TWI654291B - Method and system for enhancing the carbon content of carbon-containing materials - Google Patents

Abstract

A method for increasing the carbon content of a carbonaceous material comprises charging a carbonaceous material into a heating chamber, evacuating the internal air of the heating chamber, introducing an inert gas into the heating chamber, and varying in three or more The heating chamber is continuously heated in a temperature state, and each temperature state is maintained for a period of time, so that the weight percentage of the carbonaceous material after the treatment is increased by 20% or more compared with that before the treatment, and the present invention also includes There is a system for performing the method.

Description

Method and system for increasing carbon content of carbonaceous materials

The present invention is directed to increasing the carbon content of carbonaceous materials.

Carbonaceous materials, such as coal, lignin waste materials and rubber tire pellets, are often used as solid fuels, which contain unequal amounts of carbon, sulfur, moisture and volatiles, so the calorific value that can be produced when burned And the pollutants are also different.

In particular, coal is a carbonaceous material that is naturally produced and widely used in industry as a fuel source. Its quality is classified into peat, lignite, and sub-bituminous from low to high. Coal), bituminous coal or anthracite, untreated raw coal will produce lower calorific value, and will cause serious pollution problems after fire. Therefore, before coal burning, such as crushing coal, Screening coal, coal washing, drying, coal blending, etc., are commonly used to increase calorific value and reduce pollution.

Traditional methods for increasing the calorific value of carbonaceous materials face several major issues, such as the need to operate at high temperatures and pressures, or the use of complex systems, which can result in high costs and inefficiencies.

Therefore, it has been developed to develop a method for increasing the carbon content of carbonaceous materials to increase their calorific value.

It is an object of the present invention to provide a method for increasing the carbon content of a carbonaceous material, as well as its calorific value.

In summary, the method comprises the steps of: (i) charging a predetermined amount of carbonaceous material into a heating chamber; (ii) withdrawing the internal air of the heating chamber to bring the pressure to 0.1 atm or below; Iii) introducing an inert gas to the heating chamber to bring the pressure to 1 to 5 atm; (iv) heating the heating chamber to remove moisture and volatile substances from the carbonaceous material to increase the carbon content; (v) cooling and collecting the treated carbonaceous material.

It is important that the heating step is continuously performed under three or more different temperature conditions, and each temperature state is maintained for a period of time, so that the carbon content of the carbonaceous material after treatment is compared with the treatment. The former is a 20% increase or more. In other words, the heating step is controlled such that the three or more different temperature states occur sequentially from low to high, and it is specifically noted that the heating step can be automatically controlled (for example, by computer control). ) or manual control, but the key is that the heating process is carried out under the protection of 1 to 5 atm of the inert gas flow, and the temperature of the one or more is maintained for the three or more different temperature states. For a predetermined period of time, and for different carbonaceous materials, the heating step is also controlled differently for temperature conditions, temperature values, and duration of maintenance.

The carbonaceous material may be coal, carbonaceous lignin waste material or rubber tire particles. For example, the coal includes sub-bituminous coal or lignite, the carbonaceous lignin waste material. Including waste wood, waste wood, wood pellets, wood bricks, palm shells and coconut shells.

The inert gas, such as nitrogen, argon and helium, can often be introduced into the heating chamber to bring the pressure to 1 to 5 atm.

Moreover, within the scope of the present invention, a system for increasing the carbon content of a carbonaceous material is also included.

The system comprises (1) a heating chamber comprising a heating device, a material inlet, a material outlet, a gas inlet and a gas outlet, wherein the heating device is for continuously heating the temperature in three or more different temperature states Heating the chamber and maintaining each temperature state for a period of time; (2) a feeder connected to the material inlet for receiving a carbonaceous material for transporting it to the heating chamber via the material inlet; 3) a cooling device for cooling the carbonaceous material conveyed by the heating chamber through the material outlet for transport to a material storage tank for receiving the carbonaceous material; (4) a vacuum pump for Evacuating the internal air of the heating chamber, the vacuum pump is connected to the gas inlet; (5) a gas storage tank for supplying the inert gas, wherein the gas storage tank is also connected to the gas outlet; 6) a heat exchanger for separating a liquid from the inert gas, the heat exchanger being disposed between the gas outlet and a liquid reservoir for receiving the liquid; and (7) a pressure gauge For measuring the inside of the heating chamber pressure.

Typically, the heating device is used to raise the temperature of the heating chamber at a rate of 5 to 30 ° C/min.

In an exemplary system, the liquid reservoir has an inlet and an outlet connected to the heat exchanger for passage of the inert gas and the liquid, the outlet being connected to a gas purifier for The liquid passes through and the inert gas is purified by the gas purifier.

The system may further include a gas circulation device for conveying the inert gas purified by the gas purification device back to the heating chamber, wherein the gas body circulation device is disposed between the cooling device and the heating chamber, and the The purged inert gas is delivered to the gas circulation device by the gas purification device via the heat exchanger and the cooling device.

The other features, objects, and advantages of the invention will be apparent from the aspects of the appended claims.

The following is a detailed disclosure of a system that increases the carbon content and calorific value of carbonaceous materials.

Referring to FIG. 1 , a system 10 according to a preferred embodiment of the present invention includes a heating chamber 20 , a heat exchanger 22 , a liquid reservoir 24 , a cooling device 30 , a feeder 32 , and a pressure gauge 38 . A vacuum pump 40, a gas reservoir 42, a plurality of valves A, B, C, D, E and F, and a gas purifier 26 and a gas circulation device 36.

As shown in FIG. 1, the heating chamber 20 includes a heating chamber 201, a heating device 202 (for example, a heating furnace), a gas inlet 203, a gas outlet 204, a material inlet 205, and a material outlet 206. The heating device 202 is connected to the heating chamber 201 for continuously heating the heating chamber 20 in three or more different temperature states, and each temperature state is maintained for a period of time.

The feeder 32 is coupled to the material inlet 205 for receiving a carbonaceous material for transport to the heating chamber 20 via the material inlet 205, the heating chamber 20 having a capacity of 1000 Kg or more (eg, 1500 Kg) And 2000Kg) capacity of carbonaceous materials.

The cooling device 30 is for cooling the carbonaceous material conveyed by the heating chamber 20 between the material outlet 206 and a material reservoir 34 for receiving the cooled carbonaceous material. It should be noted that the cooling device 30 includes a high temperature side 301 and a low temperature side 303 connected to the material outlet 206. The low temperature side 303 surrounds the high temperature side 301 to enter the high temperature side. After 301, the carbonaceous material is cooled by contacting the surrounding low temperature side 303.

The vacuum pump 40 is for evacuating the internal air of the heating chamber 20, and the vacuum pump 40 is connected to the gas inlet 203.

The gas reservoir 42 is for supplying an inert gas to the heating chamber 20, and the gas reservoir 42 is also connected to the gas inlet 203.

The pressure gauge 38 is for measuring the internal pressure of the heating chamber 20 and is mounted on a line connecting the gas inlet 203.

The heat exchanger 22 is for separating a liquid from the inert gas, and is disposed between the gas outlet 204 and a liquid storage tank 24 for receiving the liquid. It should be noted that the heat exchanger is 22 also includes a high temperature side 221 and a low temperature side 223. The high temperature side 221 is connected to the gas supply outlet 204. The low temperature side 223 surrounds the high temperature side 221, and after entering the high temperature side 221, the gas is passed through the gas. The gas exiting the heating chamber 20 at the outlet 204 is cooled by contact with the surrounding low temperature side 223 to form the liquid to be separated from the inert gas.

The liquid storage tank 24 is configured to collect the liquid thus generated, and includes an inlet 241, an outlet 243, and a collecting port 245 for allowing the inert gas and the liquid to pass. The outlet 243 is for the inertia. The gas is discharged, the collection 245 allows the liquid to be removed from the liquid reservoir 24 and collected. It is noted that the inlet 241 is connected to the high temperature side 221 of the heat exchanger 22, and the outlet 243 is via the outlet A gas purifier 26 for purifying the inert gas is connected to the low temperature side 223 of the heat exchanger 22.

The gas circulation device 36 is configured to transport the inert gas purified by the gas purification device 26 back to the heating chamber 20, wherein the gas circulation device 36 is disposed between the heat exchanger 22 and the heating chamber 20, The purified inert gas is sent to the gas circulation device 36 by the gas purification device 26 via the heat exchanger 22 and the cooling device 30.

Further detailed below is a method for increasing the carbon content and calorific value of a carbonaceous material.

The method comprises: pumping the internal air of the heating chamber 20 to a pressure of 0.1 atm or less (for example, 0.01 to 0.1 atm), and introducing an inert gas to the heating chamber to bring the pressure to 1 to 5 atm (for example, 1~1.2atm, 1~1.5atm, 1~2atm, 1~3atm and 1~4atm), and heating the heating chamber 20 to remove moisture and volatile substances from the carbonaceous material to enhance carbon content the amount.

Again, the heating step is carried out continuously under three or more different temperature conditions, and each temperature state is maintained for a period of time such that the carbon content of the carbonaceous material after treatment is compared with that before treatment. It is a 20% increase or more, and preferably, the weight percentage of the carbon content is increased by 25% or more.

The heating step is typically controlled to ramp at a rate of 5 to 30 ° C/min (eg, 5 ° C/min, 10 ° C/min, 15 ° C/min, and 20 ° C/min).

By maintaining the heating rate, for example, 5 ° C / min, the heating step can sequentially reach a first temperature state, a second temperature state, and a third temperature state, etc., it should be noted that for the three or In each of the above temperature states, the one or more temperatures are maintained for a predetermined period of time, and if there are two or more temperature values in a temperature state, each temperature value can remain the same in the temperature state. The time, for example, the first temperature state is maintained at 230 ° C for 40 minutes, the second temperature state is maintained at 280 ° C, 350 ° C and 400 ° C for 30 minutes each, the third temperature state is at 550 °C is maintained for 60 minutes.

The carbonaceous material may be coal. In this case, the heating step comprises continuously maintaining the temperature between 200 and 240 ° C for 35 to 45 minutes, maintaining the temperature between 260 and 300 ° C, and 320 to 360 ° C. Between 380 and 420 ° C for 25 to 35 minutes, and maintain the temperature between 550 and 900 ° C (for example, between 550 and 650 ° C, and between 600 and 700 ° C) for 30 to 90 minutes, for example When the temperature is controlled at a rate of 5 ° C / min, the heating step comprises continuously maintaining the temperature between 230 ° C for 40 minutes, maintaining the temperature between 280 ° C, 350 ° C and 400 ° C for 30 minutes each. And maintaining the temperature at 550 ° C for 60 minutes, for example, when the temperature is controlled at a rate of 5 ° C / min, the heating step comprises continuously maintaining the temperature between 230 ° C for 40 minutes, maintaining the temperature at 280 ° C, Each of 350 ° C, 400 ° C, and 550 ° C was continued for 30 minutes, and the temperature was maintained at 650 ° C for 60 minutes.

The carbonaceous material may also be a carbon-containing lignin waste material selected from the group consisting of waste wood, waste wood, wood particles, wood brick, palm shell and coconut shell, except that, in this case, The heating step comprises continuously maintaining the temperature between 160 and 240 ° C for 25 to 35 minutes, maintaining the temperature between 260 and 300 ° C and between 320 and 420 ° C for 45 to 60 minutes, and maintaining the temperature at 360. Between ~500 ° C for 25 to 60 minutes, for example, when the temperature is controlled at a rate of 5 ° C / min, the heating step comprises continuously maintaining the temperature at 180 ° C and 230 ° C for 30 minutes each, maintaining the temperature at 280 °C and 330 °C each lasted 60 minutes, and the temperature was maintained at 380 ° C for 30 minutes.

The inert gas may be nitrogen, argon or helium and is typically introduced into the heating chamber 20 such that the pressure reaches 1 to 1.5 atm.

The foregoing method can be implemented in two stages using the system disclosed in Fig. 1, namely (a) stage and (b) stage.

The stage (a) includes charging a carbonaceous material into the heating chamber 20, evacuating the internal air of the heating chamber 20, and directing an inert gas to the heating chamber 20.

In more detail, stage (a) consists of three steps, such as steps (a1) to (a3):

In step (a1), valve D is opened to allow the carbonaceous material to enter the heating chamber 20 from the feeder 32 via the material inlet 205.

In the step (a2), the valves B, C, D, E, F are closed, and the valve A is opened, and the heating chamber 20 is internally air is removed by the vacuum pump 40, so that The pressure reaches 0.1 atm or less (for example, 0.01 to 0.1 atm).

In the step (a3), the valve A is closed and the valves B, C are opened, so that the inert gas flows from the gas reservoir 42 into the heating chamber 20 until the internal pressure of the heating chamber 20 is equal to or higher than Atmospheric pressure is balanced.

The stage (b) includes heating the carbonaceous material loaded in the heating chamber 20 at a predetermined heating rate, and continuously performing at three or more different temperature conditions, and each temperature state is maintained for a period of time. Cooling and collecting the treated carbonaceous material, and purifying the inert gas and circulating it.

In more detail, stage (b) consists of four steps, such as steps (b1) to (b4):

In the step (b1), the carbonaceous material is heated by the heating device 202. Importantly, the maintenance of the temperature value, the heating rate, and the temperature is controlled in this step, for example, using software to control The temperature of the heating chamber is raised from room temperature to a first temperature state (for example, 200 to 240 ° C) and maintained for a period of time (for example, 35 to 45 minutes), and then the temperature of the heating chamber 20 is raised to a first The temperature state (for example, 260 to 420 ° C) is also maintained for a period of time (for example, 25 to 35 minutes), and finally, the temperature of the heating chamber 20 is raised to a third temperature state (for example, 550 to 900 ° C). And for a further period of time (for example, 30 to 90 minutes), it should be noted that the temperature of the heating chamber 20 is not limited to those disclosed in the examples, and depending on the type of the carbonaceous material, The temperature is also controlled to a different range depending on the demand, and the heating step can be maintained for a different period of time during the operation, or three or more different temperature states can be used as described above.

When the carbonaceous material is heated to the first temperature state, the water is gradually vaporized into water vapor, and when the temperature of the heating chamber 20 is raised to the second temperature state, the molecular weight is lower. The substance, nitrogen component and sulfur are also gradually vaporized. Finally, when the temperature of the heating chamber 20 is raised to the third temperature state, the covalent bond between some carbon atoms is also cut off, and the boiling point is higher. By-products are also vaporized and separated from the carbonaceous material, such as coal tar or hibiscus.

In the step (b2), the treated carbonaceous material is transferred to the material reservoir 34 via the high temperature side 301 surrounded by the low temperature side 303 of the cooling device 30.

In the step (b3), the gas generated in the step (b1) enters the high temperature side 221 of the heat exchanger 22, and is cooled by contacting the low temperature side 223 to be converted into a liquid to be separated from the inert gas. The gas generated will be introduced into the liquid storage tank 24 along with the inert gas, as a result of which the liquid will be condensed via the heat exchanger 22, and separated from the inert gas, the formed liquid and the inert gas. Both are introduced into the liquid reservoir 24 via the inlet 24, the liquid is collected via the collection port 245, and the flowing inert gas is introduced into the gas purifier 26 via the outlet 243 for purification.

In the step (b4), the inert gas leaving the liquid storage tank 24 will be purified and sent to the heating chamber 20 again. After entering the gas purifier 26, the inert gas will be activated by its internal activated carbon. Further purified, after which the purified inert gas will be passed through the low temperature side 223 of the heat exchanger 22 and the low temperature side 303 of the cooling device 30, as well as via a line 28 and a gas return device 36. Returning to the heating chamber 20, the gas circulation device is configured to transport the purified inert gas back to the heating chamber 20. The heat value released by the carbonaceous material during cooling can also be used as the preheating of the inert gas. .

It should be particularly noted that the heating chamber 20 is typically maintained at the same or slightly higher than atmospheric pressure during the (b) phase, and the heating chamber 20 can be maintained in communication with the connected pipeline during operation. In this way, the untreated carbonaceous material and the treated carbonaceous material can be more easily transported, and the inert gas can be easily flowed in the system, and the operating cost can be greatly reduced.

Furthermore, the method of the present invention heats the heating chamber 20 in three or more different temperature states, and the by-products of different boiling points can be separated in different heating stages, and sequentially collected in the liquid storage tank 24, compared with the conventional one. By this method, this method can obtain a higher degree of purification by-product.

In one embodiment of the method, the carbonaceous material is sub-bituminous coal or lignite, the inert gas is nitrogen or argon, and in the step of being introduced into the heating chamber, the pressure is brought to 1~1.5 atm, The heating step is controlled to be heated at a rate of 5 to 30 ° C / min, and the heating step comprises continuously maintaining the temperature between 200 and 240 ° C for 35 to 45 minutes, maintaining the temperature between 260 and 300 ° C, Between 320~360°C and 380~420°C, each lasts for 25~35 minutes, and the temperature is maintained between 550~900°C for 30~90 minutes.

In this embodiment, the carbonaceous material has a carbon content of 50 wt% or less before treatment, 0.9 wt% or more of sulfur, and a calorific value of 5500 Kcal/Kg or less, and the method can produce Unexpected effect. Further, the carbonaceous material has a carbon content of 70 wt% or more after treatment, a sulfur content of 0.4 wt% or less, and a heat value of 7000 Kcal/Kg or more.

Based on the above description, those skilled in the art can use the technology of the present invention to the fullest extent without further details. Therefore, the following examples are merely illustrative, not The invention is limited in any way.

Example 1: Procedure for increasing the carbon content and calorific value of sub-bituminous coal

With a vacuum pump, the air in the heating chamber containing 8 Kg of sub-bituminous coal is removed to make the pressure reach 0.1 atm or less, and the pressure is equal to or slightly higher than 1 atm by introducing nitrogen gas. The heating chamber 20 is heated by a heating furnace. In the state of gas flow, the temperature is raised at a rate of 5 ° C per minute. The furnace is controlled to heat the heating chamber 20, and the temperature is raised from room temperature to 230 ° C, the temperature is maintained for 40 minutes, and then divided into three stages. The temperature is sequentially raised to 280 ° C, 350 ° C and 400 ° C, each maintaining temperature for 30 minutes, and then the temperature is further increased to 550 ° C, maintaining the temperature for 1 hour, and then the treated sub-bituminous coal will be cooled in an inert gas flow state. To room temperature.

The obtained material will be weighed and the measured weight loss ratio is 30%. The analysis data before and after the treatment are shown in Table 1 below. This test and analysis is carried out by Taiwan SGS Company. It should be noted that the analysis of the SGS is carried out in accordance with the agreement of the American Society for Testing and Materials. For example, the calorific value, ash content and sulfur content are According to ASTM D5865, ASTM D3174 and ASTM D4239, the total moisture analysis is carried out in accordance with ASTM D3302 and ASTM D3173. The following two and third embodiments are also the same. Table 1. Analytical data before and after treatment of sub-bituminous coal  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><u>Coal</u></td><td><u>Before Processing Sub-bituminous coal</u><u>^a</u></td><td><u>sub-bituminous coal after treatment</u><u><sup>b</sup ></u></td></tr><tr><td> calorific value (Kcal/Kg) </td><td> 5000 </td><td> AD:6932;DB:7091 </ Td></tr><tr><td> total water (wt%) </td><td> 28 </td><td> 2.24 AD </td></tr><tr><td> Ash (wt%) </td><td> 8 </td><td> 10.26 AD </td></tr><tr><td> sulfur (wt%) </td><td> 0.9 </td><td> 0.37 AD </td></tr><tr><td> carbon content (wt%) </td><td> 45.9 </td><td> 74.5 AD </ Td></tr></TBODY></TABLE> Note a: Data from Taiwan Power Company Note b: AD refers to the heat value of the air drying basis, which is also the raw material or fuel of the carbonaceous material. The product is placed in the air, the measured heat is measured after the air humidity is balanced and dried, and DB is the calorific value on the dried basis, that is, the calorific value when it is completely anhydrous.  

The treated sub-bituminous coal exhibits unpredictable high calorific value, high carbon content and low sulfur content before treatment. In detail, the calorific value of the treated sub-bituminous coal is 6932 kcal/kg (AD) and 7091. Kcal/kg (DB), which was actually only 5000 kcal/kg before treatment, while the water content decreased from 28 wt% to 2.24 wt% (AD), and sulfur decreased from 0.9 wt% to 0.37 wt% (AD). The carbon content increased from 45.9 wt% to 74.5 wt% (AD).

In particular, this procedure has greatly improved the carbon content and calorific value of the sub-bituminous coal.

Example 2: Procedure for increasing the carbon content and calorific value of lignite

With a vacuum pump, the air in the heating chamber containing 8 Kg of lignite is removed to make the pressure below 0.1 atm, and the pressure is equal to or slightly higher than 1 atm by introducing nitrogen gas. The heating chamber 20 is heated by a heating furnace. In the state of flowing, the temperature is raised at a rate of 5 ° C per minute. The heating furnace is controlled to heat the heating chamber 20, and the temperature is raised from room temperature to 230 ° C, the temperature is maintained for 40 minutes, and then the temperature is sequentially increased to 280 ° C, 350 ° C, 400 ° C and 550 ° C, each maintaining temperature for 30 minutes, and finally continue to raise the temperature to 650 ° C, maintaining the temperature for 1 hour, then, the treated sub-bituminous coal will be cooled to a state with inert gas flow to Room temperature.

The obtained material will be weighed and the measured weight loss ratio is 35%. The analysis data before and after the treatment are shown in Table 1 below. Table 2, analysis data before and after lignite treatment  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><u>Coal</u></td><td><u>Before Processing Lignite</u><u>^a</u></td><td><u>treated brown coal</u><u>^b< /u></td></tr><tr><td> calorific value (Kcal/Kg) </td><td> 4500 </td><td> AD:7056;DB:7606 </td> </tr><tr><td> total moisture (wt%) </td><td> 29.3 </td><td> 1.32 AD </td></tr><tr><td> ash (wt%) </td><td> 1.9 </td><td> 8.26 AD </td></tr><tr><td> sulfur (wt%) </td><td> 1.2 < /td><td> 0.34 AD </td></tr><tr><td> carbon content (wt%) </td><td> 33.0 </td><td> 81.4 AD </td> </tr></TBODY></TABLE>Note a: Data from Taiwan Power Company Note b: Analyzed by SGS, where AD refers to the heat value of the dry air base, and DB refers to the heat of the dry base. value.  

The treated lignite has an unpredictable high calorific value, high carbon content and low sulfur content before treatment. In detail, the calcined calcinous coal has a calorific value of 7506 kcal/kg (AD) and 7606 kcal/ Kg(DB), which was actually only 4500 kcal/kg before treatment, while the water content decreased from 29.3 wt% to 1.32 wt% (AD), and sulfur decreased from 1.2 wt% to 0.34 wt% (AD), with carbon The amount was increased from 33.0 wt% to 81.4 wt% (AD).

In particular, this procedure has greatly improved the carbon content and calorific value of the sub-bituminous coal.

Example 3: Procedure for increasing the carbon content and calorific value of wood pellets

With a vacuum pump, the air in the heating chamber containing 8 Kg of wood particles is removed to make the pressure below 0.1 atm, and the pressure is equal to or slightly higher than 1 atm by introducing nitrogen gas. The heating chamber 20 is heated by a heating furnace. In the state of gas flow, the temperature is raised at a rate of 5 ° C per minute. The furnace is controlled to heat the heating chamber 20, and the temperature is raised from room temperature to 180 ° C, the temperature is maintained for 30 minutes, and then the temperature is raised to 230 ° C. , maintaining the temperature for 30 minutes, and then heating to 280 ° C and 330 ° C, each maintaining temperature for 60 minutes, and finally continue to raise the temperature to 380 ° C, maintaining the temperature for 1 hour, then, the treated wood particles will be in a state of inert gas flow Cool down to room temperature.

The obtained material will be weighed and the measured weight loss ratio is 30%. The analysis data before and after the treatment are shown in Table 3 below. Table 3. Analytical data before and after treatment of wood particles  <TABLE border="1" borderColor="#000000" width="85%"><TBODY><tr><td><u>Coal</u></td><td><u>Before Processing Wood particles</u><u>^a</u></td><td><u>treated wood particles</u><sup>b</sup ></u></td></tr><tr><td> calorific value (Kcal/Kg) </td><td> 4800 </td><td> AD:7010;DB:7397 </ Td></tr><tr><td> total moisture (wt%) </td><td> unmeasured</td><td> 5.23 AD </td></tr><tr>< Td> ash (wt%) </td><td> unmeasured</td><td> 2.15 AD </td></tr><tr><td> sulfur (wt%) </td ><td> Unmeasured</td><td> 0.02 AD </td></tr><tr><td> Carbon content (wt%) </td><td> Unmeasured</td ><td> 77.1 AD </td></tr></TBODY></TABLE>Note a: Data from Chunfa Technology Co., Ltd. Note b: Analyzed by SGS, where AD refers to dry air The calorific value, while DB refers to the calorific value of the drying base.  

The treated wood particles exhibited unpredictable high calorific value, high carbon content and low sulfur content before treatment. In detail, the heat value of the treated wood particles was 7010 kcal/kg (AD) and 7397. Kcal/kg (DB), which is actually only 4800 kcal/kg before treatment. In addition, the treated wood particles not only have a high carbon content of 77.1 wt% (AD), but also a relatively low sulfur content of 0.02 wt%. (AD).

This result shows that this method can greatly increase the carbon content and calorific value of the wood particles.

All of the features disclosed in this specification can be combined on any composition, and each feature disclosed in the present specification can be replaced by an alternative feature of the same effect, equal or similar purpose, and thus unless specifically Note that otherwise each of the disclosed features is only one of a series of equivalent or similar features.

The above is only a preferred embodiment of the present invention, and equivalent changes to the scope of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

[this invention]

10‧‧‧System for increasing the carbon content of carbonaceous materials

20‧‧‧heating chamber

201‧‧‧heating room

202‧‧‧ heating device

203‧‧‧ gas inlet

204‧‧‧ gas export

205‧‧‧Material entrance

206‧‧‧Material exports

22‧‧‧ heat exchanger

221‧‧‧High temperature side

223‧‧‧low temperature side

24‧‧‧Liquid storage tank

241‧‧‧ entrance

243‧‧‧Export

245‧‧ ‧ collection port

26‧‧‧Gas Purifier

28‧‧‧pipes

30‧‧‧Cooling device

301‧‧‧High temperature side

303‧‧‧low temperature side

32‧‧‧ feeder

34‧‧‧Material storage tank

36‧‧‧ gas circulation device

38‧‧‧ pressure gauge

40‧‧‧vacuum pump

42‧‧‧ gas storage tank

A, B, C, D, E, F‧‧‧ valves

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a configuration diagram of a system for increasing the carbon content of a carbonaceous material according to the present invention.

Claims (25)

A method for increasing the carbon content of a carbonaceous material comprises: charging a predetermined amount of a carbonaceous material into a heating chamber; withdrawing the internal air of the heating chamber to a pressure of 0.1 atm or less; and introducing an inert gas Up to the heating chamber, the pressure reaches 1~5atm; heating the heating chamber to remove moisture and volatile substances from the carbonaceous material to increase the carbon content; and cooling and collecting the treated carbonaceous material Wherein, the heating step increases the carbon content of the carbonaceous material after treatment by 20% or more compared to that before the treatment. A method for increasing the carbon content of a carbonaceous material as described in claim 1, wherein the carbonaceous material is coal. A method for increasing the carbon content of a carbonaceous material as described in claim 2, wherein the coal is sub-bituminous coal or lignite. The method for increasing the carbon content of a carbonaceous material according to claim 1, wherein the carbonaceous material is a carbonaceous lignin waste material. The method for increasing the carbon content of a carbonaceous material according to claim 4, wherein the carbon-containing lignin waste material is selected from the group consisting of waste wood, waste wood, wood particles, wood brick, palm shell and coconut shell. Group. A method of increasing the carbon content of a carbonaceous material as described in claim 1, wherein the carbonaceous material is rubber tire particles. A method of increasing the carbon content of a carbonaceous material as described in claim 1, wherein the inert gas is nitrogen or argon. A method for increasing the carbon content of a carbonaceous material as described in claim 1, wherein the step of introducing the inert gas into the heating chamber causes the pressure to reach 1 to 1.5 atm. The method for increasing the carbon content of a carbonaceous material according to claim 1, wherein the heating step is controlled to increase the temperature at a rate of 5 to 30 ° C/min. The method for increasing the carbon content of a carbonaceous material according to claim 9, wherein the carbonaceous material is sub-bituminous coal or lignite. The method for increasing the carbon content of a carbonaceous material according to claim 10, wherein the heating step is continuously maintaining the temperature between 200 and 240 ° C for 35 to 45 minutes, maintaining the temperature between 260 and 300 ° C, 320 Between ~360 ° C and 380 ~ 420 ° C for 25 to 35 minutes, and maintain the temperature between 550 ~ 900 ° C for 30 to 90 minutes. The method for increasing the carbon content of a carbonaceous material according to claim 9, wherein the carbonaceous material is a carbonaceous lignin waste material selected from the group consisting of waste wood, waste wood, wood particles, wood bricks, palm shells, and A group of coconut shells. The method for increasing the carbon content of a carbonaceous material according to claim 12, wherein the heating step is continuously maintaining the temperature between 160 and 240 ° C for 25 to 35 minutes, maintaining the temperature between 260 and 300 ° C and 320 The temperature between ~340 °C lasts for 45 to 60 minutes, and the temperature is maintained between 360 and 500 °C for 25 to 60 minutes. The method for increasing the carbon content of a carbonaceous material according to claim 9, wherein the inert gas is nitrogen, helium or argon, and in the step of being introduced into the heating chamber, the pressure is brought to 1 to 1.5. Atm. The method of claim 1, wherein the carbonaceous material is sub-bituminous coal or lignite, and the heating step comprises continuously maintaining the temperature between 200 and 240 ° C for 35 to 45 minutes. , maintain the temperature between 260 ~ 300 ° C, 320 ~ 360 Between °C and 380~420 °C for 25~35 minutes, and maintain the temperature between 550~900 °C for 30~90 minutes. The method for increasing the carbon content of a carbonaceous material according to claim 14, wherein the carbonaceous material is a carbonaceous lignin waste material selected from the group consisting of waste wood, waste wood, wood particles, wood bricks, palm shells, and a group consisting of coconut shells, and the heating step comprises continuously maintaining the temperature between 160 and 240 ° C for 25 to 35 minutes, maintaining the temperature between 260 and 300 ° C and between 320 and 340 ° C for 45 ° each. 60 minutes, and maintain the temperature between 360 ~ 500 ° C for 25 to 60 minutes. The method for increasing the carbon content of a carbonaceous material according to claim 1, wherein the carbonaceous material is sub-bituminous coal or lignite, the inert gas is nitrogen or argon, and in the step of being introduced into the heating chamber, The pressure reaches 1~1.5atm, the heating step is controlled to increase the temperature at 5~30°C/min, and the heating step comprises continuously maintaining the temperature between 200~240°C for 35~45 minutes, maintaining the temperature. Between 260~300°C, 320~360°C and 380~420°C for 25~35 minutes, and maintain the temperature between 550~900°C for 30~90 minutes. The method for increasing the carbon content of a carbonaceous material according to claim 1, wherein the carbonaceous material has a carbon content by weight increase of 25% or more after the treatment. The method for increasing the carbon content of a carbonaceous material according to claim 1, wherein the carbonaceous material has a carbon content of 50 wt% or less before treatment, a sulfur content of 0.9 wt% or more, and a calorific value of 5500 Kcal. /Kg or less; and the carbonaceous material has a carbon content of 70% by weight or more after the treatment, a sulfur content of 0.4% by weight or less, and a heat value of 7,000 Kcal/Kg or more. The method for increasing the carbon content of a carbonaceous material according to claim 17, wherein the carbonaceous material has a carbon content of 50 wt% or less before treatment, a sulfur content of 0.9 wt% or more, and a calorific value of 5500 Kcal. /Kg or less; and the carbonaceous material has a carbon content of 70% by weight or more after the treatment, a sulfur content of 0.4% by weight or less, and a heat value of 7,000 Kcal/Kg or more. A system for increasing the carbon content of a carbonaceous material, comprising: a heating chamber comprising a heating device, a material inlet, a material outlet, a gas inlet, and a gas outlet, wherein the heating device is for heating the heating chamber; a feeder connected to the material inlet for receiving a carbonaceous material to be transported to the heating chamber via the material inlet; a cooling device for cooling from the heating chamber through the material outlet a carbonaceous material for transport to a material reservoir for receiving the carbonaceous material; a vacuum pump for withdrawing internal air from the heating chamber, the vacuum pump being connected to the gas inlet; a gas storage tank for supplying the inert gas, wherein the gas storage tank is also connected to the gas inlet; a heat exchanger for separating a liquid from the inert gas, the heat exchanger being disposed at the gas outlet And a liquid storage tank for receiving the liquid; and a pressure gauge for measuring the internal pressure of the heating chamber; wherein the vacuum pump first evacuates the internal air of the heating chamber Pressure reaches 0.1atm or less, the gas reservoir and then supplies the inert gas to the heating chamber, the heating means and then starting the heating of the heating chamber. A system for increasing the carbon content of a carbonaceous material as described in claim 21, wherein the heating means is for raising the temperature of the heating chamber at a rate of 5 to 30 ° C/min. A system for increasing the carbon content of a carbonaceous material as described in claim 21, wherein the liquid storage tank has an inlet and an outlet, the inlet being connected to the heat exchanger for allowing the inert gas and the liquid to pass. The outlet is connected to a gas purifier for passage of the liquid, and the inert gas is purified by the gas purifier. The system for increasing the carbon content of a carbonaceous material according to claim 23, further comprising a gas circulation device for conveying the inert gas purified by the gas purification device back to the heating chamber, wherein the gas circulation device And being disposed between the cooling device and the heating chamber, and the purified inert gas is sent to the gas circulation device by the gas purification device via the heat exchanger and the cooling device. A system for increasing the carbon content of a carbonaceous material as described in claim 24, wherein the heating means is for raising the temperature of the heating chamber at a rate of 5 to 30 ° C/min.