CN114643636A - A kind of heat and air mutual conduction system for curing concrete member and its control method - Google Patents

Abstract

The present application relates to a hot air mutual conduction system for curing concrete components and a control method thereof; the system includes: at least two curing kilns, and an intake main pipe, an exhaust main pipe, and an air guiding main pipe; the type of the curing kiln is concrete component curing Kiln and/or pre-curing kiln; one end of the air guide main pipe is connected to the air inlet main pipe, and the other end is connected to the exhaust main pipe; , reach the intake branch pipe of another curing kiln, and the pipelines passing through form a hot gas mutual conduit; the hot gas mutual conduit is provided with a mutual conduction control valve group, which is used to control the flow or blocking of the hot gas between the two curing kilns. . The solution of the present application can realize the dynamic mutual conduction of heat and air, and reduce the heating time of external air intake when there are simultaneous heating and cooling demands in different curing spaces; fully utilize the waste heat, reduce the total heat supply, and reduce the total maintenance of concrete components cost.

Description

A kind of heat and air mutual conduction system for curing concrete member and its control method

technical field

The application relates to the technical field of concrete component production, and in particular to a heat-air mutual conduction system for curing concrete components and a control method thereof.

Background technique

At present, there are still many problems to be solved in the process of automatic production and steam curing of fabricated concrete components. After the curing of the kiln is completed, the waste heat in the kiln is naturally cooled in the kiln and cannot be discharged in time. After the curing of the kiln is completed, the waste heat in the kiln cannot be reused, and the energy consumption is wasted seriously. The hot air in each curing space cannot circulate with each other. To increase the temperature in each curing space, it needs to be heated from the outside separately. There is a lack of row and row, vertical kiln and vertical kiln, vertical kiln and pre-heating in the same kiln. The mutual dynamic complementary temperature adjustment mechanism between the kiln and the kiln and other heat-requiring units.

In the related art, the waste heat in the whole maintenance process cannot be self-discharged and reused, and there is also a lack of interoperable and complementary temperature adjustment mechanisms in each maintenance space, so the maintenance energy consumption is large and the economic benefit is low.

SUMMARY OF THE INVENTION

In order to overcome the problems existing in the related art at least to a certain extent, the present application provides a heat-gas mutual conduction system for curing a concrete member and a control method thereof.

According to a first aspect of the embodiments of the present application, there is provided a hot air mutual conduction system for curing concrete components, including: at least two curing kilns, and an intake main pipe, an exhaust main pipe, and an air guiding main pipe; the type of the curing kiln is: Concrete element curing kilns and/or pre-curing kilns;

One end of the curing kiln and the intake main pipe are connected through an intake branch pipe, and the other end of the curing kiln and the exhaust main pipe are connected through an exhaust branch pipe; The intake main pipe is connected, and the other end is connected with the exhaust main pipe;

From the exhaust branch pipe of any one of the curing kilns, through the exhaust main pipe, the air guide main pipe, and the intake main pipe in sequence, to the intake branch pipe of the other curing kiln, the pipelines passed through are formed. A hot gas mutual conduit; a mutual conduction control valve group is arranged on the hot gas mutual conduit, which is used to control the circulation or blocking of the hot gas between the two curing kilns.

Further, the mutual conductance control valve group includes: an exhaust branch pipe solenoid valve arranged on an exhaust branch pipe of one of the curing kilns, an air guide main pipe solenoid valve arranged on the air guide main pipe, and an air guide pipe solenoid valve arranged on another an air intake branch pipe solenoid valve on the air intake branch pipe of the curing kiln;

The air guide main pipe is also provided with an axial flow fan, and the air flow direction of the axial flow fan during operation is: from the exhaust main pipe to the intake main pipe.

Further, an external heating inlet is provided on the intake main pipe;

From the external heating inlet to any of the inlet branch pipes of the curing kiln, the pipelines passing through form an external heating pipeline; the external heating pipeline is provided with a heating control valve group, which is used to control the hot gas Circulation or blockage in the external heating circuit.

Further, the heating control valve group includes: an intake main solenoid valve arranged on the intake main pipe, and an intake branch solenoid valve arranged on the corresponding intake branch pipe of the curing kiln.

Further, the intake main pipe is provided with a heat exhaust port;

From any exhaust branch pipe of the curing kiln, it passes through the exhaust main pipe, the air guide main pipe, and the air intake main pipe in sequence to reach the heat exhaust port, and the pipelines passed through form an exhaust cooling pipeline. ; A cooling control valve group is arranged on the exhaust cooling pipeline, which is used to control the circulation or blocking of hot gas in the exhaust cooling pipeline.

Further, the system also includes an exhaust chimney and an exhaust chimney main pipe; one end of the exhaust chimney main pipe is connected to the heat exhaust port on the air intake main pipe; the exhaust chimney is arranged on the exhaust chimney main pipe. the other end of ;

The exhaust chimney main pipe is provided with an exhaust chimney main pipe solenoid valve.

Further, the cooling control valve group includes: an exhaust branch pipe solenoid valve arranged on the exhaust branch pipe of the corresponding curing kiln, an air guide main solenoid valve and an exhaust chimney main pipe arranged on the air guide main pipe. The electromagnetic valve.

According to a second aspect of the embodiments of the present application, there is provided a method for controlling thermal conductivity of concrete components, which is applied to the system according to any one of the above embodiments; the method includes:

Get the target temperature and current temperature of all curing kilns;

According to the target temperature and current temperature of each curing kiln, determine the heat demand state of the curing kiln: when the target temperature is greater than the current temperature, the heat demand state of the curing kiln is the heating demand; when the target temperature is lower than the current temperature, the curing kiln The heat demand state of the kiln is the cooling demand;

If there is a curing kiln with a heating demand and a curing kiln with a cooling demand at the same time, the hot gas mutual conduction mode is entered: the control valve group on the control target hot gas mutual conduction path is opened, and all other control valves are closed; wherein, the target hot gas mutual conduction path is : The hot gas mutual conduit between the curing kiln for cooling demand and the curing kiln for heating demand.

Further, the method also includes:

If there is only a curing kiln with heating demand, enter the external heating mode: control the control valve group on the target heating pipeline to open, and all other control valves to close; wherein, the target heating pipeline is: from the external heating inlet External heating piping to the curing kiln for this heating requirement;

If there is only a curing kiln with cooling demand, enter the exhaust cooling mode: the control valve group on the control target cooling pipeline is opened, and all other control valves are closed; wherein, the target cooling pipeline is: from the curing kiln with the cooling demand The exhaust cooling pipeline between the heat exhaust port;

If the target temperature of all curing kilns is equal to the current temperature, close all control valves.

Further, the method also includes:

In the hot gas mutual conduction mode, when the curing kiln that detects the heating demand reaches its target temperature, and the curing kiln that cooling demand does not reach its target temperature, the solenoid valve of the intake branch pipe corresponding to the curing kiln with the heating demand is automatically closed, and at the same time control The curing kiln with cooling demand enters the exhaust cooling mode;

In the hot gas mutual conductance mode, when the curing kiln that detects the cooling demand reaches its target temperature, and the curing kiln with the heating demand does not reach its target temperature, the solenoid valve of the exhaust branch pipe corresponding to the curing kiln with the cooling demand is automatically closed, and at the same time control The curing kiln with heating demand enters the external heating mode.

The technical solutions provided by the embodiments of the present application have the following beneficial effects:

The solution of the present application can realize dynamic mutual conduction of hot gas when different maintenance spaces have both heating and cooling needs, so that each independent maintenance space can establish a dynamic connection, and the heating and cooling methods are more flexible; it is not necessarily required during the heating process. External heating can be achieved through internal dynamic adjustment, reducing the time of external air intake heating; making full use of waste heat, reducing the total heat supply, and reducing the total maintenance cost of concrete components.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not limiting of the present application.

Description of drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

FIG. 1 is a schematic diagram of the pipeline structure of a hot air mutual conduction system for curing a concrete member according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of a specific structure of a hot-air mutual conduction system for curing a concrete member according to an embodiment of the present invention.

FIG. 3 is a control logic diagram of the mutual conduction of hot air for curing of a concrete member according to an embodiment of the present invention.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. Where the following description refers to the drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this application. Rather, they are merely examples of systems and methods consistent with some aspects of the present application as recited in the appended claims.

FIG. 1 is a schematic structural diagram of a heat and gas mutual conduction system for curing a concrete member according to an exemplary embodiment. The system includes: at least two curing kilns, and an intake main pipe 33, an exhaust main pipe 47, and an air guiding main pipe 31; the type of the curing kiln is a concrete component curing kiln and/or a pre-curing kiln.

One end of the curing kiln and the intake main pipe 33 are connected through the intake branch pipe 25, and the other end of the curing kiln and the exhaust main pipe 47 are connected through the exhaust branch pipe 1; One end of 31 is connected to the intake main pipe 33 , and the other end is connected to the exhaust main pipe 47 .

From the exhaust branch pipe of any one of the curing kilns, through the exhaust main pipe 47 , the air guide main pipe 31 , and the air intake main pipe 33 in sequence, to the air intake branch pipe of the other curing kiln. The pipeline forms a hot gas mutual conduit; the hot gas mutual conduit is provided with a mutual conduction control valve group for controlling the circulation or blocking of the hot gas between the two curing kilns.

The solution of the present application can realize dynamic mutual conduction of hot gas when different maintenance spaces have both heating and cooling needs, so that each independent maintenance space can establish a dynamic connection, and the heating and cooling methods are more flexible; it is not necessarily required during the heating process. External heating can be achieved through internal dynamic adjustment, reducing the time of external air intake heating; fully utilizing waste heat, reducing the total heat supply, and reducing the total maintenance cost of concrete components.

The solution of the present application will be expanded and described below in conjunction with specific application scenarios.

As shown in FIG. 2 , in some embodiments of the present application, the entire system for reusing the waste heat from curing of concrete components includes: a kiln body part, a heating air intake part, and an air guiding and exhausting part.

The kiln body part includes: the left concrete component vertical curing kiln body 17 , the right concrete component vertical curing kiln body 41 , and the pre-curing kiln 40 .

The heating intake part includes: the intake main solenoid valve 24 controls the external heating steam to enter the intake main 33 . The solenoid valve 26 for the inlet branch pipe of the first row of the left kiln, the solenoid valve 28 of the inlet branch pipe of the second row of the left kiln, and the solenoid valve 30 of the inlet branch pipe of the third row of the left kiln respectively control the heating steam to pass through the inlet branch pipe 25 of the first row of the left kiln , The second column of the left kiln air inlet branch pipe 27 and the third column of the left kiln air intake branch pipe 29 enter the maintenance space of the corresponding column in the left kiln. The solenoid valve 35 of the first row of the intake branch pipe of the right kiln, the solenoid valve 37 of the second row of the intake branch pipe of the right kiln, and the solenoid valve 39 of the third row of the intake branch pipe of the right kiln respectively control the heating steam to pass through the first row of the intake branch pipe of the right kiln 34 , The second row of air inlet branch pipes 36 of the right kiln and the third row of the right kiln inlet branch pipes 38 enter the maintenance space of the corresponding row of the right kiln. The electromagnetic valve 46 of the pre-curing kiln inlet branch pipe controls the heating steam to enter the curing space of the pre-curing kiln 40 through the pre-curing kiln inlet branch pipe 45 .

The air guide and exhaust part includes: 7 air guide axial fans in the left kiln first row curing kiln 18, left kiln second row curing kiln 19, left kiln third row curing kiln 20, right kiln first row curing kiln 21. The hot steam in the curing kiln 22 of the second row of the right kiln, the curing kiln 23 of the third row of the right kiln, and the pre-curing kiln 40 are controlled by respectively controlling the solenoid valve 2 of the exhaust branch pipe of the first row of the left kiln and the second row of the left kiln. Air branch solenoid valve 4, left kiln 3rd row exhaust branch pipe solenoid valve 6, right kiln 1st row exhaust branch pipe solenoid valve 9, right kiln 2nd row exhaust branch pipe solenoid valve 11, right kiln 3rd row exhaust branch pipe solenoid valve 9 Solenoid valve 13, pre-curing kiln intake manifold solenoid valve 46, and respectively pass through the left kiln first row exhaust manifold 1, the left kiln second row exhaust manifold 3, the left kiln third row exhaust manifold 5, the right kiln row 5 One row of exhaust branch pipes 8, the second row of right kiln exhaust branch pipes 10, the third row of right kiln exhaust branch pipes 12, and the pre-curing kiln exhaust branch pipes 42 allow the hot gas to enter the hot gas guide pipe 31, and through the control of the hot gas guide pipe The solenoid valve 32 re-enters the intake main pipe 33 with the hot steam of the guiding air. The hot steam can enter the exhaust chimney 14 through the exhaust chimney main pipe 15 by controlling the on-off of the solenoid valve 43 of the exhaust chimney main pipe to discharge the excess hot steam out of the kiln.

Referring to FIG. 2, in some embodiments, the mutual conductance control valve group includes: an exhaust branch solenoid valve (2, 4, 6, 9, 11, 13, 44) disposed on an exhaust branch pipe of the curing kiln ), the air guiding main pipe solenoid valve 32 arranged on the air guiding main pipe 31, and the air inlet branch pipe solenoid valve (26, 28, 30, 35, 37, 39, 46).

The air guide main pipe 31 is also provided with an axial flow fan, and the airflow direction of the axial flow fan when working is: from the exhaust main pipe 47 to the intake main pipe 33 .

In some embodiments, the intake main pipe 33 is provided with an external heating inlet. From the external heating inlet to any of the inlet branch pipes of the curing kiln, the pipelines passing through form an external heating pipeline; the external heating pipeline is provided with a heating control valve group, which is used to control the hot gas Circulation or blockage in the external heating circuit.

In some embodiments, the heating control valve group includes: an intake main solenoid valve 24 arranged on the intake main pipe 33, and an intake branch solenoid valve arranged on the corresponding intake branch pipe of the curing kiln. Valves (26, 28, 30, 35, 37, 39, 46).

In some embodiments, the intake main pipe 33 is provided with a heat exhaust port. From any of the exhaust branch pipes of the curing kiln, the exhaust main pipe 47, the air guide main pipe 31, and the air intake main pipe 33 are successively passed to the heat exhaust port, and the exhaust pipe is formed by the passing pipe. A cooling pipeline; a cooling control valve group is arranged on the exhaust cooling pipeline to control the circulation or blocking of hot gas in the exhaust cooling pipeline.

In some embodiments, the system further includes an exhaust chimney 14 and an exhaust chimney main pipe 15; one end of the exhaust chimney main pipe 15 is connected to the heat exhaust port on the intake main pipe 33; the exhaust chimney 14 is provided with At the other end of the main pipe 15 of the exhaust chimney. The exhaust chimney main pipe 15 is provided with an exhaust chimney main pipe solenoid valve 43 .

In some embodiments, the cooling control valve group comprises: exhaust branch pipe solenoid valves (2, 4, 6, 9, 11, 13, 44) arranged on the exhaust branch pipe of the corresponding curing kiln; The air guide main solenoid valve 32 and the exhaust chimney main solenoid valve 43 on the air guide main pipe 31 are provided.

Based on the system described in any one of the above embodiments, the present application further provides a method for controlling the thermal conductivity of concrete components. As shown in Figure 3, the method includes the following steps:

Get the target temperature and current temperature of all curing kilns;

According to the target temperature and current temperature of each curing kiln, determine the heat demand state of the curing kiln: when the target temperature is greater than the current temperature, the heat demand state of the curing kiln is the heating demand; when the target temperature is lower than the current temperature, the curing kiln The heat demand state of the kiln is the cooling demand;

If there is a curing kiln with a heating demand and a curing kiln with a cooling demand at the same time, the hot gas mutual conduction mode is entered: the control valve group on the control target hot gas mutual conduction path is opened, and all other control valves are closed; wherein, the target hot gas mutual conduction path is : The hot gas mutual conduit between the curing kiln for cooling demand and the curing kiln for heating demand.

In some embodiments, the method further includes:

If there is only a curing kiln with heating demand, enter the external heating mode: control the control valve group on the target heating pipeline to open, and all other control valves to close; wherein, the target heating pipeline is: from the external heating inlet External heating piping to the curing kiln for this heating requirement;

If there is only a curing kiln with cooling demand, enter the exhaust cooling mode: the control valve group on the control target cooling pipeline is opened, and all other control valves are closed; wherein, the target cooling pipeline is: from the curing kiln with the cooling demand The exhaust cooling pipeline between the heat exhaust port;

If the target temperature of all curing kilns is equal to the current temperature, close all control valves.

In some embodiments, the method further includes:

In the hot gas mutual conduction mode, when the curing kiln that detects the heating demand reaches its target temperature, and the curing kiln that cooling demand does not reach its target temperature, the solenoid valve of the intake branch pipe corresponding to the curing kiln with the heating demand is automatically closed, and at the same time control The curing kiln with cooling demand enters the exhaust cooling mode;

In the hot gas mutual conductance mode, when the curing kiln that detects the cooling demand reaches its target temperature, and the curing kiln with the heating demand does not reach its target temperature, the solenoid valve of the exhaust branch pipe corresponding to the curing kiln with the cooling demand is automatically closed, and at the same time control The curing kiln with heating demand enters the external heating mode.

As shown in Figure 3, according to the actual production and maintenance situation, the heating and cooling requirements of the kiln row, the two vertical kilns, the vertical kiln and the pre-cured kiln are issued by the host computer system or manually set. And take the dynamic temperature rise and fall adjustment between the rows in the kiln as an example to explain in detail. The heat-gas mutual conductance control method of the embodiment of the present application specifically includes the following steps:

1): When a certain row in the kiln receives the external heating heating demand, the external heating main valve is opened, the intake valve is opened, the exhaust valve is closed, and the chimney valve is closed. The air guide axial flow fan 7 starts to work, and the temperature of a certain row in the kiln begins to rise. When a certain row in the kiln reaches the required temperature, all valve bodies are closed.

2): When a certain row in the kiln receives the exhaust cooling demand, the external heating main valve is closed, the intake valve is closed, the exhaust valve is opened, and the chimney valve is closed. The air guide axial flow fan 7 starts to work, and the temperature of a certain row in the kiln begins to drop. When a certain row in the kiln reaches the required temperature, all valve bodies are closed.

3): When a row in the kiln receives a dynamic heating demand, and another row receives a dynamic cooling demand. The main valve for external heating and the chimney valve are closed first, the intake valve of the column that receives the dynamic heating demand is opened, and the exhaust valve is closed. At the same time, the exhaust valve of the column where the dynamic cooling demand is received is opened, the intake valve is closed, and the air guide axial flow fan 7 starts to work.

4): The column that receives the dynamic heating demand starts to heat up, and the column that receives the dynamic cooling demand starts to cool down. When it is detected that the internal temperature of the column that receives the dynamic heating demand reaches the required temperature, and the column that receives the dynamic cooling demand does not reach the required temperature, the column that receives the dynamic heating demand closes the intake valve body and receives the dynamic cooling demand at the same time. The flow of the 2) step performed by the column.

5): When it is detected that the internal temperature of the column that receives the dynamic heating demand does not reach the required temperature, and the column that receives the dynamic cooling demand reaches the required temperature, the column that receives the dynamic cooling demand closes the exhaust valve body, and receives the The flow of step 1) performed by the column of dynamic heating demand.

Through the curing hot gas mutual conduction and waste heat reuse system of the present application, it is possible to realize the dynamic mutual conduction of hot gas between each row in the curing vertical kiln, between the vertical kiln and the vertical kiln, and between the vertical kiln and the pre-curing kiln, At the same time, the automatic heating and cooling function in the kiln is realized. During the curing and heating process of concrete components, external heating is not necessarily required. It can be achieved through internal dynamic adjustment, reducing the time of external air intake heating. The waste heat is fully utilized to reduce the total heat supply and the total maintenance cost of concrete components.

Between each row of the concrete component curing vertical kiln, between the vertical kiln and the vertical kiln, and between the vertical kiln and the pre-cured kiln, when the different curing spaces have heating and cooling requirements at the same time, the dynamic mutual conduction of hot air can be realized, so that the Each independent maintenance space has established a dynamic connection, and the heating and cooling methods are more flexible.

Each row in the same kiln realizes the dynamic adjustment of hot gas in each curing space through the mutual intake and exhaust of the system of the present invention under the condition that no heating is supplied or the main valve is not fully opened, on the premise that the maintenance requirements are met. . When the maintenance is completed, the waste heat and gas in the maintenance space can be introduced into another maintenance space that needs to be heated and maintained to realize heat reuse.

In the process of curing and heating of concrete components, external heating is not necessarily required, which reduces the heating time of external air intake. The waste heat and gas are fully utilized to reduce the total heat supply and the total maintenance cost of concrete components. Concrete component curing Various vertical curing kilns and pre-curing kilns discharge hot air in the kiln to realize the active cooling function in the kiln.

A system of heat-gas mutual conduction and waste heat reuse for curing concrete components proposed in this application, and a control method thereof, can be realized by those skilled in the art by referring to the content of this article and appropriately changing conditions, although the method and preparation technology of the present invention have been through relatively The preferred embodiments are described, and those skilled in the art can obviously modify or recombine the methods and technical routes described herein without departing from the content, spirit and scope of the present invention to realize the final preparation technology. It should be particularly pointed out that all similar substitutions and modifications apparent to those skilled in the art are deemed to be included in the spirit, scope and content of the present invention.

Claims (10)

1. A hot gas mutual conduction system for curing concrete components, characterized in that it comprises: at least two curing kilns, and an intake main pipe (33), an exhaust main pipe (47), and an air guide main pipe (31); the curing The type of kiln is concrete element curing kiln and/or pre-curing kiln; One end of the curing kiln and the intake main pipe (33) are connected through intake branch pipes (25, 27, 29, 34, 36, 38, 45), and the other end of the curing kiln is connected to the exhaust gas The main pipes (47) are connected through exhaust branch pipes (1, 3, 5, 8, 10, 12, 42); one end of the air guide main pipe (31) is connected with the intake main pipe (33), and the other end connected with the exhaust main pipe (47); From the exhaust branch pipe of any one of the curing kilns, it passes through the exhaust main pipe (47), the air guide main pipe (31), and the air intake main pipe (33) in sequence, and reaches the inlet of the other curing kiln. A gas branch pipe, the pipeline passing through forms a hot gas mutual conduit; the hot gas mutual conduit is provided with a mutual conduction control valve group, which is used to control the circulation or blocking of the hot gas between the two curing kilns. 2. The system according to claim 1, wherein the mutual conductance control valve group comprises: an exhaust branch solenoid valve (2, 4, 6, 9) arranged on an exhaust branch pipe of one of the curing kilns , 11, 13, 44), the air guide main pipe solenoid valve (32) arranged on the air guide main pipe (31), and the air inlet branch pipe solenoid valve (32) arranged on the air inlet branch pipe of the other described curing kiln ( 26, 28, 30, 35, 37, 39, 46); The air guide main pipe (31) is also provided with an axial flow fan, and the airflow direction of the axial flow fan during operation is: from the exhaust main pipe (47) to the intake main pipe (33). 3. The system according to claim 1, wherein an external heating inlet is provided on the intake main pipe (33); From the external heating inlet to any of the inlet branch pipes of the curing kiln, the pipelines passing through form an external heating pipeline; the external heating pipeline is provided with a heating control valve group, which is used to control the hot gas Circulation or blockage in the external heating circuit. 4. The system according to claim 3, wherein the heating control valve group comprises: an intake main solenoid valve (24) arranged on the intake main pipe (33), and an intake main pipe solenoid valve (24) arranged on the corresponding intake main pipe (33) The inlet branch pipe solenoid valves (26, 28, 30, 35, 37, 39, 46) on the inlet branch pipe of the curing kiln. 5. The system according to any one of claims 1-4, wherein a heat exhaust port is provided on the intake main pipe (33); From any exhaust branch pipe of the curing kiln, it passes through the exhaust main pipe (47), the air guide main pipe (31), and the air intake main pipe (33) in sequence, and reaches the heat exhaust port. The pipeline formed by the exhaust cooling pipeline forms an exhaust cooling pipeline; the exhaust cooling pipeline is provided with a cooling control valve group, which is used to control the circulation or blocking of the hot gas in the exhaust cooling pipeline. 6. The system according to claim 5, characterized in that the system further comprises an exhaust chimney (14) and an exhaust chimney main pipe (15); one end of the exhaust chimney main pipe (15) is connected to the intake air The heat exhaust port on the main pipe (33) is connected; the exhaust chimney (14) is arranged at the other end of the main pipe (15) of the exhaust chimney; The exhaust chimney main pipe (15) is provided with an exhaust chimney main pipe solenoid valve (43). 7. The system according to claim 6, wherein the cooling control valve group comprises: exhaust branch pipe solenoid valves (2, 4, 6, 9) arranged on the exhaust branch pipe of the corresponding curing kiln , 11, 13, 44), an air guide main solenoid valve (32) and an exhaust chimney main solenoid valve (43) arranged on the air guide main pipe (31). 8. A method for controlling thermal conductivity of concrete components, wherein the method is applied to the system according to any one of claims 1-7, and the method comprises: Get the target temperature and current temperature of all curing kilns; According to the target temperature and current temperature of each curing kiln, determine the heat demand state of the curing kiln: when the target temperature is greater than the current temperature, the heat demand state of the curing kiln is the heating demand; when the target temperature is lower than the current temperature, the curing kiln The heat demand state of the kiln is the cooling demand; If there is a curing kiln with a heating demand and a curing kiln with a cooling demand at the same time, the hot gas mutual conduction mode is entered: the control valve group on the control target hot gas mutual conduction path is opened, and all other control valves are closed; wherein, the target hot gas mutual conduction path is : The hot gas mutual conduit between the curing kiln for cooling demand and the curing kiln for heating demand. 9. The method according to claim 8, wherein the method further comprises: If there is only a curing kiln with heating demand, enter the external heating mode: the control valve group on the control target heating pipeline is opened, and all other control valves are closed; wherein, the target heating pipeline is: from the external heating inlet External heating piping to the curing kiln for this heating requirement; If there is only a curing kiln with cooling demand, enter the exhaust cooling mode: the control valve group on the control target cooling pipeline is opened, and all other control valves are closed; wherein, the target cooling pipeline is: from the curing kiln with the cooling demand The exhaust cooling pipeline to the heat exhaust port; If the target temperature of all curing kilns is equal to the current temperature, close all control valves. 10. The method according to claim 9, wherein the method further comprises: In the hot gas mutual conduction mode, when the curing kiln with the heating demand reaches its target temperature and the curing kiln with the cooling demand does not reach its target temperature, the solenoid valve of the intake branch pipe corresponding to the curing kiln with the heating demand is automatically closed, and at the same time the control The curing kiln with cooling demand enters the exhaust cooling mode; In the hot gas mutual conduction mode, when the curing kiln that needs to cool down reaches its target temperature, and the curing kiln that needs to heat up does not reach its target temperature, the solenoid valve of the exhaust branch pipe corresponding to the curing kiln that needs to be cooled will be automatically closed, and at the same time the control The curing kiln with heating demand enters the external heating mode.

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