Space-saving rock wool production line

Abstract

The invention discloses a space-saving rock wool production line which comprises a wool collecting drum, a pressing machine and a curing oven, an exhaust port of the wool collecting drum is connected with an exhaust pipeline, a sealing box is arranged outside the pressing machine, an air inlet pipe communicated with the exhaust pipeline is arranged at the top of the sealing box, and a main hot air inlet pipe parallel to the length direction of the curing oven is arranged on one side of the curing oven. The lower side portion of the sealing box is connected with a front port of a main hot air inlet pipe through an air inducing pipe, the main hot air inlet pipe is connected with the lower portion of the curing oven through a plurality of branch hot air inlet pipes, the upper portion of the curing oven is connected with an air outlet pipeline, and an outlet of the air outlet pipeline is connected with an exhaust fan. High-temperature waste gas generated in a rock wool production line is directly injected into the curing furnace, high-temperature airflow dries and cures rock wool, meanwhile, a binder in a rock wool board adsorbs dust carried in the airflow, the rock wool board plays a role of a filter in the curing process, energy consumption is reduced, the cost is saved, and the production efficiency is improved. And a large amount of dust filtering equipment and occupied area are reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of thermal insulation material production, and particularly relates to a space-saving rock wool production line. BACKGROUND

[0002] The rock wool production line is an industrial production system composed of multiple special-purpose equipment, and is mainly used for processing basalt and other raw materials into building thermal insulation materials, i.e., rock wool boards. The rock wool board, also known as a rock wool thermal insulation decorative board, is an artificial inorganic fiber processed by high-temperature melting, and has the characteristics of light weight, small thermal conductivity, heat absorption and non-combustibility. The rock wool board is widely used in building decoration, and the rock wool is applied in many industries due to its excellent fireproof properties and recognized energy-saving characteristics.

[0003] The core processes of the rock wool production line include high-temperature melting, centrifugal fiberization, cotton collecting cloth, solidification and molding, etc. At present, in the centrifugal fiberization process, the dust generated by the negative pressure extraction of the cotton collecting drum is sequentially passed through a first filter chamber, a washing + wet type electric dust collection tower, a wet exhaust fan and a second filter chamber. In the solidification and molding process, a set of air blower is usually used to send the hot air generated by the natural gas furnace into the solidification furnace to perform hot air solidification on the rock wool board in the solidification furnace. The exhaust gas of the solidification furnace still needs to be purified by the second filter chamber before being discharged into the atmosphere. In the above two processes, the gas flow generated in the cotton collecting drum still has a high temperature, which is not utilized but only removed, resulting in a large amount of heat energy loss. In addition, a large amount of natural gas is consumed for the solidification of the rock wool board in the solidification furnace, greatly increasing the production cost. In addition, the existing rock wool production line uses a large number of equipment, occupies a large area and increases the investment cost. Therefore, it is urgent to improve the existing rock wool production line. SUMMARY

[0004] In order to solve the above technical problems, the application provides a space-saving rock wool production line with small occupied area, low cost, full utilization of the heat energy of the gas flow extracted from the cotton collecting drum and greatly reduced energy consumption.

[0005] To solve the above technical problems, the application adopts the following technical scheme: a space-saving rock wool production line, which comprises, from front to back, a plasma furnace, a centrifuge, a cotton collecting drum, a pendulum cotton distributor, a pleating machine, a pressing machine and a curing furnace, the exhaust port of the cotton collecting drum is connected with an exhaust pipeline, the curing furnace is internally provided with an upper track and a lower track for clamping and moving the rock wool board rearward, the rock wool board divides the curing furnace into an upper sealed chamber and a lower sealed chamber, the pressing machine is externally provided with a sealing box, the top of the sealing box is provided with an air inlet pipe in communication with the exhaust pipeline, one side of the curing furnace is provided with a main hot air inlet pipe parallel to the length direction of the curing furnace, the lower side of the sealing box is connected with the front end port of the main hot air inlet pipe through an air guide pipe, the rear end port of the main hot air inlet pipe is blocked, the main hot air inlet pipe is connected with the lower sealed chamber of the lower part of the curing furnace through a plurality of branch hot air inlet pipes, the upper sealed chamber of the upper part of the curing furnace is connected with an air outlet pipeline, the air outlet pipeline is connected with an air extraction pipeline, and the outlet of the air extraction pipeline is connected with an air extractor.

[0006] The air extraction pipeline is provided with a filtering device.

[0007] The top of the front end and the top of the rear end of the curing furnace are respectively provided with a front air outlet and a rear air outlet, both in communication with the upper sealed chamber, and the front and rear air outlets are connected with the front and rear ports of the air outlet pipeline.

[0008] The lower side of the curing furnace is provided with hot air inlets corresponding to the branch hot air inlet pipes along the length direction.

[0009] The front side wall and the rear side wall in the sealing box are both provided with guide rails, and a horizontal pull-out type filter screen plate located below the rock wool product is slidably arranged on the two guide rails, and the lower part of the left side or the right side of the sealing box is provided with an access door for replacing the filter screen plate.

[0010] The production process flow comprises the following steps: S1, raw material preparation: the main raw material of the rock wool board is basalt slag, and slag, dolomite and coke auxiliary materials are added, and each raw material needs to be accurately proportioned according to a certain proportion; S2, melting treatment: the prepared raw materials are sent into the plasma furnace for sufficient melting; S3, centrifugal spinning: the melted raw materials pass through a high-speed centrifuge to form fine inorganic cotton filaments; S4, the cotton collecting drum converts high-temperature fibers into primary cotton felt with stable structure, and a high-speed air blower cools the inorganic cotton filaments to make them quickly form; high-temperature waste gas is discharged through the exhaust pipeline; S5, the pendulum cotton distributor increases the density and hardness of the inorganic cotton; S6, the pleating machine mechanically folds to make the rock wool fibers form a three-dimensional network; S7. Rock wool boards with a porous honeycomb structure and breathable top and bottom are formed by the pressing machine. At the same time, high-temperature exhaust gas in the exhaust pipe enters the sealed box through the air inlet pipe, heating the rock wool product being pressed by the press. During the pressing process, the bottom surface of the rock wool product has multiple support rollers, and the upper surface of the rock wool product is in full contact with the high-temperature exhaust gas. Since the rock wool product is not yet cured at this time, the internal pores are larger and there is more binder, so when it passes through the rock wool product from top to bottom, a large amount of dust carried by the high-temperature exhaust gas is adsorbed by the binder on the rock wool product. Then the high-temperature exhaust gas passes downward through the filter screen. The filter screen is designed to prevent the cotton fibers being pressed from being blown downward. Then the high-temperature exhaust gas enters the main hot air inlet pipe through the air duct at the bottom of the sealed box. S8. The rock wool board is conveyed to the curing oven for foaming and curing. The shaped rock wool material is then dried at high temperature to remove internal moisture and increase its stability. S9. During the process of the rock wool board moving from front to back in the curing oven, the exhaust fan draws air from the upper sealed chamber of the curing oven. The high-temperature exhaust gas in the sealed box enters the main hot air inlet pipe through the exhaust pipe, and then enters the lower sealed chamber of the curing oven through several hot air inlet pipes. Because the fibers naturally form a three-dimensional porous network when they are pleated, the gas can pass through the three-dimensional porous network, i.e., a large number of tiny pores, during the curing process in the curing oven. The pores are connected by fiber bridges. The high-temperature airflow dries the rock wool board at high temperature. At the same time, the dust carried in the airflow is adsorbed by the binder inside the rock wool board. The rock wool board continuously filters the dust in the airflow during the airflow process. The filtered air enters the upper sealed chamber and is then discharged through the exhaust pipe and exhaust pipe. After final filtration by the filtration device, it meets the emission requirements and is discharged into the atmosphere.

[0011] Compared with the prior art, the present invention has the following advantages by adopting the above technical solution: This invention is based on a scientific principle. The high-temperature waste gas generated in the rock wool production line first enters a sealed box added outside the pressing machine. Inside this box, the rock wool products being pressed are baked, and simultaneously, dust and loose cotton fibers in the high-temperature waste gas adhere to the rock wool products, increasing their density. The high-temperature waste gas is then injected into a curing furnace. Because the temperature of the high-temperature waste gas is lower than that of air heated by natural gas combustion, the length of the curing furnace can be appropriately increased to improve the curing effect on the rock wool boards, thus extending the curing time. Inside the curing furnace, the high-temperature waste gas passes from top to bottom through the rock wool boards with a three-dimensional porous network. While the high-temperature airflow dries and cures the rock wool, the binder inside the rock wool boards adsorbs the dust carried in the airflow. During the curing process, the rock wool boards act as filters, utilizing waste heat energy while simultaneously filtering the waste gas—a two-in-one benefit. This reduces energy consumption, saves costs, and reduces the need for equipment such as the first filtration chamber, washing + wet electrostatic precipitator, exhaust fan, and second filtration chamber, thus reducing the floor space required and saving workshop space. This invention has extremely high economic value and promotional significance.

[0012] High-temperature exhaust gas enters from the top of the sealed box, passes through the rock wool product undergoing pressurization, and then exits from the bottom of the sealed box. Compared with the method of high-temperature exhaust gas entering from the bottom of the sealed box and exiting from the top, this method of air intake and exhaust has the following advantages: Since there are several support rollers at the bottom of the rock wool product, when air is intake from the top, the high-temperature exhaust gas comes into contact with a larger area of ​​the rock wool product; when air is intake from the bottom, the rock wool product is blocked by the support rollers, and the area where the high-temperature exhaust gas can pass through is smaller. Therefore, air intake from top to bottom has better dust collection and preheating curing effects. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the planar layout of the present invention; Figure 2 This is a schematic diagram of the elevation structure of the present invention; Figure 3 This is a schematic diagram of the external structure of the sealed box; Figure 4 Schematic diagram of the internal structure of the sealing box. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] like Figures 1-4 As shown, a space-saving rock wool production line includes, from front to back, a plasma furnace 1, a centrifuge 2, a cotton collecting drum 3, a pendulum cotton spreading machine 4, a pleating machine 5, a pressing machine 6, and a curing furnace 7. The exhaust port of the cotton collecting drum 3 is connected to an exhaust pipe 8. The curing furnace 7 has an upper and lower track for clamping and moving rock wool boards 9 backwards. The rock wool boards 9 divide the interior of the curing furnace 7 into an upper sealed chamber 10 and a lower sealed chamber 11. The pressing machine 6 has a sealed box 22 outside, and the top of the sealed box 22 has an air inlet pipe 20 connected to the exhaust pipe 8. A main hot air inlet pipe 12 parallel to the length of the curing oven 7 is provided on one side. The lower part of the sealed box 22 is connected to the front port of the main hot air inlet pipe 12 through the air duct 21. The rear port of the main hot air inlet pipe 12 is blocked. The main hot air inlet pipe 12 is connected to the lower sealed chamber 11 of the curing oven 7 through several branch hot air inlet pipes 13. The upper sealed chamber 10 of the curing oven 7 is connected to the air outlet pipe 14. The air outlet pipe 14 is connected to the exhaust pipe 30. The outlet of the exhaust pipe 30 is connected to the exhaust fan 15. A filter device 16 is provided on the exhaust pipe 30.

[0017] The curing oven 7 has a front air outlet 17 and a rear air outlet 18, which are both connected to the upper sealed chamber 10, at the top front end and the top rear end, respectively. The front and rear ends of the air outlet duct 14 are connected to the front air outlet 17 and the rear air outlet 18, respectively.

[0018] The lower part of the curing oven 7 is provided with a hot air inlet 19 along the length direction, which is connected to the hot air inlet pipe 13 in a one-to-one correspondence.

[0019] The front and rear side walls of the sealed box 22 are equipped with guide rails 26. A horizontal pull-out filter screen 24, located below the rock wool product 23, slides along the two guide rails 26. An inspection door 25 for replacing the filter screen 24 is located on the lower left or right side of the sealed box 22. A high-temperature resistant sealing strip is installed between the inspection door 25 and the sealed box 22. Thermal insulation material is wrapped around all pipes to reduce heat loss.

[0020] The production process of this invention includes the following steps: S1. Raw material preparation: The main raw material of rock wool board 9 is basalt slag, and auxiliary materials such as slag, dolomite and coke are added at the same time. Each raw material needs to be accurately proportioned in a certain proportion. S2. Melting treatment: The prepared raw materials are sent into plasma furnace 1 for full melting; S3, Centrifugal spinning: The molten raw material is passed through a high-speed centrifuge 2 to form long and thin inorganic cotton fibers; S4 and the cotton collecting drum 3 convert high-temperature fibers into structurally stable primary cotton felt; at the same time, the high-speed blower cools the inorganic cotton fibers, causing them to form rapidly; high-temperature exhaust gas is discharged through the exhaust pipe 8. S5. Increase the density and hardness of inorganic cotton by using the pendulum cotton cloth machine 4; S6. Rock wool fibers are mechanically folded using a pleating machine to form a three-dimensional network; S7. A rock wool board 9 with a porous honeycomb structure, which is shaped by the press 6, is made of rock wool that is breathable from top to bottom. At the same time, the high-temperature exhaust gas in the exhaust pipe 8 enters the sealed box 22 through the air inlet pipe 20 to heat the rock wool product 23 being pressed by the press 6. During the pressing process, the bottom surface of the rock wool product 23 has multiple support rollers, and the upper surface of the rock wool product 23 is in full contact with the high-temperature exhaust gas. Since the rock wool product 23 is not yet heated and solidified, the internal pores are larger and there is more binder. Therefore, when the rock wool product 23 passes from top to bottom, a large amount of dust carried in the high-temperature exhaust gas is adsorbed by the binder on the rock wool product 23. Then the high-temperature exhaust gas passes downward through the filter plate 24. The filter plate 24 is designed to prevent the cotton fibers being pressed from being blown downward. Then the high-temperature exhaust gas enters the main hot air inlet pipe 12 through the air duct 21 on the lower side of the sealed box 22. S8. The rock wool board is conveyed to the curing oven 7 for foaming and curing. The shaped rock wool material is then dried at high temperature to remove internal moisture and increase its stability. S9. During the process of the rock wool board 9 moving from front to back in the curing oven 7, the exhaust fan 15 draws air from the upper sealed chamber of the curing oven 7. The high-temperature exhaust gas in the sealed box 22 enters the main hot air inlet pipe 12 through the exhaust pipe 21, and then enters the lower sealed chamber of the curing oven 7 through several hot air inlet pipes 13. Because the fibers naturally form a three-dimensional porous network when they are pleated, the gas can pass through the three-dimensional porous network, i.e., a large number of tiny pores, during the curing process in the curing oven 7. The pores are connected by fiber bridges. The high-temperature airflow dries the rock wool board 9 at high temperature. At the same time, the dust carried in the airflow is adsorbed by the binder inside the rock wool board 9. The rock wool board 9 continuously filters the dust in the airflow during the airflow process. The filtered air enters the upper sealed chamber 10 and is then discharged through the exhaust pipe 14 and the exhaust pipe 30. After the final filtration by the filter device 16, it meets the emission requirements and is discharged into the atmosphere.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A space-saving rock wool production line, comprising, in sequence from front to back, a plasma furnace, a centrifuge, a cotton collecting drum, a pendulum cotton distributor, a pleating machine, a pressing machine and a curing furnace, an exhaust pipe being connected to an exhaust port of the cotton collecting drum, the curing furnace being internally provided with an upper track and a lower track for clamping and moving a rock wool board backwards, the rock wool board dividing the curing furnace into an upper sealed chamber and a lower sealed chamber, characterized in that: The pressing machine is externally provided with a sealing box, the top of the sealing box is provided with an air inlet pipe communicated with an exhaust pipe, one side of the curing furnace is provided with a main hot air inlet pipe parallel to the length direction of the curing furnace, the lower side of the sealing box is connected with the front end of the main hot air inlet pipe through an air guide pipe, the rear end of the main hot air inlet pipe is blocked, the main hot air inlet pipe is connected with the lower closed chamber of the curing furnace through a plurality of branch hot air inlet pipes, the upper closed chamber of the upper part of the curing furnace is connected with an air outlet pipe, the air outlet pipe is connected with an air exhaust pipe, and the outlet of the air exhaust pipe is connected with an air exhaust fan.

2. A space saving rock wool production line according to claim 1, characterized in that: The air exhaust pipe is provided with a filtering device.

3. A space-saving rock wool production line according to claim 1 or 2, characterized in that: The front end and the rear end of the top of the curing furnace are respectively provided with a front air outlet and a rear air outlet communicated with the upper closed chamber, and the front air outlet and the rear air outlet are connected with the front end and the rear end of the air outlet pipe.

4. A space-saving rock wool production line according to claim 1 or 2, characterized in that: The lower side of the curing furnace is provided with a hot air inlet corresponding to the branch hot air inlet pipe along the length direction.

5. A space saving rock wool production line according to claim 1 or 2, characterized in that: The front side wall and the rear side wall in the sealing box are both provided with guide rails, and a horizontal pull-out type filter screen plate located below the rock wool product is slidably arranged on the two guide rails, and the lower part of the left side or the right side of the sealing box is provided with an access door for replacing the filter screen plate.

6. A space saving rock wool production line according to claim 5, characterized in that: The production process flow includes the following steps: S1, raw material preparation: the main raw material of the rock wool board is basalt slag, and slag, dolomite and coke auxiliary materials are added, and each raw material needs to be accurately proportioned according to a certain proportion; S2, melting treatment: the prepared raw materials are sent into the plasma furnace for sufficient melting; S3, centrifugal spinning: the melted raw materials pass through a high-speed centrifugal machine to form fine inorganic cotton filaments; S4, the primary cotton felt is formed by the high-temperature fibers, and the high-speed air blower cools the inorganic cotton filaments to make them form quickly; the high-temperature waste gas is discharged through the exhaust pipe; S5, the pendulum cotton distributor is used to increase the density and hardness of the inorganic cotton; S6, the rock wool fibers are mechanically folded by the pleating machine to form a three-dimensional network; S7, the rock wool board with upper and lower ventilation and a porous network honeycomb structure is formed by the pressing machine; at the same time, the high-temperature waste gas in the exhaust pipe enters the sealing box through the air inlet pipe to heat the rock wool product being pressed by the pressing machine, the rock wool product bottom surface has a plurality of supporting rollers, the upper surface of the rock wool product is in full contact with the high-temperature waste gas, and the rock wool product is not heat-cured at this time, the internal space is larger, and the binder is more, so that a large amount of dust carried by the high-temperature waste gas is adsorbed by the binder on the rock wool product when the high-temperature waste gas passes through the rock wool product from top to bottom, and then the high-temperature waste gas passes through the filter screen plate, the setting of the filter screen plate blocks the cotton filaments being pressed from being blown away downward; then the high-temperature waste gas enters the main hot air inlet pipe through the air guide pipe at the lower side of the sealing box; S8, the rock wool board is conveyed to the curing furnace for foaming and curing, the cured rock wool material is subjected to high-temperature drying treatment to remove internal moisture and increase stability; S9, in the curing oven, the upper closed chamber is exhausted by the air extractor, the high-temperature exhaust gas in the sealed box enters the main hot air inlet pipe through the air guide pipe, and then enters the lower closed chamber in the curing oven through a plurality of branch hot air inlet pipes. During the curing process in the curing oven, the gas can penetrate the three-dimensional porous network, i.e. a large number of tiny pores, which are connected by fiber bridges. The high-temperature airflow dries the rock wool board, and the dust carried by the airflow is adsorbed by the binder inside the rock wool board. The rock wool board filters the dust in the airflow during the airflow process. The filtered air enters the upper closed chamber, and then is discharged through the air outlet pipe. After the final filtration by the filtering device, the air meets the emission requirements and is discharged into the atmosphere.

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