Flue gas cooling and washing device

Abstract

The invention discloses a flue gas cooling and washing device, and relates to the field of flue gas treatment. The at least two liquid storage mechanisms can be communicated with the bottom of the device body; the upper part of the device body can be communicated with the at least two liquid storage mechanisms through the circulating pipe; the circulating pump is arranged at the bottom of the circulating pipe, the output end of the circulating pump is communicated with the bottom end of the circulating pipe, and the input end of the circulating pump can be communicated with the liquid storage mechanism. The device disclosed by the invention can be used for fully and economically cooling and washing the chlorinated flue gas in a circulating manner.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chlorination flue gas treatment, in particular to a flue gas cooling and washing device. BACKGROUND

[0002] The existing titanium tetrachloride production process produces chlorinated flue gas containing a small amount of carbon monoxide even after treatment. Due to the presence of a large amount of nitrogen and carbon dioxide in the flue gas and the low concentration of carbon monoxide, the heat value of the chlorinated flue gas containing carbon monoxide is very low, ignition is difficult, and combustion performance is poor during flue gas recovery and treatment. Under the national call for green, low-carbon and sustainable development, combined with the high-quality development plan of the enterprise, the comprehensive utilization of boiling chlorinated flue gas is urgent. The comprehensive utilization of boiling chlorinated flue gas not only improves the clean and green level of chlorination production process (reduces air pollution), but also fully burns low-heat-value carbon monoxide, maximizes heat recovery, reduces production costs, and supports high-quality development of enterprises.

[0003] During the chlorinated flue gas treatment process, the chlorinated flue gas needs to be cooled and washed, but the existing cooling and washing device uses multi-stage spraying, which has some dead zones and cannot fully cool and dehumidify the flue gas. Therefore, how to fully and economically cool and wash the chlorinated flue gas is still a problem to be solved. SUMMARY

[0004] In order to fully and economically cool and wash the chlorinated flue gas and solve the pain points of traditional multi-stage spraying, the present application provides an improved flue gas cooling and washing device.

[0005] Therefore, the present application provides a flue gas cooling and washing device, which comprises: a device body; at least two liquid storage mechanisms capable of communicating with the bottom of the device body; a circulating pipe, the upper part of the device body being capable of communicating with the at least two liquid storage mechanisms through the circulating pipe; a circulating pump arranged at the bottom of the circulating pipe, the output end of the circulating pump being in communication with the bottom end of the circulating pipe, and the input end of the circulating pump being capable of communicating with the liquid storage mechanism.

[0006] According to an exemplary embodiment of the present application, the flue gas cooling and washing device further comprises a shunt pipe, each shunt pipe comprising a longitudinal shunt pipe main pipe and at least two shunt pipe branch pipes equal in number to the at least two liquid storage mechanisms, the input end of the circulating pump and the bottom end of the device body being fixed and in communication with the shunt pipe.

[0007] According to an exemplary embodiment of the present application, the bottom end of the shunt pipe is capable of communicating with the storage tank through a shunt pipe electromagnetic valve, and the shunt pipe electromagnetic valve can open or close the communication between the storage tank and the shunt pipe.

[0008] According to the exemplary embodiments of the present application, the flue gas cooling and washing device further comprises a refrigerant system, the at least two liquid storage mechanisms comprise two heat exchangers, and the water medium from the bottom of the device body exchanges heat with the refrigerant from the refrigerant system to achieve cooling.

[0009] According to the exemplary embodiments of the present application, the two heat exchangers are provided with refrigerant solenoid valves and shunt pipe solenoid valves, and when one heat exchanger needs to be repaired or maintained, the refrigerant solenoid valve and the shunt pipe solenoid valve of the heat exchanger are closed.

[0010] According to the exemplary embodiments of the present application, the at least two liquid storage mechanisms comprise two natural heat dissipation liquid storage mechanisms, and the natural heat dissipation liquid storage mechanism comprises a storage box, the shell of the storage box is made of copper, and the water medium falling into the natural heat dissipation liquid storage mechanism from the bottom of the device body is naturally cooled to the environment through the shell to achieve cooling.

[0011] According to the exemplary embodiments of the present application, when one natural heat dissipation liquid storage mechanism stops working or needs to be repaired or maintained, the shunt pipe solenoid valve of the natural heat dissipation liquid storage mechanism is closed.

[0012] According to the exemplary embodiments of the present application, each of the liquid storage mechanisms further comprises a driving mechanism and a stirring mechanism, the stirring mechanism comprises a shaft rod located inside the storage box, at least one stirring rod is fixedly connected to the outer side wall of the shaft rod, the right end of the shaft rod penetrates to the right of the storage box and is fixedly connected with a driven gear, and the driven gear can drive the shaft rod to rotate after engaging with the driving gear of the driving mechanism.

[0013] According to the exemplary embodiments of the present application, the flue gas cooling and washing device further comprises a driving mechanism and a stirring mechanism, the stirring mechanism comprises a driven gear and a shaft rod, and the driving mechanism comprises: an electric push rod, the push rod of which can be extended and retracted; a connecting piece, the front end of the push rod of the electric push rod being fixedly connected with the connecting piece; an L-shaped mounting plate, one side wall of the connecting piece being fixedly connected with the L-shaped mounting plate, a guide rod being slidably connected inside the L-shaped mounting plate, the front end and the rear end of the guide rod being fixedly connected with fixing pieces, the bottom of the fixing pieces being fixedly connected with the upper surface of the storage box; and a motor, the motor being fixedly connected to the inner side of the L-shaped mounting plate, the left end of the output shaft of the motor being fixedly connected with a driving gear, the driving gear being able to drive the shaft rod to rotate after engaging with the driven gear of the stirring mechanism.

[0014] Among them, one of the driving mechanisms is commonly arranged between the two natural heat dissipation liquid storage mechanisms, and the driving mechanism is configured to: after the electric push rod drives the driving gear to engage with one of the two driven gears, the motor is started.

[0015] According to the exemplary embodiment of the present application, the circulation pipe comprises at least one circulation branch pipe, and the inside of the device body is provided with at least one cyclone, and the side wall of the device body above each cyclone is connected with a circulation branch pipe.

[0016] According to the exemplary embodiment of the present application, the flue gas cooling and washing device further comprises a refrigerant system and a flow detector arranged at the flue gas inlet, the at least two liquid storage mechanisms comprise a heat exchanger and at least one natural heat dissipation liquid storage mechanism, when the flow of the flue gas to be treated is the preset flow, the electromagnetic valve on the heat exchanger is opened and the electromagnetic valve on the natural heat dissipation liquid storage mechanism is closed; when the flow of the flue gas to be treated is less than 30% of the preset flow or the refrigerant system is abnormal, the electromagnetic valve on the heat exchanger is closed and the electromagnetic valve on the natural heat dissipation liquid storage mechanism is opened.

[0017] It should be understood that the orientation words such as "upper", "lower", "front", "back", and the shape words such as "rod", "box", and "sheet" used herein are only for the convenience of explaining the present application in conjunction with the drawings, and do not constitute or be used for the limitation of the present application. All the directional indications in the embodiments of the present application are only for explaining the relative position relationship, movement condition, and the like between the components in a certain posture, and if the certain posture is changed, the directional indications are also changed accordingly. In the present application, unless otherwise clearly specified and limited, the terms "communication", "connection", "fixation", and the like should be understood in a broad sense, for example, the "fixation" can be fixed connection, or detachable connection, or integral; can be direct connection, or indirect connection through an intermediate medium; can be the communication or interaction relationship between two elements, unless otherwise clearly specified and limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include at least one of the features. In addition, the technical features of each embodiment can be combined with each other, but it must be based on the realization of those skilled in the art, and when the combination of technical features appears contradictory or unachievable, it should be considered that the combination does not exist, and is also not within the protection scope required by the present application.

[0018] The present application can achieve the following beneficial effects: The device of the present application can sufficiently and economically scrub and cool the chlorinated flue gas. Firstly, the device of the present application can better utilize the natural cooling to cool the cooling medium from the cooling and scrubbing device, thereby saving energy consumption. Secondly, the device of some embodiments of the present application can realize the effect of alternating use of the cooling medium inside the storage tank, avoiding the problem of poor cooling effect caused by temperature rise after long-term use of a single storage tank 801 inside the cooling medium. In addition, unlike the traditional multi-stage spray scrubbing, the cyclone of the device of some embodiments of the present application utilizes the aerodynamic suspended bubble technology reaction mechanism, so that the dynamic liquid film wraps the small flue gas group for cooling and scrubbing, and the cooling efficiency is higher, and the flue gas can pass through the aerodynamic suspended bubble zone formed by the cyclone, and there is almost no dead zone, so that the chlorinated flue gas can be cooled and scrubbed efficiently. In addition, the device of some embodiments of the present application can also achieve the purpose of fire resistance, further improving the safety of the device and the system in which it is located. The cyclone (preferably an emulsion layer cyclone) used in the device of the present application can make the flue gas flow form a rotating flow, and the water entering the inside of the device body through the circulating pump and the circulating pipe also forms a rotating flow, achieving the effect of rotating water seal and achieving the purpose of fire resistance. More specifically, when the device of the present application uses a cyclone (preferably an emulsion layer cyclone) with static rotating vanes, the flue gas flow will undergo strong planar centripetal rotation when passing through the static rotating vanes of the cyclone. The rotating flue gas impacts the liquid in the cyclone into a rotating foam zone, and then lifts up the foam zone, so that the entire rotating foam zone is in a suspended state. The flue gas passes through the foam zone and the rotating downward liquid from bottom to top for sufficient cooling and scrubbing, while the chlorinated flue gas is cooled and scrubbed, and the rotating water seal formed by the cyclone achieves the purpose of effective fire resistance. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure according to an exemplary embodiment of the present application; Figure 2 is a schematic diagram of the overall structure according to another exemplary embodiment of the present application Figure 3 is a schematic diagram of the internal structure of the device body according to an exemplary embodiment of the present application; Figure 4 is a schematic diagram of the internal structure of the heat exchanger according to an exemplary embodiment of the present application; Figure 5 is a schematic diagram of the internal structure of the storage tank according to an exemplary embodiment of the present application; Figure 6 is a schematic diagram of the structure of the driving mechanism according to an exemplary embodiment of the present application; Figure 7 is a schematic diagram of the overall structure according to another exemplary embodiment of the present application; Figure 8is a more specific internal structure schematic diagram of the device body according to the exemplary embodiment of the present application; Figure 9 is a structure schematic diagram of the cyclone according to the exemplary embodiment of the present application; Figure 10 is a cross-sectional structure schematic diagram of the gas equalization chamber according to the exemplary embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the technical scheme of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0021] As shown in Figure 1 and Figure 2 , Figure 3 and Figure 7 , a flue gas cooling and washing device is provided, which comprises a device body 1 and at least two liquid storage mechanisms 8. A flue gas inlet 11 is arranged below the outer side wall of the device body 1, and flue gas such as chlorinated flue gas enters the device body 1 through the flue gas inlet 11 after pretreatment. A flue gas outlet 12 is arranged at the top of the device body 1, and a fan 13 is fixedly installed at the right end of the flue gas outlet 12. The flue gas is sucked out of the flue gas outlet 12 by the fan 13 after being treated by the flue gas cooling and washing device. A gas equalization chamber 2 is arranged inside the device body 1 below, a demisting chamber 3 is arranged inside the device body 1 above, and a cyclone 4 (which can be, for example, an emulsion layer cyclone with static blades) is arranged inside the device body 1 between the gas equalization chamber 2 and the demisting chamber 3. The upper part of the cyclone 4 is connected to the liquid storage mechanism 8 through a circulating pipe 6. The circulating pipe 6 can include one or two or even more transverse circulating branch pipes 5, the left end of the circulating branch pipe 5 is connected to the inside of the device body 1, and the number of circulating branch pipes 5 can correspond to the number of cyclones 4. Each circulating branch pipe 5 is located above the corresponding cyclone 4. The bottom end of the circulating pipe 6 is provided with a circulating pump 7, and the output end of the circulating pump 7 is fixedly connected to the bottom end of the circulating pipe 6.

[0022] The input end of the circulating pump 7 and the bottom end of the device body 1 are fixedly connected to a shunt pipe 10 (specifically a U-shaped shunt pipe). The shunt pipe 10 is connected to the at least two liquid storage mechanisms 8, and each liquid storage mechanism 8 is provided with a water outlet electromagnetic valve / electric valve 2018 and a water inlet electromagnetic valve / electric valve 2019 (shunt pipe electromagnetic valves 2018 and 2019). The liquid storage mechanism 8 comprises a storage tank 801. Each shunt pipe 10 comprises a longitudinal (vertical) shunt pipe main pipe and at least two shunt pipe branch pipes equal to the number of the at least two liquid storage mechanisms. Each shunt pipe branch pipe is connected to the corresponding storage tank 801, and the water outlet electromagnetic valve / electric valve 2018 and the water inlet electromagnetic valve / electric valve 2019 control whether the corresponding storage tank 801 is connected to the shunt pipe 10.

[0023] In use, flue gas enters the device body 1 through the flue gas inlet 11, is uniformly distributed to the middle part of the device body 1 through the air equalizing chamber 2, and is then extracted by the fan 13 after passing through the cyclone 4 and the mist eliminator 3, and is discharged from the flue gas outlet 12; the circulating pump 7 extracts the cooling medium from the lower liquid storage mechanism 8 and enters the device body 1 through the left end of the circulating branch pipe 5, and the cooling medium from top to bottom cools and washes the flue gas from bottom to top, and then falls into the liquid storage mechanism 8 through the shunt pipe 10 at the bottom of the device body 1.

[0024] According to an exemplary embodiment of the present application, with reference to Figure 1 and Figure 4 , the flue gas cooling and washing device further comprises a refrigerated brine system 16 and a refrigerated brine circulating pump 15, and the at least two liquid storage mechanisms 8 are heat exchangers for exchanging heat between the water medium from the bottom of the cooling and washing device body and the refrigerated brine from the refrigerated brine system (refrigerant system) 16 to achieve cooling (for example, from 40 degrees Celsius to about 20 degrees Celsius, and correspondingly, the refrigerated brine can be raised from 0 degrees Celsius to about 20 degrees Celsius), and the water medium is then circulated into the cooling and washing device body 1. The structure of the heat exchanger can be any one of a floating head heat exchanger, a tube heat exchanger, a plate heat exchanger, etc., as shown in Figure 4 . The refrigerated brine is pumped into the heat exchanger 8 by the refrigerated brine circulating pump 15 and then returns to the refrigerated brine system 16 through the pipeline. Each liquid storage mechanism 8 is provided with a refrigerated brine inlet pipe and a refrigerated brine outlet pipe connected to the refrigerated brine system 16. An electromagnetic valve / electric valve 17 can be provided on each of the refrigerated brine inlet pipe and the refrigerated brine outlet pipe, or only one electromagnetic valve / electric valve 17 is provided on one of the pipes. Taking the case of two liquid storage mechanisms 8 as an example, there are two refrigerated brine inlet pipes and two refrigerated brine outlet pipes, and a total of four electromagnetic valves / electric valves 17 can be provided on the pipes. Small flow uses an electromagnetic valve, and large flow uses an electric valve. For the sake of convenience, the electromagnetic valve / electric valve is indicated as an electromagnetic valve in the claims.

[0025] According to another exemplary embodiment of the present application, as shown in Figure 2 , Figure 5 and Figure 6 , the at least two liquid storage mechanisms 8 are liquid storage mechanisms that can naturally dissipate heat (without the need for external energy to pump refrigerant for heat exchange, but only through heat exchange with the environment), and the flue gas cooling and washing device no longer includes a refrigerated brine system. Since the flue gas contains carbon monoxide and a small amount of toxic substances such as chlorine, sulfur dioxide, and titanium tetrachloride, the liquid storage tank is preferably of a closed structure and is preferably made of copper. The water medium from the bottom of the cooling and washing device body falls into the liquid storage mechanism 8, is naturally cooled by the copper shell to the environment, and is then pumped into the cooling and washing device body 201.

[0026] It is preferred to use a stirring structure to accelerate natural heat dissipation. Figure 5 As shown, the interior of the storage box 801 is rotatably connected to a shaft 802 via a rotating shaft. Multiple stirring rods 803 are fixedly connected to the outer wall of the shaft 802. The right end of the shaft 802 extends to the right side of the storage box 801 and is fixedly connected to a driven gear 804. To prevent liquid leakage from the storage box, a mechanical seal structure can be adopted at the right end of the shaft 802, such as an end face seal structure composed of parts such as a static ring and a dynamic ring. A branch pipe of the shunt pipe is fixedly connected to a liquid extraction pipe 807 through a docking hole on the storage box 801. The bottom of the liquid extraction pipe 807 is close to the bottom inner surface of the storage box 801, but with sufficient clearance for liquid extraction. The liquid extraction pipe 807 is behind the shaft 802, and the two do not touch each other.

[0027] like Figure 2 and Figure 6 As shown, a drive mechanism 9 is provided between the two liquid storage mechanisms 8. The drive mechanism 9 includes an electric push rod 901. A connecting piece 902 is fixedly connected to the front end of the output end of the electric push rod 901. An L-shaped mounting plate 903 is fixedly connected to the outer wall of the connecting piece 902. A motor 904 is fixedly connected to the inner side of the L-shaped mounting plate 903. A driving tooth 905 is fixedly connected to the left end of the output shaft of the motor 904. The outer wall of the driving tooth 905 is connected to the driven tooth 804 located in front of or behind the L-shaped mounting plate 903 (see FIG. 1 ). Figure 5 ) engages with the outer wall of the storage box 801. A guide rod 907 is slidably connected to the interior of the L-shaped mounting plate 903. Two fixing plates 908 are fixedly connected to the front and rear ends of the guide rod 907. The bottom of the fixing plates 908 is fixedly connected to the upper surface of the storage box 801. Preferably, each fixing plate 908 is connected to one storage box 801.

[0028] Since the front end of the output end of the electric push rod 901 is fixed with the connecting piece 902, by controlling the extension or contraction of the electric push rod 901, the driving tooth 905 is engaged with one of the two driven teeth 804, and after engagement, the motor 904 is started, so that the corresponding shaft rod 802 inside the storage box 801 can be driven to rotate, so as to control the stirring rod 803 to stir the water medium, and accelerate the cooling effect. After engagement, the motor is started again in order to reduce the impact load on the gear. The output power of the motor 904 is preferably set to make the shaft rod 802 and the stirring rod 803 on it rotate slowly by the driving tooth 905 and the driven tooth 804, preferably 15 rpm-60 rpm. The storage box 801 is preferably made of metal (for example, copper) with good heat dissipation effect. At the same time, under the control of the control module, when the driving tooth 905 is engaged with the driven tooth 804 of one storage box 801, the water outlet electromagnetic valve / electric valve 2018 and the water inlet electromagnetic valve / electric valve 2019 on the storage box 801 are opened, so as to communicate with the shunt pipe 10, while the water outlet electromagnetic valve / electric valve 2018 and the water inlet electromagnetic valve / electric valve 2019 on the other storage box 801 are closed. When the use of the one storage box 801 reaches a predetermined time (for example, 10 minutes), the water outlet electromagnetic valve / electric valve 2018 and the water inlet electromagnetic valve / electric valve 2019 on the other storage box 801 can be opened at this time, so that the two storage boxes 801 can be used alternately. This way, the water medium inside the two storage boxes 801 can be used alternately by controlling the extension or contraction of the electric push rod 901, avoiding the problem of poor cooling effect caused by the temperature rise of the water medium inside the single storage box 801 after long-term use.

[0029] Since the example embodiment adopts multiple storage boxes 801, the water medium from the cooling and washing device can be better cooled by natural cooling (low-speed rotation of the motor 904, low power consumption), thereby saving energy consumption. The example embodiment is suitable for production lines with low flue gas flow.

[0030] According to still another example embodiment of the present application, as Figure 7As shown, one of the at least two liquid storage mechanisms 8 utilizes a naturally cooling liquid storage tank, while the other utilizes a heat exchanger. The chilled brine system 16 is connected only to the heat exchanger and not to the naturally cooling liquid storage tank. A flow meter (not shown, but installed at the flue gas inlet 11) is also provided in the chlorinated flue gas pipeline. When the flow rate of the titanium tetrachloride flue gas to be treated reaches a normal flow rate (approximately 6,000 cubic meters per hour), the solenoid valve / electric valve (2018, 2019) on the heat exchanger is opened, while the solenoid valve / electric valve (2018, 2019) on the naturally cooling liquid storage tank is closed. Water from the bottom of the cooling and washing device body falls into the heat exchanger, is cooled by the chilled brine, and is then pumped into the device body 1. When the flow rate of the titanium tetrachloride flue gas to be treated is less than 30% of the normal flow rate, or the frozen brine system has an abnormality (the frozen brine allocated from the titanium tetrachloride main production system is insufficient, the frozen brine system fails, etc.), the solenoid valves (2018, 2019) on the heat exchanger are closed and the solenoid valves (2018, 2019) on the natural heat dissipation storage tank are opened, and the water medium from the bottom of the cooling and washing device body falls into the natural heat dissipation storage tank, and is pumped into the device body 1 after being cooled by natural heat dissipation.

[0031] Figure 8 The device body 1 is shown in more detail, with the demister chamber 3 including a wire mesh demister and a buffer screen 14 positioned above the cyclone 4. The wire mesh demister is constructed from multiple layers of wire mesh, trapping mist droplets as they pass through it. Buffer screen 14 is angled toward the inlet of the circulation branch pipe 5, providing a buffering effect on the drawn-in aqueous medium and preventing it from impacting the inner wall of the device body 1. Figure 8 Only one buffer mesh plate 14 and one circulation branch pipe 5 are shown; in another embodiment (not shown in the figure), there may be two buffer mesh plates 14 and two circulation branch pipes 5, each buffer mesh plate 14 is located above each cyclone 4; in yet another embodiment (not shown in the figure), there may be only one buffer mesh plate 14 and two circulation branch pipes 5, each circulation branch pipe 5 is located on the side wall of the device body 1 above each cyclone 4. Figure 9 As shown, the cyclone 4 of the cooling washing device is a modular structure, comprising a sleeve 401 and a plurality of obliquely placed static rotor blades 402 placed inside the sleeve 401. Figure 10As shown, the inner part of the equalizing chamber 2 comprises a conical guide plate 201, the lower surface of the equalizing chamber is provided with a through equalizing chamber through groove 202, and the inner lower surface of the equalizing chamber 2 is integrally formed with a guide slope surface 203. A plurality of conical guide plates 201 are sequentially fixed and connected in the inner part of the equalizing chamber 2 from top to bottom, and the number of conical guide plates 201 decreases sequentially from top to bottom. After the entering flue gas enters the inner part of the equalizing chamber 2 through the equalizing chamber through groove 202, it is guided by the multiple layers of conical guide plates 201 and can enter the inner part of the device body 1 uniformly. The setting of the guide slope surface 203 facilitates the circulation and falling of the liquid to be discharged from the inner part of the equalizing chamber 2.

[0032] The present application is not limited to only including two liquid storage mechanisms 8, but also can include three or more than three liquid storage mechanisms 8.

[0033] As shown in Figure 8 and Figure 9 , the present application utilizes the reaction mechanism of the pneumatic suspension bubble technology, and the cyclone 4 is composed of multiple groups of modular static spiral leaves 402, the static spiral leaves 402 are arranged in a circular tubular container in the device body 1 (as shown in Figure 9 ), and when the flue gas flow passes through the static spiral leaves of the cyclone 4, it will occur strong planar centripetal rotation, the accelerated flue gas enters the container at a certain angle from the lower end of the container, collides with the unstable cooling liquid (water medium) flowing from the upper end of the container, the flue gas high-speed rotary cuts the flowing cooling liquid, the cooling liquid is cut into pieces, the gas-liquid continuously collides and cuts, the liquid particles are crushed more and more thin, the gas and liquid are fully mixed, and a layer of stable reaction liquid (emulsion) is formed. In the process of continuous flue gas flow, the reaction liquid layer gradually thickens, and when the upward pneumatic supporting force is balanced with the gravity of the emulsion (the flue gas supports the foam area), the earliest formed reaction liquid will be replaced by the newly formed reaction liquid, so that a relatively stable emulsion layer is always maintained (the entire rotating foam area is in a suspended state to form a pneumatic suspension bubble area), and finally a continuous, stable and efficient flue gas washing model is formed. The flue gas passes through the foam area (emulsion layer) and the rotating downward liquid from bottom to top for full cooling and washing.

[0034] In the module reaction space of the pneumatic suspension bubble generation mechanism, as long as there is enough flue gas flow, a relatively stable reaction liquid layer (emulsion layer) will always be maintained. The flue gas passes through the foam area and the rotating downward cooling water from bottom to top for full mixing and cooling. Unlike the traditional multi-stage spraying, the reaction mechanism of the pneumatic suspension bubble technology is a dynamic liquid film wrapping small flue gas group reaction, and the cooling efficiency is higher. The flue gas passes through the pneumatic suspension bubble device, and the gas-liquid in the reaction liquid layer is in high-speed rotary cutting collision, almost without dead zone, so that the flue gas can be efficiently cooled and washed.

[0035] Because the pneumatic suspension bubble generation mechanism is strong mass transfer cooling, for the same amount of flue gas and the same temperature of flue gas, the liquid-gas ratio is 1 / 2 of the existing empty tower spraying.

[0036] In addition, due to the small dead zone, the vortex water seal formed by the vortex flow device can achieve the purpose of effective fire resistance.

[0037] The above-described embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A flue gas cooling and scrubbing device, comprising: Device body (1); At least two liquid storage mechanisms (8) capable of communicating with the bottom of the device body (1); A circulation pipe (6), wherein the upper portion of the device body (1) is connected to the at least two liquid storage mechanisms (8) via the circulation pipe (6); A circulation pump (7) is arranged at the bottom of the circulation pipe (6), the output end of the circulation pump (7) is connected to the bottom end of the circulation pipe (6), and the input end of the circulation pump (7) can be connected to the liquid storage mechanism (8).

2. The flue gas cooling and scrubbing device according to claim 1, wherein: The flue gas cooling and scrubbing device further comprises a diversion pipe (10), each diversion pipe (10) comprising a longitudinal diversion pipe main pipe and at least two diversion pipe branches, the number of which is equal to the number of the at least two liquid storage mechanisms (8), and the input end of the circulation pump (7) and the bottom end of the device body (1) are both fixed to and communicated with the diversion pipe (10).

3. The flue gas cooling and scrubbing device according to claim 2, wherein: The bottom end of the shunt pipe (10) can be connected to the storage box (801) through a shunt pipe solenoid valve, and the shunt pipe solenoid valve can open or close the storage box (801) and the shunt pipe (10).

4. The flue gas cooling and scrubbing device according to claim 2, wherein: The flue gas cooling and scrubbing device further comprises a refrigerant system (16), and the at least two liquid storage mechanisms (8) comprise two heat exchangers (8), wherein the water medium from the bottom of the device body (1) and the refrigerant from the refrigerant system (16) perform heat exchange to achieve cooling.

5. The flue gas cooling and scrubbing device according to claim 4, wherein: The two heat exchangers (8) are provided with refrigerant solenoid valves. When one heat exchanger needs to be repaired, replaced or maintained, the refrigerant solenoid valve and the shunt pipe solenoid valve on the heat exchanger are closed.

6. The flue gas cooling and scrubbing device according to claim 2, wherein: The at least two liquid storage mechanisms (8) include two natural heat dissipation liquid storage mechanisms (8), the natural heat dissipation liquid storage mechanisms (8) including a storage box (801), the shell of the storage box (801) being made of copper, and the water medium falling from the bottom of the device body (1) into the natural heat dissipation liquid storage mechanism (8) is naturally dissipated to the environment through the shell to achieve cooling.

7. The flue gas cooling and scrubbing device according to claim 6, wherein: When a natural heat dissipation liquid storage mechanism (8) stops working or needs to be repaired, replaced or maintained, the shunt pipe solenoid valve on the natural heat dissipation liquid storage mechanism (8) is closed.

8. The flue gas cooling and scrubbing device according to claim 6, wherein: Each of the liquid storage mechanisms (8) further comprises a driving mechanism (9) and a stirring mechanism, wherein the stirring mechanism comprises a shaft (802) located inside the storage box (801), at least one stirring rod (803) being fixedly connected to the outer wall of the shaft (802), the right end of the shaft (802) extending through the right side of the storage box (801) and being fixedly connected to a driven tooth (804), and the driven tooth (804) being able to drive the shaft (802) to rotate after being engaged with the driving tooth (905) of the driving mechanism (9).

9. The flue gas cooling and scrubbing device according to claim 6, wherein: The flue gas cooling and scrubbing device further comprises a driving mechanism (9) and a stirring mechanism, wherein the stirring mechanism comprises driven teeth (804) and a shaft (802), and the driving mechanism (9) comprises: An electric push rod (901) capable of extending and retracting; A connecting piece (902), to which the front end of the push rod of the electric push rod (901) is fixedly connected; An L-shaped mounting plate (903) is fixedly connected to a side wall of the connecting plate (902); a guide rod (907) is slidably connected to the interior of the L-shaped mounting plate (903); a fixing plate (908) is fixedly connected to the front and rear ends of the guide rod (907); and the bottom of the fixing plate (908) is fixedly connected to the upper surface of the storage box (801); A motor (904) is fixedly connected to the inner side of the L-shaped mounting plate (903), and a driving tooth (905) is fixedly connected to the left end of the output shaft of the motor (904). The driving tooth (905) can drive the shaft (802) to rotate after being engaged with the driven tooth (804) of the stirring mechanism.

10. The flue gas cooling and scrubbing device according to claim 9, wherein: A driving mechanism (9) is commonly provided between the two natural heat dissipation liquid storage mechanisms (8), and the driving mechanism (9) is configured to start the motor (904) after the electric push rod (901) drives the driving tooth (905) to engage with one of the two driven teeth (804).

11. The flue gas cooling and scrubbing device according to claim 1, wherein: The circulation pipe (6) includes at least one circulation branch pipe (5), at least one cyclone (4) is provided inside the device body (1), and a circulation branch pipe (5) is connected to the side wall of the device body (1) above each cyclone (4).

12. The flue gas cooling and scrubbing device according to claim 2, wherein: The flue gas cooling and washing device further comprises a refrigerant system (16) and a flow detector arranged at the flue gas inlet (11); the at least two liquid storage mechanisms (8) comprise a heat exchanger (8) and at least one natural heat dissipation liquid storage mechanism (8); When the flow rate of the flue gas to be treated is a preset flow rate, the solenoid valve (2018, 2019) on the heat exchanger is opened and the solenoid valve (2018, 2019) on the natural heat dissipation liquid storage mechanism is closed; when the flow rate of the flue gas to be treated is less than 30% of the preset flow rate or an abnormality occurs in the refrigerant system (16), the solenoid valve (2018, 2019) on the heat exchanger is closed and the solenoid valve (2018, 2019) on the natural heat dissipation liquid storage mechanism is opened.

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