Feeding device of movable blast furnace gas desulfurization equipment

Abstract

The utility model discloses a feeding device of movable blast furnace gas desulfurization equipment, which comprises a feeding funnel positioned at the upper end of a shell, and is characterized by further comprising a feeding container communicated between the feeding funnel and the shell, a feeding upper switch valve is arranged between the feeding funnel and the feeding container, and a feeding lower switch valve is arranged between the feeding funnel and the feeding container. A feeding lower switch valve is arranged between the feeding container and the shell, a feeding gas replacement inlet provided with a switch is further formed in one side of the feeding container, and the feeding gas replacement inlet is connected with a safety gas source container through a safety gas access pipeline and a gas pump; and the other side of the feeding container is correspondingly provided with a feeding gas replacement outlet with a switch. According to the feeding device, air mingled in filler can be discharged before feeding, coal gas leaked in the feeding process is removed after feeding, the feeding safety is greatly improved, and stable operation of equipment is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace gas purification treatment, in particular to a feeding device of a mobile blast furnace gas desulfurization device. Background Technique

[0002] Blast furnace gas is a combustible gas by-produced in the process of blast furnace ironmaking. Its approximate composition is 6 - 22% carbon dioxide, 21 - 26% carbon monoxide, 1 - 4% hydrogen, 53 - 57% safety gas, 0.2 - 0.5% hydrocarbons and a small amount of sulfur-containing substances. It is a low-calorific-value gaseous fuel and can be used as self-use gas in metallurgical enterprises, such as gas for gas boilers, gas for hot blast stoves, heating hot-rolled steel ingots, preheating ladles, etc.

[0003] The composition of blast furnace gas is complex, and the flue gas generated after combustion as a fuel will contain a large amount of harmful components, so it needs to be treated before being discharged. Previously, the purification treatment of blast furnace gas mainly adopted the method of purifying the flue gas after combustion. This method of end purification treatment requires the installation of purification treatment equipment at each combustion point, which is extremely inconvenient and costly. Therefore, the current more common method is source control, that is, directly desulfurizing and purifying the blast furnace gas first to remove its harmful components, and then sending it to the location where combustion is required for combustion. This way of pre-concentrating the purification of blast furnace gas is more cost-effective and easier to control. The purified gas can be transported to any place where it is needed as fuel.

[0004] The centralized purification of blast furnace gas usually requires an advanced desulfurization purification process, that is, first removing the hydrogen chloride contained in the gas to avoid interfering with the subsequent hydrolysis reaction, then hydrolyzing the carbonyl sulfide in the gas to make it hydrolyze into hydrogen sulfide gas that is easy to process, and finally using absorption or adsorption methods to remove the harmful component gas mainly composed of hydrogen sulfide. For example, patents such as CN201910728476.X Ironmaking Blast Furnace Gas Environmental Protection Comprehensive Treatment System and Process, CN202110892639.5 A Blast Furnace Gas Step-by-Step Dry Acid Removal System and Method, etc. all achieve the treatment of blast furnace gas through a refined desulfurization treatment process similar to these three major steps.

[0005] In this existing three-step gas desulfurization technology, whether it is the step of removing hydrogen chloride, the step of carbonyl sulfide hydrolysis, or the final step of hydrogen sulfide adsorption, the treatment is basically carried out in a fixed bed manner, that is, the packing used for gas purification is laid on a breathable fixed bed, and then the gas is controlled to pass through the fixed bed and the packing, which has defects such as inconvenient packing replacement and low utilization rate.

[0006] In order to facilitate the replacement of fillers during coal gas desulfurization, there is also a moving bed structure in the prior art. For example, CN202011380864.2 has disclosed a moving bed type blast furnace gas desulfurization device and a desulfurization method thereof. The blast furnace gas desulfurization device comprises an outer shell, and a catalyst partition group is axially arranged inside the outer shell. The catalyst partition group comprises an inner ring partition member and an outer ring partition member coaxially nested from the inside to the outside, and the annular cavity formed between the inner ring partition member and the outer ring partition member is filled with a catalyst, and a feed port is provided at the top of the outer shell where the annular cavity is located; the cavity enclosed by the inner ring partition member is an exhaust channel, and the cavity between the outer ring partition member and the outer shell is an air intake channel, and an air intake interface connected to the air intake channel is provided at the bottom of the outer shell.

[0007] Compared with the traditional fixed bed packed tower, this method reduces the resistance inside the tower, and the moving bed method relatively improves the utilization rate of the catalyst and the desulfurization efficiency of blast furnace gas. However, the equipment will contain a large amount of oxygen when the packing is not treated during feeding. After feeding, the oxygen enters the reaction area and easily causes deflagration, which damages the equipment. At the same time, since the gas needs to pass through the packing to contact it during treatment, the packing will be mixed with gas, which will cause gas leakage from the inlet and outlet during the process of controlling the inlet and outlet of the packing, causing an impact. Therefore, there is still a defect of poor safety.

[0008] Therefore, how to improve the safety of the mobile coal gas desulfurization equipment during the feeding process has become a problem that needs to be considered and solved by technical personnel in this field. Utility Model Content

[0009] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the utility model is: how to provide a feeding device for a mobile blast furnace gas desulfurization equipment with better safety, so that it is particularly suitable for use in the fine desulfurization treatment process of blast furnace gas.

[0010] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0011] A feeding device for a mobile blast furnace gas desulfurization device comprises a feeding funnel located at the upper end of an outer shell, and is characterized in that it also comprises a feeding container connectedly arranged between the feeding funnel and the outer shell, an upper feeding switch valve is arranged between the feeding funnel and the feeding container, a lower feeding switch valve is arranged between the feeding container and the outer shell, a feeding gas replacement inlet equipped with a switch is also arranged on one side of the feeding container, the feeding gas replacement inlet is connected to a safety gas source container through a safety gas access pipeline and an air pump, and a feeding gas replacement outlet equipped with a switch is correspondingly arranged on the other side of the feeding container.

[0012] In this way, when feeding, the packing is first introduced into the feeding hopper. The lower feeding switch valve is in the closed state. The upper feeding switch valve is opened to allow the packing to enter the feeding container first, and then the upper feeding switch valve is closed. At this time, the inlet for gas displacement during feeding and the outlet for gas displacement during feeding are opened first, and a safety gas is introduced into the feeding container to squeeze out the air in the packing gap and discharge it through the outlet for gas displacement during feeding, and then the inlet for gas displacement during feeding and the outlet for gas displacement during feeding are closed. Then the lower feeding switch valve is opened, and the packing in the feeding container can flow downward by its own weight into the packing flow channel, realizing the automatic downward flow and replenishment of the packing, ensuring the mobile reaction treatment process. This can avoid the oxygen component in the air from entering the packing flow channel together with the packing, resulting in deflagration during the reaction and damaging the equipment, and improving the safety of equipment operation.

[0013] Furthermore, the safety gas is nitrogen, which has the advantages of low cost and good safety. Of course, other gases that do not react with coal gas, such as inert gases or carbon dioxide, can also be selected during implementation.

[0014] Furthermore, an oxygen sensor is also arranged at the position of the outlet for gas displacement during feeding and is connected to the control center.

[0015] In this way, the oxygen sensor can detect the oxygen content at the position of the displacement outlet. When the oxygen content is lower than the preset threshold (for example, 0.5%), it can be judged that the air has been discharged, which is convenient for accurately controlling and performing subsequent operations. During implementation, furthermore, the control center can be connected to and control the upper feeding switch valve, the lower feeding switch valve, the switches at the inlet for gas displacement during feeding and the inlet for gas displacement during feeding, and the air pump, so that the above detection and control process can be automated.

[0016] Furthermore, a carbon monoxide sensor is also designed at the position of the outlet for gas displacement during feeding and is connected to the control center.

[0017] In this way, after all the packing in the feeding container has been fed, before the next feeding, the lower feeding switch valve can be closed first, and the upper feeding switch valve remains closed. Then the inlet for gas displacement during feeding and the outlet for gas displacement during feeding are opened, and a safety gas is introduced into the feeding container to squeeze out the coal gas that overflows into the feeding container from the packing flow channel inside the housing and discharge it through the outlet for gas displacement during feeding. When the carbon monoxide sensor detects that the carbon monoxide concentration at the position of the outlet for gas displacement during feeding is lower than the preset value (for example, 0.5%), it can be judged that the coal gas has been discharged. At this time, the inlet for gas displacement during feeding and the outlet for gas displacement during feeding can be closed, and wait for the next feeding. In this way, it can well avoid the safety accident caused by the overflow of coal gas from the packing flow channel inside the housing during feeding.

[0018] Furthermore, the feed upper switch valve comprises two switch valves which are connected in series and arranged in parallel up and down, including a non-sealed switch valve located at the upper part and a sealed switch valve located at the lower part.

[0019] In this way, after the filler enters the feed container from the feed funnel, when closing the upper switch valve of the feed, the non-sealed switch valve can be closed first to quickly cut off the flow of the filler, and then the sealed switch valve can be closed. At the same time, when opening the upper switch valve, the sealed switch valve can be opened first, and then the non-sealed switch valve can be opened. In this way, it can be ensured that the sealed switch valve is not affected by the filler when closing and opening, so that it does not contact the filler as much as possible, and the sealing effect and durability are better guaranteed. During implementation, the non-sealed switch valve located at the top can be a plug valve or a butterfly valve, which is sensitive, fast and low-cost, and the sealed switch valve located at the bottom can be a ball valve or a blind plate valve to ensure a good sealing effect.

[0020] Furthermore, the feed lower switch valve comprises two switch valves which are connected in series and arranged in parallel up and down, including a flow regulating switch valve located at the top and a sealing switch valve located at the bottom.

[0021] In this way, when the feed container feeds into the packing flow channel, the flow regulating switch valve can be used to adjust the speed of the feed to match the gas flow, ensuring that the reaction treatment effect can be ensured even when the gas flow fluctuates. At the same time, when sealing is required, the sealing switch valve can be used to achieve sealing and minimize contact with the packing, thereby better ensuring the sealing effect and durability.

[0022] During implementation, there can be one feeding device disposed at the center of the upper end of the shell, or there can be multiple feeding devices evenly arranged at the upper end of the shell along the circumferential direction.

[0023] In addition, during implementation, a feed retention container and a filler flow channel can be further connected in series between the lower part of the feed container and the outer shell. This is because the structure and function of the aforementioned feeding device is to realize batch feeding to remove oxygen mixed in the feed and ensure the sealing effect of the feed. Therefore, after adding another feed retention container, the filler first enters the feed retention container and accumulates, and the feed retention container can be used to realize uninterrupted continuous feeding inside the filler channel to avoid the impact of feeding stopping during the air removal process on the reaction. Furthermore, a flow regulating valve is set between the feed retention container and the outer shell and connected to the control center, so that the feed flow rate can be controlled as needed.

[0024] Therefore, in summary, the feeding device of the present application can discharge the air entrained in the filler before feeding, and remove the gas leaked during the feeding process after feeding, which greatly improves the safety of feeding and ensures the stable operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a mobile blast furnace gas desulfurization device adopting the feeding device structure of the present utility model. The arrow in the figure indicates the gas flow direction in the gas flow channel.

[0026] Figure 2 It is Figure 1 a schematic cross-sectional structure diagram of the outer shell in

[0027] Figure 3 When implemented, when the long supporting ring plate is composed of multiple single-piece spliced ring plates, it is a schematic structural diagram of a single piece of a single ring plate.

[0028] Figure 4 When implemented, it is a schematic diagram when the feeding device structure of the present utility model is applied to a mobile blast furnace gas desulfurization device with other structural forms.

[0029] Figure 5 When implemented, it is a schematic diagram when the feeding device structure of the present utility model is used in a blast furnace gas fine desulfurization system. Specific embodiments

[0030] The present utility model will be further described in detail below in conjunction with a mobile blast furnace gas desulfurization device adopting the structure of the present utility model.

[0031] Embodiment 1: A mobile blast furnace gas desulfurization device adopting the structure of the present utility model, see Figures 1-3 , which includes an outer shell 1 arranged vertically as a whole. Inside the outer shell 1, a packing flow channel 2 is arranged vertically. At the upper end of the outer shell 1, a feeding device is arranged and connected to the upper end of the packing flow channel 2. At the lower end of the outer shell 1, a discharging device is arranged and connected to the lower end of the packing flow channel 2. A gas flow channel 3 is also arranged inside the outer shell. An air inlet interface 4 is arranged at the lower end part of the outer shell and connected to the gas flow channel 3. An air outlet interface 5 is arranged at the upper end part of the outer shell and connected to the gas flow channel 3. Its characteristic is that the gas flow channel 3 is arranged as a whole to zigzag upward from below and repeatedly horizontally penetrate through the packing flow channel.

[0032] In this way, the packing in the device can be fed from the feeding device, then flow downward along the packing flow channel by its own weight and react with the coal gas to achieve purification treatment, and then be discharged from the discharging device. This facilitates the replacement and update of the packing and realizes mobile desulfurization treatment. Moreover, compared with a moving bed type blast furnace gas desulfurization device disclosed in CN202011380864.2. In this solution, the coal gas flow channel is designed to be arranged horizontally and repeatedly from the bottom to the top in a zigzag manner through the packing flow channel. The coal gas (the coal gas in this application refers to blast furnace gas) gradually passes through the packing at the lower and less effective positions to the packing at the upper and more effective positions in multiple times, and repeatedly interacts with the packing to achieve reaction (adsorption reaction or hydrolysis reaction) treatment. Therefore, the defect that the overall treatment effect deteriorates due to the uneven treatment effect at the upper and lower positions of the packing is overcome, and the purpose of sufficient reaction between the coal gas and the packing is achieved. Moreover, in this way, before the packing falls out from the discharging device, it contacts the freshly entering coal gas at the lowermost final position, which better ensures that the packing reaches the maximum utilization efficiency before falling out; and before the coal gas enters the gas outlet interface and is discharged at the upper end, it also contacts the freshly entering packing at the final position, which also better ensures that the maximum treatment effect on the coal gas is achieved. Therefore, this method greatly improves the reaction effect between the packing and the coal gas, ensures the utilization rate of the packing, and avoids the waste of the packing.

[0033] In this embodiment, the outer shell 1 is integrally in the shape of a vertical cylinder. Inside the outer shell 1, an inner ring partition 6 and an outer ring partition 7, both of which are integrally in the shape of a vertical cylinder, are coaxially and spaced at the middle position. The inner ring partition 6 and the outer ring partition 7 are each provided with air-permeable holes with diameters smaller than the diameter of the packing particles. A packing flow channel 2 is formed between the inner ring partition and the outer ring partition. The inner space of the inner ring partition 6 forms an internal coal gas area, and the outer space of the outer ring partition 7 forms an external coal gas area. Impermeable horizontal partitions 8 are alternately arranged upward in the internal coal gas area and the external coal gas area. The horizontal partitions 8 divide the corresponding internal coal gas area and external coal gas area into multiple coal gas residence chambers. The lowermost coal gas residence chamber is connected to the air inlet interface 4, and the uppermost coal gas residence chamber is connected to the air outlet interface 5, and communication is formed between each coal gas residence chamber and the packing flow channel to form a coal gas flow channel 3 that zigzags upward repeatedly inside and outside.

[0034] In this way, after the packing enters the packing flow channel from the feeding device, it flows evenly downward along the periphery by its own weight; after the gas enters the gas flow channel, it continuously contacts the packing in the packing flow channel during the process of rising repeatedly inside and outside, realizing repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the packing. The treated gas is discharged upward, and the reacted packing is discharged downward. At the same time, compared with the way of using a rectangular structure packing flow channel, this kind of packing flow channel with a cylindrical structure enables the packing and the gas flow to be in more sufficient contact and the reaction to be more efficient under the condition of the same space size; meanwhile, there are no corner positions in the circular structure that cause stress concentration and insufficient gas flow, which can make the force and the gas flow more balanced and stable everywhere, ensuring the reliability of the equipment.

[0035] Among them, the upper and lower ends of the outer ring partition 7 are connected and fixed to the housing 1, and the inner ring partition 6 is supported and fixed on the outer ring partition by a horizontally arranged connecting rod (not shown in the figure). This better ensures the stability and reliability of the support.

[0036] Among them, the gas residence chambers connected to the gas inlet interface 4 and the gas residence chambers connected to the gas outlet interface are both located in the external gas area. In this way, the connection of the gas inlet and outlet structure is simpler and the setting is more convenient.

[0037] Among them, a ring-shaped air distribution chamber 9 is also arranged around the periphery of the gas residence chamber connected to the gas inlet interface 4. The gas inlet interface is communicated with the air distribution chamber 9, and a plurality of openings are evenly distributed along the circumferential direction on the air distribution chamber 9 and are connected to the corresponding gas residence chambers.

[0038] In this way, uniform gas distribution in the circumferential direction can be realized during gas inlet, so that after the gas enters, it can pass through the packing flow channel more evenly in the circumferential direction and enter the internal gas area, avoiding imbalance caused by gas inlet in one direction.

[0039] In addition, during implementation, a ring-shaped gas collection chamber 39 is also arranged around the periphery of the gas residence chamber connected to the gas outlet interface 5. The gas outlet interface is communicated with the gas collection chamber 39, and a plurality of openings are evenly distributed along the circumferential direction on the gas collection chamber 39 and are connected to the corresponding gas residence chambers.

[0040] In this way, a gas collection chamber with a similar structural principle to the air distribution chamber is also set at the gas outlet interface, better ensuring the stable balance of gas flow and air pressure distribution.

[0041] Among them, a supporting device is also arranged in the packing flow channel. The supporting device includes a supporting ring plate horizontally arranged along the circumferential direction of the packing flow channel. The supporting ring plate is integrally in a conical ring shape. One side (inner side or outer side) of the supporting ring plate is connected to the side wall of the packing flow channel, and the other side is suspended obliquely downward.

[0042] In this way, the setting of the supporting ring plate plays a certain supporting role for the upper packing on the basis of not affecting the downward flow of the packing, avoiding excessive pressure on the lowermost packing in the packing flow channel and preventing it from being broken, which may affect the reaction effect and the quality of the discharged gas.

[0043] Among them, the supporting device includes a long supporting ring plate 10 (referring to the dimension in the width direction is greater than that of the short supporting ring plate) and a short supporting ring plate 11, which are respectively fixedly arranged on the inner and outer side walls of the packing flow channel. The suspended ends of the long supporting ring plate 10 and the short supporting ring plate 11 are arranged obliquely opposite and staggered at intervals.

[0044] In this way, there are positions for upward supporting force on the entire cross-section of the packing flow channel, avoiding missing or leaking openings, ensuring the balance and stability of the upward support, thus ensuring the uniformity of the downward flow of the packing and the stability of the desulfurization reaction.

[0045] Among them, multiple groups of supporting devices are arranged along the height direction in the packing flow channel. This can extend the height of the packing flow channel and the shell as much as possible, improving the treatment effect.

[0046] Among them, a group of supporting devices is correspondingly arranged at the height position corresponding to each horizontal partition plate 8.

[0047] This can also prompt the gas to pass through the packing flow channel as much as possible in the horizontal direction, ensuring that the gas repeatedly passes through the packing area horizontally and then upward, forming a sufficiently long gas flow path and better ensuring the treatment effect.

[0048] Among them, in any two adjacent groups of supporting devices up and down, the inner and outer positions of the long supporting ring plate 10 and the short supporting ring plate 11 are set to be opposite. In this way, it better ensures the overall balance of the supporting force during the downward flow of the packing.

[0049] During implementation, the supporting device can be further improved as follows. In the supporting device, the long supporting ring plate is arranged below the short supporting ring plate, and the long supporting ring plate is composed of multiple fan-shaped single ring plates 12 evenly distributed in the circumferential direction. See Figure 3 , the upper ends of the single ring plates 12 are hinged and installed on the inner side wall of the packing flow channel, and the lower parts of the single ring plates 12 are supported and connected to the corresponding inner side wall of the packing flow channel through support springs 13.

[0050] This is because the gas treatment in this scheme is a dynamic process, and the gas flow rate may fluctuate. When the gas flow rate is large, the feeding speed of the filler can be adjusted accordingly to ensure the reaction treatment effect, but the fixed support ring plate will hinder the flow rate adjustment of the filler. Therefore, in this scheme, the long support ring plate is further set below the short support ring plate, and it is evenly broken along the circumference and set as a rotatable elastic support structure. In this way, when the downward flow rate of the filler accelerates, the support ring plate will automatically rotate downward due to the increased force, so that its own supporting force becomes smaller, and at the same time, the gap distance between the long support ring plate and the short support ring plate is automatically increased, which is more conducive to the downward flow of the filler and facilitates the adjustment and control of the filler flow rate to better ensure the treatment effect.

[0051] Wherein, the support spring is a coil spring and is made of shape memory alloy material.

[0052] This is because the reaction of coal gas in the packing channel is a dynamic process, coupled with the temperature of the coal gas itself and the heat released by the reaction, the temperature in the packing channel usually fluctuates within a temperature range (the reaction temperature range usually fluctuates around 100℃±50℃). A high temperature indicates a relatively violent reaction, and a low temperature indicates a relatively gentle reaction. Therefore, after the support spring is designed as a memory alloy material, in addition to its own spring function, it can adjust and increase the gap distance between the long support ring plate and the short support ring plate under stress. It can also sense the temperature. When the temperature increases (indicating a violent reaction), it shrinks through its own deformation, actively drives the long support ring plate to rotate downward, increases the gap distance between the long support ring plate and the short support ring plate, reduces obstacles, and increases the rate of downward flow of the packing, achieving the effect of active adjustment.

[0053] Among them, the support spring is formed by connecting multiple sections of different shape memory alloy materials in the length direction, the length of each section of the shape memory alloy material is gradually increased, and the deformation temperature of each section of the shape memory alloy material is gradually increased within the reaction temperature range inside the filler flow channel.

[0054] In this way, graded regulation can be achieved within the reaction fluctuation temperature range. The more intense the reaction and the higher the temperature, the greater the active contraction of the support spring, so that the downward flow rate of the filler more accurately matches the degree of filler reaction.

[0055] The upper end of the long support ring plate 12 is rotatably mounted in a mounting groove on the inner wall of the filler flow channel, and a flexible sealing skin 14 is connected and arranged around the long support ring plate 12 and between the corresponding inner wall of the filler flow channel.

[0056] In this way, a flexible seal is achieved on the inner side of the long supporting ring plate, preventing the upper end hinge and the lower supporting spring from failing due to material inclusions, thereby ensuring the stability of the device operation.

[0057] Among them, the feeding device includes a feeding funnel 15 located at the upper end of the outer shell, and further includes a feeding container 16 communicatively arranged between the feeding funnel and the outer shell 1. A feeding upper switching valve 17 is arranged between the feeding funnel 15 and the feeding container 16, a feeding lower switching valve 18 is arranged between the feeding container and the outer shell, and a feeding gas replacement inlet 19 equipped with a switch (not shown in the figure) is further arranged on one side of the feeding container. The feeding gas replacement inlet is connected to a safety gas source container (not shown in the figure) through a safety gas access pipeline and an air pump. A feeding gas replacement outlet 20 equipped with a switch (not shown in the figure) is correspondingly arranged on the other side of the feeding container 16.

[0058] In this way, when feeding, the filler is first introduced into the feeding funnel. The feeding lower switching valve is in a closed state. The feeding upper switching valve is opened to allow the filler to enter the feeding container first, and then the feeding upper switching valve is closed. At this time, the feeding gas replacement inlet and the feeding gas replacement outlet are first opened, and safety gas is introduced into the feeding container to squeeze out the air in the filler gap and discharge it through the feeding gas replacement outlet, and then the feeding gas replacement inlet and the feeding gas replacement outlet are closed. Then the feeding lower switching valve is opened, and the filler in the feeding container can flow downward into the filler flow channel by its own weight, realizing the automatic downward flow and replenishment of the filler, ensuring the mobile reaction treatment process. This can avoid the oxygen component in the air from entering the filler flow channel together with the filler, resulting in deflagration during the reaction and damaging the equipment, and improving the safety of the equipment operation.

[0059] Among them, the safety gas is nitrogen, which has the advantages of low cost and good safety. Of course, other gases that do not react with coal gas, such as inert gases or carbon dioxide, can also be selected during implementation.

[0060] Among them, an oxygen sensor is also arranged at the position of the feeding gas replacement outlet 20 and is connected to a control center (not shown in the figure).

[0061] In this way, the oxygen sensor can detect the oxygen content at the position of the replacement outlet. When the oxygen content is lower than a preset threshold (for example, 0.5%), it can be judged that the air has been discharged, which is convenient for accurately controlling and performing subsequent operations. During implementation, the control center can be connected to and control the feeding upper switching valve, the feeding lower switching valve, the switches at the feeding gas replacement inlet and the feeding gas replacement inlet, and the air pump, so as to realize the automation of the above detection and control process.

[0062] Among them, a carbon monoxide sensor is also designed at the position of the feeding gas replacement outlet 20 and is connected to a control center (not shown in the figure).

[0063] In this way, when all the fillers in the feed container are fed, before the next feeding, the lower feed switch valve can be closed first, the upper feed switch valve can be kept in a closed state, and then the feed gas replacement inlet and feed gas replacement outlet are opened, and the safety gas is introduced into the feed container, and the coal gas overflowing from the filler flow channel inside the shell into the feed container is squeezed out and discharged through the feed gas replacement outlet. When the carbon monoxide sensor detects that the carbon monoxide concentration at the feed gas replacement outlet is lower than the preset value (for example, 0.5%), it can be determined that the coal gas has been discharged. At this time, the feed gas replacement inlet and feed gas replacement outlet can be closed, waiting for the next feeding. In this way, it is possible to well avoid the coal gas in the filler flow channel inside the shell from overflowing during feeding to cause a safety accident.

[0064] During implementation, the feed gas replacement outlet is connected to an external pipeline and discharged to high altitude. In this way, when the feed gas replacement outlet is used to discharge air, it can be directly discharged to the outside, and when the gas is discharged, the amount is very small, so it can be discharged to high altitude without affecting the ground staff.

[0065] The feed upper switch valve 17 comprises two switch valves 17 which are connected in series and arranged in parallel, including a non-sealed switch valve located at the upper part and a sealed switch valve located at the lower part.

[0066] In this way, after the filler enters the feed container from the feed funnel, when closing the upper switch valve of the feed, the non-sealed switch valve can be closed first to quickly cut off the flow of the filler, and then the sealed switch valve can be closed. At the same time, when opening the upper switch valve, the sealed switch valve can be opened first, and then the non-sealed switch valve can be opened. In this way, it can be ensured that the sealed switch valve is not affected by the filler flow channel when closing and opening, so that it is not in contact with the filler as much as possible, and the sealing effect and durability are better guaranteed. During implementation, the non-sealed switch valve located at the top can be a plug valve or a butterfly valve, which is sensitive, fast and low-cost, and the sealed switch valve located at the bottom can be a ball valve or a blind plate valve to ensure a good sealing effect.

[0067] The feed lower switch valve 18 comprises two valves which are connected in series and arranged in parallel, including a flow regulating switch valve located at the upper part and a sealing switch valve located at the lower part.

[0068] In this way, when the feed container feeds into the packing flow channel, the flow regulating switch valve can be used to adjust the speed of the feed to match the gas flow, ensuring that the reaction treatment effect can be ensured even when the gas flow fluctuates. At the same time, when sealing is required, the sealing switch valve can be used to achieve sealing and minimize contact with the packing, thereby better ensuring the sealing effect and durability.

[0069] During implementation, the feeding device can be one and set at the center of the upper end of the outer shell, or multiple ones and evenly arranged circumferentially at the upper end of the outer shell.

[0070] In addition, during implementation, a feeding residence container 27 is connected in series between the lower part of the feeding container 16 and the outer shell 1 and communicated with the packing flow channel. This is because the structure and function of the aforementioned feeding device are to achieve batch feeding to remove the oxygen mixed in the feed and ensure the sealing effect of the feed. Therefore, after adding another feeding residence container, the packing first enters the feeding residence container and accumulates, and the feeding residence container can achieve continuous feeding of the inside of the packing channel without interruption, avoiding the impact on the reaction caused by the stop of feeding during the air removal process. Among them, a flow regulating valve 28 is arranged between the feeding residence container and the outer shell and connected to the control center, so that the feeding flow rate can be controlled as needed.

[0071] Among them, the discharging device includes a discharging container 21 communicated with the packing flow channel and arranged below the outer shell. The lower end of the discharging container is provided with a discharging port 22 downward. A discharging upper switching valve 23 is arranged between the discharging container and the outer shell. A discharging lower switching valve 24 is arranged between the discharging container and the discharging port. A discharging gas replacement inlet 25 with a switch is also arranged on one side of the discharging container. The discharging gas replacement inlet 25 is connected to a safety gas source container through a safety gas access pipeline and an air pump (not shown in the figure). A discharging gas replacement outlet 26 with a switch is correspondingly arranged on the other side of the discharging container.

[0072] In this way, when discharging, the discharging lower switching valve is in the closed state, and the discharging upper switching valve is opened to allow the inactivated packing after the reaction to first enter the discharging container. When the packing accumulated in the discharging container is almost full, the discharging upper switching valve is closed, and then the discharging gas replacement inlet and the discharging gas replacement outlet are first opened to introduce safety gas into the discharging container, extrude the coal gas mixed in the packing gap and discharge it through the discharging gas replacement outlet. Then the discharging gas replacement inlet and the discharging gas replacement outlet are closed. Then the discharging lower switching valve is opened, and the packing in the discharging container can flow out of the device by its own weight to achieve discharging. This can avoid the leakage of the coal gas mixed in the inactivated packing and improve the safety of the equipment operation.

[0073] Among them, the safety gas is nitrogen. It has the advantages of low cost and good safety. Of course, during implementation, other gases that do not react with coal gas can also be selected, such as inert gases or carbon dioxide.

[0074] Among them, a carbon monoxide sensor is also arranged at the position of the discharging gas replacement outlet 26 and connected to the control center (not shown in the figure).

[0075] In this way, a carbon monoxide sensor can be relied on to detect the carbon monoxide concentration at the outlet position of the gas replacement for discharging materials. When the concentration is lower than a preset value (for example, 0.5%), it can be determined that the gas in the discharging container has been replaced and discharged completely, which is convenient for precise control to perform subsequent operations. Among them, the control center can be connected to and control the upper discharge switch valve, the lower discharge switch valve, the inlet of the gas replacement for discharging materials, the switch at the inlet of the gas replacement for discharging materials, and the air pump, so as to realize the automation of the above detection and control process.

[0076] Among them, an oxygen sensor is also arranged at the position of the outlet 26 of the gas replacement for discharging materials and is connected to the control center (not shown in the figure).

[0077] In this way, after the deactivated packing in the discharging container is discharged, before the next discharging, the lower discharge switch valve can be closed first, and the upper discharge switch valve can be kept in the closed state. Then, the inlet and outlet of the gas replacement for discharging materials are opened, and a safety gas is introduced into the discharging container to squeeze out the air inside and discharge it through the outlet of the gas replacement for discharging materials. During the exhaust process, the oxygen sensor is relied on to detect the exhaust effect. When the oxygen content is lower than a preset threshold (for example, 0.5%), it can be determined that the air has been discharged, which is convenient for precise control to perform subsequent operations. In this way, it is avoided that air enters the packing flow channel in the housing from the discharging device during the next discharging, resulting in deflagration during the reaction and damaging the equipment, thus improving the safety of the equipment operation.

[0078] During implementation, the outlet of the gas replacement for discharging materials is externally connected to a pipeline and discharged to a high altitude. In this way, when the outlet of the gas replacement for discharging materials discharges air, it can be directly discharged. When it discharges gas, since the amount is very small, discharging it to a high altitude does not affect the ground staff.

[0079] Among them, there are two upper discharge switch valves arranged in series and side by side up and down, including a flow regulating switch valve located above and a sealing switch valve located below.

[0080] In this way, the flow rate regulating switch valve can be used to adjust the discharging speed of the packing flow channel into the discharging container, making it correspond to and match the flowing speed of the packing in the packing flow channel, ensuring that the flowing speed of the packing matches the gas flow rate and guaranteeing the reaction effect. At the same time, when the deactivated packing enters the discharging container completely, when closing the upper discharging switch valve, the flow rate regulating switch valve can be closed first to quickly cut off the flow of the packing, and then the sealing switch valve can be closed. When continuing to discharge later, the sealing switch valve is opened first and then the flow rate regulating switch valve is opened. In this way, it can be ensured that the sealing switch valve is not affected by the flowing of the packing when closing and opening, minimizing its contact with the packing as much as possible, and better guaranteeing the sealing effect and durability. During implementation, the non-sealing switch valve located above can be a gate valve or a butterfly valve, which is sensitive, fast, and low-cost in response, and the sealing switch valve located below can be a ball valve or a blind plate valve to ensure a good sealing effect.

[0081] Among them, there are two discharging lower switch valves 24 arranged in series and side by side up and down, including a non-sealing switch valve located above and a sealing switch valve located below.

[0082] In this way, when the discharging lower switch valve is opened, the sealing switch valve is opened first and then the non-sealing switch valve is opened. When the discharging lower switch valve is closed, the non-sealing switch valve is closed first and then the sealing switch valve is closed. In this way, it is ensured that the feeding of the sealing switch valve does not contact the packing, guaranteeing that the opening and closing of the sealing switch valve are not affected by the flowing of the packing, and ensuring the reliability and durability of its sealing.

[0083] In addition, during implementation, a discharging residence container 29 is also connected in series between the upper part of the discharging container 21 and the outer shell 1 and is communicated with the packing flow channel. This is because the structure and function of the aforementioned discharging device are to achieve batch discharging to remove the gas mixed in the discharging and ensure the sealing effect of the discharging. Therefore, after adding another discharging residence container, when the deactivated packing is discharged, it first enters the discharging residence container and accumulates. The discharging residence container can achieve continuous discharging of the inside of the packing channel without interruption, avoiding the impact on the reaction caused by the stop of discharging during the process of removing the gas mixed in the discharging. Among them, a flow rate regulating valve 30 is arranged between the discharging residence container 29 and the outer shell 1 and is connected to the control center, so that the discharging flow rate can be controlled as needed.

[0084] During implementation, the feeding device structure of the present utility model can also be applied to other structures of mobile blast furnace gas desulfurization equipment. For example, it can be applied to a moving bed type blast furnace gas desulfurization device disclosed in CN202011380864.2 described in the background technology. Another example is that it can also be applied to Figure 4 the shown mobile blast furnace gas desulfurization equipment, Figure 4The shown mobile blast furnace gas desulfurization equipment, compared with the outer shell structure in Embodiment 1, the difference is only that the outer shell 31 and the packing area 32 inside it are rectangular, and the supporting plate in the corresponding supporting device 33 is adjusted to the corresponding rectangular structure. The structures of the remaining feeding device 34 and discharging device 35 can be kept the same as those in Embodiment 1 and will not be elaborated here.

[0085] Specifically, referring to Figure 4 , the outer shell 31 in the shown mobile blast furnace gas desulfurization equipment is in an overall rectangular body structure. At least one packing area 32 is arranged in the middle position of the outer shell 31 along the width direction. The upper end of the packing area 32 is connected to the feeding device 34, and the lower end is connected to the discharging device 35 to form a packing flow channel inside. On the left and right sides of the packing area 32, breathable vertical partitions are respectively arranged, and a gas area 36 is formed inside the outer shell outside the vertical partitions. Impermeable horizontal partitions 37 are alternately arranged upward in the gas areas on both sides. The horizontal partitions divide the corresponding gas areas into multiple gas residence chambers. The lowermost gas residence chamber is connected to the intake interface, and the uppermost gas residence chamber is connected to the outlet interface, and communication is formed between each gas residence chamber and the packing area to form a gas flow channel in an overall S shape.

[0086] In this way, the inner cavity of the outer shell is divided into a rectangular packing area and a gas area by the breathable vertical partitions. A packing flow channel is formed in the packing area, and an S-shaped gas flow channel that can penetrate the packing area is formed in the gas area by the alternately rising horizontal partitions. After the gas enters the gas flow channel, it continuously contacts the packing in the packing area during the process of rising along the S shape, realizing repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the packing. The treated gas is discharged upward, and the reacted packing is discharged downward. Therefore, compared with the cylindrical structure, while improving the utilization efficiency of the packing, it has the advantages of simpler structure and more convenient implementation. Among them, breathable holes with pore diameters smaller than the diameter of the packing particles are uniformly arranged on the vertical partitions to maintain the breathable effect.

[0087] In addition, during implementation, the present utility model can also be applied to Figure 5A fine desulfurization system for blast furnace gas as shown includes three series-connected mobile blast furnace gas desulfurization devices. In the first mobile blast furnace gas desulfurization device, the packing uses hydrogen chloride adsorbent packing to form a chlorine removal device. In the second mobile blast furnace gas desulfurization device, the packing uses carbonyl sulfide hydrolysis catalyst packing to form a hydrolysis device. In the third mobile blast furnace gas desulfurization device, the packing uses desulfurization adsorbent packing to form a desulfurization device. The gas outlet interface of the first mobile blast furnace gas desulfurization device is connected to the gas inlet interface of the second mobile blast furnace gas desulfurization device, and the gas outlet interface of the second mobile blast furnace gas desulfurization device is connected to the gas inlet interface of the third mobile blast furnace gas desulfurization device to achieve series connection. In the three mobile blast furnace gas desulfurization devices, the structures of multiple feeding devices are provided.

[0088] In this way, by using three devices in series and respectively using different packings to react and treat the gas, fine desulfurization of the gas is achieved.

Claims

1. A feeding device for a mobile blast furnace gas desulfurization device, comprising a feeding funnel located at the upper end of a housing, characterized in that: It also includes a feed container connected between the feed funnel and the outer shell, an upper feed switch valve is arranged between the feed funnel and the feed container, a lower feed switch valve is arranged between the feed container and the outer shell, and a feed gas replacement inlet equipped with a switch is also arranged on one side of the feed container. The feed gas replacement inlet is connected to the safety gas source container through a safety gas access pipeline and an air pump, and a feed gas replacement outlet equipped with a switch is correspondingly arranged on the other side of the feed container.

2. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: The safety gas is nitrogen.

3. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: An oxygen sensor is also provided at the outlet of the feed gas replacement and is connected to the control center.

4. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: The outlet for feed gas replacement is also designed with a carbon monoxide sensor connected to the control center.

5. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: The feed upper switch valve comprises two upper and lower switch valves which are connected in series and arranged in parallel, including a non-sealed switch valve located at the upper part and a sealed switch valve located at the lower part.

6. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 5, characterized in that: The feed lower switch valve comprises two valves which are connected in series and arranged in parallel, including a flow regulating switch valve located at the upper part and a sealing switch valve located at the lower part.

7. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: A feed retention container is connected in series between the lower part of the feed container and the shell and is communicated with the filler flow channel.

8. The feeding device of the mobile blast furnace gas desulfurization equipment according to claim 7, characterized in that: A flow regulating valve is arranged between the feed retention container and the shell and is connected to the control center.

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