KR102072590B1 - Furnace system for gasification melting of waste, and hydrogen generation method using the same - Google Patents

Abstract

Disclosed are a waste gasification melting system, capable of reducing emission of pollutants by fixing sulfur and chlorine components in a gasification melting furnace, and to a hydrogen generating method using the same. The waste gasification melting system of the present invention comprises: a gas furnace installed to occur a gasification reaction at high temperature; a waste supply device installed to supply waste to the gas furnace; a fixed chemical supply device installed to supply a desulfurizing and desalting agent to the gas furnace; at least one burner installed to heat waste and the desulfurizing and desalting agent into the gas furnace to increase an internal increase, supplying an oxidant, and melting the waste and the desulfurizing and desalting agent to form the same in a slag form; and a slag discharge device installed to discharge a slag generated in the gas furnace.

Description

FURNACE SYSTEM FOR GASIFICATION MELTING OF WASTE, AND HYDROGEN GENERATION METHOD USING THE SAME}

The present invention relates to a waste gasification system, and more particularly, to desulfurization and waste from waste by melting the waste introduced into the furnace while maintaining the gasifier at a constant temperature and constant temperature with a burner fed with pure oxygen, and supplying desalination and desulfurization agents. The present invention relates to a waste gasification furnace system incorporating in-gas gasification and melting, in which desalination is more actively generated and sulfur and salts are discharged to stabilized slag, and a method for producing hydrogen using the same.

In general, the reaction for converting flammable waste into energy can be classified into an incineration (combustion) technique for treating in an oxygen-rich atmosphere and a gasification technique for treating in an atmosphere of low oxygen.

In the gasification technology, gaseous agents such as air and oxygen are mixed with solid or liquid fuels alone or in combination with each other to operate at a high temperature, thereby obtaining a gaseous fuel having high thermal efficiency and easy handling. . Since the synthesis gas generated in the gasification process includes tar, sulfur compound components, hydrogen chloride components, etc., it is variously utilized after being discharged to the outside and further processed (for example, tar reforming process, desulfurization process, and desalination process). Can be.

In addition, the fixed-bed gasification technology of the gasification technology is made to dry and gasify the waste injected into the upper portion of the reactor while moving to the lower portion of the reactor by using gravity. Here, the fixed-bed gasification, for example, by using low-grade fuel, such as marine wastes and workplace wastes to produce a synthesis gas in a high temperature fixed bed gasification furnace, purifying the contaminants contained in the synthesis gas into a clean syngas, High purity hydrogen and carbon dioxide can be produced through purification and hydrogen conversion separation processes in clean syngas.

On the other hand, since the synthesis gas generated in the gasification process includes a tar, a sulfur compound component, a hydrogen chloride component, etc., further treatment with the synthesis gas (eg, a tar reforming process, a desulfurization process, a desalting process, etc.) is required. Since a separate processing device is required for such additional processing, the structure of the fixed bed gasifier may be complicated, and manufacturing costs may increase.

For example, wastes containing a large amount of salt or sulfur in raw materials, such as marine waste, industrial waste, and organic waste, contain large amounts of chlorine compounds and sulfur compounds in the gaseous gas produced through gasification. Such contaminants must go through a purification process to use clean syngas, and the purification process becomes large to purify pollutants with high concentrations, and in order to increase the purification efficiency, it is below ppm unit according to the synthesis gas use process. If it needs to be refined, it will be expensive. In addition, when the desalination / desulfurization in the furnace does not occur in the waste gasifier, the content of hydrogen chloride and sulfur compounds in the produced syngas is high, thereby increasing the treatment cost of the syngas purification plant. Therefore, as the concentration of pollutants such as hydrogen chloride in the synthesis gas is higher, the corrosion of the ducts of the connection line including the heat recovery device in the refinery is accelerated, so it is necessary to reduce the amount of pollutants in the furnace.

Republic of Korea Patent Registration 10-1466837 (2014.11.28.) Republic of Korea Patent Registration 10-1398191 (2014.05.27. Notification) Republic of Korea Patent Registration 10-1322369 (October 29, 2013) Republic of Korea Patent Registration 10-1559837 (August 13, 2015) Republic of Korea Patent Registration 10-1705094 (August 09, 2017.)

The present invention has been made to solve the above problems, while generating a synthesis gas from the waste, waste gasification melting system integrated with gasification and melting to melt the waste in the gasification furnace to be discharged to the slag and a method for producing hydrogen using the same The purpose is to provide.

In order to achieve the above object, the waste gasification melting system according to the present invention includes a gasification furnace installed to generate a gasification reaction at a high temperature; A waste supply device installed to supply waste to the gasifier; An immobilized chemical supply device installed to supply desulfurization and desalting agents to the gasifier; At least one burner installed to heat the waste, desulfurization and desalting agent in the gasifier to raise an internal temperature, supply an oxidizing agent, and melt and slag the waste, desulfurization and desalting agent; And it may include a slag discharge device installed to discharge the slag generated in the gasifier.

Here, the gasifier is formed in a "┴" shape, the inlet for the waste, desulfurization and desalting agent supplied from the waste supply device and the immobilized chemical supply device; The slag discharge port for discharging the slag to the slag discharge device and the waste heat discharge port for discharging the heat to the outside is formed in the gasifier, the inlet is formed on one side of the lower end of the gasifier, the slag discharge port is the gasifier It is formed on the other side of the bottom of the furnace, the waste heat outlet may be formed on the top of the gasifier.

The burner may include: a first burner disposed at one side of the gasifier and installed to heat waste, desulfurization, and desalting agent while raising an internal temperature of the gasifier; It may include a second burner installed to heat and melt the waste, desulfurization and desalting agent passed through the first burner to the other side of the gasifier.

In addition, the burner may be installed on the upper part of the gasifier, and may further include a third burner for supplying an oxidant for reforming the syngas.

The present invention also provides a fuel supply device installed to supply fuel to the first burner; A pure oxygen supply device installed to supply pure oxygen to the first burner; And a control unit installed to maintain a constant internal temperature of the gasifier and to control the supply of oxidant, waste and desulfurization and desalting agent.

In addition, the present invention provides a fuel flow rate control device installed to control the fuel flow rate of the fuel supply device; A pure oxygen flow rate control device installed to control the pure oxygen flow rate of the pure oxygen supply device; And, it may further include a syngas measuring device for measuring the components of the syngas discharged from the gasifier.

The present invention also includes a heat recovery device installed to recover the sensible heat of the synthesis gas discharged from the gasifier; A dust filter collector installed to collect dust from the syngas discharged from the heat recovery device; It may further include a purification device installed to purify the synthesis gas discharged from the dust filter bag.

The refining apparatus includes: a wet refining apparatus installed to desulfurize and demineralize syngas discharged from the dust filter dust collector, and to remove water; It may include an advanced purification device installed to purify the synthesis gas discharged from the wet purification device.

In addition, the invention is a hydrogen conversion device installed to convert carbon monoxide in the synthesis gas discharged from the purification device into hydrogen; The apparatus may further include a gas separation and recovery device installed to extract carbon dioxide from the gas discharged from the hydrogen conversion device.

Here, the desulfurization and desalting agent may be composed of alkaline earth metals including limestone, dolomite, or slaked lime which are supplied without firing.

In addition, the present invention for achieving the above object is a hydrogen generation method using a waste gasification melting system in which waste, desulfurization and desalting agent is put into the gasifier, desulfurization and desalination reaction is carried out to convert the generated synthesis gas to hydrogen. In the supply step (S10) for supplying waste and desulfurization and desalting agent to the gasifier; A gas generating step (S20) of generating a synthesis gas by supplying an oxidant to the gasifier; A sensible heat recovery step (S30) for recovering sensible heat of the syngas discharged from the gasifier; A dust collecting step (S40) for collecting dust in the syngas; A purification step of purifying the syngas (S50, S60); A hydrogen conversion step of converting carbon monoxide in the synthesis gas into hydrogen (S70); And a carbon dioxide separation step (S90) for separating carbon dioxide from the synthesis gas.

Here, the gas generating step (S20), the step of generating a primary synthesis gas by supplying an oxidant while heating the waste and desulfurization and desalting agent injected into the gasifier with a first burner, and then moved waste and desulfurization and The desalting agent may be heated and melted again with the second burner to supply the oxidant again to generate a secondary synthesis gas.

In addition, the present invention is carried out between the gas generating step (S20) and the sensible heat recovery step (S30), the slag generated while the waste and desulfurization and desalting agent is melted in the gasifier to discharge the slag to the outside of the gasifier. It may further comprise a discharge step.

In another aspect, the present invention may further comprise the step of supplying an oxidant in the gasifier to reform the synthesis gas generated in the gas generating step (S20).

Here, the desulfurization and desalting agent supplied into the gasification furnace in the supplying step (S10) may be composed of alkaline earth metals including limestone, dolomite or slaked lime, which are supplied without a firing process.

In addition, the purification step, the step of wet purification of the synthesis gas (S50); It may comprise a step (S60) of highly purified wet purified syngas.

Waste gasification melting system according to the present invention by melting the waste while producing a synthesis gas in the gasifier and discharged in the form of slag, sulfur and chlorine components are fixed to the slag can reduce the processing cost of the desulfurization and desalination process of the synthesis gas. In addition, it can reduce the generation of secondary pollutants and reduce the cost of installing and operating air pollution control facilities.

In addition, the present invention simplifies the process by eliminating the desulfurization and desalting process previously performed by maintaining the temperature in the gasifier at a temperature higher than 1,000 ℃, thereby melting the alkaline earth metals supplied to the desulfurization and desalting agent Lower temperatures can reduce the energy consumption of the gasification process.

In addition, the present invention is to reduce the salt and sulfur by the second heating or melting in the gasifier for the waste containing a large amount of salt or sulfur such as marine waste or food waste, thereby reducing the synthesis gas discharged from the gasifier The burden on the post-treatment process can be significantly reduced.

The following drawings, which are attached in this specification, illustrate the embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be interpreted.
1 is a schematic view of a waste gasification melting system incorporating in-gas gasification and melting in accordance with one embodiment of the present invention;
2 is a schematic view of a waste gasification melting system incorporating in-gas gasification and melting in accordance with another embodiment of the present invention.
3 is a flow chart illustrating a process of generating hydrogen using the system of FIG.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the operation principle of the embodiment of the present invention in detail, when it is determined that the description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

1 is a view schematically showing a waste gasification melting system incorporating in-gas gasification and melting according to an embodiment of the present invention.

Referring to FIG. 1, a waste gasification melting system according to an embodiment of the present invention includes a gas generation device (GG) for generating a synthesis gas from a waste to be supplied and a purification apparatus for purifying the generated synthesis gas ( Gas Purify device; GP).

Synthesis gas generating apparatus (GG) is a gasifier 100 installed to generate a gasification reaction at a high temperature, a waste supply device 110, a fixed chemical supply device 120, at least one burner and slag discharge device 190 ) May be included.

The gasifier 100 is manufactured to maintain an internal temperature of about 1,180 ℃. The waste supply device 110 is installed to supply various wastes including marine wastes, workplace wastes, organic wastes, etc. to the gasifier 100. The waste contains a large amount of salt or sulfur. Therefore, when syngas is generated from this waste, the amount of gas generated from chlorine compounds such as hydrogen chloride and sulfur compounds such as hydrogen sulfide (H2S), carbon disulfide (CS2), and carbonyl sulfide (COS) is higher than that of general waste.

The immobilized chemical supply device 120 is installed to supply the immobilized chemical for desulfurization and desalination to the gasifier (100). Here, the immobilized chemicals for desulfurization and desalting (hereinafter, referred to as 'desulfurizing and desalting agents') may be alkaline earth metals including limestone, dolomite, or slaked lime that are supplied without the chemical firing process. Desulfurization and desalination reactions occur in the gasifier 100 by introducing sulfur and salt immobilization chemicals (desulfurization and desalting agents) into the gasification furnace 100 through the immobilization chemical supply device 120.

On the other hand, in the past, since the internal temperature of the gasification furnace is low and the temperature of the desulfurization and desalting agent is low, the desulfurization and desalting agent is fired and then put into the gasification furnace to increase the efficiency of the desulfurization and desalting process. On the other hand, since the gasifier of the present invention maintains an internal temperature of approximately 1,000 to 1,500 ° C., for example, 1,300 ° C. or more, there is no need to fire desulfurization and desalting agents, thereby reducing the use of auxiliary fuel, thereby reducing the use of auxiliary fuel. Can be. Therefore, alkaline earth metals can reduce the energy consumption of the gasification melting process by lowering the melting temperature by increasing the basicity of the incombustibles as well as the sulfur and salt is adsorbed and fixed. In addition, by fixing the sulfur and chlorine components in the slag, it is possible to reduce the treatment cost of the desulfurization and desalination process of the synthesis gas, and to reduce the amount of secondary pollution. This may reduce the cost of installing and operating air pollution control facilities.

The burner heats the waste, desulfurization and desalting agent in the gasifier 100 to raise the internal temperature, supplies an oxidizing agent, and melts the waste, desulfurization and desalting agent to slag. To this end, the burner may include a first burner 130, a second burner 140, and a third burner 150.

The first burner 130 is disposed on one side of the gasifier 100 to increase the internal temperature of the gasifier 100 and is installed to heat waste, desulfurization and desalting agent. The second burner 140 is installed to heat and melt the waste, desulfurization, and desalting agent that have passed through the first burner 130 to the other side of the gasifier 100.

The third burner 150 is installed on the upper part of the gasifier 100 and supplies an oxidant for reforming the synthesis gas.

In addition, the gasifier 100 may be manufactured in a substantially "┴" shape having a wide bottom and a high top in front. In the gasifier 100, an inlet 101, a slag outlet 103, and a waste heat outlet 105 are formed.

The inlet 101 is formed at one side of the lower end of the gasifier 100. The waste, desulfurization, and desalting agent supplied from the waste supply device 110 and the immobilized chemical supply device 120 are introduced into the gasifier 100 through the inlet 101. In addition, the slag outlet 105 is formed at the other end of the lower end of the gasifier. The slag in the gasifier 100 is discharged to the slag discharge device 190 through the slag discharge port 103. The waste heat outlet 105 is formed at an upper end of the gasifier 100, and heat inside the gasifier 100 is discharged to the outside through the waste heat outlet 105.

At this time, the upper part of the gasifier 100 is located in a position biased to one side to the waste input from the lower side with respect to the width, and thus may be connected to the slag discharge device 190 on the other side. Therefore, waste and immobilized chemicals are supplied from the lower part to the upper part, the first burner 130 is installed, and the slag discharge device 190 is installed at the other side opposite to the lower part, and the syngas generated in the furnace. May be manufactured to be discharged through the top. This is because waste and immobilized chemicals and oxidants are concentrated on a part of the gasifier 100 so that the gas synthesis reaction as well as desulfurization and desalination reactions are more concentrated than when distributed over a wide area.

In addition, the waste gasification melting system according to an embodiment of the present invention may further include a fuel supply device 160, pure oxygen supply device 170 and the control unit 200. In this case, the fuel supply device 160 is installed to supply fuel to the first burner 130, and the pure oxygen supply device 170 is installed to supply pure oxygen to the first burner 130. In addition, the control unit 200 is installed to maintain a constant internal temperature of the gasifier 100, and to control the supply of oxidizing agent, waste and desulfurization and desalting agent.

In addition, the gasifier 100 may further include a level sensor for detecting the height of the waste and the immobilized chemical, and adjusting the supply amount according to a preset height (amount). The data value of the level sensor is transmitted to the control unit 200, and may be configured to supply, adjust and stop supply of waste and immobilized chemicals in the control unit 200. Here, since the waste is supplied to the lower portion of the gasifier 100 and the generated syngas flows upward, the case where the syngas flows back to the waste supply device 110 and the immobilized chemical supply device 120 is avoided. Can be.

The waste supply device 110 is installed to supply, adjust and stop the waste to the gasifier 100 by a signal from the control unit 200, and may be manufactured including a conveyor, a screw, or a rotary.

The first burner 130 is installed to supply the gasifier 100 with an oxidant for generating and syngas, as well as inducing and promoting chemical reaction between waste and desulfurization and desalting agent. The first burner 130 may be installed at a site to which waste and desulfurization and desalting agents are supplied. The first burner 130 may be manufactured to supply fuel and pure oxygen to the gasifier 100 as an oxidant. Here, the fuel may be installed to be supplied from the fuel supply device 160 and the pure oxygen from the pure oxygen supply device 170 to the first burner 130. And the fuel is used to maintain the temperature of the synthesis gas while maintaining the temperature in the furnace for the initial temperature rise of the gasifier 100 or the amount of waste heat during operation, LNG or LPG may be used.

The second burner 140 may be installed to supply the oxidant while secondaryly generating the synthesis gas by heating and melting the waste, desulfurization, and desalting agent first heated by the first burner 130 again. To this end, the second burner 140 may be installed at the other side of the lower part for discharging slag from the gasifier 100. That is, the second burner 140 may be installed to supply pure oxygen, which is a fuel and / or an oxidant, and may be different from the installation position of the first burner 130. At this time, the pure oxygen is supplied from the pure oxygen supply device 170, the fuel is supplied from the fuel supply device 160, the pure oxygen supply device 170 or the fuel supply device () is respectively the first burner 130, One or two or more may be connected to at least one of the second burner 140 and the third burner 150. Here, the second burner 140 may be installed to melt and slag waste, desulfurization and desalting agent in the gasifier 100. Therefore, the waste, desulfurization and desalting agent is slag by the second burner 140. Can be converted to and discharged to the outside.

The third burner 150 may be installed on the upper part of the gasifier 100 for reforming the synthesis gas generated in the gasifier 100. Of course, this third burner may be supplied with fuel and / or oxygen.

The fuel supply device 160 is installed to supply fuel to at least one of the first burner 130, the second burner 140, and the third burner 150. Here, the fuel is either LNG or LPG, and may be used to increase the initial temperature of the gasifier 100 or to maintain the temperature in the furnace due to insufficient heat of waste during operation.

The pure oxygen supply device 170 is installed to supply pure oxygen to at least one of the first burner 130, the second burner 140, and the third burner 150. At this time, the pure oxygen flow rate control device 171 for controlling the supply amount of pure oxygen may be further installed. Through this pure oxygen, the concentration of sulfur compounds and chlorine compounds in the synthesis gas can be reduced. In this case, the pure oxygen may have an oxygen purity of about 93% or more.

The syngas measuring device 180 is installed to measure various components such as sulfur and salt, hydrogen and carbon dioxide, and various contaminants included in the syngas generated in the gasifier 100. The syngas measuring device 180 may be installed above the gasifier 100 and may be installed to transmit the measured data to the control unit 200.

The slag discharge device 190 is installed at the bottom of the gasifier 100 and opposite the position where the waste is supplied. For example, waste is introduced into one lower side of the gasifier 100, heated, desulfurized, and desalted by the first burner 130, and moved to the other lower side to be desulfurized while being heated and melted again by the second burner 140. And desalted and may be discharged into slag upon discharge. This slag is stable against sulfur and salt, so it is stable against contaminant leaching and can be recycled. The slag thus changed may be discharged to the outside of the gasifier 100 through the slag discharge device 190.

The control unit 200 receives data of the level sensor and the synthesis gas measuring device 180, the waste supply device 110, the immobilized chemical supply device 120, the first burner 130, the second burner 140, The fuel supply device 160, the fuel flow rate control device 161, the pure oxygen supply device 170, and the pure oxygen flow rate control device 171 are installed to control the fuel supply device 160. That is, the control unit 200 may be installed to control all the components in the syngas generator (GG). For example, by controlling the operation of the waste supply device 110 and the immobilized drug fixing device 120 through the data of the level sensor can adjust the supply amount of waste and desulfurization and desalting agent. In addition, the ratio and the supply amount of fuel and oxygen may be controlled through the data of the syngas measuring device 180.

Meanwhile, the purification device GP may include a heat recovery device 300, a dust filter dust collecting device 310, and a purification device.

The heat recovery device 300 is a device for recovering heat from the high temperature synthesis gas generated in the high temperature gasifier 100. The heat recovery device 300 may be installed so that the syngas discharged from the gasifier 100 flows in, and recovers the sensible heat of the syngas.

Dust filter bag 310 is a device for removing a variety of dust, including carbon dust in the synthesis gas discharged from the heat recovery device (300). The dust filter collector 310 may filter the dust in the synthesis gas, and prevent the clogging phenomenon of the flow pipe of the apparatus by the dust. At this time, the carbon dust collected by the dust filter bag 310 has a high calorific value in a dry powder state, and thus can be recycled into a furnace and used as a raw material. In addition, even the final disposal of the carbon dust can reduce the weight of the waste and save the use of the washing water.

The refining apparatus is to purify the syngas discharged from the dust filter bag 310, it may include a wet refining device 320, the advanced refining device 330.

The wet refining device 320 is a device for cooling the residual gas and cooling the synthesis gas discharged from the dust filter bag 310. The wet refining device 320 may be composed of a wet desalination unit, a wet desulfurization unit, and a water removing unit. Accordingly, the wet refining apparatus 320 may remove sulfur and salt remaining in the synthesis gas again.

The advanced purification device 330 is a device for highly purifying various pollutants contained in the synthesis gas introduced from the wet purification device 320.

In addition, the purification device GP may further include a hydrogen conversion device 340 and a gas separation and recovery device 360.

The hydrogen conversion device 340 is a device for converting carbon monoxide in the synthesis gas introduced from the advanced purification device 330 into hydrogen. The gas discharged from the hydrogen conversion device 340 is supplied to the gas separation and recovery device 360 through the gas supply device 350.

The gas separation and recovery device 360 is installed to extract carbon dioxide from the gas discharged from the hydrogen conversion device 340. That is, the gas separation and recovery device 360 is a device for producing hydrogen having a high purity of approximately 99.99% purity from the gas introduced from the gas supply device 350. The gas separation and recovery device 360 may be, for example, a PSA device.

Thereafter, the high purity hydrogen generated by the gas separation and recovery device 360 may be supplied to a hydrogen station of a hydrogen car or to a demand source for fuel cell power generation. In addition, the remaining amount of carbon dioxide extracted from the gas separation and recovery device 360 may be supplied to the carbon dioxide demand destination.

<Method>

A method for producing hydrogen using a waste gasification melting system in which furnace gasification and melting are integrated according to an embodiment of the present invention will be described in detail with reference to FIG. 4. Here, the gasifier 100 is heated to approximately 1,100 to 1,300 ° C in advance due to the first burner 130 supplied with fuel. Here, in the waste gasification melting system, waste, desulfurization and desalting agents are introduced into a gasification furnace, and desulfurization and desalination reactions are performed to convert the produced syngas into hydrogen.

First, the waste and desulfurization and desalting agent are supplied to the gasifier 100 (S10). Waste gas supplied with carbon dioxide may be supplied to the gasifier 100, and desulfurization and desalting agents for adsorbing and fixing sulfur and salts of the waste may be supplied to the gasifier 100. For example, the desulfurization and desalting agent composed of alkaline earth metals including limestone, dolomite, or slaked lime may be supplied to the gasifier 100 without the chemical firing process by the immobilized chemical supply device 120. At this time, the waste and desulfurization and desalting agent may be mixed or supplied separately.

Next, pure oxygen as an oxidant is supplied to the gasifier 100 through the first burner 130 and the second burner 140 to generate a synthesis gas (S20). The gas generating step is to generate the primary synthesis gas by supplying the oxidant while heating the waste and desulfurization and desalting agent introduced into the gasifier 100 to the first burner 130, and then moved waste and desulfurization and The desalting agent may be heated and melted again with the second burner to supply the oxidant again to generate a secondary synthesis gas.

In another aspect, the present invention may further comprise the step of supplying an oxidant in the gasifier to reform the synthesis gas generated in the gas generating step (S20).

The first burner 130 may supply the oxidant to a location where the waste and the desulfurization and the desalting agent are supplied to allow the synthesis gas to be generated. The second burner 140 may supply the oxidant to the site where the waste, the desulfurization, and the desalting agent slag to allow the synthesis gas to be generated. In addition, the third burner 150 may reform the syngas by supplying an oxidant to the syngas collected in the gasifier 100.

Thus, waste gas and desulfurization and desalting agent react in the gasifier 100 to generate syngas. In this case, the synthesis gas may be measured by the synthesis gas measuring device 180, and the supply amount of pure oxygen may be adjusted and supplied to the gasifier 100 based on the measurement data. Through this, the syngas is constantly produced, the desulfurization and desalination reaction is performed smoothly, and various contaminants including nitrogen in the syngas can be adjusted to be within a preset range.

Next, the sensible heat of the syngas discharged from the gasifier 100 is recovered (S30). Syngas discharged from the gasifier flows to the heat recovery device 300, and the sensible heat of the synthesis gas can be recovered from the heat recovery device 300.

Here, the method may further include a slag discharge step performed between the gas generating step (S20) and the sensible heat recovery step (S30). The slag discharge step discharges the slag generated by melting the waste, desulfurization and desalting agent in the gasifier to the outside of the gasifier.

Next, the dust in the synthesis gas is lowered temperature (S40). The synthesis gas discharged from the heat recovery device 300 may be flowed into the dust filter bag 310 to collect dust in the synthesis gas. At this time, the collected carbon dust can be recycled to the gasifier 100 can be used as a raw material.

Next, the synthesis gas is purified (S50, S50). The syngas purification step may include a step of wet purifying the syngas (S50) and a step of highly purifying the wet purified syngas (S60).

In the wet refining step (S50), the synthesis gas discharged from the dust filter bag 310 may be flowed into the wet refining device 320 to be purified by desulfurization and desalting in a wet manner, and water may be removed. This process may consist of a wet desulphurizer, a wet desalter and a water removal device. Next, the syngas advanced purification step (S60) may flow the syngas discharged from the wet refining apparatus 320 to the altitude refining apparatus 330 to highly refine various contaminants in the syngas.

Next, carbon monoxide in the synthesis gas is converted to hydrogen (S70). Synthesis gas discharged from the advanced purification device 330 may be flowed to the hydrogen conversion device 340 to convert carbon monoxide in the synthesis gas into hydrogen.

Finally, the carbon dioxide is separated from the gas (S80). Syngas discharged from the hydrogen conversion device 340 may be flowed to the gas supply device 350 and the gas separation and recovery device 360 to extract carbon dioxide from the gas, and generate high purity hydrogen.

The high purity hydrogen generated in this way can be supplied to a hydrogen station of a hydrogen car or a demand source for fuel cell power generation.

As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical spirit or essential features. Therefore, the above-described embodiments are to be understood in all respects as illustrative and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and equivalent concepts should be construed as being included in the scope of the present invention. do.

GG: Syngas Generator GP: Purifier
100: gasifier 110: waste feeder
120: immobilized chemical supply device 130: first burner
140: second burner 150: third burner
160: fuel supply device 161: fuel flow control device
170: pure oxygen supply device 171: pure oxygen flow control device
180: syngas measuring device 190: slag discharge device
200: control unit 300: heat recovery apparatus
310: dust filter bag 320: wet purifier
330: high-altitude purification device 340: hydrogen inverter
350: gas supply unit 360: gas separation recovery unit

Claims (16)

In a waste gasification melting system,
A gasification furnace installed to generate a gasification reaction at a high temperature;
A waste supply device installed to supply waste to the gasifier;
An immobilized chemical supply device installed to supply desulfurization and desalting agents to the gasifier; A first burner disposed at one side of the gasifier to heat waste, desulfurization and desalting agent while raising an internal temperature of the gasifier;
A second burner which generates slag by fixing sulfur and salt together with the waste by heating and melting waste, desulfurization and desalting agent, which have passed through the first burner to the other side of the gasification furnace, and melt together;
A third burner installed at an upper portion of the gasifier and supplying an oxidant for reforming synthesis gas; And
And a slag discharge device installed to discharge the slag generated by melting the waste together with the desulfurization and desalting agent in the gasifier and fixing sulfur and salt.
The gasification furnace is formed in a "┴" shape including a wide bottom and a high top in front,
An inlet disposed at an upper end of the lower side of the gasifier, into which waste, desulfurization, and desalting agent supplied from the waste supply device and the immobilized chemical supply device are introduced; A slag outlet disposed at a lower side of the lower end of the gasifier, and configured to discharge the slag generated by fixing sulfur and salt to the waste to the slag discharge device; And a waste heat outlet disposed at an upper end of the gasifier and discharging heat from the inside to the outside.
And a pure oxygen supply device for supplying pure oxygen to at least one of the first burner, the second burner, and the third burner. delete delete delete The method of claim 1,
A fuel supply device installed to supply fuel to the first burner;
A pure oxygen supply device installed to supply pure oxygen to the first burner; And,
And a control unit arranged to maintain a constant internal temperature of the gasifier and to control the supply of oxidant, waste and desulfurization and desalting agent. The fuel flow control system of claim 1, further comprising: a fuel flow rate control device installed to control a fuel flow rate of the fuel supply device;
A pure oxygen flow rate control device installed to control the pure oxygen flow rate of the pure oxygen supply device; And,
Waste gasification melting system further comprises a synthesis gas measuring device for measuring the components of the synthesis gas discharged from the gasifier. The method of claim 1,
A heat recovery device installed to recover sensible heat of the syngas discharged from the gasifier;
A dust filter collector installed to collect dust from the syngas discharged from the heat recovery device;
Waste gasification melting system further comprising a purifier installed to purify the synthesis gas discharged from the dust filter bag. The method of claim 7, wherein
The purification device,
A wet purifier installed to desulfurize and desalte the syngas discharged from the dust filter bag, and remove water;
Waste gasification melting system characterized in that it comprises a high-purification device installed to purify the syngas discharged from the wet purifier. The method of claim 7, wherein
A hydrogen conversion device installed to convert carbon monoxide in the syngas discharged from the purification device into hydrogen;
Waste gasification melting system further comprises a gas separation recovery device installed to extract carbon dioxide from the gas discharged from the hydrogen conversion device. The method of claim 1,
And the desulfurization and desalting agents are alkaline earth metals including limestone, dolomite or slaked lime which are supplied without firing. In the waste gasification melting system according to any one of claims 1 and 5 to 10, waste, desulfurization and desalting agents are introduced into the gasifier, and desulfurization and desalting reactions are performed to convert the produced syngas into hydrogen. In the hydrogen production method using a waste gasification melting system,
A supply step (S10) of supplying waste and desulfurization and desalting agent to the gasifier;
A gas generating step (S20) of generating a synthesis gas by supplying an oxidant to the gasifier;
A sensible heat recovery step (S30) for recovering sensible heat of the syngas discharged from the gasifier;
A dust collecting step (S40) for collecting dust in the syngas;
A purification step of purifying the syngas (S50, S60);
A hydrogen conversion step of converting carbon monoxide in the synthesis gas into hydrogen (S70); And,
Hydrogen generation method using a waste gasification melting system comprising a; carbon dioxide separation step (S90) for separating carbon dioxide from the synthesis gas. The method of claim 11,
The gas generation step (S20),
Generating a primary synthesis gas by supplying an oxidant while heating waste and desulfurization and desalting agent introduced into the gasifier with a first burner;
Thereafter, the moved waste and the desulfurization and desalting agent by heating and melting again with a second burner while supplying the oxidant again to produce a secondary synthesis gas, characterized in that the hydrogen production method using a waste gasification melting system. The method of claim 11,
It is performed between the gas generating step (S20) and the sensible heat recovery step (S30), the slag discharge step of discharging the slag generated while melting the waste and desulfurization and desalting agent in the gasifier to the outside of the gasifier further. Hydrogen generation method using a waste gasification melting system comprising. The method of claim 11,
The method for producing hydrogen using a waste gasification melting system further comprising the step of supplying an oxidant in the gasifier to reform the syngas generated in the gas generating step (S20). The method of claim 11,
Desulfurization and desalting agents supplied into the gasifier in the supplying step (S10),
A hydrogen production method using a waste gasification melting system, characterized in that the alkaline earth metals including limestone, dolomite or slaked lime supplied without a calcination process. The method of claim 11,
The purification step,
Wet purifying the syngas (S50);
Hydrogen generation method using a waste gasification melting system comprising the step (S60) of highly purified wet purified syngas.

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