阅读说明：本技术 一种脱硫再生塔或再生槽顶部硫泡沫提出装置及工艺 (Device and process for extracting sulfur foam on top of desulfurization regeneration tower or regeneration tank ) 是由 樊晓光 梁光一 张�杰 范文松 于 2020-07-02 设计创作，主要内容包括：一种脱硫再生塔或再生槽顶部硫泡沫提出装置及工艺,所述脱硫再生塔或再生槽顶部结构包括外壳、塔体,外壳与塔体之间的夹层空间形成外环形通道,套层结构的内筒上设有硫泡沫出口,内筒内部设有硫泡沫溢流堰,硫泡沫溢流堰的底端密封固定在硫泡沫出口的下方,硫泡沫溢流堰与内筒之间形成内环形通道,硫泡沫出口连接硫泡沫泵,硫泡沫泵的出口分为两路,一路送出硫泡沫,另一路通过回流管道连通内环形通道；在内筒上、硫泡沫溢流堰的下方设有脱硫液出口,脱硫液出口连通外环形通道。本发明根据煤气实际脱硫产生的硫磺量、通过本装置脱硫液与硫泡沫进行分离,得到稳定连续的特定浓度的硫泡沫液体,同时避免了硫泡沫系统堵塞发生。(A sulfur foam extraction device and a process at the top of a desulfurization regeneration tower or a regeneration tank are provided, wherein the top structure of the desulfurization regeneration tower or the regeneration tank comprises a shell and a tower body, an interlayer space between the shell and the tower body forms an outer annular channel, a sulfur foam outlet is arranged on an inner cylinder of a jacket structure, a sulfur foam overflow weir is arranged inside the inner cylinder, the bottom end of the sulfur foam overflow weir is fixed below the sulfur foam outlet in a sealing manner, an inner annular channel is formed between the sulfur foam overflow weir and the inner cylinder, the sulfur foam outlet is connected with a sulfur foam pump, the outlet of the sulfur foam pump is divided into two paths, one path of the two paths of the sulfur foam pump sends out sulfur foam; a desulfurization liquid outlet is arranged on the inner cylinder and below the sulfur foam overflow weir, and the desulfurization liquid outlet is communicated with the outer annular channel. According to the invention, the desulfurization liquid and the sulfur foam are separated through the device according to the amount of sulfur generated by actual desulfurization of coal gas, so that stable and continuous sulfur foam liquid with specific concentration is obtained, and meanwhile, the occurrence of sulfur foam system blockage is avoided.)

1. A sulfur foam extracting device at the top of a desulfurization regeneration tower or a regeneration tank comprises a shell and a tower body, wherein the shell and the tower body form a jacket structure, and an interlayer space between the shell and the tower body forms an outer annular channel; a desulfurization liquid outlet is arranged on the tower body and below the sulfur foam overflow weir, the desulfurization liquid outlet is communicated with the outer annular channel, and a desulfurization liquid outlet is arranged at the bottom of the outer annular channel.

2. The sulfur foam extracting device at the top of the desulfurization regeneration tower or the regeneration tank as recited in claim 1, wherein said desulfurization solution outlet is connected with a desulfurization solution overflow pipe, said desulfurization solution overflow pipe is disposed in the outer annular channel, and the outlet of the desulfurization solution overflow pipe is not lower than the upper surface of the sulfur foam overflow weir.

3. The sulfur foam extraction device at the top of the desulfurization regeneration tower or the regeneration tank of claim 1, wherein a flow controller is arranged on a sulfur foam delivery pipeline of the sulfur foam pump.

4. A sulfur foam extracting process using the sulfur foam extracting apparatus at the top of the desulfurization regeneration tower or the regeneration tank according to any one of claims 1 to 3, comprising:

1) the regenerated desulfurization liquid from the desulfurization regeneration tower or the lower surface of the top of the regeneration tank overflows from a desulfurization liquid overflow pipe, enters the outer annular channel and is discharged from a desulfurization liquid outlet at the lower part of the outer annular channel;

2) sulfur foam of the regenerated desulfurization solution from the lower part of the top of the desulfurization regeneration tower or the regeneration tank flows upwards together with the regeneration air, the sulfur foam overflows from a sulfur foam overflow weir and flows into an inner annular channel, and the sulfur foam in the inner annular channel is pumped out from a sulfur foam outlet and enters a sulfur foam pump;

3) one part of the sulfur foam from the sulfur foam pump is sent out by controlling the produced amount through a flow controller to obtain sulfur foam liquid with specific sulfur content, and the other part of the sulfur foam is sent back to the inner annular channel for circulation through a return pipeline, so that the sulfur foam liquid in the inner annular channel continuously and stably flows, and the blockage caused by the deposition of sulfur in the sulfur foam liquid is prevented.

Technical Field

The invention relates to the field of wet oxidation desulphurization of coke oven gas, in particular to a device and a process for extracting sulfur foam on the top of a desulphurization regeneration tower or a regeneration tank.

Background

The wet oxidation desulfurization process method is widely applied to the coke oven gas purification process with the advantages of high desulfurization and dehydrogenation efficiency, simple process, simple operation and the like, and the two process methods of desulfurization regeneration and height division tower compressed air regeneration and jet self-absorption air regeneration are adopted, and no matter which regeneration process method is adopted, the method for extracting sulfur foam is to extract sulfur foam liquid (the concentration is usually 40 g-120 g/l) by adjusting the liquid level of desulfurization liquid and the height difference of the liquid level of sulfur foam through a floating cylinder type liquid level meter at the upper part of a regeneration tower or a regeneration tank, but the concentration of the extracted sulfur foam is related to the sulfur amount, the foam state, the defoaming effect and the like besides the liquid level of the desulfurization liquid and the height difference of the liquid level of the sulfur foam, so that the sulfur concentration is difficult to accurately control by adjusting the liquid level difference of the desulfurization liquid and the liquid level of the sulfur foam through the floating cylinder type liquid level meter, the extracted sulfur foam flows to a foam tank by self-flowing and often causes system blockage, the prior sulfur foam is mainly used for melting sulfur or performing filter pressing to obtain crude sulfur, the concentration change of the sulfur foam has no substantial influence on the subsequent operation, but along with the increasing strictness of the environmental protection requirement, the sulfur in the sulfur foam and the secondary salt in the liquid are in a great trend to be incinerated together to prepare acid, so the sulfur foam proposed by a regeneration tower or the regeneration tank is required to contain the sulfur content in a stable specific proportion to meet the requirement of a sulfur pulp acid preparation system configured subsequently.

Disclosure of Invention

The invention aims to provide a device and a process for extracting sulfur foam on the top of a desulfurization regeneration tower or a regeneration tank, which are used for obtaining stable sulfur foam liquid containing sulfur with specific concentration (10 g-150 g/l) by controlling the sulfur foam output amount by a specific method (equipment structure) according to the sulfur amount generated by a coal gas desulfurization system so as to meet the requirement of preparing acid by burning subsequent sulfur slurry and realize the purpose of obtaining the stable sulfur foam liquid with set sulfur concentration by real-time automatic control.

In order to achieve the purpose, the invention adopts the following technical scheme:

a sulfur foam extracting device at the top of a desulfurization regeneration tower or a regeneration tank comprises a shell and a tower body, wherein the shell and the tower body form a jacket structure, an interlayer space between the shell and the tower body forms an outer annular channel, a sulfur foam outlet is formed in the tower body, a sulfur foam overflow weir is arranged inside the tower body, the bottom end of the sulfur foam overflow weir is fixed below the sulfur foam outlet in a sealing manner, the upper end of the sulfur foam overflow weir is higher than the sulfur foam outlet, an inner annular channel is formed between the sulfur foam overflow weir and the tower body, the sulfur foam outlet is connected with a sulfur foam pump through a pipeline, the outlet of the sulfur foam pump is divided into two paths, one path of the sulfur foam is sent out, and the other path of the sulfur foam pump is communicated with the inner annular channel through a backflow pipeline; a desulfurization liquid outlet is arranged on the tower body and below the sulfur foam overflow weir, the desulfurization liquid outlet is communicated with the outer annular channel, and a desulfurization liquid outlet is arranged at the bottom of the outer annular channel.

The outlet of the desulfurization liquid is connected with a desulfurization liquid overflow pipe, the desulfurization liquid overflow pipe is arranged in the outer annular channel, and the outlet of the desulfurization liquid overflow pipe is not lower than the upper surface of the sulfur foam overflow weir.

And a flow controller is arranged on a pipeline for delivering sulfur foam outside the sulfur foam pump.

A sulfur foam extraction process of a sulfur foam extraction device at the top of a desulfurization regeneration tower or a regeneration tank specifically comprises the following steps:

1) the regenerated desulfurization liquid from the desulfurization regeneration tower or the lower surface of the top of the regeneration tank overflows from a desulfurization liquid overflow pipe, enters the outer annular channel and is discharged from a desulfurization liquid outlet at the lower part of the outer annular channel;

2) sulfur foam of the regenerated desulfurization solution from the lower part of the top of the desulfurization regeneration tower or the regeneration tank flows upwards together with the regeneration air, the sulfur foam overflows from a sulfur foam overflow weir and flows into an inner annular channel, and the sulfur foam in the inner annular channel is pumped out from a sulfur foam outlet and enters a sulfur foam pump;

3) one part of the sulfur foam from the sulfur foam pump is sent out by controlling the produced amount through a flow controller to obtain sulfur foam liquid with specific sulfur content, and the other part of the sulfur foam is sent back to the inner annular channel for circulation through a return pipeline, so that the sulfur foam liquid in the inner annular channel continuously and stably flows, and the blockage caused by the deposition of sulfur in the sulfur foam liquid is prevented.

Compared with the prior art, the invention has the beneficial effects that:

according to the invention, the desulfurization liquid and the sulfur foam are separated through the device according to the amount of sulfur generated by actual desulfurization of coal gas, so that stable and continuous sulfur foam liquid with specific concentration is obtained, and meanwhile, the occurrence of sulfur foam system blockage is avoided.

Drawings

FIG. 1 is a schematic structural view of a sulfur foam stripping device at the top of a desulfurization regeneration tower or a regeneration tank according to the present invention.

Fig. 2 is a view from a-a of fig. 1.

In the figure: 1-top of regeneration tower or regeneration tank, 1-1 sulfur foam outlet, 1-2 reflux pipeline, 1-3 sulfur foam overflow weir, 1-4 desulfurization liquid overflow pipe, 1-5 desulfurization liquid outlet, 1-6 desulfurization liquid outlet, 2-sulfur foam pump, 3-flow controller, 4-outer annular channel, 5-inner annular channel, 6-sulfur foam, 7-tower body, 8-desulfurization liquid, 9-outer sulfur foam, 10-circulating reflux desulfurization liquid, and 11-shell.

Detailed Description

Embodiments of the invention are further described below with reference to the accompanying drawings:

as shown in fig. 1-2, a sulfur foam extracting device at the top of a desulfurization regeneration tower or regeneration tank, wherein a structure of the top 1 of the desulfurization regeneration tower or regeneration tank comprises a shell 11 and a tower body 7, the shell 11 and the tower body 7 form a jacket structure, an interlayer space between the shell 11 and the tower body 7 forms an outer annular channel 4, the tower body 7 is provided with a sulfur foam outlet 1-1, a sulfur foam overflow weir 1-3 is arranged inside the tower body 7, the bottom end of the sulfur foam overflow weir 1-3 is hermetically fixed below the sulfur foam outlet 1-1, the upper end of the sulfur foam overflow weir 1-3 is higher than the sulfur foam outlet 1-1, an inner annular channel 5 is formed between the sulfur foam overflow weir 1-3 and the tower body 7, the sulfur foam outlet 1-1 is connected with a sulfur foam pump 2 through a pipeline, the outlet of the sulfur foam pump 2 is divided into two paths, one path is sent out sulfur foam, and the other path is communicated with an inner annular channel 5 through a return pipeline 1-2; a desulfurization liquid outlet 1-6 is arranged on the tower body 7 and below the sulfur foam overflow weir 1-3, the desulfurization liquid outlet 1-6 is communicated with an outer annular channel 4, and a desulfurization liquid outlet 1-5 is arranged at the bottom of the outer annular channel 4.

The desulfurization liquid outlet 1-6 is connected with a desulfurization liquid overflow pipe 1-4, the desulfurization liquid overflow pipe 1-4 is arranged in the outer annular channel 4, and the outlet of the desulfurization liquid overflow pipe 1-4 is not lower than the upper surface of the sulfur foam overflow weir 1-3. A plurality of doctor solution outlets 1-6 and doctor solution overflow pipes 1-4 are uniformly distributed on the circumference direction of the tower body 7.

The height difference between the desulfurization solution overflow pipe 1-4 and the sulfur foam overflow weir 1-3 is 0-300mm, and the preferred height difference H is 100 mm.

The top of the tower body 7 is open, and the top of the shell 11 is provided with a tail gas discharge outlet.

And a flow controller 3 is arranged on a pipeline of the sulfur foam 9 sent out by the sulfur foam pump 2.

The invention separates the desulfurization solution 8 and the sulfur foam 6 through the inner and outer annular channels of the top 1 of the regeneration tower or the regeneration tank respectively, thereby ensuring that the desulfurization solution 8 is continuously separated to the outer annular channel 4 and sent out, and the sulfur foam 6 is also simultaneously separated to the inner annular channel 5 and continuously pumped out.

The invention only provides the structure and the process method of the novel separation and extraction device of the desulfurization solution and the sulfur foam at the top of the regeneration tower or the regeneration tank, and the other parts of the regeneration tower or the regeneration tank are the prior art.

A sulfur foam extraction process of a sulfur foam extraction device at the top of a desulfurization regeneration tower or a regeneration tank specifically comprises the following steps:

1) the regenerated desulfurization liquid 8 from the lower part of the top 1 of the desulfurization regeneration tower or the regeneration groove overflows from a desulfurization liquid overflow pipe 1-4 into the outer annular channel 4, and is discharged from a desulfurization liquid discharge port 1-5 at the lower part of the outer annular channel 4 and sent back to a desulfurization system.

2) The sulfur foam 6 of the regenerated desulfurization solution from the lower part of the top 1 of the desulfurization regeneration tower or the regeneration tank moves upwards together with the regenerated air, the sulfur foam 6 overflows from the sulfur foam overflow weir 1-3 and flows into the inner annular channel 5, and the sulfur foam 6 in the inner annular channel 5 is pumped out from the sulfur foam outlet 1-1 and enters the sulfur foam pump 2;

3) one part of the sulfur foam from the sulfur foam pump 2 is sent out by controlling the produced amount through the flow controller 3 to obtain sulfur foam liquid with specific sulfur content, and the other part of the sulfur foam is sent back to the inner annular channel 5 for circulation through the return pipeline 1-2, so that the sulfur foam 6 liquid in the inner annular channel 5 continuously and stably flows, and the blockage caused by the deposition of sulfur in the sulfur foam 6 liquid is prevented;

the amount of the sulfur foam liquid extracted from the top of the regeneration tank or the regeneration tower is controlled according to the generated amount of the desulfurization liquid regenerated sulfur so as to control the concentration of the sulfur contained in the sulfur foam liquid, the sulfur foam concentration is increased when the amount of the extracted sulfur foam liquid is reduced, and the sulfur foam concentration is reduced when the amount of the extracted sulfur foam liquid is increased.

4) The regenerated tail gas is discharged from an upper outlet.

The content of the sulfur in the sulfur foam liquid sent out in the step 3) is controlled within the range of 10g to 150g/l, and the preferable control amount of the sulfur is 50 g/l. The sulphur particles in the sulphur foam liquid are in the order of a few to tens of microns.

Although the embodiments of the present invention have been described with reference to the accompanying drawings, the scope of the present invention is not limited thereto, and various modifications and variations which do not require inventive efforts and which are made by those skilled in the art are within the scope of the present invention.