An industrialized aerated concrete mineralization curing monitoring system and method

Abstract

The present invention discloses an industrialized aerated concrete mineralization curing monitoring system and method, which includes a carbonization kettle and a humidity control unit, a temperature control unit, a pressure control unit and a carbon dioxide control unit installed on the carbonization kettle. The humidity control unit includes a humidity sensor and a humidity control system. The temperature control unit includes a temperature sensor, a cooling water pipe and a circulating water pump. The pressure control unit includes a pressure regulating valve group and a pressure sensor. The carbon dioxide control unit includes a carbon dioxide concentration detection sensor inside the kettle, a carbon dioxide purging electric gate valve, a carbon dioxide concentration detector outside the kettle and an alarm system. The monitoring system of the present invention can monitor the state of the carbonization reactor itself and the carbon dioxide concentration inside and outside, ensure the safety of personnel and equipment, and improve the overall operation level of the carbonization reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of carbonization reactor equipment, and in particular to an industrialized aerated concrete mineralization curing monitoring system and method. Background Art

[0002] Aerated concrete has excellent properties such as light weight, fire resistance, sound insulation, and heat insulation, and is widely used in the field of building materials. Ordinary aerated concrete usually undergoes an autoclaving process, which consumes a high amount of energy. With the development of the non-autoclaved aerated concrete technology, carbon dioxide mineralization curing of aerated concrete can replace the autoclaving process of traditional concrete and reduce the energy consumption of aerated concrete.

[0003] The existing special carbonization reactors for aerated concrete have not established corresponding operation monitoring schemes to ensure the normal operation of the carbonization reactors to guarantee the quality of aerated concrete and the safety of personnel and equipment. Therefore, a set of operation monitoring schemes is needed. On the one hand, according to the characteristics of the aerated concrete mineralization curing process, monitor and adjust the operation parameters of the carbonization reactor to ensure the quality of aerated concrete; on the other hand, monitor the state of the carbonization reactor itself and the carbon dioxide concentration inside and outside to guarantee the safety of personnel and equipment and improve the overall operation level of the carbonization reactor. Summary of the Invention

[0004] The purpose of the present invention is to provide an industrialized aerated concrete mineralization curing monitoring system and method to solve the problem of the imperfect operation monitoring scheme of the special carbonization reactor in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An industrialized aerated concrete mineralization curing monitoring system provided by the present invention includes a carbonization kettle, and a humidity control unit, a temperature control unit, a pressure control unit, and a carbon dioxide control unit installed on the carbonization kettle. The humidity control unit includes a humidity sensor and a humidity control system. The temperature control unit includes a temperature sensor, a cooling water pipe, and a circulating water pump. The pressure control unit includes a pressure regulating valve group and a pressure sensor. The carbon dioxide control unit includes a carbon dioxide concentration detection sensor inside the kettle, a carbon dioxide purge electric gate valve, a carbon dioxide concentration detector outside the kettle, and an alarm system. The signals of the humidity sensor, the temperature sensor, the pressure sensor, the carbon dioxide concentration detection sensor inside the kettle, the carbon dioxide concentration detector outside the kettle, and the alarm system are connected to the DCS control system.

[0007] Further, there are 4 temperature sensors, which are evenly distributed on the upper and lower sides of the carbonization kettle.

[0008] Further, the pressure regulating valve group includes an intake electric regulating valve and an exhaust electric regulating valve, with a pressure regulation range of 0.01~2.0 MPa, and the pressure monitoring range of the pressure sensor is 0~3 MPa.

[0009] Further, there are a total of 4 carbon dioxide concentration detection sensors inside the autoclave, distributed at the upper, lower, front, and rear of the carbonization autoclave; there are a total of 4 carbon dioxide concentration detection and alarm systems outside the autoclave, distributed in the middle of the upper, lower, front, and rear of the carbonization autoclave.

[0010] An industrialized aerated concrete mineralization curing monitoring method, based on an industrialized aerated concrete mineralization curing monitoring system, includes the following steps:

[0011] S1. Set the pressure regime inside the autoclave. Through the DCS control system and the set PLC control program, when the pressure inside the autoclave is lower than the set value, the intake electric regulating valve will automatically start to charge the autoclave with carbon dioxide-containing gas until the pressure reaches the set value; when the pressure inside the autoclave is higher than the set value, the exhaust electric regulating valve will automatically start to discharge part of the gas inside the autoclave until the pressure drops to the set value.

[0012] S2. Set the maximum temperature inside the autoclave. The signal of the temperature sensor is transmitted to the DCS control system. When the temperature exceeds the maximum temperature, the circulating water pump is started through the PLC control program to adjust the water flow rate to control the temperature inside the autoclave.

[0013] S3. Set the humidity inside the autoclave. When the humidity is not within the set range, start the humidity control unit to adjust the humidity inside the autoclave to the set value.

[0014] S4. Set the minimum carbon dioxide concentration value inside the autoclave. The signal of the carbon dioxide concentration detection sensor inside the autoclave is transmitted to the DCS control system. When the carbon dioxide concentration is lower than the set value, the intake electric regulating valve and the exhaust electric regulating valve are started simultaneously, part of the gas inside the autoclave will be discharged, and new high-concentration carbon dioxide gas will be re-injected until the carbon dioxide concentration inside the autoclave reaches the set minimum carbon dioxide concentration value.

[0015] S5. Set the upper limit value of the carbon dioxide concentration outside the autoclave. The signal of the carbon dioxide concentration detector and alarm system outside the autoclave is transmitted to the DCS control system. When the carbon dioxide concentration exceeds the set value, start the alarm system to give an alarm through the PLC control program.

[0016] Further, the maximum temperature in step S2 is 70 °C.

[0017] Based on the above technical solutions, the embodiments of the present invention can at least produce the following technical effects:

[0018] On the one hand, according to the characteristics of the mineralization curing process of aerated concrete, monitor and adjust the operating parameters of the carbonation reactor to ensure the quality of aerated concrete; on the other hand, monitor the status of the carbonation reactor itself and the carbon dioxide concentrations inside and outside to ensure the safety of personnel and equipment and improve the overall operating level of the carbonation reactor.

[0019] Combined with the associated characteristics of the carbonation reactor system and the aerated concrete mineralization process, the monitoring of process parameters set can provide monitoring elements of key information for the joint operation of the carbonation reactor system and the concrete mineralization process. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0021] In the figure: 1, carbonation reactor; 2, humidity control unit; 21, humidity sensor; 22, humidity control system; 3, temperature control unit; 31, temperature sensor; 32, cooling water pipe; 33, circulation water pump; 4, pressure control unit; 411, intake electric control valve; 412, exhaust electric control valve; 42, pressure sensor; 5, carbon dioxide control unit; 51, in-kettle carbon dioxide concentration detection sensor; 52, carbon dioxide purging electric gate valve; 53, out-of-kettle carbon dioxide concentration detector and alarm system. Detailed Embodiments

[0022] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this specification. Obviously, the described embodiments are only a part of the embodiments of this specification, rather than all the embodiments. Based on the embodiments in this specification, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this specification.

[0023] As Figure 1 shown, an industrialized aerated concrete mineralization curing monitoring system includes a carbonation reactor 1 and a humidity control unit 2, a temperature control unit 3, a pressure control unit 4, and a carbon dioxide control unit 5 installed on the carbonation reactor 1. The humidity control unit 2 includes a humidity sensor 21 and a humidity control system 22. The temperature control unit 3 includes a temperature sensor 31, a cooling water pipe 32, and a circulation water pump 33. The pressure control unit 4 includes a pressure regulating valve group and a pressure sensor 42. The carbon dioxide control unit 5 includes an in-kettle carbon dioxide concentration detection sensor 51, a carbon dioxide purging electric gate valve 52, and an out-of-kettle carbon dioxide concentration detector and alarm system 53. The signals of the humidity sensor 21, the temperature sensor 31, the pressure sensor 42, the in-kettle carbon dioxide concentration detection sensor 51, and the out-of-kettle carbon dioxide concentration detector and alarm system 53 are connected to the DCS control system.

[0024] S1. Set the pressure regime in the autoclave as follows: the pressure is 0.02 MPa for the first 0 - 4 h and 0.1 MPa for 4 - 8 h. During the period of 0 - 4 h, when the pressure in the autoclave is lower than 0.02 MPa, the intake electric control valve 411 will automatically start to fill the autoclave with carbon dioxide - containing gas until the pressure reaches 0.02 MPa; when the pressure in the autoclave is higher than 0.02 MPa, the exhaust electric control valve 412 will automatically start to discharge some gas from the autoclave until the pressure drops to 0.02 MPa. At the moment when the 4th hour ends, the intake electric control valve 411 will automatically start to fill the autoclave with carbon dioxide - containing gas until the pressure reaches 0.1 MPa. During the period of 4 - 8 h, when the pressure in the autoclave is lower than 0.1 MPa, the intake electric control valve 411 will automatically start to fill the autoclave with carbon dioxide - containing gas until the pressure reaches 0.1 MPa; when the pressure in the autoclave is higher than 0.1 MPa, the exhaust electric control valve 412 will automatically start to discharge some gas from the autoclave until the pressure drops to 0.1 MPa.

[0025] S2. Set the maximum temperature in the autoclave as 70 °C and monitor the temperature in the autoclave. The carbonization reaction will release a large amount of heat. When the temperature exceeds 70 °C, start the circulating water cooling system, and the flow rate of the cooling circulating water is automatically adjusted according to the temperature change.

[0026] S3. Set the humidity in the autoclave as 80%. When the humidity in the autoclave is higher or lower than 80%, start the humidity control unit to adjust the humidity in the autoclave until the humidity in the autoclave is adjusted to 80%.

[0027] S4. Set the minimum carbon dioxide concentration in the autoclave as 30%. When the carbon dioxide concentration is lower than 30%, both the intake electric control valve and the exhaust electric control valve are started simultaneously. Some gas in the autoclave will be discharged, and new high - concentration carbon dioxide gas will be re - injected until the carbon dioxide concentration in the autoclave reaches 30%.

[0028] S5. Set the upper limit value of the carbon dioxide concentration outside the autoclave as 5%. When the carbon dioxide concentration exceeds 5%, the alarm system will automatically start and give an alarm.

Claims

1. An industrialized aerated concrete mineralization curing monitoring system, characterized in that, It includes a carbonization kettle (1) and a humidity control unit (2), a temperature control unit (3), a pressure control unit (4) and a carbon dioxide control unit (5) installed on the carbonization kettle (1). The humidity control unit (2) includes a humidity sensor (21) and a humidity control system (22). The temperature control unit (3) includes a temperature sensor (31), a cooling water pipe (32) and a circulating water pump (33). The pressure control unit (4) includes a pressure regulating valve group and a pressure sensor (42). The carbon dioxide control unit (5) includes a carbon dioxide concentration detection sensor (51) inside the kettle, a carbon dioxide purge electric gate valve (52), a carbon dioxide concentration detector outside the kettle and an alarm system (53). The signals of the humidity sensor (21), the temperature sensor (31), the pressure sensor (42), the carbon dioxide concentration detection sensor (51) inside the kettle and the carbon dioxide concentration detector outside the kettle and the alarm system (53) are connected to the DCS control system. The control method of the industrial aerated concrete mineralization curing monitoring system is as follows: S1. Set the pressure regime inside the kettle as 0.02 MPa for the first 0 - 4 hours and 0.1 MPa for 4 - 8 hours. During the period of 0 - 4 hours, when the pressure inside the kettle is lower than 0.02 MPa, the intake electric control valve (411) will automatically start to fill the kettle with carbon dioxide - containing gas until the pressure reaches 0.02 MPa. When the pressure inside the kettle is higher than 0.02 MPa, the exhaust electric control valve (412) will automatically start to discharge some gas from the kettle until the pressure drops to 0.02 MPa. At the moment when the 4th hour ends, the intake electric control valve (411) will automatically start to fill the kettle with carbon dioxide - containing gas until the pressure reaches 0.1 MPa. During the period of 4 - 8 hours, when the pressure inside the kettle is lower than 0.1 MPa, the intake electric control valve (411) will automatically start to fill the kettle with carbon dioxide - containing gas until the pressure reaches 0.1 MPa. When the pressure inside the kettle is higher than 0.1 MPa, the exhaust electric control valve (412) will automatically start to discharge some gas from the kettle until the pressure drops to 0.1 MPa. S2. Set the maximum temperature inside the kettle as 70 °C and monitor the temperature inside the kettle. A large amount of heat is released during the carbonization reaction. When the temperature exceeds 70 °C, start the circulating water cooling system, and the flow rate of the cooling circulating water is automatically adjusted according to the temperature change. S3. Set the humidity inside the kettle as 80%. When the humidity inside the kettle is higher or lower than 80%, start the humidity control unit to adjust the humidity inside the kettle until the humidity inside the kettle is adjusted to 80%. S4. Set the minimum carbon dioxide concentration inside the kettle as 30%. When the carbon dioxide concentration is lower than 30%, the intake electric control valve (411) and the exhaust electric control valve (412) are started simultaneously. Some gas inside the kettle will be discharged, and new high - concentration carbon dioxide gas is re - injected until the carbon dioxide concentration inside the kettle reaches 30%. S5. Set the upper limit value of the carbon dioxide concentration outside the kettle as 5%. When the carbon dioxide concentration exceeds 5%, the alarm system is automatically started to give an alarm.

2. The industrialized aerated concrete mineralization curing monitoring system according to claim 1, characterized in that, There are 4 temperature sensors (31) in total, which are evenly distributed on the upper and lower sides of the carbonization kettle (1).

3. The industrial aerated concrete mineralization curing monitoring system according to claim 1, characterized in that, The pressure regulating valve group includes an intake electric regulating valve (411) and an exhaust electric regulating valve (412), and its pressure regulation range is 0.01~2.0 MPa. The pressure monitoring range of the pressure sensor is 0~3 MPa.

4. The industrial aerated concrete mineralization curing monitoring system according to claim 1, characterized in that, There are a total of 4 in-tank carbon dioxide concentration detection sensors (51), which are distributed at the upper, lower, front, and rear of the carbonization kettle (1); there are a total of 4 out-of-tank carbon dioxide concentration detection and alarm systems (53), which are distributed in the middle of the upper, lower, front, and rear of the carbonization kettle (1).

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