Molecular sieve runner system matched with waste heat recovery and application method

Abstract

The invention relates to a molecular sieve runner system matched with waste heat recovery and an application method. 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 an outlet of the cooling area, a smoke 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, the operation cost and environmental thermal pollution are reduced, the main process of adsorption / desorption of the molecular sieve runner is not influenced, upstream and downstream processes are not influenced, 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 invention relates to the technical field of molecular sieve rotor flue gas treatment, and in particular to a molecular sieve rotor system with waste heat recovery and an application method thereof. 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, the recovery and purification of volatile organic compounds. In the traditional molecular sieve rotor, 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 the related technology, there are still many problems to be solved in the molecular sieve rotor flue gas treatment system: the desorption heater 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 has a further increase in temperature during the post-treatment process, and the waste heat recovery lacks attention 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 has poor versatility. Summary of the invention

[0003] The present invention 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] An embodiment of the present invention provides an application method of a molecular sieve rotor system with waste heat recovery.

[0006] The molecular sieve rotor system for waste heat recovery according to an embodiment of the present invention comprises a molecular sieve rotor, a gas treatment device, a desorption heater and a heat pump unit, wherein the molecular sieve rotor has an adsorption zone, a desorption zone and a cooling zone, wherein the inlet of the adsorption zone and the inlet of the cooling zone are connected in parallel and are used to connect to a 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, wherein the flue gas outlet is connected to the inlet of the desorption zone; the heat pump unit comprises a first heat exchanger, a second heat exchanger, a compressor and a temperature and pressure reduction device, wherein the first heat exchanger has 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 with 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 with the outlet of the cooling zone, the second heat absorption side outlet is connected with 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.

[0007] The molecular sieve rotor system with waste heat recovery in the embodiment of the present invention can recycle the waste heat generated by the system through a heat pump unit to preheat the hot air flow for desorption, thereby reducing the energy consumption of the desorption heater, reducing the operating cost of the system and the environmental thermal pollution. In addition, the molecular sieve rotor system with waste heat recovery in the embodiment of the present invention reuses the waste heat for self-heating, which has no effect on the main process of molecular sieve rotor adsorption / desorption, and has no effect on upstream and downstream processes. At the same time, the working fluid circulation path can be activated or deactivated at any time, and has high flexibility and versatility.

[0008] In some embodiments, the molecular sieve rotor system with waste heat recovery further includes a third heat exchanger, wherein the third heat exchanger has 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, wherein 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.

[0009] In some embodiments, the temperature and pressure reduction device is a throttle valve.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In some embodiments, the first heat exchanger is an evaporator, the second heat exchanger is a condenser, and the gas processing device is a heat storage type gas processing device or a gas processing device with a heat recovery component.

[0016] The application method of the molecular sieve rotor system with waste heat recovery in the embodiment of the present invention includes the following steps: introducing working fluid into the working fluid circulation loop, the working fluid enters the first heat exchanger to absorb heat, recovers the thermal energy of the flue gas of the gas treatment device, and then enters the compressor, and is pressurized and heated by the compressor to form a high-temperature and high-pressure gas working fluid, and then enters the heat release side of the second heat exchanger to heat the flue gas entering the desorption heater, and then enters the cooling and pressure reduction equipment, and the working fluid after cooling and pressure reduction enters the first heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a molecular sieve rotor system according to an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of an example of a molecular sieve rotor system of the present invention;

[0019] Reference numerals:

[0020] Molecular sieve rotor system 100;

[0021] Molecular sieve rotor 1, adsorption zone 101, desorption zone 102, cooling zone 103;

[0022] Gas processing device 2;

[0023] 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;

[0024] 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;

[0025] Desorption heater 5, flue gas inlet 51, flue gas outlet 52;

[0026] Compressor 6, temperature and pressure reduction equipment 7;

[0027] A third heat exchanger 8, 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;

[0028] Three-way valve 9, filter 10;

[0029] The fourth heat exchanger 11, the fourth heat release side inlet 1101, the fourth heat release side outlet 1102;

[0030] Adsorption fan 12, desorption fan 13. DETAILED DESCRIPTION

[0031] 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.

[0032] 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.

[0033] The molecular sieve rotor system 100 for waste heat recovery according to the embodiment of the present invention comprises a molecular sieve rotor 1, a gas treatment device 2, a desorption heater 5 and a heat pump unit.

[0034] The molecular sieve rotor 1 has 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 the 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, and the flue gas outlet 52 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 processing 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.

[0035] The application method of the molecular sieve rotor system 100 with waste heat recovery according to the embodiment of the present invention includes the following steps: introducing working fluid into the working fluid circulation loop, the working fluid 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 entering the compressor 6, and after being pressurized and heated by the compressor 6, the working fluid is converted into a high-pressure and high-temperature gas working fluid; then entering the heat release side of the second heat exchanger 4 to heat the flue gas entering the desorption heater 5, and the working fluid is converted into a high-pressure and high-temperature liquid working fluid; then entering the temperature and pressure reduction device 7, the working fluid after temperature and pressure reduction is converted into a low-temperature and low-pressure liquid or a gas-liquid mixed working fluid, and then enters the first heat exchanger 3.

[0036] 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.

[0037] A portion of the flue gas enters the cooling zone 103 through the inlet of the cooling zone 103, so that the molecular sieve is cooled, and the flue gas is heated at the same time. The heated flue gas is discharged from the outlet of the cooling zone 103, and then enters the heat absorption side of the second heat exchanger 4 through the second heat absorption side inlet 401. In the second heat exchanger 4, the flue gas exchanges heat with the working medium, and the flue gas temperature increases. Then, it is discharged from the second heat absorption 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 heats the molecular sieve, and 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 processing device 2, high-temperature flue gas is formed, and the high-temperature flue gas enters the heat release side of the first heat exchanger 3 through the first heat release side inlet 303. In the first heat exchanger 3, the high-temperature flue gas exchanges heat with the low-temperature and low-pressure liquid or gas-liquid mixed working medium on the heat absorption side of the first heat exchanger 3, recovers the waste heat of the flue gas, and turns the working medium into a low-temperature and low-pressure gas working medium. The flue gas discharged from the first heat release side outlet 304 of the first heat exchanger 3 is 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, turning it into a high-pressure and high-temperature gas, and then enters the second heat exchanger 4.

[0038] 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 fluid circulation loop. The first heat exchanger 3 performs heat exchange on the high-temperature flue gas generated by the gas processing device 2 with a low-temperature and low-pressure liquid or a gas-liquid mixed working fluid, so that the temperature of the high-temperature flue gas is reduced and the temperature of the working fluid is increased, thereby recovering the thermal energy of the high-temperature flue gas, reducing the exhaust gas emission temperature, and reducing environmental thermal pollution. In addition, the high-temperature working fluid gas is used to heat the desorption airflow through the second heat exchanger 4, thereby increasing the temperature of the desorption airflow when it enters 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.

[0039] Therefore, the molecular sieve rotor system 100 with waste heat recovery according to the embodiment of the present invention 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 5, and reducing the operating cost of the system and the environmental thermal pollution. In addition, the molecular sieve rotor system 100 with waste heat recovery according to the embodiment of the present invention reuses the waste heat for self-preheating, which has no effect on the main process of adsorption / desorption of the molecular sieve rotor 1, and has no effect on the upstream and downstream processes. At the same time, the working fluid circulation path can be activated or deactivated at any time, and has high flexibility and versatility.

[0040] The molecular sieve rotor system 100 for waste heat recovery according to 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.

[0041] The 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 the filter 10 is used to connect to the flue gas source, and the outlet of the filter 10 is connected to the inlet of the three-way valve 9. The flue gas source to be treated enters the filter 10, and the filter 10 removes impurities such as large particles, dust and droplets in the flue gas.

[0042] 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.

[0043] 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.

[0044] 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, heat transfer oil, air, etc. The heat absorption side of the fourth heat exchanger 11 is equipped with a cooling tower or a heat user heating network.

[0045] The adsorption fan 12 is disposed 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.

[0046] 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 respectively connected to the inlet of the adsorption zone 101 and the inlet of the cooling zone 103. The flue gas source to be treated passes through the filter 10, the heat release side of the second heat exchanger 4 and the adsorption fan 12, and then enters the adsorption zone 101 and the cooling zone 103 of the molecular sieve rotor 1 through the three-way valve 9.

[0047] The flow rate of the flue gas entering the adsorption zone 101 and the cooling zone 103 is adjusted by adjusting the three-way valve 9. Under normal conditions, the flow rate of the flue gas entering the adsorption zone 101 is greater than the flow rate of the 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 emission, thereby achieving flow and pressure control of the flue gas in the adsorption zone 101 and the flue gas in the cooling zone 103.

[0048] 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). A plurality of 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 1-6rpm, and 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.

[0049] 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.

[0050] The inlet of the desorption fan 13 is communicated with the outlet of the desorption zone 102, and the outlet of the desorption fan 13 is communicated with the inlet of the gas processing device 2. The desorption fan 13 adds power to the flow of the flue gas.

[0051] Both the adsorption fan 12 and the desorption fan 13 are electrically driven fans, such as centrifugal fans or axial flow fans.

[0052] The inlet of the gas treatment device 2 is connected to the outlet of the desorption fan 13. The gas treatment device 2 processes the flue gas concentrated by the desorption zone 102, including combustible incineration, desulfurization, and denitrification. The gas treatment device 2 selects a corresponding treatment technology combination according to the components of the flue gas to be treated on site. The gas treatment device 2 is a heat storage gas treatment device or a gas treatment device with a heat recovery component. For example, a furnace, a reaction tower, etc. use a heat storage gas treatment device or a gas treatment device with a heat recovery component to reduce waste heat.

[0053] In some embodiments, 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. 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, and the third heat absorbing side outlet 802 is connected to the second heat absorbing side inlet 401. The 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 side inlet 803, and the flue gas discharged from the outlet of the cooling zone 103 enters the heat absorbing side of the third heat exchanger 8 through the third heat absorbing side inlet 801, and the high-temperature flue gas and the flue gas are heat exchanged. 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 flow 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 flow to the desorption zone 102 .

[0054] The third heat exchanger 8 is provided to perform 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 the environmental thermal pollution.

[0055] Specifically, the third heat exchanger 8 is a regenerator.

[0056] 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, and 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, and 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, and 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 sequentially connected to form a working medium circulation loop.

[0057] 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, and the low-temperature and 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 perform heat exchange. After the heat exchange, the flue gas temperature decreases and the working medium temperature increases, thereby further reducing the temperature of the flue gas and achieving heating of the working medium.

[0058] The heated working medium is pressurized and heated by the compressor 6 to become a high-pressure and high-temperature gaseous working medium, and then enters the heat release side of the second heat exchanger 4 through the second heat release side inlet 403. The flue gas discharged from the third heat absorption side outlet 802 of the third heat exchanger 8 enters the heat absorption side of the second heat exchanger 4 through the second heat absorption side inlet 401. The flue gas absorbs the heat of the working medium, so that the working medium changes from a high-temperature and high-pressure gas to a high-temperature and high-pressure liquid, and the flue gas temperature increases. After heat exchange, the high-temperature and high-pressure liquid working medium is discharged from the second heat release side outlet 404 and flows to the temperature reduction and pressure reduction device 7. The temperature reduction and pressure reduction device 7 reduces the pressure and temperature of the working medium, so that the working medium changes to a low-temperature and low-pressure liquid or a gas-liquid mixed working medium. The heated flue gas is discharged from the second heat absorption side outlet 402 and flows to the desorption heater 5. After the desorption heater 5 heats the flue gas to the set temperature, the flue gas enters the desorption zone 102 for desorption of the molecular sieve.

[0059] Specifically, the temperature and pressure reduction device 7 is a throttle valve, which is a thermal throttle valve or an electronically controlled throttle valve.

[0060] 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.

[0061] Specifically, the desorption heater 5 heats the flue gas through electricity, fuel or other waste heat.

[0062] The compressor 6 is a scroll compressor 6, a screw compressor 6 or a centrifugal compressor 6. The heat exchanger package is a partition heat exchanger or a heat pipe heat exchanger.

[0063] The first heat exchanger 3 is an evaporator, and the second heat exchanger 4 is a condenser.

[0064] Taking the example that the flue gas entering the molecular sieve rotor system 100 is cooled by the fourth heat exchanger 11 and the temperature drops to about 25°C, the flue gas temperature at various locations of the molecular sieve rotor system 100 is specifically described. Most of the flue gas is heated to about 35°C after being purified by the adsorption zone 101 of the molecular sieve rotor 1. A small part 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 the temperature is gradually increased to about 70°C, 125°C, 135°C and 180°C respectively. The temperature of the flue gas is reduced to about 100°C after passing through the desorption zone 102 of the molecular sieve rotor 1, and the temperature is increased to about 130°C after passing through the gas treatment device 2. The temperature of the treated flue gas is gradually reduced to about 75°C and 65°C after the waste heat is recovered twice by the third heat exchanger 8 and the first heat exchanger 3. 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 and other gas treatment devices that adopt heat storage type or have heat recovery components. The gas treatment device 2 itself can recover a part of the heat energy of the flue gas after incineration, avoid direct discharge of high-temperature flue gas after incineration, so as to reduce waste heat.

[0065] In some other embodiments, the third heat absorption side inlet 801 of the third heat exchanger 8 is connected to the second heat absorption side outlet 402, and the third heat absorption side outlet 802 is connected to the flue gas inlet 51. The 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 passes through the heating side of the third heat exchanger 8, and then flows to the desorption heater 5. That is, the order in which the flue gas flows through the second heat exchanger 4 and the third heat exchanger 8 can be adjusted according to the processing temperature of the on-site flue gas, the temperature of the working fluid, etc., thereby improving the flexibility and versatility of the molecular sieve rotor system 100.

[0066] 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 performing multi-stage waste heat recovery on the discharged treated high-temperature flue gas.

[0067] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0068] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0069] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0071] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary 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 connected to the outlet of the desorption zone (102); a desorption heater (5), the desorption heater (5) having a smoke inlet (51) and a smoke outlet (52), the smoke outlet (52) being connected to the inlet of the desorption zone (102); and, A heat pump unit, the 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), the first heat exchanger (3) having 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) being connected to the outlet of the gas processing device (2), the second heat exchanger (4) having 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, 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, 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, characterized in that: It further comprises a three-way valve (9), the inlet of the three-way valve (9) is used to connect to a 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, characterized in that: It further comprises a filter (10), the inlet of the filter (10) is used to connect to a 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 5, characterized in that: It further comprises an adsorption fan (12), the inlet of the adsorption fan (12) being connected to the fourth heat release side outlet (1102), and the outlet of the adsorption fan (12) being 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.

10. An application method of a molecular sieve rotor system (100) with waste heat recovery, characterized in that: The molecular sieve rotor system (100) with waste heat recovery according to any one of claims 1 to 9 comprises the following steps: introducing working fluid into the working fluid circulation loop, the working fluid entering the first heat exchanger (3) to absorb heat, recovering the heat energy of the flue gas of the gas processing device (2), and then entering the compressor (6), forming a high-temperature and high-pressure gas working fluid after being pressurized and heated by the compressor (6), and then entering the heat release side of the second heat exchanger (4) to heat the flue gas entering the desorption heater (5), and then entering the cooling and pressure reduction device (7), and the working fluid after cooling and pressure reduction enters the first heat exchanger (3).

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