Desulfurization device

Abstract

The utility model discloses a desulfurization device, relates to flue gas purification technical field, wherein the desulfurization device includes shell, supplementary material mechanism and discharge mechanism, the shell has a cavity, with the feed inlet and discharge port of cavity intercommunication. According to the technical scheme provided by the utility model, through the arrangement of the air inlet, waste gas can enter the cavity, when the waste gas passes through the adsorption bed, harmful substances (such as sulfur dioxide) in the waste gas are captured by the adsorption material, and along with the gradual saturation of the adsorption material, a new adsorption material is added to the upper part of the adsorption bed from the material supplementing bin through the feeding hole, so that the waste gas is completely adsorbed. The used adsorption material settles to the lower part of the adsorption bed under the action of gravity, and is finally discharged into the discharge bin through the discharge port, so that the replacement of the adsorption material is completed, the sulfur capacity of the adsorption material is fully utilized through an intermittent updating mechanism of the adsorption material, and the adsorption efficiency is improved. And the abrasion of the adsorption material in the desulfurization device during circulating movement is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas purification technical field, especially a kind of desulfurization device. BACKGROUND

[0002] Most of sulfur oxides is sulfur dioxide (SO2), and active coke desulfurization is carried out by physical adsorption and chemical adsorption. Under the action of van der waals force and chemical affinity, SO2 is captured (physical adsorption) after moving from gas phase to the surface of active coke particles. Then, it is oxidized to SO3 in the pores of active coke and reacts with adsorbed H2O to be captured (chemical adsorption) as H2SO4.

[0003] In the active coke desulfurization and denitrification system, the bed design is the basis for achieving the target purification effect. Today, the cross-flow adsorption tower structure has become the most widely used type in the active coke treatment process for sintering flue gas in China. The biggest structural feature of the cross-flow adsorption tower is the active coke moving bed, that is, a long axis unloader with the same length as the width of the active coke bed is arranged at the bottom of the adsorption tower, so that the active coke is uniformly discharged at the same speed along the horizontal direction of the long axis unloader. However, in the moving bed, especially for low SO2 concentration flue gas conditions, the adsorption performance of active coke cannot be fully utilized, resulting in large loading amount of active coke and high active coke wear rate. SUMMARY

[0004] The main purpose of the utility model is to provide a desulfurization device that can fully utilize the adsorption material under low concentration sulfur dioxide flue gas conditions.

[0005] To achieve the above purpose, the desulfurization device provided by the utility model comprises:

[0006] The shell has a cavity, a feed inlet and a discharge outlet communicating with the cavity, and an air inlet and an air outlet communicating with the cavity. The feed inlet is arranged above the discharge outlet. The cavity is used to load adsorption material to form an adsorption bed. The air inlet and the air outlet are arranged opposite to the two sides of the adsorption bed.

[0007] The feeding mechanism comprises a feeding bin, which is located above the shell and can be opened and closed corresponding to the feed inlet. The feeding bin can communicate with the feed inlet.

[0008] The discharging mechanism comprises a discharging bin, which is located below the shell and can be opened and closed corresponding to the discharge outlet. The discharging bin can communicate with the discharge outlet.

[0009] When the exhaust gas flow introduced into the gas inlet flows through the cavity and is discharged through the gas outlet, the used adsorbent material on the adsorption bed can be discharged from the material outlet into the discharge bin.

[0010] In an embodiment, the gas inlet and / or the gas outlet are vertically arranged on the side surface of the shell.

[0011] The gas inlet and the gas outlet are oppositely arranged along the radial direction of the shell.

[0012] In an embodiment, a plurality of perforated plates are arranged in the shell along the radial direction of the shell, each of the perforated plates being used to divide the cavity into a plurality of adsorption cavities.

[0013] In an embodiment, the plurality of adsorption cavities are symmetrically arranged along the axis extending in the up-down direction with the gas inlet as the center point.

[0014] In an embodiment, the desulfurization device further comprises a protection mechanism, the protection mechanism comprising at least one nitrogen pipe opening arranged on at least one of the material supply bin, the discharge bin and the shell.

[0015] In an embodiment, the adsorption bed is sequentially arranged in the up-down direction with a storage section, an adsorption section and a discharge section that are in communication with each other, the side of the storage section away from the adsorption section being in communication with the material supply bin, and the side of the discharge section away from the adsorption section being in communication with the discharge bin.

[0016] In an embodiment, the material supply mechanism further comprises at least one of a feeding hopper, a feeding pipe and a first discharger.

[0017] In an embodiment, the discharge mechanism further comprises at least one of a discharging hopper, a second discharger and a rotary valve.

[0018] In an embodiment, the adsorption section is symmetrically distributed with three adsorption bed layers along the radial direction of the shell with the gas inlet as the center point.

[0019] In an embodiment, the adsorbent material comprises activated coke.

[0020] The utility model discloses a technical scheme passes through the setting of the air inlet, and the waste gas can enter the cavity, when passing through the adsorption bed, the harmful substance (such as sulfur dioxide) in the waste gas is captured by the adsorption material, with the adsorption material gradually saturated, the new adsorption material is added to the upper portion of the adsorption bed from the material supplement bin via the feed inlet, and the used adsorption material settles to the lower portion of the adsorption bed due to the gravity effect and is finally discharged to the discharge bin through the discharge outlet, the replacement of the adsorption material is completed, the sulfur capacity of the adsorption material is fully utilized through the intermittent renewal mechanism of the adsorption material, the wear of the adsorption material in the circulating movement in the desulfurization device is reduced, the loading amount and the loss of the adsorption material are effectively reduced, and the harmful components in the waste gas are continuously and effectively removed. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the structure shown in the drawings without the creative labor for the ordinary skilled in the art.

[0022] Figure 1 The structure schematic diagram of the embodiment of the desulfurization device provided by the utility model is shown in the figure.

[0023] Figure 2 The Figure 1 The local enlarged view of A in the figure.

[0024] Figure 3 The Figure 1 The local enlarged view of B in the figure.

[0025] Figure 4 The Figure 1 The rear view of the figure.

[0026] EXPLANATION OF DRAWINGS:

[0027] 100, desulfurization device, 1, shell, 11, cavity, 12, feed inlet, 13, discharge outlet, 14, air inlet, 15, air outlet, 2, material supplement mechanism, 21, material supplement bin, 22, feed hopper, 23, feed pipe, 24, first unloader, 3, discharge mechanism, 31, discharge bin, 32, discharge hopper, 33, second unloader, 34, rotary valve, 4, orifice plate, 5, protection mechanism, 51, nitrogen pipe orifice, 6, storage section, 7, adsorption section, 8, discharge section.

[0028] The purposes, functional features and advantages of the utility model will be further described in combination with embodiments with reference to the drawings. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0030] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0031] In addition, the description of "first", "second" and the like in the utility model is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the fact that those skilled in the art can realize it, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0032] Most of the sulfur oxides are sulfur dioxide (SO2), and the active coke desulfurization is carried out by physical adsorption and chemical adsorption. Under the action of van der Waals force and chemical affinity, SO2 is captured (physical adsorption) after moving from the gas phase to the surface of the active coke particles. Then, it is oxidized to SO3 in the pores of the active coke and reacts with the adsorbed H2O to be captured (chemical adsorption) as H2SO4.

[0033] In the active coke desulfurization and denitrification system, the bed layer design is the basis to achieve the target purification effect. Now, the cross-flow type adsorption tower structure has become the most widely used type in the active coke treatment process for sintering flue gas in China. The biggest structural feature of the cross-flow type adsorption tower is the active coke moving bed, that is, a long axis unloader with the same length as the width of the active coke bed is arranged at the bottom of the adsorption tower, so that the active coke is uniformly discharged at the same speed along the length of the long axis unloader in the horizontal direction. However, in the moving bed, especially for low SO2 concentration flue gas conditions, the adsorption performance of the active coke cannot be fully utilized, resulting in large loading amount of active coke and high active coke wear rate.

[0034] The utility model provides a kind of desulfurization device, to provide a kind of desulfurization device can be under the condition of low concentration sulfur dioxide flue gas, fully utilize adsorbing material.

[0035] Please refer to Figures 1 to 4 In an embodiment of the utility model, the desulfurization device 100 includes shell 1, replenishing mechanism 2 and discharge mechanism 3;The shell 1 has a cavity 11, the feed inlet 12 and the discharge outlet 13 communicated with the cavity 11, and the gas inlet 14 and the gas outlet 15 communicated with the cavity 11, the feed inlet 12 is arranged above the discharge outlet 13, the cavity 11 is used to load adsorbing material to form adsorption bed, the gas inlet 14 and the gas outlet 15 are oppositely arranged with the two sides of the adsorption bed;The replenishing mechanism 2 includes replenishing bin 21, the replenishing bin 21 is located above the shell 1, and can be opened and closed corresponding to the feed inlet 12, the replenishing bin 21 can be communicated with the feed inlet 12;The discharge mechanism 3 includes discharge bin 31, the discharge bin 31 is located below the shell 1, and can be opened and closed corresponding to the discharge outlet 13, the discharge bin 31 can be communicated with the discharge outlet 13;When the exhaust gas introduced in the gas inlet 14 flows through the cavity 11 and is discharged through the gas outlet 15, the adsorbing material to be used in the replenishing bin 21 can be from the replenishing bin 21, and enter the upper part of the cavity 11 through the feed inlet 12, so that the used adsorbing material on the adsorption bed is discharged from the discharge outlet 13 into the discharge bin 31.

[0036] The technical scheme of the utility model is through the setting of the gas inlet 14, the exhaust gas can enter the cavity 11, when passing through the adsorption bed, harmful substances (such as sulfur dioxide) in the exhaust gas are captured by adsorbing material, as the adsorbing material gradually saturates, new adsorbing material is added to the upper part of the adsorption bed from the replenishing bin 21 through the feed inlet 12, the used adsorbing material settles to the lower part of the adsorption bed due to gravity, and is finally discharged into the discharge bin 31 through the discharge outlet 13, completing the replacement of adsorbing material, through the intermittent updating mechanism of adsorbing material, the sulfur capacity of adsorbing material is fully utilized, the wear of adsorbing material circulating and moving in the desulfurization device 100 is reduced, the filling amount and loss of adsorbing material are effectively reduced, so that harmful components in the exhaust gas are continuously and effectively removed.

[0037] It should be noted that the present application is applicable to desulfurization under the condition of low concentration sulfur dioxide.

[0038] It can be understood that the specific manner of the openable and closable arrangement can be a rotating door type, i.e., a rotating shaft and a hole plate 4 are installed on the feed inlet 12, the hole plate 4 is capable of rotating around the rotating shaft, and the opening and closing of the hole plate 4 is achieved by rotating to open or close the hole plate 4; or a pneumatic or motor-driven type, i.e., a hole plate 4 is installed on the feed inlet 12, the opening and closing of the hole plate 4 is driven by a pneumatic cylinder or a motor, and the opening and closing of the hole plate 4 is controlled by a control system sending a signal; or a spring reset type, i.e., a hole plate 4 is installed on the feed inlet 12, and the hole plate 4 is connected by a spring, and when the external force disappears, the spring will automatically reset the hole plate 4 to a closed state.

[0039] It can be understood that the specific manner of the opposite arrangement of the air inlet 14 and the air outlet 15 can be on the two sides of the adsorption bed along the vertical direction; or on the two sides of the adsorption bed along the radial direction of the shell 1.

[0040] In an embodiment, the air inlet 14 is vertically provided on the side surface of the shell 1; the air inlet 14 and the air outlet 15 are oppositely arranged along the radial direction of the shell 1. The air outlet 15 is vertically provided on the side surface of the shell 1; the air inlet 14 and the air outlet 15 are oppositely arranged along the radial direction of the shell 1.

[0041] In this way, by arranging the air inlet 14 vertically on the side surface of the shell 1, the exhaust gas enters the adsorption bed more smoothly, which is beneficial to the uniform adsorption of the exhaust gas by the adsorption material. By oppositely arranging the air inlet 14 and the air outlet 15 along the radial direction of the shell 1, the residence time of the exhaust gas in the adsorption bed is prolonged, the pressure drop is reduced, the contact area between the exhaust gas and the adsorption material is increased, and thus the adsorption effect is improved.

[0042] It should be noted that in other embodiments, the cavity 11 is provided with an air inlet chamber communicating with the air inlet 14 and an air outlet chamber communicating with the adsorption bed; the air outlet chamber communicates with the air outlet 15.

[0043] In this way, the air inlet chamber and the air outlet chamber can buffer the exhaust gas, so that the entering exhaust gas is diffused in a larger space before entering the adsorption bed, which helps to reduce the speed difference of the exhaust gas entering the adsorption chamber and makes the airflow more uniform.

[0044] In some embodiments, a plurality of hole plates 4 are arranged in the radial direction of the shell 1 in the shell 1, and each hole plate 4 is used to separate the cavity 11 into a plurality of adsorption cavities.

[0045] In this way, the gas flow can be distributed more evenly in each cavity through the plurality of adsorption cavities, avoiding the phenomenon of excessive concentration of the gas flow generated by the waste gas in a certain area, causing local saturation of the adsorbent material, ensuring the efficiency of the entire adsorption process, and improving the adsorption efficiency.

[0046] In an embodiment, the plurality of adsorption cavities are arranged symmetrically along the axis extending in the up-down direction with the gas inlet 14 as the center point.

[0047] In this way, the gas flow can be distributed more evenly in each cavity through the plurality of adsorption cavities, avoiding the phenomenon of excessive concentration of the gas flow generated by the waste gas in a certain area, causing local saturation of the adsorbent material, ensuring the efficiency of the entire adsorption process, and improving the adsorption efficiency.

[0048] In some embodiments, the desulfurization device 100 further comprises a protection mechanism 5, which comprises at least one nitrogen pipe 51, and the nitrogen pipe 51 is arranged on at least one of the material supplement bin 21, the material discharge bin 31 and the shell 1.

[0049] In this way, nitrogen can be introduced into at least one of the material supplement bin 21, the material discharge bin 31 and the shell 1 through the nitrogen pipe 51, thereby sealing the flue gas.

[0050] It should be noted that the nitrogen should be continuously introduced to improve the sealing effect of the flue gas.

[0051] In an embodiment, the adsorption bed is sequentially arranged with a storage section 6, an adsorption section 7 and a material discharge section 8 in the up-down direction, the storage section 6 is in communication with the material supplement bin 21 away from the adsorption section 7, and the material discharge section 8 is in communication with the material discharge bin 31 away from the adsorption section 7.

[0052] In this way, the adsorbent material can be pretreated (such as preheating, precooling, pre-drying, etc.) before adsorption, thereby improving the working efficiency of the adsorbent material. The design that the storage section 6 is in communication with the material supplement bin 21 and the material discharge section 8 is in communication with the material discharge bin 31 allows the adsorbent material to continuously enter and discharge the adsorption bed, ensuring the continuity and efficiency of the adsorption process.

[0053] In an embodiment, the material supplement mechanism 2 further comprises at least one of a feed hopper 22, a feed pipe 23 and a first discharger 24.

[0054] It should be noted that in the present application, the feeding mechanism 2 further comprises a feeding hopper 22, a feeding pipe 23 and a first discharger 24, wherein one end of the feeding pipe 23 is communicated with the lower part of the feeding bin 21, the other end is communicated with the feeding hopper 22, and the first discharger 24 is arranged below the feeding hopper 22, so that the lower part of the feeding hopper 22 can be communicated with the storage section 6.

[0055] In this way, the adsorbent material can be introduced through the feeding pipe 23 and delivered into the feeding hopper, and the first discharger 24 is arranged to control the discharge of the feeding hopper 22, thereby controlling the falling of the adsorbent material into the storage section 6.

[0056] In an embodiment, the discharging mechanism 3 further comprises at least one of a discharging hopper 32, a second discharger 33 and a rotary valve 34.

[0057] It should be noted that in the present application, the discharging mechanism 3 further comprises a discharging hopper 32, a second discharger 33 and a rotary valve 34, wherein the discharging hopper 32 is located inside the discharging bin 31 and is communicated with the discharging section 8, the second discharger 33 is arranged below the discharging hopper 32, and the rotary valve 34 is arranged below the discharging bin 31.

[0058] In this way, the adsorbent material in the discharging section 8 falls due to gravity, which facilitates collection and temporary storage, reduces the possibility of material scattering or environmental pollution during discharge, and the second discharger 33 is arranged to control the discharge of the adsorbent material into the discharging bin 31, and the rotary valve 34 is arranged to control the opening and closing of the discharging bin 31, which facilitates the discharge of the adsorbent material and reduces the amount of air leakage.

[0059] In an embodiment, the adsorption section 7 is radially symmetrically distributed with three adsorption beds with the gas inlet 14 as the center point.

[0060] In this way, the exhaust gas can be more evenly distributed to each adsorption bed, thereby improving the adsorption efficiency and uniformity. At the same time, since the adsorption beds are symmetrically distributed, it is more convenient to operate and maintain, such as when replacing the adsorbent or cleaning, each adsorption bed can be accessed more easily, thereby saving time and labor costs.

[0061] In an embodiment, the adsorbent material comprises activated coke.

[0062] Thus, a large number of adsorption sites are provided by the porous structure of the active coke, which can effectively adsorb impurities and harmful substances in the exhaust gas, and the active coke has stable chemical properties and is not prone to chemical reaction with the adsorbed substances.

[0063] The above merely describes preferred embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made under the inventive concept of the present application, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A desulfurization apparatus characterized by comprising: The application relates to a desulfurization device. The device comprises a shell, a feeding port and a discharging port, and an air inlet and an air outlet, wherein the feeding port is arranged above the discharging port, the air inlet and the air outlet are arranged opposite to two sides of an adsorption bed, the shell is used to load adsorption material to form the adsorption bed, the feeding port and the air inlet and the air outlet are arranged above the shell and can be opened and closed, the feeding port can be communicated with the feeding port, and the discharging port is arranged below the shell and can be opened and closed. When waste gas is introduced into the air inlet, flows through the cavity and is discharged through the air outlet, the adsorption material in the feeding port can be discharged from the feeding port, enters the upper part of the cavity through the feeding port, and is discharged from the discharging port into the discharging port. The air inlet and / or the air outlet are vertically arranged on the side of the shell. The air inlet and the air outlet are arranged opposite to each other along the radial direction of the shell.

2. The desulfurizing apparatus according to claim 1, wherein A plurality of hole plates are arranged in the shell along the radial direction of the shell, and each hole plate is used to separate the cavity into a plurality of adsorption cavities. The plurality of adsorption cavities are arranged along the axis of the air inlet as a center point and in the up-down direction.

3. The desulfurizing apparatus according to claim 1, wherein The desulfurization device further comprises a protection mechanism, the protection mechanism comprises at least one nitrogen pipe, and the nitrogen pipe is arranged on at least one of the feeding port, the discharging port and the shell.

4. The desulfurizing apparatus according to claim 3, wherein The adsorption bed is sequentially arranged in the up-down direction and comprises a storage section, an adsorption section and a discharging section which are communicated with each other, the side of the storage section away from the adsorption section is communicated with the feeding port, and the side of the discharging section away from the adsorption section is communicated with the discharging port.

5. The desulfurizing apparatus as claimed in claim 1, wherein The feeding mechanism further comprises at least one of a feeding hopper, a feeding pipe and a first discharger.

6. The desulfurizing apparatus according to claim 1, wherein The discharging mechanism further comprises at least one of a discharging hopper, a second discharger and a rotary valve.

7. The desulfurizing apparatus according to claim 6, wherein The adsorption section is arranged as a center point of the air inlet and is symmetrically distributed along the up-down direction of the shell.

8. The desulfurizing apparatus according to claim 6, wherein The adsorption material comprises activated coke.

9. The desulfurizing apparatus according to claim 6, wherein ​ 10. The desulfurizing apparatus as claimed in claim 1, wherein ​

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