CN1827739A - Generating furnace tar treatment method - Google Patents

Abstract

The invention relates to a method for handling producer gas tar, which is characterized in that: reducing the viscosity of I coke tar or II coke tar by heating, removing the moisture contained in I coke tar or II coke tar by air-blowing dehydrolyzing method; produing the coke and tar oil distillate by method of high temperature carbonization; adopting tar oil distillate to extract the mixing phenol; the significant effect of this invention is that it can produce modified components of coke, mixing phenol and fuel oil by low-temperature blowing, bubbling, de-watering, charring, alkali cleaning and acid cleaning the I coke tar or II coke tar which is hard to transport or deal with and can be easily contaminated. The invention not only solves the problems of environmental contamination brought by producer gas tar, but also improves the self-value of the producer gas tar and makes the precious hydroxybenzene resources put to effective utility.

Description

The treatment process of producer gas tar

Technical field

The present invention relates to thickness plasticity treatment of organic matters of organic technical field, particularly relate to the treatment process of producing the thickness plasticity coalite tar of coal gas by-product with producer gas generator.

Background technology

Producing coal gas with producer gas generator is the main production that many in the world countries obtain lower heating value coal gas.In process of production, the raw gas of producer gas generator output is being mingled with tar steam, coal dust, coal ash in the condition of high temperature and is overflowing together.Make the raw gas cooling with the cold water spray, behind cutting out partial coal tar and coal dust, the coal ash, raw gas is pounced on remaining tar of collection and part moisture through the tar device again.Coal tar, coal dust, the coal ash that produces with cold water spray cooling washing raw gas forms viscous mixture and a large amount of water flows into the tar settling tank, the II level tar that divides the coalite tar that obtains after dried up to be commonly called as.This part tar water content height, general water content remove this and also are being mingled with coal dust and coal ash more than 20%, are solid shape at normal temperatures.Pounce on the coalite tar that collects through the tar device and be commonly called as I level tar, this part tar contains the phenol amount than higher, and generally about 15%, ash is low, and is moisture about 10%, at normal temperatures, mobile very poor.

Because the character of I level tar and II level tar is more special, carry and use aspect all existing certain difficulty, generally be act as a fuel oily allotment component or of I level tar as the binding agent of moulded coal.The domestic fuel of II level tar as the rural area.Because I level tar and distinctive smell of II level tar and incomplete combustion, contaminate environment but also cause the waste of phenol resource not only.

Summary of the invention

The purpose of this invention is to provide a kind of with I level tar or II level tar as the high temperature carbonization raw material, produce the method for coke, carbolic oil cut and light-weight fuel oil.The present invention is after I level tar or II level tar are reduced viscosity through heating, adopts the method that is blown into air dehydration to remove the moisture that I level tar or II level tar contain; Adopt the method for high temperature carbonization to produce coke and coal tar fraction; Utilize coal tar fraction to extract mixed phenol.

The treatment process of producer gas tar is characterized in that this method comprises the steps:

1) with I level tar or II level tar with the lifting hopper high-order bubbling style dehydration still of packing into, material adds thermal material to 85-98 ℃, according to being blown into air capacity and tar 200m ³/ t ratio is blown into air dehydration, and the water content of I level tar after the dehydration or II level tar is less than 0.2%, and flows into coker by himself gravity;

2) through after the 450-700 ℃ of heating charing, coke discharging is to cooling tank in coker for I level tar after the dehydration or II level tar, and cooled coke is as solid phase prod; Coker top distilled tar steam flows into the tar storage tank after condensation, cooling;

3) tar by be pumped into alkali cleaning, pickling tank is isolated mixed phenol and oil fuel component.

The invention has the beneficial effects as follows difficulty conveying, I level tar or II level tar difficult, easy pollution are passed through the dehydration of low-temperature blowing bubbling, charing, alkali cleaning and pickling, produce coke, mixed phenol and oil fuel allotment component.Not only solve the problem of environmental pollution that producer gas tar brings, and make producer gas tar improve self-value, valuable phenol resource is effectively utilized.

Embodiment

Embodiment 1:

Producer gas tar property list 1

	Moisture %	Ash content %	Fugitive constituent %	Density g/d 20	Viscosity E100	Phenol content %
							I level tar	10.2	0.98	70	1.16	12	15.7
II level tar	28.0	7.40	55	1.25	23	7.6

The treatment process of producer gas tar is characterized in that its manufacturing step is as follows:

1) with the I level tar of character such as table 1 with the lifting hopper high-order bubbling style dehydration still of packing into, material adds thermal material to 92 ℃, according to being blown into air capacity and tar 200m ³/ t ratio is blown into air dehydration, and the I level tar water content after the dehydration is less than 0.2%, and flows into coker by himself gravity.

2) the I level tar after the dehydration heats charing to 650 ℃ in coker, and the coke of generation enters to cooling tank, is cooled to below 100 ℃ to go out device; Coker top distilled tar steam flows into the tar storage tank after condensation, cooling.

3) tar mixes by being pumped into the aqueous sodium hydroxide solution of alkali cleaning mortise with 15% concentration, 60 ℃ of temperature of reaction, and phenol and sodium hydroxide (100%) ratio is 1: 0.5.After the complete reaction, through static layering, separating tar and phenol sodium water solution; The phenol sodium water solution by being pumped into pickling tank, is not higher than 90 ℃ in temperature of reaction again, under pressurized air bubbling stirring condition, slowly splashes into the sulfuric acid of concentration 75%, through fully react be acidity to solution after, static again 4 hours, isolate mixed phenol.

Product yield, the coke nature of producing sees Table 2, table 3

Product yield table 2

I level tar %	Coke %	Oil fuel %	Mixed phenol %	Water adds loss %
					100	43	31.8	10.2	15

Coke quality table 3

Moisture %	Ash content %	Volatile matter %	Sulphur content %	Physical strength, Kg
					1.20	2.23	3.40	0.43	301

Embodiment 2

The treatment process of producer gas tar is characterized in that its manufacturing step is as follows:

1) with the II level tar of character such as table 1 with the lifting hopper high-order bubbling style dehydration still of packing into, material adds thermal material to 98 ℃, according to being blown into air capacity and tar 200m ³/ t ratio is blown into air dehydration, and the II level tar water content after the dehydration is less than 0.2%, and flows into coker by himself gravity.

2) the II level tar after the dehydration heats charing to 500 ℃ in coker, and the coke of generation enters to cooling tank, is cooled to below 100 ℃ to go out device; Coker top distilled tar steam flows into the tar storage tank after condensation, cooling.

3) tar mixes by being pumped into the aqueous sodium hydroxide solution of alkali cleaning mortise with 15% concentration, 60 ℃ of temperature of reaction, and phenol and sodium hydroxide (100%) ratio is 1: 0.5.After the complete reaction, through static layering, separating tar and phenol sodium water solution; The phenol sodium water solution by being pumped into pickling tank, is not higher than 90 ℃ in temperature of reaction again, under pressurized air bubbling stirring condition, slowly splashes into the sulfuric acid of concentration 75%, through fully react be acidity to solution after, static again 4 hours, isolate mixed phenol.

Product yield, the coke nature of producing sees Table 4, table 5.

Product yield table 4

II level tar %	Coke %	Oil fuel %	Mixed phenol %	Water adds loss %
					100	33	29.6	6.4	31

Coke quality table 5

Moisture %	Ash content %	Volatile matter %	Sulphur content %	Physical strength, Kg
					1.22	31.2	3.40	0.46	264

Claims (1)

1, the treatment process of producer gas tar is characterized in that this method comprises the steps:

1) with I level tar or II level tar with the lifting hopper high-order bubbling style dehydration still of packing into, material adds thermal material to 85-98 ℃, according to being blown into air capacity and tar 200m ³/ t ratio is blown into air dehydration, and the water content of I level tar after the dehydration or II level tar is less than 0.2%, and flows into coker by himself gravity;

2) through after the 450-700 ℃ of heating charing, coke discharging is to cooling tank in coker for I level tar after the dehydration or II level tar, and cooled coke is as solid phase prod; Coker top distilled tar steam flows into the tar storage tank after condensation, cooling;

3) tar by be pumped into alkali cleaning, pickling tank is isolated mixed phenol and oil fuel component.