Intelligent adjustment high-altitude discharge device with waste gas waste heat recovery function

Abstract

The invention discloses an intelligent adjustment high-altitude discharge device with a waste gas waste heat recovery function, external waste gas passes through a dust remover and then enters a desulfurization and denitrification tower, a pressurization high-altitude discharge tower is connected with the desulfurization and denitrification tower, and a waste heat recovery device comprises a magnetic suspension turbine expander and is connected with the dust remover. After waste gas passes through the waste heat recovery device, water in the waste gas is converted into high steam pressure to push a centripetal worm gear in a built-in magnetic suspension turbo expander to rotate, the centripetal worm gear rotates to drive a permanent magnet synchronous motor to generate electricity, and electricity generated by the permanent magnet synchronous motor is stored by an external energy storage facility to be used by a dust remover, a desulfurization and denitrification tower and a pressurized high-altitude discharge tower. According to the technical scheme, the permanent magnet synchronous motor is driven by the magnetic suspension turbo expander to generate power for the dust remover, the desulfurization and denitrification tower and the pressurized high-altitude discharge tower, so that the technical effect of effective application of waste gas heat energy is achieved, and the problem that heat energy of waste gas cannot be utilized by existing waste gas discharge equipment is solved.

Description

Technical Field

[0001] The invention relates to the field of waste gas emission, in particular to a high-altitude waste gas emission device with intelligent regulation. Background Art

[0002] Industrial waste gas generated in metallurgy, petrochemical, electric power and other fields is transported to desulfurization and denitrification towers through fans and finally discharged into the chimney. This is a common way to discharge air pollutants. These waste gases to be discharged generally have high temperatures, and the temperature of the gas discharged from the chimney still remains at 200-300°C. Failure to utilize the high-temperature thermal energy is a waste of resources. Summary of the invention

[0003] The present invention discloses an intelligent regulating high-altitude discharge device with waste heat recovery function of waste gas. After passing through a dust collector, the external waste gas enters a desulfurization and denitration tower. The pressurized high-altitude discharge tower is connected to the desulfurization and denitration tower. The waste heat recovery device includes: a magnetic levitation turbine expander. The waste heat recovery device is connected to the dust collector. After the waste gas passes through the waste heat recovery device, the internal water is converted into a higher steam pressure to drive the centripetal worm gear in the internal magnetic levitation turbine expander to rotate. The rotation of the centripetal worm gear drives the permanent magnet synchronous motor to generate electricity. The electricity generated by the permanent magnet synchronous motor is stored by an external energy storage facility to supply electricity to the dust collector, the desulfurization and denitration tower, and the pressurized high-altitude discharge tower. The present invention realizes the technical effect of effective application of waste gas heat energy through the technical solution of using a magnetic levitation turbine expander to drive a permanent magnet synchronous motor to generate electricity to supply electricity to the dust collector, the desulfurization and denitration tower, and the pressurized high-altitude discharge tower, and solves the problem that the existing waste gas discharge equipment does not utilize the heat energy of the waste gas.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] An intelligent adjustable high-altitude emission device with waste heat recovery function of exhaust gas comprises: a dust collector and a desulfurization and denitration tower. The external exhaust gas enters the desulfurization and denitration tower after passing through the dust collector, and comprises: a waste heat recovery device and a pressurized high-altitude emission tower. The pressurized high-altitude emission tower is connected with the desulfurization and denitration tower. The waste heat recovery device comprises: a magnetic levitation turbine expander. The waste heat recovery device is connected with the dust collector. After the exhaust gas passes through the waste heat recovery device, the internal water is converted into a higher steam pressure to drive the centrifugal worm gear in the internal magnetic levitation turbine expander to rotate. The rotation of the centrifugal worm gear drives the permanent magnet synchronous motor to generate electricity. The electricity generated by the permanent magnet synchronous motor is stored by an external energy storage facility to supply electricity to the dust collector, the desulfurization and denitration tower, and the pressurized high-altitude emission tower.

[0006] It is further configured that the magnetic levitation turbine expander is provided with an air inlet and an air outlet. After water vapor enters from the air inlet, it drives the centrifugal worm gear to rotate and is blown out from the air outlet into the dust collector. A seal is provided between the motor housing of the permanent magnet synchronous motor and the magnetic levitation turbine expander. The centrifugal worm gear is connected to the permanent magnet synchronous motor through a turbine shaft. A five-degree-of-freedom magnetic levitation bearing is provided between the turbine shaft and the permanent magnet synchronous motor.

[0007] It is further configured that the pressurized high-altitude emission tower includes: an air intake unit, an acceleration unit, and a remote smoke gas concentration monitor. The air intake unit is connected to the acceleration unit, exhaust gas enters from the air intake unit, and smoke is discharged from the acceleration unit. The acceleration unit is equipped with a remote smoke gas concentration monitor and a remote smoke gas concentration and wind speed detection controller. The remote smoke gas concentration monitor can control the speed of exhaust gas entering the air intake unit, and the remote smoke gas concentration monitor can control the amount of external air introduced into the acceleration unit by the acceleration unit; the remote smoke gas concentration and wind speed detection controller can control the acceleration amplitude of the exhaust gas by the acceleration unit.

[0008] It is further configured that the air intake unit includes an air intake box, a fan, a second intelligent regulating air valve, and a second motor. The second motor controls the wind speed of the fan, and the exhaust gas enters the fan from the second intelligent regulating air valve through the air intake box.

[0009] It is further configured that the acceleration unit includes: an air collector, a three-flow back-swinging impeller, a volute, a remote smoke concentration monitor, a first intelligent regulating air valve, a wind shield, a second motor, a rotating shaft, a remote smoke concentration and wind speed detection controller, and a first motor.

[0010] It is further configured that after the exhaust gas is discharged from the fan and enters the wind collector, it is sent into the serrated three-flow swing-back impeller for secondary pressurization of the exhaust gas and then sent into the volute. The remote flue gas concentration monitor in the volute can detect the exhaust gas concentration in the space. When the exhaust gas concentration does not meet the standard, the first intelligent regulating air valve can be controlled to allow external air to enter the volute and the second intelligent regulating air valve can be controlled to reduce the entry of exhaust gas. The diluted exhaust gas that meets the standard is discharged upward through the wind shield. A remote flue gas concentration and wind speed detection controller is arranged on the top of the wind shield. The remote flue gas concentration and wind speed detection controller can detect the exhaust gas concentration and wind speed inside the wind shield. The remote flue gas concentration and wind speed detection controller can detect the atmospheric side wind speed outside the wind shield. The remote flue gas concentration and wind speed detection controller can control the rotation speed of the serrated three-flow swing-back impeller by controlling the second motor.

[0011] The present invention achieves the technical effect of effective application of exhaust gas thermal energy through the technical solution of using a magnetically suspended turbine expander to drive a permanent magnet synchronous motor to generate electricity for a dust collector, a desulfurization and denitrification tower, and a pressurized high-altitude emission tower, thereby solving the problem that the existing exhaust gas emission equipment does not utilize the thermal energy of the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic diagram of the present invention;

[0013] Figure 2 A schematic diagram of a magnetically suspended turbine expander according to the present invention;

[0014] Figure 3 is a schematic diagram of an air intake unit and an acceleration unit of the present invention;

[0015] Figure 4 It is a schematic diagram of various parameters of high-altitude emission of the present invention;

[0016] In the figure: air collector 1, serrated three-flow back-swinging impeller 2, remote flue gas concentration monitor 3, volute 4, first intelligent regulating air valve 5, second intelligent regulating air valve 51, wind shield 6, remote monitoring flue gas concentration controller 7, impeller shaft 8, air intake box 9, fan 10, waste heat recovery device 11, dust collector 12, desulfurization and denitrification tower 13, pressurized high-altitude emission tower 14, first motor 15, second motor 16, permanent magnet synchronous motor 21, motor housing 22, turbine shaft 23, air inlet 24, magnetic levitation turbine expander 25, air outlet 26, centripetal worm gear 27, seal 28, five-degree-of-freedom magnetic levitation bearing 29. DETAILED DESCRIPTION

[0017] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] Secondly, the present invention is described in detail with reference to schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0020] To make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0021] According to the contents of the claims and the description, the specific implementation is as follows:

[0022] like Figure 1 and Figure 3As shown: an intelligent adjustable high-altitude emission device with waste heat recovery function of exhaust gas, comprising: a dust collector 12, a desulfurization and denitrification tower 13, the external exhaust gas enters the desulfurization and denitrification tower 13 after passing through the dust collector 12, and is characterized in that it comprises: a waste heat recovery device 11, a pressurized high-altitude emission tower 14, the pressurized high-altitude emission tower 14 is connected to the desulfurization and denitrification tower 13, the waste heat recovery device 11 comprises: a magnetic levitation turbine expander 25, the waste heat recovery device 11 is connected to the dust collector 12, after the exhaust gas passes through the waste heat recovery device 11, the internal water is converted into a higher steam pressure to drive the centripetal worm gear 27 in the built-in magnetic levitation turbine expander 25 to rotate, the rotation of the centripetal worm gear 27 drives the permanent magnet synchronous motor 21 to generate electricity, and the electricity generated by the permanent magnet synchronous motor 21 is stored by the external energy storage facility to supply electricity to the dust collector 12, the desulfurization and denitrification tower 13, and the pressurized high-altitude emission tower 14.

[0023] Preferably, the magnetic levitation turbine expander 25 is provided with an air inlet 24 and an air outlet 26. After water vapor enters from the air inlet 24, it drives the centrifugal worm gear 27 to rotate and is then blown out from the air outlet 26 into the dust collector 12. A seal 28 is provided between the motor housing 22 of the permanent magnet synchronous motor 21 and the magnetic levitation turbine expander 25. The centrifugal worm gear 27 is connected to the permanent magnet synchronous motor 21 through the turbine shaft 23. A five-degree-of-freedom magnetic levitation bearing 29 is provided between the turbine shaft 23 and the permanent magnet synchronous motor 21.

[0024] The present invention achieves the technical effect of effective application of waste gas thermal energy through the technical solution of using a magnetically suspended turbine expander 25 to drive a permanent magnet synchronous motor 21 to generate electricity for the dust collector 12, the desulfurization and denitrification tower 13, and the pressurized high-altitude emission tower 14, and solves the problem that the existing waste gas emission equipment does not utilize the thermal energy of the waste gas.

[0025] The waste heat recovery device 11 of the present invention achieves the technical effect of waste heat recovery, and the five-degree-of-freedom magnetic bearing 29 reduces kinetic energy loss and increases the conversion efficiency of kinetic energy into electrical energy.

[0026] Preferably, the pressurized high-altitude emission tower 14 includes: an air intake unit, an acceleration unit, and a remote flue gas concentration monitor 3. The air intake unit is connected to the acceleration unit, exhaust gas enters from the air intake unit, and flue gas is discharged from the acceleration unit. The acceleration unit is equipped with a remote flue gas concentration monitor 3 and a remote flue gas concentration and wind speed detection controller 7. The remote flue gas concentration monitor 3 can control the speed of exhaust gas entering the air intake unit, and the remote flue gas concentration monitor 3 can control the amount of external air introduced into the acceleration unit by the acceleration unit; the remote flue gas concentration and wind speed detection controller 7 can control the acceleration amplitude of the exhaust gas by the acceleration unit.

[0027] Preferably, the air intake unit includes an air intake box 9, a fan 10, a second intelligent regulating air valve 51, and a second motor 16. The second motor 16 controls the wind speed of the fan 10, and the exhaust gas enters the fan 10 from the second intelligent regulating air valve 51 through the air intake box 9; the opening size of the second intelligent regulating air valve 51 can affect the speed at which the exhaust gas enters the air intake unit.

[0028] Preferably, the acceleration unit includes: an air collector 1, a three-flow back-swinging impeller 2, a volute 4, a remote flue gas concentration monitor 3, a first intelligent regulating air valve 5, a wind shield 6, a second motor 16, a rotating shaft 8, a remote flue gas concentration and wind speed detection controller 7, and a first motor 15.

[0029] Preferably, the exhaust gas is discharged from the fan 10 and then enters the wind collector 1, and then is sent into the serrated three-flow swing-back impeller 2 for secondary pressurization of the exhaust gas and then sent into the volute 4. The remote flue gas concentration monitor 3 in the volute 4 can detect the exhaust gas concentration in the space. When the exhaust gas concentration does not meet the standard, the first intelligent regulating air valve 5 can be controlled to allow external air to enter the volute 4 to dilute the exhaust gas concentration in the volute 4. When the exhaust gas concentration does not meet the standard, the second intelligent regulating air valve 51 can be controlled to reduce the entry of exhaust gas to prevent more exhaust gas from entering the volute 4 to further increase the exhaust gas concentration. The diluted exhaust gas that meets the standard is discharged upward through the wind shield 6. A remote flue gas concentration and wind speed detection controller 7 is arranged on the top of the wind shield 6. The remote flue gas concentration and wind speed detection controller 7 can detect the exhaust gas concentration and wind speed inside the wind shield 6. The remote flue gas concentration and wind speed detection controller 7 can detect the atmospheric side wind speed outside the wind shield 6.

[0030] The remote smoke concentration and wind speed detection controller 7 can control the rotation speed of the sawtooth three-dimensional flow backward swing impeller 2 by controlling the second motor 16.

[0031] When the remote smoke concentration and wind speed detection controller 7 detects that the atmospheric side wind speed outside the wind shield 6 is greater than the exhaust gas wind speed inside the wind shield 6, it will increase the speed of the sawtooth three-dimensional flow backward swing impeller 2 by controlling the second motor 16 to increase the speed to further increase the flow rate of the exhaust gas. When the remote smoke concentration and wind speed detection controller 7 detects that the atmospheric side wind speed outside the wind shield 6 is less than the exhaust gas wind speed inside the wind shield 6, the exhaust gas will not be blown back into the wind shield 6 and can be discharged smoothly.

[0032] When the remote smoke concentration and wind speed detection controller 7 detects the concentration of the exhaust gas before the exhaust gas is discharged from the wind shield 6, it finally confirms that the discharged exhaust gas meets the standards.

[0033] The electric energy generated by the waste heat recovery device 11 of the air intake unit and the acceleration unit is connected to an external power supply when this part of the electric energy cannot meet the power demand, thereby realizing efficient use of energy.

[0034] like Figure 4As shown: the effective smoke column lifting height is the exhaust gas required discharge height he. To ensure that the exhaust gas will not be blown back into the wind shield 6 and cause exhaust gas backflow, the exhaust gas reaching this height needs to reach a wind shield outlet speed (fpm) V that is not lower than the atmospheric side wind speed (fpm) U at this height.

[0035] The various elements in the exhaust emission device are shown as follows:

[0036] Required emission height of exhaust gas: he;

[0037] Fan height: hs;

[0038] Lifting height: hr;

[0039] Hood outlet velocity (fpm): V;

[0040] Atmospheric crosswind speed (fpm): U;

[0041] Wind shield 6 outlet diameter (ft): d;

[0042] he = hs + hr;

[0043] he=(3x{Vxd / U})+hs;

[0044] Exhaust gas volume: Qc;

[0045] Amount of dilution air introduced: Qe;

[0046] Total air volume: Qa;

[0047] Qa=Qc+Qs.

[0048] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced by equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An intelligent high-altitude discharge device with waste heat recovery function, comprising: A dust collector (12) and a desulfurization and denitration tower (13), wherein the external exhaust gas enters the desulfurization and denitration tower (13) after passing through the dust collector (12), and is characterized in that it comprises: a waste heat recovery device (11) and a pressurized high-altitude emission tower (14), wherein the pressurized high-altitude emission tower (14) is connected to the desulfurization and denitration tower (13), and the waste heat recovery device (11) comprises: a magnetic suspension turbine expander (25), and the waste heat recovery device (11) is connected to the dust collector (12). After the exhaust gas passes through the waste heat recovery device (11), the internal water is converted into a higher steam pressure to drive the centrifugal worm gear (27) in the internal magnetic suspension turbine expander (25) to rotate, and the rotation of the centrifugal worm gear (27) drives the permanent magnet synchronous motor (21) to generate electricity, and the electricity generated by the permanent magnet synchronous motor (21) is stored in the external energy storage facility for the dust collector (12), the desulfurization and denitration tower (13), and the pressurized high-altitude emission tower (14).

2. According to claim 1, an intelligent high-altitude discharge device with exhaust gas waste heat recovery function is characterized by: The magnetic suspension turbine expander (25) is provided with an air inlet (24) and an air outlet (26). After water vapor enters from the air inlet (24), it drives the centrifugal worm gear (27) to rotate and is blown out from the air outlet (26) into the dust collector (12). A seal (28) is provided between the motor housing (22) of the permanent magnet synchronous motor (21) and the magnetic suspension turbine expander (25). The centrifugal worm gear (27) and the permanent magnet synchronous motor (21) are connected via a turbine shaft (23). A five-degree-of-freedom magnetic suspension bearing (29) is provided between the turbine shaft (23) and the permanent magnet synchronous motor (21).

3. According to claim 1, the intelligent high-altitude discharge device with exhaust gas waste heat recovery function is characterized by: The pressurized high-altitude emission tower (14) comprises: an air intake unit, an acceleration unit, and a remote smoke concentration monitor (3). The air intake unit is connected to the acceleration unit, exhaust gas enters from the air intake unit, and smoke is discharged from the acceleration unit. The acceleration unit is provided with a remote smoke concentration monitor (3) and a remote smoke concentration and wind speed detection controller (7). The remote smoke concentration monitor (3) can control the speed of exhaust gas entering the air intake unit, and the remote smoke concentration monitor (3) can control the amount of external air introduced into the acceleration unit by the acceleration unit; the remote smoke concentration and wind speed detection controller (7) can control the acceleration amplitude of the exhaust gas by the acceleration unit.

4. According to claim 3, an intelligent high-altitude discharge device with exhaust gas waste heat recovery function is characterized in that: The air intake unit comprises an air intake box (9), a fan (10), a second intelligent regulating air valve (51), and a second motor (16); the second motor (16) controls the wind speed of the fan (10); and the exhaust gas enters the fan (10) from the second intelligent regulating air valve (51) through the air intake box (9).

5. According to claim 4, an intelligent high-altitude discharge device with exhaust gas waste heat recovery function is characterized in that: The acceleration unit comprises: an air collector (1), a three-dimensional flow backward swinging impeller (2), a volute (4), a remote smoke concentration monitor (3), a first intelligent regulating air valve (5), a wind shield (6), a second motor (16), a rotating shaft (8), a remote smoke concentration and wind speed detection controller (7), and a first motor (15).

6. The intelligent high-altitude discharge device with exhaust gas waste heat recovery function according to claim 5 is characterized by: The waste gas is discharged from the fan (10) and enters the wind collector (1), and then is sent into the sawtooth three-way flow backward swing impeller (2), where the waste gas is pressurized for a second time and then sent into the volute (4). The remote smoke concentration monitor (3) in the volute (4) can detect the waste gas concentration in the space. If the waste gas concentration does not meet the standard, the first intelligent regulating air valve (5) can be controlled to allow external air to enter the volute (4), and the second intelligent regulating air valve (51) can be controlled to reduce the entry of waste gas. The diluted waste gas that meets the standard is discharged through the wind shield. (6) is discharged upward, and a remote smoke concentration and wind speed detection controller (7) is arranged on the top of the wind shield (6). The remote smoke concentration and wind speed detection controller (7) can detect the exhaust gas concentration and wind speed inside the wind shield (6), and the remote smoke concentration and wind speed detection controller (7) can detect the atmospheric side wind speed outside the wind shield (6). The remote smoke concentration and wind speed detection controller (7) can control the rotation speed of the sawtooth three-dimensional flow backward swinging impeller (2) by controlling the second motor (16).

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