Energy-saving method and system for a ALC production line, and ALC production line

Abstract

The application provides an energy-saving method, an energy-saving system and an ALC production line. When the temperature of steam in a separation pressure container is higher than a set temperature, the method controls a booster pump to be turned on to accelerate the recovery of steam in the separation pressure container to a primary heat exchange container. When the temperature of steam in the primary heat exchange container is higher than a first preset heat exchange temperature and the liquid level in the primary heat exchange container is higher than a first preset heat exchange liquid level, a first heat exchange circulating pump is turned on to make the heat energy of steam in the primary heat exchange container exchange heat with a first heat utilization area. The application controls the booster pump to be turned on to accelerate the recovery of the heat energy of steam in the separation pressure container, reduces the heat energy loss in the recovery and improves the heat energy recovery rate. The recovered high-temperature residual steam is used in the first heat utilization area in the ALC production line, the actual temperature of which is lower than the temperature in the first heat exchange container and the set working temperature of which is higher than the actual temperature, which reduces the energy consumption for heating the first heat utilization area and improves the energy consumption utilization rate.

Description

Technical Field

[0001] This invention relates to the field of energy conservation and environmental protection technology, and in particular to an energy-saving method, energy-saving system, and ALC production line. Background Technology

[0002] The autoclaved lightweight concrete (ALC) industry faces increasingly stringent constraints on energy conservation and emission reduction. Comprehensive energy conservation and environmental inspections have led to production restrictions for some companies. Meeting energy consumption and environmental emission standards is not only a minimum cost requirement for businesses, but also crucial for the development of the automotive industry.

[0003] Factory managers expect proactive energy-saving measures to directly reduce factory energy consumption, but traditional ALC production line equipment consumes a significant amount of energy during production. Therefore, the high energy consumption of ALC production lines is a crucial issue that the industry urgently needs to address. Summary of the Invention

[0004] This invention provides an energy-saving method, energy-saving system, and ALC production line to solve the problem of high energy consumption in existing ALC production lines, realize the reuse of energy consumption in ALC production lines, and improve energy utilization efficiency.

[0005] This invention provides an energy-saving method for an ALC production line, comprising:

[0006] When the temperature of the steam in the separation pressure vessel is higher than the set temperature, the booster pump is activated to accelerate the recovery of the steam in the separation pressure vessel to the primary heat exchange vessel; the steam in the separation pressure vessel includes steam discharged from the autoclave of the ALC production line with a pressure lower than the set pressure threshold.

[0007] When the temperature inside the primary heat exchange container is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange container is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump is controlled to start, so that the heat energy in the primary heat exchange container can exchange heat with the first heat-using area, thereby raising the temperature of the first heat-using area; the first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0008] An energy-saving method for an ALC production line provided by the present invention further includes:

[0009] The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange container;

[0010] When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set operating temperature, the second heat exchange circulation pump is controlled to start, so that the condensate in the secondary heat exchange container exchanges heat with the second heat-using area, thereby raising the temperature of the second heat-using area; the second heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0011] An energy-saving method for an ALC production line provided by the present invention further includes:

[0012] The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange container;

[0013] When the liquid level in the secondary heat exchange container reaches the drain level, the drain pump is turned on to use the heat energy of the condensate in the secondary heat exchange container to heat the slurry in the casting area of ​​the ALC production line.

[0014] According to an energy-saving method for an ALC production line provided by the present invention, the second heat-using area includes the resting area in the ALC production line.

[0015] According to an energy-saving method for an ALC production line provided by the present invention, the second heat-using area includes the grouping pre-curing area in the ALC production line.

[0016] According to an energy-saving method for an ALC production line provided by the present invention, the first heat-using area includes a boiler soft water zone.

[0017] The present invention also provides an energy-saving system for an ALC production line, comprising: a controller, a separation pressure vessel, a booster pump, a primary heat exchange vessel, and a first heat exchange circulation pump;

[0018] The controller is used to control the booster pump to start when a first condition is met, and to control the first heat exchange circulation pump to start when a second condition is met; the first condition is that the temperature of the steam in the separation pressure vessel is higher than a set temperature; the second condition is that the temperature in the primary heat exchange vessel is higher than a first preset heat exchange temperature, and the liquid level in the primary heat exchange vessel is higher than a first preset heat exchange liquid level.

[0019] The booster pump is used to accelerate the recovery of steam from the separation pressure vessel to the primary heat exchange vessel;

[0020] The first heat exchange circulation pump is used to exchange heat energy in the primary heat exchange container with the first heat application area; the first heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0021] An energy-saving system for an ALC production line provided by the present invention further includes a secondary heat exchange container and a second heat exchange circulation pump;

[0022] The controller is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the second heat exchange circulation pump to start when a third condition is met; the third condition is that the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set working temperature.

[0023] The second heat exchange circulation pump is used to exchange heat between the condensate in the secondary heat exchange container and the second heat application area; the second heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0024] An energy-saving system for an ALC production line provided by the present invention further includes a secondary heat exchange container and a sewage pump;

[0025] The controller is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the sewage pump to start when a fourth condition is met; the fourth condition is that the liquid level in the secondary heat exchange container reaches the sewage discharge level.

[0026] The sewage pump is used to heat the slurry in the casting area of ​​the ALC production line by utilizing the heat energy of the condensate in the secondary heat exchange container.

[0027] The present invention also provides an ALC production line, including an energy-saving system for any of the above-mentioned ALC production lines.

[0028] The energy-saving method, energy-saving system, and ALC production line provided by this invention, when the temperature of the steam in the separation pressure vessel is higher than the set temperature, controls the booster pump to start, thereby accelerating the recovery of the steam in the separation pressure vessel to the primary heat exchange vessel; when the temperature of the steam in the primary heat exchange vessel is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange vessel is higher than the first preset heat exchange liquid level, controls the first heat exchange circulation pump to start, so that the heat energy of the steam in the primary heat exchange vessel can be exchanged with the first heat-using area. This invention accelerates the recovery of the steam heat energy in the separation pressure vessel by controlling the start of the booster pump, reducing the recovery cycle, thereby reducing heat energy loss during recovery and improving the heat energy recovery rate. By using the recovered high-temperature waste steam in the first heat-using area of ​​the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange vessel and the set operating temperature is higher than the actual temperature, not only is the energy consumption for heating the first heat-using area reduced, but the utilization rate of the waste steam in the autoclave is also improved, effectively reducing the energy consumption of the ALC production line. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is one of the flowcharts illustrating the energy-saving method for an ALC production line provided by the present invention;

[0031] Figure 2 This is the second schematic diagram of the energy-saving method for the ALC production line provided by the present invention;

[0032] Figure 3 This is one of the structural schematic diagrams of the energy-saving system for the ALC production line provided by the present invention;

[0033] Figure 4 This is the second schematic diagram of the energy-saving system for the ALC production line provided by the present invention;

[0034] Figure 5 This is a schematic diagram of the physical structure of the electronic device provided by the present invention.

[0035] Figure label:

[0036] 110: Controller; 120: Separate pressure vessel; 130: Booster pump; 140: Primary heat exchange vessel; 150: First heat exchange circulation pump. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0038] The following is combined Figures 1-4 This invention describes an energy-saving method, an energy-saving system, and an ALC production line.

[0039] The energy-saving method for the ALC production line of the present invention can be implemented by a controller.

[0040] The energy-saving method for the ALC production line provided by this invention achieves energy saving from two aspects. The first aspect is to utilize steam with pressure greater than a set pressure threshold through multi-stage steam transfer between multiple autoclaves to improve steam utilization rate. The second aspect is to recover heat energy from steam with pressure less than a set pressure threshold through a primary heat exchange vessel.

[0041] The set pressure threshold in this invention can be 0.3 MPa. That is, this invention utilizes steam with a pressure of 0.3 MPa or higher discharged from the autoclave through multi-stage steam backflow, and utilizes steam with a pressure of less than 0.3 MPa discharged from the autoclave through heat recovery.

[0042] The multi-stage reverse steam scheme of the first aspect of the energy-saving method for the ALC production line of the present invention includes:

[0043] The pressures of the autoclaves in the ALC production line that are to discharge steam are sorted in ascending order to form a discharge steam request stack; the pressures of the autoclaves in the ALC production line that are to receive steam are sorted in descending order to form a receive steam request stack; the first predetermined amount of steam from the first autoclave in the discharge steam request stack is poured into the first autoclave in the receive steam request stack.

[0044] In the energy-saving method for the ALC production line provided by this invention, the multi-stage steam reversal scheme first sorts the pressure of each autoclave to determine the waiting time of each autoclave. For autoclaves with steam to be reversed, the higher the pressure, the shorter the corresponding waiting time, and the lower the pressure, the longer the corresponding waiting time. For autoclaves with steam to be reversed, the higher the pressure, the longer the corresponding waiting time, and the lower the pressure, the shorter the corresponding waiting time. Based on this, autoclaves with longer waiting times for reversing steam and autoclaves with longer waiting times for reversing steam can be reversed first. That is, the first predetermined amount of steam from the autoclave at the top of the reversing steam request stack is reversed into the autoclave at the top of the reversing steam request stack. This reduces the waiting time of the autoclaves with reversing steam and the waiting time of the autoclaves with reversing steam, reduces energy loss and waste, improves steam utilization, and enables the autoclaves to operate regularly, thus solving the technical problem of low steam utilization in the reversing autoclaves in the prior art. Furthermore, since the first predetermined amount of steam from the first autoclave in the steam discharge request stack is poured into the first autoclave in the steam inlet request stack, during the steam discharge process, steam is discharged from one autoclave and steam is introduced into another autoclave. By carrying out the steam discharge in an orderly manner according to this rule, the phenomenon of "steam crosstalk" can be prevented from occurring when multiple autoclaves waiting to discharge steam discharge simultaneously discharge steam.

[0045] In some embodiments, transferring a predetermined amount of steam from the first autoclave in the steam discharge request stack to the first autoclave in the steam input request stack includes: opening the steam discharge valve corresponding to the first autoclave in the steam discharge request stack; and controlling the opening degree of the steam discharge valve corresponding to the first autoclave in the steam input request stack according to a predetermined pressure rise curve using a fuzzy PID controller, so as to transfer the steam from the first autoclave in the steam discharge request stack to the first autoclave in the steam input request stack.

[0046] The above-mentioned settings of the present invention can dynamically adjust the parameters according to the situation, so that it can stably follow the preset pressure curve throughout the entire pressurization process to meet people's needs.

[0047] It is understandable that traditional PID controllers use fixed parameters, while the fuzzy PID controller of this invention dynamically adjusts the parameters. When setting the pressure rise curve (preset pressure curve), due to process requirements, steam needs to be introduced very slowly in the initial stage of pressure rise to ensure gradual pressure increase and heating of the billet inside the reactor. However, in the later stage of pressure rise, the pressure inside the reactor needs to quickly reach a constant value. Therefore, the rate of change of the pressure rise curve is very different before and after. Traditional PID controllers with fixed parameters will either adjust too slowly in the later stage to follow the earlier stage, or cause oscillations and overshoot in the earlier stage. In other words, the fuzzy PID controller can dynamically adjust its parameters according to the situation, ensuring stable tracking of the preset pressure curve throughout the entire pressure rise process.

[0048] Furthermore, in this invention, after pouring a first predetermined amount of steam from the first autoclave in the steam discharge request stack into the first autoclave in the steam input request stack, the energy-saving method for the ALC production line further includes: pouring a second predetermined amount of steam from the first autoclave in the steam discharge request stack into the second autoclave in the steam input request stack.

[0049] In this invention, after pouring a first predetermined amount of steam from the autoclave with the lowest pressure steam to be poured into the autoclave with the highest pressure steam to be poured into, a second predetermined amount of steam from the autoclave with the lowest pressure steam to be poured into the autoclave with the second highest pressure steam to be poured into. That is, the steam from the autoclave with the lowest pressure steam to be poured can be poured into two autoclaves: one with the highest pressure steam to be poured into and the other with the second highest pressure steam to be poured into. This fully utilizes the steam in the first autoclave in the steam pouring request stack, reducing the amount of steam released into the atmosphere. Compared to the existing single-stage steam pouring, the autoclaves of this invention can perform two steam pouring processes.

[0050] Understandably, in the multi-stage fully automated steam curing process of the AIC production line, the steam from the autoclave that is about to discharge steam after the constant pressure process is completed (e.g., the first autoclave in the discharge steam request stack) is poured into the autoclave that is about to receive steam (e.g., the first autoclave in the input steam request stack) for the first stage of steam discharge. When the pressure between the two autoclaves is balanced, the autoclave that is first in the input steam request stack switches to the steam inlet mode, that is, the steam inlet valve can be opened to allow fresh steam from the boiler to enter the autoclave that is first in the input steam request stack. The residual steam in the first autoclave in the steam discharge request stack is further discharged into the next autoclave awaiting steam discharge (e.g., the second autoclave in the steam discharge request stack) for a second-stage steam discharge. Once the pressure between the two autoclaves is essentially balanced, the autoclave discharging steam in the second stage switches to exhaust mode, venting the residual steam to the atmosphere. The autoclave receiving steam in the second stage (the second autoclave in the steam discharge request stack) can then switch to intake mode, allowing fresh steam from the boiler to enter, or allowing steam from the second autoclave in the steam discharge request stack to be discharged into the autoclave receiving steam in the second stage. Thus, each autoclave can automatically manage residual steam during production according to the production schedule, reducing energy consumption while meeting the requirements of the steam curing production process.

[0051] Furthermore, after pouring a second predetermined amount of steam from the first autoclave in the steam discharge request stack into the second autoclave in the steam input request stack, the energy-saving method for the ALC production line provided by this invention may further include: pouring a third predetermined amount of steam from the second autoclave in the steam discharge request stack into the second autoclave in the steam input request stack. In specific implementation, through the above arrangement, steam can be added twice to the second autoclave in the steam input request stack. Compared with the prior art, there is no need for a steam compressor to pressurize the steam in the discharge autoclave, and the structure is simple, further solving the technical problem of low steam utilization rate in the discharge autoclave in the prior art and reducing energy waste.

[0052] Specifically, a multi-level queuing order stack for pouring out and pouring in can be generated based on the aforementioned pouring out steam request stack and pouring in steam request stack.

[0053] For example, after sorting the pressures of the autoclaves to be filled with steam in ascending order, the resulting pressure order is: Autoclave 2, Autoclave 4, Autoclave 3, and Autoclave 1. After sorting the pressures of the autoclaves to be filled with steam in descending order, the resulting pressure order is: Autoclave 6, Autoclave 8, Autoclave 7, and Autoclave 5. The multi-level queue stack for filling and filling steam, generated according to the above method, is shown in Table 1 below.

[0054]

[0055] Each autoclave can automatically and orderly proceed according to the order of pouring out and pouring into the multi-stage queuing stack in Table 1, and is controlled by a controller to achieve fully automatic multi-stage steam transfer.

[0056] It is understandable that in some implementations, it may also be a third-order or fourth-order, etc.

[0057] In some implementations, it can be determined whether the priority autoclave has met the conditions for steam discharge or refilling. When one autoclave meets the conditions for steam discharge, if the autoclave receiving residual steam (the autoclave receiving refilled steam) does not meet the conditions for refilled steam, the autoclave discharging steam enters the steam discharge waiting stage. If multiple autoclaves have already passed the constant pressure stage and entered the steam discharge stage at this time, they need to wait, that is, to queue for steam discharge.

[0058] When one autoclave meets the conditions for steam pouring, if the autoclave for steam discharge does not yet meet the conditions for steam discharge, the autoclave for steam pouring enters the steam pouring waiting stage. If multiple autoclaves have entered the steam pouring stage after the vacuuming stage, they need to wait, that is, the steam pouring queue is formed.

[0059] When both the steam-exporting autoclave and the steam-in autoclave meet the conditions, the two autoclaves enter the steam-reversing stage. The steam-reversing valve corresponding to the steam-exporting autoclave is fully open, and the steam-reversing valve corresponding to the steam-injecting autoclave is adjusted according to the set pressure rise curve using PID (Proportion Integration Differentiation) to control the steam-reversing speed by following the pressure curve.

[0060] When the pressure of the autoclave that discharges steam (e.g., autoclave No. 2) and the autoclave that receives steam (e.g., autoclave No. 6) reaches pressure balance, the autoclave that discharges steam (e.g., autoclave No. 2) closes its steam discharge valve and enters the second-stage discharge waiting stage. The autoclave that receives steam (e.g., autoclave No. 6) switches from the steam discharge valve to the steam inlet valve and performs PID regulation of the steam inlet according to the set pressure rise curve.

[0061] When the autoclave waiting for steam discharge (e.g., autoclave No. 2) is matched with an autoclave that meets the steam discharge conditions, the second stage of steam discharge begins. The remaining steam after the first stage discharge is discharged into a new autoclave that has been evacuated and has not yet received steam (e.g., autoclave No. 8).

[0062] When the pressure balance is reached between the autoclave that discharges steam (e.g., autoclave No. 2) and the autoclave that receives steam (e.g., autoclave No. 8), the autoclave that discharges steam (e.g., autoclave No. 2) stops discharging steam, and the autoclave that receives steam (e.g., autoclave No. 8) waits for the next autoclave (e.g., autoclave No. 4) that meets the discharge conditions to continue discharging steam into that autoclave (e.g., autoclave No. 8).

[0063] In this embodiment, the first predetermined amount is less than the second predetermined amount. This structural arrangement ensures the normal operation of subsequent processes and improves steam transfer efficiency and energy utilization.

[0064] In one embodiment of the present invention, when a predetermined amount of steam is poured from the first autoclave in the steam discharge request stack into the first autoclave in the steam input request stack, the pressure inside the first autoclave in the steam discharge request stack is greater than the pressure inside the first autoclave in the steam input request stack. Specifically, the pressure difference between the first autoclave in the steam discharge request stack and the first autoclave in the steam input request stack is 0.2 MPa-0.25 MPa. Controlling the pressure difference within 0.2 MPa-0.25 MPa can improve the steam transfer efficiency, thereby improving the turnover efficiency. That is, the next step can be carried out after the steam transfer is basically completed, solving the technical problem of slow steam transfer speed.

[0065] In one embodiment of the present invention, after pouring a first predetermined amount of steam from the first autoclave in the steam discharge request stack into the first autoclave in the steam inlet request stack, the autoclave steam discharge method further includes: closing the steam discharge valve corresponding to the first autoclave in the steam discharge request stack; and controlling the opening degree of the steam inlet valve corresponding to the first autoclave in the steam inlet request stack according to a predetermined pressure rise curve using a fuzzy PID controller, so as to introduce boiler steam into the autoclave with the highest pressure for which steam is to be discharged.

[0066] In practice, the parameters can be dynamically adjusted according to the situation through the above settings, so that it can stably follow the preset pressure curve throughout the entire pressurization process to meet people's needs.

[0067] The heat recovery scheme of the second aspect of the energy-saving method for the ALC production line provided by the present invention will be described below.

[0068] Figure 1 One of the method flowcharts of the energy-saving method for the ALC production line of the present invention is shown.

[0069] like Figure 1 As shown, the energy-saving method for an ALC production line provided by the present invention includes:

[0070] 100. When the temperature of the steam in the separation pressure vessel is higher than the set temperature, control the booster pump to start, so as to accelerate the recovery of the steam in the separation pressure vessel to the primary heat exchange vessel.

[0071] Among them, the pressure vessel is a container that distributes the steam generated during boiler operation to various pipelines, such as an exhaust gas distribution cylinder.

[0072] The temperature of the steam in the separation pressure vessel can be detected by a temperature sensor. The temperature sensor sends the detected temperature value of the steam in the separation pressure vessel to the controller, so that the controller can control the start and stop of the booster pump according to the detected temperature value.

[0073] The steam in the separation pressure vessel includes steam discharged from the autoclave of the ALC production line at a pressure lower than a set pressure threshold.

[0074] The pressure threshold can be set to 0.3 MPa, meaning that the steam separated in the pressure vessel by this invention can be residual steam below 0.3 MPa in the autoclave. It should be noted that since residual steam above 0.3 MPa in the autoclave can be reused through multi-stage steam transfer between multiple autoclaves, the utilization rate is improved. Therefore, this invention mainly focuses on recovering and utilizing the thermal energy of residual steam below 0.3 MPa remaining in the autoclave.

[0075] Specifically, once the autoclave completes one stage of steam transfer (multi-stage steam transfer), the corresponding exhaust valve of that autoclave opens, and steam enters the separation pressure vessel (exhaust steam separator). The corresponding steam exhaust valve on the separation pressure vessel opens, and the temperature sensor detects the steam temperature and sends the detection result to the controller. When the detection result shows that the steam temperature in the separation pressure vessel is higher than the set temperature, the controller controls the booster pump connected to the first-stage heat exchange vessel to start, accelerating the recovery of the high-temperature steam discharged from the separation pressure vessel. When the detection result shows that the steam temperature in the separation pressure vessel is lower than the set temperature, the controller controls the booster pump to shut down.

[0076] It should be noted that when the temperature of the steam in the separation pressure vessel is higher than the set temperature, if the steam flow relies solely on the pressure difference, the flow rate will be slow, the steam recovery cycle will be long, and the prolonged flow recovery process will lead to heat loss in the steam, which is not conducive to the recovery and utilization of thermal energy. In step 100 of this invention, by controlling the start of the booster pump, the recovery of steam in the separation pressure vessel is accelerated, thereby reducing the steam exhaust cycle, reducing heat loss, and improving recovery efficiency. In addition, if the steam exhaust cycle is prolonged, it will affect the operation of the production line. For example, if the exhaust cycle is long, the autoclave will be occupied for a long time and cannot be used in the next stage. Over time, this will affect the normal operation of the production line.

[0077] 200. When the temperature inside the primary heat exchange container is higher than the first preset heat exchange temperature and the liquid level in the primary heat exchange container is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump is controlled to start, so that the heat energy in the primary heat exchange container can be exchanged with the first heat-using area, thereby increasing the temperature of the first heat-using area.

[0078] A heat exchange container is a container that completes the heat exchange of a medium; it can be a heat exchange tank or a heat exchanger.

[0079] The temperature inside the heat exchange container can be detected by a temperature sensor, and the liquid level can be detected by a liquid level sensor.

[0080] Considering that the heat exchange process requires steam flow, and the steam flow needs to reach a certain liquid level, in addition to setting the temperature conditions, the prerequisite is that the liquid level in the primary heat exchange container is higher than the first preset heat exchange liquid level.

[0081] The first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0082] As an optional implementation, the first heat-using area may include the boiler soft water zone. For example, if the operating temperature of the boiler soft water zone is set to 55 degrees Celsius, the actual measured temperature is 40 degrees Celsius, and the temperature inside the primary heat exchange container is 60 degrees Celsius, then the heat energy in the primary heat exchange container can be used to heat the boiler soft water zone, thereby raising the temperature of the boiler soft water, realizing the recovery and reuse of heat energy, and thus reducing the heat energy supply required by the ALC production line.

[0083] Figure 2 The second flowchart of the energy-saving method for the ALC production line is shown.

[0084] like Figure 2 As shown, in some embodiments, the energy-saving method for the ALC production line further includes:

[0085] 300. Control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container.

[0086] 400. When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set working temperature, control the second heat exchange circulation pump to start, so that the condensate in the secondary heat exchange container can exchange heat with the second heat-using area, thereby raising the temperature of the second heat-using area.

[0087] The condensate generated during the autoclave curing process is recycled to a secondary heat exchange container, which can be a hot water tank or an insulated water tank. The condensate recycled to the secondary heat exchange container can be used to provide heat energy for the second heat-using area of ​​the ALC production line, thereby reducing the heat energy consumption of the second heat-using area.

[0088] The second heat application area includes the area in the ALC production line where the actual temperature is lower than the condensate temperature in the second heat exchange container, but the set operating temperature is higher than the actual temperature.

[0089] As an alternative implementation, the second heating zone includes the resting zone in the ALC production line.

[0090] In the ALC production line, the unformed blanks that have been cast in the mold car need to wait in the curing area to settle and form. To accelerate the forming process, the curing area is usually heated by steam pipes to maintain a certain temperature.

[0091] The present invention can use the heat energy of the condensate in the secondary heat exchange container for the above-mentioned curing area, so as to reduce the steam heat energy required to heat the curing area.

[0092] When the second heat-using zone is a static curing zone, if the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the static curing zone is lower than the set static curing temperature, the second heat exchange circulation pump corresponding to the static curing zone is turned on, so that the condensate in the secondary heat exchange container exchanges heat with the static curing zone. At the same time, the axial flow fan in the static curing zone is turned on to accelerate heat dissipation and raise the temperature of the static curing zone.

[0093] As an alternative implementation, the second heat-using area includes the grouping pre-curing area in the ALC production line.

[0094] In the ALC production line, the cut billets need to be pre-cured in groups before entering the autoclave to ensure that the temperature difference before and after entering the autoclave is not too large. This area is usually pre-cured by heating with steam pipes.

[0095] When the second heat-using zone is the grouping pre-curing zone, if the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the grouping pre-curing zone is lower than the set pre-curing temperature, the second heat exchange circulation pump corresponding to the grouping pre-curing zone is turned on, so that the condensate in the secondary heat exchange container exchanges heat with the grouping pre-curing zone. At the same time, the axial flow fan in the grouping pre-curing zone is turned on to accelerate heat dissipation, so as to raise the temperature of the grouping pre-curing zone.

[0096] In some embodiments, the energy-saving method for an ALC production line further includes:

[0097] 500. When the liquid level in the secondary heat exchange container reaches the drain level, control the drain pump to start so as to use the heat energy of the condensate in the secondary heat exchange container to heat the raw slurry in the casting area of ​​the ALC production line.

[0098] It should be noted that the drain level in step 500 is higher than the second preset heat exchange level in step 400. That is, the liquid level in the secondary heat exchange container first reaches the second preset heat exchange level. At this time, the second heat exchange circulation pump is turned on, and the condensate in the secondary heat exchange container exchanges heat with the second heat-using area. During the heat exchange cycle, when the liquid level in the secondary heat exchange circulation pump reaches the drain level, the corresponding drain pump is turned on, and the hot water (condensate) in the secondary heat exchange container supplies water to the casting area, thereby increasing the temperature of the raw slurry in the casting area.

[0099] In an ALC production line, the raw slurry needs to be heated during the batching and casting process, which consumes steam energy. This invention utilizes the heat energy from the condensate recovered during the steam curing process to heat the raw slurry in the casting area, thereby reducing the steam consumption of the casting mixer when heating the raw slurry.

[0100] In the energy-saving method of the ALC production line of the present invention, the heat energy of steam and condensate below 0.3 MPa in the autoclave is recovered and utilized in stages. The first stage is used to heat the soft water in the boiler, the second stage is used to heat the static curing area and the pre-curing area, and the third stage is used to heat the casting area. This reduces the steam consumption of the ALC production line and improves the utilization of heat energy.

[0101] The energy-saving system for the ALC production line provided by the present invention is described below. The energy-saving system described below can be referred to in correspondence with the energy-saving method described above.

[0102] Figure 3 This example illustrates one of the schematic diagrams of an energy-saving system structure for an ALC production line. Figure 4 Example 2: A schematic diagram of an energy-saving system structure for an ALC production line. Figure 3 This is a schematic diagram of the electrical connections for the energy-saving system of the ALC production line. Figure 4 This is a schematic diagram of the piping connections for the energy-saving system of the ALC production line.

[0103] like Figure 3 and Figure 4 As shown, the energy-saving system includes: a controller 110, a separate pressure vessel 120, a booster pump 130, a primary heat exchange vessel 140, and a first heat exchange circulation pump 150.

[0104] The controller 110 is used to control the booster pump 130 to start when a first condition is met, and to control the first heat exchange circulation pump 150 to start when a second condition is met; wherein, the first condition is that the temperature of the steam in the separation pressure vessel 120 is higher than the set temperature; the second condition is that the temperature in the primary heat exchange vessel 140 is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange vessel 140 is higher than the first preset heat exchange liquid level.

[0105] Booster pump 130 is used to accelerate the recovery of steam from separation pressure vessel 120 to primary heat exchange vessel 140;

[0106] The first heat exchange circulation pump 150 is used to exchange heat energy in the primary heat exchange container 140 with the first heat application area; wherein, the first heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0107] In some embodiments, the energy-saving system of the ALC production line further includes: a secondary heat exchange container and a second heat exchange circulation pump;

[0108] The controller 110 is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the second heat exchange circulation pump to start when a third condition is met; wherein, the third condition is that the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set working temperature.

[0109] The second heat exchange circulation pump is used to exchange heat between the condensate in the secondary heat exchange container and the second heat application area; the second heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0110] In some embodiments, the energy-saving system of the ALC production line further includes: a sewage pump;

[0111] The controller 110 is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the sewage pump to start when the fourth condition is met; wherein, the fourth condition is that the liquid level in the secondary heat exchange container reaches the sewage level;

[0112] The sewage pump is used to heat the slurry in the casting area of ​​the ALC production line by utilizing the heat energy of the condensate in the secondary heat exchanger.

[0113] On the other hand, the present invention also provides an ALC production line, which includes any of the above-mentioned energy-saving systems.

[0114] The present invention also provides an electronic device, which is described below.

[0115] Figure 5 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 5 As shown, the electronic device may include: a processor 510, a communication interface 520, a memory 530, and a communication bus 540, wherein the processor 510, the communication interface 520, and the memory 530 communicate with each other via the communication bus 540. The processor 510 can call logical instructions in the memory 530 to execute an energy-saving method for the ALC production line, the method including:

[0116] When the temperature of the steam in the separation pressure vessel 120 is higher than the set temperature, the booster pump 130 is turned on to accelerate the recovery of the steam in the separation pressure vessel 120 to the primary heat exchange vessel 140; the steam in the separation pressure vessel 120 includes steam discharged from the autoclave of the ALC production line with a pressure lower than the set pressure threshold.

[0117] When the temperature inside the primary heat exchange container 140 is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange container 140 is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump 150 is controlled to start, so that the heat energy in the primary heat exchange container 140 can exchange heat with the first heat-using area, thereby raising the temperature of the first heat-using area; the first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0118] The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange vessel;

[0119] When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set operating temperature, the second heat exchange circulation pump is controlled to start, so that the condensate in the secondary heat exchange container exchanges heat with the second heat-using area, thereby raising the temperature of the second heat-using area; the second heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0120] When the liquid level in the secondary heat exchange container reaches the drain level, the drain pump is turned on to use the heat energy of the condensate in the secondary heat exchange container to heat the slurry in the casting area of ​​the ALC production line.

[0121] Furthermore, the logical instructions in the aforementioned memory 530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0122] On the other hand, the present invention also provides a computer program product, the computer program product comprising a computer program that can be stored on a non-transitory computer-readable storage medium, wherein when the computer program is executed by a processor, the computer is able to execute the energy-saving method for the ALC production line provided by the above methods, the method comprising:

[0123] When the temperature of the steam in the separation pressure vessel 120 is higher than the set temperature, the booster pump 130 is turned on to accelerate the recovery of the steam in the separation pressure vessel 120 to the primary heat exchange vessel 140; the steam in the separation pressure vessel 120 includes steam discharged from the autoclave of the ALC production line with a pressure lower than the set pressure threshold.

[0124] When the temperature inside the primary heat exchange container 140 is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange container 140 is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump 150 is controlled to start, so that the heat energy in the primary heat exchange container 140 can exchange heat with the first heat-using area, thereby raising the temperature of the first heat-using area; the first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0125] The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange vessel;

[0126] When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set operating temperature, the second heat exchange circulation pump is controlled to start, so that the condensate in the secondary heat exchange container exchanges heat with the second heat-using area, thereby raising the temperature of the second heat-using area; the second heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0127] When the liquid level in the secondary heat exchange container reaches the drain level, the drain pump is turned on to use the heat energy of the condensate in the secondary heat exchange container to heat the slurry in the casting area of ​​the ALC production line.

[0128] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the energy-saving method for the ALC production line provided by the methods described above, the method comprising:

[0129] When the temperature of the steam in the separation pressure vessel 120 is higher than the set temperature, the booster pump 130 is turned on to accelerate the recovery of the steam in the separation pressure vessel 120 to the primary heat exchange vessel 140; the steam in the separation pressure vessel 120 includes steam discharged from the autoclave of the ALC production line with a pressure lower than the set pressure threshold.

[0130] When the temperature inside the primary heat exchange container 140 is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange container 140 is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump 150 is controlled to start, so that the heat energy in the primary heat exchange container 140 can exchange heat with the first heat-using area, thereby raising the temperature of the first heat-using area; the first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the first heat exchange container and the set operating temperature is higher than the actual temperature.

[0131] The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange vessel;

[0132] When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set operating temperature, the second heat exchange circulation pump is controlled to start, so that the condensate in the secondary heat exchange container exchanges heat with the second heat-using area, thereby raising the temperature of the second heat-using area; the second heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the second heat exchange container and the set operating temperature is higher than the actual temperature.

[0133] When the liquid level in the secondary heat exchange container reaches the drain level, the drain pump is turned on to use the heat energy of the condensate in the secondary heat exchange container to heat the slurry in the casting area of ​​the ALC production line.

[0134] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0135] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0136] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An energy-saving system for an ALC production line, characterized in that, include: Controller, separate pressure vessel, booster pump, primary heat exchange vessel, and primary heat exchange circulation pump; For steam with pressure less than a set pressure threshold, heat energy is recovered through a primary heat exchange container. The controller is used to control the booster pump to start when a first condition is met, and to control the first heat exchange circulation pump to start when a second condition is met. The first condition is that the temperature of the steam in the separation pressure container is higher than a set temperature. The second condition is that the temperature in the primary heat exchange container is higher than a first preset heat exchange temperature, and the liquid level in the primary heat exchange container is higher than a first preset heat exchange liquid level. The booster pump is used to accelerate the recovery of steam from the separation pressure vessel to the primary heat exchange vessel; The first heat exchange circulation pump is used to exchange heat energy in the primary heat exchange container with the first heat application area; the first heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the primary heat exchange container and the set operating temperature is higher than the actual temperature. For steam with pressure exceeding a set pressure threshold, multi-stage steam transfer is performed between multiple autoclaves, including: The pressures of the autoclaves in the ALC production line that are to be discharged steam are sorted in ascending order to form a discharge steam request stack; the pressures of the autoclaves in the ALC production line that are to be filled with steam are sorted in descending order to form a filling steam request stack; the first predetermined amount of steam from the first autoclave in the discharge steam request stack is poured into the first autoclave in the filling steam request stack. It also includes a secondary heat exchange vessel and a second heat exchange circulation pump; The controller is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the second heat exchange circulation pump to start when a third condition is met; the third condition is that the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set working temperature. The second heat exchange circulation pump is used to exchange heat between the condensate in the secondary heat exchange container and the second heat application area; the second heat application area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the secondary heat exchange container and the set operating temperature is higher than the actual temperature.

2. The energy-saving system for the ALC production line according to claim 1, characterized in that, It also includes a secondary heat exchanger and a sewage pump; The controller is also used to control the condensate generated during the autoclave curing process to flow into the secondary heat exchange container, and to control the sewage pump to start when a fourth condition is met; the fourth condition is that the liquid level in the secondary heat exchange container reaches the sewage discharge level; The sewage pump is used to heat the slurry in the casting area of ​​the ALC production line by utilizing the heat energy of the condensate in the secondary heat exchange container.

3. An energy-saving method for an ALC production line, characterized in that, The energy-saving system for the ALC production line as described in claim 1 or 2 includes: For steam with pressure below a set pressure threshold, heat energy is recovered through a primary heat exchange vessel, including: When the temperature of the steam in the separation pressure vessel is higher than the set temperature, the booster pump is activated to accelerate the recovery of the steam in the separation pressure vessel to the primary heat exchange vessel; the steam in the separation pressure vessel includes steam discharged from the autoclave of the ALC production line with a pressure lower than the set pressure threshold. When the temperature inside the primary heat exchange container is higher than the first preset heat exchange temperature, and the liquid level in the primary heat exchange container is higher than the first preset heat exchange liquid level, the first heat exchange circulation pump is controlled to start, so that the heat energy in the primary heat exchange container can exchange heat with the first heat-using area, thereby raising the temperature of the first heat-using area; the first heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature inside the primary heat exchange container and the set operating temperature is higher than the actual temperature. For steam with pressure exceeding a set pressure threshold, multi-stage steam transfer is performed between multiple autoclaves, including: The pressures of the autoclaves in the ALC production line that are to discharge steam are sorted in ascending order to form a discharge steam request stack; the pressures of the autoclaves in the ALC production line that are to receive steam are sorted in descending order to form a receive steam request stack; the first predetermined amount of steam from the first autoclave in the discharge steam request stack is poured into the first autoclave in the receive steam request stack.

4. The energy-saving method for an ALC production line according to claim 3, characterized in that, Also includes: The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange container; When the liquid level in the secondary heat exchange container is higher than the second preset heat exchange liquid level, the temperature in the secondary heat exchange container is higher than the second preset heat exchange temperature, and the actual temperature of the second heat-using area is lower than the set operating temperature, the second heat exchange circulation pump is controlled to start, so that the condensate in the secondary heat exchange container exchanges heat with the second heat-using area, thereby raising the temperature of the second heat-using area; the second heat-using area includes the area in the ALC production line where the actual temperature is lower than the temperature of the condensate in the secondary heat exchange container and the set operating temperature is higher than the actual temperature.

5. The energy-saving method for an ALC production line according to claim 3, characterized in that, Also includes: The condensate generated during the autoclave curing process is controlled to flow into the secondary heat exchange container; When the liquid level in the secondary heat exchange container reaches the drain level, the drain pump is turned on to use the heat energy of the condensate in the secondary heat exchange container to heat the slurry in the casting area of ​​the ALC production line.

6. The energy-saving method for an ALC production line according to claim 4, characterized in that, The second heat-using area includes the resting area in the ALC production line.

7. The energy-saving method for an ALC production line according to claim 4, characterized in that, The second heat-using area includes the grouping pre-curing area in the ALC production line.

8. The energy-saving method for an ALC production line according to claim 3, characterized in that, The first heat-using area includes the boiler soft water zone.

9. An ALC production line, characterized in that, Including the energy-saving system of the ALC production line as described in claim 1 or 2.

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