CN111764050B

CN111764050B - Insulation board production line

Info

Publication number: CN111764050B
Application number: CN202010566883.8A
Authority: CN
Inventors: 孟博; 张书庭; 林大庆; 宗文波; 黎昱; 殷参; 张玉生; 陈维强; 张北; 周欣欣
Original assignee: Beijing Satellite Manufacturing Factory Co Ltd
Current assignee: Beijing Satellite Manufacturing Factory Co Ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-08-10
Anticipated expiration: 2040-06-19
Also published as: CN111764050A

Abstract

The invention provides a production line of insulation boards, which takes inorganic fibers and water-soluble adhesives as raw materials to produce the insulation boards and comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing forming. According to the invention, through research and development and transformation of production equipment of each process, the production can be carried out at high efficiency, the shutdown rate is low, the problem of capacity matching of the equipment of each process is solved, and the produced insulation board meets the advantages of fire resistance, heat insulation, no toxicity, high vertical board surface tensile strength and high volume weight and thickness requirements.

Description

Insulation board production line

Technical Field

The invention belongs to the technical field of heat-insulating fireproof material manufacturing, and particularly relates to a production line of a heat-insulating plate.

Background

In the building industry, once and again, building fire happens because the outer wall is on fire, and the fire in one building rapidly spreads from one room to the whole outer wall and is covered by the fire in the whole building. The high temperature of the big fire of the bear and the smoke of the strong smoker are the main causes of death by injury in the fire. Every year, many fresh lives are swallowed by building fire, and a new tragic experience tells people that products which have fire prevention, high heat preservation and no toxicity are on the market at present, and the products which can protect the safety of people's lives and properties are rare. Therefore, the unit invests a large amount of human and material resources to research and develop the heat insulation board, a novel heat insulation board is obtained, the novel heat insulation board mainly comprises inorganic fibers and an adhesive, the dilemma that fireproof materials do not preserve heat and heat insulation materials do not prevent fire on the market is solved, and the novel heat insulation board has the characteristics of being green, non-toxic and the like. Along with the gradual maturity and stability of novel heated board technique, market demand is more obvious, and batch production, the novel heated board of supply become the problem that is compelling.

However, the heat insulation plate belongs to a new material technology, and no existing production line equipment and process can be referred to in the market. The new production line needs to solve the following problems:

(1) the unit weight and the thickness demand of this novel heated board can't be satisfied to common needled felt establishment trade product and equipment in market, and present heated board thickness is not more than 25mm, and the unit weight generally is not higher than 150kg/m³When the heat-insulating plate is used for manufacturing an outer wall structure, the high volume weight is favorable for the impact resistance of a wall body and the tensile strength of a high vertical plate surface, and the heat-insulating plate with larger thickness is suitable for the aspect with high requirement on heat-insulating performance;

(2) the heat transfer technology and equipment of common composite material curing furnaces in the market can not meet the rapid curing requirement of the novel low-heat-conduction insulation board, if a conventional heating furnace or drying room is adopted, the curing time is very long, the pressurization is difficult, the cost is high, and the requirement of time and beat of a batch production line is not met;

(3) the combustion and toxicity-causing auxiliary agents in the raw material formula in the laboratory state, which are the same as other fireproof heat-insulating materials, need to be avoided as much as possible when the production line is produced in batches so as to meet the requirements of environmental protection and no toxicity;

(4) the production beat can be ensured only by matching the productivity in each process stage on the production line, and the front and rear sequences can not be broken or overstocked at a uniform speed.

Therefore, it is necessary to develop a novel insulation board production line to meet the batch production requirements of the novel insulation boards which are fireproof, heat-insulating, nontoxic and have high vertical board surface tensile strength.

Disclosure of Invention

In order to overcome the defects in the prior art, the inventor of the invention carries out keen research, provides a production line of the heat-insulating plate, realizes the first cross-field and cross-industry series connection of a plurality of industrial devices, comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding, curing and cutting, can be efficiently produced by carrying out research and development and modification on production equipment of each working procedure, has low downtime rate, solves the problem of capacity matching of equipment of each working procedure, and can meet the advantages of fire resistance, heat preservation, no toxicity and high tensile strength of a vertical plate surface and meet the requirements of high volume weight and large thickness, thereby completing the invention.

The technical scheme provided by the invention is as follows:

a production line of insulation boards takes inorganic fibers and water-soluble adhesives as raw materials to produce the insulation boards, and comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing forming, wherein the feeding working procedure implements grabbing and feeding of the inorganic fibers; the unpacking and opening process is used for unpacking and opening the fibers sent from the preorder through the conveying belt; carding the fibers subjected to opening treatment by a carding procedure, and transmitting the fibers to a lapping procedure; the lapping procedure receives the carded fibers and uniformly lays the fibers into a plurality of fiber layers; the needling process compresses the fiber layer by using a needling process; the cutting procedure is used for cutting burrs at two ends of the needle punched material in the width direction and entering the spraying procedure through a conveying belt; the spraying procedure sprays and distributes the water-soluble adhesive on the inorganic fiber; the glue squeezing process squeezes the glue-containing fiber to control the glue content in the fiber; the curing and forming process adopts microwave curing equipment, the adhesive is cured by directly acting microwaves on the materials, waste gas generated during curing is pumped away, hot gas generated after the waste gas is combusted is reflowed and compensated into the microwave curing equipment, the heat balance in the microwave curing equipment is achieved, and the product is cured and formed.

The production line of the insulation board provided by the invention has the following beneficial effects:

(1) the production line of the invention is characterized in that equipment related to different industries are customized and connected in series according to the process characteristics of the novel insulation board, so that the first production line is established, the problem of matching of multiple factors such as electricity, heat, gas, composite materials, production beats and the like is solved through unified debugging, the batch production of the novel insulation board is realized, the novel insulation board is different from the traditional structure, and the composite material production line is redefined;

(2) according to the invention, in the feeding process, the mechanical gripper is matched with the feeding machine, the traditional mode that manpower is matched with the feeding machine for feeding is changed, the mechanical gripper is controlled through an automatic program, the automation capacity of a production line is improved, the premixing of raw materials can be realized through the quick grabbing-releasing operation of the mechanical gripper, and the uniformity of the materials is improved;

(3) according to the invention, the opener is added at the front end of the carding machine, and the magnetic suction piece is creatively introduced, and the falling direction of the fiber is controlled, so that the iron wire/scrap iron impurities in the fiber are effectively removed, and the safety of the subsequent curing process is maintained;

(4) according to the invention, the fiber layer with the thickness capable of being greatly improved is obtained by increasing the lengths of the carding machine and the lapping machine roller and increasing the heights of the trolley and the bottom curtain in the lapping machine, which is a premise of obtaining the high-volume-weight and large-thickness insulation board and is beneficial to obtaining the high-volume-weight and large-thickness insulation board;

(5) according to the invention, the static electricity removing device is arranged on the carding machine, and the talcum powder is spread on the roller of the carding machine, so that the generation of fiber static electricity can be reduced, and the fiber is prevented from being adhered to the roller to cause cotton jamming between the rollers;

(6) according to the invention, the static electricity removing device is arranged on the lapping machine, and the static electricity removing agent is atomized above the conveyor belt, so that the generation of fiber static electricity is reduced, and the problem that the roller needs to be frequently stopped for cleaning when being wound with cotton is solved;

(7) in the invention, a pipeline type spraying process different from the prior art is developed, and the storage tank, the servo pipe and the spraying pipe are combined to ensure that the spraying process can be continuously carried out and the spraying uniformity is high;

(8) according to the microwave curing equipment and the microwave curing process, the problems of uneven curing and poor quality of the low-heat-conduction material are solved through the partition arrangement of the microwave curing equipment, the curing time is shortened, the curing pressure is removed, the curing temperature is reduced, the use of curing aids is reduced, the energy utilization rate is improved, the energy consumption is greatly reduced, and the cost is reduced;

(9) the invention benefits from the selection of microwave curing equipment/process, and the forming of the heat-insulating plate can be realized without adding organic solvent, coupling agent or curing agent in the production process of the product, thereby ensuring the production safety and improving the safety and quality of the product.

Drawings

FIG. 1 shows a flow diagram of a production line for insulation boards according to the present invention;

FIG. 2 shows a schematic structural view of an opener in a preferred embodiment of the present invention;

FIG. 3 shows a schematic structural view of a carding machine and a lapping machine in a preferred embodiment of the invention;

FIG. 4 is a schematic view showing the structure of a static discharge apparatus of a carding machine according to a preferred embodiment of the present invention;

FIG. 5 shows a block diagram of a shower apparatus according to a preferred embodiment of the present invention, wherein FIG. 5a is a front view of a shower pipe; FIG. 5b is a cross-sectional view taken along line A-A of FIG. 5 a; FIG. 5c is a side view of the shower; FIG. 5d is a cross-sectional view taken along line B-B of FIG. 5 c;

FIG. 6 is a structural view of a microwave curing apparatus in a preferred embodiment of the present invention;

FIG. 7 is a schematic view showing the structure of an RTO incinerator in a preferred embodiment of the present invention.

Description of the reference numerals

101-magnetron, 102-air outlet, 103-hot air inlet, 104-press roll, 201-conveyor belt, 202-gear, 203-support roll, 301-waste gas inlet, 302-waste gas pipeline, 303-heat storage chamber, 304-hearth, 305-drain pipe, 401-feed roll, 402-carding roll combination, 403-wire, 404-metal rod, 501-conveyor belt, 502-guide roll, 503-trolley, 504-bottom curtain, 505-atomizer, 506-cotton press roll, 601-fan, 602-fan pipeline, 603-opening chamber, 604-magnet, 605-baffle.

Detailed Description

The features and advantages of the present invention will become more apparent and appreciated from the following detailed description of the invention.

The invention provides a production line of an insulation board, as shown in figure 1, the production line takes inorganic fibers and a water-soluble adhesive as raw materials to produce the insulation board, and comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing forming, wherein the feeding working procedure implements grabbing and feeding of the inorganic fibers; the unpacking and opening process is used for unpacking and opening the fibers sent from the preorder through the conveying belt; carding the opened fiber in a carding procedure, dispersing the fiber bundles into single fibers as much as possible, and transmitting the single fibers to a lapping procedure; the lapping procedure receives the carded fibers and uniformly lays the fibers into a plurality of fiber layers; the needling process compresses the fiber layer by using a needling process; the cutting procedure cuts burrs at two ends of the punched material in the width direction, ensures the quality consistency of the residual material, and enters a spraying procedure through a conveyor belt; the spraying procedure sprays and distributes the water-soluble adhesive on the inorganic fiber; the glue squeezing process squeezes the glue-containing fiber to control the glue content in the fiber; the curing and forming process adopts microwave curing equipment, the adhesive is cured by directly acting microwaves on the materials, waste gas generated during curing is pumped away, hot gas generated after the waste gas is combusted is reflowed and compensated into the microwave curing equipment, the heat balance in the microwave curing equipment is achieved, and the product is cured and formed.

In the feeding process, the adopted equipment is a feeding machine, and the automatic grabbing and feeding of the inorganic fibers are implemented. Compared with a traditional feeding machine, the equipment is provided with the mechanical gripper, the traditional mode that the feeding machine is matched with manpower is changed, the mechanical gripper is controlled through an automatic program, the automation capacity of a production line is improved, premixing of raw materials can be realized through quick grabbing-releasing operation of the mechanical gripper, and the uniformity of materials is improved. Meanwhile, the inorganic fiber raw material can cause skin itching, so that manual operation is avoided by using a manipulator, and workers are protected. The loading processing capacity is a production line matching parameter and is limited by production line capacity, for example, the loading processing capacity can be 100-400 kg/h.

In the bale opening and opening processes, the adopted devices are respectively a bale opener and an opener. The fiber processing capacity of the bale opener and the fiber processing capacity of the opener are production line matching parameters and are limited by production line capacity, and if the processing capacities are both 100-400 kg/h. The bale opener adopts equipment commonly used can, and the opener is broach nail board type opener, blows the free falling body realization after the fibre and opens through the fan.

The whole production line is observed in a longitudinal mode, and in the subsequent insulation board curing and forming process, the insulation board is supposed to be cured and formed by adopting microwave curing equipment, so that the problem that a common composite material heating furnace or a drying room in the market cannot meet the requirement of rapid curing of a newly developed low-heat-conduction novel insulation board is solved. However, microwaves are sensitive to metal impurities, and if more metal impurities are doped in the fibers, electric sparks are generated in microwave curing equipment, so that the materials are ignited, and serious safety accidents are caused. Researches show that metal impurities in the fibers are generally scrap iron/iron wires, so that the inventor modifies the existing opener, and the opener is provided with a magnetic suction piece to adsorb and remove the iron metal impurities. As shown in FIG. 2, the opener comprises a fan 601, a fan pipeline 602, an opening chamber 603, a magnet 604 fixed on the wall surface of the opening chamber 603 and a conveyor belt below the magnet, the fan 601 sends the fibers into the fan pipeline 602 which is upward, the fibers enter the opening chamber 603 from an inlet at the top of the opening chamber 603, the fibers are loosened in the descending process, metal impurities in the fibers are separated from the fibers in the descending process, the fibers are magnetically attracted by the magnet 604 to remove the impurities, and the conveyor belt receives the fallen fibers and conveys the fibers to the carding machine.

Further, the top inlet of the opening chamber 603 is opened near a side wall surface of the opening chamber 603, on which the magnet 604 is mounted. The installation height of the magnet 604 on the side wall is 1/2-2/3 of the whole height of the side wall. One side fixed stop 605 of magnet 604 is kept away from to top entrance in opening room 603, stops that the fibre is unrestrained to waft, plays the effect of guide fibre direction of wafting, improves edulcoration efficiency.

During production, the cotton storage amount in the opening chamber needs to be matched with the carding capacity of the carding machine, otherwise, cotton breaking (small cotton storage amount) or cotton outlet blockage (large cotton storage amount) can be caused. Therefore, the height of the noil on the conveyor belt below the magnet is sensed by installing the photoelectric relay on the opener, the noil height is used for measuring the cotton storage amount, and if the noil height is lower than or higher than a limit value, the cotton outlet amount of the cotton outlet is adjusted by adjusting the feeding speed and the like, so that the problem of cotton breakage or cotton outlet blockage is avoided.

In the carding procedure, the adopted equipment is a carding machine; in the lapping process, the adopted equipment is a lapping machine. Aiming at solving the problems that the thickness of the prior heat-insulating board is generally not more than 25mm and the volume weight is generally not more than 150kg/m³The present inventor reforms transform the structure of carding machine and lapping machine, can obtain high unit weight heavy gauge heated board, can improve impact resistance and tensile strength through increase heated board unit weight, can satisfy the demand to higher thermal insulation performance through increase heated board thickness.

As shown in FIG. 3, the carding machine comprises a feeding roller 401 and a carding roller combination 402, the feeding roller 401 sends fibers into the carding roller combination 402 to carry out fiber carding, the length of the roller in the feeding roller 401 and the carding roller combination 402 is 2450-3000 mm, and is increased by about 50% compared with the length of a working roller of a conventional device; the lapping machine comprises a conveyor belt 501, a guide-in roller 502, a trolley 503 and a bottom curtain 504, wherein fibers on the conveyor belt 501 are conveyed to the trolley 503 through the guide-in roller 502, the trolley 503 reciprocates above the bottom curtain 504, the conveyed fibers are paved into a fiber layer on the bottom curtain 504, the bottom curtain 504 takes the fiber layer out of the lapping machine, the reciprocating direction of the trolley 503 is vertical to the advancing direction of the bottom curtain 504, and the length of the rollers in the guide-in roller 502 and the trolley 503 is not less than that of the rollers in the carding machine.

According to the invention, by increasing the lengths of the rollers in the carding machine and the lapping machine, in the movement process of the bottom curtain 504, the overlapped part between two adjacent fiber layers borne by the bottom curtain 504 is increased, so that loose fiber layers with increased thickness can be obtained, which is the premise of obtaining the insulation board with high volume weight and large thickness, the fiber layers are output by the bottom curtain and then enter a needling machine for needling, and when the conventional needling thickness is obtained or is slightly larger than the conventional needling thickness, the volume weight of the finally obtained insulation board is improved to a greater extent than that of the conventional insulation board, and further the corresponding mechanical property is improved; if the volume weight of the finally obtained insulation board after needling is equivalent to that of the conventional insulation board, the thickness of the insulation board is greatly improved compared with that of the conventional insulation board, namely the insulation performance is enhanced on the premise of not weakening the mechanical property; the needling thickness of the needling machine is controlled, so that the insulation board with the thickness and the volume weight increased simultaneously can be obtained.

In the present invention, the carding roller assembly 402 is determined according to the existing carding machine, and generally comprises a licker-in, a breast cylinder, a main carding cylinder, a doffer, a transfer roller and other rollers, and is a main unit for carding, and the specific structure can refer to the existing carding machine, and is not limited herein.

In production, the fact that static hazards are caused by friction electrification of fibers in the carding process is found, a static removing agent is used in the traditional static removing method, but the static removing agent is used at the front end of a fiber carding machine, when static electricity is accumulated to a certain degree in the fiber carding process, the carding machine is powered off for protection, and production cannot be carried out continuously.

Therefore, the inventor provides a static removing device, as shown in fig. 4, a roller shaft of a feeding roller 401 in a carding machine is connected with the static removing device, the static removing device comprises a conducting wire 403 and a metal rod 404, one end of the conducting wire 403 is connected with the roller shaft of the feeding roller 401, the other end of the conducting wire extends into the ground and is connected with the metal rod 404, and the metal rod 404 is located underground and guides static transmitted by the conducting wire 403 into the ground.

Further, the conductive wire 403 is a common conductive wire, and is covered with an insulating layer.

Further, the metal rod 404 is made of copper rod, zinc rod, tin rod, silver rod, gold rod, etc.; the diameter size is phi 2 mm-phi 2000mm, and the length size is 2 mm-5000 mm.

Further, the metal bar 404 is buried under the ground to a proper depth ranging from 1000mm to 10000 mm.

Compared with the prior art, the static electricity removing device is excellent in static electricity removing effect, the installation part is located at the roller of the carding machine, the defect of the static electricity removing technology of the existing static electricity removing agent is effectively overcome, the fiber feeding amount of the carding machine is not limited by static electricity accumulation, the carded fibers can be used for producing products with the thickness of 50-80 mm and the volume weight of more than 300kg/m3 at the thickest thickness, the product performance and the product types are greatly expanded, and more diversified application requirements can be met. Meanwhile, the device is simple in structure and convenient and fast to install, can be permanently used in one-time installation, and keeps the continuity of production, so that the energy consumption is effectively reduced, the production efficiency is improved, and the production cost is reduced.

As the static electricity of the inorganic fiber is easier to generate than that of cotton silk, in order to further improve the antistatic performance, the feeding roller 401 and the carding roller combination 402 of the carding machine are spread with talcum powder (only need to spread when the carding machine is started), so that the fiber is in a dry state, and the static electricity of the fiber is prevented from being adhered to the roller, or the fiber is adhered to the roller due to oil stain on the equipment, so that the roller is blocked.

The inventor further finds that the fall between the trolley 503 and the bottom curtain 504 of the lapping machine in the prior art is a factor for limiting a large-thickness fiber layer, namely, the existing lapping machine and the conventional bottom curtain 504 are adopted, the stable fiber layer is difficult to be paved between the trolley and the bottom curtain due to the increase of the carding machine and the lapping machine roller, and the fiber layer is uneven and even topples after reaching a certain thickness, so that the inventor improves the fall between the trolley 503 and the bottom curtain 504, the height of the fall between the trolley 503 and the bottom curtain 504 is 1.0-2.5 m, and the lapping fall is increased by 0.4-1.0 m compared with the conventional equipment.

However, the increase in the height of the laying head also brings about an increase in static electricity, which seriously affects the smooth progress of laying, and thus the present inventors have made extensive studies on this, on the one hand, to increase the static electricity removing means and on the other hand, to increase the humidity of the environment. For the first aspect, the static removing device may be the same as the static removing device in the carding machine, that is, it includes a wire and a metal rod, one end of the wire is connected to the roller shaft of any roller in the trolley 503, and the other end of the wire extends into the ground to be connected to the metal rod, and the metal rod is located underground to guide the static electricity transmitted from the wire into the ground.

To the second aspect, install atomizing device above lapping machine's the conveyer belt 501, this atomizing device includes conveying line and atomizer 505, and conveying line supplies with the antistatic agent to atomizer 505, and the atomizing direction of atomizer 505 is up, makes the antistatic agent spread to the air in, keeps ambient humidity to be 75% ~ 90%, and then reduces fibre static and produces, has prevented that the fibrous layer from appearing card cotton or sticky cotton phenomenon of piling up because of fibre friction static.

Further, since the thickness of the fiber layer is increased, in order to enable the large-thickness fiber layer to smoothly enter the needle machine of the needle punching process, the inventor of the present invention has studied that at least one cotton pressing roller 506 is installed in front of the conveying direction of the bottom curtain 504, the height between the cotton pressing roller 506 and the bottom curtain 504 is lower than the height of the laid fiber layer, the cotton pressing roller 506 presses the fiber layer, and the fiber layer enters the needle machine with a lower thickness, so that the needle punching is facilitated.

In the needling process, the adopted equipment is a needling machine. The needling process is divided into a pre-needling process and a main needling process, and the pre-needling process is used for reinforcing the first path of the supplied materials of the lapping machine, so that the fiber layer has two-dimensional disorder and three-dimensional order; the main needling process serves to further reinforce the pre-needled discharge. In the pre-needling process, an auxiliary clamping port is additionally arranged at the inlet of the needling machine, the auxiliary clamping port is of a horn mouth structure, the large mouth end faces the incoming material direction, and the small mouth end is connected with the inlet of the needling machine. The design of the auxiliary clamping opening is beneficial to receiving the large-thickness fiber layer.

Due to the transformation of the carding machine and the lapping machine, the thickness of the supplied material fiber layer is increased, the stroke of the needle machine in the pre-needling process is increased, such as from 80mm to 120mm, and the effective length of the conventional needle for needling is increased from 35mm to 65 mm. Due to the enhancing and compressing functions of the pre-needling process, the needling machine of the main needling process adopts conventional equipment in the industry.

In the cutting procedure, the adopted equipment is a longitudinal cutting fly cutter which is conventional equipment in the industry. Burrs at two ends of the needling discharged material in the width direction are removed through cutting, the quality consistency of the residual materials is ensured, and the residual materials enter a next procedure through a conveyor belt.

In a preferred embodiment of the invention, the conveyor belt for transporting the inorganic fibers in the carding, lapping and cutting process is a conveyor belt on which steel needles are arranged, and the roller and roller combination for transporting the inorganic fibers is a needle roller and needle roller combination.

In the spraying process, the water-soluble adhesive is sprayed and distributed on the inorganic fiber through a pipeline type spraying device. The traditional process mode is an immersion method or a shower head type, but the immersion method needs a large amount of solvent to bring solute into fibers, the large amount of solvent needs a large amount of energy to remove, the energy consumption is extremely high, the shower head type is not suitable for flow line production, and the adhesive cannot be uniformly sprayed on the surfaces of the fibers; thus, the present inventors have conducted extensive studies to confirm that the inline spraying is applied to inorganic fibers on a conveyor belt of a production line, and have provided an inline spraying apparatus suitable for production in the production line.

As shown in fig. 5, the pipeline-type spraying device comprises a storage tank, a servo pipe and a spraying pipe, wherein the storage tank is filled with water-soluble adhesive and is conveyed to the spraying pipe through the servo pipe,

the spray pipe is a conical pipe, and the preferred cone angle is 0.2-0.5 degrees; spraying holes with the diameter of 1-2 mm are formed in the spraying pipe at intervals of 2-4 cm, and the spraying holes are preferably located on the same straight line. The shape of the spray pipe, the design of the opening gap and the spray holes are related to the viscosity of the water-soluble adhesive, and in the conical pipe, the aperture can improve the adhesion rate of the adhesive on the inorganic fiber and the distribution uniformity of the adhesive on the premise of reducing the blockage of the spray holes by the water-soluble adhesive; if the diameter of the spray holes is small and is less than the minimum value of the above range, the water-soluble adhesive with viscosity in the present invention easily blocks the spray holes; if the diameter of the spray holes is large and is higher than the maximum value of the above range, the size of the adhesive droplets sprayed is large, and the adhesive is difficult to adhere to the inorganic fibers. If the pore-opening gap is too small and is lower than the minimum value of the range, the spraying amount of the adhesive in unit area is obviously increased, and the content of the adhesive in the product exceeds the standard; if the hole gap is too large and is higher than the maximum value of the above range, the spray uniformity is not high. For the shape of the spray pipe, a conical pipe, particularly the conical pipe with the taper is adopted, the spray holes on the spray pipe can be designed into through holes with the same size, if a round pipe with the consistent cross section is adopted, the size of the spray holes needs to be adjusted section by section in the conveying direction, and the design and processing of the spray pipe are more complicated.

In the invention, the spray pipe is made of polymer materials such as polyvinyl chloride (PVC) and the like, and metal materials are not selected. Burrs cannot be generated on the hole wall after the polymer material pipe is mechanically punched, burrs can be generated on the hole wall after the metal pipe is mechanically punched, and then the spraying hole is blocked by hanging glue.

Furthermore, the spray pipe is fixed on the rigid retaining piece, the material conveying belt is positioned below the spray pipe, the spray holes of the spray pipe face downwards, and the spray pipe sprays to the materials in the material conveying process. The rigid retaining piece is bundled with the spray pipe to keep the shape of the spray pipe, so that the uniformity and the fluency of spraying are ensured, and the problems of product quality caused by blockage of a spray opening of the pipe, inconsistent spray flow and the like are avoided.

In the invention, a heating device is arranged in the storage tank, and the temperature of the water-soluble adhesive in the storage tank is kept within the temperature range with the highest activity, such as 35-45 ℃.

Furthermore, a stirring device is arranged in the storage tank, so that the state of the water-soluble adhesive in the storage tank is kept uniform, and no precipitate is generated.

In the invention, the servo pipe is externally wrapped with the heat-insulating layer so as to be beneficial to heat insulation and flow of materials in the servo pipe.

In the glue extruding process, the adopted equipment is a glue extruding roller, the glue content is controlled by adjusting the extruding force and the like, and the glue is conveyed to the next procedure through a conveying belt. The extrusion process is used for removing excessive glue solution contained in the fibers on the premise of ensuring the effective glue content, and the efficient implementation of the curing and forming process is facilitated.

In the curing and forming process, the adopted equipment is microwave curing equipment, the traditional drying room is used as the microwave curing equipment by improving the curing device, the rapid curing of the low-thermal-conductivity material is realized, the product can be stably produced in batches, and the heat-insulating property and the mechanical property of the obtained product are far higher than the national standard. The microwave curing equipment activates polar molecules in the water-soluble adhesive by microwaves, and the polar molecules vibrate at a high speed, so that the activity of the molecules is greatly excited, and the insulation board with stable mechanical property can be obtained without adding other coupling agents or curing agents for improving the binding force among the components.

The microwave curing equipment comprises a microwave unit, a conveyor belt unit, an air outlet system and a hot air system, wherein the microwave unit is of a cavity structure, the conveyor belt unit bears materials sprayed with water-soluble adhesive and enters a cavity of the microwave unit, and the microwave unit heats and cures the adhesive by microwaves. Specifically, the heating element of the microwave unit is a magnetron 101, and the magnetron 101 is installed at the top of the inner cavity of the microwave unit and used for heating materials passing through the lower part of the magnetron 101 in a microwave manner; the air outlet system is communicated with the microwave unit, steam generated by microwave heating is discharged to the hot air system through the air outlet pipeline, and hot air generated after combustion is returned to the microwave unit after the steam is combusted by the hot air system.

As shown in fig. 6, the microwave unit is divided into a preheating zone, a curing zone and a post-treatment zone, wherein the magnetron power in the preheating zone accounts for 2/5-3/5 (preferably 1/2) of the total power, the magnetron power in the curing zone accounts for 3/10-1/2 (preferably 2/5) of the total power, and the magnetron power in the post-treatment zone accounts for 1/10 of the total power; wherein, the preheating zone plays a role of drying materials, heating the inorganic fiber and the water-soluble adhesive and evaporating water vapor; in the curing zone, the water-soluble adhesive coated among the inorganic fibers realizes adhesion and curing, and the surface of the material has viscosity; in the post-treatment area, the curing degree of the adhesive can reach more than 98 percent by further heating, and the stability of the heat-insulating material is enhanced. Power partitioning is carried out according to the characteristics of the product, so that the effect similar to that of fiber boiling in warm water caused by slow temperature rise in a preheating zone is avoided on the premise of average power distribution, the material cannot be dried in time, and finally solidification is not finished, so that the product performance is poor; the power is divided according to the characteristics of the product, and the risks of high temperature of a post-processing area, oxidation of the adhesive and fire on the premise of average power distribution are avoided.

The microwave unit is provided with a plurality of air outlets 102, and each air outlet 102 is communicated with an air outlet pipeline of the air outlet system and used for discharging steam generated by microwave heating. The setting of air outlet satisfies that preheating zone air-out flow is not less than 3/5 of total air-out flow, solidification zone air-out flow is not less than 3/20 of total air-out flow when equipment is worked, and the aftertreatment district does not have the air-out flow, but the aftertreatment district sets up at least one air outlet, and the air outlet of aftertreatment district is closed completely when equipment is worked, does not have the air-out flow, but in order to guarantee production safety, in time dispel the heat when the circumstances such as material burning takes place, the aftertreatment district reserves the air outlet. Further, the air outlets 102 in each zone are of the same size, and the air outlets 102 in each zone are evenly distributed. The distribution of the air outlet/air outlet flow avoids that the steam in the preheating area, which is caused by the average distribution of the air outlet/air outlet flow, cannot be quickly discharged, is condensed on the ceiling of the cavity of the equipment and drops on the surface of the material to cause surface 'mottling'; the waste of hot gas in a curing area is avoided, and the energy utilization rate is improved; the waste of hot air inlet when a hot air system is added in the post-treatment area is avoided, and the energy utilization rate is improved.

The inventor discovers in production that the use of microwave has the phenomenon that the whole heated board is out of shape, warped, and then confirms, installs at least one compression roller 104 in the microwave unit, and compression roller 104 exerts pressure to the material that bears on the conveyer belt unit, and the roughness of heated board product after the solidification can be guaranteed to the suppression through the compression roller, and the material is out of shape when avoiding high temperature curing and leads to the heated board surface unevenness that takes shape.

Further, the press roll 104 is installed at the end of the preheating zone and/or the initial stage of the curing zone. The installation position of the press rolls is very relevant for the shaping of the product material, and contact pressure is applied at the end of the preheating zone and/or at the beginning of the curing zone.

In the invention, the conveyor belt unit comprises a conveyor belt 201, the conveyor belt 201 is driven by gears 202 positioned at two ends of the microwave unit, and grooves are processed at the bottom of the conveyor belt 201 and are matched with teeth on the gears 202.

Further, the gear 202 is driven by a servo motor, and the servo motor drives the gear 202 to rotate by monitoring the feeding speed, so that the speed of the conveyor belt is the same as the feeding speed.

Further, a support roller 203 is installed at a lower portion of the conveyor belt 201 at an interval, and the support roller 203 is in contact with a rear surface of the conveyor belt 201 to position the entire conveyor belt 201 at a desired height. The support roller 203 is a passive roller, and is driven by the conveyor belt to rotate, so that the conveyor belt speed is not interfered.

In the invention, the hot air system of the microwave curing equipment comprises an incinerator (preferably an RTO incinerator) and a hot air compensation pipeline, steam discharged by a microwave unit carries unreacted phenol/aldehyde organic matters to enter the incinerator for combustion, and hot air generated by combustion of the incinerator enters the microwave unit from a post-treatment area through a hot air inlet 103 on the post-treatment area to realize thermal compensation. In the curing zone, the polar substance adhesive in the material basically finishes reaction, in order to realize continuous curing and improve the stability of the product, the microwave power required by the post-treatment zone must be increased, but the action time needs to be very short, so that the microwave heating is extremely difficult to control, the temperature rises by hundreds of degrees instantaneously, the material and equipment are easy to burn, and the production accident is caused. Therefore, through research and development, it is determined that high-power microwaves are not used in a post-treatment area, a hot air system and microwaves are combined initially, and after the temperature is stable, the hot air system is only used for further curing the adhesive. The hot air system/thermal compensation function realizes zero pollution of the microwave curing equipment, and simultaneously recycles combustion hot air to return to the rear end of the microwave unit, thereby ensuring accurate control of the working procedure and production safety. The compensation flow of the hot air system is related to the productivity and the total power and is not less than the air outlet flow of the curing area.

The inventor discovers in production, adopt current RTO incinerator can not satisfy the hot-blast compensation demand of continuous stability completely, the reason lies in carrying a large amount of steam by microwave unit exhaust steam, steam is condensed by waste gas import 301 entering RTO incinerator back steam, the siltation can't in time effectively discharge in exhaust duct 302, water siltation blocks up exhaust duct 302 after serious, can't make follow-up steam get into regenerator 303 heat transfer, and then can't get into furnace 304 burning and produce the flue gas and supply to microwave unit, only can start production after the equipment stall drainage, cause assembly line production not to be consistent, reduce production efficiency. To this end, the inventor modified the existing equipment to add a self-draining device to the exhaust pipe 302 at the end of the exhaust inlet 301. The self-draining device comprises an S-shaped drain pipe 305, one end of the drain pipe 305 is communicated with the waste gas pipeline 302, and water accumulated in the waste gas pipeline 302 enters the drain pipe 305 and is discharged from the opening at the other end of the drain pipe, as shown in FIG. 7. Due to the S-shaped design of the drain pipe and the water sealing function of the water reserved in the pipeline, the steam entering the incinerator cannot overflow from the incinerator except the condensed water.

In the invention, the microwave curing equipment also comprises a humidity monitoring system and a temperature monitoring system, wherein the humidity monitoring system comprises humidity sensors distributed in each area of the microwave unit, the temperature monitoring system comprises temperature sensors distributed in each area of the microwave unit, the temperature sensors and the humidity sensors respectively monitor the temperature and the humidity in each area of the microwave unit, through information feedback, an operator can master the internal condition of the equipment in the curing process and can make corresponding adjustment, when the temperature and the humidity in the microwave unit do not change any more, the specific temperature and humidity balance state of the equipment is established, subsequent materials enter the microwave unit without adjusting microwave curing parameters, and the temperature and humidity balance state can be the basis of batch production of chemical lattice products.

In the present invention, when the microwave curing apparatus is used to perform the curing and molding process, the following steps may be adopted:

step 1, determining the power of each area of microwave curing equipment, the flow distribution and setting of an air outlet, the heat energy compensation amount and the speed of a conveyor belt according to the capacity;

the relation between the width dimension of the inner cavity of the microwave curing equipment and the productivity is as follows: the productivity is equal to the conveying speed of the microwave curing equipment multiplied by the allowable effective width of the microwave curing equipment multiplied by the time multiplied by the qualification rate (when the processing capacity of a single equipment is considered, the qualification rate can be temporarily considered to be 100 percent) formula 1;

the microwave power of each zone x the microwave working time of each zone is equal to the composite material total water weight heavy evaporation energy-composite material total adhesive polymerization energy + air outlet heat-hot gas compensation energy + microwave curing equipment cavity heat loss formula 2.

In the formula 2, the left side and the right side of the equation are time functions, the heat loss of the cavity of the microwave curing equipment can be approximately time constants (in a balanced state, the heat exchange between an internal constant temperature field and an external normal temperature field is constant), and the power of each area, the flow distribution and setting of the air outlet, the heat energy compensation amount and the speed of the conveyor belt can be obtained through modeling analysis.

Step 2, in the starting stage of the microwave curing equipment, microwaves of all areas are started along with the material process; after the materials pass through the preheating zone, opening an air outlet system, and after the materials pass through the curing zone, opening a hot air system; wherein the magnetron power in the preheating zone accounts for 2/5-3/5 (preferably 1/2) of the total power, the magnetron power in the curing zone accounts for 3/10-1/2 (preferably 2/5) of the total power, and the magnetron power in the post-treatment zone accounts for 1/10 of the total power; the air outlet flow in the preheating zone is not lower than 3/5 of the total air outlet flow, the air outlet flow in the curing zone is not lower than 3/20 of the total air outlet flow, and the air outlet flow in the post-treatment zone is not higher than;

and 3, discharging the material out of the microwave curing equipment, establishing thermal environment balance by the microwave curing equipment, and then carrying out magnetron shutdown adjustment according to the power subareas. Specifically, the power of the preheating zone 1/5-1/4 is closed, and the whole power of the post-treatment zone is closed.

After the thermal environment is balanced, the temperature of the curing area is controlled to be 110 +/-5 ℃ and normally and continuously operated, and the alarm is given out when the temperature is lower than 100 ℃ or higher than 120 ℃. Experience shows that the temperature is 110 +/-5 ℃, and the insulation board can obtain the best performance index.

In the invention, in order to obtain the insulation board with improved insulation performance and impact resistance, the curing and forming process further comprises a secondary curing process.

Specifically, air cooling is carried out after primary curing, the temperature is reduced to below 70 ℃, and the mixture enters constant-temperature heating equipment again and is heated for secondary curing. If the product directly enters a constant temperature heating device for secondary curing without air cooling, the product may be burnt due to the large heat accumulated.

Further, the secondary curing equipment can adopt microwave curing equipment with the same power distribution as that of the primary curing or a heating furnace or a drying room which can be used for a production line, if the microwave curing equipment is adopted, all magnetrons of the microwave curing equipment are started, and the microwaves enter the microwave curing equipment at the speed which is 3-3.5 times of the advancing speed of the primary curing; if a heating furnace or a drying room is adopted, the secondary curing is carried out for 20-50 min at 160-265 ℃. In the secondary curing process, the molecules in the product are excited by energy again to react to generate a relatively compact carbonized layer, so that the heat insulation performance, the tensile strength, the compressive strength and the impact resistance of the product are greatly improved.

Examples

The raw material sources of the embodiment of the invention are as follows: the alkali-free glass fiber is purchased from Taishan glass fiber, type short-cut electronic sand; the medium alkali glass fiber is purchased from Taishan glass fiber, and the type is directly wound with sand; water soluble phenolic resins were purchased from tel chemical, model P725271M.

Example 1

A production line for insulation boards of building outer walls comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing forming. The insulation board comprises the following raw materials: glass fiber and water-soluble phenolic resin, wherein the glass fiber is prepared: 4860kg of alkali-free glass fiber, 14580kg of medium alkali glass fiber, 10 μm in filament diameter and 75mm in length. 3240kg of water-soluble phenolic resin stock, viscosity of 13cp at 25 ℃, 49 wt% of solid content and pH 10.0.

The glass fiber reaches a spraying machine (spraying water-soluble resin with the amount of 99kg/h), a microwave curing device for primary curing and a microwave curing device for secondary curing through an automatic feeding machine (feeding 122kg of alkali-free glass fiber and 365kg of medium alkali glass fiber per hour), a bale opener, an opener, a carding machine, a lapping machine, a needle machine and a conveyor, and a novel fireproof heat-insulation board with the width of 2m, the thickness of 28mm and the length of 30m is prepared after 1 hour, and the novel fireproof heat-insulation board is non-combustible at A1 level and is non-toxic at AQ2 level. Specific performance data are shown in table 1 below.

TABLE 1 Performance data

Wherein, a bridge-shaped magnet frame is fixedly arranged at the 2/3 height position on the side wall of the opening chamber of the opener.

Wherein, the length of the roller in the feeding roller 401 and the carding roller combination 402 of the carding machine is 2500mm, the roller shaft of the feeding roller 401 is connected with the conducting wire of the static removing device, and the other end of the conducting wire extends into the ground to be connected with a copper bar; wherein the diameter of the copper rod is phi 50mm, the length of the copper rod is 500mm, and the buried depth of the copper rod is 2000 mm. The feed roll 401 and carding roll combination 402 of the carding machine are dusted with thin talc powder to avoid the rollers sticking fibers.

Wherein the length of the roller in the lapping machine is 2500mm, and the fall between the trolley 503 and the bottom curtain 504 is increased to 2.2 m. An atomization device is arranged above a conveyor belt 501 of the lapping machine, and an electrostatic remover is sprayed into air above the atomization device through an atomization nozzle 505 of the atomization device, so that the electrostatic generation of fibers is reduced.

Wherein, the spray pipe is 2.5m long, the PVC pipe with 0.5 degree taper angle, the inner diameter of the glue inlet end (big opening end) is 35mm, and 1mm spray holes are arranged on the lower edge at intervals of 2 cm;

wherein, the box body of the microwave curing equipment for primary curing is 40 multiplied by 2.4 multiplied by 1.6m, and the allowable effective width of the inner cavity is 2.1 m; the total power of the equipment is 440kW, the preheating area is 220kW, the curing area is 176kW, and the post-treatment area is 44 kW; starting the microwave curing equipment, and starting the microwaves of all areas along with the material process; the speed of the conveyor belt is 0.31m/min, and when the materials pass through the preheating zone, the air outlet system is opened, and the total air outlet flow is 5000m³H, the air outlet flow of the preheating zone is 3500m³H, the air outlet flow of the solidification area is 1500m³H; after the material passes through the curing area, a hot air system is opened, hot air is at 200-220 ℃, and the hot air flow is 1200m³H; after the material head is discharged from the equipment, the power of the preheating zone 1/4 is closed, the whole power of the post-treatment zone is closed, and the relative steady state of reaction balance is established in the furnace.

And air cooling is carried out after the primary curing, the temperature is reduced to 70 ℃, the mixture enters microwave curing equipment for secondary curing, and the secondary curing is carried out at the full power when the microwave power is the primary curing and the advancing speed of the secondary curing is 3.5 times that of the primary curing.

The invention has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to be construed in a limiting sense. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the technical solution of the present invention and its embodiments without departing from the spirit and scope of the present invention, which fall within the scope of the present invention. The scope of the invention is defined by the appended claims.

Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.

Claims

1. A production line of insulation boards is characterized in that the production line takes inorganic fibers and water-soluble adhesives as raw materials to produce the insulation boards, and comprises the working procedures of feeding, unpacking, opening, carding, lapping, needling, cutting, spraying, glue extruding and curing forming, wherein the feeding working procedure implements grabbing and feeding of the inorganic fibers; the unpacking and opening process is used for unpacking and opening the fibers sent from the preorder through the conveying belt; carding the fibers subjected to opening treatment by a carding procedure, and transmitting the fibers to a lapping procedure; the lapping procedure receives the carded fibers and uniformly lays the fibers into a plurality of fiber layers; the needling process compresses the fiber layer by using a needling process; the cutting procedure is used for cutting burrs at two ends of the needle punched material in the width direction and entering the spraying procedure through a conveying belt; the spraying procedure sprays and distributes the water-soluble adhesive on the inorganic fiber; the glue squeezing process squeezes the glue-containing fiber to control the glue content in the fiber; in the curing and forming process, microwave curing equipment is adopted, the adhesive is cured by directly acting microwaves on the material, waste gas generated in curing is pumped away, hot gas generated after the waste gas is combusted is refluxed and compensated into the microwave curing equipment, the heat balance in the microwave curing equipment is achieved, and the product is cured and formed;

the microwave curing equipment comprises a microwave unit, a conveyor belt unit, an air outlet system and a hot air system, wherein the microwave unit is provided with a cavity structure, the conveyor belt unit bears materials sprayed with the water-soluble adhesive and enters the cavity of the microwave unit, and the microwave unit heats and cures the water-soluble adhesive through microwaves; the air outlet system is communicated with the microwave unit, steam generated by microwave heating is discharged to the hot air system through an air outlet pipeline, and after the hot air system burns the steam, hot air generated after burning is returned to the microwave unit;

the top of the inner cavity of the microwave unit is provided with a magnetron (101) for microwave heating of materials passing below the magnetron (101); the microwave unit is divided into a preheating area, a curing area and a post-processing area, wherein the power of a magnetron in the preheating area accounts for 2/5-3/5 of the total power, the material is dried, the power of the magnetron in the curing area accounts for 3/10-1/2 of the total power, the water-soluble adhesive is heated and cured, the power of the magnetron in the post-processing area accounts for 1/10 of the total power, and the heating and curing are continuously carried out.

2. The production line of the insulation board according to claim 1, wherein a magnetic attraction piece is installed in an equipment opener adopted in the opening process to adsorb and remove ferrous metal impurities in the fibers.

3. The insulation board production line according to claim 2, characterized in that the opener comprises a fan (601), a fan pipeline (602), an opening chamber (603), a magnet (604) fixed on the wall surface of the opening chamber (603), and a conveyor belt below the magnet, the fan (601) sends the fibers into the upward fan pipeline (602), the fibers enter the opening chamber (603) from an inlet at the top of the opening chamber (603), the fibers are loosened in the descending process, the metal impurities in the fibers are separated from the fibers in the descending process and are magnetically attracted by the magnet (604) to remove the impurities, and the conveyor belt receives the fallen fibers and conveys the fibers to the carding process.

4. The insulation board production line of claim 3, wherein the opener is provided with a photoelectric relay for monitoring the noil height on the conveyor belt below the magnet, and the cotton storage amount in the opener is measured through the noil height.

5. The production line of insulation boards according to claim 1, characterized in that in the carding process, the equipment used is a carding machine; in the lapping process, adopted equipment is a lapping machine,

the carding machine comprises a feeding roller (401) and a carding roller combination (402), wherein the feeding roller (401) sends fibers into the carding roller combination (402) to carry out fiber carding, and the length of the rollers in the feeding roller (401) and the carding roller combination (402) is 2450-3000 mm; the lapping machine comprises a conveyor belt (501), a guide-in roller (502), a trolley (503) and a bottom curtain (504), fibers on the conveyor belt (501) are conveyed to the trolley (503) through the guide-in roller (502), the trolley (503) reciprocates above the bottom curtain (504), conveyed fibers are paved into a fiber layer on the bottom curtain (504), the fiber layer is taken out of the lapping machine by the bottom curtain (504), the reciprocating direction of the trolley (503) is perpendicular to the advancing direction of the bottom curtain (504), and the lengths of rollers in the guide-in roller (502) and the trolley (503) are not lower than that of rollers in a carding machine.

6. The insulation board production line according to claim 5, wherein a roller shaft of a feeding roller (401) in the carding machine is connected with a static removing device, the static removing device comprises a conducting wire (403) and a metal rod (404), one end of the conducting wire (403) is connected with the roller shaft of the feeding roller (401), the other end of the conducting wire extends into the ground to be connected with the metal rod (404), and the metal rod (404) is located underground and guides static electricity transmitted by the conducting wire (403) into the ground.

7. The insulation board production line according to claim 5, wherein talc powder is spread on the feeding roller (401) and the carding roller combination (402) of the carding machine.

8. The production line of the heat insulation boards as claimed in claim 5, wherein the height of the fall between the trolley (503) and the bottom curtain (504) in the lapping machine is 1.0-2.5 m.

9. The insulation board production line according to claim 5, wherein the lapping machine is connected with a static removing device, the static removing device comprises a conducting wire and a metal rod, one end of the conducting wire is connected with a roller shaft of any roller in the trolley (503), the other end of the conducting wire extends into the ground to be connected with the metal rod, and the metal rod is located underground and guides static transmitted by the conducting wire into the ground.

10. The production line of the heat insulation boards according to claim 5, wherein an atomization device is installed above a conveyor belt (501) of the lapping machine, the atomization device comprises a conveying pipeline and an atomization nozzle (505), the conveying pipeline supplies the antistatic agent to the atomization nozzle (505), and the atomization direction of the atomization nozzle (505) is upward, so that the antistatic agent is diffused into the air.

11. The insulation board production line according to claim 5, characterized in that a cotton pressing roller (506) is installed in front of the conveying direction of the bottom curtain (504) of the lapping machine, the height between the cotton pressing roller (506) and the bottom curtain (504) is lower than the height of the laid fiber layer, and the cotton pressing roller (506) presses the fiber layer.

12. The insulation board production line according to claim 1, wherein the needling process comprises a pre-needling process and a main needling process, the adopted equipment is a needling machine, an auxiliary clamping port is additionally arranged at the inlet of the needling machine in the pre-needling process, the auxiliary clamping port is of a horn mouth structure, the large mouth end faces the incoming material direction, and the small mouth end is connected with the inlet of the needling machine.

13. The production line of the insulation board according to claim 1, wherein the spraying device in the spraying process is a pipeline type spraying device, the pipeline type spraying device comprises a storage tank, a servo pipe and a spraying pipe, the storage tank is filled with water-soluble adhesive and is conveyed to the spraying pipe through the servo pipe, wherein,

the spraying pipe is a conical pipe, and spraying holes with the diameter of 1-2 mm are formed in the spraying pipe at intervals of 2-4 cm.

14. The insulation board production line of claim 13, wherein the spray pipe is fixed to the rigid holder, the material conveyor is located below the spray pipe, and the spray holes of the spray pipe face downward and spray onto the material during the material conveying process.

15. The insulation board production line of claim 13, wherein a heating device is arranged in the storage tank; and/or

And a stirring device is arranged in the storage tank.

16. The production line of insulation boards according to claim 1, wherein a plurality of air outlets (102) are arranged in the microwave unit, and each air outlet is communicated with an air outlet pipeline of the air outlet system; the arrangement of the air outlet (102) meets the requirements that the air outlet flow of the preheating area is not lower than 3/5 of the total air outlet flow, the air outlet flow of the curing area is not lower than 3/20 of the total air outlet flow, the post-processing area has no air outlet flow, and the post-processing area is provided with at least one air outlet.

17. The production line of the heat insulation board as claimed in claim 1, wherein the conveyor belt unit comprises a conveyor belt (201), support rollers (203) are installed at intervals at the lower part of the conveyor belt (201), and the support rollers (203) are in contact with the back surface of the conveyor belt (201) to enable the whole conveyor belt (201) to be located at a required height.

18. The insulation board production line according to claim 1, wherein the hot air system comprises an RTO incinerator and a hot air compensation pipeline, the steam discharged from the microwave unit is burnt in the incinerator with organic matters, and hot air generated by burning in the incinerator enters the microwave unit from the post-treatment area through a hot air inlet (103) on the post-treatment area.

19. The insulation board production line according to claim 18, wherein the RTO incinerator comprises an exhaust gas inlet (301) and an exhaust gas pipeline (302), the steam discharged by the microwave unit carries organic matters to enter the exhaust gas pipeline (302) from the exhaust gas inlet (301), and a self-draining device is installed on the exhaust gas pipeline (302) at the end of the exhaust gas inlet (301);

the self-draining device comprises an S-shaped drain pipe (305), one end of the drain pipe (305) is communicated with an exhaust gas pipeline (302), and water accumulated in the exhaust gas pipeline (302) enters the drain pipe (305) and is discharged from the opening at the other end of the drain pipe.

20. The insulation board production line of claim 1, wherein the microwave curing apparatus further comprises a humidity monitoring system and a temperature monitoring system, the humidity monitoring system comprises humidity sensors distributed in each zone of the microwave unit, the temperature monitoring system comprises temperature sensors distributed in each zone of the microwave unit, and the temperature sensors and the humidity sensors respectively monitor the temperature and the humidity in each zone of the microwave unit.

21. The insulation board production line according to any one of claims 15 to 20, wherein the curing molding process comprises the steps of:

step 2, in the starting stage of the microwave curing equipment, microwaves of all areas are started along with the material process; after the materials pass through the preheating zone, opening an air outlet system, and after the materials pass through the curing zone, opening a hot air system; wherein the power of the magnetron in the preheating zone accounts for 2/5-3/5 of the total power, the power of the magnetron in the curing zone accounts for 3/10-1/2 of the total power, and the power of the magnetron in the post-processing zone accounts for 1/10 of the total power; the air outlet flow in the preheating zone is not lower than 3/5 of the total air outlet flow, the air outlet flow in the curing zone is not lower than 3/20 of the total air outlet flow, and the air outlet flow in the post-treatment zone is not higher than;

and 3, after the material is discharged from the microwave curing equipment and the microwave curing equipment establishes thermal environment balance, carrying out magnetron shutdown adjustment according to power partitions, wherein power of the preheating zone 1/5-1/4 is shut down, and all power of the post-processing zone is shut down.

22. The insulation board production line of claim 1, wherein the curing molding process further comprises a secondary curing process;

and air cooling after primary curing, cooling to below 70 ℃, and heating in constant-temperature heating equipment again for secondary curing.

23. The insulation board production line of claim 22, wherein the secondary curing equipment adopts microwave curing equipment with the same power distribution as that of the primary curing, or adopts a heating furnace or a drying room for the production line, if the microwave curing equipment is adopted, all magnetrons of the microwave curing equipment are started, and the microwave curing equipment enters the microwave curing equipment at a speed 3-3.5 times of the travelling speed of the primary curing; if a heating furnace or a drying room is adopted, the secondary curing is carried out for 20-50 min at 160-265 ℃.