阅读说明：本技术 用于高炉煤气脱除有机硫或无机硫的管道喷淋系统及方法 (Pipeline spraying system and method for removing organic sulfur or inorganic sulfur from blast furnace gas ) 是由 石笑竹 董俊岭 于 2020-11-27 设计创作，主要内容包括：本发明提供一种用于高炉煤气脱除有机硫或无机硫的管道喷淋系统及方法,属于高炉煤气脱硫领域,以解决目前高炉煤气脱硫方式存在运行阻力大、占地面积大、投资成本高及会产生固体污染物的问题。包括氮气装置、加药装置、冲洗装置、废水装置、喷淋装置、管道装置和除雾装置,其中：所述氮气装置的出口与喷淋装置的气体进口连接,加药装置的出口与喷淋装置的液体进口连接,喷淋装置的出口安装在管道装置中,管道装置的进口与高炉煤气管道连接,管道装置的出口与除雾装置的进口连接,冲洗装置的出口与除雾装置连接,废水装置的进口与除雾装置底部的液体出口连接,除雾装置的气体出口与各高炉煤气用户端的管道连接。(The invention provides a pipeline spraying system and a method for removing organic sulfur or inorganic sulfur from blast furnace gas, belongs to the field of blast furnace gas desulfurization, and aims to solve the problems of large operation resistance, large occupied area, high investment cost and generation of solid pollutants in the conventional blast furnace gas desulfurization mode. Including nitrogen gas device, charge device, washing unit, effluent plant, spray set, pipe device and defogging device, wherein: the outlet of the nitrogen device is connected with the gas inlet of the spraying device, the outlet of the dosing device is connected with the liquid inlet of the spraying device, the outlet of the spraying device is installed in the pipeline device, the inlet of the pipeline device is connected with a blast furnace gas pipeline, the outlet of the pipeline device is connected with the inlet of the demisting device, the outlet of the flushing device is connected with the demisting device, the inlet of the wastewater device is connected with the liquid outlet at the bottom of the demisting device, and the gas outlet of the demisting device is connected with the pipeline of each blast furnace gas user side.)

1. The utility model provides a pipeline spraying system for blast furnace gas desorption organic sulphur or inorganic sulphur which characterized in that, includes nitrogen gas device (1), charge device (2), washing unit (3), waste water installation (4), spray set (5), pipe device (6) and defogging device (7), wherein:

the export of nitrogen gas device (1) and the gas access connection of spray set (5), the export of charge device (2) and the liquid access connection of spray set (5), the export of spray set (5) is installed in pipe means (6), the import and the blast furnace gas pipe connection of pipe means (6), the export and the access connection of defogging device (7) of pipe means (6), the export and the defogging device (7) of washing unit (3) are connected, the import and the liquid exit linkage of defogging device (7) bottom of waste water installation (4), the gas outlet and the pipe connection of each blast furnace gas user side of defogging device (7).

2. A pipeline spraying method for removing organic sulfur or inorganic sulfur from blast furnace gas, which adopts the pipeline spraying system for removing organic sulfur or inorganic sulfur from blast furnace gas of claim 1, and is characterized by comprising the following steps:

s1, the ratio of the desulfurizing agent to the nitrogen gas is 0.2-0.3m³: 1L of the mixture is fully mixed and then enters a spraying device (5) to atomize the desulfurization agent;

s2, allowing the blast furnace gas to enter a pipeline device (6) at a flow speed of 9-12m/S, carrying out contact reaction with the atomized desulfurization agent in the pipeline device (6), and removing organic sulfur or inorganic sulfur in the blast furnace gas after the contact reaction;

s3, enabling the desulfurized blast furnace gas to enter a demisting device (7) and separating liquid drops carried in the gas flow out through a bent channel in the demisting device (7) under the action of inertia force and gravity, wherein the washing device (3) washes the demisting device (7) regularly and quantitatively in the running process of the demisting device (7);

s4, allowing the liquid drops separated by the defogging device (7) and the washed wastewater to flow into the wastewater device (4), and conveying the clean gas separated by the defogging device (7) into gas pipelines at each user end.

3. The pipe spraying method according to claim 2, wherein the washing device (3) washes the demister (7) for 2-5min every 1h, and the washing strength is 0.7-1L/(s-square meter).

4. The pipe spraying method according to claim 2 or 3, wherein the desulfurization agent is one or a mixture of at least two of a sodium hydroxide solution, a sodium carbonate solution, a sodium bicarbonate solution, an ammonia solution, a methamine solution, an anthraquinone disulfonic acid solution, a picric acid solution, a hydroquinone solution, an iron complex solution, a tannin extract solution and a sodium vanadate solution with a concentration of 1% to 30%, or one or a mixture of at least two of an N-methyldiethanolamine solution, an organic amine solution, a PDS solution and an alkanolamine solution with a concentration of 1% to 30% for removing carbonyl sulfide.

5. The pipeline spraying method according to claim 2, wherein the size of the desulfurization agent atomized by the spraying device (5) is 20-200 microns.

Technical Field

The invention relates to the technical field of blast furnace gas desulfurization, in particular to a pipeline spraying system and a pipeline spraying method for removing organic sulfur or inorganic sulfur from blast furnace gas.

Background

Blast furnace gas is one of the most important secondary energy sources of iron and steel enterprises, and has wide application. Where the fuel is used for combustion heating, desulfurization is typically accomplished by end-treatment. Before the ultralow emission of the steel enterprises is carried out, the flue gas generated after the blast furnace gas is used for combustion is generally directly emitted, and SO in the flue gas₂The concentration is usually more than 100mg/Nm³. But as the national environmental protection policy is tightened, the standards are tightened increasingly, and higher requirements are put forward on emission.

Under the background of ultralow emission, the conventional tail end treatment mode is adopted, the investment cost is high, and the tail end cannot be completely discharged according to the standard, so that the source treatment is carried out, and the blast furnace gas fine desulfurization is the most economic and convenient technical means for the management of iron and steel plants. Meanwhile, the nation will classify iron and steel enterprises, and blast furnace gas desulfurization is an important judgment of a class a enterprise.

The key of blast furnace gas desulfurization is the control and reduction of organic sulfur in the gas. In the prior art, the process of removing organic sulfur in industrial gas generally adopts a process of firstly hydrolyzing or hydrogenolyzing and then selecting a dry method to remove hydrogen sulfide. The solid particles used for hydrogen sulfide removal by hydrolysis, hydrogenolysis or a dry method are conversion catalysts or adsorbents, the solid particles have the advantages of large resistance in operation, large occupied area and high investment cost, and need to be replaced periodically, so that a large amount of solid pollutants are generated, the treatment difficulty is high, and the cost is high.

Disclosure of Invention

The invention provides a pipeline spraying system and a method for removing organic sulfur or inorganic sulfur from blast furnace gas, aiming at solving the technical problems of large running resistance, large occupied area, high investment cost and generation of solid pollutants in the conventional blast furnace gas desulfurization mode.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a pipeline spraying system for blast furnace gas desorption organic sulphur or inorganic sulphur, it includes nitrogen gas device, charge device, washing unit, effluent plant, spray set, pipe device and defogging device, wherein: the outlet of the nitrogen device is connected with the gas inlet of the spraying device, the outlet of the dosing device is connected with the liquid inlet of the spraying device, the outlet of the spraying device is installed in the pipeline device, the inlet of the pipeline device is connected with a blast furnace gas pipeline, the outlet of the pipeline device is connected with the inlet of the demisting device, the outlet of the flushing device is connected with the demisting device, the inlet of the wastewater device is connected with the liquid outlet at the bottom of the demisting device, and the gas outlet of the demisting device is connected with the pipeline of each blast furnace gas user side.

The pipeline spraying system for removing organic sulfur or inorganic sulfur from blast furnace gas comprises the following steps:

s1, the ratio of the desulfurizing agent to the nitrogen gas is 0.2-0.3m³: 1L of the mixture is fully mixed and then enters a spraying device to atomize the desulfurization agent;

s2, allowing the blast furnace gas to enter a pipeline device at a flow speed of 9-12m/S, carrying out contact reaction with the atomized desulfurization agent in the pipeline device 6, and removing organic sulfur or inorganic sulfur in the blast furnace gas after the contact reaction;

s3, enabling the desulfurized blast furnace gas to enter a demisting device, separating liquid drops carried in the gas flow out through a bent channel in the demisting device under the action of inertia force and gravity, and flushing the demisting device by a flushing device regularly and quantitatively in the running process of the demisting device;

s4, allowing the liquid drops separated by the defogging device and the washed wastewater to flow into the wastewater device, and conveying the clean gas separated by the defogging device into gas pipelines at each user end.

Optionally, the washing device washes the demister for 2-5min every 1h, and the washing strength is 0.7-1L/s square meter.

Optionally, the desulfurization agent is one or a mixture of at least two of a sodium hydroxide solution, a sodium carbonate solution, a sodium bicarbonate solution, an ammonia solution, a methyl ethanolamine solution, an anthraquinone disulfonic acid solution, a picric acid solution, a hydroquinone solution, an iron complex solution, a tannin extract solution and a sodium vanadate solution with the concentration of 1-30%, or one or a mixture of at least two of an N-methyl diethanol amine solution, an organic amine solution, a PDS solution and an alcohol amine solution with the concentration of 1-30% for removing carbonyl sulfide.

Optionally, the size of the desulfurization agent atomized by the spray device is 20-200 microns.

The invention has the beneficial effects that:

the pipeline spraying process replaces the conventional tower reactor, so that the occupied area and the equipment investment cost are greatly saved. The removal agent replaces an organic sulfur catalyst and removes inorganic sulfur particles through a pipeline spraying process, so that the running resistance of the system is greatly reduced, the system pressure is saved, more energy is provided for TRT power generation, and a large amount of solid pollutants can not be generated.

Drawings

FIG. 1 is a schematic diagram of the composition structure of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the pipeline spraying system for removing organic sulfur or inorganic sulfur from blast furnace gas in this embodiment includes a nitrogen device 1, a chemical adding device 2, a flushing device 3, a wastewater device 4, a spraying device 5, a pipeline device 6, and a defogging device 7, wherein: the export of nitrogen gas device 1 and spray set 5's gas inlet connection, charge device 2's export and spray set 5's liquid inlet connection, spray set 5's export is installed in pipe means 6, pipe means 6's import and blast furnace gas pipe connection, pipe means 6's export and defogging device 7's access connection, washing unit 3's export and defogging device 7's access connection, waste water installation 4's import and the liquid outlet connection of defogging device 7 bottom, defogging device 7's gas outlet and the pipe connection of each blast furnace gas user side.

Wherein, nitrogen gas device 1 includes pipeline, valve, manometer, flowmeter and air-vent valve etc. and nitrogen gas gets into spray set 5 through the pipeline. The valve, the pressure gauge, the flowmeter and the pressure regulating valve are arranged on the pipeline. The dosing device 2 comprises a reagent tank, a connecting pipeline, a valve, a liquid level meter, a pressure gauge, a flow meter, a filter and a reagent pump, and the desulfurization reagent in the reagent tank is conveyed to the spraying device 5 through the connecting pipeline under the action of the reagent pump. The spraying device 5 comprises a pipeline, a valve, a pressure gauge and a spray gun, and the atomized desulfurization agent is sprayed out of the spray gun through the pipeline. The pipe arrangement 6 comprises a blast furnace gas delivery pipe. Defogging device 7 includes defroster and defogging tower, and the defroster is installed in the defogging tower. The flushing device 3 comprises a process water tank, a flushing water pump, a connecting pipeline, a liquid level meter, a valve, a pressure gauge, a spraying pipeline and a nozzle, and water in the process water tank is sprayed to the demisting device 7 from the nozzle through the connecting pipeline and the spraying pipeline under the action of the flushing water pump. Waste water device 4 includes that defogging tower bottom awl fill, pipeline, valve, level gauge, manometer, waste water storage tank and efflux pump are fought, and the waste liquid that gets into waste water storage tank through pipeline and defogging tower bottom awl fill from 7 bottom liquid outlets of defogging device discharges through efflux pump after.

The embodiment of the invention also provides a pipeline spraying method for removing organic sulfur or inorganic sulfur from blast furnace gas, which adopts the pipeline spraying system for removing organic sulfur or inorganic sulfur from blast furnace gas, and comprises the following steps:

s1, the ratio of the desulfurizing agent to the nitrogen gas is 0.2-0.3m³: 1L of the mixture is fully mixed and then enters a spraying device 5 to atomize the desulfurization agent.

And S2, the blast furnace gas enters the pipeline device 6 at the flow speed of 9-12m/S, and is subjected to contact reaction with the atomized desulfurization agent in the pipeline device 6, and organic sulfur or inorganic sulfur in the blast furnace gas is removed after the contact reaction.

S3, enabling the desulfurized blast furnace gas to enter the demisting device 7, separating liquid drops carried in the gas flow out through a bent channel in the demisting device 7 under the action of inertia force and gravity, and flushing the demisting device 7 by the flushing device 3 regularly and quantitatively in the running process of the demisting device 7.

The washing device 3 regularly washes the demisting device 7 in a quantitative mode to prevent the demisting device 7 from being blocked due to scaling.

S4, the liquid drops separated by the demisting device 7 and the washed waste water flow into the waste water device 4, and the clean gas separated by the demisting device 7 is sent to the gas pipelines of each user terminal.

Optionally, the washing device 3 washes the defogging device 7 for 2-5min at intervals of 1h, and the washing strength is 0.7-1L/s square meter.

Optionally, the desulfurization agent is one or a mixture of at least two of a sodium hydroxide solution, a sodium carbonate solution, a sodium bicarbonate solution, an ammonia solution, a methyl ethanolamine solution, an anthraquinone disulfonic acid solution, a picric acid solution, a hydroquinone solution, an iron complex solution, a tannin extract solution and a sodium vanadate solution with the concentration of 1-30%, or one or a mixture of at least two of an N-methyl diethanolamine solution, an organic amine solution, a PDS solution and an ethanolamine solution with the concentration of 1-30%. Of course, the desulfurization agent may be other agents selected according to the desulfurization requirement, and this embodiment is not particularly limited thereto.

Optionally, the size of the desulfurization agent atomized by the spraying device 5 is 20-200 microns, so as to increase the specific surface area and uniformly distribute the agent amount.

In summary, the following steps: the invention replaces the conventional tower reactor by a pipeline spraying process, thereby greatly saving the occupied area and the equipment investment cost. The agent is removed through a pipeline spraying process to replace an organic sulfur catalyst and remove inorganic sulfur particles, so that the running resistance of the system is greatly reduced, the system pressure is saved, and more energy is provided for TRT power generation.

It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.