Molecular sieve rotating wheel system matched with waste heat recovery

Abstract

The utility model relates to a molecular sieve rotating wheel system matched with waste heat recovery. The molecular sieve runner system comprises a molecular sieve runner, a gas treatment device, a desorption heater and a heat pump unit, a second heat absorption side inlet of the second heat exchanger is communicated with a cooling area outlet, a flue gas inlet of the desorption heater is communicated with a second heat absorption side outlet, and the heat pump unit comprises a first heat exchanger, a second heat exchanger, a compressor and temperature and pressure reduction equipment. The smoke outlet, the desorption area, the gas treatment device and the heat release side of the first heat exchanger are sequentially communicated, and the heat absorption side of the first heat exchanger, the compressor, the heat release side of the second heat exchanger and the temperature and pressure reduction equipment are sequentially communicated to form a working medium circulation loop. According to the molecular sieve runner system, waste heat can be recycled for self-preheating, operation cost and environmental thermal pollution are reduced, the main process of adsorption / desorption of the molecular sieve runner is not affected, upstream and downstream processes are not affected, meanwhile, a working medium circulation path can be started or stopped at any time, and flexibility and universality are high.

Description

Technical Field

[0001] The utility model relates to the technical field of molecular sieve rotor flue gas treatment, in particular to a molecular sieve rotor system with supporting waste heat recovery. Background Art

[0002] As a highly efficient waste gas concentration equipment, the molecular sieve rotor is widely used in the treatment of organic waste gas, recovery and purification of volatile organic compounds. In traditional molecular sieve rotors, after the molecular sieve is saturated with adsorption, it needs to enter the desorption zone for heating and regeneration treatment to restore its adsorption capacity. In related technologies, there are still many problems that need to be solved in the molecular sieve rotor flue gas treatment system: the desorption heater heating has problems such as high energy consumption and high operating costs. The desorption heater generally uses electric heating or fuel heating, which is not conducive to carbon emission reduction and sustainable development; the high-concentration and high-temperature gas coming out of the molecular sieve rotor desorption zone usually increases in temperature further during the post-processing process, and there is a lack of attention to the waste heat recovery or the waste heat recovery rate is limited; many molecular sieve rotor systems equipped with waste heat recovery equipment are closely integrated with other equipment or upstream and downstream processes, which easily leads to complex systems and poor flexibility of the molecular sieve rotor system, resulting in limited application, which is not conducive to dealing with emergencies in the production process and poor versatility. Utility Model Content

[0003] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a molecular sieve rotor system with supporting waste heat recovery, which can recycle the waste heat generated by the system and preheat the hot air flow for desorption, thereby reducing the energy consumption of the desorption heater, reducing the operating cost of the system and environmental thermal pollution. At the same time, the working fluid circulation path can be activated or disabled at any time, with high flexibility and versatility.

[0005] According to the embodiment of the utility model, the molecular sieve rotor system for waste heat recovery includes a molecular sieve rotor, a gas treatment device, a desorption heater and a heat pump unit. The molecular sieve rotor has an adsorption zone, a desorption zone and a cooling zone. The inlet of the adsorption zone and the inlet of the cooling zone are connected in parallel and are used to connect to the flue gas source; the inlet of the gas treatment device is connected to the outlet of the desorption zone; the desorption heater has a flue gas inlet and a flue gas outlet, and the flue gas outlet is connected to the inlet of the desorption zone; the heat pump unit includes a first heat exchanger, a second heat exchanger, a compressor and a temperature and pressure reduction device. The first heat exchanger has a first heat exchanger, a second heat exchanger, a compressor and a temperature and pressure reduction device. There is a first heat absorption side inlet, a first heat absorption side outlet, a first heat release side inlet and a first heat release side outlet. The first heat release side inlet is connected to the outlet of the gas processing device. The second heat exchanger has a second heat absorption side inlet, a second heat absorption side outlet, a second heat release side inlet and a second heat release side outlet. The second heat absorption side inlet is connected to the outlet of the cooling zone, and the second heat absorption side outlet is connected to the flue gas inlet. The first heat absorption side outlet, the compressor, the second heat release side inlet, the second heat release side outlet, the temperature and pressure reduction device and the first heat absorption side inlet are connected in sequence to form a working medium circulation loop.

[0006] The molecular sieve rotor system with waste heat recovery in the present embodiment of the utility model can recycle the waste heat generated by the system through a heat pump unit to preheat the hot air flow used for desorption, thereby reducing the energy consumption of the desorption heater, the operating costs of the system, and the environmental thermal pollution. Furthermore, the molecular sieve rotor system with waste heat recovery in the present embodiment of the utility model reuses the waste heat for self-heating, without affecting the main adsorption / desorption process of the molecular sieve rotor or upstream and downstream processes. At the same time, the working fluid circulation path can be activated or deactivated at any time, providing high flexibility and versatility.

[0007] In some embodiments, the molecular sieve rotor system with supporting waste heat recovery further includes a third heat exchanger, the third heat exchanger having a third heat absorption side inlet, a third heat absorption side outlet, a third heat release side inlet and a third heat release side outlet, the third heat release side inlet is connected to the outlet of the gas treatment device, the third heat release side outlet is connected to the first heat release side inlet, the third heat absorption side inlet is connected to the outlet of the cooling zone, the third heat absorption side outlet is connected to the second heat absorption side inlet, or the third heat absorption side inlet is connected to the second heat absorption side outlet, and the third heat absorption side outlet is connected to the flue gas inlet.

[0008] In some embodiments, the temperature and pressure reduction device is a throttle valve.

[0009] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes a three-way valve, the inlet of the three-way valve is used to connect to the flue gas source, and the two outlets of the three-way valve are respectively connected to the inlet of the adsorption zone and the inlet of the cooling zone.

[0010] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes a filter, the inlet of the filter is used to connect to the flue gas source, and the outlet of the filter is connected to the inlet of the three-way valve.

[0011] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes a fourth heat exchanger, the fourth heat exchanger having a fourth exothermic side inlet and a fourth exothermic side outlet, the fourth exothermic side inlet is connected to the outlet of the filter, and the fourth exothermic side outlet is connected to the inlet of the three-way valve.

[0012] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes an adsorption fan, the inlet of the adsorption fan is connected to the fourth heat release side outlet, and the outlet of the adsorption fan is connected to the inlet of the three-way valve.

[0013] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes a desorption fan, the inlet of the desorption fan is connected to the outlet of the desorption zone, and the outlet of the desorption fan is connected to the inlet of the gas treatment device.

[0014] In some embodiments, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, and the gas processing device is a thermal storage gas processing device or a gas processing device with a heat recovery component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Schematic diagram of a molecular sieve rotor system according to an embodiment of the present invention;

[0016] Figure 2 This is a schematic diagram of an example of a molecular sieve rotor system of the present invention;

[0017] Reference numerals:

[0018] Molecular sieve rotor system 100;

[0019] Molecular sieve rotor 1, adsorption zone 101, desorption zone 102, cooling zone 103;

[0020] Gas processing device 2;

[0021] A first heat exchanger 3, a first heat absorbing side inlet 301, a first heat absorbing side outlet 302, a first heat releasing side inlet 303, and a first heat releasing side outlet 304;

[0022] The second heat exchanger 4 has a second heat absorbing side inlet 401, a second heat absorbing side outlet 402, a second heat releasing side inlet 403, and a second heat releasing side outlet 404;

[0023] Desorption heater 5, flue gas inlet 51, flue gas outlet 52;

[0024] Compressor 6, temperature and pressure reduction equipment 7;

[0025] The third heat exchanger 8 has a third heat absorbing side inlet 801, a third heat absorbing side outlet 802, a third heat releasing side inlet 803, and a third heat releasing side outlet 804;

[0026] Three-way valve 9, filter 10;

[0027] The fourth heat exchanger 11 has a fourth heat release side inlet 1101 and a fourth heat release side outlet 1102;

[0028] Adsorption fan 12, desorption fan 13. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0030] Please refer to the attached Figure 1 and Figure 2 The molecular sieve rotor system 100 for waste heat recovery and its application method according to an embodiment of the present invention are described in detail.

[0031] The molecular sieve rotor system 100 for waste heat recovery according to the embodiment of the present invention includes a molecular sieve rotor 1, a gas processing device 2, a desorption heater 5 and a heat pump unit.

[0032] The molecular sieve rotor 1 comprises an adsorption zone 101, a desorption zone 102, and a cooling zone 103. The inlet of the adsorption zone 101 and the inlet of the cooling zone 103 are connected in parallel and are used to connect to a flue gas source. The inlet of the gas treatment device 2 is connected to the outlet of the desorption zone 102. The desorption heater 5 has a flue gas inlet 51 and a flue gas outlet 52, which is connected to the inlet of the desorption zone 102. The heat pump unit includes a first heat exchanger 3, a second heat exchanger 4, a compressor 6 and a temperature reduction and pressure reduction device 7. The first heat exchanger 3 has a first heat absorption side inlet 301, a first heat absorption side outlet 302, a first heat release side inlet 303 and a first heat release side outlet 304. The first heat release side inlet 303 is connected to the outlet of the gas treatment device 2. The second heat exchanger 4 has a second heat absorption side inlet 401, a second heat absorption side outlet 402, a second heat release side inlet 403 and a second heat release side outlet 404. The second heat absorption side inlet 401 is connected to the outlet of the cooling zone 103, and the second heat absorption side outlet 402 is connected to the flue gas inlet 51. The first heat absorption side outlet 302, the compressor 6, the second heat release side inlet 403, the second heat release side outlet 404, the temperature reduction and pressure reduction device 7 and the first heat absorption side inlet 301 are connected in sequence to form a working medium circulation loop.

[0033] The application method of the molecular sieve rotor system 100 with waste heat recovery of the embodiment of the present invention includes the following steps: the working medium is introduced into the working medium circulation loop, the working medium enters the first heat exchanger 3 to absorb heat, and recovers the thermal energy of the flue gas of the gas treatment device 2; then enters the compressor 6, and is pressurized and heated by the compressor 6, so that the working medium becomes a high-pressure and high-temperature gas working medium; then enters the heat release side of the second heat exchanger 4 to heat the flue gas entering the desorption heater 5, and the working medium becomes a high-pressure and high-temperature liquid working medium; then enters the temperature reduction and pressure reduction equipment 7, and the working medium after temperature reduction and pressure reduction becomes a low-temperature and low-pressure liquid or a gas-liquid mixed working medium, and then enters the first heat exchanger 3.

[0034] A portion of the flue gas enters the adsorption zone 101 of the molecular sieve rotor 1 through the inlet of the adsorption zone 101 and is discharged from the outlet of the adsorption zone 101 after being adsorbed and purified by the molecular sieve. The purified flue gas is subsequently directly discharged or further processed.

[0035] A portion of the flue gas enters the cooling zone 103 through the inlet of the cooling zone 103, cooling the molecular sieve while simultaneously increasing the temperature of the flue gas. The heated flue gas is discharged from the outlet of the cooling zone 103 and then enters the heat absorbing side of the second heat exchanger 4 through the second heat absorbing side inlet 401. In the second heat exchanger 4, the flue gas exchanges heat with the working medium, increasing the temperature of the flue gas. The flue gas is then discharged from the second heat absorbing side outlet 402 and enters the desorption heater 5 through the flue gas inlet 51. The desorption heater 5 heats the flue gas. The heated flue gas is discharged through the flue gas outlet 52 and then enters the desorption zone 102 of the molecular sieve rotor 1 through the inlet of the desorption zone 102. The high-temperature flue gas causes the molecular sieve to increase in temperature while the molecular sieve absorbs heat and desorbs the previously absorbed flue gas components. Subsequently, the flue gas is discharged from the outlet of the desorption zone 102 and enters the gas treatment device 2. The gas treatment device 2 further treats the flue gas concentrated by the molecular sieve rotor 1. After being processed by the gas treatment device 2, high-temperature flue gas is formed. The high-temperature flue gas enters the heat release side of the first heat exchanger 3 through the first heat release side inlet 303. Within the first heat exchanger 3, the high-temperature flue gas undergoes heat exchange with the low-temperature, low-pressure liquid or gas-liquid mixed working medium on the heat absorption side of the first heat exchanger 3, recovering the flue gas's waste heat and converting the working medium into a low-temperature, low-pressure gaseous working medium. The flue gas discharged from the first heat release side outlet 304 of the first heat exchanger 3 is subsequently directly discharged or further processed. The working medium discharged from the first heat absorption side outlet 302 of the first heat exchanger 3 enters the compressor 6, which pressurizes and heats the working medium, converting it into a high-pressure, high-temperature gas, which then enters the second heat exchanger 4.

[0036] The molecular sieve rotor system 100 with waste heat recovery in the embodiment of the present invention is provided with a heat pump unit to form a working medium circulation loop. The first heat exchanger 3 performs heat exchange on the high-temperature flue gas generated by the gas treatment device 2 with a low-temperature and low-pressure liquid or a gas-liquid mixed working medium, so that the temperature of the high-temperature flue gas is reduced and the temperature of the working medium is increased. This not only recovers the thermal energy of the high-temperature flue gas, reduces the exhaust emission temperature, and reduces environmental thermal pollution, but also utilizes the high-temperature working medium gas through the second heat exchanger 4 to heat the desorption airflow, thereby increasing the temperature of the desorption airflow when entering the desorption heater 5, thereby reducing the energy consumption of the desorption heater 5 for heating the gas, thereby reducing the operating cost of the molecular sieve rotor system 100 with waste heat recovery in the embodiment of the present invention and further reducing environmental thermal pollution.

[0037] Thus, the molecular sieve rotor system 100 with waste heat recovery in the embodiment of the present invention can recycle the waste heat generated by the system to preheat the hot air flow for desorption, thereby reducing the energy consumption of the desorption heater 5, reducing the operating costs of the system and reducing environmental thermal pollution. In addition, the molecular sieve rotor system 100 with waste heat recovery in the embodiment of the present invention reuses the waste heat for self-preheating, which has no impact on the main adsorption / desorption process of the molecular sieve rotor 1, nor on upstream and downstream processes. At the same time, the working fluid circulation path can be activated or deactivated at any time, which is highly flexible and versatile.

[0038] The molecular sieve rotor system 100 for waste heat recovery of an embodiment of the present invention includes a molecular sieve rotor 1, a gas treatment device 2, a desorption heater 5, a heat pump unit, a third heat exchanger 8, a three-way valve 9, a filter 10, a fourth heat exchanger 11, an adsorption fan 12 and a desorption fan 13.

[0039] Filter 10 is located upstream of the inlet of the cooling zone 103 and the inlet of the adsorption zone 101 of the molecular sieve rotor 1. The inlet of filter 10 is connected to the flue gas source, and the outlet of filter 10 is connected to the inlet of three-way valve 9. The flue gas source to be treated enters filter 10, which removes impurities such as large particles, dust, and droplets from the flue gas.

[0040] Specifically, the filter 10 is a single-stage filter or a multi-stage filter, for example, an activated carbon filter, a bag filter or an electrostatic precipitator.

[0041] The fourth heat exchanger 11 has a fourth heat release side inlet 1101 and a fourth heat release side outlet 1102. The fourth heat release side inlet 1101 is connected to the outlet of the filter 10, and the fourth heat release side outlet 1102 is connected to the inlet of the three-way valve 9. The fourth heat exchanger 11 cools the flue gas temperature.

[0042] Specifically, the fourth heat exchanger 11 is a tubular heat exchanger or a plate heat exchanger, and the cooling medium on the heat absorption side of the fourth heat exchanger 11 includes but is not limited to water, thermal oil, air, etc. The heat absorption side of the fourth heat exchanger 11 is equipped with a cooling tower or a heat supply pipe network for heat users.

[0043] The adsorption fan 12 is provided between the fourth heat exchanger 11 and the three-way valve 9. The inlet of the adsorption fan 12 is connected to the fourth heat release side outlet 1102, and the outlet of the adsorption fan 12 is connected to the inlet of the three-way valve 9. The adsorption fan 12 adds power to the flue gas.

[0044] The molecular sieve rotor 1 has an adsorption zone 101, a desorption zone 102, and a cooling zone 103. The two outlets of the three-way valve 9 are connected to the inlet of the adsorption zone 101 and the inlet of the cooling zone 103, respectively. After passing through the filter 10, the heat release side of the second heat exchanger 4, and the adsorption fan 12, the flue gas to be treated enters the adsorption zone 101 and the cooling zone 103 of the molecular sieve rotor 1 through the three-way valve 9.

[0045] The flow rate of flue gas entering the adsorption zone 101 and the cooling zone 103 is regulated by adjusting the three-way valve 9. Under normal circumstances, the flow rate of flue gas entering the adsorption zone 101 is greater than the flow rate of flue gas entering the cooling zone 103. The three-way valve 9 adjusts the valve opening according to the on-site flue gas composition, molecular sieve type, and environmental protection requirements for flue gas emissions, thereby achieving flow and pressure control of the flue gas in the adsorption zone 101 and the cooling zone 103.

[0046] The molecular sieve rotor 1 is equipped with a motor (not shown in the figure), a transmission device (not shown in the figure), a sealing component (not shown in the figure) and a supporting structure (not shown in the figure). Multiple discs (not shown in the figure) are installed in the molecular sieve rotor 1, on which molecular sieve particles are fixed. The rotor speed is 1-6 rpm. The type of molecular sieve particles is selected according to the on-site flue gas composition and on-site restrictions on working temperature, pressure, etc.

[0047] The flue gas discharged from the outlet of the adsorption zone 101 is discharged to the outside or further processed. The flue gas discharged from the outlet of the cooling zone 103 flows to the inlet of the desorption zone 102.

[0048] The inlet of the desorption fan 13 is connected to the outlet of the desorption zone 102, and the outlet of the desorption fan 13 is connected to the inlet of the gas treatment device 2. The desorption fan 13 adds power to the flow of the flue gas.

[0049] Both the adsorption fan 12 and the desorption fan 13 are electrically driven fans, such as centrifugal fans or axial flow fans.

[0050] The inlet of gas treatment device 2 is connected to the outlet of desorption blower 13. Gas treatment device 2 processes the flue gas concentrated by desorption zone 102, including combustible incineration, desulfurization, and denitrification. Gas treatment device 2 selects a corresponding combination of treatment technologies based on the composition of the flue gas to be treated on site. Gas treatment device 2 is a regenerative gas treatment device or a gas treatment device with a heat recovery component. For example, furnaces, reaction towers, and other devices use regenerative gas treatment devices or gas treatment devices with heat recovery components to reduce waste heat.

[0051] In some embodiments, the third heat exchanger 8 has a third heat-absorbing inlet 801, a third heat-absorbing outlet 802, a third heat-releasing inlet 803, and a third heat-releasing outlet 804. The third heat-releasing inlet 803 is in communication with the outlet of the gas processing device 2, the third heat-releasing outlet 804 is in communication with the first heat-releasing inlet 303, the third heat-absorbing inlet 801 is in communication with the outlet of the cooling zone 103, and the third heat-absorbing outlet 802 is in communication with the second heat-absorbing inlet 401. High-temperature flue gas discharged from the outlet of the gas processing device 2 enters the heat-releasing side of the third heat exchanger 8 through the third heat-releasing inlet 803, and flue gas discharged from the outlet of the cooling zone 103 enters the heat-releasing side of the third heat exchanger 8 through the third heat-releasing inlet 801, whereby the high-temperature flue gas and the flue gas undergo heat exchange. After heat exchange, the high-temperature flue gas on the heat release side is cooled down and discharged from the third heat release side outlet 804 to the first heat exchanger 3 , while the low-temperature flue gas on the heat absorption side is cooled down and discharged from the third heat absorption side outlet 802 to the desorption zone 102 .

[0052] The setting of the third heat exchanger 8 enables heat exchange between the high-temperature flue gas and the desorption flue gas, so that the temperature of the treated high-temperature flue gas is reduced and the temperature of the flue gas flowing to the desorption zone 102 is increased, thereby further recovering the waste heat generated by the system and using it to heat its own desorption airflow, thereby further reducing the energy consumption of the desorption heater 5, reducing the operating cost of the system and environmental thermal pollution.

[0053] Specifically, the third heat exchanger 8 is a regenerator.

[0054] The heat pump unit includes a first heat exchanger 3, a second heat exchanger 4, a compressor 6, and a temperature and pressure reduction device 7. The first heat exchanger 3 has a first heat absorption side inlet 301, a first heat absorption side outlet 302, a first heat release side inlet 303, and a first heat release side outlet 304. The first heat release side inlet 303 is connected to the third heat absorption side outlet 802. The second heat exchanger 4 has a second heat absorption side inlet 401, a second heat absorption side outlet 402, a second heat release side inlet 403, and a second heat release side outlet 404. The second heat absorption side inlet 401 is connected to the outlet of the cooling zone 103. The desorption heater 5 has a flue gas inlet 51 and a flue gas outlet 52. The flue gas inlet 51 is connected to the second heat absorption side outlet 402, and the flue gas outlet 52 is connected to the inlet of the desorption zone 102. The first heat absorbing side outlet 302, the compressor 6, the second heat releasing side inlet 403, the second heat releasing side outlet 404, the temperature reduction and pressure reduction device 7 and the first heat absorbing side inlet 301 are connected in sequence to form a working medium circulation loop.

[0055] The flue gas discharged from the heat release side of the third heat exchanger 8 enters the heat release side of the first heat exchanger 3 through the first heat release side inlet 303. The low-temperature, low-pressure liquid or gas-liquid mixed working medium flowing out of the decompression and temperature reduction device enters the heat absorption side of the first heat exchanger 3 through the first heat absorption side inlet 301. The flue gas and the working medium exchange heat. After the heat exchange, the flue gas temperature decreases and the working medium temperature increases. This further reduces the flue gas temperature and achieves heating of the working medium.

[0056] The heated working fluid is pressurized and heated by compressor 6, becoming a high-pressure, high-temperature gaseous working fluid. It then enters the heat-releasing side of the second heat exchanger 4 through the second heat-releasing side inlet 403. The flue gas discharged from the third heat-absorbing side outlet 802 of the third heat exchanger 8 enters the heat-absorbing side of the second heat exchanger 4 through the second heat-absorbing side inlet 401. The flue gas absorbs heat from the working fluid, transforming it from a high-temperature, high-pressure gas into a high-temperature, high-pressure liquid, raising its temperature. After heat exchange, the high-temperature, high-pressure liquid working fluid is discharged from the second heat-releasing side outlet 404 and flows to the desuperheating and pressure reducing device 7, which reduces the working fluid's pressure and temperature, transforming it into a low-temperature, low-pressure liquid or a gas-liquid mixture. The heated flue gas then exits the second heat-absorbing side outlet 402 and flows to the desorption heater 5. After the desorption heater 5 heats the flue gas to a set temperature, the flue gas enters the desorption zone 102 for molecular sieve desorption.

[0057] Specifically, the temperature and pressure reduction device 7 is a throttle valve, which is a thermal throttle valve or an electronically controlled throttle valve.

[0058] The throttle valve has a simple structure, which can not only reduce the temperature and pressure of the high-temperature and high-pressure liquid working medium required by the molecular sieve rotor system 100, but also reduce the cost of the molecular sieve rotor system 100.

[0059] Specifically, the desorption heater 5 heats the flue gas through electricity, fuel or other waste heat.

[0060] The compressor 6 is a scroll compressor 6, a screw compressor 6 or a centrifugal compressor 6. The heat exchanger package is a partitioning heat exchanger or a heat pipe heat exchanger.

[0061] The first heat exchanger 3 is an evaporator, and the second heat exchanger 4 is a condenser.

[0062] Taking the example of the flue gas entering the molecular sieve rotor system 100 and cooling down to about 25°C after passing through the fourth heat exchanger 11, the flue gas temperature at various locations in the molecular sieve rotor system 100 is specifically described. Most of the flue gas is purified by the adsorption zone 101 of the molecular sieve rotor 1 and its temperature rises to about 35°C. A small portion of the flue gas is heated four times by the cooling zone 103, the third heat exchanger 8, the second heat exchanger 4 and the desorption heater 5 of the molecular sieve rotor 1, and its temperature is gradually increased to about 70°C, 125°C, 135°C and 180°C respectively. After passing through the desorption zone 102 of the molecular sieve rotor 1, the temperature of the flue gas is reduced to about 100°C, and after passing through the gas treatment device 2, the temperature is increased to about 130°C. After the treated flue gas is recovered twice by the third heat exchanger 8 and the first heat exchanger 3, its temperature is gradually reduced to about 75°C and 65°C respectively. It should be noted that, in this example, the flue gas treatment method of the gas treatment device 2 is non-incineration type. If in other embodiments, the flue gas treatment method of incineration is adopted, the gas treatment device 2 adopts a furnace, reaction tower, etc., which adopts a heat storage type or a gas treatment device with heat recovery components. The gas treatment device 2 itself can recover part of the heat energy of the flue gas after incineration, avoid the direct discharge of high-temperature flue gas after incineration, and reduce the waste of waste heat.

[0063] In other embodiments, the third heat-absorbing side inlet 801 of the third heat exchanger 8 is connected to the second heat-absorbing side outlet 402, and the third heat-absorbing side outlet 802 is connected to the flue gas inlet 51. Flue gas discharged from the cooling zone 103 of the molecular sieve rotor 1 first passes through the heating side of the second heat exchanger 4 and then through the heating side of the third heat exchanger 8 before flowing to the desorption heater 5. In other words, the order in which the flue gas flows through the second heat exchanger 4 and the third heat exchanger 8 can be adjusted based on the on-site flue gas processing temperature, the temperature of the working fluid, and other conditions, thereby enhancing the flexibility and versatility of the present molecular sieve rotor system 100.

[0064] The molecular sieve rotor system 100 and application method of the embodiment of the present invention reduces the overall energy consumption of the system, improves the waste heat recovery rate, and has high flexibility by recovering the waste heat of the discharged treated high-temperature flue gas in multiple stages.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0068] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0069] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A molecular sieve rotor system (100) with waste heat recovery, characterized in that: include: A molecular sieve rotor (1), the molecular sieve rotor (1) comprising an adsorption zone (101), a desorption zone (102), and a cooling zone (103), wherein an inlet of the adsorption zone (101) and an inlet of the cooling zone (103) are connected in parallel and are used to connect to a flue gas source; a gas processing device (2), wherein the inlet of the gas processing device (2) is in communication with the outlet of the desorption zone (102); a desorption heater (5), the desorption heater (5) having a flue gas inlet (51) and a flue gas outlet (52), the flue gas outlet (52) being in communication with the inlet of the desorption zone (102); and A heat pump unit, comprising a first heat exchanger (3), a second heat exchanger (4), a compressor (6) and a temperature reduction and pressure reduction device (7), wherein the first heat exchanger (3) has a first heat absorption side inlet (301), a first heat absorption side outlet (302), a first heat release side inlet (303) and a first heat release side outlet (304), wherein the first heat release side inlet (303) is connected to the outlet of the gas processing device (2), and the second heat exchanger (4) has a second heat absorption side inlet (401), a second heat absorption side outlet ( 402), a second heat releasing side inlet (403) and a second heat releasing side outlet (404), the second heat absorbing side inlet (401) is connected to the outlet of the cooling zone (103), the second heat absorbing side outlet (402) is connected to the flue gas inlet (51), the first heat absorbing side outlet (302), the compressor (6), the second heat releasing side inlet (403), the second heat releasing side outlet (404), the temperature reduction and pressure reduction device (7) and the first heat absorbing side inlet (301) are connected in sequence to form a working medium circulation loop.

2. The molecular sieve rotor system (100) with waste heat recovery according to claim 1 is characterized in that: The invention further comprises a third heat exchanger (8), wherein the third heat exchanger (8) has a third heat absorbing side inlet (801), a third heat absorbing side outlet (802), a third heat releasing side inlet (803) and a third heat releasing side outlet (804), wherein the third heat releasing side inlet (803) is connected to the outlet of the gas processing device (2), the third heat releasing side outlet (804) is connected to the first heat releasing side inlet (303), the third heat absorbing side inlet (801) is connected to the outlet of the cooling zone (103), the third heat absorbing side outlet (802) is connected to the second heat absorbing side inlet (401), or the third heat absorbing side inlet (801) is connected to the second heat absorbing side outlet (402), and the third heat absorbing side outlet (802) is connected to the flue gas inlet (51).

3. The molecular sieve rotor system (100) with waste heat recovery according to claim 1 is characterized in that: The temperature and pressure reduction device (7) is a throttle valve.

4. The molecular sieve rotor system (100) with waste heat recovery according to claim 1 is characterized in that: It further comprises a three-way valve (9), the inlet of the three-way valve (9) is used to connect to the flue gas source, and the two outlets of the three-way valve (9) are respectively connected to the inlet of the adsorption zone (101) and the inlet of the cooling zone (103).

5. The molecular sieve rotor system (100) with waste heat recovery according to claim 4 is characterized in that: It further comprises a filter (10), the inlet of the filter (10) is used to connect to the smoke source, and the outlet of the filter (10) is connected to the inlet of the three-way valve (9).

6. The molecular sieve rotor system (100) with waste heat recovery according to claim 5, characterized in that: The invention further comprises a fourth heat exchanger (11), wherein the fourth heat exchanger (11) has a fourth heat release side inlet (1101) and a fourth heat release side outlet (1102), wherein the fourth heat release side inlet (1101) is connected to the outlet of the filter (10), and the fourth heat release side outlet (1102) is connected to the inlet of the three-way valve (9).

7. The molecular sieve rotor system (100) with waste heat recovery according to claim 6 is characterized in that: It further comprises an adsorption fan (12), the inlet of the adsorption fan (12) is connected to the fourth heat release side outlet (1102), and the outlet of the adsorption fan (12) is connected to the inlet of the three-way valve (9).

8. The molecular sieve rotor system (100) with waste heat recovery according to claim 1, characterized in that: It further comprises a desorption fan (13), the inlet of the desorption fan (13) is connected to the outlet of the desorption zone (102), and the outlet of the desorption fan (13) is connected to the inlet of the gas processing device (2).

9. The molecular sieve rotor system (100) with waste heat recovery according to claim 1, characterized in that: The first heat exchanger (3) is an evaporator; and / or, the second heat exchanger (4) is a condenser; and / or, the gas processing device (2) is a heat storage type gas processing device or a gas processing device with a heat recovery component.

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