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Composite desulphurization method and device for high-sulfur coal

A desulfurization device and coal technology, applied in the field of coal desulfurization, can solve the problems of high cost, large amount of chemical reagents, long microwave irradiation time, etc., and achieve the effect of cost reduction

Inactive Publication Date: 2014-07-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Research on combined removal of organic sulfur in coal by microwave radiation oxidation [J]. However, due to the large amount of chemical reagents and long microwave irradiation time, the cost is too high

Method used

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  • Composite desulphurization method and device for high-sulfur coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The high-sulfur coal composite desulfurization device described in this embodiment is as follows: figure 1 As shown, it includes a reactor 1, a circulation pump 2, a circulation heating pipe 3 and a microwave heater 4. The liquid outlet of the reactor 1 is connected with the liquid inlet of the circulation pump 2 through a pipe fitting, and the outlet of the circulation pump 2 The liquid port is connected to one end of the circulation heating pipe 3, and the other end of the circulation heating pipe passes through the heating chamber of the microwave heater 4 and is connected to the liquid inlet of the reactor. The reactor is a cube-shaped container, and the part of the circulating heating pipe located in the heating chamber of the microwave heater is a wave-shaped curved pipe.

[0024] Using the above-mentioned high-sulfur coal compound desulfurization device to carry out the method for compound desulfurization of high-sulfur coal, the process steps are as follows:

...

Embodiment 2

[0030] The difference between the high-sulfur coal compound desulfurization device described in this example and the device described in Example 1 is that the reactor is a cylindrical container.

[0031] Using the above-mentioned high-sulfur coal compound desulfurization device to carry out the method for compound desulfurization of high-sulfur coal, the process steps are as follows:

[0032] ①Put 100g of high-sulfur coal (3.2% sulfur by mass) pellets with a particle size of 0.5mm into the reactor, and add them to the reactor at a mass ratio of high-sulfur coal pellets to water of 1:0.8 water, then open the circulation pump 2 and microwave heater 4 in the high-sulfur coal composite desulfurization device, keep the flow velocity of the circulation pump as 0.01m / s, the frequency of microwave heater 4 is 2.45GHz, and the power is 1000W, so that the coal The water mixture liquid is preheated for 15 minutes in a circulating flow state, and the microwave heater 4 is turned off after...

Embodiment 3

[0037] The difference between the high-sulfur coal compound desulfurization device described in this example and the device described in Example 1 is that the reactor is a spherical container.

[0038] Using the above-mentioned high-sulfur coal compound desulfurization device to carry out the method for compound desulfurization of high-sulfur coal, the process steps are as follows:

[0039]①Put 100g of high-sulfur coal (3.2% sulfur by mass) pellets with a particle size of 0.3mm into the reactor, and add them to the reactor at a mass ratio of high-sulfur coal pellets to water of 1:1.5 water, and then open the circulating pump 2 and the microwave heater 4 in the high-sulfur coal composite desulfurization device, keep the flow velocity of the circulating pump as 0.04m / s, the frequency of the microwave heater 4 is 2.45GHz, and the power is 1200W, so that the coal The water mixture liquid is preheated for 15 minutes in a circulating flow state, and the microwave heater 4 is turned ...

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Abstract

The invention discloses a composite desulphurization device for high-sulfur coal. The composite desulphurization device comprises a reactor, a circulation pump, a circulation heating pipe and a microwave heater. A composite desulphurization method for high-sulfur coal uses the device and comprises the following steps: (1) adding water and high-sulfur coal particles into the reactor according to a mass ratio of the high-sulfur coal particles to the water being 1: (0.8-1.5), starting the circulation pump and the microwave heater, preheating for 5-15 minutes, and stopping the microwave heater; (2) adding concentrated sulfuric acid and concentrated phosphoric acid into the reactor, adding potassium permanganate, stopping the circulation pump, and standing the mixture solution for 1-2 hours, wherein the volume ratio of concentrated sulfuric acid to the water in the step (1) is (9-10):100, the volume ratio of concentrated phosphoric acid to the water in the step (1) is (0.8-1.2):100, and the additive amount of potassium permanganate is 1%-1.5% of the mass sum of concentrated sulfuric acid, concentrated phosphoric acid and the water in the step (1); and (3) starting the circulation pump and the microwave heater for heating for 10-30 minutes.

Description

technical field [0001] The invention belongs to the technical field of coal desulfurization, in particular to a compound desulfurization method and device for high-sulfur coal. Background technique [0002] Compared with the traditional heating method of indirect heating by means of heat conduction, microwave heating is a selective heating method that directly interacts with the heated substance, and has the characteristics of high efficiency and energy saving. The combination of microwave and chemical desulfurization is a new method for desulfurization of high-sulfur coal in recent years. For example, soak coal powder in sodium hydroxide solution and then irradiate it with microwaves (Ding Naidong, Fu Jiawei, Li Zhaoxin, He Qihui, Hu Boxing, Research on Coal Desulfurization Driven by Microwave, "Clean Coal Technology", Vol. 16, No. 4, 20ro, 49-52) , but the lye in this method has a good effect on the removal of inorganic sulfur, but not good on the removal of organic sulfu...

Claims

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Application Information

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IPC IPC(8): C10L9/00C10L9/02C10L9/08
Inventor 陈旭杨晓庆孙迪
Owner SICHUAN UNIV
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