Deoxidizing device

Abstract

The invention discloses a deoxidizing device, which relates to the field of flue gas treatment, and comprises: a gas inlet pipe through which flue gas to be treated enters the deoxidizing device; the air inlet pipe is fixedly connected to the front surface of the first collecting pipe; the front ends of the two branch flow pipes in the at least two branch flow pipes are jointly and fixedly connected to a first collecting pipe; the front surface of each gas uniformizing box is fixedly communicated with each branch pipe; the at least two deoxidizing device bodies are used for storing a catalyst and / or an adsorbent, and each gas equalizing box is embedded in the front part of each deoxidizing device body; the at least two exhaust branch pipes are arranged behind the deoxidizing device body; the rear ends of the at least two exhaust branch pipes are jointly and fixedly connected to the second collecting pipe; the exhaust main pipe is arranged on the rear surface of the second collecting pipe, and the flue gas is exhausted out of the deoxidizing device through the exhaust main pipe. The device can improve the deoxidizing effect and reduce air resistance, and is easy to maintain.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chlorination flue gas treatment, in particular to an oxygen removal device that can operate in a low-temperature environment. BACKGROUND

[0002] The chlorination flue gas generated in the existing titanium tetrachloride production process still contains a small amount of carbon monoxide even after treatment. Due to the large amount of nitrogen and carbon dioxide in the flue gas and the low concentration of carbon monoxide, the chlorination flue gas containing carbon monoxide has low heat value, is difficult to ignite, and has poor combustion performance. Under the requirement of the national green low-carbon sustainable development, combined with the high-quality development plan of the enterprise, the resource comprehensive utilization of the boiling chlorination flue gas is urgent. The comprehensive utilization of the boiling chlorination flue gas not only can improve the clean and green level of the chlorination method production process (reduce the pollution to the atmosphere), but also can fully burn the low-heat-value carbon monoxide, maximize the heat recovery, reduce the production cost of the enterprise, and support the high-quality development of the enterprise.

[0003] Even if special means can be used to burn the flue gas, once the flue gas backfire explosion occurs in the pipeline, it will seriously endanger the safety of the flue gas treatment system and even the titanium tetrachloride main production system, causing serious economic losses and personal injuries. SUMMARY

[0004] The purpose of the present application is to provide an oxygen removal device that avoids the problem of backfire explosion in the pipeline endangering safety.

[0005] As a further purpose of the application, the device is not easily damaged even in long-term operation. As a further purpose, the oxygen removal device provided by the present application can ensure that the gas uniformly enters the inside of the oxygen removal device and that the oxygen in the flue gas can be fully removed. As a further purpose, the oxygen removal device provided by the present application can reduce air resistance.

[0006] Thus, the application provides an oxygen removal device, comprising: an air inlet pipe 5, through which flue gas to be treated enters the oxygen removal device; a first collecting pipe 4, to which the air inlet pipe 5 is fixedly connected to the front surface; at least two branch pipes 3, the front ends of two branch pipes 3 in the at least two branch pipes 3 are fixedly connected to a first collecting pipe 4; at least two gas equalization boxes 2, the front surface of each gas equalization box 2 is fixedly connected to each branch pipe 3; at least two oxygen removal device bodies 1 for storing catalyst and / or adsorbent, each gas equalization box 2 is embedded in the front of each oxygen removal device body 1; at least two exhaust branch pipes 6 arranged behind the oxygen removal device body 1; a second collecting pipe 7, to which the rear ends of the at least two exhaust branch pipes 6 are fixedly connected; an exhaust main pipe 8, provided on the rear surface of the second collecting pipe 7, through which flue gas is discharged from the oxygen removal device.

[0007] According to the exemplary embodiments of the application, when the number of the at least two oxygen removal device bodies 1 is an odd number greater than three, the number of the first collecting pipes 4 is more than two, one of the two branch pipes 3 connected to the most upstream first collecting pipe 4 is connected to a gas equalization box 2, and the other of the two branch pipes 3 connected to the most upstream first collecting pipe 4 is connected to a first collecting pipe 4 of the next stage; when the number of the at least two oxygen removal device bodies 1 is an even number greater than three, the number of the first collecting pipes 4 is more than two, and the two branch pipes 3 connected to the most upstream first collecting pipe 4 are respectively connected to a first collecting pipe 4 of the next stage.

[0008] According to the exemplary embodiments of the application, the first collecting pipe 4 is internally provided with a cylindrical cavity 27, the cylindrical cavity 27 internally contains a sealing column 28 and a cylinder 29 before and after the sealing column 28, the sealing column 28 and the cylinder 29 before and after the sealing column 28 are rotatable relative to the air inlet pipe 5, the sealing column 28 and the cylinder 29 on the upstream side of the sealing column 28 are internally provided with an axial cavity to communicate with the inside of the air inlet pipe 5, the outer side wall of the sealing column 28 is provided with a butt joint hole 31, the butt joint hole 31 communicates with the axial cavity, two communication cavities 30 are arranged on both sides of a sealing column 28, the butt joint hole 31 can communicate with one of the two communication cavities 30, and the two communication cavities 30 are respectively connected to the inside of two branch pipes 3 away from the cylindrical cavity 27.

[0009] According to the exemplary embodiments of the present application, the oxygen removal device further comprises a mounting plate 20 fixed on the body of the oxygen removal device and a first motor 21 fixed on the mounting plate, a cylinder 29 behind the sealing column 28 penetrates the rear wall of the first collecting pipe 4 and is fixedly connected with the output shaft of the first motor 21, and the first motor 21 can drive the cylinder 29 and the sealing column 28 to rotate, so that the docking hole 31 can be aligned with one of the two communication cavities 30.

[0010] According to the exemplary embodiments of the present application, the cylinder 29 of the oxygen removal device is integrally formed or fixedly connected with a rotating hammer 24, when the rotating hammer 24 swings left and right to a specific position, the switch 25 at the specific position can be turned on, so that the corresponding second driving source is connected to the power supply, and the moving plate 39 in the equalizing tank 2 on the corresponding side reciprocates up and down.

[0011] According to the exemplary embodiments of the present application, the second driving source is a second motor, the second motor 17 drives the cam 18 to reciprocate, the cam 18 drives the pressure receiving bar 19 to reciprocate up and down, and the pressure receiving bar 19 drives the moving plate 39 to reciprocate up and down; or the second driving source is an electric push rod 17, the output end of the electric push rod is directly or indirectly fixedly connected with the moving plate 39, and the output end of the electric push rod drives the moving plate 39 to reciprocate up and down.

[0012] According to the exemplary embodiments of the present application, the equalizing tank 2 is provided with an inlet cavity 41 and a lifting block cavity 43, the moving plate 39 can reciprocate up and down in the inlet cavity 41, and the lifting block 35 can reciprocate up and down in the lifting block cavity 43.

[0013] According to the exemplary embodiments of the present application, the inlet cavity 41 comprises a gas collecting cavity at the front and a moving plate cavity 410 at the rear, the height of the moving plate cavity 410 is greater than that of the gas collecting cavity, and the moving plate 39 can reciprocate up and down in the moving plate cavity 410.

[0014] According to the exemplary embodiments of the present application, the pressure receiving bar 19 is located on the side of the equalizing box 2, the width of the moving plate 39 is set close to the width of the moving plate cavity 410, the thickness of the moving plate 39 is set close to the thickness of the moving plate cavity 410, the moving plate 39 is in clearance fit with the moving plate cavity 410 in the width and thickness directions, a sealing ring is used to seal between them, the position of the sealing ring is lower than the position of the connecting area of the lifting block 35 and the moving plate 39, the thickness of the lifting block 35 is set close to the thickness of the lifting block cavity 43, the thickness of the moving plate 39 is set greater than the thickness of the lifting block cavity 43, the height of the lifting block cavity 43 is equal to the maximum distance that the moving plate 39 can move up and down in the moving plate cavity 410, the height of the moving plate 39 is set less than the height of the moving plate cavity 410 but greater than the height of the lifting block cavity 43, and no matter the moving plate 39 moves to which height position in the moving plate cavity 410, the side wall of the moving plate 39 can always block the lifting block cavity 43.

[0015] According to the exemplary embodiments of the present application, the pressure receiving bar 19 is located on the side of the equalizing box 2, the equalizing box 2 further embeds the lifting seat 32, the lifting seat 32 is fixed relative to the equalizing box 2, the front surface of the lifting seat 32 is provided with the lifting block cavity 43, the inside of the lifting block cavity 43 is fixedly connected with the lifting rod 34, the outside of the lifting rod 34 is sleeved with the lifting block 35, the open front side of the lifting block cavity 43 faces the pressure receiving bar 19, the rear wall of the lifting seat 32 closes the inlet cavity 41 so that the inlet cavity 41 becomes a completely sealed cavity, the rear wall of the lifting seat 32 is between the inlet cavity 41 and the lifting block cavity 43, the materials for making the lifting block 35 and the moving plate 39 include ferromagnetic materials, magnets and / or magnetite, the moving plate 39 further includes non-magnetic materials, and the lifting block 35 can attract the moving plate 39 through the magnetic force through the rear wall of the lifting seat 32.

[0016] According to the exemplary embodiments of the present application, the spring 36 is sleeved on the outside of the lifting rod 34, the upper end of the spring 36 is fixedly connected with the lower part of the lifting block 35, the lower end of the spring 36 is fixedly connected with the bottom of the lifting block cavity 43, and the spring 36 is in a stretched state in the working state to ensure that the pressure receiving bar 19 can move downward when the convex end of the cam 18 rotates downward.

[0017] According to the exemplary embodiments of the present application, in the case that the second driving source is the second motor 17, the second motor 17, the cam 18 and the pressure receiving bar 19 are located on the top of the equalizing box 2, the top end of the moving plate 39 is fixedly connected with the lower end of the pressure receiving bar 19, and the upper part of the equalizing box 2 is provided with a cylindrical hole for the vertical part of the pressure receiving bar 19 to move up and down; in the case that the second driving source is the electric push rod 17, the electric push rod 17 is located on the top of the equalizing box 2, the top end of the moving plate 39 is fixedly connected with the push rod of the electric push rod, and the upper part of the equalizing box 2 is provided with a cylindrical hole for the push rod of the electric push rod to move up and down.

[0018] According to the exemplary embodiments of the present application, the rear surface of the equalizing box 2 is provided with a plurality of through grooves 40, each of the oxygen removal device bodies 1 has a plurality of layers of compartments, each of the grooves 40 is communicated with each layer of the compartments of the oxygen removal device body 1, the width of each of the grooves 40 gradually increases from the upstream side to the downstream side, the pitch of each of the grooves 40 along the height direction gradually increases from the upstream side to the downstream side, and the height of each of the grooves 40 gradually increases from the upstream side to the downstream side.

[0019] According to the exemplary embodiments of the present application, the cross-sectional area of the middle groove 40 is smaller than that of the two side grooves 40.

[0020] According to the exemplary embodiments of the present application, the exhaust branch pipe 6 is fixedly installed with a one-way exhaust valve 14 between the oxygen removal device body 1.

[0021] According to the exemplary embodiments of the present application, the oxygen removal device further comprises a controller, the controller controls the first motor 21 to turn on the power supply of the second driving source 17 on the corresponding oxygen removal device body 1 when the docking hole 31 is aligned with one of the two communication cavities 30, and to make the moving plate 39 in the corresponding oxygen removal device body 1 reciprocate up and down.

[0022] It should be understood that the orientation words used herein, such as "upper", "lower", "front", "back", etc., and the shape words, such as "rod", "box" and "cylinder", are only used for the convenience of explaining the present application in conjunction with the drawings, and do not constitute or be used to limit the present application. All the directional indications in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly. In the present application, unless otherwise clearly specified and limited, the terms "communication", "connection", "fixation", etc. should be understood in a broad sense, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements, or interaction relationship between two elements, unless otherwise clearly 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 descriptions such as "first", "second", etc. in the present application are 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 contradicts each other or cannot be realized, it should be considered that such combination does not exist, and is also not within the protection scope required by the present application.

[0023] In the present application, the oxygen removal device can remove oxygen by adsorption of the adsorbent placed inside or catalytic oxidation reaction of the catalyst placed inside (i.e. catalytic oxygen removal). The catalytic oxygen removal device using catalyst to catalyze oxidation reaction at low temperature (i.e. temperature lower than normal reaction temperature, for example 100 to 300 degrees Celsius) is preferred. The adsorption oxygen removal directly uses some porous adsorbent to adsorb oxygen. For example, porous adsorbent such as tetracyanoquinodimethane (TCNQ) can be used, since this material only reacts with the electrons of oxygen in the air, only oxygen molecules can be adsorbed into the material through the small pores of the material, so that the oxygen in the air can be easily separated. Of course, other materials that can reduce the oxygen content can also be selected. The cost of adsorption oxygen removal is higher than that of catalytic oxygen removal. The catalytic oxygen removal preferably uses honeycomb-shaped ceramic as the carrier (preferably honeycomb-shaped cordierite), and then coats the noble metal (preferably platinum) as the active component of the catalyst, and the amount of noble metal is controlled to enable carbon monoxide to react with oxygen at a lower temperature (for example, one hundred to three hundred degrees Celsius) lower than the ignition point of carbon monoxide (normal concentration of carbon monoxide at normal pressure is about 650 degrees Celsius), so as to consume oxygen in the form of flameless combustion. Since it is flameless combustion, it will not cause backfire explosion.

[0024] The oxygen removal device can achieve the following beneficial effects: The oxygen removal device can operate stably for a long time and is not prone to damage. The oxygen removal device has multiple device bodies, which can be used individually or in batches, facilitating internal adjustment of other device bodies, thereby ensuring long-term stable operation of the oxygen removal device. Taking two device bodies as an example, the gas is introduced through the gas inlet pipe and the two branch pipes on the first collecting pipe, and the gas is introduced into the two device bodies for oxygen removal. The motor controls the rotation of the sealing column, so that the docking hole is connected with one of the two communication cavities, and the gas introduced through the gas inlet pipe is introduced into one device body, so that the two device bodies can be used individually, and the other device body can be adjusted internally.

[0025] In addition, the oxygen removal device can make the gas enter the device body more uniformly, thereby improving the oxygen removal effect. Taking two device bodies as an example, the gas entering the gas equalization tank is distributed to each part of the device body through the multiple through-slots and the moving plate moving up and down, so that the gas can be uniformly distributed in the device body and fully contact with the adsorbent or catalyst at each part, which is more conducive to oxygen removal, and the flue gas flow can also be controlled.

[0026] Compared with the structure of the internal serpentine arrangement, the oxygen removal device according to the example embodiment of the present application can significantly reduce the gas resistance, thereby significantly reducing the power consumption of the booster fan. The power of the motor / electric push rod on the oxygen removal device is very small, and the power consumption of the entire system is reduced. Moreover, the multi-layer drawer type compartment of the oxygen removal device can very conveniently and quickly replace the adsorbent or catalyst by pulling out the partition plate, greatly reducing the difficulty of system maintenance. In addition, the unique structure of the oxygen removal device can achieve precise control of each action. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a block diagram of a flue gas treatment system according to an example embodiment of the present application; Figure 2 is a schematic diagram of the overall structure of the oxygen removal device from the gas inlet direction according to an example embodiment of the present application; Figure 3 is a schematic diagram of the overall structure of the oxygen removal device from the gas outlet direction according to an example embodiment of the present application; Figure 4 is a schematic diagram of the internal structure of the device body of the oxygen removal device from the gas outlet direction according to an example embodiment of the present application; Figure 5 is a schematic diagram of the top view structure of the first collecting pipe cross-section according to an example embodiment of the present application. Figure 6 is a schematic view of a connection structure of a cylinder, a first motor, a second motor and a mounting base according to an exemplary embodiment of the present application; Figure 7 is a side view of a connection structure of a cylinder, a first motor, a second motor and a mounting base according to an exemplary embodiment of the present application; Figure 8 is a cross-sectional view of a gas equalizing box according to an exemplary embodiment of the present application; Figure 9 is a schematic view of a gas equalizing box from a downstream side according to an exemplary embodiment of the present application; Figure 10 is a schematic view of a moving plate and a lifting block according to an exemplary embodiment of the present application.

[0028] Figure 11 is a schematic view of a lifting base according to an exemplary embodiment of the present application; Figure 12 is a schematic view of a cam and a pressure receiving bar at a top of a gas equalizing box according to an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0029] In order to make the technical solutions of the present application clearer, the present application will be further described in detail below in combination with the drawings and specific embodiments.

[0030] As shown in Figure 1 According to an exemplary embodiment of the present application, a flue gas treatment system is provided, which comprises, in series, (a) a pretreatment subsystem 101; (b) a temperature reduction and washing device 102 for reducing the temperature, removing dust and removing moisture from the flue gas; (c) an oxygen removal device 103 for removing oxygen from the flue gas from the temperature reduction and washing device; (d) a catalytic combustion subsystem 104 for burning carbon monoxide in the flue gas from the oxygen removal device; and (e) a waste heat recovery subsystem 105 for recovering heat from the high-temperature flue gas from the catalytic combustion subsystem.

[0031] Before catalytic combustion of the flue gas, oxygen in the flue gas is fully absorbed or removed by the oxygen removal device to avoid backfire from the downstream catalytic combustion subsystem to the upstream, thereby causing a backfire explosion accident in the upstream. The oxygen removal device can remove oxygen by adsorption of an adsorbent placed inside, or by catalytic oxidation of carbon monoxide and oxygen in the flue gas under the catalytic action of a catalyst inside (i.e. catalytic oxygen removal). Since the concentration of oxygen in the flue gas is not high, the concentration of oxygen (usually about 3%) is less than the concentration of carbon monoxide (usually about 16%), so catalytic oxygen removal consumes less heat value of the flue gas and is still feasible.

[0032] AsFigure 2 and Figure 3 As shown in Figs. 1 and 2, the oxygen removal device can include oxygen removal device bodies 1 containing catalysts (low-temperature catalysts oxidize CO in the flue gas at low temperature to combine into CO2, which is then discharged to achieve the purpose of oxygen removal from the flue gas) or adsorbents (oxygen is removed by adsorbing oxygen in the flue gas), and the number of oxygen removal device bodies 1 can be at least two.

[0033] According to an exemplary embodiment of the present application, the oxygen removal device includes: a gas inlet pipe 5 through which the flue gas to be treated enters the oxygen removal device; a first collecting pipe 4, the gas inlet pipe 5 being arranged on the front surface of the first collecting pipe 4; at least two branch pipes 3, the front ends of two branch pipes (3) of the at least two branch pipes 3 being fixedly connected to the first collecting pipe 4; at least two uniform gas boxes 2, the front surface of each uniform gas box 2 being fixedly connected to each branch pipe 3; at least two oxygen removal device bodies 1 for storing catalysts and / or adsorbents, each uniform gas box 2 being embedded in the front of each oxygen removal device body 1; at least two exhaust branch pipes 6 arranged behind the oxygen removal device bodies 1; a second collecting pipe 7, the rear ends of the at least two exhaust branch pipes 6 being fixedly connected to the second collecting pipe 7; and an exhaust main pipe 8, the rear surface of the second collecting pipe 7 being provided with the exhaust main pipe 8, through which the flue gas is discharged from the oxygen removal device.

[0034] When the number of the at least two oxygen removal device bodies 1 is an odd number greater than three, the number of the first collecting pipes 4 is more than two, one of the two branch pipes 3 connected to the first collecting pipe 4 on the most upstream side is connected to a uniform gas box 2, and the other of the two branch pipes 3 connected to the first collecting pipe 4 on the most upstream side is connected to a first collecting pipe 4 at the next level. The two branch pipes 3 of the first collecting pipe 4 at the next level are both connected to a uniform gas box 2 or both connected to a first collecting pipe 4 at a further next level.

[0035] When the number of the at least two oxygen removal device bodies 1 is an even number greater than three, the number of the first collecting pipes 4 is more than two, and the two branch pipes 3 connected to the first collecting pipe 4 on the most upstream side are both connected to a first collecting pipe 4 at the next level. The two branch pipes 3 of the first collecting pipe 4 at the next level are both connected to a uniform gas box 2 or both connected to a first collecting pipe 4 at a further next level.

[0036] Specifically, as shown in Figs. 1 and 2, the front surface of each oxygen removal device body 1 is fixedly connected with a uniform gas box 2, the front surface of the uniform gas box 2 is fixedly connected with a branch pipe 3, the front ends of the two branch pipes 3 are fixedly connected with a first collecting pipe 4, the front surface of the first collecting pipe 4 is provided with a gas inlet pipe 5, and the first collecting pipe 4 and the gas inlet pipe 5 are fixedly connected or integrally formed. Figure 2 and Figure 5 Specifically, as shown in Figs. 1 and 2, the front surface of each oxygen removal device body 1 is fixedly connected with a uniform gas box 2, the front surface of the uniform gas box 2 is fixedly connected with a branch pipe 3, the front ends of the two branch pipes 3 are fixedly connected with a first collecting pipe 4, the front surface of the first collecting pipe 4 is provided with a gas inlet pipe 5, and the first collecting pipe 4 and the gas inlet pipe 5 are fixedly connected or integrally formed.

[0037] The first manifold 4 defines a cylindrical cavity 27, consisting of three sections, for accommodating a sealing column 28 and its two adjacent cylinders 29. The sealing column 28 and its adjacent cylinders 29 are integrally formed, but are not integrally molded or fixedly connected to the intake duct 5. Instead, they are rotatable relative to the intake duct 5. The sealing column 28 and its adjacent cylinders 29 rotate within the cylindrical cavity 27, with a small clearance between them. An axial cavity is defined within the sealing column 28 and its front cylinder 29 (the shorter section). A docking hole 31 is defined in the outer wall of the sealing column 28, connecting the axial cavity and the interior of the sealing column 28 to the interior of the intake duct 5. The rear cylinder 29 extends rearward through the rear wall of the first manifold 4 and is fixedly connected to the output shaft of the first motor 21 via a coupling 38. A rotary hammer 24 is integrally molded or fixedly attached to the cylinder 29.

[0038] According to another embodiment of the present invention, in the case of three deoxygenation device bodies 1, a first collecting pipe 4 can be set first and then two branch pipes 3 can be set, one of which is directly connected to the gas equalizing box 2 and the deoxygenation device body 1, and the other branch pipe 3 is connected to another first collecting pipe (not shown in the figure), and then two secondary branch pipes 3 are set in the other first collecting pipe, and these two secondary branch pipes 3 are respectively connected to the two gas equalizing boxes 2 and the subsequent deoxygenation device body 1.

[0039] Two connecting cavities 30 are formed on the outside of the cylindrical cavity 27. The ends of the two connecting cavities 30 away from the cylindrical cavity 27 are respectively connected to the inside of the two branch pipes 3. In order to clearly see the structure of the connecting cavity 30 and the docking hole 31, Figure 5 When the cylinder 29 and the sealing column 28 rotate under the drive of the first motor 21, the docking hole 31 on the outer wall thereof can be aligned with one of the two communicating cavities 30, so that the air intake pipe 5 can be connected to one of the two branch pipes 3.

[0040] The air inlet pipe 5 is connected to the outside for introducing gas. The gas can be introduced into the two deoxygenation device bodies 1 for deoxygenation through the two branch pipes 3 on the first collecting pipe 4. The sealing column 28 is controlled to rotate by the first motor 21 so that the docking hole 31 is docked and connected with one of the two communicating cavities 30, so that the gas introduced through the air inlet pipe 5 is passed into the interior of one deoxygenation device body 1 separately, so that the two deoxygenation device bodies 1 can be used separately, which is convenient for internal adjustment, cleaning and maintenance of the other deoxygenation device body 1 without causing the entire production line to stagnate.

[0041] like Figure 3As shown, the rear of the oxygen removal device body 1 is provided with exhaust branch pipes 6, the rear ends of the two exhaust branch pipes 6 are fixedly connected with a second collecting pipe 7, and the rear surface of the second collecting pipe 7 is integrally formed with an exhaust main pipe 8. For safety, when replacing the oxygen removal device body 1, attention should be paid to seal the temporarily disabled branch pipes 3 and exhaust branch pipes 6 to prevent gas leakage.

[0042] A one-way exhaust valve 14 is fixedly installed between the exhaust branch pipe 6 and the oxygen removal device body 1.

[0043] The flue gas after oxygen removal in the two oxygen removal device bodies 1 can be discharged through the exhaust main pipe 8, and the one-way exhaust valve 14 is provided to prevent gas backflow.

[0044] Figure 4 is a schematic diagram of the internal structure of the oxygen removal device body according to an exemplary embodiment of the present application, as viewed from the rear (exhaust direction), as shown in Figure 4 As shown, the oxygen removal device body 1 has multiple compartments inside, and each compartment is placed with an adsorbent or a catalyst, thereby forming an adsorption oxygen removal device or a catalytic oxygen removal device.

[0045] The adsorption oxygen removal device directly uses some porous adsorbent material to adsorb oxygen, and after the flue gas passes through the exhaust main pipe 8 (see Figure 3 ), the distance between the oxygen removal device and the catalytic combustion subsystem can be set a little longer, so that the distance of the extremely low oxygen concentration near the fire source position is longer, so as not to transmit back to the fire and cause explosion, ensuring the safety of the upstream. In an embodiment, porous adsorbent materials such as tetracyanoquinodimethane (TCNQ) can be used. Since this material only reacts with the electrons of oxygen in the air, only oxygen molecules can be adsorbed into the material through the small pores of the material, so that the oxygen in the air can be easily separated. Of course, other materials that can reduce the oxygen content can also be selected. However, the cost of this oxygen removal device is relatively high compared to the catalytic oxygen removal device. In order to improve the oxygen removal efficiency, the gas needs to be in full contact with the adsorbent material, and the contact area needs to be increased, so these adsorbent materials are distributed in multiple internal compartments of the oxygen removal device body 1.

[0046] The catalytic oxygen removal device preferably uses honeycomb ceramic as a carrier (preferably honeycomb cordierite), and a catalyst in which a noble metal (preferably platinum) is applied as an active component, and the amount of the noble metal is controlled so as to enable oxidation of carbon monoxide with oxygen at a lower temperature (for example, 100 to 300 degrees Celsius) lower than the ignition point of carbon monoxide (approximately 650 degrees Celsius under normal pressure and concentration of carbon monoxide), thereby consuming oxygen. Since there is no combustion, backfire explosion does not occur. In order to improve the oxygen removal efficiency, it is required that the gas be in sufficient contact with the catalyst, and the contact area is increased, and therefore the honeycomb ceramic coated with the catalyst is dispersed in the plurality of internal compartments of the oxygen removal device main body 1.

[0047] The catalytic oxygen removal device can operate at a low temperature of 100 to 300 degrees Celsius, and even if a flame occurs by mistake when the catalytic combustion sub-system 104 is combusting, since the oxygen concentration is reduced to a very low level (for example, 1% VOL or less) by the catalytic oxygen removal device 103, the flame does not have the condition to be transmitted back, and backfire explosion can be prevented.

[0048] As shown in Figure 8 , Figure 9 and Figure 10 , the inlet chamber 41 and the lifting block chamber 43 are provided in the equalization tank 2. The moving plate 39 can reciprocate up and down in the inlet chamber 41, and the lifting block 35 can reciprocate up and down in the lifting block chamber 43. Preferably, the inlet chamber 41 includes a relatively low gas collection chamber at the front (inlet direction) and a relatively high moving plate chamber 410 at the rear (outlet direction), and the relatively high moving plate chamber 410 has a height greater than that of the gas collection chamber, and the moving plate 39 can reciprocate up and down in the moving plate chamber 410.

[0049] The flue gas enters the inlet chamber 41 of the equalization tank 2 through the branch pipe 3. The inlet chamber 41 is provided with a moving plate 39 having a window 51, and the moving plate 39 is fixedly connected to the pressure receiving bar 19 (see Figure 2 ) by the lifting block 35, or the moving plate 39, the lifting block 35 and the pressure receiving bar 19 are integrally formed. As shown in Figure 8 and Figure 9 , a plurality of through-type through grooves 40 are formed in the rear of the equalization tank 2, the through grooves 40 are in communication with the internal compartments of the oxygen removal device main body 1 (for example, Figure 4 ), and the number of the through grooves 40 is equal to or corresponds to the number of the internal compartments of the oxygen removal device main body 1. The width of the through grooves 40 gradually increases from the upstream side to the downstream side, and the pitch (center distance in the height direction) of each through groove 40 gradually increases from the upstream side to the downstream side. Although Figure 8 the height of each through groove 40 is substantially constant from the upstream side to the downstream side, it is preferable that the height of each through groove 40 gradually increases from the upstream side to the downstream side. As shown in Figure 9As shown, the area of ​​the window formed by the middle through groove 40 on the rear surface of the gas equalizing box 2 is smaller than the area of ​​the window formed by the through grooves 40 on the side on the rear surface of the gas equalizing box 2. If there are no multiple through grooves 40 and multiple internal compartments, the flue gas will only directly enter the interior of the deoxygenating device body 1 through one branch pipe 3, and the flue gas will basically only pass through a relatively small area in the middle facing the direct pipe 3. The oxygen in the flue gas cannot fully contact the adsorption material or catalyst in each area of ​​the deoxygenating device body 1, and the oxygen cannot be fully removed. By setting up multiple through grooves 40 and multiple internal compartments, the gas entering the gas equalizing box 2 is diverted to the multiple compartments inside the deoxygenating device body 1 through multiple through grooves 40, so that the gas can be evenly distributed inside the deoxygenating device body 1.

[0050] like Figure 2 、 Figure 7 、 Figure 8 and Figure 9 As shown, further, the cam 18 is driven to rotate by the second motor 17, thereby controlling the pressure-receiving strip 19 in contact with the cam 18 to move back and forth up and down, which can drive the movable plate 39 to rotate back and forth up and down in the inlet chamber 41. The movable plate 39 has a window 51. The height of the window 51 and the movable plate 39 is set to be able to connect with at least a part of the through slots 40 (for example, connecting with 3 through slots 40) while blocking other through slots 40, so that the gas not only enters the central compartment of the deoxygenation device body 1 but also enters the edge compartments in the deoxygenation device body 1, so that the flue gas is fully in contact with the adsorption material or catalyst at various locations, which is more conducive to gas deoxygenation.

[0051] In order to ensure airtightness, Figures 8-10 As shown, the width W of the movable plate 39 is set to be very close to the width of the movable plate cavity 410 (the width along the direction of the first collecting pipe 4), and the thickness t1 of the movable plate 39 is set to be very close to the thickness of the movable plate cavity 410. The movable plate 39 is gap-matched with the movable plate cavity 410 in the width and thickness directions, and a sealing ring is used to seal between them. The position of the sealing ring (as shown in FIG. Figure 10 (shown by the middle dashed line) is lower than the connection area between the lifting block 35 and the movable plate 39; The thickness t2 of the lifting block 35 is set close to the thickness of the lifting block cavity 43, and the thickness of the movable plate 39 is set to be greater than the thickness of the lifting block cavity 43. To enhance airtightness, the cross-sectional area of ​​the lifting block cavity 43 is as small as possible. The height of the lifting block cavity 43 is equal to the maximum distance the movable plate 39 can move up and down within the movable plate cavity 410. Lubricating oil can be added between the lifting block cavity 43 and the lifting block 35.

[0052] The height h of the moving plate 39 is set to be less than the height of the moving plate cavity 410 but greater than the height of the lifting block cavity 43, and no matter where the moving plate 39 moves in the moving plate cavity 410, the side wall of the moving plate 39 can block the lifting block cavity 43.

[0053] The two oxygen removal device bodies 1 are fixedly connected together on the opposite sides above the two oxygen removal device bodies 1. The front surface of the mounting plate 20 is fixedly connected with two second motors 17. The front ends of the output shafts of the two second motors 17 are fixedly connected with two cams 18 respectively.

[0054] The rear surface of the mounting plate 20 is fixedly connected with a first motor 21. A circular hole is arranged on the mounting plate 20. The output shaft of the first motor 21 passes through the circular hole forwardly. The diameter of the circular hole is set to be greater than the diameter of the output shaft and the two do not contact, so that the output shaft of the first motor 21 can rotate freely relative to the circular hole of the mounting plate 20. The output shaft of the first motor 21 is fixedly connected with the cylinder 29 through a shaft coupling 38. When the cylinder 29 is driven by the first motor 21 to rotate back and forth, the rotating hammer 24 integrally formed on or fixedly connected with the cylinder 29 also rotates back and forth. The electrical signal input to the first motor 21 is a pulse waveform with the direction of voltage changing periodically. When the rotating hammer 24 rotates to the right position, the right button switch 25 can be pressed down, so that the power supply of the right second motor 17 is turned on, and the right second motor 17 can drive the cam 18 to move back and forth, so that the moving plate 39 in the right gas equalizing tank 2 moves up and down back and forth, so that the gas is uniformly spread into the multiple internal compartments of the right oxygen removal device body 1 and fully contacts with the adsorbent / catalyst everywhere. When the rotating hammer 24 rotates to the left position, the left button switch 25 can be pressed down, so that the power supply of the left second motor 17 is turned on, and the left second motor 17 can drive the cam 18 to move back and forth, so that the moving plate 39 in the left gas equalizing tank 2 moves up and down back and forth, so that the gas is uniformly spread into the multiple internal compartments of the left oxygen removal device body 1 and fully contacts with the adsorbent / catalyst everywhere.

[0055] As shown in Figure 2 , Figure 5 and Figure 7 , by setting the relative positions and sizes of the sealing column 28, the butt joint hole 31, the cylinder 29, the rotating hammer 24, the first motor 21 and the second motor 17, when the butt joint hole 31 communicates with one of the two oxygen removal device bodies 1, the second motor 17 also controls the moving plate 39 inside the same oxygen removal device body 1 to move up and down back and forth.

[0056] According to another exemplary embodiment of the present application, as shown in Figure 11As shown, in order to further enhance the air tightness of the whole system, a lifting seat 32 is embedded in the equalizing tank 2, a lifting block cavity 43 is formed in the front surface of the lifting seat 32, a lifting rod 34 is fixedly connected inside the lifting block cavity 43, a lifting block 35 is sleeved outside the lifting rod 34, the open side of the lifting block cavity 43 faces the pressure receiving strip 19, the rear thin wall of the lifting seat 32 closes the entrance cavity 41 so as to make it a completely sealed cavity, the entrance cavity 41 is not communicated with the lifting block cavity 43, and the rear thin wall of the lifting seat 32 is between the entrance cavity 41 and the lifting block cavity 43. The lifting block 35 is a magnet / magnetite, and the moving plate 39 comprises or is formed of ferromagnetic material. In order to reduce the weight of the moving plate 39, the moving plate 39 preferably comprises ferromagnetic material only on the side close to the lifting block 35. Of course, the lifting block 35 can be made of ferromagnetic material, and the moving plate 39 comprises a magnet. In yet another embodiment, the lifting block 35 and the moving plate 39 can both comprise a magnet / magnetite. The lifting block 35 is fixedly connected with the pressure receiving strip 19, and the lifting block 35 can attract the moving plate 39 through the above-mentioned thin wall. The lifting block 35 is fixedly connected with the pressure receiving strip 19, the second motor 17 drives the cam 18, the pressure receiving strip 19 and the lifting block 35 to reciprocate up and down, and then the lifting block 35 drives the moving plate 39 to reciprocate up and down in the entrance cavity 41.

[0057] In order to ensure that the pressure receiving strip 19 can follow the downward rotating cam 18, a spring 36 can be sleeved outside the lifting rod 34 between the bottom of the lifting block cavity 43 and the lifting block 35. The upper end of the spring 36 is fixedly connected with the lower part of the lifting block 35, and the lower end of the spring 36 is fixedly connected with the bottom of the lifting block cavity 43. The spring 36 is usually in a stretched state. After the protruding part of the cam 18 rotates downward, the pressure receiving strip 19 can be controlled to reset downward under the pulling of the spring 36. The pulling force of the spring 36 should not be too large.

[0058] According to still another exemplary embodiment of the present application, as shown in Figure 12 As shown, in order to further enhance the air tightness of the whole system, the second motor 17, the cam 18 and the pressure receiving strip 19 are no longer arranged on the side of the equalizing tank 2, but are arranged on the upper part of the equalizing tank 2 (as shown in the figure, Figure 12 only the positions of the second motor 17, the cam 18 and the pressure receiving strip 19 on the right side are adjusted), so that the vertical part of the pressure receiving strip 19 can extend into the equalizing tank 2 and is fixedly connected with the moving plate 39. Since the vertical part of the pressure receiving strip 19 can be a cylindrical column or a square column, the area of the entrance cavity 41 which is open outward will be greatly reduced compared with the side windowing mode, and the air tightness of the whole system will be enhanced with the cooperation of the sealing ring.

[0059] According to still another exemplary embodiment of the present application, Figure 12The second motor 17, the cam 18 and the pressure resisting strip 19 arranged on the upper part of the equalizing box 2 in the above embodiment are replaced by an electric push rod 17 (the second motor 17 or the electric push rod 17 can be replaced by a second driving source 17), the push rod of the electric push rod 17 can extend into the equalizing box 2 and is fixedly connected with the moving plate 39, pulse signals are applied to the electric push rod 17, and the moving plate 39 can be driven to reciprocate up and down.

[0060] According to the exemplary embodiments of the present application, the oxygen removal device comprises a controller, the controller controls the first motor 21 to make the power supply of the second driving source 17 on the corresponding oxygen removal device body 1 be turned on when the docking hole 31 is aligned with one of the two communicating cavities 30, and make the moving plate 39 in the corresponding oxygen removal device body 1 reciprocate up and down, while the moving plate 39 in the other oxygen removal device body 1 stops moving.

[0061] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that, for the ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope 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 deoxygenation device comprising: An air inlet pipe (5), through which the flue gas to be treated enters the deoxidation device; a first collecting pipe (4), the air inlet pipe (5) being fixedly connected to the front surface of the first collecting pipe (4); At least two branch pipes (3), front ends of two branch pipes (3) of the at least two branch pipes (3) being fixedly connected to a first collecting pipe (4); At least two air equalizing boxes (2), the front surface of each of the air equalizing boxes (2) being fixedly connected to each of the branch pipes (3); At least two deoxygenation device bodies (1) are used to store catalysts and / or adsorbents, and each of the gas equalization boxes (2) is embedded in the front of each of the deoxygenation device bodies (1); At least two exhaust branch pipes (6) are arranged behind the deoxygenation device body (1); a second collecting pipe (7), the rear ends of the at least two exhaust branch pipes (6) being fixedly connected to the second collecting pipe (7); An exhaust main pipe (8) is provided on the rear surface of the second collecting pipe (7), and the flue gas is discharged from the deoxidation device through the exhaust main pipe (8).

2. The deoxidation device according to claim 1, wherein: When the number of the at least two deaerator bodies (1) is an odd number greater than three, the number of the first collecting pipes (4) is greater than two, and one of the two branch pipes (3) connected to the first collecting pipe (4) on the most upstream side is connected to the gas equalizing box (2), and the other of the two branch pipes (3) connected to the first collecting pipe (4) on the most upstream side is connected to the first collecting pipe (4) of the next stage; When the number of the at least two deaerator bodies (1) is an even number greater than three, the number of the first collecting pipes (4) is greater than two, and the two branch pipes (3) connected to the first collecting pipe (4) on the most upstream side are respectively connected to the first collecting pipe (4) of the next stage.

3. The deoxidation device according to claim 1, wherein: A cylindrical cavity (27) is provided inside the first collecting pipe (4), and a sealing column (28) and a cylinder (29) before and after it are accommodated inside the cylindrical cavity (27). The sealing column 28 and the cylinder (29) before and after it can rotate relative to the intake pipe (5). An axial cavity is provided inside the sealing column (28) and the cylinder (29) on the upstream side thereof to communicate with the interior of the intake pipe (5). A docking hole (31) is provided on the outer wall of the sealing column (28), and the docking hole (31) is communicated with the axial cavity. Two communicating cavities (30) are provided on both sides of a sealing column (28), and a docking hole (31) can be connected to one of the two communicating cavities (30). Ends of the two communicating cavities (30) away from the cylindrical cavity (27) are respectively connected to the interiors of the two branch pipes (3).

4. The deoxidation device according to claim 3, wherein: The deoxygenator further comprises a mounting plate (20) fixed to the deoxygenator body (1) and a first motor (21) fixed to the mounting plate (20); a cylinder (29) behind the sealing column (28) penetrates the rear wall of the first collecting pipe (4) and is fixedly connected to the output shaft of the first motor (21); the first motor (21) is capable of driving the cylinder (29) and the sealing column (28) to rotate, so that the docking hole (31) can be aligned with one of the two communicating cavities (30).

5. The deoxidation device according to claim 4, wherein: A rotary hammer (24) is integrally formed on or fixedly connected to the cylinder (29) of the deaerator. When the rotary hammer (24) swings left and right to a specific position, the switch (25) at the specific position can be turned on, thereby turning on the power of the corresponding second driving source, thereby causing the movable plate (39) in the gas equalizing box (2) on the corresponding side to reciprocate up and down.

6. The deoxidation device according to claim 5, wherein: The second driving source is a second motor, the second motor (17) drives the cam (18) to reciprocate, the cam (18) drives the pressure bar (19) to reciprocate up and down, and the pressure bar (19) drives the movable plate (39) to reciprocate up and down; or, The second driving source is an electric push rod (17), the output end of which is directly or indirectly fixedly connected to the movable plate (39), and the output end of the electric push rod drives the movable plate (39) to move up and down.

7. The deoxidation device according to claim 5, wherein: An inlet chamber (41) and a lifting block chamber (43) are provided in the air equalizing box (2); the movable plate (39) can reciprocate up and down in the inlet chamber (41); and the lifting block (35) can reciprocate up and down in the lifting block chamber (43).

8. The deoxidation device according to claim 7, wherein: The inlet chamber (41) includes a gas collecting chamber at the front and a movable plate chamber (410) at the rear. The height of the movable plate chamber (410) is greater than that of the gas collecting chamber. The movable plate (39) can reciprocate up and down in the movable plate chamber (410).

9. The deoxidation device according to claim 8, wherein: The pressure-bearing strip (19) is located on the side of the air box (2). The width of the movable plate (39) is set to be close to the width of the movable plate cavity (410), and the thickness of the movable plate (39) is set to be close to the thickness of the movable plate cavity (410). The movable plate (39) is clearance-matched with the movable plate cavity (410) in the width and thickness directions, and a sealing ring is used to seal between them. The position of the sealing ring is lower than the position of the connection area between the lifting block (35) and the movable plate (39); The thickness of the lifting block (35) is set to be close to the thickness of the lifting block cavity (43), the thickness of the movable plate (39) is set to be greater than the thickness of the lifting block cavity (43), and the height of the lifting block cavity (43) is equal to the maximum distance that the movable plate (39) can move up and down in the movable plate cavity (410); The height of the movable plate (39) is set to be less than the height of the movable plate cavity (410) but greater than the height of the lifting block cavity (43), and no matter to which height position the movable plate (39) moves in the movable plate cavity (410), it is ensured that the side wall of the movable plate (39) blocks the lifting block cavity (43).

10. The deoxidation device according to claim 8, wherein: The pressure-bearing strip (19) is located on the side of the air box (2). A lifting seat (32) is also embedded in the gas equalizing box (2), and the lifting seat (32) is fixed relative to the gas equalizing box (2). A lifting block cavity (43) is opened on the front surface of the lifting seat (32), and a lifting rod (34) is fixedly connected to the interior of the lifting block cavity (43). A lifting block (35) is sleeved on the outer side of the lifting rod (34). The open front side of the lifting block cavity (43) faces the pressure-receiving bar (19). The rear wall of the lifting seat (32) closes the inlet cavity (41), thereby making the inlet cavity (41) a completely sealed cavity. The rear wall of the lifting seat (32) is between the inlet cavity (41) and the lifting block cavity (43). The materials used to make the lifting block (35) and the movable plate (39) include ferromagnetic materials, magnets and / or magnets, and the movable plate (39) also includes non-magnetic materials. The lifting block (35) can attract the movable plate (39) through the rear wall of the lifting seat (32) by magnetic force.

11. The deoxidation device according to claim 9, wherein: A spring (36) is sleeved on the outside of the lifting rod (34), the upper end of the spring (36) is fixedly connected to the lower part of the lifting block (35), and the lower end of the spring (36) is fixedly connected to the bottom of the lifting block cavity (43). The spring (36) is in a stretched state in the working state to ensure that the compressed support bar (19) can also move downward when the protruding end of the cam (18) rotates downward.

12. The deoxidation device according to claim 8, wherein: In the case where the second driving source is the second motor (17), the second motor (17), the cam (18) and the pressure-receiving strip (19) are located at the top of the air-equalizing box (2), the top end of the movable plate (39) is fixedly connected to the lower end of the pressure-receiving strip (19), and a cylindrical hole is provided on the upper portion of the air-equalizing box (2) for the vertical portion of the pressure-receiving strip (19) to move up and down; When the second driving source is an electric push rod (17), the electric push rod (17) is located at the top of the air equalizing box (2), the top end of the movable plate (39) is fixedly connected to the push rod of the electric push rod, and a cylindrical hole is provided on the upper part of the air equalizing box (2) for the push rod of the electric push rod to move up and down.

13. The deoxidation device according to claim 7, wherein: The rear surface of the gas equalizing box (2) is provided with a plurality of through slots (40), each deaerator body (1) has multiple layers of compartments, and each of the through slots (40) is connected to each layer of compartments of the deaerator body (1). The width of each through groove (40) gradually increases from the upstream side to the downstream side, the pitch of each through groove (40) along the height direction gradually increases from the upstream side to the downstream side, and the height of each through groove (40) gradually increases from the upstream side to the downstream side.

14. The deoxidation device according to claim 13, wherein: The cross-sectional area of ​​the middle through groove (40) is smaller than the cross-sectional areas of the through grooves (40) on both sides.

15. The deoxidation device according to claim 1, wherein: A one-way exhaust valve (14) is fixedly installed between the exhaust branch pipe (6) and the deoxygenation device body (1).

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