Feed gas dehydrogenation device

Abstract

The utility model relates to the technical field of dehydrogenation, in particular to a feed gas dehydrogenation device which comprises a desulfurization box and a dehydrogenation box, one side of the lower end face of the desulfurization box is provided with a communicated alkaline solution box, the inner wall of the bottom end of the alkaline solution box is provided with an annular pipe, and the upper end of the annular pipe is provided with a gas outlet hole. A rotating shaft is rotatably mounted on the inner wall of the bottom end of the alkaline solution box, stirring rods are mounted on the rotating shaft, a spraying box is mounted on the inner wall of the upper end of the desulfurization box, spraying heads distributed in an array mode are arranged at the lower end of the spraying box, and the dehydrogenation box is mounted on one side of the upper end face of the desulfurization box and communicates with the desulfurization box; a dehydrogenation catalyst is arranged in the dehydrogenation box, and an air box is mounted at the upper end of the dehydrogenation box. The device disclosed by the utility model has the advantages that sulfur in the raw material gas can be firstly removed, then the urea dehydrogenation catalyst is used for dehydrogenation, the urea dehydrogenation catalyst is prevented from being poisoned and inactivated by sulfides in the raw material gas, and the hydrogen content in the raw material gas can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of dehydrogenation, in particular to a raw gas dehydrogenation device. Background Art

[0002] According to investigations, explosions have occurred in almost every part of the urea process in my country's medium-sized nitrogen fertilizer plants, which is a major safety hazard that has existed for a long time in urea production. In order to prevent the occurrence of explosions, it is necessary to reduce the hydrogen content in the raw gas. Urea dehydrogenation catalysts are mainly used during dehydrogenation, but urea dehydrogenation catalysts are easily poisoned and inactivated by sulfides in the raw gas, and cannot effectively reduce the hydrogen content in the carbon dioxide of the raw gas, making the urea plant have a safety risk of explosion. Therefore, the utility model provides a raw gas dehydrogenation device. Utility Model Content

[0003] The purpose of the utility model is to provide a raw gas dehydrogenation device, which has the advantages of first removing sulfur in the raw gas and then using a urea dehydrogenation catalyst for dehydrogenation, preventing the urea dehydrogenation catalyst from being poisoned and deactivated by sulfides in the raw gas, and being able to effectively reduce the hydrogen content in the raw gas, thereby solving the problems raised by the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a raw gas dehydrogenation device, comprising a desulfurization box and a dehydrogenation box, a connected alkaline solution box is installed on one side of the lower end surface of the desulfurization box, an annular tube is arranged on the inner wall of the bottom end of the alkaline solution box, an air outlet is arranged on the upper end of the annular tube, a rotating shaft is rotatably installed on the inner wall of the bottom end of the alkaline solution box, a stirring rod is installed on the rotating shaft, and the stirring rod is located above the annular tube, a spray box is installed on the inner wall of the upper end of the desulfurization box, and an array-distributed spray head is arranged on the lower end of the spray box, the dehydrogenation box is installed on one side of the upper end surface of the desulfurization box, the dehydrogenation box is connected to the desulfurization box, and a dehydrogenation catalyst is arranged in the dehydrogenation box, a bellows is installed on the upper end of the dehydrogenation box, a second driving device is arranged in the bellows, and a fan blade is installed at the end of the main shaft of the second driving device.

[0005] When using the raw gas dehydrogenation device of the utility model,

[0006] An alkaline solution is added into the desulfurization box through the liquid inlet pipe, and the alkaline solution can flow into the alkaline solution box. The raw gas is added into the annular tube through the air inlet pipe, and the raw gas can be discharged from the air outlet to form bubbles. The rotating shaft can be rotated by the operation of the first driving device, and the bubbles can be broken up by the stirring rod to fully contact with the alkaline solution, so as to carry out desulfurization. The fan blades can be rotated at a high speed by the operation of the second driving device, and air can be blown under the high-speed rotation of the fan blades, so that negative pressure can be generated in the wind box, thereby increasing the gas flow rate inside the equipment. The raw gas that has been desulfurized once can rise and enter the desulfurization box. The alkaline solution can be transported to the spray box through the operation of the pump body, and the alkaline solution can be sprayed from the spray head to desulfurize the raw gas again. The desulfurized raw gas can enter the dehydrogenation box, and can be dehydrogenated by the dehydrogenation catalyst, thereby reducing the hydrogen content of the raw gas.

[0007] Preferably, a liquid inlet pipe is provided at the side end of the desulfurization tank, a liquid discharge pipe is provided at the lower end of the alkaline solution tank, and valves are provided on the liquid inlet pipe and the liquid discharge pipe.

[0008] Preferably, an air intake pipe is embedded in the side end of the alkaline solution tank, and the end of the air intake pipe is connected to the annular pipe.

[0009] Preferably, a first driving device is installed at the lower end of the alkaline solution tank, and the main shaft of the first driving device is connected to the axis of the rotating shaft.

[0010] Preferably, a pump body is provided at the rear end of the desulfurization tank, and a second delivery pipe and a first delivery pipe are provided on the pump body, the end of the first delivery pipe is connected to the alkaline solution tank, and the end of the second delivery pipe is connected to the spray tank.

[0011] Preferably, communicating ports distributed in an array are provided between the wind box and the dehydrogenation box, and an air outlet is provided at the upper end of the wind box.

[0012] Preferably, a support leg is installed at the lower end of the desulfurization box, and a total of four support legs are arranged in an array with respect to the desulfurization box.

[0013] Compared with the prior art, the utility model has the following beneficial effects: raw gas is added into the annular tube through the air inlet pipe, the raw gas can be discharged from the air outlet to form bubbles, the bubbles can be broken up by the stirring rod to fully contact with the alkaline solution, and desulfurization can be carried out, the raw gas desulfurized once can rise into the desulfurization box, the alkaline solution can be transported to the spray box through the operation of the pump body, the alkaline solution can be sprayed from the spray head to desulfurize the raw gas again, the desulfurized raw gas can enter the dehydrogenation box and be dehydrogenated by the dehydrogenation catalyst, by first removing the sulfur in the raw gas and then using the urea dehydrogenation catalyst for dehydrogenation, the urea dehydrogenation catalyst is prevented from being poisoned and inactivated by the sulfide in the raw gas, the hydrogen content in the raw gas can be effectively reduced, and explosions in urea production can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a rear view structural schematic diagram of the utility model;

[0016] Figure 3 It is a schematic diagram of the cross-sectional bottom view of the structure of the utility model;

[0017] Figure 4 It is a cross-sectional structural schematic diagram of the utility model;

[0018] Figure 5 It is a partial structural schematic diagram of the utility model.

[0019] The reference numerals and names in the figures are as follows:

[0020] 101. Desulfurization box; 102. Support legs; 103. Second delivery pipe; 104. First delivery pipe; 105. Pump body; 106. Spray box; 107. Spray head; 201. Alkaline solution box; 202. Air inlet pipe; 203. Discharge pipe; 204. First drive device; 205. Rotating shaft; 206. Stirring rod; 207. Annular pipe; 208. Air outlet; 301. Dehydrogenation box; 302. Bellows; 303. Dehydrogenation catalyst; 304. Second drive device; 305. Fan blades. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example

[0023] See also Figures 1 to 5 The utility model provides an embodiment: a raw gas dehydrogenation device, comprising:

[0024] The desulfurization box 101 and the dehydrogenation box 301 are provided with a connected alkaline solution box 201 on one side of the lower end surface of the desulfurization box 101. The inner wall of the bottom end of the alkaline solution box 201 is provided with an annular tube 207. The upper end of the annular tube 207 is provided with an air outlet 208. The inner wall of the bottom end of the alkaline solution box 201 is rotatably provided with a rotating shaft 205. The rotating shaft 205 is provided with a stirring rod 206. The stirring rod 206 is located above the annular tube 207. The inner wall of the upper end of the desulfurization box 101 is provided with a rotating shaft 205. A spray box 106 is installed, and an array-distributed spray head 107 is arranged at the lower end of the spray box 106. The dehydrogenation box 301 is installed on one side of the upper end surface of the desulfurization box 101. The dehydrogenation box 301 is connected to the desulfurization box 101, and a dehydrogenation catalyst 303 is arranged in the dehydrogenation box 301. A wind box 302 is installed at the upper end of the dehydrogenation box 301, and a second driving device 304 is arranged in the wind box 302. The main shaft end of the second driving device 304 is installed with a fan blade 305.

[0025] In this embodiment, an alkaline solution is added to the desulfurization box 101 through the liquid inlet pipe, and the alkaline solution can flow into the alkaline solution box 201. The raw gas is added to the annular tube 207 through the air inlet pipe 202, and the raw gas can be discharged from the air outlet 208 to form bubbles. The first driving device 204 can be used to rotate the rotating shaft 205, and the bubbles can be broken up by the stirring rod 206 to fully contact with the alkaline solution, so that desulfurization can be performed. The second driving device 304 is used to make the fan blade 305 rotate at a high speed, and the fan The blades 305 can blow air when rotating at a high speed, which can generate negative pressure in the wind box 302 and increase the gas flow rate inside the equipment. The raw gas that has been desulfurized once can rise and enter the desulfurization box 101. The alkaline solution can be transported to the spray box 106 through the operation of the pump body 105. The alkaline solution can be sprayed from the spray head 107 to desulfurize the raw gas again. The desulfurized raw gas can enter the dehydrogenation box 301 and can be dehydrogenated by the dehydrogenation catalyst 303, thereby reducing the hydrogen content of the raw gas.

[0026] Furthermore,

[0027] The side end of the desulfurization box 101 is provided with a liquid inlet pipe, and the lower end of the alkaline solution box 201 is provided with a liquid discharge pipe 203, and valves are provided on the liquid inlet pipe and the liquid discharge pipe 203. Alkaline solution is added into the desulfurization box 101 through the liquid inlet pipe, and the alkaline solution can flow into the alkaline solution box 201. When the alkaline solution is used for a long time, the alkaline solution in the alkaline solution box 201 can be discharged through the liquid discharge pipe 203.

[0028] Furthermore,

[0029] An air inlet pipe 202 is embedded in the side end of the alkaline solution tank 201, and the end of the air inlet pipe 202 is connected to the annular pipe 207. The raw material gas is added into the annular pipe 207 through the air inlet pipe 202.

[0030] Furthermore,

[0031] A first driving device 204 is installed at the lower end of the alkaline solution tank 201, and the main shaft of the first driving device 204 is connected to the axis of the rotating shaft 205. The rotating shaft 205 can be rotated by the operation of the first driving device 204.

[0032] Furthermore,

[0033] The rear end of the desulfurization tank 101 is provided with a pump body 105, on which a second delivery pipe 103 and a first delivery pipe 104 are provided, the end of the first delivery pipe 104 is connected to the alkaline solution tank 201, and the end of the second delivery pipe 103 is connected to the spray tank 106. The alkaline solution can be delivered to the spray tank 106 through the operation of the pump body 105.

[0034] Furthermore,

[0035] Communication ports distributed in an array are provided between the wind box 302 and the dehydrogenation box 301 , and an air outlet is provided at the upper end of the wind box 302 .

[0036] Furthermore,

[0037] A support leg 102 is installed at the lower end of the desulfurization box 101. There are four support legs 102 distributed in an array with respect to the desulfurization box 101. The support legs 102 are used to support the desulfurization box 101.

[0038] The pump body 105, the first drive device 204 and the second drive device 304 in the present invention are well-known devices, and their working principles and circuit connections are well known to technicians in the field. They are all conventional means or common knowledge and will not be elaborated here. Those skilled in the art can make any selections according to their needs or convenience.

[0039] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A raw gas dehydrogenation device, comprising a desulfurization box (101) and a dehydrogenation box (301), characterized in that: A connected alkaline solution tank (201) is installed on one side of the lower end surface of the desulfurization tank (101), an annular tube (207) is provided on the inner wall of the bottom end of the alkaline solution tank (201), an air outlet (208) is provided on the upper end of the annular tube (207), a rotating shaft (205) is rotatably installed on the inner wall of the bottom end of the alkaline solution tank (201), a stirring rod (206) is installed on the rotating shaft (205), and the stirring rod (206) is located above the annular tube (207), and a spray box (107) is installed on the inner wall of the upper end of the desulfurization tank (101). 6), the lower end of the spray box (106) is provided with an array-distributed spray head (107), the dehydrogenation box (301) is installed on one side of the upper end surface of the desulfurization box (101), the dehydrogenation box (301) is connected to the desulfurization box (101), and a dehydrogenation catalyst (303) is arranged in the dehydrogenation box (301), the upper end of the dehydrogenation box (301) is provided with a wind box (302), the wind box (302) is provided with a second driving device (304), and a fan blade (305) is installed at the end of the main shaft of the second driving device (304).

2. A raw gas dehydrogenation device according to claim 1, characterized in that: A liquid inlet pipe is provided at the side end of the desulfurization box (101), and a liquid discharge pipe (203) is provided at the lower end of the alkaline solution box (201). Valves are provided on the liquid inlet pipe and the liquid discharge pipe (203).

3. A raw gas dehydrogenation device according to claim 1, characterized in that: An air intake pipe (202) is embedded in the side end of the alkaline solution tank (201), and the end of the air intake pipe (202) is connected to the annular pipe (207).

4. A raw gas dehydrogenation device according to claim 1, characterized in that: A first driving device (204) is installed at the lower end of the alkaline solution tank (201), and the main shaft of the first driving device (204) is connected to the axis of the rotating shaft (205).

5. A raw gas dehydrogenation device according to claim 1, characterized in that: A pump body (105) is provided at the rear end of the desulfurization box (101), and a second delivery pipe (103) and a first delivery pipe (104) are provided on the pump body (105). The end of the first delivery pipe (104) is connected to the alkaline solution box (201), and the end of the second delivery pipe (103) is connected to the spray box (106).

6. A raw gas dehydrogenation device according to claim 1, characterized in that: Communication ports distributed in an array are provided between the wind box (302) and the dehydrogenation box (301), and an air outlet is provided at the upper end of the wind box (302).

7. A raw gas dehydrogenation device according to claim 1, characterized in that: A support leg (102) is installed at the lower end of the desulfurization box (101), and there are four support legs (102) distributed in an array with respect to the desulfurization box (101).

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