Waste gas waste heat recovery method and device, readable storage medium and sleeve kiln

Abstract

The invention discloses a waste gas waste heat recovery method and device, a readable storage medium and a sleeve kiln, and relates to the technical field of industrial waste heat recovery and utilization. The sleeve kiln comprises a cooling fan, a cooling air diffusing port, a gas pipeline and a raw material preheater, one end of the gas pipeline is connected with the cooling air diffusing port, the other end of the gas pipeline is connected with the raw material preheater, and the waste gas waste heat recovery method comprises the steps that under the condition that raw materials are stored in the raw material preheater, heated waste air generated by the cooling fan is collected through the cooling air diffusing port; conveying the heated waste air to a raw material preheater through a gas pipeline so as to heat the raw material preheater; and controlling the raw material preheater to heat the raw material to make the temperature of the raw material greater than or equal to the first temperature threshold. The utilization efficiency of the waste gas in the sleeve kiln is improved, and then the energy consumption of the sleeve kiln is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of industrial waste heat recovery and utilization, and in particular to an exhaust gas waste heat recovery method, device, readable storage medium and sleeve kiln. Background Art

[0002] At present, in the production process of industrial enterprises, waste heat is a resource when used, but it is thermal pollution when discharged. Strengthening the utilization of waste heat from industrial production flue gas is one of the effective means to achieve energy conservation and pollutant emission reduction. However, for industrial equipment such as sleeve kilns, the current waste heat recovery methods for waste gas have technical problems such as low waste gas utilization efficiency and high energy consumption. Summary of the invention

[0003] The embodiments of the present application provide a waste gas waste heat recovery method, device, readable storage medium and sleeve kiln, which are used to solve technical problems in the prior art such as low waste gas utilization efficiency and high energy consumption.

[0004] In a first aspect of an embodiment of the present application, a method for recovering waste heat from exhaust gas is provided, which is applied to a sleeve kiln. The sleeve kiln includes a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater. One end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater. The method includes:

[0005] When the raw material preheater stores the raw material, the heated waste air generated by the cooling fan is collected through the cooling air discharge port;

[0006] The heated waste air is transported to the raw material preheater through a gas pipeline to heat the raw material preheater;

[0007] The raw material preheater is controlled to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold.

[0008] The waste heat recovery method of the exhaust gas in this embodiment collects the heated exhaust air generated by the cooling fan through the cooling air discharge port, uses the heated exhaust air as the heat source of the raw material preheater, and preheats raw materials such as limestone, thereby improving the utilization efficiency of the exhaust gas in the sleeve kiln and reducing the energy consumption of the sleeve kiln.

[0009] In a second aspect of an embodiment of the present application, there is provided an exhaust gas waste heat recovery device, which is applied to a sleeve kiln. The sleeve kiln includes a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater. One end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater. The method includes:

[0010] A control unit, used for collecting the heated waste air generated by the cooling fan through the cooling air discharge port when the raw material preheater stores the raw material;

[0011] The control unit is also used to transport the heated waste air to the raw material preheater through the gas pipeline to heat the raw material preheater;

[0012] The control unit is also used to control the raw material preheater to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold.

[0013] The waste heat recovery device in this embodiment collects the heated waste air generated by the cooling fan through the cooling air discharge port, uses the heated waste air as the heat source of the raw material preheater, and preheats raw materials such as limestone, thereby improving the utilization efficiency of the waste gas in the sleeve kiln and reducing the energy consumption of the sleeve kiln.

[0014] In a third aspect of the embodiments of the present application, another exhaust gas waste heat recovery device is provided, comprising a processor and a memory, wherein a computer program is stored in the memory, and when the computer program is executed by the processor, the steps of the exhaust gas waste heat recovery method in any of the above embodiments are implemented. Therefore, the exhaust gas waste heat recovery device has all the beneficial effects of the exhaust gas waste heat recovery method in any of the above embodiments, which will not be described in detail here.

[0015] In a fourth aspect of the embodiments of the present application, a readable storage medium is provided, on which a program or instruction is stored, and when the program or instruction is executed by a processor, the steps of the exhaust gas waste heat recovery method in any of the above embodiments are implemented. Therefore, the readable storage medium has all the beneficial effects of the exhaust gas waste heat recovery method in any of the above embodiments, which will not be repeated here.

[0016] According to a fifth aspect of the present invention, a sleeve kiln is proposed, comprising: an exhaust gas waste heat recovery device as defined in the above second aspect, or an exhaust gas waste heat recovery device as defined in the above third aspect, and / or a readable storage medium as defined in the above fourth aspect, and thus having all the beneficial technical effects of the exhaust gas waste heat recovery device as defined in the above second aspect, or an exhaust gas waste heat recovery device as defined in the above third aspect, and / or a readable storage medium as defined in the above fourth aspect, and no further details will be given here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 A flow chart of the exhaust gas waste heat recovery method provided in the embodiment of the present application;

[0019] Figure 2A functional module block diagram of an exhaust gas waste heat recovery device provided in an embodiment of the present application;

[0020] Figure 3 A structural block diagram of an exhaust gas waste heat recovery device provided in an embodiment of the present application;

[0021] Figure 4 A schematic diagram of the structure of a sleeve kiln provided in an embodiment of the present application;

[0022] in, Figure 4 The corresponding relationship between the reference numerals and the component names is as follows:

[0023] 1 cooling air vent, 2 bell assembly, 3 raw material preheater, 4 intermediate bin, 5 sealing flap valve, 6 gas pipeline, 7 preheating regulating valve, 8 first detection element, 9 vent regulating valve, 10 second detection element, 11 vent pipeline. DETAILED DESCRIPTION

[0024] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0025] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0026] In some embodiments, Figure 1 The flowchart of the waste heat recovery method provided in the embodiment of the present application is as follows: Figure 1 As shown, a method for recovering waste heat from exhaust gas is proposed, comprising:

[0027] Step S101, when the raw material preheater stores the raw material, the heated waste air generated by the cooling fan is collected through the cooling air discharge port;

[0028] Step S102, transporting the heated waste air to the raw material preheater through a gas pipeline to heat the raw material preheater;

[0029] Step S103: Control the raw material preheater to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold.

[0030] In this embodiment, a method for recovering waste heat from exhaust gas is proposed and applied to a sleeve kiln. The sleeve kiln includes a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater, wherein the sleeve kiln is an industrial equipment for generating lime, the cooling fan is a fan for cooling the sleeve kiln, one end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater, and the raw material preheater is used to preheat the raw materials.

[0031] Illustratively, the sleeve kiln may be a sleeve lime kiln.

[0032] Exemplarily, the cooling fan may be a centrifugal fan.

[0033] Exemplarily, the feedstock preheater may be a limestone preheater.

[0034] When the raw material preheater stores the raw material, the heated waste air generated by the cooling fan is collected through the cooling air discharge port, wherein the heated waste air is the air generated by the cooling fan for cooling the sleeve kiln.

[0035] Exemplarily, the heated exhaust air may be air with a temperature exceeding 100° C. and having a large amount of preheating.

[0036] For example, the raw material may be an ore such as limestone.

[0037] The heated waste air is transported to the raw material preheater through a gas pipeline to heat the raw material preheater.

[0038] Exemplarily, the heated waste air can be used as a heat source for the raw material preheater.

[0039] After the heated waste air is used as a heat source for the raw material preheater, the raw material preheater is controlled to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold, wherein the first temperature threshold is a preset temperature value.

[0040] It should be noted that by recovering the heated waste air generated by the cooling fan and using the heated waste air as the heat source of the raw material preheater, the utilization efficiency of the waste gas in the sleeve kiln is improved. In addition, using the heated waste air as the heat source of the raw material preheater to preheat raw materials such as limestone can save fuel for heating the raw materials in the sleeve kiln and reduce the energy consumption of the sleeve kiln.

[0041] The waste heat recovery method of the exhaust gas in this embodiment collects the heated exhaust air generated by the cooling fan through the cooling air discharge port, uses the heated exhaust air as the heat source of the raw material preheater, and preheats raw materials such as limestone, thereby improving the utilization efficiency of the exhaust gas in the sleeve kiln and reducing the energy consumption of the sleeve kiln.

[0042] In some embodiments, the heated waste air generated by the cooling fan is collected through the cooling air outlet, including:

[0043] Step S201, controlling the cooling fan to transmit cooling air to the inner sleeve, the cooling air is used to reduce the temperature of the inner sleeve;

[0044] Step S202, when the temperature of the cooling air is greater than or equal to the second temperature threshold, the cooling air is collected through the cooling air discharge port to obtain heated waste air.

[0045] In this embodiment, the sleeve kiln further comprises an inner sleeve, wherein the inner sleeve is a component of the sleeve kiln, and during the production process of the sleeve kiln, the temperature of the inner sleeve will continue to rise.

[0046] The cooling fan is started and controlled to transmit cooling air to the inner sleeve, wherein the cooling air is used to reduce the temperature of the inner sleeve.

[0047] Exemplarily, the cooling fan is a centrifugal fan, which forces ventilation into the inner sleeve of the sleeve kiln. After cooling the steel inner sleeve, the temperature of the cooling air will increase.

[0048] When the temperature of the cooling air is greater than or equal to a second temperature threshold, the cooling air is collected through the cooling air discharge port to obtain heated waste air, wherein the second temperature threshold is a preset temperature value.

[0049] It should be noted that when the temperature of the cooling air is greater than or equal to the second temperature threshold, it means that the cooling air has lost its cooling function and has formed heated waste air with a large amount of thermal energy.

[0050] The waste heat recovery method of the exhaust gas in this embodiment collects cooling air through the cooling air discharge port when the temperature of the cooling air is greater than or equal to the second temperature threshold to obtain heated exhaust air, thereby improving the utilization efficiency of the exhaust gas in the sleeve kiln.

[0051] In some embodiments, the release regulating valve is disposed on the gas pipeline, and the exhaust gas waste heat recovery method further includes:

[0052] Step S301, detecting the flow rate of the exhaust gas in the gas pipeline to obtain the gas flow rate of the exhaust gas;

[0053] Step S302, controlling the opening of the release regulating valve to make the gas flow rate within a preset flow rate range.

[0054] In this embodiment, the sleeve kiln further includes a release regulating valve, which is arranged on the gas pipeline and is used to adjust the flow rate of the exhaust gas in the gas pipeline.

[0055] The flow rate of the exhaust gas in the gas pipeline is detected to obtain the gas flow rate of the exhaust gas, wherein the gas flow rate is the flow rate of the exhaust gas.

[0056] Exemplarily, the sleeve kiln includes a detection element, through which the flow rate of the exhaust gas in the gas pipeline is detected to obtain the gas flow rate of the exhaust gas.

[0057] A preset flow range is obtained, wherein the flow range is a preset numerical range for the gas flow.

[0058] Control the opening of the vent regulating valve to discharge a portion of the exhaust gas so that the gas flow is within the preset flow range, avoiding overheating of the raw material preheater and preventing the gas pressure of the raw material preheater from being too high.

[0059] Exemplarily, the quality of the raw material in the raw material preheater is detected, and the flow range is determined based on the quality of the raw material.

[0060] The waste heat recovery method of the exhaust gas in this embodiment discharges a part of the exhaust gas by controlling the opening of the vent regulating valve so that the gas flow rate is within a preset flow rate range, thereby ensuring the stable operation of the raw material preheater and further improving the safety performance of the sleeve kiln.

[0061] In some embodiments, after the heated waste air is transported to the raw material preheater through a gas pipeline to heat the raw material preheater, the waste gas waste heat recovery method further includes:

[0062] Step S401, discharge the heated waste air into the atmosphere through a discharge pipe.

[0063] In this embodiment, the sleeve kiln further comprises a discharge pipe, and the discharge pipe is arranged on the raw material preheater.

[0064] After the raw material preheater heats the raw material preheater, the vent pipe is opened and the heated waste air is discharged into the atmosphere through the vent pipe.

[0065] Exemplarily, when the exhaust gas temperature is lower than the third temperature threshold, the exhaust gas can no longer heat the raw material, and the heated exhaust air is discharged through the vent pipe.

[0066] The waste heat recovery method of the waste gas in this embodiment opens the venting pipe after the raw material preheater heats the raw material preheater, and discharges the heated waste air into the atmosphere through the venting pipe, thereby ensuring the stable operation of the raw material preheater and further improving the stable operation of the sleeve kiln.

[0067] In some embodiments, the exhaust gas waste heat recovery method further includes:

[0068] Step S501, transferring the raw material to the raw material preheater through the intermediate bin;

[0069] Step S502, controlling the sealing flap valve to close so that the raw material preheater forms a sealed container.

[0070] In this embodiment, the sleeve kiln further includes an intermediate bin and a sealing flap valve, and the sealing flap valve is arranged between the raw material preheater and the intermediate bin.

[0071] The raw materials are transferred to the raw material preheater through the intermediate bin, and then the sealing flap valve is controlled to close so that the raw material preheater forms a sealed container.

[0072] Illustratively, after the raw materials are dropped into the raw material preheater through the intermediate bin, the sealed flap valve is automatically closed, so that the raw material preheater forms a relatively sealed space, thereby improving the preheating effect of raw materials such as limestone.

[0073] Exemplarily, the raw material preheater can be a limestone preheater, and the cooling fan of the sleeve kiln is a centrifugal fan, which forces ventilation into the inner sleeve of the sleeve kiln. After cooling the steel inner sleeve, the cooling air temperature increases and passes through the inner sleeve cooling air discharge port, gas pipeline, and limestone preheater on the sleeve kiln in sequence. A part of it is directly discharged into the atmosphere; a part of it preheats the limestone and then enters the interior of the sleeve kiln through the bell assembly under the negative pressure of the sleeve kiln.

[0074] After receiving the signal feedback from the first detection element and the second detection element, the control program automatically adjusts the valve opening of the gas pipeline and the preheating regulating valve, and dynamically adjusts the limestone preheating air volume.

[0075] After the winch feeding system drops the limestone and other raw materials into the limestone preheater through the intermediate bin, the sealed flap valve automatically closes, making the limestone preheater form a relatively sealed space, thereby improving the preheating effect of the limestone and other raw materials.

[0076] The exhaust gas waste heat recovery method in this embodiment transmits the raw material to the raw material preheater, and then controls the sealing flap valve to close so that the raw material preheater forms a sealed container, thereby improving the preheating effect of raw materials such as limestone.

[0077] In some embodiments, Figure 2 As shown, in an embodiment of the present application, a waste gas waste heat recovery device 600 is provided, comprising:

[0078] The control unit 602 is used to collect the heated waste air generated by the cooling fan through the cooling air discharge port when the raw material preheater stores the raw material;

[0079] The control unit 602 is also used to transport the heated waste air to the raw material preheater through the gas pipeline to heat the raw material preheater;

[0080] The control unit 602 is further used to control the raw material preheater to heat the raw material so that the temperature of the raw material is greater than or equal to the first temperature threshold.

[0081] In this embodiment, an exhaust gas waste heat recovery device 600 is proposed and applied to a sleeve kiln. The sleeve kiln includes a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater, wherein the sleeve kiln is an industrial equipment for generating lime, the cooling fan is a fan for cooling the sleeve kiln, one end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater, and the raw material preheater is used to preheat the raw materials.

[0082] Illustratively, the sleeve kiln may be a sleeve-sleeve kiln.

[0083] Exemplarily, the cooling fan may be a centrifugal fan.

[0084] Exemplarily, the feedstock preheater may be a limestone preheater.

[0085] When the raw material preheater stores the raw material, the heated waste air generated by the cooling fan is collected through the cooling air discharge port, wherein the heated waste air is the air generated by the cooling fan after the cooling function.

[0086] Exemplarily, the heated exhaust air may be air with a temperature exceeding one hundred degrees with a large amount of preheating.

[0087] For example, the raw material may be an ore such as limestone.

[0088] The heated waste air is transported to the raw material preheater through a gas pipeline to heat the raw material preheater.

[0089] Exemplarily, the heated waste air can be used as a heat source for the raw material preheater.

[0090] After the heated waste air is used as a heat source for the raw material preheater, the raw material preheater is controlled to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold, wherein the first temperature threshold is a preset temperature value.

[0091] It should be noted that by recovering the heated waste air generated by the cooling fan and using the heated waste air as the heat source of the raw material preheater, the utilization efficiency of the waste gas in the sleeve kiln is improved. In addition, using the heated waste air as the heat source of the raw material preheater to preheat raw materials such as limestone can save fuel for heating the raw materials in the sleeve kiln and reduce the energy consumption of the sleeve kiln.

[0092] The waste gas heat recovery device 600 in this embodiment collects the heated waste air generated by the cooling fan through the cooling air discharge port, uses the heated waste air as the heat source of the raw material preheater, and preheats raw materials such as limestone, thereby improving the utilization efficiency of the waste gas in the sleeve kiln and reducing the energy consumption of the sleeve kiln.

[0093] In some embodiments, an exhaust gas waste heat recovery device 600 is provided in an embodiment of the present application, further comprising:

[0094] The control unit 602 is also used to control the cooling fan to transmit cooling air to the inner sleeve, and the cooling air is used to reduce the temperature of the inner sleeve;

[0095] The control unit 602 is further configured to collect the cooling air through the cooling air discharge port to obtain heated waste air when the temperature of the cooling air is greater than or equal to a second temperature threshold.

[0096] In some embodiments, an exhaust gas waste heat recovery device 600 is provided in an embodiment of the present application, further comprising:

[0097] The control unit 602 is also used to detect the flow rate of the exhaust gas in the gas pipeline to obtain the gas flow rate of the exhaust gas;

[0098] The control unit 602 is also used to control the opening of the release regulating valve so that the gas flow rate is within a preset flow rate range.

[0099] In some embodiments, an exhaust gas waste heat recovery device 600 is provided in an embodiment of the present application, further comprising:

[0100] The control unit 602 is also used to discharge the heated waste air into the atmosphere through a venting duct.

[0101] In some embodiments, an exhaust gas waste heat recovery device 600 is provided in an embodiment of the present application, further comprising:

[0102] The control unit 602 is also used to transfer the raw material to the raw material preheater through the intermediate bin;

[0103] The control unit 602 is also used to control the sealing flap valve to close so that the raw material preheater forms a sealed container.

[0104] In some embodiments, Figure 3 As shown, an exhaust gas waste heat recovery device 700 is proposed, and the exhaust gas waste heat recovery device 700 includes a processor 702 and a memory 704. The memory 704 stores a computer program, and when the computer program is executed by the processor 702, the steps of the exhaust gas waste heat recovery method in any of the above embodiments are implemented. Therefore, the exhaust gas waste heat recovery device 700 has all the beneficial effects of the exhaust gas waste heat recovery method in any of the above embodiments, which will not be repeated here.

[0105] In some embodiments, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, the steps of the exhaust gas waste heat recovery method in any of the above embodiments are implemented, thereby having all the beneficial technical effects of the exhaust gas waste heat recovery method in any of the above embodiments.

[0106] In some embodiments, a sleeve kiln is provided, including: an exhaust gas waste heat recovery device as in any of the above embodiments, and / or a readable storage medium as in any of the above embodiments, and thus has all the beneficial technical effects of the exhaust gas waste heat recovery device as in any of the above embodiments, and / or the readable storage medium as in any of the above embodiments, and no further details will be given here.

[0107] In some embodiments, a sleeve kiln is provided, the sleeve kiln further comprising:

[0108] Cooling air vent, gas pipeline, raw material preheater, vent pipeline, intermediate bin and sealed flap valve;

[0109] One end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater;

[0110] The venting pipe is arranged on the raw material preheater;

[0111] The sealed flap valve is arranged between the raw material preheater and the intermediate bin.

[0112] For example, Figure 4 As shown, the hoisting feeding system transports the limestone raw materials to the intermediate bin 4, and the cooling air discharge port 1 of the sleeve kiln is connected to the exhaust cooling air duct in the kiln.

[0113] The inlet of the gas pipeline 6 is connected to the cooling air outlet 1 of the inner sleeve of the sleeve kiln, and the outlet is connected to the raw material preheater 3. The preheating regulating valve 7 and the first detection element 8 are installed on the gas pipeline 6, and the first detection element 8 has the functions of pressure, flow and temperature detection.

[0114] The inlet of the venting pipe 11 is installed on the gas pipe 6, specifically, it is installed in the gas direction of the preheating regulating valve 7. The venting regulating valve 9 and the second detection element 10 are installed on the venting pipe 11, and the second detection element 10 has the pressure, flow and temperature detection functions. The outlet of the venting pipe 11 is directly discharged to the atmosphere.

[0115] The raw material preheater 3 is the core equipment for lime preheating. It is connected with the intermediate bin 4 and the bell assembly 2, and a venting pipe 11 is installed on the top.

[0116] A sealing flap valve 5 is installed below the intermediate bin 4 to seal between the raw material preheater 3 and the intermediate bin 4, so that the limestone preheater forms a relatively sealed ring to isolate the external low-temperature air.

[0117] The bell assembly 2 and the intermediate bin 4 are similar in structure to the functional equipment of a conventional sleeve kiln and are adapted to the installation form of the raw material preheater 3 .

[0118] The signal detected by the detection element is fed back to the control program and the operation screen of the main control room.

[0119] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0124] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes a process of an exhaust gas waste heat recovery method.

[0125] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0126] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0127] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0128] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0129] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0130] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0131] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0132] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of this specification.

[0133] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for recovering waste heat from exhaust gas, characterized in that: Applied to a sleeve kiln, the sleeve kiln comprises a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater, one end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater, the method comprises: When the raw material preheater stores raw materials, the heated waste air generated by the cooling fan is collected through the cooling air discharge port; The heated waste air is conveyed to the raw material preheater through the gas pipeline to heat the raw material preheater; The raw material preheater is controlled to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold.

2. The method according to claim 1, characterized in that The sleeve kiln also includes an inner sleeve, and the waste air after heating generated by the cooling fan is collected through the cooling air discharge port, including: Controlling the cooling fan to transmit cooling air to the inner sleeve, wherein the cooling air is used to reduce the temperature of the inner sleeve; When the temperature of the cooling air is greater than or equal to a second temperature threshold, the cooling air is collected through the cooling air discharge port to obtain the heated waste air.

3. The method according to claim 1, characterized in that The sleeve kiln further includes a release regulating valve, which is arranged on the gas pipeline. The method further includes: detecting the flow rate of the exhaust gas in the gas pipeline to obtain the gas flow rate of the exhaust gas; The opening of the release regulating valve is controlled so that the gas flow rate is within a preset flow rate range.

4. The method according to any one of claims 1 or 3, characterized in that The sleeve kiln further includes a dispersing pipe, which is arranged on the raw material preheater. After the heated waste air is transported to the raw material preheater through the gas pipe to heat the raw material preheater, the method further includes: The heated waste air is discharged into the atmosphere through the venting pipe.

5. The method according to any one of claims 1 or 3, characterized in that The sleeve kiln further includes an intermediate bin and a sealed flap valve, wherein the sealed flap valve is disposed between the raw material preheater and the intermediate bin. The method further includes: The raw material is transferred to a raw material preheater through the intermediate bin; The sealing flap valve is controlled to be closed so that the raw material preheater forms a sealed container.

6. An exhaust gas waste heat recovery device, characterized in that: Applied to a sleeve kiln, the sleeve kiln comprises a cooling fan, a cooling air discharge port, a gas pipeline and a raw material preheater, one end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater, the method comprises: A control unit, configured to collect the heated waste air generated by the cooling fan through the cooling air discharge port when the raw material preheater stores the raw material; The control unit is further used to transport the heated waste air to the raw material preheater through the gas pipeline to heat the raw material preheater; The control unit is further used to control the raw material preheater to heat the raw material so that the temperature of the raw material is greater than or equal to a first temperature threshold.

7. An exhaust gas waste heat recovery device, characterized in that: include: processor; A memory, wherein a program or instruction is stored in the memory, and when the processor executes the program or instruction in the memory, the steps of the exhaust gas waste heat recovery method as claimed in any one of claims 1 to 5 are implemented.

8. A readable storage medium, characterized in that: The readable storage medium stores programs or instructions, and when the programs or instructions are executed by the processor, the steps of the exhaust gas waste heat recovery method as described in any one of claims 1 to 5 are implemented.

9. A sleeve kiln, characterized in that: include: The exhaust gas waste heat recovery device as claimed in claim 6 or 7; and / or The readable storage medium as claimed in claim 8.

10. The sleeve kiln according to claim 9, characterized in that: The sleeve kiln also includes: Cooling air vent, gas pipeline, raw material preheater, vent pipeline, intermediate bin and sealed flap valve; One end of the gas pipeline is connected to the cooling air discharge port, and the other end is connected to the raw material preheater; The venting pipe is arranged on the raw material preheater; The sealing flap valve is arranged between the raw material preheater and the intermediate bin.

Images