Integral horizontal flow type blast furnace gas purification equipment

Abstract

The utility model discloses integral advection blast furnace gas purification equipment which is characterized by comprising a long-strip-shaped shell which is horizontally arranged on the whole, a gas inlet is formed in one end of the shell, a gas outlet is formed in the other end of the shell, and at least one gas purification unit is arranged in the shell in the length direction. A plurality of vertical gas filtering partition plates are arranged in the coal gas purification unit side by side at intervals and form a plurality of horizontally parallel filler areas, an automatic feeding control device is correspondingly arranged above each filler area, and an automatic discharging control device is arranged below each filler area. The device and the method have the advantages of higher filler utilization efficiency, higher desulfurization efficiency, better effect, convenience in process control, good safety, lower equipment cost and the like, and are particularly suitable for the fine desulfurization process of the blast furnace gas.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace gas purification and treatment, in particular to an integral horizontal flow type blast furnace gas purification device. Background Art

[0002] Blast furnace gas is the exhaust gas from a blast furnace containing combustible gases such as carbon monoxide and hydrogen produced during the ironmaking process of a blast furnace. It is a byproduct of blast furnace ironmaking. Blast furnace gas can usually be used as a gas fuel in the metallurgical industry or in boiler gas applications. However, blast furnace gas contains a large amount of harmful components, mainly hydrogen sulfide, and the flue gas produced by combustion needs to be purified before it can be discharged, which greatly limits the application of blast furnace gas. Therefore, now more blast furnace gas is desulfurized and purified before it is exported for use.

[0003] Existing blast furnace gas purification usually adopts a fine desulfurization treatment process, first removing hydrogen chloride in the gas to prevent it from affecting the subsequent hydrolysis reaction; then a hydrolysis reaction is carried out to decompose and remove carbonyl sulfide in the gas to generate hydrogen sulfide; finally, harmful gas components such as hydrogen sulfide are adsorbed. CN201910728476.X once disclosed a comprehensive environmental protection system and process for ironmaking blast furnace gas, and CN202110892639.5 once disclosed a blast furnace gas step-by-step dry deacidification system and method and other patents, which are similar to these three-step treatment principles. However, in the existing gas desulfurization technology, most of the steps are treated in a fixed bed. During fixed bed desulfurization, the filler is fixedly laid in the gas flow channel, which has the following defects. 1 After the purification filler loses its activity, the equipment needs to be shut down to replace the filler, which is inconvenient to operate and reduces production efficiency. 2. The vitality of the packing near the air inlet position is lost faster, while the vitality of the packing near the air outlet position is lost slower. When the harmful components in the outlet gas exceed the standard and the packing needs to be replaced, the packing near the outlet position still has strong vitality, resulting in waste and low overall utilization efficiency of the packing. 3. The packing is fixedly laid for use. When the air inlet flow rate and other conditions change, it cannot be adjusted accordingly, resulting in poor stability of the treatment effect. 4. Existing desulfurization equipment is usually a vertical structure, which has a higher relative equipment cost.

[0004] Therefore, how to design a blast furnace gas desulfurization technology that can replace fillers online, has higher filler utilization efficiency, higher production efficiency, more convenient reaction process control, better safety, and lower cost has become a difficult problem that technical personnel in this field need to consider and solve. Utility Model Content

[0005] In view of the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: how to provide an integrated horizontal flow blast furnace gas purification equipment with higher filler utilization efficiency, higher desulfurization efficiency, better effect, convenient process control, good safety and lower equipment cost, so that it is particularly suitable for the fine desulfurization of blast furnace gas.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] An integral horizontal flow blast furnace gas purification device is characterized in that it comprises an overall horizontally arranged long strip shell, one end of the shell is provided with an air inlet, the other end is provided with an air outlet, at least one gas purification unit is provided inside the shell along the length direction, a plurality of vertical gas filter baffles (referring to baffles through which gas can be filtered but filler cannot pass) are arranged in parallel at intervals inside the gas purification unit to form a plurality of horizontally arranged filler areas, an automatic feeding control device is provided above each filler area, and an automatic discharging control device is provided below the filler area.

[0008] In this way, when the equipment is running, the coal gas to be purified enters the shell from the air inlet, flows forward horizontally along its inner cavity, and reacts with the fillers in the passing filler area in turn to achieve purification. The filler can be controlled by the automatic feeding control device above the filler area to achieve online feeding, and can be controlled by the automatic discharging control device below to achieve online discharging, which can achieve the effect of controlling the filler to flow downward during the treatment process to replace the filler online. Therefore, the equipment has the characteristics of simple structure, convenient online replacement of fillers, and high purification efficiency. At the same time, in the equipment, since the automatic discharging control device is set at the lower end of each filler area, the filler in the filler area located in the front of the airflow in each coal gas purification unit can be controlled to be sent to the rear filler area for treatment in turn after discharging, so as to achieve the processing mode of countercurrent control of the overall operation of the filler and the direction of the airflow. This countercurrent control processing mode allows the filler to contact with the freshest incoming coal gas before it falls out of the last filler area, which better ensures that the filler achieves the maximum utilization efficiency; and the coal gas also contacts with the freshest incoming filler at the last position before it flows out of the equipment, which also better ensures that the coal gas achieves the maximum treatment effect. Therefore, this method greatly improves the reaction effect between the filler and the gas, ensures the utilization rate of the filler, and avoids the waste of the filler.

[0009] Furthermore, the overall shell is in a horizontal cylindrical shape, so that the pressure at each position of the shell is uniform and stable, reducing the presence of stress concentration positions and wind dead angle positions, and better ensuring the smoothness and stability of the device operation.

[0010] Furthermore, the air filter baffle is a vertical plate with air filter holes uniformly distributed thereon, the diameter of which is smaller than the diameter of the filler. In this way, the structure is simple and the quality strength is guaranteed. As another embodiment, the air filter baffle can also be implemented by a structure such as a grid mesh or a steel wire mesh.

[0011] Furthermore, an air collecting chamber is formed between adjacent filler areas by means of air filter partitions.

[0012] This is because the filler flows from top to bottom in the filler area, which will cause the filler below to be less active than the filler above, so the gas treatment effect of the gas passing below will be worse than that of the gas above. Therefore, a gas collection chamber is set up to allow the gas passing through the previous filler area to be re-collected and mixed before entering the next filler area, avoiding uneven treatment effects between the upper and lower parts resulting in substandard final gas output, and better ensuring the overall treatment effect of the equipment.

[0013] Furthermore, each gas collection chamber is provided with a harmful component detection probe connected to the control center.

[0014] In this way, the processing effect can be better detected and fed back in real time to facilitate control.

[0015] Furthermore, the automatic feeding control device includes a feeding funnel arranged at the center position above the shell corresponding to the filling area position, and also includes a feeding container connected between the feeding funnel and the filling area, 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 with a switch is also arranged on one side of the feeding container, and 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 with a switch is correspondingly arranged on the other side of the feeding container.

[0016] In this way, when feeding, the filler is first introduced into the feeding funnel, the lower switch valve of the feeding is in a closed state, the upper switch valve of the feeding is opened, the filler is first allowed to enter the feeding container, and then the upper switch valve of the feeding 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 feeding 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 feeding is opened, and the filler in the feeding container can flow downward into the filler area by its own weight, realizing the automatic downward flow and 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 area together with the filler, causing deflagration during the reaction and damaging the equipment, thereby improving the safety of the equipment operation.

[0017] 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.

[0018] Furthermore, an oxygen sensor is provided at the outlet of the feed gas replacement and is connected to the control center.

[0019] 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.

[0020] Furthermore, a carbon monoxide sensor is designed at the outlet of the feed gas replacement outlet and is connected to the control center.

[0021] 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 area 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 area inside the shell from overflowing during feeding to cause a safety accident.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] In this way, when the feed container feeds into the packing area, 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.

[0026] In addition, during implementation, a feed retention container can be further connected in series between the lower part of the feed container and the outer shell and connected to the filler area. This is because the structure and function of the above-mentioned automatic feed control 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. 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.

[0027] Furthermore, during implementation, a plurality of pipes can be bifurcated and arranged below the automatic feeding control device along the width direction of the shell to communicate with the filling area. This is because the width direction of the filling area is circular, so the feeding distribution can be more uniform.

[0028] Furthermore, the automatic discharging control device includes a discharging container which is connected to the filling area and is arranged in the center position below the 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 shell. A lower discharging switch valve is arranged between the discharging container and the discharging port. A discharging gas replacement inlet 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. A discharging gas replacement outlet with a switch is correspondingly arranged on the other side of the discharging container.

[0029] 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 reacted filler enters 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 coal gas mixed in the filler can be prevented from leaking out, which improves the safety of equipment operation.

[0030] 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.

[0031] Furthermore, a carbon monoxide sensor is provided at the outlet for gas replacement of the discharging material and is connected to the control center.

[0032] 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.

[0033] Furthermore, an oxygen sensor connected to the control center is also provided at the outlet position for gas replacement of the discharging material.

[0034] In this way, after the filling material 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 filling area in the shell from the automatic discharge control device during the next discharge, causing explosion during the reaction and damaging the equipment, thereby improving the safety of equipment operation.

[0035] 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.

[0036] In this way, the flow regulating switch valve can be used to adjust the size of the discharge speed from the packing area to the discharge container, so that it matches the flow speed of the packing in the packing area, ensures that the flow speed of the packing matches the gas flow rate, and ensures the reaction effect. At the same time, when the 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 is 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.

[0037] 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.

[0038] 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.

[0039] In addition, during implementation, a discharge retention container can be further connected in series between the top of the discharge container and the outer shell to communicate with the filling area. This is because the structure and function of the above-mentioned automatic discharge control 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 filler will first enter the discharge retention container and accumulate when discharging. The discharge retention container can realize uninterrupted continuous discharge inside the filling 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.

[0040] Furthermore, during implementation, a plurality of pipes can be arranged above the automatic discharging control device along the width direction of the shell to be connected to the filling area. This is because the width direction of the filling area is circular, so the discharging can be faster and smoother.

[0041] Furthermore, in each gas purification unit, a material receiving container is provided below each automatic discharge control device, and the material receiving container is connected to the automatic feeding control device (feeding funnel) above the next filling area in the reverse airflow direction through a filling conveying mechanism.

[0042] In this way, the filler conveying mechanism directly connects the fillers in each filler area in series along the direction of counter-flow, realizing the aforementioned processing method of counter-flow control of the overall operation of the filler and the direction of the airflow. The utilization rate of the filler is guaranteed and the inconvenience of manual handling is avoided. When implemented, the filler conveying mechanism can be implemented by existing conveying devices such as chain hook machines or screw conveyors.

[0043] Furthermore, a filler support control mechanism is provided in the filler area, and the filler support control mechanism includes a support plate horizontally arranged along the width direction of the filler area, one side of the support plate is connected to the side wall of the filler area, and the other side is suspended obliquely downward.

[0044] 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 area from being broken by excessive pressure, affecting the reaction effect and gas outlet quality.

[0045] Furthermore, the support plates are arranged in pairs, and each pair of support plates is fixed to the side walls on both sides of the interior of the filling area, and the respective suspended ends are arranged at oblique and staggered intervals relative to each other.

[0046] In this way, there are upward supporting force positions on the entire cross-section of the filler area, 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 purification treatment reaction.

[0047] Furthermore, the supporting plates are arranged in groups along the horizontal direction, each group includes a plurality of pairs of supporting plates arranged in parallel in the horizontal direction, and the staggered interval between two supporting plates in each pair of supporting plates gradually increases from the middle to both sides.

[0048] This is because the overall cross-section of the filler area is circular, so the side walls on both sides will hinder the downward flow of the filler. In this way, without interference, the filler in the middle will flow faster downward while the flow rate at the two sides will be relatively slow, making the reaction of the filler uneven when discharging, and the activity is not uniform, resulting in waste. Therefore, the above structure can control the flow rate of the filler in the middle to slow down, making it closer to the flow rate of the filler on both sides, ensuring the balance of the overall downward flow of the filler, improving the reaction treatment effect of the filler, and avoiding waste.

[0049] Furthermore, a plurality of groups of packing support control mechanisms are arranged in the packing area along the height direction, so that the size of the packing area in the height direction (ie, the diameter of the shell) can be extended as much as possible, thereby improving the treatment effect.

[0050] Furthermore, three groups of gas purification units are arranged in sequence in the horizontal direction in the shell. The filler in the first group of gas purification units uses hydrogen chloride adsorbent filler to form a dechlorination (i.e., deacidification) purification unit, the filler in the second group of gas purification units uses carbonyl sulfide hydrolysis catalyst filler to form a hydrolysis purification unit, and the filler in the third group of gas purification units uses desulfurization adsorbent filler to form a desulfurization purification unit.

[0051] In this way, three units are connected in series and different fillers are used to react and treat the coal gas, so that the fine desulfurization process of the coal gas can be achieved.

[0052] Therefore, this solution is used for the desulfurization of coal gas and can realize the fine desulfurization process. In principle, the solution eliminates the problems of deflagration and pollutant leakage during the loading / discharging of materials (catalysts / adsorbents), greatly improves the overall operation safety, and significantly improves the purification efficiency of pollutants. In addition, this solution 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 gas purification is in a high-efficiency and stable operation state for a long time.

[0053] Therefore, in summary, the present application has the advantages of higher filler utilization efficiency, higher desulfurization efficiency, better effect, convenient process control, good safety, lower equipment cost, etc., and is particularly suitable for the fine desulfurization process of blast furnace gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 The schematic diagram of the structure of the integrated horizontal flow blast furnace gas purification equipment used in the embodiment of the utility model is shown in FIG. The arrows in the figure indicate the gas flow direction in the gas flow channel.

[0055] Figure 2 for Figure 1 Schematic diagram of the structure of a single packing area.

[0056] Figure 3 for Figure 1 A left-side cross-sectional view of the interior of the packing area is shown in . DETAILED DESCRIPTION

[0057] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0058] Best embodiment: An integral horizontal flow blast furnace gas purification device, see Figure 1-3The invention comprises a horizontally arranged long strip shell 1, an air inlet 2 is arranged at one end of the shell 1, and an air outlet 3 is arranged at the other end. At least one gas purification unit is arranged in the shell 1 along the length direction. A plurality of vertical gas filter baffles 4 (referring to baffles through which gas can be filtered but fillers cannot pass) are arranged in parallel at intervals inside the gas purification unit to form a plurality of horizontally arranged filler areas 5. An automatic feeding control device is correspondingly arranged above each filler area 5, and an automatic discharging control device is arranged below the filler area.

[0059] In this way, when the equipment is running, the coal gas to be purified enters the shell from the air inlet, flows forward horizontally along its inner cavity, and reacts with the fillers in the passing filler area in turn to achieve purification. The filler can be controlled by the automatic feeding control device above the filler area to achieve online feeding, and can be controlled by the automatic discharging control device below to achieve online discharging, which can achieve the effect of controlling the filler to flow downward during the treatment process to replace the filler online. Therefore, the equipment has the characteristics of simple structure, convenient online replacement of fillers, and high purification efficiency. At the same time, in the equipment, since the automatic discharging control device is set at the lower end of each filler area, the filler in the filler area located in the front of the airflow in each coal gas purification unit can be controlled to be sent to the rear filler area for treatment in turn after discharging, so as to achieve the processing mode of countercurrent control of the overall operation of the filler and the direction of the airflow. This countercurrent control processing mode allows the filler to contact with the freshest incoming coal gas before it falls out of the last filler area, which better ensures that the filler achieves the maximum utilization efficiency; and the coal gas also contacts with the freshest incoming filler at the last position before it flows out of the equipment, which also better ensures that the coal gas achieves the maximum treatment effect. Therefore, this method greatly improves the reaction effect between the filler and the gas, ensures the utilization rate of the filler, and avoids the waste of the filler.

[0060] The housing 1 is in a horizontal cylindrical shape as a whole, so that the pressure at each position of the housing is uniform and stable, which reduces the presence of stress concentration positions and wind dead angle positions, and better ensures the smoothness and stability of the device operation.

[0061] The air filter baffle 4 is a vertical plate evenly distributed with air filter holes whose diameter is smaller than the filler diameter. In this way, the structure is simple and the quality strength is guaranteed. As other embodiments, the air filter baffle can also be implemented by a grid mesh or a steel wire mesh.

[0062] Among them, an air collection chamber 6 is formed between each adjacent filler area 5 by means of an air filter partition plate 4.

[0063] This is because the filler flows from top to bottom in the filler area, which will cause the filler below to be less active than the filler above, so the gas treatment effect of the gas passing below will be worse than that of the gas above. Therefore, a gas collection chamber is set up to allow the gas passing through the previous filler area to be re-collected and mixed before entering the next filler area, avoiding uneven treatment effects between the upper and lower parts resulting in substandard final gas output, and better ensuring the overall treatment effect of the equipment.

[0064] Wherein, each air collecting chamber is provided with a harmful component detection probe 7 connected to a control center (not shown).

[0065] In this way, the processing effect can be better detected and fed back in real time to facilitate control.

[0066] Among them, the automatic feeding control device includes a feeding funnel 8 arranged at the center position above the shell corresponding to the filling area position, and also includes a feeding container 9 connected between the feeding funnel and the filling area, an upper feeding switch valve 10 is arranged between the feeding funnel and the feeding container, and a lower feeding switch valve 11 is arranged between the feeding container and the shell. A feeding gas replacement inlet 12 with a switch is also arranged on one side of the feeding container 9. The feeding gas replacement inlet 12 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 feeding gas replacement outlet 13 with a switch is correspondingly arranged on the other side of the feeding container 9.

[0067] In this way, when feeding, the filler is first introduced into the feeding funnel, the lower switch valve of the feeding is in a closed state, the upper switch valve of the feeding is opened, the filler is first allowed to enter the feeding container, and then the upper switch valve of the feeding 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 feeding 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 feeding is opened, and the filler in the feeding container can flow downward into the filler area by its own weight, realizing the automatic downward flow and 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 area together with the filler, causing deflagration during the reaction and damaging the equipment, thereby improving the safety of the equipment operation.

[0068] 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.

[0069] Among them, an oxygen sensor is also provided at the feed gas replacement outlet 13 and is connected to the control center (not shown in the figure).

[0070] 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.

[0071] The feed gas replacement outlet 13 is also provided with a carbon monoxide sensor connected to the control center (not shown in the figure).

[0072] 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 area 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 area inside the shell from overflowing during feeding to cause a safety accident.

[0073] The feed upper switch valve 10 comprises two switch valves 10 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.

[0074] 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.

[0075] The feed lower switch valve 11 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.

[0076] In this way, when the feed container feeds into the packing area, 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.

[0077] In addition, during implementation, a feed retention container can be further connected in series between the lower part of the feed container and the outer shell to communicate with the filler area. This is because the structure and function of the above-mentioned automatic feed control 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 feed cessation on the reaction during the air removal process. Among them, 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.

[0078] In the implementation, a plurality of pipes can be arranged below the automatic feeding control device along the width direction of the shell to be connected with the filling area 5. This is because the width direction of the filling area is circular, so the feeding distribution can be more uniform.

[0079] Among them, the automatic discharging control device includes a discharging container 15 which is connected to the filling area and is arranged in the middle position below the shell. The lower end of the discharging container 15 is downwardly provided with a discharging port, an upper discharging switch valve 16 is arranged between the discharging container 15 and the shell 1, and a lower discharging switch valve 17 is arranged between the discharging container 15 and the discharging port. A discharging gas replacement inlet 18 equipped with a switch is also arranged on one side of the discharging container 15. The discharging gas replacement inlet 18 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 19 equipped with a switch is correspondingly arranged on the other side of the discharging container 15.

[0080] 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 reacted filler enters 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 coal gas mixed in the filler can be prevented from leaking out, which improves the safety of equipment operation.

[0081] 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.

[0082] A carbon monoxide sensor is also provided at the gas replacement outlet 19 for discharging and is connected to the control center (not shown).

[0083] 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.

[0084] Among them, an oxygen sensor is also provided at the outlet for gas replacement of the discharging material and is connected to the control center (not shown).

[0085] In this way, after the filling material 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 filling area in the shell from the automatic discharge control device during the next discharge, causing explosion during the reaction and damaging the equipment, thereby improving the safety of equipment operation.

[0086] The discharge upper switch valve 16 comprises two switch valves 16 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.

[0087] In this way, the flow regulating switch valve can be used to adjust the size of the discharge speed from the packing area to the discharge container, so that it matches the flow speed of the packing in the packing area, ensures that the flow speed of the packing matches the gas flow rate, and ensures the reaction effect. At the same time, when the 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 is 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.

[0088] The discharge lower 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.

[0089] 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.

[0090] In addition, during implementation, a discharge retention container can be further connected in series between the top of the discharge container and the outer shell to communicate with the filling area. This is because the structure and function of the above-mentioned automatic discharge control 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 filler will first enter the discharge retention container and accumulate when discharging. The discharge retention container can realize uninterrupted continuous discharge inside the filling 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 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 according to needs.

[0091] In the implementation, a plurality of pipes can be arranged above the automatic discharging control device along the width direction of the housing 1 to be connected to the filling area. This is because the width direction of the filling area is circular, so the discharging can be faster and smoother.

[0092] Among them, in each gas purification unit, a material receiving container is also arranged below each automatic discharge control device, and the material receiving container is connected to the automatic feeding control device (feeding funnel) above the next filling area in the reverse airflow direction through a filling conveying mechanism (not shown in the figure).

[0093] In this way, the filler conveying mechanism directly connects the fillers in each filler area in series along the direction of counter-flow, realizing the aforementioned processing method of counter-flow control of the overall operation of the filler and the direction of the airflow. The utilization rate of the filler is guaranteed and the inconvenience of manual handling is avoided. When implemented, the filler conveying mechanism can be implemented by existing conveying devices such as chain hook machines or screw conveyors.

[0094] A filler support control mechanism is also provided in the filler area 5, and the filler support control mechanism includes a support plate 21 horizontally arranged along the width direction of the filler area, one side of the support plate 21 is connected to the side wall of the filler area, and the other side is suspended obliquely downward.

[0095] 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 area from being broken by excessive pressure, affecting the reaction effect and gas outlet quality.

[0096] The supporting plates 21 are arranged in pairs, and each pair of supporting plates is fixed on the side walls on both sides of the inner side of the filling area, and the respective suspended ends are arranged at oblique and staggered intervals relative to each other.

[0097] In this way, there are upward supporting force positions on the entire cross-section of the filler area, 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 purification treatment reaction.

[0098] The supporting plates 21 are arranged in groups along the horizontal direction, each group includes a plurality of pairs of supporting plates arranged in parallel in the horizontal direction, and the staggered interval between two supporting plates in each pair of supporting plates gradually increases from the middle to both sides.

[0099] This is because the overall cross-section of the filler area is circular, so the side walls on both sides will hinder the downward flow of the filler. In this way, without interference, the filler in the middle will flow faster downward while the flow rate at the two sides will be relatively slow, making the reaction of the filler uneven when discharging, and the activity is not uniform, resulting in waste. Therefore, the above structure can control the flow rate of the filler in the middle to slow down, making it closer to the flow rate of the filler on both sides, ensuring the balance of the overall downward flow of the filler, improving the reaction treatment effect of the filler, and avoiding waste.

[0100] Among them, multiple groups of packing support control mechanisms are arranged in the packing area along the height direction, so that the height dimension of the packing area (i.e. the diameter of the shell) can be extended as much as possible, thereby improving the treatment effect.

[0101] Among them, three groups of gas purification units are arranged in sequence in the horizontal direction inside the shell (see Figure 1The three groups of gas purification units are distinguished by dotted lines in the figure). The fillers in the first group of gas purification units are hydrogen chloride adsorbent fillers to form a dechlorination (i.e., deacidification) purification unit, the fillers in the second group of gas purification units are carbonyl sulfide hydrolysis catalyst fillers to form a hydrolysis purification unit, and the fillers in the third group of gas purification units are desulfurization adsorbent fillers to form a desulfurization purification unit.

[0102] In this way, three units are connected in series and different fillers are used to react and treat the coal gas, so that the fine desulfurization process of the coal gas can be achieved.

[0103] Therefore, this solution is used for the desulfurization of coal gas and can realize the fine desulfurization process. In principle, the solution eliminates the problems of deflagration and pollutant leakage during the loading / discharging of materials (catalysts / adsorbents), greatly improves the overall operation safety, and significantly improves the purification efficiency of pollutants. In addition, this solution 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 gas purification is in a high-efficiency and stable operation state for a long time.

Claims

1. An integral horizontal flow blast furnace gas purification device, characterized in that: The invention comprises a horizontally arranged long strip housing, an air inlet is arranged at one end of the housing, and an air outlet is arranged at the other end, at least one gas purification unit is arranged in the housing along the length direction, a plurality of vertical gas filter baffles are arranged in parallel at intervals inside the gas purification unit to form a plurality of horizontally arranged filling areas, an automatic feeding control device is arranged above each filling area, and an automatic discharging control device is arranged below the filling area; The automatic feeding control device includes a feeding funnel arranged at the center position above the shell corresponding to the filling area position, and also includes a feeding container connected between the feeding funnel and the filling area, an upper feeding switch valve is arranged between the feeding funnel and the feeding container, and a lower feeding switch valve is arranged between the feeding container and the shell. A feeding gas replacement inlet 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 with a switch is correspondingly arranged on the other side of the feeding container.

2. The integrated horizontal flow blast furnace gas purification equipment according to claim 1, characterized in that: The air filter baffle is a vertical plate with evenly distributed air filter holes whose diameter is smaller than the filler diameter.

3. The integrated horizontal flow blast furnace gas purification equipment according to claim 2, characterized in that: An air collecting chamber is formed between adjacent filler areas separated by air filter partitions.

4. The integrated horizontal flow blast furnace gas purification equipment according to claim 3, characterized in that: Each gas collection chamber is provided with a harmful component detection probe which is connected to the control center.

5. The integrated horizontal flow blast furnace gas purification equipment according to claim 1, characterized in that: The safety gas is nitrogen; 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; A plurality of pipelines are bifurcated and arranged below the automatic feeding control device along the width direction of the shell and are connected with the filling area.

6. The integrated horizontal flow blast furnace gas purification equipment according to claim 1, characterized in that: The automatic discharging control device comprises a discharging container which is connected to the filling area and is arranged at the center position below the 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 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. A discharging gas replacement outlet equipped with a switch is correspondingly arranged on the other side of the discharging container.

7. The integrated horizontal flow blast furnace gas purification equipment according to claim 6, characterized in that: The safety gas is nitrogen; 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; A plurality of pipes are bifurcated above the automatic discharging control device along the width direction of the shell and are connected to the filling area.

8. The integrated horizontal flow blast furnace gas purification equipment according to claim 1, characterized in that: In each coal gas purification unit, a material receiving container is also provided below each automatic material discharging control device, and the material receiving container is connected to the automatic material feeding control device above the next filling area in the reverse direction of the air flow through the filling conveying mechanism.

9. The integrated horizontal flow blast furnace gas purification equipment according to claim 1, characterized in that: A packing support control mechanism is also provided in the packing area, and the packing support control mechanism includes a support plate horizontally provided along the width direction of the packing area, one side of the support plate is connected to the side wall of the packing area, and the other side is suspended obliquely downward; The supporting plates are arranged in pairs, each pair of supporting plates is fixed to the side walls on both sides of the inner side of the filling area, and the free ends of each pair are arranged at an oblique and staggered interval relative to each other; The supporting plates are arranged in groups along the horizontal direction, each group includes a plurality of pairs of supporting plates arranged in parallel in the horizontal direction, and the staggered interval between the two supporting plates in each pair of supporting plates gradually increases from the middle to the two sides; Three groups of gas purification units are arranged in sequence along the horizontal direction in the shell. The filler in the first group of gas purification units uses hydrogen chloride adsorbent filler to form a dechlorination purification unit, the filler in the second group of gas purification units uses carbonyl sulfide hydrolysis catalyst filler to form a hydrolysis purification unit, and the filler in the third group of gas purification units uses desulfurization adsorbent filler to form a desulfurization purification unit.

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