Oxidizing air humidification and temperature reduction device

Abstract

The application provides an oxidizing air humidifying and temperature reducing device, which comprises an oxidizing air input pipeline, a diffuser, a humidifying and temperature reducing device, a speed increaser, an oxidizing air output pipeline and a cooling water atomizing mechanism, the oxidizing air input pipeline, the diffuser, the humidifying and temperature reducing device, the speed increaser and the oxidizing air output pipeline are sequentially connected from top to bottom, the cooling water atomizing mechanism is arranged in the diffuser, and the cooling water atomizing mechanism is arranged above the humidifying and temperature reducing device. The oxidizing air humidifying and temperature reducing device can perform temperature reducing and humidifying treatment on the oxidizing air before entering an absorption tower, and guarantees normal operation of a unit.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of wet desulfurization, in particular to an oxidation air humidifying and temperature reducing device. BACKGROUND

[0002] In a calcium-based wet desulfurization system, oxidation air is often used to oxidize calcium sulfite generated in the reaction into more stable gypsum and promote the absorption of sulfur dioxide. The oxidation air entering the absorption tower is usually provided by a ventilation fan. Because the temperature of the air is increased and the relative humidity is reduced in the compression process, the oxidation air pipeline outlet part in contact with the slurry is prone to scaling and clogging, which affects the normal operation of the unit. SUMMARY

[0003] The application aims to provide an oxidation air humidifying and temperature reducing device which can reduce the temperature and humidify the oxidation air before entering the absorption tower, thereby guaranteeing the normal operation of the unit.

[0004] The application provides an oxidation air humidifying and temperature reducing device, which comprises an oxidation air input pipeline, an expander, a humidifying and temperature reducing device, a speed increaser, an oxidation air output pipeline and a cooling water atomizing mechanism. The oxidation air input pipeline, the expander, the humidifying and temperature reducing device, the speed increaser and the oxidation air output pipeline are sequentially connected from top to bottom. The cooling water atomizing mechanism is arranged in the expander and above the humidifying and temperature reducing device.

[0005] According to the application, the humidifying and temperature reducing device comprises a humidifying and temperature reducing device body shell. A multi-channel mixer is arranged in the middle upper part of the humidifying and temperature reducing device body shell.

[0006] According to the application, a flow uniformizing grid is further arranged in the humidifying and temperature reducing device body shell and at the bottom of the multi-channel mixer.

[0007] According to the application, the cooling water atomizing mechanism comprises a spray gun and a cooling water conveying pipeline. One end of the cooling water conveying pipeline is fixedly connected with the spray gun. The nozzle of the spray gun is arranged towards the multi-channel mixer.

[0008] According to the application, a cooling water input interface is arranged on the side wall of the expander. The other end of the cooling water conveying pipeline is detachably connected with the cooling water input interface.

[0009] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline.

[0010] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline.

[0011] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline.

[0012] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline.

[0013] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline.

[0014] The oxidizing air humidifying and temperature reducing device provided by the application comprises an expander, a humidifying and temperature reducing device, a speed increaser and an oxidizing air output pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and all other drawings obtained by those of ordinary skill in the art without creative effort based on these drawings are within the scope of the present application.

[0016] Fig. 1 Structure diagram of the oxidation air humidification and temperature reduction device of the present application;

[0017] Fig. 2 Structure diagram of the oxidation air humidification and temperature reduction device of the present application;

[0018] Fig. 3 Structure diagram of the flow uniformization grid in the oxidation air humidification and temperature reduction device of the present application.

[0019] Explanation of reference signs:

[0020] 1, oxidation air input pipeline; 11, inlet connecting joint; 2, diffuser; 21, diffuser flange plate; 3, humidification and temperature reduction device; 31, humidification and temperature reduction device body shell; 32, multi-channel flow mixer; 33, flow uniformization grid; 34, humidification and temperature reduction device flange plate; 4, speed increaser; 5, oxidation air output pipeline; 51, outlet connecting joint; 6, cooling water atomization mechanism; 61, spray gun; 62, cooling water delivery pipeline; 63, cooling water input interface; 7, connecting bolt. DETAILED DESCRIPTION

[0021] The technical solutions of the present application will be described below in conjunction with the embodiments, obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0023] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, features defined with "first", "second" or "third" can include one or more of the features implicitly or explicitly. In the description of the application, the meaning of "a plurality of" is two or more, unless explicitly specified otherwise. In addition, the terms "mounting", "connecting", "connection" should be interpreted broadly, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through an intermediate medium, or internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] As shown in Figs. 1 to 3 The oxidation air humidification and temperature reduction device of the embodiment of the present application comprises an oxidation air input pipeline 1, a diffuser 2, a humidification and temperature reduction device 3, a speed increaser 4, an oxidation air output pipeline 5 and a cooling water atomization mechanism 6. The oxidation air input pipeline 1, the diffuser 2, the humidification and temperature reduction device 3, the speed increaser 4 and the oxidation air output pipeline 5 are connected in sequence from top to bottom. The cooling water atomization mechanism 6 is arranged in the diffuser 2, and the cooling water atomization mechanism 6 is arranged above the humidification and temperature reduction device 3. The cooling water atomization mechanism 6 is used for humidifying and reducing the temperature of the high-temperature oxidation air entering the humidification and temperature reduction device 3.

[0025] In operation, the high-temperature oxidation air enters the device from the oxidation air input pipeline 1. After the expansion of the diffuser 2, the flow rate of the oxidation air is reduced, and the static pressure is increased, thereby increasing the upper limit of the vapor pressure of the gas-liquid equilibrium. Then, the high-temperature oxidation air enters the humidification and temperature reduction device 3. Under the spraying action of the cooling water atomization mechanism 6, the hot air contacts with the atomized cooling water mist droplets, and the first-stage humidification and temperature reduction is performed. Then, the hot air enters the multi-channel mixer 32 of the humidification and temperature reduction device 3. Under the action of the multi-channel mixer 32, the hot air and the water droplets that have not completely evaporated are mixed intensively, and the second-stage humidification and temperature reduction of the hot air is completed. Then, the air flow rate is increased, and the static pressure is reduced in the speed increaser 4, so that the water vapor in the wet air is in a supersaturated state, thereby achieving the effect of humidification and temperature reduction. Then, the liquid droplets that have not completely evaporated are discharged through the oxidation air output pipeline 5, and the oxidation air that has been subjected to the humidification and temperature reduction treatment is outputted to the outside through the oxidation air output pipeline 5.

[0026] In use, the oxidation air humidification and temperature reduction device of the embodiment of the present application can be installed at the oxidation air inlet of the absorption tower, so as to provide the humidified and temperature-reduced oxidation air for the absorption tower.

[0027] Therefore, the oxidizing air humidification and temperature reduction device can reduce and humidify the oxidizing air before entering the absorption tower, effectively prevent the oxidizing air pipeline outlet from being blocked by scaling, and ensure normal operation of the unit.

[0028] In some embodiments of the present application, the humidification and temperature reduction device 3 comprises a humidification and temperature reduction device body shell 31, and a multi-channel flow mixer 32 is arranged inside the humidification and temperature reduction device body shell 31 and located at the middle upper part of the humidification and temperature reduction device body shell 31. By arranging the multi-channel flow mixer 32, the oxidizing air after contacting the cooling water mist can enter the multi-channel flow mixer 32 for treatment. Since the multi-channel flow mixer 32 has a plurality of small holes that suddenly change direction, the cooling water droplets that fail to evaporate remain in each small hole after falling into the multi-channel flow mixer 32. Therefore, when the oxidizing air enters the multi-channel flow mixer 32, the impact and stirring effect of the hot air and the cooling water remaining in each small hole can be intensified, the uniformity of gas-liquid mixing is improved, a foam body is formed, the mass transfer rate is accelerated, the high-temperature oxidizing air is further cooled and humidified, and the humidity of the oxidizing air reaches complete saturation.

[0029] In some embodiments of the present application, the humidification and temperature reduction device 3 comprises a humidification and temperature reduction device body shell 31, and a multi-channel flow mixer 32 is arranged inside the humidification and temperature reduction device body shell 31 and located at the middle upper part of the humidification and temperature reduction device body shell 31. By arranging the multi-channel flow mixer 32, the oxidizing air after contacting the cooling water mist can enter the multi-channel flow mixer 32 for treatment. Since the multi-channel flow mixer 32 has a plurality of small holes that suddenly change direction, the cooling water droplets that fail to evaporate remain in each small hole after falling into the multi-channel flow mixer 32. Therefore, when the oxidizing air enters the multi-channel flow mixer 32, the impact and stirring effect of the hot air and the cooling water remaining in each small hole can be intensified, the uniformity of gas-liquid mixing is improved, a foam body is formed, the mass transfer rate is accelerated, the high-temperature oxidizing air is further cooled and humidified, and the humidity of the oxidizing air reaches complete saturation.

[0030] In some embodiments of the present application, the cooling water atomization mechanism 6 comprises a spray gun 61 and a cooling water conveying pipeline 62, one end of the cooling water conveying pipeline 62 is connected and fixed with the spray gun 61, and the nozzle of the spray gun 61 is arranged towards the multi-channel flow mixer 32.

[0031] In some embodiments of the present application, the cooling water atomization mechanism 6 comprises a spray gun 61 and a cooling water conveying pipeline 62, one end of the cooling water conveying pipeline 62 is connected and fixed with the spray gun 61, and the nozzle of the spray gun 61 is arranged towards the multi-channel flow mixer 32.

[0032] In use, the oxidizing air cooling water enters from the cooling water input interface 63, is conveyed to the spray gun 61 through the cooling water conveying pipeline 62, is atomized into fine mist droplets by the nozzle of the spray gun 61, and is mixed with the high-temperature oxidizing air to exchange heat and mass, so that the temperature of the oxidizing air is reduced and the humidity is increased.

[0033] When the cooling water atomizing mechanism 6 is installed, the distance between the nozzle of the spray gun 61 and the multi-channel mixer 32 needs to be set to ensure that the atomized droplets sprayed by the spray gun 61 can completely cover the cross section of the humidifier body shell 31, and at the same time, effectively avoid the droplets from being sprayed onto the inner wall surface of the humidifier body shell 31 to form wall-adhering water flow, thereby improving the utilization rate of the cooling water.

[0034] In some embodiments of the present application, the diffuser 2 adopts a conical structure with a small diameter at the top and a large diameter at the bottom, the small-diameter end of the diffuser 2 is fixedly connected with the lower end of the oxidizing air input pipeline 1, and the large-diameter end of the diffuser 2 is detachably connected with the upper end of the humidifier 3.

[0035] Specifically, the large-diameter end of the diffuser 2 is provided with a diffuser flange plate 21, the upper end of the humidifier 3 is provided with a humidifier flange plate 34, and the diffuser flange plate 21 and the humidifier flange plate 34 are connected through connecting bolts 7, which are used to realize the detachable connection between the diffuser 2 and the humidifier 3, thereby facilitating maintenance and repair.

[0036] Of course, the diffuser 2 and the humidifier 3 can also be detachably connected through buckles or special quick-release joints, as long as they can realize reliable detachable connection between the diffuser 2 and the humidifier 3.

[0037] In some embodiments of the present application, the speed increaser 4 adopts a conical structure with a large diameter at the top and a small diameter at the bottom, the large-diameter end of the speed increaser 4 is fixedly connected with the lower end of the humidifier 3, and the small-diameter end of the speed increaser 4 is fixedly connected with the oxidizing air output pipeline 5.

[0038] In some embodiments of the present application, the oxidizing air input pipeline 1 adopts a bent pipe structure, the upper end of the oxidizing air input pipeline 1 is provided with an inlet connecting joint 11, which is convenient for detachable connection with the ventilation fan, thereby facilitating maintenance and repair.

[0039] In some embodiments of the present application, the oxidizing air output pipeline 5 adopts a bent pipe structure, the lower end of the oxidizing air output pipeline 5 is provided with an outlet connecting joint 51, which is convenient for detachable connection with the oxidizing air input interface of the absorption tower, thereby facilitating maintenance and repair.

[0040] The working principle of the oxidizing air humidifying and desuperheating device according to the embodiments of the present application is as follows:

[0041] The high-temperature oxidizing air enters the diffuser 2 from the upper end of the oxidizing air input pipe 1, and after the expansion of the diffuser 2, the flow rate of the high-temperature oxidizing air is reduced, the static pressure is increased, and the upper limit of the water vapor pressure of the gas-liquid balance is improved; then enters the humidifying and temperature reducing device body shell 31, under the spraying action of the spray gun 61, the high-temperature oxidizing air first contacts the cooling water mist droplets atomized by the nozzle of the spray gun 61, and carries out the first humidifying and temperature reducing. Then enter the multi-channel mixer 32 of the humidifying and temperature reducing device 3, and collide with the cooling water remaining in each small channel of the multi-channel mixer 32 to form a foam body, thereby intensifying the humidifying and temperature reducing effect of the high-temperature oxidizing air, and completing the second humidifying and temperature reducing of the hot air. After the cooling oxidizing air and the flying ash pass through the multi-channel mixer 32, the oxidizing air passes through the flow uniformizing grid 33 after being adjusted, so as to eliminate the circumferential rotational flow of the oxidizing air, prevent the liquid droplets in the oxidizing air from moving radially, and make the oxidizing air dehydrate. Then the oxidizing air enters the speed increaser 4 again, increases the air flow rate, reduces the static pressure, makes the water vapor in the wet air form a supersaturated state, achieves the effect of humidifying and temperature reducing, then the liquid droplets that are not completely evaporated are uniformly discharged through the pipe wall of the oxidizing air output pipe 5, and at the same time, the oxidizing air treated by the humidifying and temperature reducing device is output to the outside through the oxidizing air output pipe 5.

[0042] In summary, the oxidizing air humidifying and temperature reducing device of the embodiment of the present application can carry out the temperature reducing and humidifying treatment on the oxidizing air before entering the absorption tower, effectively prevent the scaling and blocking problem of the part of the oxidizing air pipe outlet in contact with the slurry, and guarantee the normal operation of the unit.

[0043] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An oxidizing air humidification desuperheating device, characterized by, Including oxidation air input pipeline (1), diffuser (2), humidification temperature reducer (3), speed increaser (4), oxidation air output pipeline (5) and cooling water atomization mechanism (6), the oxidation air input pipeline (1), the diffuser (2), the humidification temperature reducer (3), the speed increaser (4) and the oxidation air output pipeline (5) are sequentially connected from top to bottom, the cooling water atomization mechanism (6) is arranged in the diffuser (2), and the cooling water atomization mechanism (6) is arranged above the humidification temperature reducer (3); The diffuser (2) is a conical structure, the small-diameter end of the diffuser (2) is fixedly connected with the lower end of the oxidation air input pipeline (1), and the large-diameter end of the diffuser (2) is detachably connected with the upper end of the humidification temperature reducer (3); The humidification temperature reducer (3) comprises a humidification temperature reducer body shell (31), a multi-channel mixer (32) is arranged in the middle upper part of the humidification temperature reducer body shell (31); A flow uniformizing grid (33) is further arranged in the humidification temperature reducer body shell (31), and the flow uniformizing grid (33) is arranged at the bottom of the multi-channel mixer (32); The cooling water atomization mechanism (6) comprises a spray gun (61) and a cooling water delivery pipeline (62), one end of the cooling water delivery pipeline (62) is fixedly connected with the spray gun (61), and the nozzle of the spray gun (61) is arranged towards the multi-channel mixer (32); The speed increaser (4) is a conical structure, the large-diameter end of the speed increaser (4) is fixedly connected with the lower end of the humidification temperature reducer (3), and the small-diameter end of the speed increaser (4) is fixedly connected with the oxidation air output pipeline (5).

2. The oxidizing air humidification and attemperator device of claim 1, wherein, A cooling water input interface (63) is arranged on the side wall of the diffuser (2), and the other end of the cooling water delivery pipeline (62) is detachably connected with the cooling water input interface (63).

3. The oxidant air humidification and attemperator apparatus of claim 1, wherein, The large-diameter end of the diffuser (2) is provided with a diffuser flange plate (21), the upper end of the humidification temperature reducer (3) is provided with a humidification temperature reducer flange plate (34), and the diffuser flange plate (21) and the humidification temperature reducer flange plate (34) are connected through connecting bolts (7).

4. The oxidant air humidification and attemperator apparatus of claim 1, wherein, The oxidation air input pipeline (1) is a bent pipe structure, and the upper end of the oxidation air input pipeline (1) is provided with an inlet connecting joint (11).

5. The oxidant air humidification and attemperator apparatus of claim 1, wherein, The oxidation air output pipeline (5) is a bent pipe structure, and the lower end of the oxidation air output pipeline (5) is provided with an outlet connecting joint (51).

Images