Still kettle for producing aerated bricks and production method

Abstract

The invention relates to the field of aerated brick production, in particular to a still kettle for aerated brick production and a production method. The still kettle for producing the aerated bricks comprises a tank body, a bearing moving body, a water gathering plate and a steam forming mechanism, one end of the tank body is configured to be openable, and the tank body is provided with a vacuum pumping assembly, a polyvinyl alcohol solution spraying assembly and a steam spraying assembly; the bearing moving body is arranged in the tank body and is used for bearing the aerated bricks and driving the aerated bricks to move in the tank body; the water gathering plate is arranged in the tank body and located below the bearing moving body, the periphery of the water gathering plate is high, the middle of the water gathering plate is low, and a water tank is arranged in the middle of the water gathering plate and tightly attached to the tank body; the steam forming mechanism is installed outside the tank body and used for heating the water tank. Water in the material can be greatly inhibited from escaping, the hydration time is prolonged, the strength of the material is enhanced, and the use amount of aluminum powder can be greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of aerated brick production, and in particular to an autoclave for aerated brick production and a production method. Background Art

[0002] Aerated bricks have the advantages of light weight, sound insulation, good thermal insulation, and high temperature resistance. In the production process, the realization of these advantages is inseparable from the autoclave. After high temperature and high pressure steam curing, the strength and performance of the aerated block are guaranteed, and the beauty of its appearance is not easily destroyed. In the production process, the working principle of the autoclave is mainly the curing in the autoclave, including three stages of heating, constant temperature, and cooling. The quality of the various properties of aerated bricks is mainly determined by the curing temperature (pressure) and the length of the curing time. The temperature (pressure) is high, the reaction is sufficient, and the performance is good. At the same time, when the brick curing temperature is high, the curing time required to obtain the same strength can be shortened accordingly.

[0003] However, the inventor of this patent found that the higher the temperature during the curing process, the better. Instead, sufficient moisture must be maintained at high temperature to allow the reaction to continue. Once the moisture in the material evaporates, the strength will not continue to increase. Therefore, when the blank hardens to a certain degree, the purpose of switching to wet heat curing is to inhibit the evaporation of moisture, so that the hydrothermal process can continue and the hydrothermal reaction can be completed as thoroughly as possible.

[0004] In addition, the bubble generation process of aerated bricks mainly relies on the addition of aluminum powder. Generally, the weight share of aluminum powder in the gas-generating material accounts for more than half, the consumption is large, and the cost is high. Therefore, if the cost of aerated bricks needs to be reduced, the amount of aluminum powder must be reduced. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide an autoclave for producing aerated bricks, which can greatly inhibit the escape of moisture in the material, prolong the hydration time and enhance the strength of the material, and can also greatly reduce the amount of aluminum powder used.

[0006] In order to solve the above technical problems, the technical solution of the present invention is: an autoclave for producing aerated bricks, comprising:

[0007] A tank body, one end of which is configured to be openable, and the tank body is provided with a vacuum exhaust component, a polyvinyl alcohol solution spray component and a steam spray component;

[0008] A carrying moving body is arranged in the tank body and is used to carry the aerated bricks and drive the aerated bricks to move in the tank body;

[0009] A water collecting plate is arranged in the tank body and below the carrying movable body. The water collecting plate is high at the periphery and low in the middle, and a water trough is arranged in the middle, and the water trough is close to the tank body;

[0010] The steam generating mechanism is installed outside the tank body and is used for heating the water tank.

[0011] Furthermore, the vacuum exhaust assembly and the polyvinyl alcohol solution spray assembly are arranged on the top of the tank body; the steam spray assembly is arranged on the bottom of the tank body and is located around the water tank.

[0012] In order to further reduce heat loss as much as possible, the outer wall of the tank body is provided with an insulation layer.

[0013] A specific structure of a steam generating mechanism is further provided, wherein the steam generating mechanism is an electric heating component.

[0014] A specific structure of a carrying mobile body is further provided, wherein the carrying mobile body comprises a track and a mobile platform, wherein the track is installed in the tank body, and the mobile platform is rollingly installed on the track through its wheels.

[0015] Furthermore, the autoclave for producing aerated bricks also includes a support frame, which is located at the bottom of the tank body and is used to support the tank body.

[0016] In order to further prevent the tank body from being deformed and damaged due to thermal expansion and contraction, the support frame is an elastic telescopic structure.

[0017] Furthermore, a movable sealing head is installed at the openable end of the tank body, and a fixed sealing head is provided at the other end.

[0018] The present invention also relates to a method for producing aerated bricks, comprising:

[0019] Step S1, casting a slurry with aluminum as a foaming agent into the aerated brick mold frame, while it is not completely hardened, the aerated brick mold frame enters the tank body from the open end of the tank body and is placed on the carrying movable body, the carrying movable body drives the aerated brick mold frame to move to a suitable position in the tank body, and closes the end of the tank body;

[0020] Step S2, open the vacuum pumping assembly, perform vacuum pumping operation on the tank body, and at the same time, use the polyvinyl alcohol solution spraying assembly to spray a polyvinyl alcohol solution with a mass concentration of 0.4% to 1% into the tank body 1, and the air pressure in the tank body is maintained at 4000Pa to 6000Pa for 4-8h;

[0021] Step S3, pull the aerated brick mold frame together with the shaped aerated bricks out of the tank, remove the aerated brick mold frame, and put the aerated bricks back into the carrying movable body;

[0022] Step S4, start the steam forming mechanism, and at the same time, the polyvinyl alcohol solution spraying component continues to spray the polyvinyl alcohol solution, and the steam spraying component sprays steam into the tank body, maintaining the temperature in the tank body at 120-200 degrees and the pressure at 1.2-1.4MPa, curing for 3-5 hours, reducing the pressure and temperature, and taking out the aerated bricks.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects:

[0024] 1. The use of the autoclave in the present invention can greatly reduce the amount of aluminum powder used. On the basis of maintaining the original pore volume, the amount of aluminum powder used can be reduced by 1 / 4 to 1 / 2;

[0025] 2. The autoclave of the present invention has strong water (steam) retention performance, which can greatly inhibit the escape of water inside the material, so that the hydration reaction can continue, prolong the hydration time and enhance the strength of the material;

[0026] 3. The autoclave in the present invention sprays the surface of the material, which can make the surface of the material relatively smooth;

[0027] 4. The present invention recovers condensed water and heats it in time, which can save heat energy and reduce pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic structural diagram of an autoclave for producing aerated bricks according to the present invention;

[0029] Figure 2 It is a structural schematic diagram of an autoclave for producing aerated bricks carrying aerated bricks (with an aerated brick mold frame) of the present invention;

[0030] Figure 3 It is a structural schematic diagram of an autoclave for producing aerated bricks carrying aerated bricks (without an aerated brick mold frame) of the present invention;

[0031] Figure 4 It is a structural schematic diagram of a mobile platform carrying aerated bricks (with aerated brick mold frames) of the present invention;

[0032] In the figure, 1, tank body; 11, movable head; 12, fixed head; 2, vacuum extraction component; 3, polyvinyl alcohol solution spray component; 4, steam spray component; 5, load-bearing moving body; 51, track; 52, mobile platform; 6, support frame; 7, water collecting plate; 8, water tank; 9, steam forming mechanism; 10, insulation layer; 100, aerated brick; 200, aerated brick mold frame. DETAILED DESCRIPTION

[0033] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments in conjunction with the accompanying drawings.

[0034] like Figures 1 to 4 As shown, an autoclave for producing aerated bricks comprises:

[0035] A tank body 1, one end of which is configured to be openable, and the tank body 1 is provided with a vacuum exhaust component 2, a polyvinyl alcohol solution spray component 3 and a steam spray component 4;

[0036] The carrying moving body 5 is arranged in the tank body 1, and is used to carry the aerated brick 100 and drive the aerated brick 100 to move in the tank body 1;

[0037] The water collecting plate 7 is arranged in the tank body 1 and is located below the carrying moving body 5. The water collecting plate 7 is high at the periphery and low in the middle, so that the condensed water in the tank body 1 can be collected in one place. A water tank 8 is arranged in the middle, and the water tank 8 is close to the tank body 1.

[0038] The steam generating mechanism 9 is installed outside the tank body 1 at a position directly facing the water tank 8 , and is used to heat the water tank 8 to ensure the amount of water vapor in the tank body 1 .

[0039] The aerated brick production method based on the autoclave for aerated brick production comprises:

[0040] Step S1, casting the slurry with aluminum as the foaming agent into the aerated brick mold frame 200, before it is completely hardened, the aerated brick mold frame 200 enters the tank body 1 from the open end of the tank body 1 and is placed on the carrying movable body 5, the carrying movable body 5 drives the aerated brick mold frame 200 to move to a suitable position in the tank body 1, and closes the end of the tank body 1, such as Figure 2 As shown;

[0041] Step S2, open the vacuum pumping component 2, and perform vacuum pumping operation on the tank body 1, so that the air pressure in the tank body 1 gradually decreases until it is close to vacuum, and the air pressure is maintained at 4000Pa~6000Pa for 4-8h, so that the bubbles formed by aluminum in the slurry become larger, and the aerated brick 100 is lighter; that is, the amount of aluminum can be reduced under the condition of obtaining the same amount of bubbles; while vacuuming, use the polyvinyl alcohol solution spraying component 3 to spray a polyvinyl alcohol solution with a mass concentration of 0.4%~1% into the tank body 1, which can not only maintain humidity, but also keep the surface of the aerated brick 100 relatively smooth, and will not be very rough due to the rupture of surface bubbles. Polyvinyl alcohol can also be used to form a polymer film on the surface of the aerated brick 100 to control the evaporation of water on the surface of the aerated brick 100; after vacuuming and maintaining for 4-8h, the bubbles are basically fixed;

[0042] Step S3, pull the aerated brick mold frame 200 together with the shaped aerated brick 100 out of the tank body 1, remove the aerated brick mold frame 200, and put the aerated brick 100 back into the carrying movable body 5, as shown in FIG. Figure 3 As shown;

[0043] Step S4, start the steam forming mechanism 9, and at the same time, the polyvinyl alcohol solution spraying component 3 continues to spray the polyvinyl alcohol solution to increase the humidity in the tank; the steam spraying component 4 sprays steam into the tank body 1 to increase the temperature in the tank body 1, and maintains the temperature in the tank body 1 at 120-200 degrees, the pressure at 1.2-1.4MPa, and maintains for 3-5 hours. After completion, reduce the pressure and temperature, and take out the aerated brick 100.

[0044] By using the autoclave in this embodiment, the amount of aluminum powder used can be greatly reduced. On the basis of maintaining the original pore volume, the amount of aluminum powder used can be reduced by 1 / 4 to 1 / 2; moreover, the autoclave in this embodiment has a strong water (steam) retention performance, which can greatly inhibit the escape of moisture inside the material, so that the hydration reaction can continue, prolong the hydration time and enhance the strength of the material; the spraying effect on the surface of the material can make the surface of the material relatively smooth; the recovery and timely heating of condensed water can save heat energy and reduce the generation of pollution.

[0045] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the vacuum exhaust component 2 and the polyvinyl alcohol solution spray component 3 are arranged on the top of the tank body 1; the steam spray component 4 is arranged at the bottom of the tank body 1 and is located around the water tank 8.

[0046] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the outer wall of the tank body 1 is provided with a heat-insulating layer 10 .

[0047] Specifically, the thermal insulation layer 10 can play a role in thermal insulation, thereby minimizing heat loss in the tank body 1.

[0048] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the steam generating mechanism 9 is an electric heating component, which may be an electric heating tube or an electromagnetic heater. The one shown in the figure is an electric heating tube.

[0049] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, a movable sealing head 11 is installed at the openable end of the tank body 1, and a fixed sealing head 12 is provided at the other end.

[0050] In one embodiment, Figures 1 to 4As shown, the carrying mobile body 5 includes a track 51 and a mobile platform 52. The track 51 is installed in the tank body 1, and the mobile platform 52 is rolled on the track 51 through its wheels. The track 51 extends from the end where the movable head 11 is located to the end where the fixed head 12 is located. The mobile platform 52 moves along the track 51, and the aerated bricks 100 can be transported in and out.

[0051] The mobile platform 52 may be a platform with a self-powered mechanism. The mobile platform 52 is provided with a motor, and the motor drives the wheels of the mobile platform 52 to rotate, thereby enabling the mobile platform 52 to move along the track 51 .

[0052] Of course, the mobile platform 52 can also be a platform without a power mechanism. The mobile platform 52 can be pushed and pulled along the track 51 by human power through tools. It can also be equipped with a mobile driving mechanism such as an electric push rod, an oil cylinder, or a pneumatic cylinder to drive the mobile platform to move along the track 51 through the mobile driving mechanism.

[0053] In addition, if Figures 1 to 4 As shown, the plane of the mobile platform 52 for placing the aerated bricks 100 or the aerated brick modules 200 is provided with a plurality of leakage holes, and the aerated bricks 100 or the aerated brick modules 200 are placed on this plane at intervals so that some of the leakage holes are exposed, thereby facilitating the sprayed liquid to leak from the leakage holes; when vacuuming, it also plays a ventilating role, so that the entire autoclave can be vacuumed more quickly.

[0054] In one embodiment, Figure 1 , Figure 2 and Figure 3 As shown, the autoclave for producing aerated bricks further comprises a support frame 6, which is located at the bottom of the tank body 1 and is used to support the tank body 1. The support frame 6 may be an elastic telescopic structure.

[0055] Specifically, the support frame 6 allows the tank body 1 to freely expand and contract when it is heated or cooled, thereby preventing the tank body 1 from being damaged due to temperature changes.

[0056] Below Figure 1 , Figure 2 and Figure 3 The working process of the autoclave for aerated brick production (preferred embodiment of the present invention) is introduced in detail.

[0057] During operation, the slurry with aluminum as the foaming agent is poured into the aerated brick mold frame 200. Before it is completely hardened, the aerated brick mold frame 200 filled with the slurry is pushed into the tank body 1 by the track 51, the movable head 11 is closed, and the vacuum extraction component 2 on the top of the tank body 1 is opened to gradually reduce the air pressure in the tank body 1 until it is close to vacuum. The air pressure is maintained at 4000Pa~6000Pa for 4-8h, so that the bubbles formed by aluminum in the slurry become larger and the aerated brick 100 becomes lighter. That is, when the amount of bubbles is the same, the use of aluminum can be reduced. amount; while evacuating, use the polyvinyl alcohol solution spraying assembly 3 on the top of the tank body 1 to spray a polyvinyl alcohol solution with a mass concentration of 0.4% to 1% into the tank body 1, which can not only maintain humidity, but also keep the surface of the aerated brick 100 relatively smooth, and will not be rough due to the rupture of surface bubbles. Polyvinyl alcohol can also be used to form a polymer film on the surface of the aerated brick 100 to control the evaporation of water on the surface of the aerated brick 100; after evacuating and maintaining for 4-8 hours, the bubbles are basically formed, and then the tank body 1 is pulled out and the aerated brick mold frame 200 is removed;

[0058] The aerated brick 100 with the aerated brick mold frame 200 removed is placed in the tank body 1. The electric heating pipe at the bottom of the tank body 1 is started to continuously heat the water in the tank body 1 to ensure the amount of water vapor in the tank body 1. At the same time, the polyvinyl alcohol solution spraying component 3 continues to spray the polyvinyl alcohol solution to increase the humidity in the tank body 1. Steam is sprayed into the tank body 1 through the steam spraying component 4 at the bottom of the tank body 1 to increase the temperature in the tank body 1 and keep the temperature in the tank body 1 at 120 to 200 degrees. The insulation layer 10 can play a role in insulation and minimize the heat loss in the tank body 1. The pressure in the tank body 1 is maintained at 1.2 to 1.4 MPa, and the curing is carried out for 3 to 5 hours. After completion, the pressure and temperature are reduced, and the aerated brick 100 can be taken out. During the whole process, the support frame 6 can freely expand and contract when the tank body 1 expands and contracts, avoiding damage to the tank body 1 due to temperature changes. During the temperature and pressure reduction stage, the water collecting plate 7 is high at the periphery and low in the middle, so that the condensed water in the tank body 1 can be collected in the water tank 8 in the middle of the bottom of the water collecting plate 7, so as to recover the condensed water and reduce the generation of pollution.

[0059] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An autoclave for producing aerated bricks, characterized in that: include: A tank body (1) has one end portion configured to be openable, and is provided with a vacuum exhaust component (2), a polyvinyl alcohol solution spray component (3) and a steam spray component (4); A carrying moving body (5) is arranged in the tank body (1) and is used to carry the aerated brick (100) and drive the aerated brick (100) to move in the tank body (1); A water collecting plate (7) is arranged in the tank body (1) and is located below the carrying movable body (5). The water collecting plate (7) is high at the periphery and low in the middle, and a water trough (8) is arranged in the middle. The water trough (8) is closely attached to the tank body (1); A steam generating mechanism (9) is installed outside the tank body (1) and is used to heat the water tank (8).

2. The autoclave for producing aerated bricks according to claim 1, characterized in that: The vacuum pumping component (2) and the polyvinyl alcohol solution spraying component (3) are arranged on the top of the tank body (1); The steam spraying component (4) is arranged at the bottom of the tank body (1) and is located around the water tank (8).

3. The autoclave for producing aerated bricks according to claim 1, characterized in that: The outer wall of the tank body (1) is provided with a heat-insulating layer (10).

4. The autoclave for producing aerated bricks according to claim 1, characterized in that: The steam generating mechanism (9) is an electric heating component.

5. The autoclave for producing aerated bricks according to claim 1, characterized in that: The carrying mobile body (5) comprises a track (51) and a mobile platform (52); the track (51) is installed in the tank body (1); and the mobile platform (52) is rollingly installed on the track (51) via its wheels.

6. The autoclave for producing aerated bricks according to claim 1, characterized in that: The openable end of the tank body (1) is provided with a movable sealing head (11), and the other end is provided with a fixed sealing head (12).

7. The autoclave for producing aerated bricks according to claim 1, characterized in that: It also comprises a support frame (6), wherein the support frame (6) is located at the bottom of the tank body (1) and is used to support the tank body (1).

8. The autoclave for producing aerated bricks according to claim 7, characterized in that: The support frame (6) is an elastic telescopic structure.

9. A method for producing aerated bricks using the autoclave for producing aerated bricks according to any one of claims 1 to 8, characterized in that: include: Step S1, casting a slurry with aluminum as a foaming agent into the aerated brick mold frame (200), and before it is completely hardened, the aerated brick mold frame (200) enters the tank body (1) from the open end of the tank body (1) and is placed on the carrying movable body (5), and the carrying movable body (5) drives the aerated brick mold frame (200) to move to a suitable position in the tank body (1), and closes the end of the tank body (1); Step S2, opening the vacuum pumping assembly (2) to perform a vacuum pumping operation on the tank body (1), and at the same time, using the polyvinyl alcohol solution spraying assembly (3) to spray a polyvinyl alcohol solution with a mass concentration of 0.4% to 1% into the tank body (1), and the air pressure in the tank body (1) is maintained at 4000Pa to 6000Pa for 4-8h; Step S3, pull the aerated brick mold frame (200) together with the shaped aerated brick (100) out of the tank body (1), remove the aerated brick mold frame (200), and put the aerated brick (100) back into the carrying movable body (5); Step S4, start the steam generating mechanism (9), while the polyvinyl alcohol solution spraying assembly (3) continues to spray the polyvinyl alcohol solution, and the steam spraying assembly (4) sprays steam into the tank body (1), maintaining the temperature in the tank body (1) at 120 to 200 degrees and the pressure at 1.2 to 1.4 MPa, curing for 3 to 5 hours, reducing the pressure and temperature, and taking out the aerated brick (100).

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