CN111993559A - Calcium silicate board evaporates presses maintenance system - Google Patents
Calcium silicate board evaporates presses maintenance system Download PDFInfo
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- CN111993559A CN111993559A CN202010821086.XA CN202010821086A CN111993559A CN 111993559 A CN111993559 A CN 111993559A CN 202010821086 A CN202010821086 A CN 202010821086A CN 111993559 A CN111993559 A CN 111993559A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
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Abstract
The embodiment of the invention provides a calcium silicate board autoclaved curing system, which comprises a plurality of autoclave kettles, a curing kettle and a curing kettle, wherein the autoclave kettles are used for carrying out autoclaved curing on a calcium silicate board; the steam-pouring main pipeline is connected with the plurality of still kettles through corresponding steam-pouring branch pipelines respectively, waste steam formed by the still kettles after the autoclaved curing process flows into the still kettles in the autoclaved curing process through the steam-pouring main pipeline for recycling, and a steam-pouring valve is arranged corresponding to each still kettle; the steam conveying pipelines are respectively and correspondingly connected with the plurality of still kettles, each still kettle is provided with an air inlet valve corresponding to the steam conveying pipeline, and the air inlet valves are used for regulating the flow of fresh steam flowing into the still kettles in the still curing process; and the controller controls the air-pouring valve to adjust the flow of the waste steam flowing out of or into the autoclave and controls the air inlet valve to adjust the flow of the fresh steam flowing into the autoclave, so that the calcium silicate plate autoclaved curing system can complete the autoclaved curing process of the calcium silicate plates in the autoclaves.
Description
Technical Field
The invention relates to the technical field of calcium silicate board production equipment, in particular to a calcium silicate board autoclaved curing system.
Background
In the process of carrying out autoclaved curing on the calcium silicate board in the autoclave, the opening degree of a steam inflow valve in the autoclave is required to be accurately adjusted so as to adjust the steam flow rate and meet the requirements of the autoclave on the temperature rise rate and the autoclaved curing process, so that the quality of the calcium silicate board after autoclaved curing meets the requirements. The opening of a valve for controlling steam inflow in a still kettle is adjusted in a manual or semi-automatic mode in the steaming and pressing process of a common calcium silicate plate, so that the flow of the steam flowing into the still kettle is adjusted, the manual or semi-automatic mode easily causes the phenomenon that the steam flowing into the still kettle is too much or too little due to misoperation of workers in the steaming and pressing process of the calcium silicate plate or the phenomenon that the operation is wrong when the workers are connected with a machine in the semi-automatic regulation and control, so that the problems that the steam flow flowing into the still kettle is inaccurate in the steaming and pressing process of the calcium silicate plate, the heating rate of the still kettle is inaccurate, the steaming and pressing process deviates from process requirements (process requirements such as the heating time, the heating temperature and the heat preservation time of the still kettle) and the like occur, the production quality of the calcium silicate plate is finally reduced, the yield is low, and steam resources.
Because the operation error is larger when the opening of the valve for controlling the inflow of steam in the autoclave is adjusted by means of manual or semi-automatic modes, reasonable recycling of the steam among a plurality of autoclaves in the autoclaved curing process of the calcium silicate board is difficult to realize only by means of the experience of workers, and the production cost is higher when the autoclaved curing of the calcium silicate board is carried out by only depending on fresh steam.
Therefore, a new calcium silicate board autoclaved curing system is needed.
Disclosure of Invention
The embodiment of the application provides a calcium silicate board evaporates and presses maintenance system, and calcium silicate board evaporates and presses maintenance system can automatic accurate temperature of adjusting still cauldron and realize that steam recycles between a plurality of still kettles, improves steam utilization ratio, reduces the cost that calcium silicate board evaporates the pressure maintenance process.
The calcium silicate board that this application embodiment provided evaporates pressure maintenance system includes:
the multiple autoclave kettles are used for performing autoclave curing on the calcium silicate board;
the steam-pouring main pipeline is connected with the plurality of still kettles through corresponding steam-pouring branch pipelines respectively, waste steam formed by the still kettles after the autoclaved curing process flows into the still kettles in the autoclaved curing process through the steam-pouring main pipeline for recycling, and a steam-pouring valve is arranged corresponding to each still kettle;
the steam conveying pipelines are respectively and correspondingly connected with the plurality of still kettles, each still kettle is provided with an air inlet valve corresponding to the steam conveying pipeline, and the air inlet valves are used for regulating the flow of fresh steam flowing into the still kettles in the still curing process;
and the controller controls the air-pouring valve to adjust the flow of the waste steam flowing out of or into the autoclave and controls the air inlet valve to adjust the flow of the fresh steam flowing into the autoclave, so that the calcium silicate plate autoclaved curing system can complete the autoclaved curing process of the calcium silicate plates in the autoclaves.
According to one aspect of the embodiment of the application, the automatic opening and closing device further comprises a plurality of door opening and closing mechanisms, the door opening and closing mechanisms are respectively arranged corresponding to the plurality of still kettles, each door opening and closing mechanism comprises a first sensor, and the first sensors detect the positions of the still kettles;
when the calcium silicate plate of the first still kettle is completely put into the multiple still kettles and the first still kettle is closed in place, the first sensor sends a door-closing-in-place feedback signal to the controller;
the controller generates a steam curing control signal according to the door closing in-place feedback signal, and the first still kettle enters the steam curing process according to the steam curing control signal.
According to one aspect of the embodiment of the application, the steam-curing control signal comprises a first steam-curing control signal and a second steam-curing control signal;
when the acquired environment temperature signal is greater than a first temperature threshold value, the controller generates a first steam-curing control signal;
when the acquired environment temperature signal is less than or equal to a second temperature threshold value, the controller generates a second steam-curing control signal;
and the first temperature threshold is greater than or equal to the second temperature threshold.
According to one aspect of the embodiment of the application, the first autoclave enters a first autoclave curing process according to a first steam curing control signal, the first autoclave curing process comprises a steam curing process,
the steam curing process comprises at least one temperature rising stage and at least one heat preservation stage after the temperature rising stage.
According to one aspect of the embodiment of the application, the first autoclave enters a second autoclave curing process according to a second steam curing control signal, the second autoclave curing process comprises a precuring process and a steam curing process,
the pre-curing process comprises at least one first temperature-raising stage and at least one second heat-preserving stage after the first temperature-raising stage;
the steam curing process comprises at least one second temperature-rising stage and at least one second heat-preserving stage after the second temperature-rising stage.
According to one aspect of the embodiment of the application, the steam curing process comprises at least one temperature rise stage and at least one heat preservation stage after the temperature rise stage;
when the first still kettle enters the temperature rise stage, the controller obtains the target temperature and the temperature rise time of the temperature rise stage, and the temperature rise rate of the first still kettle is obtained through calculation according to the target temperature and the temperature rise time.
According to one aspect of the embodiment of the application, when the first still kettle is in a temperature rising stage and the second still kettle finishes the process of still curing and is ready to discharge waste steam, a first feedback signal is sent to the controller;
when the steam pressure curing process of the second still kettle is finished and the waste steam is to be discharged, the controller obtains the first kettle internal pressure information of the first still kettle and the second kettle internal pressure information of the second still kettle according to the first feedback signal;
processing the pressure information in the first kettle and the pressure information in the second kettle to obtain the pressure in the first still kettle and the pressure in the second still kettle;
when the pressure in the first still kettle is lower than the pressure in the second still kettle, the controller generates a first pressure control signal, and according to the first pressure control signal, the air vent valve of the first still kettle and the air vent valve of the second still kettle are both opened, so that the waste steam in the second still kettle flows into the first still kettle for heating the first still kettle;
when the pressure in the first still kettle is equal to the pressure in the second still kettle, the controller generates a second pressure control signal, the air valve of the first still kettle and the air valve of the second still kettle are kept closed according to the second pressure control signal, and the air inlet valve of the first still kettle is opened according to the second pressure control signal to introduce fresh steam into the first still kettle.
According to one aspect of the embodiment of the application, when the waste steam in the second still kettle flows into the first still kettle, the controller adjusts the opening of the air relief valve of the first still kettle and/or the opening of the air relief valve of the second still kettle according to the temperature rise rate of the first still kettle;
when the air inlet valve of the first still kettle is opened to introduce fresh steam into the first still kettle, the controller adjusts the opening degree of the air inlet valve of the first still kettle according to the temperature rise rate of the first still kettle.
According to one aspect of the embodiment of the application, the system further comprises a plurality of exhaust pipelines respectively and correspondingly connected with the plurality of autoclaves, each autoclave is correspondingly provided with an exhaust valve, and the exhaust valve adjusts the flow of the waste steam exhausted from the autoclaves through the exhaust pipelines;
and opening an exhaust valve of the second still kettle according to the second pressure control signal, and discharging the residual waste steam in the second still kettle out of the second still kettle through an exhaust pipeline of the second still kettle.
According to one aspect of the embodiment of the application, the system further comprises a plurality of emptying pipelines, wherein the plurality of emptying pipelines are correspondingly connected with the plurality of still kettles respectively and are communicated with the ambient air, each still kettle is correspondingly provided with an emptying valve, and when the emptying valves are opened, the still kettles are communicated with the ambient air through the emptying valves and the emptying pipelines;
when the second still kettle discharges the residual waste steam through the exhaust gas pipeline of the second still kettle, the controller acquires and processes the pressure information in the second still kettle;
when the kettle internal pressure of the second still kettle is zero, sending a tail gas exhaust end feedback signal to the controller;
and the controller controls an emptying valve of the second still kettle to be opened according to the tail gas exhaust end feedback signal, so that the second still kettle is communicated with the ambient air.
According to one aspect of the embodiment of the application, when the first still kettle enters the heat preservation stage, the controller controls the air relief valve and the air inlet valve of the first still kettle to be closed.
According to one aspect of the embodiment of the application, the calcium silicate plate autoclaved curing system further comprises an upper computer electrically connected with the controller, and the upper computer comprises one or more of a process parameter display module, a control instruction input module and a danger alarm module.
Drawings
Other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.
FIG. 1 is a schematic structural diagram of an autoclaved curing system for calcium silicate boards in the embodiment of the present application;
in the figure:
calcium silicate board evaporates presses maintenance system-1
A first still kettle-111; a second still kettle-112; a third still kettle-113; a fourth still kettle-114; a fifth autoclave-115; a sixth autoclave-116;
a main gas-pouring pipeline-12; a gas-pouring branch pipeline-121; gas pouring valve-122
A main steam delivery line-13; a vapor delivery line-131; an intake valve-132;
a main exhaust gas pipeline-14; an exhaust gas pipeline-141; an exhaust valve-142;
emptying the main pipeline-15; evacuation line-151; an exhaust valve-152;
a first sensor-16;
a pressure transmitter-17;
a temperature sensor-18;
controller-19; a central processing unit-191; an input and output module-192; an analog signal input module-193; an analog signal output module-194; an upper computer-195.
The dashed lines in fig. 1 are electrical connection schematic lines.
Detailed Description
The inventor finds that in the process of research, in the production process of the calcium silicate board, the opening of a valve for steam to flow into a still kettle is controlled by a worker in an experience or semi-automatic and manual assistance mode, too much or too little steam is easily introduced into the still kettle due to misoperation, the temperature rise rate of the still kettle is inaccurate due to inaccurate flow regulation of the steam flowing into the still kettle, and the process of recycling waste steam formed by any still kettle among the plurality of still kettles after the completion of the still maintenance can not be realized according to the process of the still maintenance in which the plurality of still kettles are respectively located.
In order to solve the above problems, the present invention is proposed, and the structure of the calcium silicate board autoclave curing system and the control of the autoclave curing process in the calcium silicate board autoclave curing system in the embodiment of the present invention will be described in detail with reference to fig. 1.
The embodiment of the application provides a calcium silicate board evaporates presses maintenance system 1, including a plurality of autoclaves in this calcium silicate board evaporates the maintenance system, evaporate the autoclave and be used for evaporating the maintenance to calcium silicate board, need send calcium silicate board into the autoclave and carry out the autoclaved maintenance after the process such as flowing thick liquid system board, panel compaction after slurrying in the general calcium silicate board production process to let in steam in evaporating the autoclave, silicon dioxide in the calcium silicate board takes place hydrothermal reaction with calcium hydroxide and water under the autoclave high temperature high pressure and high humidity condition, produce material such as a certain quantity of tobermorite crystal, increase the intensity of calcium silicate board.
The calcium silicate board still pressure curing system 1 further comprises an air-pouring main pipeline 12, the multiple still kettles are connected to the air-pouring main pipeline 12 through corresponding air-pouring branch pipelines 121 respectively, waste steam formed by the still kettles with the finished still pressure curing process flows into the still kettles in the still pressure curing process through the air-pouring main pipeline 12 for recycling, and an air-pouring valve 122 is arranged corresponding to each still kettle. The flow of waste steam into and out of the autoclave can be controlled by controlling the opening of the air dump valve 122. In some embodiments of the present application, as shown in fig. 1, the air vent valve 122 corresponding to each autoclave is located on the air vent branch corresponding to each autoclave.
The calcium silicate board autoclaved curing system 1 further comprises a plurality of steam conveying pipelines 131, the plurality of steam conveying pipelines 131 are respectively and correspondingly connected to the plurality of autoclaves, each autoclave is provided with an air inlet valve 132 corresponding to the steam conveying pipeline 131, and the air inlet valve 132 regulates the flow of fresh steam flowing into the autoclave in the autoclaved curing process. In some embodiments of the present application, referring to fig. 1, a main steam conveying pipeline 13 is further disposed in the calcium silicate board autoclave curing system 1, one end of the main steam conveying pipeline 13 is a fresh steam input end, the other end of the main steam conveying pipeline is respectively connected to steam conveying pipelines 131 correspondingly connected to a plurality of autoclaves, and fresh steam is finally input into the corresponding autoclaves through the main steam conveying pipeline and then through the steam conveying pipelines 131.
The calcium silicate board autoclaved curing system 1 further comprises a controller 19, wherein the controller 19 controls the air vent valve 122 to regulate the flow of waste steam flowing out of or into the autoclave and controls the air inlet valve 132 to regulate the flow of fresh steam flowing into the autoclave, so that the calcium silicate board autoclaved curing system 1 completes the autoclaved curing process of calcium silicate boards in the plurality of autoclaves.
In some optional embodiments, the calcium silicate board autoclave curing system 1 further includes a plurality of exhaust gas pipes 141 respectively connected to the plurality of autoclaves, each autoclave is provided with an exhaust valve 142, and the exhaust valve 142 adjusts the flow of the exhaust steam exhausted from the autoclave through the exhaust gas pipe 141. In some optional embodiments, as shown in fig. 1, an exhaust gas main pipeline 14 is further provided in the calcium silicate board autoclave curing system 1, one end of the exhaust gas main pipeline 14 is connected to each of the exhaust gas pipelines 141, and the other end of the exhaust gas main pipeline 14 is connected to an exhaust gas treatment device. The exhaust steam discharged from the still kettle is discharged into the main exhaust gas discharge pipeline 14 through the exhaust gas discharge pipeline 141 corresponding to the still kettle, and then is discharged into the exhaust gas treatment device for treatment.
In some optional embodiments, the calcium silicate board autoclave curing system 1 further includes a plurality of evacuation pipes 151, the plurality of evacuation pipes 151 are respectively connected to a plurality of autoclaves and are in communication with the ambient air, an evacuation valve 152 is disposed in correspondence to each autoclave, and when the evacuation valve 152 is opened, the autoclaves are in communication with the ambient air through the evacuation valve 152 and the evacuation pipes 151. In some optional embodiments, as shown in fig. 1, an evacuation main line 15 is further disposed in the calcium silicate board autoclave curing system 1, and one end of the evacuation main line 15 is communicated with ambient air, and the other end of the evacuation main line 15 is connected to the plurality of evacuation lines 151. The evacuation valve 152 is disposed on the evacuation pipeline 151, and the communication and the blockage between the inside of the autoclave and the ambient air are respectively realized by controlling the opening and the closing of the evacuation valve 152.
In some optional embodiments, the calcium silicate board autoclave curing system 1 further includes a plurality of door opening and closing mechanisms, the door opening and closing mechanisms are respectively arranged corresponding to the plurality of autoclaves, the door opening and closing mechanisms include a first sensor 16, and the first sensor 16 detects the position of the autoclave door. In some embodiments, a door is provided in the direction of the calcium silicate plate of the still kettle, and the still kettle is provided with a door opening and closing mechanism corresponding to the single kettle door, wherein the door opening and closing mechanism is provided with a first sensor 16. In other embodiments, two doors are oppositely arranged in the direction of the calcium silicate board entering the autoclave, and as shown in fig. 1, two door opening and closing mechanisms are arranged corresponding to the two doors of the autoclave, and each door opening and closing mechanism is provided with a first sensor 16.
In some optional embodiments, the calcium silicate board autoclave curing system 1 further includes a plurality of pressure transmitters 17, the plurality of pressure transmitters 17 are respectively disposed corresponding to the plurality of autoclaves, and the pressure transmitters 17 detect physical parameters of the pressure in the autoclave and convert the physical parameters into information of the pressure in the autoclave, and feed the information back to the controller 19.
In some optional embodiments, the calcium silicate board autoclave curing system 1 further includes a plurality of temperature sensors 18, the plurality of temperature sensors 18 are respectively disposed corresponding to the plurality of autoclaves, and the temperature sensors 18 detect physical parameters of the temperature in the autoclave and convert the physical parameters into information of the temperature in the autoclave, and feed the information back to the controller 19.
In some alternative embodiments, the controller 19 is a PLC controller 19, and the PLC controller 19 includes a central processor 191, an input and output module 192, an analog signal input module 193, and an analog signal output module 194. The air dumping valves 122 and the air inlet valves 132 of the plurality of autoclaves are electrically connected with the analog signal output module 194, and the PLC controller 19 outputs valve opening degree control signals to the air dumping valves 122 and the air inlet valves 132 through the analog signal output module 194 to control the valve opening degrees of the air dumping valves 122 and the air inlet valves 132.
In some embodiments, the plurality of autoclave evacuation valves 152 are electrically connected to the analog signal output module 194 and controlled by the controller 19. In still other embodiments, the evacuation valves 152 of the plurality of autoclaves are not electrically connected to the analog signal output module 194 and are not controlled by the controller 19, so that manual control is achieved.
In some embodiments, the first sensors 16 of the autoclaves in the calcium silicate board autoclave curing system 1 are each electrically connected to the input and output module 192.
In some embodiments, a plurality of temperature sensors 18 and pressure transmitters 17 disposed corresponding to a plurality of autoclaves are electrically connected to the analog signal input module 193.
In some embodiments, the calcium silicate board autoclave curing system 1 further includes an upper computer 195 electrically connected to the controller 19, and the upper computer 195 includes one or more of a process parameter display module, a control instruction input module, and a danger alarm module.
The following will exemplify the control process of the autoclave curing process for a plurality of autoclaves in the calcium silicate board autoclave curing system 1.
Referring to fig. 1, in some alternative embodiments, calcium silicate board autoclave curing system 1 includes six autoclaves, namely, a first autoclave 111, a second autoclave 112, a third autoclave 113, a fourth autoclave 114, a fifth autoclave 115, and a sixth autoclave 116.
The whole autoclave curing process control flow of the first autoclave 111 will be described as an example.
When the calcium silicate board of the first still kettle 111 finishes entering the kettle and the first still kettle 111 is closed in place, the first sensor 16 sends a door closing in-place feedback signal to the controller 19;
the controller 19 generates a steam curing control signal according to the door closing in-place feedback signal, and the first still kettle 111 enters the steam curing process according to the steam curing control signal.
In some optional embodiments, the steam-curing control signal comprises a first steam-curing control signal and a second steam-curing control signal;
when the acquired environment temperature signal is greater than the first temperature threshold, the controller 19 generates a first steam-curing control signal;
when the acquired environment temperature signal is less than or equal to the second temperature threshold, the controller 19 generates a second steam-curing control signal;
and the first temperature threshold is greater than or equal to the second temperature threshold.
In the autoclave curing process of the calcium silicate board, when the ambient temperature is greater than the first temperature threshold, the ambient temperature is generally higher, for example, the ambient temperature in summer is higher. Because the environmental temperature is higher, steam is not needed to be introduced into the still kettle at the moment, the temperature of the still kettle is increased, and the wet plate blank entering the calcium silicate plate of the still kettle is pre-cured, and only the still kettle without the steam is needed to be stood for preliminary dehydration under the normal temperature and normal pressure environment, so that the wet plate blank of the calcium silicate plate has preliminary strength.
In the autoclaved curing process of the calcium silicate board, when the environmental temperature is less than or equal to the second temperature threshold value, the environmental temperature is generally low, for example, the environmental temperature is low in cold winter, and at the moment, steam is introduced into the autoclave to pre-cure a wet board blank entering the autoclave calcium silicate board by increasing the temperature of the autoclave.
Therefore, in some embodiments, the first autoclave 111 enters the first autoclave curing process according to the first steam curing control signal, the first autoclave curing process includes a steam curing process, and the steam curing process includes at least one temperature rising stage and at least one temperature maintaining stage after the temperature rising stage.
In other embodiments, the first autoclave 111 enters a second autoclave curing process according to the second steam curing control signal, the second autoclave curing process includes a pre-curing process and a steam curing process, the pre-curing process includes at least one first temperature-raising stage and at least one second temperature-maintaining stage after the first temperature-raising stage; the steam curing process comprises at least one second temperature-rising stage and at least one second heat-preserving stage after the second temperature-rising stage.
When the first autoclave 111 enters the temperature rise stage, the controller 19 obtains the target temperature and the temperature rise time of the temperature rise stage, and calculates the temperature rise rate of the first autoclave 111 according to the target temperature and the temperature rise time. In one example, the target temperature of the ramp-up phase and the ramp-up time have been stored as process fixed conditions in the controller 19; in another example, the target temperature and the warming time in the warming phase are input through a control instruction input module of the upper computer 195, and the controller 19 acquires the target temperature and the warming time in the warming phase from the upper computer 195.
For example, when the first autoclave 111 is in the temperature raising stage and the second autoclave 112 finishes the autoclave curing process and waits for the exhaust steam to be discharged, a first feedback signal is sent to the controller 19;
when the steam pressure curing process of the second still kettle 112 is finished and the waste steam is to be discharged, the controller 19 obtains the first kettle internal pressure information of the first still kettle 111 and the second kettle internal pressure information of the second still kettle 112 according to the first feedback signal;
processing the pressure information in the first kettle and the pressure information in the second kettle to obtain the pressure in the first autoclave 111 and the pressure in the second autoclave;
when the pressure in the first still kettle 111 is lower than the pressure in the second still kettle 112, the controller 19 generates a first pressure control signal, and the air relief valve 122 of the first still kettle 111 and the air relief valve 122 of the second still kettle 112 are both opened according to the first pressure control signal, so that the waste steam in the second still kettle 112 flows into the first still kettle 111 for heating the first still kettle 111;
when the pressure in the first still kettle 111 is equal to the pressure in the second still kettle 112, the controller 19 generates a second pressure control signal, the air relief valve 122 of the first still kettle 111 and the air relief valve 122 of the second still kettle 112 are both kept closed according to the second pressure control signal, and the air inlet valve 132 of the first still kettle 111 is opened according to the second pressure control signal to introduce fresh steam into the first still kettle 111.
In the above example:
when the waste steam in the second autoclave 112 flows into the first autoclave 111, the controller 19 adjusts the opening degree of the air relief valve 122 of the first autoclave 111 and/or the air relief valve 122 of the second autoclave 112 according to the temperature rise rate of the first autoclave 111;
when the air inlet valve 132 of the first still kettle 111 is opened to introduce fresh steam into the first still kettle 111, the controller 19 adjusts the opening degree of the air inlet valve 132 of the first still kettle 111 according to the temperature rise rate of the first still kettle 111.
Note that the first still kettle 111 being in the temperature increasing stage includes a case where the first still kettle 111 is just entering the temperature increasing stage or being in the temperature increasing stage. When the first still kettle 111 is in a temperature rising stage, and the still kettles except the first still kettle 111 in the six still kettles are in a state in which the autoclave curing process is finished and the waste steam is to be discharged, the waste steam in the still kettles can be recycled through the first still kettle 111 until the pressures in the still kettles discharging the waste steam are equal to the pressures in the first still kettle 111, and the air relief valve 122 of the first still kettle 111 and the air relief valve 122 of the second still kettle 112 are closed.
At this time, the temperature sensor 18 of the first autoclave 111 sends a temperature feedback signal of the first autoclave 111 to the controller 19, the controller 19 determines whether the first autoclave 111 is still in the temperature increasing stage according to the temperature feedback signal of the first autoclave 111, and if the first autoclave 111 is still in the temperature increasing stage, the temperature increasing rate of the first autoclave 111 of the controller 19 adjusts the opening degree of the air inlet valve 132 of the first autoclave 111 to continuously introduce fresh steam into the first autoclave 111. If the first still kettle 111 is in the heat-preservation stage, the controller 19 controls the air inlet valve 132, the air vent valve 122, the air outlet valve 142, and the air exhaust valve 152 of the first still kettle 111 to be closed, so that the first still kettle 111 is maintained at the target temperature substantially in the adiabatic constant pressure condition for the time required for the heat-preservation stage.
In this example, the vent valve 142 of the second still pot 112 is opened according to the second pressure control signal, and the remaining exhaust steam in the second still pot 112 is discharged out of the second still pot 112 through the exhaust gas line 141 of the second still pot 112. In other examples, if the third still kettle 113 enters the temperature rise stage and the kettle internal pressure of the third still kettle 113 is lower than the kettle internal pressure of the second still kettle 112, the controller 19 generates a third pressure control signal, controls the air vent valve 122 of the second still kettle 112 and the air vent valve 122 of the third still kettle 113 to be opened according to the third pressure control signal, continues to recycle the residual steam in the second still kettle 112 in the third still kettle 113, and does not open the air vent valve 142 of the second still kettle 112 according to the third control signal.
When the second still kettle 112 discharges the remaining exhaust steam through the exhaust gas pipeline 141 of the second still kettle 112, the controller 19 acquires and processes the kettle internal pressure information of the second still kettle 112;
when the kettle internal pressure of the second still kettle 112 is zero, sending a tail gas exhaust end feedback signal to the controller 19;
the controller 19 controls the evacuation valve 152 of the second still kettle 112 to open according to the exhaust end feedback signal of the second still kettle 112, so that the second still kettle 112 is communicated with the ambient air. In this example, the evacuation valve 152 is electrically connected to the controller 19, and the controller 19 controls the opening and closing of the evacuation valve 152.
When the second still kettle 112 is communicated with the ambient air for a preset time, and the pressure in the second still kettle 112 is ensured to be the same as the atmospheric pressure in the environment, the opening of the kettle door of the second still kettle 112 is performed, so that the calcium silicate plate after the still curing is discharged from the kettle.
Through the control flow, the controller 19 in the whole calcium silicate board autoclaved curing system 1 strictly controls the temperature rise and heat preservation time of each autoclave in the autoclaved curing process, and meanwhile, the controller 19 strictly and accurately controls the temperature rise rate and the steam introduction amount in the temperature rise stage of the autoclaves by controlling the air vent valve 122 to adjust the flow of waste steam flowing out of or into a single autoclave and controlling the air inlet valve 132 to adjust the flow of fresh steam flowing into the single autoclave, so that the autoclaved curing process of the calcium silicate board of the autoclaves is ensured to meet the process requirements, the steam introduction amount is reasonable, the overhigh and overlow temperature in the autoclaves is avoided, and the quality of the calcium silicate board is improved.
Still further, the whole calcium silicate board autoclave curing system 1 comprises a plurality of autoclaves which are respectively connected to the main air-vent pipeline 12 through corresponding air-vent branch pipelines 121, the controller 19 monitors and controls the temperature rise and heat preservation stages in the autoclave curing process of each autoclave in the calcium silicate board autoclave curing system 1 and the waste steam discharge stage after the autoclave curing process is finished, controls the recycling process of the waste steam to be discharged out of the autoclave in the autoclave curing process at the temperature rise stage, realizes the recycling of the waste steam in the autoclave in a single or even a plurality of autoclaves, realizes the comprehensive allocation and recycling of the waste steam generated by the autoclave in the autoclave curing process in the plurality of autoclaves of the whole calcium silicate board autoclave curing system 1, and greatly saves the input amount of fresh steam in the whole calcium silicate board autoclave curing system 1, the production cost of the calcium silicate board is reduced.
In one example, the calcium silicate board autoclave curing system 1 further includes an upper computer 195 electrically connected to the controller 19, and the upper computer 195 includes a process parameter display module, a control instruction input module, and a danger alarm module. The producer can obtain the process parameters such as the temperature, the pressure and the like of each autoclave in the calcium silicate plate autoclave curing system 1 in real time through the process parameter display module to know the actual production condition. The control conditions are adjusted in real time through the control instruction input module, and production is facilitated. When the pressure in the autoclave exceeds the safe pressure range and the temperature in the autoclave is higher or lower than a set threshold value, and other abnormal production phenomena occur, the danger alarm module in the upper computer 195 sends out alarm information to a producer to prompt the producer to check and maintain the calcium silicate plate autoclave curing system 1, so that the production is ensured to continue to be normally carried out, and the defective rate of the calcium silicate plate is reduced.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (12)
1. The calcium silicate board autoclaved curing system is characterized by comprising:
the multiple autoclave kettles are used for performing autoclave curing on the calcium silicate board;
the plurality of the still kettles are respectively connected to the main gas-pouring pipeline through corresponding gas-pouring branch pipelines, waste steam formed by the still kettles after the autoclaved curing process flows into the still kettles in the autoclaved curing process through the main gas-pouring pipeline for recycling, and a gas-pouring valve is arranged corresponding to each still kettle;
the steam conveying pipelines are respectively and correspondingly connected with the plurality of still kettles, each still kettle is provided with an air inlet valve corresponding to the steam conveying pipeline, and the air inlet valve is used for adjusting the flow of fresh steam flowing into the still kettle in the still curing process;
and the controller is used for controlling the air vent valve to adjust the flow of the waste steam flowing out of or into the autoclave and controlling the air inlet valve to adjust the flow of the fresh steam flowing into the autoclave, so that the calcium silicate board autoclaved curing system can complete the autoclaved curing process of the calcium silicate boards in the autoclaves.
2. The calcium silicate board autoclaved curing system of claim 1 further comprising a plurality of door opening and closing mechanisms, said door opening and closing mechanisms being respectively disposed corresponding to said plurality of autoclaves, said door opening and closing mechanisms including a first sensor, said first sensor detecting the position of said autoclave door;
when the calcium silicate plate of a first still kettle in the plurality of still kettles is completely put into the kettle and the first still kettle is closed in place, the first sensor sends a door-closing-in-place feedback signal to the controller;
and the controller generates a steam curing control signal according to the door closing in-place feedback signal, and the first still kettle enters a steam curing process according to the steam curing control signal.
3. The autoclaved curing system of the calcium silicate board as set forth in claim 2,
the steam-curing control signal comprises a first steam-curing control signal and a second steam-curing control signal;
when the acquired environment temperature signal is greater than a first temperature threshold value, the controller generates a first steam-curing control signal;
when the acquired environment temperature signal is less than or equal to a second temperature threshold value, the controller generates a second steam-curing control signal;
wherein the first temperature threshold is greater than or equal to the second temperature threshold.
4. The autoclaved curing system of the calcium silicate board as set forth in claim 3,
the first still kettle enters a first still curing process according to the first steam curing control signal, the first still curing process comprises a steam curing process,
the steam curing process comprises at least one temperature rising stage and at least one heat preservation stage after the temperature rising stage.
5. The autoclaved curing system of the calcium silicate board as set forth in claim 3,
the first autoclave enters a second autoclave curing process according to the second steam curing control signal, the second autoclave curing process comprises a precuring process and a steam curing process,
the pre-culture process comprises at least one first temperature-raising stage and at least one second heat-preservation stage after the first temperature-raising stage;
the steam curing process comprises at least one second temperature-rising stage and at least one second heat-preserving stage after the second temperature-rising stage.
6. The autoclaved curing system of the calcium silicate board as set forth in claim 2,
the steam curing process comprises at least one temperature rise stage and at least one heat preservation stage after the temperature rise stage;
when the first still kettle enters the temperature rise stage, the controller obtains the target temperature and the temperature rise time of the temperature rise stage, and the temperature rise rate of the first still kettle is obtained through calculation according to the target temperature and the temperature rise time.
7. The autoclaved curing system of the calcium silicate board as set forth in claim 6,
when the first still kettle is in the temperature rise stage and the second still kettle finishes the still curing process and the waste steam is discharged, sending a first feedback signal to the controller;
when the steam pressure curing process of the second still kettle is finished and the waste steam is to be discharged, the controller obtains first kettle internal pressure information of the first still kettle and second kettle internal pressure information of the second still kettle according to the first feedback signal;
processing the first kettle internal pressure information and the second kettle internal pressure information to obtain a first still kettle internal pressure and a second still kettle internal pressure;
when the pressure in the first still kettle is lower than the pressure in the second still kettle, the controller generates a first pressure control signal, and according to the first pressure control signal, the air vent valve of the first still kettle and the air vent valve of the second still kettle are both opened, so that waste steam in the second still kettle flows into the first still kettle for heating the first still kettle;
when the pressure in the first still kettle is equal to the pressure in the second still kettle, the controller generates a second pressure control signal, the air vent valve of the first still kettle and the air vent valve of the second still kettle are kept closed according to the second pressure control signal, and the air inlet valve of the first still kettle is opened according to the second pressure control signal to introduce fresh steam into the first still kettle.
8. The autoclaved curing system of the calcium silicate board as set forth in claim 7,
when the waste steam in the second still kettle flows into the first still kettle, the controller adjusts the opening degree of the air relief valve of the first still kettle and/or the air relief valve of the second still kettle according to the temperature rise rate of the first still kettle;
when the air inlet valve of the first still kettle is opened to introduce fresh steam into the first still kettle, the controller adjusts the opening degree of the air inlet valve of the first still kettle according to the temperature rise rate of the first still kettle.
9. The calcium silicate board autoclaved curing system according to claim 8, further comprising a plurality of exhaust gas pipelines respectively connected to the plurality of autoclaves, each of the autoclaves being provided with an exhaust valve, the exhaust valve regulating the flow of exhaust steam exhausted from the autoclave through the exhaust gas pipeline;
and according to the second pressure control signal, the exhaust valve of the second still kettle is opened, and the residual waste steam in the second still kettle is discharged out of the second still kettle through an exhaust pipeline of the second still kettle.
10. The calcium silicate board autoclaved curing system according to claim 9, further comprising a plurality of evacuation pipelines respectively connected to the plurality of autoclaves and communicating with the ambient air, each of the autoclaves being provided with an evacuation valve, and when the evacuation valve is opened, the autoclaves communicating with the ambient air through the evacuation valve and the evacuation pipeline;
when the second still kettle discharges the residual waste steam through the exhaust gas pipeline of the second still kettle, the controller acquires and processes the kettle internal pressure information of the second still kettle;
when the kettle internal pressure of the second still kettle is zero, sending a tail gas exhaust end feedback signal to the controller;
and the controller controls an emptying valve of the second still kettle to be opened according to the tail gas exhaust end feedback signal, so that the second still kettle is communicated with the ambient air.
11. The autoclaved curing system of the calcium silicate board as set forth in claim 6,
and when the first still kettle enters the heat preservation stage, the controller controls the air pouring valve and the air inlet valve of the first still kettle to be closed.
12. The calcium silicate board autoclaved curing system as set forth in any one of claims 1 to 11, further comprising an upper computer electrically connected with said controller, said upper computer including one or more of a process parameter display module, a control instruction input module and a danger alarm module.
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Application publication date: 20201127 |