JPS6313792Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an activated carbon regeneration device in a dry desulfurization facility.

A conventional device of this type has a configuration as shown in FIG. 1, for example.

In Figure 1, a is an activated carbon regenerator, b is a saturated activated carbon supply line, c is a recycled activated carbon discharge line,
d is a heating tube, e is an activated carbon filled part, f is a kerosene supply pipe, g is a heating gas generator, h is a heating gas supply pipe, i is a liquefied propane gas supply pipe, j is a desorption gas generator, k is a desorption gas supply pipe, m is a heated used gas discharge pipe, and n is a sulfur dioxide rich gas discharge line.

In other words, in order to regenerate saturated activated carbon that has adsorbed sulfur dioxide, heating gas for raising the temperature of activated carbon and sulfur dioxide desorbed from activated carbon are transferred to regenerator a.
A desorption gas is required to discharge the gas from the reactor.
Here, since the activated carbon becomes high temperature in the heating tube d,
If there is a large amount of oxygen in the desorption gas, it will burn, so conventionally expensive liquefied propane gas is combusted to generate gas with a low oxygen concentration, which is used as the desorption gas. However, since the heating gas does not come into direct contact with the activated carbon, there is no need for a low oxygen concentration, and inexpensive kerosene combustion gas is used.

In this way, conventionally, two units, the heating gas generator g and the desorption gas generator j, are required.
The disadvantages were that the equipment costs were high, the amount of liquefied propane gas used was large, and the operating costs were high.

This invention is a dry desulfurization equipment that can reduce equipment costs and operating costs by using only one gas generator and eliminating the need to use expensive liquefied propane gas. The object of the present invention is to provide an activated carbon regeneration device.

For this reason, the configuration of the present invention is such that the activated carbon regenerator has a saturated activated carbon supply line connected to the top, a recycled activated carbon discharge line connected to the bottom, and a heating tube that heats the activated carbon from the outside through the activated carbon inside. a gas generator that is installed outside the vessel and generates a heating gas with a low oxygen concentration; a heating gas supply pipe that supplies the heating gas from the gas generator to the outside of the heating tube; a heated used gas discharge pipe for discharging the gas from the regenerator, and a part of the heated used gas discharged from the gas discharge pipe branched from the middle of the gas discharge pipe to supply a part of the heated used gas from the gas discharge pipe to the heating pipe. The invention is characterized in that it is equipped with a desorption gas supply pipe.

An embodiment of the present invention will be described below with reference to FIG.

In FIG. 2, 1 is an activated carbon regenerator, 2 is a saturated activated carbon supply line connected to the top of the regenerator 1, 3 is a recycled activated carbon discharge line connected to the bottom of the regenerator 1, and 4 is an activated carbon inside. 5 is an activated carbon filled part, 6 is a kerosene supply pipe, 7 is a gas generator installed outside the regenerator 1 and generates a heating gas with a low oxygen concentration, 8
9 is a heating gas supply pipe that supplies the heating gas from the gas generator 7 to the outside of the heating tube 4; 9 is a heated used gas discharge pipe that discharges the heated used gas from the regenerator 1; 10 11 is a desorption gas supply pipe that is branched from the middle of the gas exhaust pipe 9 and supplies a part of the heated and used gas from the gas exhaust pipe 9 to the inside of the heating pipe 4; 11 is a sulfur dioxide supply pipe; This is the rich gas discharge line.

In the activated carbon regeneration device in the dry desulfurization equipment configured as shown in FIG. 1, and while flowing down inside the heating tube 4, it is indirectly heated from the outside of the heating tube 4 by the heating gas described later, and the temperature is raised to about 350 to 420℃, and the sulfur dioxide in the activated carbon is heated. emit. The regenerated activated carbon is discharged from the reactivated carbon discharge line 3,
Reused for adsorption of sulfur oxides. On the other hand, the heating gas generator 7 burns kerosene from the kerosene supply line 6 and is controlled so that the heating gas has an oxygen concentration of 1.5% or less. The heating gas generated by the gas generator 7 is supplied to a heating gas supply pipe 8.
The activated carbon is supplied to the outside of the heating tube 4 through the heating tube 4, and the activated carbon passing through the inside of the heating tube 4 is heated as described above. The heated gas cools down and is discharged from the heated used gas discharge pipe 9, but part of it passes through the desorption gas supply pipe 10 and is discharged from the upper and lower parts of the regenerator 1 into the heating pipe 4. The sulfur dioxide released inside the heating tube 4 is entrained in the sulfur dioxide rich gas, which is discharged from the discharge line 11 and sent to the next process.

As described above, according to the present invention, there is no need to provide a desorption gas generator like in the past, and therefore, the desorption gas generator and its ancillary equipment can be omitted, and the equipment cost can be reduced accordingly. In addition to eliminating the need to use expensive liquefied propane gas as the desorption gas, operating costs are significantly reduced because all heated gas is used as the desorption gas. The effects of this invention are extremely large.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of a conventional device, and FIG. 2 is an explanatory diagram showing an embodiment of the present invention. 1...Activated carbon regenerator, 2...Saturated activated carbon supply line, 3...Regenerated activated carbon discharge line, 4...Heating tube, 7...Gas generator, 8...Heating gas supply pipe, 9...Heating use desorption gas discharge pipe, 10... gas supply pipe for desorption.

Claims (1)

[Scope of utility model registration request] In an activated carbon regenerator having a saturated activated carbon supply line connected to the top, a recycled activated carbon discharge line connected to the bottom, and a heating tube for passing activated carbon inside and heating from the outside, a gas generator that generates a heating gas having an oxygen concentration; a heating gas supply pipe that supplies the heating gas from the gas generator to the outside of the heating tube;
A heated used gas exhaust pipe for discharging the heated used gas from the regenerator, and a heated used gas exhaust pipe provided in a branch shape from the middle of the gas exhaust pipe to discharge a part of the heated used gas from the gas exhaust pipe to the heated used gas. 1. An activated carbon regeneration device in a dry desulfurization facility, comprising a desorption gas supply pipe that is supplied into the pipe.