阅读说明：本技术 棕榈树空果串制造水煤气的方法 (Method for producing water gas from empty fruit bunch of palm tree ) 是由 萧明尧 于 2020-11-26 设计创作，主要内容包括：本发明公开了棕榈树空果串制造水煤气的方法,釆用棕榈油挤压后的空果串废弃物为原料,通过250℃-420℃干燥脱水的物理化学反应转化形成棕榈生物碳,然后将碳基质置于水煤气发生器,转化成水煤气燃料。本发明其制备方法简单,棕榈生物碳转化水煤气转化率高,得到的水煤气低污染、高热能。本发明为棕榈油加工废料的处理再利用提供一种新方法,并可作为生产水煤气的不可再生能源煤炭的有效替代物。(The invention discloses a method for producing water gas from empty fruit bunches of palm trees, which comprises the steps of taking empty fruit bunches waste extruded by palm oil as a raw material, converting the empty fruit bunches into palm biochar through a physicochemical reaction of drying and dehydration at a temperature of between 250 and 420 ℃, and then placing a carbon substrate in a water-gas generator to convert the carbon substrate into water gas fuel. The preparation method is simple, the conversion rate of water gas converted from palm biochar is high, and the obtained water gas is low in pollution and high in heat energy. The invention provides a new method for treating and recycling palm oil processing waste, and can be used as an effective substitute for non-renewable energy coal for producing water gas.)

1. A method for producing water gas by palm empty fruit clusters is characterized by comprising the following steps:

1) fire-proof smoldering carbonization of empty fruit bunch of palm

The palm empty fruit bunch is subjected to smoldering carbonization in a sealed environment to obtain carbon-based fibers;

2) carbon-based fiber pretreatment

Crushing the carbon-based fibers obtained in the step 1) to obtain carbon-based fiber powder;

3) preparation of water gas

Feeding the carbon-based fiber powder obtained in the step 2) into a gas producer for water gas reaction, and collecting water gas.

2. The method for producing water gas from palm empty fruit bunches according to claim 1, wherein in step 1), the palm empty fruit bunches are cut into 2mm-80mm particles.

3. The method for producing water gas from the empty palm fruit bunch according to claim 1 or 2, wherein in the step 1), the smoldering temperature is 250-420 ℃, and more than 90% of the carbon-based fibers are carbonized.

4. The method for producing water gas from palm empty fruit bunches according to claim 1, wherein the particle size of the carbon-based fiber powder in step 2) is 2mm-60 mm.

5. The method for producing water gas from palm empty fruit clusters as claimed in claim 1, wherein the gas producer in the step 3) is a single/double-section gas producer or an atmospheric fixed bed gas producer.

6. The method for producing water gas from palm empty fruit bunches according to claim 1, wherein the carbon-based fiber powder in step 3) is dried at 150 ℃ to 200 ℃ for 1 to 6 hours before being fed into a gas generator, and then preheated at 150 ℃ for 1 to 2 hours.

Technical Field

The invention belongs to the technical field of water gas preparation, and particularly relates to a method for preparing water gas from palm empty fruit clusters.

Background

The production of palm oil is an important industry, where the fruit is separated from the stem after the palm has ripened, leaving Empty Fruit Bunches (EFBs) as a waste material. Many millions of tons of EFB are produced each year. Most of the EFB is treated by burning ash as fertilizer for plants, but the burning brings great environmental pollution. Since various raw biofuels are not easily used for long-term storage and are very easily degraded. They have a relatively low energy density and are therefore also very uneconomical to transport over long distances. Although boilers have made some progress in heat energy utilization, the overall energy utilization is still low. Therefore, energy is obtained from the biomass in other forms so as to improve the utilization rate of the energy and meet the requirement of long-distance energy supply and storage.

The water gas is a gas generated by passing water vapor through hot coke, and mainly contains carbon monoxide and hydrogen, and water and carbon dioxide are discharged after combustion. In the traditional method, anthracite is used as a carbon raw material, a large amount of sulfur dioxide and hydrogen sulfide gas exist in produced water gas, the damage to production environment and equipment is serious, and meanwhile, coal is used as a non-renewable energy source, so that the development and utilization of the coal are limited. The biomass carbon of empty fruit bunches of palm trees has the advantages of being renewable, low in pollution (the sulfur content is as low as 0.033), good in combustion benefit and the like, is widely applied to multiple fields, and is particularly suitable for being converted into water gas. At present, no report of using the empty fruit bunches of the palm trees to manufacture water gas exists, and the development and the utilization of the empty fruit bunches of the palm trees, which are waste materials in the palm industry, have wide prospects.

Disclosure of Invention

The invention aims to provide a method for manufacturing water gas by utilizing empty fruit bunches of palm trees, which fully utilizes the waste materials of the empty fruit bunches generated in the production process of palm oil, obtains high yield and heat value of the water gas and has clean production process.

The method for producing water gas by using empty fruit bunches of palm trees comprises the following steps:

1) fire-proof smoldering carbonization of empty fruit bunch of palm

The palm empty fruit bunch is subjected to smoldering carbonization in a sealed environment to obtain carbon-based fibers;

2) carbon-based fiber pretreatment

Crushing the carbon-based fibers obtained in the step 1) to obtain carbon-based fiber powder;

3) preparation of water gas

Feeding the carbon-based fiber powder obtained in the step 2) into a gas producer for water gas reaction, and collecting water gas.

The empty palm fruit bunch in the step 1) is cut into particles of 2mm-80 mm.

In the step 1), the intermediate fire smoldering temperature is 250-420 ℃, and more than 90% of the carbon-based fibers are carbonized.

The particle size of the carbon-based fiber powder in the step 2) is 2-60 mm.

The coal gas producer in the step 3) adopts a single/double-section coal gas producer or a normal-pressure fixed bed coal gas producer.

The carbon-based fiber powder in the step 3) is dried for 1 to 6 hours at the temperature of between 150 and 200 ℃ before being fed into a gas generator, and then is preheated for 1 to 2 hours at the temperature of between 150 ℃.

The method has the beneficial effects that empty fruit bunch waste after palm oil extrusion is used as a raw material, palm biochar is formed after drying and dehydration at the temperature of 250-420 ℃, then a carbon substrate is placed in a water gas generator and is converted into water gas fuel, the preparation method is simple, and the conversion rate of the palm biochar into water gas is high. The biomass carbon sulfur content of the empty fruit bunches of palm trees prepared by the invention is as low as 0.033%, and the empty fruit bunches of palm trees have the advantages of low pollution, good combustion benefit, renewability and the like, and are particularly suitable for being converted into water gas. The invention provides a new method for treating and recycling palm oil processing waste materials, and can be used as an effective substitution method for non-renewable energy coal for producing water gas.

Detailed Description

The present invention will be described in further detail with reference to examples, but the present invention is not limited to these examples.

Example 1

The method for producing water gas by using palm empty fruit clusters comprises the following steps:

1) fire-proof smoldering carbonization of empty fruit bunch of palm

Cutting 50kg-5000kg palm empty fruit into 2mm-80mm granules, smoldering and carbonizing for 20 minutes-24 hours at 250 ℃ -420 ℃ in a closed environment without fire, checking by using a carbonization depth tester, stopping heating when 90% of carbon-based fibers are carbonized, and taking out the carbon-based fibers after cooling.

The applicant carried out a test on the carbon-based fiber sample obtained in step 1) (sample number KI/2020/80435, test unit: taiwan inspection science ltd), the results are shown in table 1, and the sulfur content is as low as 0.033% without sulfur contamination.

2) Carbon-based fiber pretreatment

Crushing the carbon-based fibers obtained in the step 1) into carbon-based fiber powder with the particle size of 2-60 mm by using a ball mill or a high-speed crusher;

3) preparation of water gas

Drying the carbon-based fiber powder obtained in the step) 2 at the temperature of 150-200 ℃ for 1-6 hours, preheating at the temperature of 150 ℃ for 1-2 hours, feeding into a gas generator for water gas reaction, and collecting water gas.

The coal gas producer adopts a single/double-section coal gas producer or a normal-pressure fixed bed coal gas producer, the diameter of a feeding port is 80mm-160mm, and the operation is carried out conventionally according to the use instruction of the coal gas producer.

The main chemical reaction formulas in the gas producer are shown as formulas 1) to 3):

1)CO+C＝2CO

2)H₂O+C＝H₂+CO

3)2H₂O+C＝CO₂+2H₂。

the gas production in the water gas reaction process is 65-68 percent, and the rest is blast gas. The components and contents of the obtained water gas are shown in the following table 2, and the heating value is 10984 kJ/m³. CO + H contained in the discharged blast gas₂About 10.92 percent, and the calorific value is about 1530 kilojoules per meter³This heat was lost as heat, and the gasification efficiency of the water gas was 62.3%, and the thermal efficiency was 57%.

TABLE 1 carbon-based fiber detection table

Item	Unit of	Results
			Humidity	wt％	3.323
Combustible material	wt％	92.66
			Ash and ash	wt％	4.017
Gross calorific value	Kcal/Kg	5324
			Sulfur (S)	wt％	0.0330

Remarking: mg/kg-ppm; 0.1 wt% ═ 1000 ppm.

TABLE 2 Water gas composition Table

Composition (I)	CO2	H2S	O2	CO	H2	CH4	N2
								Content%	6.2	0.005	0.23	38.5	49.2	0.6	6.38

As can be seen from the results in tables 1 and 2, the biomass carbon produced from the palm empty fruit bunches of the present invention has low pollution (sulfur content as low as 0.033%) and high heat generated by combustion (5324Kcal/Kg), and the water gas H produced from the biomass carbon₂S content as low as 0.005%, CO + H₂The content is 87.7 percent, and the method has the advantages of low pollution, high water gas gasification efficiency and high heat efficiency. And the biomass carbon prepared from the palm empty fruit clusters is used for preparing the water gas, the production can be realized by using the existing gas producer in the market, the large-scale transformation of equipment is not needed, the investment is small, the income is high, and the palm empty fruit clusters can be popularized and utilized as effective substitutes for the traditional water gas coal. The method for producing water gas by using the palm empty fruit bunches has good market popularization value and social benefit.