KR20240064312A - Automatic injection system for solid pretreatment desulfurization catalyst - Google Patents

Abstract

The automatic injection system for a catalyst for solid pretreatment desulfurization according to an embodiment of the present invention includes a main silo formed with a plurality of lower discharge ports and receiving a catalyst for solid pretreatment desulfurization from an open upper inlet; It is located below the main silo and receives coal from each outlet at the bottom of the main silo, and is placed above the coal feed conveyor of the thermal power plant, and drops a solid pretreatment desulfurization catalyst on top of the coal transported through the coal feed conveyor. a plurality of metering silos for injecting the solid pretreatment desulfurization catalyst into the transported coal; And sensing the input amount of coal transported through the coal feed conveyor, and controlling the opening and closing of the outlet of the metering silo in conjunction with the sensed amount of coal input, so that the solid pretreatment desulfurization catalyst falls at a certain rate in proportion to the input amount of coal. It is characterized by including a sensing control unit that controls the input.

Description

Automatic injection system for solid pretreatment desulfurization catalyst}

The present invention relates to an automatic injection system for a solid pretreatment desulfurization catalyst. More specifically, the weight of the desulfurization catalyst is minimized and manufactured by impregnating and drying the liquid pretreatment desulfurization catalyst on a support having pores and solidifying it. This relates to an automatic solid pretreatment desulfurization catalyst injection system for automatically injecting a fixed amount of solid pretreatment desulfurization catalyst with simplified process equipment and improved storage stability and logistics costs into the coal supply of a thermal power plant.

Sulfur oxides (SOx) and nitrogen oxides (NOx) are pointed out as pollutants causing air pollution. In particular, sulfur oxides are contained in industrial exhaust gases emitted from the combustion of fossil fuels containing sulfur, causing acid rain. It is causing various problems such as environmental pollution.

Desulfurization methods for removing sulfur oxides from industrial exhaust gases have been continuously studied, and factories or power plants using fossil fuels have generally used flue gas desulfurization, a post-combustion treatment method.

The flue gas desulfurization method refers to burning fossil fuel containing sulfur gas and then desulfurizing the flue gas. This flue gas desulfurization method can be divided into a wet method and a dry method. The wet method is to remove sulfur oxides by washing the exhaust gas with ammonia water, sodium hydroxide solution, lime milk, etc., and the dry method is to remove sulfur oxides by contacting the exhaust gas with particles or powder such as activated carbon or carbonate to adsorb or react with sulfur dioxide. This is how to do it.

However, in order to use the flue gas desulfurization method, a separate desulfurization facility must be built to treat the flue gas, and the operation of the desulfurization facility requires a lot of manpower and costs, and the desulfurization process is complicated.

Therefore, in order to reduce the emissions of sulfur oxides associated with the combustion of fossil fuels, there is an urgent need for research on pretreatment desulfurization catalysts and desulfurization methods that simultaneously perform desulfurization during the fuel combustion process by pre-mixing the fuel with the fuel before combustion.

An example of such a catalyst for pretreatment desulfurization is clearly shown in Patent Registration No. 1864999 (hereinafter referred to as the ‘previous patent’) previously applied by the applicant of the present invention.

According to the above-mentioned earlier patent, a liquid pretreatment desulfurization catalyst, a method of manufacturing a desulfurization catalyst, and a desulfurization method using a desulfurization catalyst that are simple and easy to apply when burning fossil fuels and have excellent desulfurization effects are disclosed.

However, the above-described catalyst for liquid pretreatment desulfurization had the following problems.

First, the conventional liquid pretreatment desulfurization catalyst is manufactured in a liquid state by mixing liquid raw materials and water, so the manufacturing process equipment is complicated, storage safety is not good due to the characteristics of liquid chemical substances, and tank trucks are equipped with special containers in liquid form. Because it had to be transported using a vehicle, there was a problem of increased logistics and storage costs.

Second, the conventional liquid pretreatment desulfurization catalyst had the problem of increasing the cost burden on manufacturing process equipment as it required separate equipment for injection when mixed with combustion products such as coal or oil for pretreatment.

Third, when a large amount of conventional liquid pretreatment desulfurization catalyst is added to coal, for example, there is a problem of clogging of the coal inlet due to the gelation of the coal or flowing downward in the form of a slurry along with the coal on the conveyor belt transporting the coal. occurred.

For the above reasons, by solidifying the conventional liquid pretreatment desulfurization catalyst into a stable solid state, the weight of the desulfurization catalyst is minimized, manufacturing process equipment is simplified, and storage stability and logistics costs are improved. Development and distribution of a solid pretreatment desulfurization catalyst with improved storage stability and logistics costs. This situation is urgent.

Korean Patent Registration No. 1864999 (registered on May 30, 2018)

Accordingly, the present invention was developed to solve the above problems. By impregnating and drying the liquid pretreatment desulfurization catalyst on a support having pores and drying it to solidify it, the weight of the desulfurization catalyst is minimized and the manufacturing process equipment is simplified. The purpose is to provide an automatic injection system for a solid pretreatment desulfurization catalyst for automatically injecting a fixed amount of a solid pretreatment desulfurization catalyst with improved storage stability and logistics costs into the coal supply of a thermal power plant.

According to one embodiment, the automatic injection system of the catalyst for solid pretreatment desulfurization of the present invention to achieve the above object is a main silo ( silo); It is located below the main silo and receives coal from each outlet at the bottom of the main silo, and is placed above the coal feed conveyor of the thermal power plant, and drops a solid pretreatment desulfurization catalyst on top of the coal transported through the coal feed conveyor. a plurality of metering silos for injecting the solid pretreatment desulfurization catalyst into the transported coal; And sensing the input amount of coal transported through the coal feed conveyor, and controlling the opening and closing of the outlet of the metering silo in conjunction with the sensed amount of coal input, so that the solid pretreatment desulfurization catalyst falls at a certain rate in proportion to the input amount of coal. It is configured to include a sensing control unit that controls the input.

In addition, according to one embodiment, a vertical transport means for vertically transporting the solid pretreatment desulfurization catalyst from the ground to the upper inlet of the main silo is further provided on one side of the main silo.

Also, according to one embodiment, the vertical transport means is a bucket elevator or a hoist device.

In addition, according to one embodiment, a horizontal transport means for horizontally transporting the catalyst for solid pretreatment desulfurization is provided between the outlet of the main silo and the inlet of the metering silo, or between the outlet of the metering silo and the feed conveyor. It is provided.

Also, according to one embodiment, the horizontal transport means is a screw feeder or a belt conveyor.

In addition, according to one embodiment, the outer surface adjacent to the outlet of the main silo is further provided with at least one vibrator that adds vibration to prevent the solid pretreatment desulfurization catalyst discharged through the outlet of the main silo from stagnating. do.

In addition, according to one embodiment, a rotary valve for controlling the discharge of the catalyst for solid pretreatment desulfurization is further provided at the outlet of the main silo or metering silo.

Additionally, according to one embodiment, the sensing control unit includes: a load cell provided at the bottom of the coal feed conveyor to measure the instantaneous weight of the transported coal; and a motion detector provided above the coal feed conveyor to measure the transfer speed of the coal supplied.

Additionally, according to one embodiment, the metering silo injects a catalyst for solid pretreatment desulfurization into the coal feed at a rate of 0.1 to 0.5 wt% per hour relative to the weight of the feed coal transported on the feed conveyor.

In addition, according to one embodiment, the solid pretreatment desulfurization catalyst includes the steps of (a) preparing a liquid pretreatment desulfurization catalyst; (b) pulverizing the carrier having a porous structure to a certain size; (c) impregnating the carrier pulverized to a certain size in step (b) into the liquid pretreatment desulfurization catalyst prepared in step (a) for 10 to 60 minutes; (d) putting the support into a dryer with the liquid pretreatment desulfurization catalyst having penetrated into the pores of the support by impregnation in step (c) and then drying the support at a temperature of 100° C. or higher for a certain period of time; It is manufactured including.

In addition, according to one embodiment, after step (d), (e) pulverizing the dried support into powder with the liquid pretreatment desulfurization catalyst permeating the pores of the support; .

Also, according to one embodiment, after step (e), (f) the solid content prepared into powder through step (e) is used as a catalyst for solid pretreatment desulfurization, or the solid content is put into an extruder to form pellets. It further includes manufacturing a tablet, or introducing the solid content into a tablet press.

As described above, the automatic injection system for the solid pretreatment desulfurization catalyst of the present invention is automatically and quantitatively added to the coal supply of a thermal power plant as a pretreatment, and then adsorbs to ash generated from combustion particles during the combustion process to activate porosity and reduce ash. By adsorbing and removing sulfur oxides (SOx) present within the system with high efficiency, there is an excellent effect of reducing the emission of sulfur oxides before the exhaust gas is generated.

In addition, while the fed coal is moving on the conveyor, the solid pretreatment desulfurization catalyst is mixed at a certain ratio in relation to the weight of the fed coal at the upper part of the conveyor, so it is not only much simpler and easier to input than the conventional liquid desulfurization catalyst, but also is used for liquid desulfurization. It can be easily applied to various combustion facilities as the catalyst does not flow, so it has the effect of efficiently reducing sulfur oxide (SOx) emissions caused by combustion of fossil fuels before exhaust gas is discharged.

In addition, the desulfurization system according to the present invention can reduce sulfur oxides economically, inexpensively, quickly and easily by mixing combustion products with a solid pretreatment desulfurization catalyst and burning them, without constructing a separate desulfurization treatment facility for exhaust gas generated after combustion of combustion products. There is an economic effect.

1 is a flow chart explaining the manufacturing method of the catalyst for solid pretreatment desulfurization applied to the present invention.
Figure 2 is an illustration showing the overall configuration of the automatic injection system for the catalyst for solid pretreatment desulfurization of the present invention.
Figure 3 is a plan view of Figure 2

The terms used in this specification are merely used to describe specific embodiments and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as “include” or “have” or “equipped” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in this specification. It should be understood that this does not preclude the existence or addition of other features, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined herein, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains.

Terms defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. It shouldn't be.

Hereinafter, with reference to the attached drawings, a method for manufacturing a catalyst for solid pretreatment desulfurization applied to the present invention will be described in detail according to an embodiment.

Figure 1 is a flow chart explaining the manufacturing method of the catalyst for solid pretreatment desulfurization of the present invention.

First, looking at the manufacturing process of the catalyst for solid pretreatment desulfurization applied to the present invention with reference to FIG. 1, it may consist of the following steps according to one embodiment.

Step (a): Prepare a catalyst for liquid pretreatment desulfurization. (S100)

The catalyst for liquid pretreatment desulfurization according to the present invention can be manufactured according to the following detailed steps according to an embodiment.

Step (a-1): Mix and finely powder at least one oxide powder selected from the group consisting of SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O and P2O3.

Step (a-2): Mix and finely powder one or more metal powders selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd, and Pb.

Step (a-3): The oxide of step (a-1) and the metal of step (a-2) are mixed with sodium tetraborate (Na2B4O7.10H2O), sodium hydroxide (NaOH), sodium silicate (Na2SiO3), and A catalyst for desulfurization is formed by mixing with at least one liquid composition selected from the group consisting of hydrogen peroxide (H2O2).

The step (a-1) is a step of mixing one or more oxide powders selected from the group consisting of SiO2, Al2O3, Fe2O3, TiO2, MgO, MnO, CaO, Na2O, K2O and P2O3 and pulverizing them through a pulverizer.

In this step, the oxide powder contains 15 to 90 parts by weight of SiO2, 15 to 100 parts by weight of Al2O3, 10 to 50 parts by weight of Fe2O3, 5 to 15 parts by weight of TiO2, 20 to 150 parts by weight of MgO, 10 to 20 parts by weight of MnO, and 20 parts by weight of CaO. It may include ~200 parts by weight, 15-45 parts by weight of Na2O, 20-50 parts by weight of K2O, and 5-20 parts by weight of P2O3.

Additionally, the oxide powder finely divided in this step may be repeatedly finely divided to have a particle size of 1 to 2 ㎛.

The step (a-2) is a step of mixing one or more metal powders selected from the group consisting of Li, Cr, Co, Ni, Cu, Zn, Ga, Sr, Cd, and Pb and pulverizing them through a pulverizer.

In this step, the metal powder contains 0.0035 to 0.009 parts by weight of Li, 0.005 to 0.01 parts by weight of Cr, 0.001 to 0.005 parts by weight, Ni 0.006 to 0.015 parts by weight, 0.018 to 0.03 parts by weight of Cu, 0.035 to 0.05 parts by weight of Zn, and 0.04 parts by weight of Ga. It may include ~ 0.08 parts by weight, Sr 0.02 ~ 0.05 parts by weight, Cd 0.002 ~ 0.01 parts by weight, and Pb 0.003 ~ 0.005 parts by weight.

Additionally, the metal powder finely divided in this step may be repeatedly finely divided to have a particle size of 1 to 2 ㎛.

In step (a-3), the oxide powder and metal powder mixed and finely divided in step (a-1) and step (a-2) are mixed with sodium tetraborate (Na2B4O7.10H2O), sodium hydroxide (NaOH), It is mixed with at least one liquid composition selected from the group consisting of sodium silicate (Na2SiO3) and hydrogen peroxide (H2O2) to form a catalyst for liquid pretreatment desulfurization.

In this step, the liquid composition contains 20 to 130 parts by weight of sodium tetraborate (Na2B4O7.10H2O), 15 to 120 parts by weight of sodium hydroxide (NaOH), 50 to 250 parts by weight of sodium silicate (Na2SiO3), and 10 to 50 parts by weight of hydrogen peroxide (H2O2). It can be included as a part.

In addition, in this step, when reacting by mixing with the oxide powder and metal powder mixed and finely divided in steps (a-1) and (a-2), the oxide powder and liquid composition act as a chelating agent to combine with the metal powder. It can be chelated to form a metal chelate compound.

In addition, the liquid pretreatment desulfurization catalyst formed in this step is stabilized by precipitation for 24 to 72 hours, and the precipitated desulfurization catalyst can be separated and naturally dried to be used as a powder catalyst for desulfurization in powder form. The liquid composition remaining after separation can be used as a catalyst for liquid pretreatment desulfurization of the present invention.

Here, the precipitated precipitate of the liquid desulfurization catalyst was naturally dried and named powder catalyst for desulfurization (GTS-P), and the liquid composition from which the precipitated powder composition was separated was moved to a separate container and the liquid pretreatment desulfurization catalyst (GTS-P). It is named GTS).

For reference, the powder catalyst for desulfurization (GTS-P) can be solidified by naturally drying the precipitate of the liquid pretreatment desulfurization catalyst (GTS) as described above. However, in this case, various problems occurred as follows. .

First, because GTS-P has high viscosity, not only is the drying speed very slow, but also difficulties arise in internal drying due to solidification of the epidermal part. Accordingly, when the drying temperature was increased to dry GTS in an aqueous solution state, it existed in a high-viscosity liquid state due to its high solubility in moisture, resulting in complexity in manufacturing.

Second, corrosion occurred in the metal equipment after drying, and GTS deposits were created on the walls of the equipment. In addition, storage safety is poor due to moisture absorption when stored in normal atmospheric conditions, and the powdered solids of GTS-P obtained by simple drying absorb moisture in the air when dispersed in coal and liquefy rapidly, making addition methods and equipment complex. This occurred. For the above reasons, the powder catalyst for desulfurization (GTS-P) was unsuitable for use as a solid pretreatment desulfurization catalyst of the present invention.

Accordingly, the liquid pretreatment desulfurization catalyst (GTS), one of the main materials of the present invention, is manufactured and prepared through the above-described steps (a-1) to (a-3).

Step (b): The carrier having a porous structure with pores is pulverized to a certain size. (S200)

According to one embodiment, the carrier used porous materials such as expanded vermiculite, pearlite, diatomaceous earth, activated carbon, etc. The carrier used had an apparent specific gravity of 0.1 to 0.5, an absorption rate of 60 to 300 cc/100g, and a particle size of 10 to 2,000 ㎛.

The carrier is preferably a material with a porous structure. Numerous pores within the carrier have moisture-retaining ability and can properly contain desulfurizing components in a solid phase. In addition, it has breathability, so it produces sodium sulfate (Na2SO4) through reaction with sulfur oxides, and has particularly insulating properties, preventing decomposition reactions in high temperature areas. Normally, above 1200℃, sodium sulfate decomposes into sulfur oxides and is discharged into the exhaust gas, which may cause desulfurization performance to deteriorate. In addition, the strong alkaline desulfurization component is present in the porous material, acting as a three-dimensional barrier that can minimize the adhesion of strong alkali components to the inner wall of the combustion furnace, thereby avoiding high-temperature corrosion due to alkali adhesion to the inner wall of the combustion furnace. . In particular, expanded vermiculite, which has a plate-like structure, has a faster moisture absorption rate, which is advantageous for solid-liquid impregnation.

Step (c): The support ground to a certain size in step (b) is immersed in the liquid pretreatment desulfurization catalyst prepared in step (a) for 10 to 60 minutes. (S300)

According to one embodiment, the mass ratio of the liquid pretreatment desulfurization catalyst (GTS) and the vermiculite carrier may be mixed in the range of 5:1 to 20:1, and more preferably, the mass ratio is 10:1.

The vermiculite support is impregnated with the liquid pretreatment desulfurization catalyst (GTS) for at least 1 hour so that the liquid pretreatment desulfurization catalyst can be sufficiently impregnated between the pores of the vermiculite support.

Step (d): The support is placed in a dryer with the liquid pretreatment desulfurization catalyst penetrated into the pores of the support by impregnation in step (c), and then dried at a temperature of 100° C. or higher for a certain period of time. (S400)

Additionally, step (d) may consist of the following detailed steps according to one embodiment.

Step (d-1): After the carrier impregnated with the liquid pretreatment desulfurization catalyst is put into a dryer, the temperature inside the dryer is raised from room temperature to 130° C. and then primary dried for 2 hours.

Step (d-2): The carrier initially dried in step (d-1) is heated to 230°C and dried for a second time for 2 to 3 hours.

As described above, drying is carried out in multiple stages for a sufficient drying time through primary drying, which involves raising the temperature from room temperature to 130℃ and then drying, and secondary drying, which involves raising the temperature from 130℃ to 230℃ and then drying, so that the heat does not reach the inside of the porous structure. It was confirmed that even penetration occurred and even drying was achieved. In addition, in the drying experiment described later, it was confirmed that the water content of the support into which the liquid pretreatment desulfurization catalyst had penetrated reached less than 5% in the result of the secondary drying. (see Figures 3a, 3b)

Meanwhile, according to another embodiment, instead of going through the first and second drying processes of steps (d-1) and (d-2) step by step as in the above-described embodiment, only the second drying of step (d-2) is performed at 160 degrees Celsius. It is possible to reach a moisture content of less than 5% even after performing the procedure for several minutes. (See bottom table in Figure 3b)

In addition, in the above-described embodiment and other embodiments, when the dryer uses a drum-type powder dryer, the drying time can be further shortened because the carrier is dried while rolling in a drum-type drying tank, and thus the solid pretreatment of the present invention There are further advantages to continuously producing a catalyst for desulfurization.

Step (e): After the liquid pretreatment desulfurization catalyst has penetrated into the pores of the support and is dried, the support is placed in a grinder and pulverized to a certain size. (S500)

Solids can be pulverized to a particle size of 10 mesh (1.9 mm) or less through a pulverizer, but can be pulverized to an appropriate size depending on the type of combustion product and mixing method. Therefore, the solid prepared in powder form as described above can be directly used as the solid pretreatment desulfurization catalyst (first form) of the present invention.

Step (f): Inject the solid content prepared into powder through step (e) into an extruder to produce pellets (second form), or input the solid content into a tablet press to form tablets (third form). manufacture. (S600)

As described above, the solid pretreatment desulfurization catalyst of the present invention (hereinafter, (referred to as 'GTS-S') is finally manufactured.

In other words, dry products made into powder can be shipped as GTS-S products, processed into pellets using an extruder, or the solid content is pulverized to a particle size of 10 mesh (1.9 mm) or less through a grinder and then used a tablet press. Thus, various forms of GTS-S products can be manufactured, such as by processing them into tablets. At this time, according to one embodiment, the size of the pellets or tablets manufactured as above may be 2 mm to 50 mm in diameter, and the length may be within 1 compared to the diameter (L/D).

Meanwhile, the desulfurization method using a solid pretreatment desulfurization catalyst applied to the present invention adsorbs and removes sulfur oxides by pretreatment in the combustion process by premixing the solid pretreatment desulfurization catalyst prepared as described above with the combustion product and then burning it. It is characterized by

Additionally, according to one embodiment, the mixing ratio of the solid pretreatment desulfurization catalyst mixed with the combustion product may be adjusted according to the content ratio of C, H, N, and S contained in the combustion product. For example, if the combustion product is Vietnamese Uong Bi 3 coal, the sulfur content is high, so it is necessary to increase the input amount of the solid pretreatment desulfurization catalyst (GTS-S) applied in the present invention and mix it more than ordinary coal.

Hereinafter, with reference to FIGS. 2 and 3, the configuration of the automatic injection system for the catalyst for solid pretreatment desulfurization of the present invention will be described.

Figure 2 is an exemplary diagram showing the overall configuration of the automatic injection system for the catalyst for solid pretreatment desulfurization of the present invention, and Figure 3 is a plan view of Figure 2.

First, according to one embodiment, the automatic injection system 1000 of the catalyst for solid pretreatment desulfurization of the present invention is formed with a plurality of lower discharge ports and receives the solid pretreatment desulfurization catalyst (GTS-S) from the open upper inlet. A silo (1300) is provided.

According to one embodiment, two outlets at the bottom of the main silo 1300 are shown, but more may be formed. In addition, the lower part of the main silo 1300 has a hopper shape, but according to one embodiment, in FIGS. 2 and 3, it may be implemented in the form of a twin hopper with two (a pair) lower discharge ports. .

Additionally, a metering silo (1400) is provided below the main silo (1300). Here, the metering silo may be provided in plural. According to one embodiment, referring to FIGS. 2 and 3, there are two metering silos 1410, that is, a first metering silo 1410 and a second metering silo 1420, depending on the number of outlets of the main silo 1300. It can be provided.

Each of the first and second metering silos (1410) (1420) receives coal from each outlet at the bottom of the main silo (1300), and first and second coal supply conveyors ( They are placed above 100)(200), respectively. In this state, a solid pretreatment desulfurization catalyst (GTS-S) is placed on top of the coal transported on the first and second coal feed conveyors (100) (200) through the outlets of the first and second metering silos (1410) (1420). ) are respectively dropped to add the solid pretreatment desulfurization catalyst (GTS-S) to the transported coal at a certain ratio.

In addition, the first and second coal supply conveyors 100 and 200 are equipped with a sensing control unit that controls the solid pretreatment desulfurization catalyst (GTS-S) to be dropped and input at a certain rate in proportion to the amount of coal input.

According to one embodiment, the sensing control unit is a load cell (not shown) provided at the bottom of the first and second coal feed conveyors 100 and 200, respectively, to measure the instantaneous weight of the coal fed to the boiler of the thermal power plant. ); and motion detectors 1610 and 1620 that are provided above the first and second coal feed conveyors 100 and 200 and measure the transfer speed of the fed coal.

Accordingly, the load cell (not shown) senses the instantaneous weight of coal transported through the first and second coal feed conveyors 100 and 200, and detects the instantaneous weight of the coal through the motion detectors 1610 and 1620. The hourly transport speeds of the first and second feed conveyors 100 and 200 are measured respectively. Subsequently, the instantaneous weight of the coal feed obtained in this way can be multiplied by the hourly transfer speed of the coal feed conveyor to calculate the hourly input amount of coal.

Therefore, the input amount of the solid pretreatment desulfurization catalyst (GTS-S) can be controlled by controlling the opening and closing of the outlets of the first and second metering silos 1410 and 1420, respectively, in conjunction with the input amount of coal calculated as above. there is.

In addition, a vertical transport means is provided on one side of the main silo 1300 to vertically transport the solid pretreatment desulfurization catalyst (GTS-S) from the ground to the upper inlet of the main silo 1300.

According to one embodiment, the vertical transport means may be one of a bucket elevator (1200) or a hoist device.

More specifically, referring to FIGS. 2 and 3, the solid pretreatment desulfurization catalyst (GTS-S) can be vertically transported from the ground to the upper inlet of the main silo 1300 using the bucket elevator 1200. At this time, the solid pretreatment desulfurization catalyst (GTS-S) can be transported to the bucket elevator 1200 by a truck, etc. in a ton bag, and the operator can use a separate crane 1100 to load the solid pretreatment desulfurization catalyst (GTS-S) into the ton bag. The solid pretreatment desulfurization catalyst (GTS-S) can be transferred to a bucket of the bucket elevator 1200.

In addition, between the outlet of the main silo 1300 and the inlet of the first and second metering silos 1410 and 1420, or between each outlet of the first and second metering silos 1410 and 1420 and the first, A horizontal transfer means 1800 for horizontally transporting the solid pretreatment desulfurization catalyst (GTS-S) is provided at least at one location between the second coal feed conveyors 100 and 200.

According to one embodiment, the horizontal transport means 1800 may be one of a screw feeder or a belt conveyor. Accordingly, using the horizontal transfer means 1800, the outlet of the main silo 1300 and the first and second metering silos 1410 ( 1420), or between each outlet of the first and second metering silos 1410 and 1420 and the first and second feed conveyors 100 and 200, a solid pretreatment desulfurization catalyst (GTS-S) ) supply channels can be connected horizontally.

In addition, on the outer surface adjacent to the outlet of the main silo 1300, there is at least one vibrator ( A vibrator (1700) is provided. According to one embodiment, the vibrator 1700 may be controlled to operate together when the outlet of the main silo 1300 is opened.

In addition, a rotary valve 1500 is provided at the outlet of the main silo 1300 or the first and second metering silos 1410 and 1420 to control the discharge of the solid pretreatment desulfurization catalyst (GTS-S). The rotary valve 1500 is a device for supplying a fixed amount of powder-type solid pretreatment desulfurization catalyst (GTS-S) downward while the valve rotates. Referring to FIG. 2, according to one embodiment, the rotary valve 1500 ) can be provided at four locations (1510, 1520, 1530, 1540), one at each outlet.

According to one embodiment, the first and second metering silos 1410 and 1420 control the operation of the rotary valves 1530 and 1540 provided at the discharge port to produce a rate of 0.1 to 0.1 per hour relative to the weight of the coal supplied on the coal feed conveyor. A solid pretreatment desulfurization catalyst (GTS-S) is added to the coal supply at a rate of 0.5 wt%.

Here, the input rate of GTS-S in the range of 0.1 to 0.5 wt% is a value obtained through actual measurements by the applicant of the present invention on coal from various producing regions, and when GTS-S is input at less than 0.1 wt% per hour, sulfur oxides in coal It was confirmed that the reduction efficiency was reduced, and when the input exceeded 0.5 wt% per hour, the sulfur oxide reduction efficiency of coal was no longer increased and GTS-S was wasted.

Hereinafter, we will look at the process of calculating the input amount of the solid pretreatment desulfurization catalyst (GTS-S) assuming that the automatic injection system for the solid pretreatment desulfurization catalyst of the present invention of the above-described configuration is installed in a thermal power plant.

1. Coal input amount of thermal power plant (coal feed conveyor transfer volume): At least 130 tons to 250 tons per hour

2. Input rate of GTS-S: 0.1 to 0.5 wt% per hour compared to coal input amount

3. Input amount of GTS-S

That is, maximum input amount: 250 tons (coal feed) × 0.5 wt% = 1.25 tons/hour

That is, minimum input amount: 130 tons (coal feed) × 0.1 wt% = 0.13 tons/hour

Accordingly, as described above, according to an embodiment of the present invention, the input amount of GTS-S can be mixed with the feed coal transported to the boiler of a thermal power plant in the range of 0.13 to 1.25 tons per hour.

Therefore, by using the automatic injection system of the solid pretreatment desulfurization catalyst of the present invention, the solid pretreatment desulfurization catalyst (GTS-S) is automatically and quantitatively added as pretreatment to the coal supply to the thermal power plant, and then the combustion product (coal) is removed from the combustion product particles during the combustion process. By adsorbing to the generated ash to activate porosity and adsorbing and removing sulfur oxides (SOx) present in the ash with high efficiency, an excellent effect can be obtained in reducing the emission of sulfur oxides before the exhaust gas is generated.

In other words, the conventional flue gas desulfurization method removes sulfur oxides (SOx) contained in the generated flue gas after burning only the combustion products, so it has the disadvantage of requiring high desulfurization equipment to perform this process, manpower to operate it, and high costs. However, the automatic injection system using the solid pretreatment desulfurization catalyst according to the present invention mixes the solid pretreatment desulfurization catalyst (GTS-S) with the combustion product before combustion and then burns it together, so that the desulfurization catalyst is used during the combustion process. By adsorbing and removing sulfur oxides generated with the combustion of combustion products, an excellent desulfurization effect can be obtained that ultimately reduces sulfur oxide emissions in exhaust gas.

In addition, while the fed coal is moving on the conveyor, the solid pretreatment desulfurization catalyst is automatically added and mixed at a certain ratio in relation to the weight of the fed coal at the upper part of the conveyor, so it is much simpler and easier to add than the conventional liquid desulfurization catalyst. , The solid pretreatment desulfurization catalyst (GTS-S) used in the present invention does not flow down after being put into the coal supply, as suggested by the problem of the conventional liquid desulfurization catalyst, so it can be easily applied to various combustion facilities. .

In addition, the automatic injection system according to the present invention does not build a separate desulfurization treatment facility for exhaust gas generated after combustion of coal in a thermal power plant, but rather mixes combustion products with a solid pretreatment desulfurization catalyst before combustion and combusts it, making it economically inexpensive, quick and easy to burn. An economical effect can also be obtained by reducing sulfur oxides.

In addition, combustion products to which the catalyst for solid pretreatment desulfurization according to the present invention can be applied can be broadly applied to combustion products that generate heat through combustion, such as coal, oil, waste, and biogas. However, according to one embodiment of the present invention, Preferably, it can be easily applied to coal.

In addition, the above-mentioned solid pretreatment desulfurization catalyst is mixed in a certain ratio before combustion of the combustion product and then burned together with the combustion product. At this time, the amount of the solid pretreatment desulfurization catalyst mixed is adjusted according to the content of C, H, N, and S contained in the combustion product. By adjusting, excellent desulfurization effect can be maintained.

In addition, the present invention is not limited to just one embodiment described above, and the same effect can be created even when changing the detailed configuration, number, and arrangement structure of the device, so those skilled in the art will understand the present invention. It is stated that addition, deletion, and modification of various configurations are possible within the scope of the technical idea.

100, 200: Coal feed conveyor (of thermal power plant)
1000: Automatic injection system for catalyst for solid pretreatment desulfurization (of the present invention)
1100: Crane 1200: Bucket Elevator
1300: Main silo 1400: Metering silo
1500: Rotary valve 1600: Motion detector
1700: Vibrator 1800: Horizontal transfer means

Claims (12)

A main silo having a plurality of lower discharge ports and receiving a catalyst for solid pretreatment desulfurization from an open upper inlet;
It is located below the main silo and receives coal from each outlet at the bottom of the main silo, and is placed above the coal feed conveyor of the thermal power plant, and drops a solid pretreatment desulfurization catalyst on top of the coal transported through the coal feed conveyor. a plurality of metering silos for injecting the solid pretreatment desulfurization catalyst into the transported coal; and
By sensing the input amount of coal transported through the coal feed conveyor and controlling the opening and closing of each outlet of the metering silo in conjunction with the sensed input amount of coal, the catalyst for solid pretreatment desulfurization is dropped and injected at a certain rate in proportion to the amount of coal input. Containing a sensing control unit that controls the
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
One side of the main silo is further provided with a vertical transport means for vertically transporting the catalyst for solid pretreatment desulfurization from the ground to the upper inlet of the main silo.
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 2,
Characterized in that the vertical transport means is a bucket elevator or hoist device,
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
Horizontal transport means for horizontally transporting the catalyst for solid pretreatment desulfurization is further provided at least one of the main silo outlet and the metering silo inlet, or between the metering silo outlet and the feed conveyor,
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 4,
Characterized in that the horizontal transport means is a screw feeder or belt conveyor,
Automatic injection system for catalyst for solid pretreatment and desulfurization. According to claim 1,
At least one vibrator is further provided on the outer surface adjacent to the outlet of the main silo to add vibration to prevent the solid pretreatment desulfurization catalyst discharged through the outlet of the main silo from stagnating.
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
A rotary valve for controlling the discharge of the catalyst for solid pretreatment desulfurization is further provided at the outlet of the main silo or metering silo.
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
The sensing control unit,
A load cell provided at the bottom of the coal feed conveyor to measure the instantaneous weight of the transported coal; and
Including a motion detector that is provided above the coal feed conveyor and measures the transfer speed of the transported coal.
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
The metering silo is characterized in that the catalyst for solid pretreatment desulfurization is added to the coal feed at a rate of 0.1 to 0.5 wt% per hour relative to the weight of the coal fed on the coal feed conveyor.
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 1,
The catalyst for solid pretreatment desulfurization is,
(a) preparing a catalyst for liquid pretreatment desulfurization;
(b) pulverizing the carrier having a porous structure to a certain size;
(c) impregnating the carrier pulverized to a certain size in step (b) into the liquid pretreatment desulfurization catalyst prepared in step (a) for 10 to 60 minutes;
(d) putting the support into a dryer with the liquid pretreatment desulfurization catalyst having penetrated into the pores of the support by impregnation in step (c) and then drying the support at a temperature of 100° C. or higher for a certain period of time; Characterized in that it is manufactured including,
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 10,
After step (d) above,
(e) pulverizing the dried support into powder while the liquid pretreatment desulfurization catalyst has penetrated into the pores of the support, further comprising:
Automatic injection system for catalyst for solid pretreatment desulfurization. According to claim 11,
After step (e) above,
(f) Use the solid content prepared into powder through step (e) as a catalyst for solid pretreatment desulfurization, input the solid content into an extruder to produce pellets, or input the solid content into a tablet press to make tablets. Further comprising the step of manufacturing,
Automatic injection system for catalyst for solid pretreatment desulfurization.

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