Movable blast furnace gas desulfurization equipment and fine desulfurization system

Abstract

The utility model discloses movable blast furnace gas desulfurization equipment which comprises a shell which is vertically arranged on the whole, a filler flow channel is vertically arranged in the shell, a feeding device is arranged at the upper end of the shell and connected with the upper end of the filler flow channel, a discharging device is arranged at the lower end of the shell and connected with the lower end of the filler flow channel, and a gas flow channel is further arranged in the shell. The lower end part of the shell is provided with a gas inlet interface which is connected with the coal gas flow channel, and the upper end part of the shell is provided with a gas outlet interface which is connected with the coal gas flow channel. The utility model further discloses a blast furnace gas fine desulfurization system obtained by connecting three devices in series. The device has the advantages of high desulfurization treatment efficiency, high filler utilization rate, more convenient control of the reaction process, better safety and the like.

Description

Technical Field

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

[0002] Blast furnace gas is a combustible gas produced as a byproduct in the blast furnace ironmaking process. Its main components are 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 gas fuel that can be used for self-use gas in metallurgical enterprises, such as gas for gas boilers, hot blast furnaces, heating hot-rolled steel ingots, preheating ladles, etc.

[0003] The composition of blast furnace gas is complex. The flue gas produced after it is burned as fuel will contain a large amount of harmful components, so it needs to be treated before it can be discharged. In the past, blast furnace gas purification was more of a treatment method for purifying the flue gas after combustion. This terminal purification method requires the installation of purification equipment at each combustion point, which is extremely inconvenient and costly. Therefore, the source control method is now more commonly used, that is, the blast furnace gas is directly desulfurized and purified to remove its harmful components, and then sent to the location where it needs to be burned for combustion. This method of centralized purification of blast furnace gas in advance is cheaper and more convenient to control, and the purified gas can be transported to any place where it is needed for use as fuel.

[0004] Centralized purification of blast furnace gas usually requires the use of a fine desulfurization purification process, that is, first remove the hydrogen chloride contained in the gas to avoid interference with the subsequent hydrolysis reaction, and then hydrolyze the carbonyl sulfide in the gas to hydrolyze it into hydrogen sulfide gas that is easy to handle, and finally remove the harmful component gas mainly composed of hydrogen sulfide by absorption or adsorption. For example, CN201910728476.X Ironmaking blast furnace gas environmental protection comprehensive management system and process, CN202110892639.5 A blast furnace gas step-by-step dry deacidification system and method and other patents are similar to this fine desulfurization treatment process that is divided into three steps to achieve blast furnace gas management. However, in these existing gas desulfurization technologies, whether it is the step of removing hydrogen chloride, the step of hydrolyzing carbonyl sulfide, or the final step of hydrogen sulfide adsorption, the treatment is basically carried out in a fixed bed manner, that is, the filler 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 filler.

[0005] This treatment method of fixed adsorption bed has the following defects. 1 After the filler loses its activity after being used for a period of time, the whole machine needs to be shut down before the filler can be replaced, which is extremely inconvenient and affects production. 2 Whether the filler needs to be replaced is determined by detecting whether the content of harmful components in the outlet gas exceeds the specified content ratio. After exceeding the specified content, the filler usually needs to be replaced. However, it is found in actual production that when the content of harmful components in the outlet gas exceeds the limit, the replaced filler actually retains most of its activity and still has a strong treatment effect. Therefore, the existing method has the defect of very low filler utilization efficiency, which will cause a huge waste of filler. 3 In the existing treatment method, since the filler is used in a fixed stack, its usage status cannot be adjusted on the spot, so the treatment efficiency cannot be adjusted according to needs.

[0006] CN202011380864.2 has disclosed a moving bed type blast furnace gas desulfurization device and a desulfurization method thereof, wherein the blast furnace gas desulfurization device comprises a shell, wherein a catalyst partition group is arranged axially inside the shell, wherein the catalyst partition group comprises an inner ring partition member and an outer ring partition member coaxially nested from inside to outside, wherein 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 shell where the annular cavity is located; the cavity surrounded by the inner ring partition member is an exhaust channel, and the cavity between the outer ring partition member and the shell is an air intake channel, and an air intake interface connected to the air intake channel is provided at the bottom of the shell. 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 improves the desulfurization efficiency of blast furnace gas. However, the following defects still exist. 1 The gas to be treated directly passes through the catalyst area from the cavity between the shell and the outer ring partition member of the catalyst area inward, that is, enters the internal exhaust channel. In this way, if the catalyst adopts a continuous flow setting of feeding and discharging, the reaction effect of the lower catalyst packing will be poor, while the reaction effect of the upper packing will be good. However, the coal gas passes through the catalyst from both the lower and upper areas at the same time, which leads to an unbalanced reaction treatment effect at the upper and lower positions and reduces the overall treatment effect. In this case, to ensure that the final gas content meets the standard, the flow rate of the packing can only be accelerated, that is, the lower packing must be discharged from the packing area before it has time to completely react, otherwise it is difficult to ensure the treatment effect of part of the gas passing through the packing area from the lower position. Therefore, it will still lead to a large amount of waste of packing. 2 The packing flows downward by its own weight, which is difficult to control; at the same time, to ensure that the coal gas can pass through the packing, the thickness of the packing area cannot be set too thick. In this way, the height of the packing area can only be increased to improve the treatment efficiency. However, after the height of the packing area is increased, the packing particles at the bottom are easily crushed and collapsed under the weight of the upper packing. The crushed packing powder not only affects the air permeability effect but also falls into the coal gas to affect the inlet and outlet gas. 3. The equipment will contain a lot of oxygen when the filler is not processed during feeding. After feeding, oxygen will enter the reaction area and easily cause explosion and damage the equipment. At the same time, because the coal gas needs to pass through the filler to contact it during processing, the filler will contain coal gas. In this way, the process of controlling the filling in and out will also cause coal gas to leak from the inlet and outlet, causing impact. Therefore, there is also a defect of poor safety.

[0007] Therefore, how to design a blast furnace gas desulfurization solution that uses the moving bed principle to improve the desulfurization treatment efficiency, while also being able to better improve the filler reaction effect, improve the filler utilization rate, make the reaction process more convenient to control, and have better safety has become a problem that technical personnel in this field need to consider and solve. Utility Model Content

[0008] 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 mobile blast furnace gas desulfurization equipment and a fine desulfurization system with high desulfurization treatment efficiency, high filler utilization rate, more convenient reaction process control and better safety, so that it is particularly suitable for use in the fine desulfurization treatment process of blast furnace gas.

[0009] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0010] A mobile blast furnace gas desulfurization equipment comprises an outer shell which is arranged vertically as a whole, a packing flow channel is arranged vertically inside the outer shell, a feeding device is arranged at the upper end of the outer shell and connected to the upper end of the packing flow channel, a discharging device is arranged at the lower end of the outer shell and connected to the lower end of the packing flow channel, a gas flow channel is also arranged in the outer shell, an air inlet interface is arranged at the lower end of the outer shell and connected to the gas flow channel, and an air outlet interface is arranged at the upper end of the outer shell and connected to the gas flow channel, and the gas flow channel is characterized in that the gas flow channel as a whole is arranged to zigzag upward and repeatedly pass through the packing flow channel horizontally.

[0011] In this way, the filler in this equipment can be fed from the feeding device, and then flow downward along the filler flow channel by its own weight and react with the coal gas to achieve purification treatment, and then be discharged from the discharging device, which facilitates the replacement and updating of the filler and realizes mobile desulfurization treatment. And compared with the moving bed type blast furnace gas desulfurization device disclosed in CN202011380864.2. In this scheme, the gas flow channel is designed to be repeatedly horizontally penetrated from the bottom to the top of the filler flow channel. The coal gas (the coal gas in this application refers to the blast furnace gas) is gradually passed from the filler at the bottom where the effect is poor to the filler at the top where the effect is better in multiple times, and repeatedly interacts with the filler to achieve reaction (adsorption reaction or hydrolysis reaction) treatment, so it overcomes the defect that the overall treatment effect is poor due to the uneven treatment effect of the upper and lower positions of the filler, and achieves the purpose of full reaction between the coal gas and the filler. Moreover, in this way, before the filler falls out of the discharging device, it is in contact with the freshest incoming gas at the last position at the lower end, which better ensures that the filler reaches the maximum utilization efficiency before falling out; and before the gas enters the gas outlet interface at the upper end and is discharged, it is also in contact with the freshest incoming filler at the last position, which also better ensures that the gas reaches the maximum treatment effect. Therefore, this method greatly improves the reaction effect of the filler and the gas, ensures the utilization rate of the filler, and avoids the waste of the filler.

[0012] As a preferred structural mode, the outer shell is in the shape of a vertical cylinder as a whole, and an inner ring partition and an outer ring partition in the shape of a vertical cylinder are coaxially spaced in the middle position inside the outer shell, and air holes with a pore size smaller than the diameter of the filler particles are evenly distributed on the inner ring partition and the outer ring partition, and a filler flow channel is formed between the inner ring partition and the outer ring partition, and the internal space of the inner ring partition forms an internal gas area, and the external space of the outer ring partition forms an external gas area, and airtight horizontal partitions are alternately arranged upward in the internal gas area and the external gas area, respectively, and the horizontal partitions divide the corresponding internal gas area and external gas area into a plurality of gas retention chambers, the gas retention chamber at the lowest end is connected to the air inlet interface, and the gas retention chamber at the upper end is connected to the air outlet interface, so that each gas retention chamber and the filler flow channel are connected to form a gas flow channel that repeatedly tortuously moves upward along the inside and outside.

[0013] In this way, after the filler enters the filler flow channel from the feeding device, it flows downward evenly along all sides by its own weight; after the coal gas enters the coal gas flow channel, it continuously contacts the filler in the filler flow channel during the process of repeatedly tortuously rising inside and outside, realizing repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the filler. The treated coal gas is discharged upward, and the reacted filler is discharged downward. At the same time, compared with the method of using a rectangular structure filler flow channel, under the same space size conditions, the filler and airflow are more fully in contact and the reaction is more efficient; at the same time, the circular structure does not have corners that cause stress concentration and insufficient airflow, which can make the force at each location and the flow of airflow more balanced and stable, ensuring the reliability of the equipment.

[0014] Furthermore, the upper and lower ends of the outer ring partition are connected and fixed to the outer shell, and the inner ring partition is supported and fixed on the outer ring partition by a horizontally arranged connecting rod, so as to better ensure the stability and reliability of the support.

[0015] Furthermore, the gas retention chamber connected to the gas inlet interface and the gas retention chamber connected to the gas outlet interface are both located in the external gas area, so that the gas inlet and outlet structure connection is simpler and the setting is more convenient.

[0016] Furthermore, a ring-shaped gas distribution chamber is arranged around the outer periphery of the gas retention chamber connected to the air inlet interface. The air inlet interface and the gas distribution chamber are connected. A plurality of openings are evenly distributed along the annular direction of the gas distribution chamber and connected to the corresponding gas retention chambers.

[0017] In this way, uniform gas distribution in the circumferential direction can be achieved during air intake, so that the gas can pass through the packing flow channel more evenly along the circumferential direction into the internal gas area after entering, avoiding imbalance caused by air intake in one direction. In addition, a gas collecting chamber with a similar structural principle to the gas distribution chamber can also be set at the gas outlet interface to better ensure the stable and balanced air flow and air pressure distribution, which will not be described in detail.

[0018] Furthermore, a supporting device is provided in the packing flow channel, and the supporting device includes a supporting plate horizontally arranged along the annular direction of the packing flow channel. The supporting plate is generally conical ring-shaped, and one side (inside or outside) of the supporting plate is connected to the side wall of the packing flow channel, and the other side is suspended obliquely downward.

[0019] In this way, the setting of the support plate plays a certain supporting role on the upper filler without affecting the downward flow of the filler, thereby preventing the filler at the bottom of the filler flow channel from being broken by excessive pressure, affecting the reaction effect and gas outlet quality.

[0020] Furthermore, the supporting device includes a long supporting plate (with a width dimension larger than the short supporting plate) and a short supporting plate respectively fixed on the side walls on both sides of the inner side of the filling flow channel, and the suspended ends of the long supporting plate and the short supporting plate are respectively arranged at oblique staggered intervals relative to each other.

[0021] In this way, there are upward supporting force positions on the entire cross-section of the filler flow channel, avoiding gaps and leaks, ensuring balanced and stable upward support, thus ensuring the uniformity of the downward flow of the filler and the stability of the desulfurization reaction.

[0022] Furthermore, multiple groups of supporting devices are arranged in the filler flow channel along the height direction, so that the height of the filler flow channel and the shell can be extended as much as possible, thereby improving the treatment effect.

[0023] Furthermore, a group of supporting devices is provided at corresponding height positions of each horizontal partition.

[0024] This can also encourage the coal gas to pass through the packing flow channel in a horizontal direction as much as possible, so as to ensure that the coal gas repeatedly passes through the packing area horizontally and then upwards, forming a sufficiently long coal gas flow path, thereby better ensuring the treatment effect.

[0025] Furthermore, in any two groups of supporting devices at adjacent upper and lower positions, the positions of the long supporting plates and the short supporting plates are arranged to be opposite to each other on the left and right sides, so as to better ensure the overall balance of the supporting force during the downward flow of the filler.

[0026] Furthermore, in the supporting device, the long supporting plate is located below the short supporting plate, and the long supporting plate is composed of a plurality of fan-shaped supporting plate single blocks evenly distributed in the circumferential direction, and the upper end of the supporting plate single block is hingedly mounted on the inner side wall of the filling channel, and the lower part of the supporting plate single block is supported and connected to the corresponding inner side wall of the filling channel through a supporting spring.

[0027] 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 plate will hinder the flow rate adjustment of the filler. Therefore, in this scheme, the long support plate is further set below the short support 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 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 plate and the short support 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.

[0028] Furthermore, the support spring is a coil spring and is made of shape memory alloy material.

[0029] 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 plate and the short support plate under stress, and 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 plate to rotate downward, increases the gap distance between the long support plate and the short support plate, reduces obstacles, and increases the rate of downward flow of the packing, achieving the effect of active adjustment.

[0030] Furthermore, 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.

[0031] 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.

[0032] Furthermore, the upper end of the long supporting plate is rotatably mounted in a mounting groove on the inner side wall of the filler flow channel, and a flexible sealing skin is connected and arranged around the long supporting plate and between the corresponding inner side wall of the filler flow channel.

[0033] In this way, a flexible seal is achieved on the inner side of the long supporting plate, preventing the upper hinge and the lower supporting spring from failing due to material inclusions, thereby ensuring the stability of the device operation.

[0034] Furthermore, the feeding device includes a feeding funnel located at the upper end of the outer shell, and also includes a feeding container connected 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, and 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 the 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.

[0035] In this way, when feeding, the filler is first introduced into the feeding funnel, the lower switch valve of the feed is in a closed state, the upper switch valve of the feed is opened, the filler is first allowed to enter the feed container, and then the upper switch valve of the feed is closed. At this time, the feed gas replacement inlet and the feed gas replacement outlet are first opened, and the safe gas is introduced into the feed container to squeeze out the air in the gap of the filler and discharge it through the feed gas replacement outlet, and then the feed gas replacement inlet and the feed gas replacement outlet are closed. Then the lower switch valve of the feed is opened, and the filler in the feed container can flow downward into the filler flow channel by its own weight, realizing the automatic downward flow replenishment of the filler, and ensuring the mobile reaction treatment process. In this way, the oxygen component in the air can be prevented from entering the filler flow channel together with the filler, causing deflagration during the reaction and damaging the equipment, thereby improving the safety of the equipment operation.

[0036] 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 gas or carbon dioxide, can also be used in implementation.

[0037] Furthermore, an oxygen sensor is provided at the outlet of the feed gas replacement and is connected to the control center.

[0038] In this way, the oxygen sensor can detect the oxygen content at the displacement outlet. When the oxygen content is lower than a preset threshold (e.g., 0.5%), it can be determined that the air has been exhausted, which facilitates accurate control and execution of subsequent operations. During implementation, the control center can further connect and control the upper switch valve for feeding, the lower switch valve for feeding, the switch at the gas displacement inlet for feeding, and the air pump, so that the above detection and control process can be automated.

[0039] Furthermore, a carbon monoxide sensor is designed at the outlet of the feed gas replacement outlet and is connected to the control center.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] Furthermore, the discharging device includes a discharging container which is connected to the filling flow channel and is arranged below the outer shell, a discharging port is downwardly arranged at the lower end of the discharging container, an upper discharging switch valve is arranged between the discharging container and the outer shell, a lower discharging switch valve is arranged between the discharging container and the discharging port, a discharging gas replacement inlet equipped with a switch is also arranged on one side of the discharging container, the discharging gas replacement inlet is connected to the safety gas source container through a safety gas access pipeline and an air pump, and a discharging gas replacement outlet equipped with a switch is correspondingly arranged on the other side of the discharging container.

[0048] In this way, during discharging, the lower discharging switch valve is in a closed state, and the upper discharging switch valve is opened, so that the deactivated filler that has completed the reaction can enter the discharging container first. When the accumulated filler in the discharging container is almost full, close the upper discharging switch valve, and then open the discharging gas replacement inlet and the discharging gas replacement outlet first, and introduce safety gas into the discharging container to squeeze out the coal gas mixed in the gap of the filler and discharge it through the discharging gas replacement outlet. Then close the discharging gas replacement inlet and the discharging gas replacement outlet. Then open the lower discharging switch valve, and the filler in the discharging container can flow out of the device downward by its own weight to achieve discharging. In this way, the leakage of coal gas mixed in the deactivated filler can be avoided, and the safety of equipment operation is improved.

[0049] 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 gas or carbon dioxide, can also be used in implementation.

[0050] Furthermore, a carbon monoxide sensor is provided at the outlet for gas replacement of the discharging material and is connected to the control center.

[0051] In this way, the carbon monoxide concentration at the outlet of the gas replacement for discharging can be detected by the carbon monoxide sensor. When the concentration is lower than the preset value (for example, 0.5%), it can be determined that the gas in the discharging container has been completely replaced and discharged, which is convenient for accurate control and execution of subsequent operations. Furthermore, the control center can be connected to and controlled by the upper discharging switch valve, the lower discharging switch valve, the gas replacement inlet for discharging, the switch at the gas replacement inlet for discharging, and the air pump, so that the above-mentioned detection and control process can be automated.

[0052] Furthermore, an oxygen sensor connected to the control center is also provided at the outlet position for gas replacement of the discharging material.

[0053] In this way, after the deactivated filler in the discharge container is discharged, before the next discharge, the lower discharge switch valve can be closed first, and the upper discharge switch valve can be kept in a closed state. Then open the discharge gas replacement inlet and the discharge gas replacement outlet, and introduce safe gas into the discharge container to squeeze out the air inside and discharge it through the discharge gas replacement outlet. When exhausting, the exhaust effect is detected by the oxygen sensor. When the oxygen content is lower than the preset threshold (for example, 0.5%), it can be judged that the air has been exhausted, which is convenient for precise control and execution of subsequent operations. In this way, it is avoided that the air enters the filler flow channel in the shell from the discharge device during the next discharge, causing explosion during the reaction and damaging the equipment, thereby improving the safety of equipment operation.

[0054] Furthermore, the discharge upper switch valve comprises two switch valves which are connected in series and arranged in parallel, including a flow regulating switch valve located at the top and a sealing switch valve located at the bottom.

[0055] In this way, the flow regulating switch valve can be used to adjust the size of the discharge speed of the packing flow channel to the discharge container, so that it matches the flow speed of the packing in the packing flow channel, and the flow speed of the packing matches the gas flow rate to ensure the reaction effect. At the same time, when the deactivated packing enters the discharge container, when closing the discharge switch valve, the flow 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 the subsequent discharge is opened, the sealing switch valve is opened first and then the flow regulating switch valve is opened. In this way, it can be ensured that the sealing switch valve is not affected by the flow of the packing when closing and opening, so that it is not in contact with the packing as much as possible, and the sealing effect and durability are better guaranteed. During implementation, the non-sealed switch valve located above can be a plug valve or a butterfly valve, which is sensitive, fast and low-cost, and the sealed switch valve located below can be a ball valve or a blind plate valve to ensure a good sealing effect.

[0056] Furthermore, the discharge lower switch valve comprises two 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.

[0057] In this way, when the switch valve is opened at the discharge, the sealed switch valve is opened first and then the non-sealed switch valve is opened, and when the switch valve is closed at the discharge, the non-sealed switch valve is closed first and then the sealed switch valve. In this way, the feed of the sealed switch valve does not contact the packing, ensuring that the opening and closing of the sealed switch valve is not affected by the flow of the packing, and ensuring the reliability and durability of its sealing.

[0058] In addition, during implementation, a discharge retention container can be further connected in series between the upper part of the discharge container and the outer shell to communicate with the filler flow channel. This is because the structure and function of the aforementioned discharge device is to achieve batch discharge to remove the coal gas mixed in the discharge and ensure the sealing effect of the discharge. Therefore, after adding another discharge retention container, the deactivated filler will first enter the discharge retention container and accumulate when discharged. The discharge retention container can realize uninterrupted continuous discharge of the filler channel, avoiding the impact of discharge stopping on the reaction during the process of removing the coal gas mixed in the discharge. Furthermore, a flow regulating valve is set between the discharge retention container and the outer shell and connected to the control center, so that the discharge flow rate can be controlled as needed.

[0059] As another optional structural method, at least one filling area is arranged in the middle position inside the shell along the width direction, the upper end of the filling area is connected to the feeding device, and the lower end is connected to the discharging device to form the filling flow channel inside; air-permeable vertical partitions are respectively arranged on the left and right sides of the filling area to form a gas area in the shell outside the vertical partitions, and air-impermeable horizontal partitions are alternately arranged upward in the gas areas on both sides, and the horizontal partitions divide the corresponding gas areas into a plurality of gas retention chambers, the lowermost gas retention chamber is connected to the air inlet interface, and the uppermost gas retention chamber is connected to the air outlet interface, so that each gas retention chamber and the filling area are connected to form an overall S-shaped gas flow channel.

[0060] In this way, the inner cavity of the shell is divided into a rectangular filler area and a gas area by means of a breathable vertical partition, and a filler flow channel is formed in the filler area. The gas area relies on the horizontal partitions arranged alternately to form an S-shaped gas flow channel that can penetrate the filler area. After the gas enters the gas flow channel, it continuously contacts the filler in the filler area during the S-shaped rise process, achieving repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the filler. The treated gas is discharged upward, and the reacted filler is discharged downward. Therefore, compared with the cylindrical structure, while also improving the utilization efficiency of the filler, it has the advantages of a simpler structure and more convenient implementation. Furthermore, air holes with a pore size smaller than the diameter of the filler particles are evenly distributed on the vertical partitions. It maintains the air permeability effect.

[0061] In addition, the present application also discloses a blast furnace gas fine desulfurization system, comprising three of the above-mentioned mobile blast furnace gas desulfurization equipment arranged in series, the filler in the first mobile blast furnace gas desulfurization equipment adopts hydrogen chloride adsorbent filler to form a dechlorination equipment, the filler in the second mobile blast furnace gas desulfurization equipment adopts carbonyl sulfide hydrolysis catalyst filler to form a hydrolysis equipment, and the filler in the third mobile blast furnace gas desulfurization equipment adopts desulfurization adsorbent filler to form a desulfurization equipment, the gas outlet interface of the first mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the second mobile blast furnace gas desulfurization equipment, and the gas outlet interface of the second mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the third mobile blast furnace gas desulfurization equipment to realize series connection.

[0062] In this way, three devices are connected in series, and different fillers are used to react and treat the coal gas, so as to achieve fine desulfurization of the coal gas.

[0063] Therefore, this scheme is used for the desulfurization of coal gas, and can realize the fine desulfurization process. In principle, the scheme eliminates the problems of deflagration and pollutant leakage during the loading / discharging process of materials (catalysts / adsorbents), greatly improving the overall operation safety. At the same time, the scheme uses coal gas to repeatedly pass through the downward-flowing filler horizontally and flow upward in a zigzag manner to achieve multiple purification effects of overlapping flows, which significantly improves the purification efficiency of pollutants (originally an average of 50% purification efficiency, 1000+ hours of operation → now an average of 95%+ purification efficiency, and more than 8000 hours of operation). In addition, this scheme realizes the automatic replacement of materials, and can adjust the flow of fillers according to the corresponding gas flow to match it, ensuring the reaction effect and utilization efficiency of the fillers, avoiding waste, and ensuring that the coal gas purification is in a high-efficiency and stable operation state for a long time (the original purification efficiency rapidly decayed with the progress of flue gas treatment until it was completely inactivated / lost the purification ability → now maintains 95%+ purification efficiency and stable operation for more than 8000 hours).

[0064] Therefore, in summary, the present application has the advantages of high desulfurization treatment efficiency, high filler utilization rate, more convenient control of the reaction process, and better safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0065] Figure 1 The diagram is a schematic diagram of the structure of the mobile blast furnace gas desulfurization equipment in Example 1 of the utility model. The arrows in the diagram indicate the gas flow direction in the gas flow channel.

[0066] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the shell.

[0067] Figure 3 During implementation, when the long support plate is composed of multiple support plate blocks spliced ​​together, a structural schematic diagram of a single support plate block is provided.

[0068] Figure 4 A schematic diagram of the structure after adding a feed retention container and a discharge retention container for implementation.

[0069] Figure 5 This is a schematic diagram of the structure of the mobile blast furnace gas desulfurization equipment in Example 2.

[0070] Figure 6 This is a schematic diagram of the structure of the blast furnace gas fine desulfurization system in Example 3. DETAILED DESCRIPTION

[0071] The utility model is further described in detail below in conjunction with specific implementation methods.

[0072] Example 1: A mobile blast furnace gas desulfurization device, see Figure 1-2 , including a shell 1 which is arranged vertically as a whole, a packing flow channel 2 is arranged vertically inside the shell 1, a feeding device is arranged at the upper end of the shell 1 and connected to the upper end of the packing flow channel 2, a discharging device is arranged at the lower end of the shell 1 and connected to the lower end of the packing flow channel 2, a gas flow channel 3 is also arranged in the shell, an air inlet interface 4 is arranged at the lower end of the shell and connected to the gas flow channel 3, and an air outlet interface 5 is arranged at the upper end of the shell 1 and connected to the gas flow channel 3. The characteristic is that the gas flow channel 3 as a whole is arranged to be zigzag from bottom to top and repeatedly penetrates the packing flow channel horizontally.

[0073] In this way, the filler in this equipment can be fed from the feeding device, and then flow downward along the filler flow channel by its own weight and react with the coal gas to achieve purification treatment, and then be discharged from the discharging device, which facilitates the replacement and updating of the filler and realizes mobile desulfurization treatment. And compared with the moving bed type blast furnace gas desulfurization device disclosed in CN202011380864.2. In this scheme, the gas flow channel is designed to be repeatedly horizontally penetrated from the bottom to the top of the filler flow channel. The coal gas (the coal gas in this application refers to the blast furnace gas) is gradually passed from the filler at the bottom where the effect is poor to the filler at the top where the effect is better in multiple times, and repeatedly interacts with the filler to achieve reaction (adsorption reaction or hydrolysis reaction) treatment, so it overcomes the defect that the overall treatment effect is poor due to the uneven treatment effect of the upper and lower positions of the filler, and achieves the purpose of full reaction between the coal gas and the filler. Moreover, in this way, before the filler falls out of the discharging device, it is in contact with the freshest incoming gas at the last position at the lower end, which better ensures that the filler reaches the maximum utilization efficiency before falling out; and before the gas enters the gas outlet interface at the upper end and is discharged, it is also in contact with the freshest incoming filler at the last position, which also better ensures that the gas reaches the maximum treatment effect. Therefore, this method greatly improves the reaction effect of the filler and the gas, ensures the utilization rate of the filler, and avoids the waste of the filler.

[0074] In this embodiment, the shell 1 is in the shape of a vertical cylinder as a whole. An inner ring partition 6 and an outer ring partition 7 in the shape of a vertical cylinder as a whole are coaxially spaced at a middle position inside the shell 1. Air holes with an aperture smaller than the diameter of the filler particles are evenly distributed on the inner ring partition 6 and the outer ring partition 7. A filler flow channel 2 is formed between the inner ring partition 6 and the outer ring partition. The internal space of the inner ring partition 6 forms an internal gas area, and the external space of the outer ring partition 7 forms an external gas area. Airtight horizontal partitions 8 are alternately arranged upward in the internal gas area and the external gas area, respectively. The horizontal partitions 8 divide the corresponding internal gas area and the external gas area into a plurality of gas retention chambers. The gas retention chamber at the lowest end is connected to the air inlet interface 4, and the gas retention chamber at the uppermost end is connected to the air outlet interface 5, so that each gas retention chamber and the filler flow channel are connected to form a gas flow channel 3 that repeatedly tortuously moves upward along the inside and outside.

[0075] In this way, after the filler enters the filler flow channel from the feeding device, it flows downward evenly along all sides by its own weight; after the coal gas enters the coal gas flow channel, it continuously contacts the filler in the filler flow channel during the process of repeatedly tortuously rising inside and outside, realizing repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the filler. The treated coal gas is discharged upward, and the reacted filler is discharged downward. At the same time, compared with the method of using a rectangular structure filler flow channel, under the same space size conditions, the filler and airflow are more fully in contact and the reaction is more efficient; at the same time, the circular structure does not have corners that cause stress concentration and insufficient airflow, which can make the force at each location and the flow of airflow more balanced and stable, ensuring the reliability of the equipment.

[0076] The upper and lower ends of the outer ring partition 7 are connected and fixed to the outer shell 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), so as to better ensure the stability and reliability of the support.

[0077] Among them, the gas retention chamber connected to the gas inlet interface 4 and the gas retention chamber connected to the gas outlet interface are both located in the external gas area. In this way, the gas inlet and outlet structure connection is simpler and the setting is more convenient.

[0078] Among them, a ring-shaped gas distribution chamber 9 is arranged around the outer periphery of the gas retention chamber connected to the air inlet interface 4. The air inlet interface and the gas distribution chamber 9 are connected. The gas distribution chamber 9 has multiple openings evenly distributed along the annular direction and connected to the corresponding gas retention chambers.

[0079] In this way, uniform gas distribution in the circumferential direction can be achieved during air intake, so that the gas can pass through the packing flow channel more evenly in the circumferential direction into the internal gas area after entering, avoiding imbalance caused by air intake in one direction.

[0080] In addition, during implementation, a ring-shaped gas collecting chamber 39 is arranged around the outer periphery of the gas retention chamber connected to the gas outlet interface 5, the gas outlet interface and the gas collecting chamber 39 are connected, and a plurality of openings are evenly distributed along the annular direction on the gas collecting chamber 39 and connected to the corresponding gas retention chambers.

[0081] In this way, an air collecting chamber with a similar structural principle to the air distribution chamber is also provided at the air outlet interface to better ensure the stable and balanced air flow and air pressure distribution.

[0082] Among them, a supporting device is also arranged in the packing flow channel, and the supporting device includes a supporting plate arranged horizontally along the annular direction of the packing flow channel. The supporting plate is conical ring-shaped as a whole, and one side (inside or outside) of the supporting plate is connected to the side wall of the packing flow channel, and the other side is suspended obliquely downward.

[0083] In this way, the setting of the support plate plays a certain supporting role on the upper filler without affecting the downward flow of the filler, thereby preventing the filler at the bottom of the filler flow channel from being broken by excessive pressure, affecting the reaction effect and gas outlet quality.

[0084] Among them, the supporting device includes a long supporting plate 10 (with a width dimension larger than the short supporting plate) and a short supporting plate 11, which are respectively fixedly arranged on the side walls on both sides of the inside of the filling flow channel, and the suspended ends of the long supporting plate 10 and the short supporting plate 11 are respectively arranged at oblique and staggered intervals relative to each other.

[0085] In this way, there are upward supporting force positions on the entire cross-section of the filler flow channel, avoiding gaps and leaks, ensuring balanced and stable upward support, thus ensuring the uniformity of the downward flow of the filler and the stability of the desulfurization reaction.

[0086] Among them, multiple groups of supporting devices are arranged in the filler flow channel along the height direction, so that the height of the filler flow channel and the shell can be extended as much as possible, thereby improving the treatment effect.

[0087] Wherein, a group of supporting devices is correspondingly arranged at the corresponding height position of each horizontal partition 8.

[0088] This can also encourage the coal gas to pass through the packing flow channel in a horizontal direction as much as possible, so as to ensure that the coal gas repeatedly passes through the packing area horizontally and then upwards, forming a sufficiently long coal gas flow path, thereby better ensuring the treatment effect.

[0089] Among them, in any two groups of supporting devices at adjacent positions, the positions of the long supporting plates 10 and the short supporting plates 11 are set to be opposite to each other. In this way, the overall balance of the supporting force during the downward flow of the filler is better ensured.

[0090] During implementation, the supporting device can be further improved as follows: in the supporting device, the long supporting plate is arranged below the short supporting plate, and the long supporting plate is composed of a plurality of fan-shaped supporting plates 12 evenly distributed in the circumferential direction. Figure 3 The upper end of the support plate single block 12 is hingedly mounted on the inner wall of the filler flow channel, and the lower part of the support plate single block 12 is supported and connected to the corresponding inner wall of the filler flow channel through a support spring 13.

[0091] 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 plate will hinder the flow rate adjustment of the filler. Therefore, in this scheme, the long support plate is further set below the short support 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 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 plate and the short support 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.

[0092] Wherein, the support spring is a coil spring and is made of shape memory alloy material.

[0093] 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 plate and the short support plate under stress, and 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 plate to rotate downward, increases the gap distance between the long support plate and the short support plate, reduces obstacles, and increases the rate of downward flow of the packing, achieving the effect of active adjustment.

[0094] 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.

[0095] 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.

[0096] The upper end of the long supporting 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 supporting plate 12 and between the corresponding inner wall of the filler flow channel.

[0097] In this way, a flexible seal is achieved on the inner side of the long supporting plate, preventing the upper hinge and the lower supporting spring from failing due to material inclusions, thereby ensuring the stability of the device operation.

[0098] Among them, the feeding device includes a feeding funnel 15 located at the upper end of the shell, and also includes a feeding container 16 connected between the feeding funnel and the shell 1, an upper feeding switch valve 17 is arranged between the feeding funnel 15 and the feeding container 16, and a lower feeding switch valve 18 is arranged between the feeding container and the shell. A feeding gas replacement inlet 19 equipped with a switch (not shown in the figure) is also arranged on one side of the feeding container. The feeding gas replacement inlet is connected to the safety gas source container (not shown in the figure) through a safety gas access pipeline and an air pump, and 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.

[0099] In this way, when feeding, the filler is first introduced into the feeding funnel, the lower switch valve of the feed is in a closed state, the upper switch valve of the feed is opened, the filler is first allowed to enter the feed container, and then the upper switch valve of the feed is closed. At this time, the feed gas replacement inlet and the feed gas replacement outlet are first opened, and the safe gas is introduced into the feed container to squeeze out the air in the gap of the filler and discharge it through the feed gas replacement outlet, and then the feed gas replacement inlet and the feed gas replacement outlet are closed. Then the lower switch valve of the feed is opened, and the filler in the feed container can flow downward into the filler flow channel by its own weight, realizing the automatic downward flow replenishment of the filler, and ensuring the mobile reaction treatment process. In this way, the oxygen component in the air can be prevented from entering the filler flow channel together with the filler, causing deflagration during the reaction and damaging the equipment, thereby improving the safety of the equipment operation.

[0100] 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 gas or carbon dioxide, can also be used in implementation.

[0101] Among them, an oxygen sensor is also provided at the feed gas replacement outlet 20 and is connected to the control center (not shown in the figure).

[0102] In this way, the oxygen sensor can detect the oxygen content at the displacement outlet. When the oxygen content is lower than a preset threshold (e.g., 0.5%), it can be determined that the air has been exhausted, which is convenient for accurate control and execution of subsequent operations. During implementation, the control center can be connected to and controlled by the upper feed switch valve, the lower feed switch valve, the feed gas displacement inlet, the switch at the feed gas displacement inlet, and the air pump, so that the above detection and control process can be automated.

[0103] The feed gas replacement outlet 20 is also provided with a carbon monoxide sensor connected to the control center (not shown in the figure).

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] In addition, when implementing, see Figure 4 , a feed retention container 27 can be further connected in series between the lower part of the feed container 16 and the outer shell 1 and communicated with the filler flow channel. 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 on the reaction during the air removal process. Among them, a flow regulating valve 28 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.

[0112] Among them, the discharging device includes a discharging container 21 which is connected to the filling flow channel and is arranged below the shell. A discharging port 22 is downwardly arranged at the lower end of the discharging container. An upper discharging switch valve 23 is arranged between the discharging container and the shell. A lower discharging switch valve 24 is arranged between the discharging container and the discharging port. A discharging gas replacement inlet 25 equipped with a switch is also arranged on one side of the discharging container. The discharging gas replacement inlet 25 is connected to the safety gas source container through a safety gas access pipeline and an air pump (not shown in the figure), and a discharging gas replacement outlet 26 equipped with a switch is correspondingly arranged on the other side of the discharging container.

[0113] In this way, during discharging, the lower discharging switch valve is in a closed state, and the upper discharging switch valve is opened, so that the deactivated filler that has completed the reaction can enter the discharging container first. When the accumulated filler in the discharging container is almost full, close the upper discharging switch valve, and then open the discharging gas replacement inlet and the discharging gas replacement outlet first, and introduce safety gas into the discharging container to squeeze out the coal gas mixed in the gap of the filler and discharge it through the discharging gas replacement outlet. Then close the discharging gas replacement inlet and the discharging gas replacement outlet. Then open the lower discharging switch valve, and the filler in the discharging container can flow out of the device downward by its own weight to achieve discharging. In this way, the leakage of coal gas mixed in the deactivated filler can be avoided, and the safety of equipment operation is improved.

[0114] 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 gas or carbon dioxide, can also be used in implementation.

[0115] Among them, a carbon monoxide sensor is also provided at the position of the gas replacement outlet 26 for discharging and is connected to the control center (not shown in the figure).

[0116] In this way, the carbon monoxide concentration at the outlet of the gas replacement for discharging can be detected by the carbon monoxide sensor. When the concentration is lower than the preset value (for example, 0.5%), it can be determined that the gas in the discharging container has been completely replaced and discharged, which is convenient for accurate control and execution of subsequent operations. Among them, the control center can be connected and controlled with the upper discharging switch valve, the lower discharging switch valve, the gas replacement inlet for discharging, the switch at the gas replacement inlet for discharging, and the air pump, so that the above detection and control process can be automated.

[0117] Among them, an oxygen sensor is also provided at the position of the gas replacement outlet 26 for discharging and is connected to the control center (not shown in the figure).

[0118] In this way, after the deactivated filler in the discharge container is discharged, before the next discharge, the lower discharge switch valve can be closed first, and the upper discharge switch valve can be kept in a closed state. Then open the discharge gas replacement inlet and the discharge gas replacement outlet, and introduce safe gas into the discharge container to squeeze out the air inside and discharge it through the discharge gas replacement outlet. When exhausting, the exhaust effect is detected by the oxygen sensor. When the oxygen content is lower than the preset threshold (for example, 0.5%), it can be judged that the air has been exhausted, which is convenient for precise control and execution of subsequent operations. In this way, it is avoided that the air enters the filler flow channel in the shell from the discharge device during the next discharge, causing explosion during the reaction and damaging the equipment, thereby improving the safety of equipment operation.

[0119] During implementation, the outlet for discharging gas is connected to an external pipeline and discharged to high altitude. In this way, when the outlet for discharging gas is used to discharge air, it can be directly discharged to the outside. When the outlet for discharging gas is used to discharge coal gas, since the amount is very small, it can be discharged to high altitude without affecting the ground staff.

[0120] The discharge upper switch valve 23 comprises two switch valves 23 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.

[0121] In this way, the flow regulating switch valve can be used to adjust the size of the discharge speed of the packing flow channel to the discharge container, so that it matches the flow speed of the packing in the packing flow channel, and the flow speed of the packing matches the gas flow rate to ensure the reaction effect. At the same time, when the deactivated packing enters the discharge container, when closing the discharge switch valve, the flow 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 the subsequent discharge is opened, the sealing switch valve is opened first and then the flow regulating switch valve is opened. In this way, it can be ensured that the sealing switch valve is not affected by the flow of the packing when closing and opening, so that it is not in contact with the packing as much as possible, and the sealing effect and durability are better guaranteed. During implementation, the non-sealed switch valve located above can be a plug valve or a butterfly valve, which is sensitive, fast and low-cost, and the sealed switch valve located below can be a ball valve or a blind plate valve to ensure a good sealing effect.

[0122] The discharge lower switch valve 24 comprises two switch valves 24 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.

[0123] In this way, when the switch valve is opened at the discharge, the sealed switch valve is opened first and then the non-sealed switch valve is opened, and when the switch valve is closed at the discharge, the non-sealed switch valve is closed first and then the sealed switch valve. In this way, the feed of the sealed switch valve does not contact the packing, ensuring that the opening and closing of the sealed switch valve is not affected by the flow of the packing, and ensuring the reliability and durability of its sealing.

[0124] In addition, when implementing, see Figure 4 , a discharge retention container 29 can be further connected in series between the discharge container 21 and the outer shell 1 and communicated with the packing flow channel. This is because the structure and function of the aforementioned discharge device is to realize batch discharge to remove the coal gas mixed in the discharge and ensure the sealing effect of the discharge. Therefore, after adding another discharge retention container, the deactivated filler will first enter the discharge retention container and accumulate when discharged. The discharge retention container can realize uninterrupted continuous discharge inside the packing channel, avoiding the impact of discharge stopping on the reaction during the process of removing the coal gas mixed in the discharge. Among them, a flow regulating valve 30 is set between the discharge retention container 29 and the outer shell 1 and connected to the control center, so that the discharge flow rate can be controlled according to needs.

[0125] Example 2: See Figure 5 The structure of the present embodiment 2 is different from that of the embodiment 1 only in that the outer shell 31 and the filling area 32 inside it are rectangular, and the supporting plate in the corresponding supporting device 33 is adjusted to a corresponding rectangular structure, and the rest of the feeding device 34 and the discharging device 35 structures remain the same as those of the embodiment 1 and are not described in detail here.

[0126] Specifically, see Figure 5 The shell 31 in Example 2 is a rectangular structure as a whole. At least one packing area 32 is arranged in the middle position of the 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 it; air-permeable vertical partitions are respectively arranged on the left and right sides of the packing area 32, and a gas area 36 is formed in the shell outside the vertical partition. Air-impermeable horizontal partitions 37 are alternately arranged upward in the gas areas on both sides. The horizontal partitions divide the corresponding gas areas into a plurality of gas retention chambers. The gas retention chamber at the lower end is connected to the gas inlet interface, and the gas retention chamber at the upper end is connected to the gas outlet interface, so that each gas retention chamber and the packing area are connected to form an overall S-shaped gas flow channel.

[0127] In this way, the inner cavity of the shell is divided into a rectangular filler area and a gas area by means of a breathable vertical partition, and a filler flow channel is formed in the filler area. The gas area relies on the horizontal partitions arranged alternately to form an S-shaped gas flow channel that can penetrate the filler area. After the gas enters the gas flow channel, it continuously contacts the filler in the filler area during the S-shaped rise process, achieving repeated interactive reaction treatment, greatly improving the treatment effect and utilization efficiency of the filler. The treated gas is discharged upward, and the reacted filler is discharged downward. Therefore, compared with the cylindrical structure, while also improving the utilization efficiency of the filler, it has the advantages of a simpler structure and more convenient implementation. Among them, air permeable holes with a pore size smaller than the diameter of the filler particles are evenly distributed on the vertical partitions. It keeps the air permeability effect.

[0128] During implementation, in this embodiment 2, the supporting plate in the supporting device 33 is adjusted to a corresponding rectangular structure. That is equivalent to the present application also disclosing a supporting device suitable for the packing flow channel of a mobile blast furnace gas desulfurization equipment, including a supporting plate horizontally arranged along the width direction of the packing flow channel, the overall shape of the supporting plate matches the oblique cross-sectional shape of the packing flow channel (for example, the supporting plate in embodiment 1 is in a conical ring shape as a whole, while in embodiment 2 it is rectangular), one side (inside or outside) of the supporting plate is connected to the side wall of the packing flow channel, and the other side is suspended obliquely downward. In this way, the supporting effect of the supporting plate can be relied on to prevent the packing at the bottom of the packing flow channel from being crushed due to excessive pressure, thereby affecting the reaction effect and gas outlet quality.

[0129] Furthermore, the supporting device may gradually include all the structural contents of the supporting device in Example 1 and have the corresponding effects. When the oblique cross-sectional shape of the filler flow channel matches the rectangular shape, the long supporting plate can be composed of a plurality of rectangular supporting plates evenly distributed in the length direction. The remaining structure is consistent with Example 1 and can be understood with reference to Example 1, and will not be described in detail here.

[0130] Example 3, see Figure 6 In this embodiment 3, a blast furnace gas fine desulfurization system is disclosed, comprising three mobile blast furnace gas desulfurization equipments as shown in embodiment 1 or 2 arranged in series, the filler in the first mobile blast furnace gas desulfurization equipment adopts hydrogen chloride adsorbent filler to form a dechlorination equipment, the filler in the second mobile blast furnace gas desulfurization equipment adopts carbonyl sulfide hydrolysis catalyst filler to form a hydrolysis equipment, the filler in the third mobile blast furnace gas desulfurization equipment adopts desulfurization adsorbent filler to form a desulfurization equipment, the gas outlet interface of the first mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the second mobile blast furnace gas desulfurization equipment, and the gas outlet interface of the second mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the third mobile blast furnace gas desulfurization equipment to realize series connection.

[0131] In this way, three devices are connected in series, and different fillers are used to react and treat the coal gas, so as to achieve fine desulfurization of the coal gas.

[0132] Therefore, this scheme is used for the desulfurization of coal gas, and can realize the fine desulfurization process. In principle, the scheme eliminates the problems of deflagration and pollutant leakage during the loading / discharging process of materials (catalysts / adsorbents), greatly improving the overall operation safety. At the same time, the scheme uses coal gas to repeatedly pass through the downward-flowing filler horizontally and flow upward in a zigzag manner to achieve multiple purification effects of overlapping flows, which significantly improves the purification efficiency of pollutants (originally an average of 50% purification efficiency, 1000+ hours of operation → now an average of 95%+ purification efficiency, and more than 8000 hours of operation). In addition, this scheme realizes the automatic replacement of materials, and can adjust the flow of fillers according to the corresponding gas flow to match it, ensuring the reaction effect and utilization efficiency of the fillers, avoiding waste, and ensuring that the coal gas purification is in a high-efficiency and stable operation state for a long time (the original purification efficiency rapidly decayed with the progress of flue gas treatment until it was completely inactivated / lost the purification ability → now maintains 95%+ purification efficiency and stable operation for more than 8000 hours).

Claims

1. A mobile blast furnace gas desulfurization equipment, comprising a shell arranged vertically as a whole, a packing flow channel arranged vertically inside the shell, a feeding device arranged at the upper end of the shell connected to the upper end of the packing flow channel, a discharging device arranged at the lower end of the shell connected to the lower end of the packing flow channel, a gas flow channel arranged inside the shell, an air inlet interface arranged at the lower end of the shell connected to the gas flow channel, and an air outlet interface arranged at the upper end of the shell connected to the gas flow channel, characterized in that: The gas flow channel is arranged as a whole to bend upward from the bottom and repeatedly horizontally penetrate the filler flow channel.

2. The mobile blast furnace gas desulfurization equipment according to claim 1, characterized in that: The outer shell is in the shape of a vertical cylinder as a whole, and an inner ring partition and an outer ring partition are coaxially spaced in the middle position inside the outer shell, which are in the shape of a vertical cylinder as a whole. The inner ring partition and the outer ring partition are each evenly provided with air permeable holes with an aperture smaller than the diameter of the filler particles, and a filler flow channel is formed between the inner ring partition and the outer ring partition. The internal space of the inner ring partition forms an internal gas area, and the external space of the outer ring partition forms an external gas area. Airtight horizontal partitions are alternately arranged upward in the internal gas area and the external gas area, respectively, and the horizontal partitions separate the corresponding internal gas area and external gas area into a plurality of gas retention chambers. The gas retention chamber at the lowest end is connected to the air inlet interface, and the gas retention chamber at the uppermost end is connected to the air outlet interface, so that each gas retention chamber and the filler flow channel are connected to form a gas flow channel that repeatedly tortuously moves upward along the inside and outside.

3. The mobile blast furnace gas desulfurization equipment according to claim 2, characterized in that: The gas retention chamber connected to the gas inlet interface and the gas retention chamber connected to the gas outlet interface are both located in the external gas area; A ring-shaped gas distribution chamber is arranged around the outer periphery of the gas retention chamber connected to the gas inlet interface. The gas inlet interface is connected to the gas distribution chamber. A plurality of openings are evenly distributed along the annular direction of the gas distribution chamber and connected to the corresponding gas retention chambers.

4. The mobile blast furnace gas desulfurization equipment according to claim 2, characterized in that: A supporting device is also provided in the packing flow channel, and the supporting device includes a supporting plate horizontally arranged along the annular direction of the packing flow channel. The supporting plate is generally conical ring-shaped, one side of the supporting plate is connected to the side wall of the packing flow channel, and the other side is suspended obliquely downward.

5. The mobile blast furnace gas desulfurization equipment according to claim 4, characterized in that: The supporting device comprises a long supporting plate and a short supporting plate respectively fixedly arranged on the side walls on both sides of the inner side of the filler flow channel, and the suspended ends of the long supporting plate and the short supporting plate are respectively arranged at an oblique and staggered interval relative to each other; A set of supporting devices is provided at a corresponding height position of each horizontal partition; In any two groups of supporting devices at adjacent upper and lower positions, the positions of the long supporting plates and the short supporting plates are arranged to be opposite to each other on the left and right sides.

6. The mobile blast furnace gas desulfurization equipment according to claim 2, characterized in that: The feeding device includes a feeding funnel located at the upper end of the shell, and also includes a feeding container connected and arranged between the feeding funnel and the 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 shell, and 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 the 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.

7. The mobile blast furnace gas desulfurization equipment according to claim 6, characterized in that: An oxygen sensor is also provided at the outlet of the feed gas replacement and is connected to the control center; A carbon monoxide sensor is also designed at the outlet of the feed gas replacement and is connected to the control center; The feed upper switch valve comprises two upper and lower switch valves connected in series and arranged in parallel, including a non-sealed switch valve located at the upper side and a sealed switch valve located at the lower side; 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.

8. The mobile blast furnace gas desulfurization equipment according to claim 2, characterized in that: The discharging device comprises a discharging container which is connected to a filling flow channel and is arranged below the outer shell, a discharging port is arranged downward at the lower end of the discharging container, an upper discharging switch valve is arranged between the discharging container and the outer shell, a lower discharging switch valve is arranged between the discharging container and the discharging port, a discharging gas replacement inlet equipped with a switch is also arranged on one side of the discharging container, the discharging gas replacement inlet is connected to the safety gas source container through a safety gas access pipeline and an air pump, and a discharging gas replacement outlet equipped with a switch is correspondingly arranged on the other side of the discharging container.

9. The mobile blast furnace gas desulfurization equipment according to claim 8, characterized in that: A carbon monoxide sensor is also provided at the outlet for gas replacement of the discharging material and is connected to the control center; An oxygen sensor is also provided at the outlet for gas replacement of the discharging material and is connected to the control center; The discharge upper switch valve comprises two upper and lower switch valves 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; The discharge lower switch valve comprises two 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.

10. A blast furnace gas fine desulfurization system, comprising three mobile blast furnace gas desulfurization equipment as described in any one of claims 1 to 9 arranged in series, the first mobile blast furnace gas desulfurization equipment uses hydrogen chloride adsorbent filler as filler to form a dechlorination equipment, the second mobile blast furnace gas desulfurization equipment uses carbonyl sulfide hydrolysis catalyst filler as filler to form a hydrolysis equipment, the third mobile blast furnace gas desulfurization equipment uses desulfurization adsorbent filler as filler to form a desulfurization equipment, the gas outlet interface of the first mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the second mobile blast furnace gas desulfurization equipment, and the gas outlet interface of the second mobile blast furnace gas desulfurization equipment is connected to the gas inlet interface of the third mobile blast furnace gas desulfurization equipment to achieve series connection.

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