Pretreatment tower for pressure swing adsorption decarbonization device

Abstract

The utility model provides a pretreatment tower for a pressure swing adsorption decarburization device, which comprises a pretreatment tower body which comprises a gas inlet positioned at the top, a dechlorination section positioned at the upper section, a desulfurization section positioned at the lower section and a gas outlet positioned at the bottom; the gas distributor is arranged at the gas inlet; the two catalyst supporting plates are respectively arranged in the dechlorination section and the desulfurization section; the lower notch gas collector is arranged at the gas outlet; the temperature sensor is arranged at the middle section of the desulfurization section; the primary water supply pipe is connected to the middle section of the dechlorination section; the primary water supply valve is arranged on the primary water supply pipe and is electrically connected with the temperature sensor; and a blow-off water pipe. A dechlorination tower and a desulfurization tower are combined into one, the upper section in the tower is a dechlorination section, and the lower section in the tower is a desulfurization section. Raw material gas enters from the tower top, after HCL in the blast furnace gas is removed through the dechlorination section, the raw material gas enters the desulfurization section to remove H2S in the blast furnace gas, and then the blast furnace gas flows out from the gas collecting pipe at the bottom of the tower.

Description

Technical Field

[0001] The utility model belongs to the field of raw gas pretreatment, in particular to a pretreatment tower used for a pressure swing adsorption decarbonization device. Background Art

[0002] The conventional approach to raw gas pretreatment is to connect two towers, a dechlorination tower and a desulfurization tower, in series. This complex process requires numerous towers, pipelines, valves, and supporting instruments, resulting in high investment costs. Utility Model Content

[0003] An object of the present invention is to provide a pretreatment tower for a pressure swing adsorption decarbonization device, and to provide at least the advantages to be described later.

[0004] Another object of the utility model is to provide a pretreatment tower for a pressure swing adsorption decarbonization system, combining a dechlorination tower and a desulfurization tower into one. The upper section of the tower is a dechlorination section, and the lower section is a desulfurization section. Feed gas enters the tower from the top, passes through the dechlorination section to remove HCl from the blast furnace gas, and then enters the desulfurization section to remove H2S from the blast furnace gas. The blast furnace gas then flows out through a gas header at the bottom of the tower.

[0005] The technical solution of the utility model is as follows:

[0006] A pretreatment tower for a pressure swing adsorption decarbonization device, comprising:

[0007] The pretreatment tower body includes an air inlet at the top, a dechlorination section at the upper section, a desulfurization section at the lower section, and an air outlet at the bottom;

[0008] a gas distributor, which is arranged at the gas inlet;

[0009] two catalyst support plates, which are respectively arranged in the dechlorination section and the desulfurization section;

[0010] a lower notch air collector, which is arranged at the air outlet;

[0011] a temperature sensor, which is arranged in the middle section of the desulfurization section;

[0012] a primary water supply pipe connected to the middle section of the dechlorination section;

[0013] a primary water supply valve, which is provided on the primary water supply pipe and is electrically connected to the temperature sensor;

[0014] and a sewage discharge pipe located at the bottom of the pretreatment tower body;

[0015] in,

[0016] The dechlorination section and the desulfurization section are connected in series.

[0017] Preferably, in the pretreatment tower for the pressure swing adsorption decarbonization device, the height-to-diameter ratio of the pretreatment tower body is 5-7.

[0018] Preferably, in the pretreatment tower for the pressure swing adsorption decarbonization device, the catalyst support plate is supported by a Johnson grid.

[0019] Preferably, in the pretreatment tower for the pressure swing adsorption decarbonization device, the air inlet is connected to the blast furnace gas transmission pipe.

[0020] Preferably, in the pretreatment tower for the pressure swing adsorption decarbonization device,

[0021] A manual valve is provided upstream and downstream of the primary water supply valve, respectively, and the two manual valves and the primary water supply valve form a regulating pipeline;

[0022] The regulating pipeline is also connected in parallel with a backup bypass, and a backup valve is provided on the backup bypass.

[0023] The utility model has the following beneficial effects:

[0024] 1. Adopting the two-in-one design concept, HCL and H2S are removed in one tower, with advanced technology, reduced equipment quantity and reasonable process design.

[0025] 2. A gas distributor is set at the inlet to evenly distribute the incoming gas over the entire cross section, reducing the impact on the catalyst and ensuring that the gas passes through the catalyst bed evenly.

[0026] 3. Reasonably design the height-to-diameter ratio of the tower. The height-to-diameter ratio of the pretreatment tower is 5-7. The cross-sectional flow rate of the tower is reasonable to ensure low bed resistance under the condition of uniform distribution. The resistance passing through the bed side is low.

[0027] 3. The catalyst is supported by Johnson grid mesh, which has the advantages of being non-clogging, high-precision screen slots, easy to clean, low pressure loss, long life, low maintenance costs, and high hardness. The V-shaped surface wire forms a wedge-shaped gap, effectively preventing clogging and providing high support strength.

[0028] 4. The bottom outlet adopts the lower end notch to collect gas, which ensures the uniform distribution of gas pressure in the tower and reduces the impact of gas on the outlet pipe.

[0029] 5. A thermometer is installed in the H2S removal section and is interlocked with the primary water inlet regulating valve. When the bed temperature rises above a certain value, the primary water regulating valve is opened and water is sprayed into the bed to prevent the catalyst temperature from being too high. The water is discharged from the sewage pipe at the bottom of the tower.

[0030] Other advantages, objectives and features of the present invention will be reflected in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of an embodiment of a pretreatment tower for a pressure swing adsorption decarbonization device provided by the utility model. DETAILED DESCRIPTION

[0032] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] It should be understood that terms such as “having,” “including,” and “comprising” used herein do not preclude the existence or addition of one or more other elements or combinations thereof.

[0034] like Figure 1 As shown, the utility model provides a pretreatment tower for a pressure swing adsorption decarbonization device, which includes:

[0035] The pretreatment tower body includes an air inlet at the top, a dechlorination section 1 at the upper section, a desulfurization section 2 at the lower section, and an air outlet at the bottom;

[0036] A gas distributor 3, which is arranged at the gas inlet;

[0037] Two catalyst support plates 4, which are respectively arranged in the dechlorination section 1 and the desulfurization section 2;

[0038] a lower notch air collector 5, which is arranged at the air outlet;

[0039] a temperature sensor 6, which is arranged in the middle section of the desulfurization section 2;

[0040] a primary water supply pipe 7 connected to the middle section of the dechlorination section 1;

[0041] a primary water supply valve 8 , which is provided on the primary water supply pipe 7 , and the primary water supply valve 7 is electrically connected to the temperature sensor 6 ;

[0042] and a sewage discharge pipe 9, which is located at the bottom of the pretreatment tower body;

[0043] in,

[0044] The dechlorination section and the desulfurization section are connected in series.

[0045] In one embodiment of the pretreatment tower for the pressure swing adsorption decarbonization device provided by the present invention, the height-to-diameter ratio of the pretreatment tower body is 5-7, and the cross-sectional flow rate of the tower is reasonable, ensuring low resistance through the bed under uniform distribution conditions.

[0046] In one embodiment of the pretreatment tower for a pressure swing adsorption decarbonization system provided by the present invention, the catalyst support plate is a Johnson grid mesh, which offers advantages such as resistance to clogging, high mesh precision, ease of cleaning, minimal pressure drop, long life, low maintenance costs, and high hardness. The V-shaped surface wires create wedge-shaped gaps, effectively preventing clogging and providing high support strength.

[0047] In one embodiment of the pretreatment tower for the pressure swing adsorption decarbonization device provided by the present invention, the air inlet is connected to the blast furnace gas transmission pipe.

[0048] In one embodiment of the pretreatment tower for the pressure swing adsorption decarbonization device provided by the present invention,

[0049] A manual valve is provided upstream and downstream of the primary water supply valve, respectively, and the two manual valves and the primary water supply valve form a regulating pipeline;

[0050] The regulating pipeline is also connected in parallel with a backup bypass, and a backup valve is provided on the backup bypass.

[0051] The temperature sensor detects the reaction temperature of the iron oxide desulfurizer and triggers an alarm when the temperature reaches 50°C. When it reaches 70°C, the primary water supply valve HV0101 is opened. When it is in maintenance mode, the front and rear manual valves are closed and the backup valve of the backup bypass is opened to ensure that the pipeline is in a flow state.

[0052] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with this field, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A pretreatment tower for a pressure swing adsorption decarbonization device, characterized in that: include: The pretreatment tower body includes an air inlet at the top, a dechlorination section at the upper section, a desulfurization section at the lower section, and an air outlet at the bottom; a gas distributor, which is arranged at the gas inlet; two catalyst support plates, which are respectively arranged in the dechlorination section and the desulfurization section; a lower notch air collector, which is arranged at the air outlet; a temperature sensor, which is arranged in the middle section of the desulfurization section; a primary water supply pipe connected to the middle section of the dechlorination section; a primary water supply valve, which is provided on the primary water supply pipe and is electrically connected to the temperature sensor; and a sewage discharge pipe located at the bottom of the pretreatment tower body; in, The dechlorination section and the desulfurization section are connected in series.

2. The pretreatment tower for a pressure swing adsorption decarbonization device according to claim 1, characterized in that: The height-to-diameter ratio of the pretreatment tower body is 5-7.

3. The pretreatment tower for a pressure swing adsorption decarbonization device according to claim 2, characterized in that: The catalyst support plate is supported by a Johnson grid.

4. The pretreatment tower for a pressure swing adsorption decarbonization device according to claim 3, characterized in that: The gas inlet is connected to a blast furnace gas transmission pipe.

5. The pretreatment tower for a pressure swing adsorption decarbonization device according to claim 4, characterized in that: A manual valve is provided upstream and downstream of the primary water supply valve, respectively, and the two manual valves and the primary water supply valve form a regulating pipeline; The regulating pipeline is also connected in parallel with a backup bypass, and a backup valve is provided on the backup bypass.

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