Desulfurization regeneration tower

Abstract

The desulfurization regeneration tower comprises a tower body, and the bottom of the tower body is provided with a premixing nozzle used for mixing compressed air and rich liquor; the pre-mixing nozzle is vertically arranged at the bottom of the tower body, the pre-mixing nozzle is provided with a pre-mixing cavity which is vertically arranged, the pre-mixing cavity extends upwards to the upper end face of the pre-mixing nozzle so as to form an upward spraying opening, the pre-mixing nozzle is further provided with a compressed air inlet and a rich liquid inlet, and the compressed air inlet is communicated with the rich liquid inlet. And the compressed air inlet and the rich liquid inlet are both communicated with the premixing cavity.

Description

TECHNICAL FIELD

[0001] The utility model relates to a desulfurization regenerator. BACKGROUND

[0002] In the coking process, about 30%-35% of sulfur in coal is converted into hydrogen sulfide and other sulfides, and the rest of the sulfur enters the coke. Hydrogen sulfide, together with ammonia and hydrogen cyanide, forms impurities in the coal gas. Their presence not only seriously endangers people's health and corrodes equipment, but also pollutes the environment; if used as synthesis gas, it will also cause poisoning of the catalyst; at the same time, various industrial furnaces and flame cutters have certain requirements for the sulfur content in the coke oven gas, so the coke oven gas must be desulfurized and decyanated before use. Whether the coke oven gas is used as fuel or as a production raw material, it needs to be purified before use to remove H2S in the gas to meet environmental protection and production requirements.

[0003] The most widely used method for industrial coke oven gas desulfurization and decyanation at present is the wet oxidation method. Most domestic coking plants generally use HPF desulfurization and decyanation process. HPF method is a domestic self-developed desulfurization process. Because this method has the characteristics of simple equipment, stable operation, high desulfurization efficiency, short process, low one-time investment and low running cost, it has been widely applied in many coking enterprises. Most domestic manufacturers use a three-stage desulfurization process. The hydrogen sulfide index after the first-stage desulfurization tower is about 800 mg / Nm³, the hydrogen sulfide index after the second-stage desulfurization tower is below 50 mg / Nm³, and the hydrogen sulfide index after the third-stage desulfurization tower is below 20 mg / Nm³.

[0004] The desulfurization liquid can be reused after regeneration in the regenerator. The rich liquid at the bottom of the first-stage desulfurization tower is sent to the regenerator, and is regenerated by contacting and oxidizing under the catalytic action of the catalyst HPF. The existing desulfurization regenerator requires a large amount of regeneration air. SUMMARY

[0005] In order to overcome the above-mentioned shortcomings of the existing desulfurization regenerator, the utility model provides a desulfurization regenerator with a small amount of regeneration air.

[0006] The technical scheme for solving the technical problems of the utility model is: a desulfurization regenerator, comprising a tower body, a premixing nozzle for mixing compressed air and rich liquid is arranged at the bottom of the tower body;

[0007] The premixing nozzle is vertically arranged at the bottom of the tower body. The premixing nozzle has a premixing cavity arranged vertically. The premixing cavity extends upward to the upper end face of the premixing nozzle to form an upwardly directed spray outlet. The premixing nozzle is further provided with a compressed air inlet and a rich liquid inlet. The compressed air inlet and the rich liquid inlet are in communication with the premixing cavity.

[0008] Furthermore, the compressed air inlet and the rich liquid inlet are not on a straight line.

[0009] Furthermore, the premixing chamber extends downward to the lower end face of the premixing nozzle to form a rich liquid inlet.

[0010] Furthermore, the premix nozzle is provided with an inclined channel that is inclined from top to bottom outward and communicates with the premix chamber. The inclined channel is also provided with a transversely arranged air intake channel that communicates with it, and the end of the air intake channel forms the compressed air inlet.

[0011] Furthermore, a steam inlet is formed at the end of the inclined channel.

[0012] Furthermore, the premixed nozzle is provided with a support frame, and the inclined channel is supported on the support frame.

[0013] Furthermore, the support frame includes a support rod disposed on the premix nozzle, and a support sleeve is provided at the end of the support rod, with the inclined channel supported in the support sleeve.

[0014] Furthermore, the premixed nozzle consists of an upper section, a middle section, and a lower section from top to bottom. The diameter of the lower section is larger than that of the upper section. The upper section and the lower section are connected by the middle section, and the sidewall of the middle section is an inclined surface.

[0015] Furthermore, the inclined channel is connected to the premixing chamber at the middle section.

[0016] The beneficial effects of this utility model are as follows: a premixed nozzle is set in the regeneration tower, and the rich liquid and compressed air are premixed and sprayed out using a high-efficiency premixed nozzle. The amount of regeneration air used is only 45% of that of the traditional regeneration tower. At the same time, the oxygen content in the regeneration air is controlled below 15% (Vol), which can be directly returned to the coal gas, and the working environment is friendly. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the premix nozzle. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Reference Figure 1 , Figure 2 A desulfurization regeneration tower includes a tower body 1, the bottom of which is provided with a premixing nozzle 2 for mixing compressed air and rich liquid.

[0021] The premixing nozzle 2 is vertically arranged at the bottom of the tower body 1, the premixing nozzle 2 has a premixing cavity arranged vertically, the premixing cavity extends upwards to the upper end face of the premixing nozzle to form an upwardly directed spray outlet 3, the premixing nozzle 2 is further provided with a compressed air inlet 4 and a rich liquid inlet 5, the compressed air inlet 4 and the rich liquid inlet 5 are both in communication with the premixing cavity. In an embodiment, the premixing cavity extends downwards to the lower end face of the premixing nozzle 2 to form the rich liquid inlet 5, which is more convenient for the rich liquid from the bottom of the previous stage desulfurization tower to enter the premixing nozzle. Of course, the rich liquid inlet 5 can also be separately arranged on the side wall of the premixing nozzle 2.

[0022] The utility model discloses a premixing nozzle 2 is arranged in the regenerating tower, and the rich liquid and compressed air are premixed and sprayed out by the premixing nozzle 2, and the air consumption of regeneration is only 45% of the traditional regenerating tower, simultaneously, the oxygen content in the air of regeneration is controlled below 15% (Vol), can directly back to the allocation in the coal gas, and the operation environment is friendly.

[0023] In an embodiment, the compressed air inlet 4 and the rich liquid inlet 5 are not on a straight line, so that the compressed air entering from the compressed air inlet 4 can better mix with the rich liquid entering from the rich liquid inlet 5.

[0024] In an embodiment, the compressed air inlet 4 is specifically arranged as follows: the premixing nozzle 2 is provided with an inclined channel 6 inclined from top to bottom and outwardly in communication with the premixing cavity, the inclined channel 6 is further provided with an air inlet channel 7 arranged transversely and in communication therewith, and the end of the air inlet channel 7 forms the compressed air inlet 4, which can form a better mixing effect of compressed air and rich liquid.

[0025] In an embodiment, the premixing nozzle 2 is provided with a support frame, and the inclined channel 6 is supported on the support frame to make the inclined channel 6 more stable. The support frame can have the following specific structure: the support frame includes a support rod 8 arranged on the premixing nozzle 2, and the end of the support rod 8 is provided with a support sleeve 9, and the inclined channel 6 is supported in the support sleeve 9.

[0026] In an embodiment, the end of the inclined channel 6 forms a steam inlet 10, which can be used to pass steam into the inclined channel to dredge when the pipeline is blocked.

[0027] In one embodiment, the premixing nozzle 2 is composed of an upper section 2-1, a middle section 2-2 and a lower section 2-3 from top to bottom, the diameter of the lower section 2-3 is greater than that of the upper section 2-1, the upper section 2-1 and the lower section 2-3 are connected through the middle section 2-2, the side wall of the middle section 2-2 is inclined, the inclined channel is communicated with the premixing cavity at the middle section 2-2, and the better mixing of compressed air and rich liquid can be realized through the variable-diameter structure.

[0028] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example" or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0029] The embodiments of the present application have been described above. However, the present application is not limited to the above-described embodiments. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A desulfurization regenerator column comprising a column shell, characterized by: The bottom of the tower body is provided with a premixing nozzle for mixing compressed air and rich liquid; The premixing nozzle is vertically arranged at the bottom of the tower body, the premixing nozzle has a premixing cavity arranged vertically, the premixing cavity extends upward to the upper end surface of the premixing nozzle to form an upward spraying outlet, the premixing nozzle is further provided with a compressed air inlet and a rich liquid inlet, the compressed air inlet and the rich liquid inlet are communicated with the premixing cavity.

2. The desulfurization regenerator column of claim 1, wherein: The compressed air inlet and the rich liquid inlet are not in a straight line.

3. The desulfurization regenerator tower of claim 2, wherein: The premixing cavity extends downward to the lower end surface of the premixing nozzle to form a rich liquid inlet.

4. The desulfurization regenerator tower of claim 3 wherein: The premixing nozzle is provided with an inclined channel inclined from top to bottom and communicated with the premixing cavity, the inclined channel is further provided with an air inlet channel arranged transversely and communicated with the inclined channel, and the end of the air inlet channel forms the compressed air inlet.

5. The desulfurization regenerator tower of claim 4 wherein: The end of the inclined channel forms a steam inlet.

6. The desulfurization regenerator tower of claim 4 wherein: The premixing nozzle is provided with a support frame, and the inclined channel is supported on the support frame.

7. The desulfurization regenerator tower of claim 6, wherein: The support frame includes a support rod arranged on the premixing nozzle, and the end of the support rod is provided with a support sleeve, and the inclined channel is supported in the support sleeve.

8. The desulfurization regenerator column according to any one of claims 4 to 7, characterized in that: The premixing nozzle has an upper segment, a middle segment and a lower segment from top to bottom, the diameter of the lower segment is greater than that of the upper segment, the upper segment and the lower segment are connected through the middle segment, and the side wall of the middle segment is inclined.

9. The desulfurization regenerator tower of claim 8, wherein: The inclined channel is communicated with the premixing cavity at the middle segment.

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