharging structure further comprises a one-way valve 211 arranged in the rodless cavity of the second adjusting cylinder 21, a first flow passage 212 penetrating through the second piston 210, a second flow passage 213 arranged on the first piston 201 and penetrating through the piston rod of the first piston 201, a third flow passage 214 arranged in the connecting rod 23 and sequentially communicating the first flow passage 212 and the second flow passage 213, a radial flow passage 215 arranged in the plunger portion of the first piston 201, an axial flow passage 216 penetrating through the plunger portion of the first piston 201 to the side of the rod cavity of the first adjusting cylinder 20, and an outer flow passage 217 arranged on the rod cavity of the first adjusting cylinder 20, and further comprises the one-way valve 211 arranged in the rodless cavity of the second adjusting cylinder 21, the first flow passage 212 penetrating through the second piston 210, the second flow passage 213 arranged on the first piston 201 and penetrating through the piston rod of the first piston 201, and a third flow passage 214, The third flow channel 214 is arranged in the connecting rod 23 and sequentially communicated with the first flow channel 212 and the second flow channel 213, the radial flow channel 215 is arranged in the plug body part of the first piston 201, the axial flow channel 216 penetrates through the plug body part of the first piston 201 towards one side of the rod cavity of the first adjusting cylinder 20, and the outer flow channel 217 is arranged on the rod cavity of the first adjusting cylinder 20.

The present invention is further configured such that the radial passage has a mounting passage 218 formed at a side thereof adjacent to the inner wall of the first regulation cylinder 20, a connection spring 219 disposed in the mounting passage 218, and a force receiving block 220, and when the force receiving block 220 receives a force from the side of the radial passage, the inner wall of the first adjusting cylinder 20 is abutted, and further, by arranging an installation channel 218, a connecting spring 219 arranged in the installation channel 218 and a force bearing block 220 at one side of the radial channel, which is close to the inner wall of the first adjusting cylinder 20, the force bearing block 220 is abutted against the inner wall of the first adjusting cylinder 20 when receiving a force from one side of the radial channel, when the force-bearing plug body is stressed instantly, the impact force can impact the force-bearing block 220, the force-bearing block 220 forms a collision against the inner wall of the first adjusting cylinder 20, thereby realized the effect of buffering in the twinkling of an eye, stability is strong, and simple structure ensures the outflow that latex can be slow.

The latex coating machine is further arranged to be driven by a motor to rotate a screw to discharge materials, and comprises a screw cavity 3 and a storage cavity 4 which are sequentially arranged along the flowing direction of latex, a heater 30 is arranged on the outer wall of the screw cavity 3, a blocking net 40 is arranged between the screw cavity 3 and the storage cavity 4, and a flow monitor 41 is arranged at the inlet end of the storage cavity 4.

The invention is further provided that the feed end and the discharge end of the screw cavity 3 are both provided with electromagnetic on-off valves 31, the flow monitor 41 is provided with a controller 5 by signals, and the controller 5 is used for controlling the starting and stopping of the motor, the rotating speed and the on-off of the electromagnetic on-off valves 31.

The invention is further arranged that the heater 30 comprises a plurality of annular heating pipes arranged on the outer wall of the screw cavity 3 and a temperature control regulator 32 electrically connected with each heating pipe, the temperature control regulator 32 is in signal connection with the controller 5, the structure is adopted, the heating pipes are composed of an inner pipe and an outer pipe through the arranged heating pipes, a vacuum gap structure filled with heating media is arranged between the inner pipe and the outer pipe, a heating rod is arranged in the vacuum gap structure, the heating media are used as heating carriers, the indirect structure operation is realized, the heating temperature control is convenient after one media is added, the practicability is strong, the structure is simple, the heating rod is used as a more conventional heating means for technicians in the field, and the description is omitted in the invention.

The invention is further arranged that the controller 5 further comprises a current monitor for monitoring the current of the motor; the rotating speed monitor is used for monitoring the rotating speed of the motor, and the specific heating steps are as follows: s1) setting the current value and the rotating speed value of the motor under the standard latex viscosity as I and V, detecting whether the latex is full through the flow monitor 41 after the latex is introduced, setting the output flow as L after the latex is full, detecting the current and the rotating speed of the motor at the moment, and recording as I0 and V0;

s2) detecting whether the caking exists in the screw cavity 3 in the T1 time period, closing a valve at the inlet end of the screw cavity 3, detecting the flow rate of the storage cavity 4 by a flow rate detector under the starting of the screw to be L1, and if L1 is not less than L, judging that the caking does not exist, and entering the storage cavity 4;

s3) if the flow detected by the flow detector of the storage cavity 4 is L1, if L1 is less than L, judging that agglomeration exists, closing a discharge end valve of the screw cavity 3, controlling a motor to increase the rotating speed, fully and rotationally stirring the latex in the screw cavity 3, and breaking the agglomeration, wherein the stirring time is T2;

s4) after a T2 time period, opening a discharge end valve of the screw cavity 3, wherein the flow detected by a flow detector of the storage cavity 4 is L2, if L2 is less than L, judging that agglomeration still exists, closing the discharge end valve of the screw cavity 3, reducing the rotating speed of a motor, increasing the torque of the motor, and grinding latex for T3;

s5) after a T3 time period, opening a discharge end valve of the screw cavity 3, wherein the flow detected by a flow detector of the storage cavity 4 is L2, if L2 is less than L, judging that agglomeration still exists, needing manual cleaning, and if L2 is more than or equal to L, judging that no agglomeration exists, and entering the storage cavity 4;

s4) in the time periods of T2 and T3, the heater 30 is started to heat the outer wall of the screw cavity 3, and the heating temperature is between 200 and 300 ℃;

s7) repeats steps S2-S6.

Through the dual processing of preventing caking processing and heat treatment to latex, increased the good effect of handling latex, prevent the inhomogeneity when scribbling latex, reduced the risk of the latex of caking to discharging channel 10's jam on the one hand, on the other hand has also reduced the viscosity of latex, degree of consistency when having realized the rubber coating to make the acupuncture felt that oxidation resistance is good.

The above description is only a preferred embodiment of the present invention, and is not intended to limit 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

1. A production method of an antioxidant and antistatic needled felt in a steel plant is characterized by comprising the following steps of S1, fiber proportioning and mixing: selecting PTFE short fibers, conductive fibers and PPS fibers, wherein the mixing ratio of the conductive fibers to the PTFE short fibers is 1: 10;

s3, carding and lapping: the net discharging speed of a carding machine is 20m/min, a PTFE short fiber and conductive fiber mixed fiber net made by the carding machine is used for standby, an additional base fabric made of PPS fibers is woven into rectangular hollow spaces by warp and weft crossing of the PPS fibers, a pure PTFE short fiber net is made of pure PTFE short fibers, the pure PTFE short fiber net and the mixed fiber net are sequentially laid on the surface of the enhancement base fabric, the laying speed is 4m/min, and the laid fiber net is fed into a needling area by a net feeding mechanism;

2. The production method of the anti-oxidation and anti-static needled felt for the steel and iron works according to claim 1, wherein a discharging structure for controlling the discharging amount of the latex is arranged at a discharging port of the latex coating machine, the discharging structure comprises a plurality of discharging channels (10) connected with the discharging port of the latex coating machine, a buffer chamber (2) connected with each discharging channel (10), a first adjusting cylinder (20) arranged in the buffer chamber (2) and provided with a first adjusting cylinder (20) and a second adjusting cylinder (21), a first piston (201) arranged in the first adjusting cylinder (20), a reset spring (22) arranged in a rodless cavity of the first adjusting cylinder (20), a second piston (210) arranged in the first adjusting cylinder (20), a connecting rod (23) sequentially connecting the first piston (201) and the second piston (210), a shunting channel (24) arranged on the inner wall of the buffer chamber (2), and a shunting channel (24) arranged on the connecting rod (23) and on the inner wall of the buffer chamber (2) The return spring (22) blocks a stressed piston (25) of the shunt passage (24) in an unstressed state.

3. The production method of the anti-oxidation and anti-static needled felt for the steel and iron works according to claim 2, wherein the discharging structure further comprises a one-way valve (211) arranged in a rodless cavity of the second adjusting cylinder (21), a first flow channel (212) penetrating through the second piston (210), a second flow channel (213) arranged on the first piston (201) and penetrating through a piston rod of the first piston (201), a third flow channel (214) arranged in the connecting rod (23) and sequentially communicating the first flow channel (212) with the second flow channel (213), a radial flow channel (215) arranged in a plug body part of the first piston (201), an axial flow channel (216) penetrating through the plug body part of the first piston (201) to one side of a rod cavity of the first adjusting cylinder (20), and an outer flow channel (217) arranged on the rod cavity of the first adjusting cylinder (20).

4. The production method of the anti-oxidation and anti-static needled felt for the steel and iron works, according to claim 3, is characterized in that one side of the radial channel, which is close to the inner wall of the first adjusting cylinder (20), is provided with an installation channel (218), a connecting spring (219) arranged in the installation channel (218), and a force bearing block (220), and when the force bearing block (220) bears the force from one side of the radial channel, the force bearing block is abutted against the inner wall of the first adjusting cylinder (20).

5. The production method of the anti-oxidation and anti-static needled felt for the steel and iron works according to claim 2, wherein the latex coating machine drives a screw rod to rotate for discharging, and comprises a screw rod cavity (3) and a storage cavity (4) which are sequentially arranged along the flowing direction of latex, a heater (30) is arranged on the outer wall of the screw rod cavity (3), a blocking net (40) is arranged between the screw rod cavity (3) and the storage cavity (4), and a flow monitor (41) is arranged at the inlet end of the storage cavity (4).

6. The production method of the antioxidant and antistatic needle felt for the steel plant according to claim 5 is characterized in that electromagnetic on-off valves (31) are arranged at the feeding end and the discharging end of the screw cavity (3), the flow monitor (41) is provided with a controller (5) according to signals, and the controller (5) is used for controlling the starting and stopping of a motor, the rotating speed and the on-off of the electromagnetic on-off valves (31).

7. The production method of the anti-oxidation and anti-static needled felt for the steel and iron works according to claim 6, wherein the heater (30) comprises a plurality of annular heating pipes arranged on the outer wall of the screw cavity (3) and a temperature control regulator (32) electrically connected with each heating pipe, the temperature control regulator (32) is in signal connection with the controller (5), each heating pipe consists of an inner pipe and an outer pipe, and a vacuum gap structure filled with a heating medium is arranged between the inner pipe and the outer pipe.

8. The production method of the oxidation-resistant and static-free needled felt for the steel and iron works according to claim 1, wherein the controller (5) further comprises a current monitor for monitoring the current of the motor; the rotating speed monitor is used for monitoring the rotating speed of the motor, and the specific heating steps are as follows: s1) setting the current value and the rotating speed value of the motor under the standard latex viscosity as I and V, detecting whether the latex is full through a flow monitor (41) after the latex is introduced, setting the output flow as L after the latex is full, detecting the current and the rotating speed of the motor at the moment, and recording as I0 and V0;

s2) detecting whether the caking exists in the screw cavity (3) in the T1 time period, closing a valve at the inlet end of the screw cavity (3), detecting the flow rate of the storage cavity (4) as L1 under the starting of the screw, and if L1 is not less than L, judging that the caking does not exist, and entering the storage cavity (4);

s3) if the flow detected by the flow detector of the storage cavity (4) is L1, if L1 is less than L, judging that the agglomeration exists, closing a discharge end valve of the screw cavity (3), controlling a motor to increase the rotating speed, fully and rotationally stirring the latex in the screw cavity (3), and breaking the agglomeration for T2;

s4) after a T2 time period, opening a discharge end valve of the screw cavity (3), wherein the flow detected by a flow detector of the storage cavity (4) is L2, if L2 is less than L, judging that agglomeration still exists, closing the discharge end valve of the screw cavity (3) is needed, reducing the rotating speed of a motor, increasing the torque of the motor, grinding latex, and the grinding time is T3;

s5) after a T3 time period, opening a discharge end valve of the screw cavity (3), wherein the flow detected by a flow detector of the storage cavity (4) is L2, if L2 is less than L, judging that the caking still exists and needing manual cleaning, and if L2 is more than or equal to L, judging that the caking does not exist and entering the storage cavity (4);

s4) in the time periods of T2 and T3, starting the heater (30) to heat the outer wall of the screw cavity (3), wherein the heating temperature is between 200 and 300 ℃;

s5) if I is more than I1 and less than I0, and V is more than V1 and less than V0, increasing the heating temperature, wherein the rising range of the heating temperature is within 50 ℃, and the heating time is TS;

s6) detecting the current and the rotating speed of the motor again after the TS time period, recording the current and the rotating speed as I2 and V2, judging whether I2 is less than or equal to I, V2 is less than or equal to V or I2 is less than I1, V is less than V2 and less than V1, and if I2 is less than or equal to I and V2 is less than or equal to V, heating the heating temperature control device at constant temperature through the temperature control device; if I is more than I2 and less than I1, and V is more than V2 and less than V1, increasing the heating temperature, wherein the increase range of the heating temperature is within 20 ℃, and if the set value is not reached, continuing to increase the heating temperature, wherein the heating temperature is within 20 ℃ and the heating time is TP;

s7) repeats steps S2-S6.