Industrial manufacturing waste heat utilization energy-saving device and energy-saving method

Abstract

The invention relates to the technical field of waste heat recovery, in particular to an industrial manufacturing waste heat utilization energy-saving device and an energy-saving method.The industrial manufacturing waste heat utilization energy-saving device comprises a waste heat collection module, an energy conversion module and a regulation and control module, and the waste heat collection module comprises a flue gas collection unit, a filtering unit, a heat absorption unit and a cleaning unit; the flue gas collecting unit is used for collecting high-temperature flue gas discharged in industrial production to obtain high-temperature flue gas; the filtering unit filters out dust of the high-temperature flue gas to obtain filtered flue gas, and the heat absorption unit absorbs heat of the filtered flue gas based on the heat transfer principle to obtain heat energy; the cleaning unit is used for regularly cleaning dust accumulated on the heat absorption unit; the energy conversion module converts the heat absorbed by the heat absorption unit into energy which can be directly utilized based on a heat exchange technology; the regulation and control module monitors temperature and pressure parameters in the waste heat collection, transmission and conversion process in real time and transmits data to the central control system to regulate and control the whole waste heat recovery process.

Description

Technical Field

[0001] This invention relates to the field of waste heat recovery technology, and in particular to an energy-saving device and method for utilizing waste heat in industrial manufacturing. Background Technology

[0002] In the industrial manufacturing sector, various production processes (such as metallurgy, chemical engineering, power generation, machining, and building materials) involve significant energy consumption. A large portion of this energy is not effectively utilized but is instead directly emitted into the environment as waste heat through waste gas, wastewater, waste residue, or heat dissipation from equipment surfaces. Statistics show that industrial waste heat accounts for 30% to 50% of total industrial energy consumption. The direct emission of this waste heat not only causes serious energy waste but also exacerbates environmental thermal pollution, contradicting the current global goals of "energy conservation and emission reduction" and "carbon neutrality."

[0003] In traditional industrial production, waste heat is often considered "waste heat" and lacks systematic recovery and utilization devices, resulting in the loss of a large amount of usable energy. For example, blast furnace gas in steel plants and kiln tail gas in cement plants can reach temperatures of several hundred degrees Celsius. Direct emission of such waste heat is equivalent to the loss of several tons of standard coal's energy per hour. Furthermore, the direct emission of high-temperature waste heat (such as flue gas and steam) will raise the surrounding ambient temperature, creating a "heat island effect." At the same time, the emission of some waste heat carriers (such as dust-laden waste gas) without treatment will also cause air or water pollution, increasing environmental governance costs. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-saving device and method for utilizing waste heat in industrial manufacturing, aiming to solve the problem of direct emission of high-temperature flue gas in traditional industrial production without waste heat recovery, resulting in energy waste.

[0005] To achieve the above objectives, in a first aspect, the present invention provides an energy-saving device for utilizing waste heat in industrial manufacturing, comprising a waste heat collection module, an energy conversion module, and a control module. The control module is connected to the waste heat collection module and the energy conversion module respectively. The waste heat collection module includes a flue gas collection unit, a filtration unit, a heat absorption unit, and a cleaning unit, which are connected in sequence.

[0006] The flue gas collection unit is used to collect high-temperature flue gas emitted from industrial production to obtain high-temperature flue gas;

[0007] The filtration unit is used to filter out the dust from the high-temperature flue gas to obtain filtered flue gas.

[0008] The heat absorption unit absorbs heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy.

[0009] The cleaning unit is used to periodically clean the dust accumulated on the heat absorption unit;

[0010] The energy conversion module converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology.

[0011] The control module is used to monitor the temperature and pressure parameters in real time during the waste heat collection, transmission and conversion process, and transmit the data to the central control system to control the entire waste heat recovery process.

[0012] The cleaning unit includes a pressurizing subunit and a flushing subunit, which are connected to each other.

[0013] The pressurizing subunit is used to pressurize the clean water introduced into the flushing subunit to obtain a high-pressure water flow.

[0014] The flushing subunit is used to spray high-pressure water to flush the flue gas collection unit and remove dust from it.

[0015] The energy conversion module includes a heat transfer unit and an energy conversion unit, and the heat transfer unit and the energy conversion unit are connected.

[0016] The heat transfer unit transfers absorbed heat based on the heat transfer medium;

[0017] The energy conversion unit converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology.

[0018] The heat transfer unit includes a pipe subunit, a power subunit, and a flow subunit, wherein the power subunit and the flow subunit are respectively connected to the pipe subunit;

[0019] The pipeline subunit is used to transport the heat transfer medium between the flue gas collection unit and the energy conversion unit.

[0020] The power subunit is used to provide a power source for the heat transfer medium;

[0021] The flow subunit is used to monitor the flow rate of the heat transfer medium in the pipeline subunit in real time and transmit the detected value to the control module.

[0022] The control module includes a control unit, an execution unit, and a safety unit, wherein the control unit is connected to the execution unit and the safety unit respectively.

[0023] The control unit is used to control the operation of the waste heat collection module and the energy conversion module;

[0024] The safety unit monitors the data of the waste heat collection module and the energy conversion module in real time based on sensor technology, and compares and analyzes the data with preset data to obtain safety alarm information;

[0025] The execution unit performs waste heat recovery or emergency shutdown actions based on the safety alarm information.

[0026] The execution unit includes an execution subunit, an alarm subunit, and an emergency stop subunit;

[0027] The execution subunit is used to execute the actions of the waste heat collection module and the energy conversion module to realize waste heat recovery;

[0028] The alarm subunit sends alarm information to the administrator based on the security alarm information;

[0029] The emergency stop subunit, based on the safety alarm information, urgently stops the operation of the waste heat collection module and the energy conversion module.

[0030] In a second aspect, the present invention also provides an energy-saving method for utilizing waste heat in industrial manufacturing, applied to the energy-saving device for utilizing waste heat in industrial manufacturing as described in the first aspect above, comprising the following steps;

[0031] The flue gas collection unit collects high-temperature flue gas emitted from industrial production, and the heat absorption unit absorbs the heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy.

[0032] The energy conversion module transfers heat and converts thermal energy into directly usable energy based on heat exchange technology;

[0033] The control module monitors the temperature and pressure parameters in real time during the waste heat collection, transmission and conversion process, and transmits the data to the central control system to regulate the entire waste heat recovery process.

[0034] This invention discloses an energy-saving device for utilizing waste heat in industrial manufacturing. The device comprises a flue gas collection unit for collecting high-temperature flue gas emitted from industrial production, resulting in high-temperature flue gas; a filtration unit for filtering out dust from the high-temperature flue gas, resulting in filtered flue gas; a heat absorption unit for absorbing heat from the filtered flue gas based on the principle of heat transfer, resulting in thermal energy; a cleaning unit for periodically cleaning the dust accumulated on the heat absorption unit; an energy conversion module for converting the heat absorbed by the heat absorption unit into directly usable energy based on heat exchange technology; and a control module for real-time monitoring of temperature and pressure parameters during the waste heat collection, transmission, and conversion processes, transmitting the data to a central control system to regulate the entire waste heat recovery process. This device can absorb heat from emitted waste gas and convert it into other forms of energy, achieving a win-win situation of energy conservation, emission reduction, and economic benefits. This solves the problem of direct emission of high-temperature flue gas from traditional industrial production without waste heat recovery, resulting in energy waste. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present 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 only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a connection diagram of an energy-saving device for utilizing waste heat in industrial manufacturing, provided by the present invention.

[0037] Figure 2 This is a schematic diagram of the cleaning unit of an energy-saving device for utilizing waste heat in industrial manufacturing, provided by the present invention.

[0038] Figure 3 This is a schematic diagram of the energy conversion module of an energy-saving device for utilizing waste heat in industrial manufacturing, provided by the present invention.

[0039] Figure 4 This is a schematic diagram of the control module of an energy-saving device for utilizing waste heat in industrial manufacturing, provided by the present invention.

[0040] Figure 5 This is a flowchart of an energy-saving method for utilizing waste heat in industrial manufacturing, provided by the present invention.

[0041] In the diagram: 1-Waste heat collection module, 2-Energy conversion module, 3-Control module, 11-Flue gas collection unit, 12-Filtration unit, 13-Heat absorption unit, 14-Cleaning unit, 141-Pressure subunit, 142-Flushing subunit, 21-Heat transfer unit, 22-Energy conversion unit, 211-Pipeline subunit, 212-Power subunit, 213-Flow subunit, 31-Control unit, 32-Actuation unit, 33-Safety unit, 321-Actuation subunit, 322-Alarm subunit, 333-Emergency stop subunit. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0043] Please see Figures 1 to 5In a first aspect, the present invention provides an energy-saving device for utilizing waste heat in industrial manufacturing, comprising a waste heat collection module, an energy conversion module, and a control module. The control module is connected to the waste heat collection module and the energy conversion module respectively. The waste heat collection module includes a flue gas collection unit, a filtration unit, a heat absorption unit, and a cleaning unit, which are connected in sequence.

[0044] The flue gas collection unit is used to collect high-temperature flue gas emitted from industrial production to obtain high-temperature flue gas;

[0045] The filtration unit is used to filter out the dust from the high-temperature flue gas to obtain filtered flue gas.

[0046] The heat absorption unit absorbs heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy.

[0047] The cleaning unit is used to periodically clean the dust accumulated on the heat absorption unit;

[0048] The energy conversion module converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology.

[0049] The control module is used to monitor the temperature and pressure parameters in real time during the waste heat collection, transmission and conversion process, and transmit the data to the central control system to control the entire waste heat recovery process.

[0050] In this embodiment of the invention, the flue gas collection unit is used to collect high-temperature flue gas emitted from industrial production, resulting in high-temperature flue gas; the filtration unit is used to filter out dust from the high-temperature flue gas, resulting in filtered flue gas; the heat absorption unit absorbs heat from the filtered flue gas based on the principle of heat transfer, obtaining thermal energy; the cleaning unit periodically cleans the dust accumulated on the heat absorption unit; the energy conversion module converts the heat absorbed by the heat absorption unit into directly usable energy based on heat exchange technology; the control module monitors the temperature and pressure parameters in real time during the waste heat collection, transmission, and conversion process, and transmits the data to the central control system to control the entire waste heat recovery process. This device can absorb heat from the emitted exhaust gas and convert the heat into other forms of energy, achieving a win-win situation of energy conservation, emission reduction, and economic benefits, thereby solving the problem of direct emission of high-temperature flue gas from traditional industrial production without waste heat recovery, resulting in energy waste.

[0051] Furthermore, the cleaning unit includes a pressurization subunit and a flushing subunit, which are connected together.

[0052] The pressurizing subunit is used to pressurize the clean water introduced into the flushing subunit to obtain a high-pressure water flow.

[0053] The flushing subunit is used to spray high-pressure water to flush the flue gas collection unit and remove dust from it.

[0054] In this embodiment of the invention, although the filtered flue gas is filtered for dust by the filtering unit, a small amount of finer dust will still inevitably remain in the flue gas. This dust will stick to the surface of the heat absorption unit, thereby affecting the absorption effect of the heat absorption unit. Therefore, the cleaning water in the flushing subunit is pressurized by the pressurizing subunit to obtain a high-pressure water flow. The flushing subunit then sprays the high-pressure water flow out to flush the flue gas collection unit, remove the dust on it, and ensure the heat absorption efficiency of the heat absorption unit.

[0055] Furthermore, the energy conversion module includes a heat transfer unit and an energy conversion unit, which are connected together; the heat transfer unit includes a pipe subunit, a power subunit, and a flow subunit, which are respectively connected to the pipe subunit.

[0056] The heat transfer unit transfers absorbed heat based on the heat transfer medium;

[0057] The energy conversion unit converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology.

[0058] The pipeline subunit is used to transport the heat transfer medium between the flue gas collection unit and the energy conversion unit.

[0059] The power subunit is used to provide a power source for the heat transfer medium;

[0060] The flow subunit is used to monitor the flow rate of the heat transfer medium in the pipeline subunit in real time and transmit the detected value to the control module.

[0061] In this embodiment of the invention, the pipe subunit of the heat transfer unit is used to transport the heat transfer medium between the flue gas collection unit and the energy conversion unit. The flow subunit monitors the flow rate of the heat transfer medium in the pipe subunit in real time and transmits the detected value to the control module to adjust the flow rate of the heat transfer medium. The power subunit is used to provide a power source for the heat transfer medium so that the heat transfer medium can flow in the pipe subunit. The energy conversion unit converts the heat absorbed by the heat absorption unit into directly usable energy based on heat exchange technology.

[0062] Furthermore, the control module includes a control unit, an execution unit, and a safety unit, with the control unit connected to both the execution unit and the safety unit; the execution unit includes an execution subunit, an alarm subunit, and an emergency stop subunit.

[0063] The control unit is used to control the operation of the waste heat collection module and the energy conversion module;

[0064] The safety unit monitors the data of the waste heat collection module and the energy conversion module in real time based on sensor technology, and compares and analyzes the data with preset data to obtain safety alarm information;

[0065] The execution unit performs waste heat recovery or emergency stop actions based on the safety alarm information;

[0066] The execution subunit is used to execute the actions of the waste heat collection module and the energy conversion module to realize waste heat recovery;

[0067] The alarm subunit sends alarm information to the administrator based on the security alarm information;

[0068] The emergency stop subunit, based on the safety alarm information, urgently stops the operation of the waste heat collection module and the energy conversion module.

[0069] In this embodiment of the invention, the control unit is used to control the operation of the waste heat collection module and the energy conversion module; the safety unit monitors the data of the waste heat collection module and the energy conversion module in real time based on sensor technology, and compares and analyzes it with preset data to obtain safety alarm information; when the safety alarm information is normal, the execution subunit executes the operation of the waste heat collection module and the energy conversion module to realize waste heat recovery; when the safety alarm information is abnormal (such as high flow rate, pressure, etc.), the alarm subunit sends alarm information to the manager; at the same time, the emergency stop subunit immediately stops the operation of the waste heat collection module and the energy conversion module.

[0070] In a second aspect, the present invention also provides an energy-saving method for utilizing waste heat in industrial manufacturing, applied to the energy-saving device for utilizing waste heat in industrial manufacturing as described in the first aspect above, comprising the following steps;

[0071] The S1 flue gas collection unit collects high-temperature flue gas emitted from industrial production, and the heat absorption unit absorbs the heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy.

[0072] In this embodiment of the invention, the flue gas collection unit collects high-temperature flue gas emitted from industrial production to obtain high-temperature flue gas; the filtration unit filters out dust from the high-temperature flue gas to obtain filtered flue gas; and the heat absorption unit absorbs heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy.

[0073] The S2 energy conversion module transfers heat and converts thermal energy into directly usable energy based on heat exchange technology.

[0074] In this embodiment of the invention, the pipe subunit of the heat transfer unit is used to transport the heat transfer medium between the flue gas collection unit and the energy conversion unit. The flow subunit monitors the flow rate of the heat transfer medium in the pipe subunit in real time and transmits the detected value to the control module to adjust the flow rate of the heat transfer medium. The power subunit is used to provide a power source for the heat transfer medium so that the heat transfer medium can flow in the pipe subunit. The energy conversion unit converts the heat absorbed by the heat absorption unit into directly usable energy based on heat exchange technology.

[0075] The S3 control module monitors the temperature and pressure parameters in real time during the waste heat collection, transmission, and conversion process, and transmits the data to the central control system to regulate the entire waste heat recovery process.

[0076] In this embodiment of the invention, the control unit is used to control the operation of the waste heat collection module and the energy conversion module; the safety unit monitors the data of the waste heat collection module and the energy conversion module in real time based on sensor technology, and compares and analyzes it with preset data to obtain safety alarm information; when the safety alarm information is normal, the execution subunit executes the operation of the waste heat collection module and the energy conversion module to realize waste heat recovery; when the safety alarm information is abnormal (such as high flow rate, pressure, etc.), the alarm subunit sends alarm information to the manager; at the same time, the emergency stop subunit immediately stops the operation of the waste heat collection module and the energy conversion module.

[0077] The above description is merely a preferred embodiment of an energy-saving device and method for utilizing waste heat in industrial manufacturing according to the present invention. It should not be construed as limiting the scope of the present invention. Those skilled in the art can understand that implementing all or part of the above embodiments and making equivalent changes in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. An energy-saving device for utilizing waste heat in industrial manufacturing, characterized in that... ； It includes a waste heat collection module, an energy conversion module, and a control module. The control module is connected to the waste heat collection module and the energy conversion module respectively. The waste heat collection module includes a flue gas collection unit, a filtration unit, a heat absorption unit, and a cleaning unit. The flue gas collection unit, the heat absorption unit, and the cleaning unit are connected in sequence. The flue gas collection unit is used to collect high-temperature flue gas emitted from industrial production to obtain high-temperature flue gas; The filtration unit is used to filter out the dust from the high-temperature flue gas to obtain filtered flue gas. The heat absorption unit absorbs heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy. The cleaning unit is used to periodically clean the dust accumulated on the heat absorption unit; The energy conversion module converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology. The control module is used to monitor the temperature and pressure parameters in real time during the waste heat collection, transmission and conversion process, and transmit the data to the central control system to control the entire waste heat recovery process.

2. The energy-saving device for industrial manufacturing waste heat utilization as described in claim 1, characterized in that... ； The cleaning unit includes a pressurization subunit and a flushing subunit, which are connected together. The pressurizing subunit is used to pressurize the clean water introduced into the flushing subunit to obtain a high-pressure water flow. The flushing subunit is used to spray high-pressure water to flush the flue gas collection unit and remove dust from it.

3. The energy-saving device for industrial manufacturing waste heat utilization as described in claim 1, characterized in that... ； The energy conversion module includes a heat transfer unit and an energy conversion unit, and the heat transfer unit and the energy conversion unit are connected. The heat transfer unit transfers absorbed heat based on the heat transfer medium; The energy conversion unit converts the heat absorbed by the heat-absorbing unit into directly usable energy based on heat exchange technology.

4. The industrial manufacturing waste heat utilization energy-saving device as described in claim 3, characterized in that... ； The heat transfer unit includes a pipe subunit, a power subunit, and a flow subunit, wherein the power subunit and the flow subunit are respectively connected to the pipe subunit; The pipeline subunit is used to transport the heat transfer medium between the flue gas collection unit and the energy conversion unit. The power subunit is used to provide a power source for the heat transfer medium; The flow subunit is used to monitor the flow rate of the heat transfer medium in the pipeline subunit in real time and transmit the detected value to the control module.

5. The energy-saving device for utilizing waste heat in industrial manufacturing as described in claim 1, Its characteristics are: The control module includes a control unit, an execution unit, and a safety unit, wherein the control unit is connected to the execution unit and the safety unit respectively; The control unit is used to control the operation of the waste heat collection module and the energy conversion module; The safety unit monitors the data of the waste heat collection module and the energy conversion module in real time based on sensor technology, and compares and analyzes the data with preset data to obtain safety alarm information; The execution unit performs waste heat recovery or emergency shutdown actions based on the safety alarm information.

6. The energy-saving device for utilizing waste heat in industrial manufacturing as described in claim 1, Its characteristics are: The execution unit includes an execution subunit, an alarm subunit, and an emergency stop subunit; The execution subunit is used to execute the actions of the waste heat collection module and the energy conversion module to realize waste heat recovery; The alarm subunit sends alarm information to the administrator based on the security alarm information; The emergency stop subunit, based on the safety alarm information, urgently stops the operation of the waste heat collection module and the energy conversion module.

7. An energy-saving method for utilizing waste heat in industrial manufacturing, applied to the energy-saving device for utilizing waste heat in industrial manufacturing as described in any one of claims 1-6, characterized in that, Includes the following steps; The flue gas collection unit collects high-temperature flue gas emitted from industrial production, and the heat absorption unit absorbs the heat from the filtered flue gas based on the principle of heat transfer to obtain thermal energy. The energy conversion module transfers heat and converts thermal energy into directly usable energy based on heat exchange technology; The control module monitors the temperature and pressure parameters in real time during the waste heat collection, transmission and conversion process, and transmits the data to the central control system to regulate the entire waste heat recovery process.

Images