JPS60170693A - Connected process of coal liquefaction process and coke preparation process - Google Patents

Abstract

PURPOSE:To obtain a liquefied oil under mild reaction conditions simply, by using a saccharide tar as a solvent for coal liquefaction, and coal obtained from solvent purification as an addition agent for preparation of coke for metallurgy. CONSTITUTION:A coke oven gas evolved from the coke oven 1' is partially used as a fuel for the coke oven 1' and the rest is sent to the hydrogen purifying device 2'. The coke oven gas is blended with hydrogen from the coal liquefying process 3' and a hydrocarbon gas by the device 2', purified and as a hydrogen gas rich is hydrogen for coal liquefaction is sent to a coal liquefaction process. A high-calorie gas rich in hydrocarbon gas prepared as a by-product by the device 2' as a fuel is sent to the coke oven 1' or the coal liquefaction process 3'. Crude tar prepared by the oven 1' is directly fed to the process 3'. In the process 3', coal is liquefied in the presence of a solvent for liquefaction and hydrogen, separated into an exhaust gas, a liquefied oil, coal obtained from solvent purification, and an insoluble substance, and the exhaust gas is returned to the device 2'. The coal obtained from solvent purification is sent to the coke oven 1'.

Description

Detailed Description of the Invention The present invention uses crude tar and coke oven gas obtained in the coke manufacturing process as a coal liquefaction process agent and hydrogen, and uses purified coal as a bath agent obtained in the coal liquefaction process for coke. The present invention relates to a combined coal liquefaction process and coke production process characterized in that coke for metallurgical use is produced by blending into coal charged in a furnace.

Conventionally, hydrogen for 1 coal liquefaction is produced in the filtration coal liquefaction process, fJy,
A portion of Mt.Suruun is reused. therefore.

In order to compensate for the loss of solvent to the outside of the yarn, it is necessary to recover the solvent from the coal mixture in a cylindrical tube 4, which inevitably leads to severe release conditions and lower operating and equipment costs for the coal pasture process. becomes higher. Therefore, there are 5 methods to compensate for the loss of solvent to the outside of the system.
15), a method of supplementing with crude tar obtained from a coke oven (Japanese Unexamined Patent Publication No. 58-93787), etc. are known. However, even in these σ) methods, most of the solvent is oil produced in the coal liquefaction process, so it is unavoidable that the liquefaction conditions are severe. Moreover, it is not preferable to recirculate a large amount of 1-l/lit produced in one coal liquefaction process as a bath agent, considering the efficiency of the apparatus.

- Hydrogen for coal liquefaction is usually produced in a coal gasification plant as a raw material for coal liquefaction or as a part of coal for coal production. For this reason, it is necessary to construct a cassification plant alongside the liquefaction plant, and the price of one coal liquefaction process becomes more expensive due to the construction and operating costs of the gasification plant and the use of expensive coal liquefaction as raw material. It becomes something.

As described above, in the conventional coal liquefaction method, the cost of securing a bath agent and hydrogen for coal liquefaction is extremely low, which has significantly hindered the industrialization of coal liquefaction.

The inventors of the present invention have made extensive efforts to develop a more economical coal liquefaction method that reduces the cost of securing bath agents and hydrogen for coal liquefaction and has a high yield of purified coal for bath agents. Result 1
We have completed the present invention, which combines a coal liquefaction process and a coke production process.

That is, 1. The present invention is used in the coal liquefaction process as a crude tarry coal liquefaction agent obtained in the coke manufacturing process, and also purifies the mixed gas of coke oven dregs and waste dregs from the coal liquefaction process to produce hydrogen for coal liquefaction. Coal liquefaction process characterized in that all or part of the bath agent refined coal obtained in the coal liquefaction process is blended into the coal charged in the coke oven. It's a process.

A: The raw tar used in the invention is the coal tar before fractional distillation obtained from the coke oven used in the coke oven or the carbonization furnace during the production of molded coke, or the coal tar after fractional distillation. It is also possible to use a mixture of these oils before and after fractional distillation.

Coke oven scum is the energy obtained from the above-mentioned coke oven and carbonization furnace.

An embodiment of the method for combining the coal and coke production process and the coke production process according to the present invention will be described with reference to FIG.

A portion of the coke oven dregs discharged from the coke oven 1' is sent along line a, while a portion thereof is used as fuel for the coke oven, and the remainder is sent to the hydrogen purification device 2'. In the hydrogen refining equipment 2', the coke oven gas, the hydrogen coming from the coal liquefaction process 3' through the line C, and the exhaust gas mainly composed of hydrocarbon gas are mixed and purified to produce hydrogen-rich coal liquefaction. It becomes hydrogen and is sent to the coal liquefaction process through line b. Moreover, the municipal gas of hydrocarbon sludge produced as a by-product in the hydrogen purification apparatus 2' is sent as a fuel to a coke oven or a coal storage 11Z process 3' via a line b'. coke oven 1
The crude tar produced in step ' is passed through line d and sent to the direct coal sludge process 3'. Here, the tar can be mixed with a part of the bath agent recovered in the coal liquefaction step 3' and used as a bath agent for coal liquefaction. (In the illustrated coal liquefaction process 3', Linqingchen, Chilinken coal, and lignite temple coals are liquefied in the presence of a coal liquefaction bath agent and hydrogen Q, and the scum is discharged. Common agent charcoal making and non-bath sex wJ Kato! i11. I can do it. Complete short housing for separated exhaust gas 1
Kohaso σS-Miyako follows line C to Hydrogen 14i Ironworks Direction 2
', and the remainder is recycled and used in the coal liquefaction step 34', where hydrogen for coal liquefaction is mixed with gas for preparing hydrogen-enriched U.

(not shown). The liquefied oil is discharged out of the line as an 'at product, but a portion can also be recycled as a coal liquefaction agent. Further, the entire amount or a portion of the bath agent refined coal is sent to the coke oven 1' through the line f, and is blended into the coal charged in the coke oven to be coked. coke g
31' is the manufacturing field for metallurgical coke (line e))
The coal liquefaction process of the present invention will be explained in detail with reference to FIG. 2.

Coal that has been previously crushed and dried to an appropriate particle size and coal liquefaction agent are mixed in a mixing Il to form a slurry. At this time, it is preferable to use the entire amount of crude tar as the bath agent for coal liquefaction, but it is also possible to use the tar containing cyclic torture collected from the vaporization equipment 11 of this process. When the circulating 61 agent σ) mixture amount exceeds 50 wt%, the yield of the products, ie refined coal and liquefied oil σ), decreases. If necessary, you can saturate Sura IJ Ig with a catalyst consisting of a monster compound temple. In order to increase the throughput of coal, it is advantageous to have a large ratio of coal/bath agent, but at the same time, the viscosity of the slurry increases by -65%, increasing the load on the pump. therefore.

The weight ratio of coal/bath agent is preferably 110.5 to 1/4.

Also, to reduce the slurry viscosity in the mixing volume 1.

The bath salt may be heated to 80 to 150 degrees Celsius before supplying it, or the mixture may be heated to 80 to 150 degrees Celsius.

The slurry adjusted as above is 70 jo/cnI fist G or more with slurry feed pump 2, preferably 100
Dust pressurized to ~150kg/ca11G can be completely mixed with scum with a hydrogen concentration of 70VO1% or more that has been previously pressurized and heated to the same pressure. If the hydrogen concentration in the waste is less than 70 VOI, the partial pressure of hydrogen in the reactor will decrease during liquefaction of coal, which will cause troubles such as coking, which is not preferable. Hydrogen Ij! i 7 ovo In order to obtain a slag of 1% or more, the waste slag sent from the hostile scum removing device 6 can be partially mixed with hydrogen for coal liquefaction having a hydrogen concentration of 80 VOl or more. Thereby, it is possible to control the amount of waste gas sent to the hydrogen purification device M and reduce the load on the hydrogen purification device. Then, the slurry IJ- is introduced into the heating furnace 3 and the temperature is 30-
It is heated to a temperature in the range of 0 to 500°C, preferably 350 to 470°C, and introduced into one reactor 4. The residence time in the reactor is at most 120 minutes, preferably 10 to 60 minutes. After the Shichiki substance in the coal is sufficiently dissolved in the stone agent through the above-described treatment, the dregs-like product is separated by the ki τ 佼 pulverizer 5. The separated scum-like product is sent to the hostile gas removal device 6, where hostile gases such as hydrogen sulfide and carbonic acid scum are removed and the hydrogen concentration is improved. Then, it is sent to a hydrogenation equipment (Fig. 1, 2'), and the remainder is mixed with a bath agent for coal liquefaction to prepare hydrogen magnetism and subjected to an sP+ reaction. −10,000, unbathed coal from which dregs have been separated, ash,
After the coal bath liquid consisting of the catalyst and mm coal is depressurized through the pressure reducing valve 7, it is subjected to U-filter and centrifugal separation depending on the case.

Solid separation equipment such as liquid cyclone or solvent extraction method [8
A four-bath substance consisting of unbathed cracked coal, ash, catalyst, etc. is separated into M1. Next, the coal bath liquid from which the four-bath substances have been separated or the coal bath liquid from which the non-bath substances have not been separated is introduced into the evaporator through the heating furnace 9, and the liquid product and the residue from the bath are purified. Collect charcoal. Incidentally, it is better to have a lower ash content in the solvent lVJ coal-making σ) obtained here, but li! Ll liquid separator ασ) Increase in equipment costs and operating costs, and decrease in recovery rate of liquid products and charcoal made from slag agent ασ). The ash content is 10wt% or less, preferably 4
It is preferable to separate the four-bath substances so that the amount is less than wt%. Reed. The 191 pieces of mature product collected from the evaporator 10 are discharged as a pre-product. Alternatively, it can be purified in the distillation apparatus 11 and used as part of the vi ring I agent.

- 1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,0000,000,0000,0 12w
t% and coked.

As mentioned above, the noteworthy point in the present invention is that by replacing the bath agent for coal liquefaction with coarse tar obtained from a coke oven, there is almost no 8-thickness of the ino-ring bath agent, which has been a necessity in the past. Therefore, it is not necessary to hydrocrack coal to K to obtain a large amount of oil, and most of the obtained oil can be used as a product.

i.e. conventional coal? & Anti-technical method 6, which is more attractive than the chemical method
It can be easily operated under certain conditions. In addition, the bath agent refined coal obtained as the final product after grinding the mixed slurry of crude tar and coal with water is a mixture of the bath agent refined coal, which is a so-called ordinary coal liquefied product, and the hydride of coal tar pitch in the crude tar. The yield is significantly higher than that of the conventional coal liquefaction method (for metallurgical coke production ω≦
It is also good as an additive, needle coke, and carbon material raw material for carbon fiber temples. Liquefied oil is also a religious light product, and it is flexible enough to be used to collect chemical raw materials such as BTX, and it is also useful to use it as fuel oil for teasel engines.

In addition, the mixed scum of coke oven gas and waste sludge recovered from the coal liquefaction process of the present invention was used in a hydrogenation equipment (Fig. 1, 2').
1 coal liquefaction process (Fig. 1 3'
] The hydrogen required for coal conversion is the first line by -
can be fully compensated for. At the same time, the gas that is produced as a by-product during the refining of the mixed gas is red caloric waste that contains a large amount of hydrocarbon residue, and it passes through the first line b' and becomes the fuel for coke ovens, not the coal liquefaction fuel σ)1. It can be used as a part. In particular, heating furnaces that require extensive control can be used as J fuel, making the operation of the 1 coal Europeanization process (Fig. 1 3') easier and reducing fluctuations in fuel costs.
I can say ti.

In addition, when the hemorrhoid sheath charcoal of the present invention is used as a removing stiffener for producing coatas for old buildings, a portion of the highly caking coal in the blended ash charged into a coke oven becomes non-caking, with no caking at all. It can be used directly with charcoal, making it ideal for areas where it is difficult to supply strong coking coal. Moreover, the construction of the present invention's coal filtration process and coke coating process in 10 areas adjacent to the steelworks.

The 78-karat gold coke obtained by the method of the present invention can be directly supplied to a steel mill, resulting in a more convenient coal liquefaction process.

Hereinafter, the present invention will be explained in more detail with reference to fried foods, but the present invention is not limited thereby.

Example 1 One of the stirrers was charged with 50v of Nippon Kao bituminous coal (anhydrous and ashless base) and 1501 tar recovered from a coke oven, and the initial pressure of the water system was 120 kg.
The temperature was raised to 450°C with a reed at a heating rate of 3°C/min under a pressure of 3°C/cnlG, and held at this temperature for 60 minutes without stirring. So”k* Autoclave C
Separate into liquid and 1 piece. Further, 10 plates (nHrσ) of the beans that reached the cut point of 350°C under reduced pressure were used to collect the liquid product vIJ, which was solid at room temperature, as the residue from the pot. The results are shown in Figure 1.

Comparative Example 1 A 0.5 t autoclave with stirring v=w was used in the same manner as used in Example 1. 1 bottle of circulating bath agent 1,502 liters is produced and the initial pressure of the water is 120/d.
・45 at a heating rate of 3℃/mln under pressure of G
The bales were heated to 0° C. and held at this temperature for 60 minutes with stirring. The bales were treated in the same manner as in Example 1 to remove the dregs, liquid product, and bath powder sheath charcoal. Results first
Shown in the table.

The common understanding rate of 1 coal from 1st coating is ``11'' and comparative example 1 are the same clay, but the liquid product company is using the method of the present invention. There are many cases where there is no need to wash the bath salts.
i8′! .

It is also common because one pitch of starch syrup in citrus tar is said to be one pitch.

Kabutouka of Kasu clearly has a lot of power in implementation.

In particular, since a large amount of methane, ethane, etc. are produced, the gas black key is effective and can be used as a source for coke ovens and coal ratio processes.

As described above, the combined coal-coke processing process according to the method of the present invention has low yields of liquid and solid products, and generates a large amount of caloric gas compared to the conventional method. This is a very clever and Hongji method.

Comparative Example 2 Japanese g was placed in the same autoclave as used in Example 1.
, f charcoal soy (ashless base), crude tar 751 recovered from a coke oven as a bath agent, and circulation bath agent 751, which was previously produced by hydrogenating this Japanese PR theory bamboo charcoal, were added to form a slurry. Similar to Example 1, this is a common interpretation. The results will be shown in the first section.

Example 2 The same product as Example 1 was prepared in Xiangzhou Seriya U: Government Charcoal Bath. The results are shown in Table 1.

Example 3 In the same autoclave used in the practical direction, 50% of Yishu Niraguri brown coal was placed in a similar autoclave. (Anhydrous and ashless base) and recovered from coke ovens.Re1 original tar 150y and 111! medium to 0.7
5f' was added to form a slurry and was commonly understood as the same as Example 1. A Riki is listed in the first table.

[Brief explanation of the drawing]

FIG. 1 is a flow sheet showing one embodiment of the present invention, and FIG. 2 is a flow sheet showing one embodiment of the liquefaction process of the present invention. In the figure, 1'...Coke oven, 2'...Hydrogen purification equipment,
3'... Coal liquefaction equipment, a... Coke oven waste line, b... Hydrogen line, b'... Cutting waste line,
C... Coal liquefaction process waste slurry 1 line, d... Crude tar line, e... Coke line, l... Mixing line, 2
...Slurry feed pump. 3... Heating furnace, 4... Reactor, 5... Gas-liquid separator, 6... Rubber gas removal gear 2.7... Pressure reducing valve, 8...
...li! J liquid separation device.

Claims (1)

[Claims] 1. The crude tar obtained in the coke manufacturing process is used as a bath agent for coal liquefaction in the coal liquefaction process, and the mixed gas of coke oven gas and waste residue from the coal liquefaction process is purified to produce coal. Coal liquefaction process-coke production process combination characterized in that all or part of the bath agent refined coal obtained in the coal liquefaction process is used as hydrogen for liquefaction in the coke oven charging coal. process. 2. The combining process according to claim 1, characterized in that the entire amount of hydrogen for the coal liquefaction is provided by crude tar obtained in the coke manufacturing process. 3. The bonding process according to claim 1 or 2, characterized in that the hydrogen purity in the hydrogen for coal liquefaction is 70 VOl or more.