Blast furnace gas desulfurization tower device

Abstract

The utility model relates to the technical field of desulfurization towers, in particular to a blast furnace gas desulfurization tower device which comprises a tower body, and a discharging bin, a gas inlet bin, a pretreatment bin, a gas heating and temperature adjusting bin, a hydrolysis bin, a cooling bin, a desulfurization bin, a gas outlet bin and a medicament adding bin are sequentially arranged in the tower body from bottom to top. A heat exchanger used for heating is arranged in the coal gas heating and temperature adjusting bin, an organic sulfur hydrolytic agent is arranged in the hydrolysis bin, a heat exchanger used for cooling is arranged in the cooling bin, a desulfurizing agent is arranged in the desulfurizing bin, a plurality of chemical adding bins used for conveying chemicals are arranged at the top end of the tower body, and the bottom ends of the chemical adding bins are all communicated with a feeding pipe. The pretreatment bin, the hydrolysis bin and the desulfurization bin are all communicated with a blanking pipe. Therefore, the device disclosed by the utility model can simultaneously realize the functions of pretreatment, hydrolysis, hydrogen sulfide absorption and the like, meets the lower emission requirements of most users, and is simple, convenient to operate and small in occupied area.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization towers, in particular to a blast furnace gas desulfurization tower device. Background Art

[0002] Sulfides in blast furnace gas mainly exist in the form of organic sulfur components such as carbonyl sulfide and carbon disulfide, as well as inorganic sulfur such as hydrogen sulfide, of which carbonyl sulfide accounts for about 70%. These sulfur-containing components will produce sulfur dioxide pollution emissions in subsequent production processes such as boilers, hot blast stoves, and heating furnaces. To achieve standard emissions of sulfur dioxide in flue gas after combustion, the sulfur-containing components in the gas must be removed. Compared with hydrogen sulfide, carbonyl sulfide has stable chemical properties and cannot be removed by simple absorption or adsorption. Therefore, the difficulty of fine desulfurization of blast furnace gas lies mainly in the removal of carbonyl sulfide.

[0003] The current desulfurization process is divided into source control and end-of-pipe control. Source control is to remove organic sulfur and hydrogen sulfide from blast furnace gas first. Organic sulfur is relatively stable and difficult to remove directly by conventional methods. Therefore, the main difficulty in removing blast furnace gas lies in removing the organic sulfur component. Generally, the organic sulfur is converted into inorganic sulfur (hydrogen sulfide) before removal. After the purified blast furnace gas is burned again, the SO2 in its flue gas can meet the emission standards. End-of-pipe control is to remove SO2 from the flue gas after the blast furnace gas is burned to meet the emission standards. Due to the problems of many application scenarios, large flue gas volume, scattered equipment, and scattered management in end-of-pipe control, environmental protection departments in various places have successively issued policies to encourage the implementation of source control of blast furnace gas, and implement gas fine desulfurization before sending it to various use points, which is convenient for centralized management and reduces the burden of end-of-pipe control.

[0004] How to simultaneously achieve functions such as pretreatment, hydrolysis and hydrogen sulfide absorption to meet the lower emission requirements of most users, with simple equipment, convenient operation and small footprint, has become a technical problem that needs to be broken through.

[0005] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0006] In view of the above-mentioned defects, the purpose of the utility model is to provide a blast furnace gas desulfurization tower device, which has a simple structure and can simultaneously realize functions such as pretreatment, hydrolysis and hydrogen sulfide absorption, meeting the lower emission requirements of most users, and the device is simple, easy to operate and occupies a small area.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a blast furnace gas desulfurization tower device, including a tower body, wherein the interior of the tower body is sequentially provided with a unloading bin, a gas inlet bin, a pretreatment bin, a gas heating and temperature adjustment bin, a hydrolysis bin, a cooling bin, a desulfurization bin, a gas outlet bin and a reagent adding bin from bottom to top, wherein the pretreatment bin is provided with a dechlorination agent, the gas heating and temperature adjustment bin is provided with a heat exchanger for heating, the hydrolysis bin is provided with an organic sulfur hydrolyzing agent, the cooling bin is provided with a heat exchanger for cooling, and the desulfurization bin is provided with a desulfurizing agent.

[0008] The top of the tower body is provided with a plurality of dosing bins for conveying reagents, the bottom ends of the plurality of dosing bins are connected to the feed pipes, the pretreatment bin, the hydrolysis bin and the desulfurization bin are connected to the drop pipes, the bottom ends of the drop pipes are inserted into the unloading bin, and the drop pipes in the unloading bin are provided with unloading valves.

[0009] According to the blast furnace gas desulfurization tower device of the utility model, the heat exchanger includes a symmetrically arranged upper plate and a lower plate, the upper plate and the lower plate are provided with a mounting groove at one end away from the symmetry center, the upper plate and the lower plate in the mounting groove are provided with through holes that match each other, the upper plate and the lower plate are provided with a heat conduction cavity, the heat conduction cavity is provided with a heat transfer medium, one end of the heat conduction cavity is connected to the inlet, and the other end of the heat conduction cavity is connected to the outlet, an adjustment plate is rotatably connected between the upper plate and the lower plate, and the adjustment plate is provided with a plurality of guide holes that match the through holes.

[0010] According to the blast furnace gas desulfurization tower device of the utility model, the diameter of the middle part of the guide hole is larger than the diameter of the upper part of the guide hole and the diameter of the lower part of the guide hole.

[0011] According to the blast furnace gas desulfurization tower device of the utility model, a plurality of connecting rods are arranged in the through holes, and the connecting rods are connected to the heat conduction cavity.

[0012] According to the blast furnace gas desulfurization tower device of the utility model, the feed pipe for conveying the dechlorination agent is connected to the pretreatment bin, the feed pipe for conveying the organic sulfur hydrolyzing agent is connected to the hydrolysis bin, and the feed pipe for conveying the desulfurizing agent is connected to the desulfurization bin.

[0013] According to the blast furnace gas desulfurization tower device of the utility model, conical platforms are provided in the pretreatment chamber, the hydrolysis chamber and the desulfurization chamber, and the bottom ends of the conical platforms are connected to the drop pipes.

[0014] The purpose of the utility model is to provide a blast furnace gas desulfurization tower device, including a discharge bin, a gas inlet bin, a pretreatment bin, a gas heating and temperature adjustment bin, a hydrolysis bin, a cooling bin, a desulfurization bin, a gas outlet bin and a reagent adding bin, which can simultaneously realize the functions of pretreatment, hydrolysis and hydrogen sulfide absorption, meet the lower emission requirements of most users, and the device is simple, easy to operate, and occupies a small area; the adjustment plate is rotated to adjust the overlapping area of ​​the guide hole and the through hole on the plate, so as to adjust the ventilation volume; the diameter of the middle part of the guide hole is larger than the diameter of the upper part of the guide hole and the diameter of the lower part of the guide hole, so as to slow down the gas passing speed and improve the heating effect. In summary, the beneficial effects of the utility model are: it can simultaneously realize the functions of pretreatment, hydrolysis and hydrogen sulfide absorption, meet the lower emission requirements of most users, and the device is simple, easy to operate, and occupies a small area. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a longitudinal sectional view of the utility model;

[0016] Figure 2 It is the structural diagram of the heat exchanger;

[0017] Figure 3 It is a longitudinal cross-sectional view of the heat exchanger;

[0018] In the figure: 1-tower body, 2-unloading bin, 3-gas inlet bin, 4-pretreatment bin, 5-gas heating and temperature adjustment bin, 6-hydrolysis bin, 7-cooling bin, 8-desulfurization bin, 9-gas outlet bin, 10-heat exchanger, 101-upper plate, 102-lower plate, 103-through hole, 104-heat conduction cavity, 105-connecting rod, 106-inlet, 107-outlet, 108-adjusting plate, 109-guide hole, 11-medicament adding bin, 12-feeding pipe, 13-dropping pipe, 14-unloading valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", "top / bottom" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0021] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "sleeved / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0022] See also Figure 1 to Figure 3 The utility model provides a blast furnace gas desulfurization tower device, including a tower body 1, wherein a plurality of independent chambers are arranged inside the tower body 1, which are, from bottom to top, a discharge chamber 2, a gas inlet chamber 3, a pretreatment chamber 4, a gas heating and temperature adjustment chamber 5, a hydrolysis chamber 6, a cooling chamber 7, a desulfurization chamber 8, a gas outlet chamber 9 and a reagent adding chamber 11. After the gas passes through the blast furnace gas residual pressure turbine power generation device (TRT), the temperature is relatively low. The gas enters from the inlet chamber 3 and flows from bottom to top. It is first pretreated in the pretreatment chamber 4. The pretreatment chamber 4 is filled with a dechlorination agent to remove the chlorine-containing substances in the gas. After the dechlorination treatment, the gas enters the gas heating chamber 11. The temperature regulating bin 5 is provided with a heat exchanger 10 for heating the gas, and the temperature of the gas is raised to between 80 and 140°C. The heated gas enters the hydrolysis bin 6, and the hydrolysis bin 6 is filled with an organic sulfur hydrolyzing agent, and the organic sulfur in the gas is hydrolyzed into inorganic sulfur such as hydrogen sulfide. The gas treated in the hydrolysis bin 6 continues to enter the cooling bin 7 upward, and the cooling bin 7 is provided with a heat exchanger 10 for cooling, and the temperature of the gas is reduced to between 60 and 90°C. The cooled gas enters the desulfurization bin 8, and the desulfurization bin 8 is equipped with a special desulfurizing agent for finally removing sulfur-containing substances. The treated gas is discharged from the gas outlet bin 9 and enters each user end.

[0023] See also Figure 1 to Figure 3 A plurality of reagent adding bins 11 are arranged at the top of the tower body 1, and the bottom ends of the plurality of reagent adding bins 11 are connected to a feed pipe 12. The feed pipe 12 for conveying a dechlorinating agent is connected to the pretreatment bin 4, the feed pipe 12 for conveying an organic sulfur hydrolyzing agent is connected to the hydrolysis bin 6, and the feed pipe 12 for conveying a desulfurizing agent is connected to the desulfurizing bin 8. The pretreatment bin 4, the hydrolysis bin 6 and the desulfurizing bin 8 are all provided with a breathable conical platform for containing fillers (i.e., dechlorinating agent, organic sulfur hydrolyzing agent and desulfurizing agent). The bottom ends of the conical platforms are all connected to a drop pipe 13, and the bottom ends of the drop pipes 13 are all penetrated into the unloading bin 2. The drop pipes 13 in the unloading bin 2 are all provided with a unloading valve 14. When unloading, the waste is unloaded from the drop pipe 13 to the unloading bin 2 through the unloading valve 14, and then transported out.

[0024] See also Figure 1 to Figure 3The heat exchangers 10 each include an upper plate 101 and a lower plate 102 that are symmetrically arranged. The upper plate 101 and the lower plate 102 are each provided with a mounting groove at one end away from the symmetry center. The upper plate 101 and the lower plate 102 in the mounting groove are each provided with a through hole 103 that matches each other. The upper plate 101 and the lower plate 102 are each provided with a heat conduction cavity 104. The heat conduction cavity 104 is provided with a heat transfer medium (for example, the heat transfer medium in the heat exchanger 10 for heating is heat conduction oil, and the heat transfer medium in the heat exchanger 11 for cooling is circulating water). One end of the heat conduction cavity 104 is connected to an inlet 106, and the other end of the heat conduction cavity 104 is connected to an outlet 107. , a plurality of connecting rods 105 are provided in the through holes 103, and the connecting rods 105 are connected to the heat conduction cavity 104, and an adjusting plate 108 is rotatably connected between the upper plate 101 and the lower plate 102, and the adjusting plate 108 is tightly connected to the upper plate 101 and the lower plate 102 (that is, the friction between the adjusting plate 108 and the upper plate 101 and the lower plate 102 is very large, and no relative rotation will occur without external interference), and a plurality of guide holes 109 cooperating with the through holes 103 are provided on the adjusting plate 108, and the adjusting plate 108 is rotated to adjust the area of ​​the guide holes 109 on the adjusting plate 108 overlapping with the through holes 103, thereby adjusting the ventilation volume.

[0025] See also Figure 1 to Figure 3 Preferably, the diameter of the middle portion of the guide hole 109 is larger than the diameter of the upper portion of the guide hole 109 and the diameter of the lower portion of the guide hole 109, so as to slow down the passage speed of the gas and improve the heating effect.

[0026] See also Figure 1 to Figure 3 When installing the heat exchanger 10, rotate the adjusting plate 108 according to the tower body 1 or the amount of processed gas, adjust the overlapping area of ​​the guide hole 109 on the adjusting plate 108 and the through hole 103, check the amount of dechlorination agent, organic sulfur hydrolyzing agent and desulfurizing agent, and after the heat transfer medium is introduced into the heat exchanger 10, the gas can be introduced into the air inlet bin 3 to start the desulfurization treatment.

[0027] The utility model provides a blast furnace gas desulfurization tower device, including a discharge bin, a gas inlet bin, a pretreatment bin, a gas heating and temperature adjustment bin, a hydrolysis bin, a cooling bin, a desulfurization bin, a gas outlet bin and a reagent adding bin, which can simultaneously realize the functions of pretreatment, hydrolysis and hydrogen sulfide absorption, meet the lower emission requirements of most users, and the device is simple, easy to operate, and occupies a small area; the adjustment plate is rotated to adjust the overlapping area of ​​the guide hole and the through hole on the plate, so as to adjust the ventilation volume; the diameter of the middle part of the guide hole is larger than the diameter of the upper part of the guide hole and the diameter of the lower part of the guide hole, so as to delay the gas passing speed and improve the heating effect. In summary, the beneficial effects of the utility model are: it can simultaneously realize the functions of pretreatment, hydrolysis and hydrogen sulfide absorption, meet the lower emission requirements of most users, and the device is simple, easy to operate, and occupies a small area.

[0028] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A blast furnace gas desulfurization tower device, characterized in that: It comprises a tower body, wherein the inside of the tower body is sequentially provided with a discharge bin, a gas inlet bin, a pretreatment bin, a gas heating and temperature adjustment bin, a hydrolysis bin, a cooling bin, a desulfurization bin, a gas outlet bin and a reagent adding bin from bottom to top, wherein the pretreatment bin is provided with a dechlorination reagent, the gas heating and temperature adjustment bin is provided with a heat exchanger for heating, the hydrolysis bin is provided with an organic sulfur hydrolyzing agent, the cooling bin is provided with a heat exchanger for cooling, and the desulfurization bin is provided with a desulfurizing agent; The top of the tower body is provided with a plurality of dosing bins for conveying reagents, the bottom ends of the plurality of dosing bins are connected to the feed pipes, the pretreatment bin, the hydrolysis bin and the desulfurization bin are connected to the drop pipes, the bottom ends of the drop pipes are inserted into the unloading bin, and the drop pipes in the unloading bin are provided with unloading valves.

2. The blast furnace gas desulfurization tower device according to claim 1, characterized in that: The heat exchanger includes a symmetrically arranged upper plate and a lower plate, and the upper plate and the lower plate are provided with a mounting groove at one end away from the symmetry center, and the upper plate and the lower plate in the mounting groove are provided with through holes that match each other, and the upper plate and the lower plate are provided with a heat conduction cavity, and the heat conduction cavity is provided with a heat transfer medium, one end of the heat conduction cavity is connected to an inlet, and the other end of the heat conduction cavity is connected to an outlet, and an adjustment plate is rotatably connected between the upper plate and the lower plate, and the adjustment plate is provided with a plurality of guide holes that match the through holes.

3. The blast furnace gas desulfurization tower device according to claim 2, characterized in that: The diameter of the middle portion of the guide hole is larger than the diameter of the upper portion of the guide hole and the diameter of the lower portion of the guide hole.

4. The blast furnace gas desulfurization tower device according to claim 2, characterized in that: A plurality of connecting rods are arranged in the through holes, and the connecting rods are connected to the heat conduction cavity.

5. The blast furnace gas desulfurization tower device according to claim 1, characterized in that: The feed pipe for conveying the dechlorination agent is connected to the pretreatment bin, the feed pipe for conveying the organic sulfur hydrolyzing agent is connected to the hydrolysis bin, and the feed pipe for conveying the desulfurizing agent is connected to the desulfurizing bin.

6. The blast furnace gas desulfurization tower device according to claim 1, characterized in that: Cone-shaped platforms are provided in the pretreatment bin, the hydrolysis bin and the desulfurization bin, and the bottom ends of the conical platforms are connected to the drop pipes.

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