JP4551165B2 - Dust remover, organic fuel gasification system and liquid fuel production system - Google Patents

Description

  The present invention relates to various gasifiers, dust removers capable of removing dust containing tar and char in the gas from the produced gas discharged from the combustion apparatus at low cost and high efficiency, and organic systems using the dust removers. The present invention relates to a fuel gasification system and a liquid fuel production system.

  Various combustors and gasifiers have been developed using fossil fuels such as oil and coal, waste, and combustible substances such as biomass. However, it contains a fine dust-like dust component. Whether these gases are used as a fuel gas or a raw material gas for synthesizing liquid fuel, or when they are treated as exhaust gas, it is necessary to carry out a process for removing dust in the gas with high accuracy.

  As the above-described gas dust removing device, a device using a water jet water droplet jet as a removal medium has been known (Patent Document 1), and various improvements have been proposed depending on the processing target. Among them, a representative example is shown in FIG.

  The dust removing device using the water jet water droplet jet sucks the gas 101 that requires dust removal processing to form a water jet water droplet jet 102 in the vertical axis direction, and communicates with the drive nozzle 103. The water jet water droplet jet 102 and the gas 101 are received by covering the water jet water droplet jet 102 released from the gas 103, and dust particles in the gas are attached to the water droplets to remove dust from the gas 101. A cylindrical scrubber unit 104 for performing the above-described operation, and an outlet for storing the water jet water droplet jet water as circulating water and sending the gas 101 from which the fine particle component and the water-soluble component are separated in the scrubber unit 104 to the next processing step A circulating water tank 105 having 105a, and a stirring means 1 for stirring the stored water in the circulating water tank 105 6, a discharge pipe 108 disposed at the lower end of the side of the circulating water tank 105, forcibly discharging the circulating water in the circulating water tank 105 by the circulation pump 107, and a strainer 109 interposed in the discharge pipe 108, It is an apparatus which comprises.

  The scrubber portion 104 is an integrally structured tubular member, and has a chamber portion 104a having a relatively large diameter, followed by a funnel-shaped suction portion 104b, a reduced diameter straight tubular throat portion 104c, and a diffuser that gradually increases in diameter. It is comprised from the part 104d and the wide expansion straight pipe | tube exit pipe | tube part 104e. The drive nozzle 103 is disposed in the center of the chamber portion 104 a, and the jet nozzle of the drive nozzle 103 is located at the center line of the scrubber portion 104. An inlet 104f for the gas 101 is formed on the side of the chamber portion 104a, and the gas 101 is set to be entrained in the water jet water droplet jet 102. The water jet water droplet jet 102 and the gas 101 merge at the suction portion 104b, and gas-liquid mixing is performed at a high flow velocity in the reduced diameter straight tubular throat portion 104c, thereby promoting adhesion and coalescence of dust particles to the water droplets. Thereafter, the water droplet jet is guided to the diffuser portion 104d, which gradually expands in diameter, and the flow velocity decreases, and the high flow velocity energy is changed to pressure energy to reduce the pressure loss of the scrubber. The water droplet flow in which the fine particle component and the water-soluble component are absorbed from the gas 101 flows into the circulating water tank 105 at a low speed from the outlet pipe portion 104e having a widened straight tube, and the gas 101 washed with water is supplied to the circulating water tank 105. The gas is discharged from the gas discharge port 105a to the next processing step via the upper space.

  The fine particles composed of dust, tar components, and char separated from the gas 101 by the water jet water droplet jet 102 and deposited on the water droplet are temporarily submerged in the water by dropping into the circulating water tank 105 together with the water droplet. Among the fine particle components, insoluble components having a high specific gravity such as a high specific gravity char are settled as they are, and tar components and low specific gravity hydrophobic chars are hydrophobic and light, and thus immediately rise to the surface of the water. Even in a state where the water droplet jet water continues to flow strongly, the floating separation component cannot be uniformly distributed in the circulating liquid. Therefore, even if the circulating fluid is sucked from the discharge pipe disposed in the lower part of the circulating water tank 15, the floating separation component can hardly be recovered. Therefore, in this apparatus, a stirring means 106 that stirs the water in the circulating water tank 105 is provided. By driving this agitation means 106, the water staying time of the floating separation component submerged in the water is prolonged by the water flowing down vigorously as described above, and the floating separation component is circulated through the discharge pipe 108 together with the circulating water. Suction is performed by the pump 107, and then separated and recovered by the strainer 109. The water from which the floating separation component is separated by the strainer 109 is sent from the circulation motor 107 to the drive nozzle 103 by the circulation line 110.

  The circulation line 110 is provided with a heat exchange type cooler 111 and an on-off valve 112 and a flow meter 113. Further, a bypass pipe 114 is connected to the downstream side of the cooler 111 in the circulation line 110 so as to send a part of the circulating water directly into the circulating water tank 105. An open / close valve 115 and a flow meter 116 are also attached to the bypass pipe 114.

Japanese Patent Laid-Open No. 10-63644

  The dust removing device can remove water-soluble substances in the gas and condensable dust such as tar by contact with a water jet water droplet jet. However, the tar condensation component and the low specific gravity hydrophobic char generated by the condensation are circulated in the water. Since it floats on the surface of the circulating water in the tank 105, it is difficult to efficiently take it from the circulating water tank 105 into the strainer 109. For this reason, the dust removing apparatus is provided with the stirring means 106, but the hydrophobic and low specific gravity fine particle component (floating separation component) cannot be efficiently guided to the discharge pipe 108. The floating separation component is unevenly distributed on the water surface and always remains to form a floating layer, which is a bottleneck in improving removal efficiency. Further, even if the high specific gravity char in the gas is subjected to water washing, it is deposited without being dissolved in the circulating water and deposited at the bottom of the circulating water tank (deposition component). When these are mixed in the circulating water and circulated, the circulation pump will be damaged in the long term and the cooler will become dirty, not only reducing the efficient operation of the dust remover, but also reducing the life of the dust remover. It will end up.

  The present invention has been made in view of the above circumstances, and each of the floating separation component (tar condensation component and low specific gravity hydrophobic char) separated from the gas by the water jet water droplet jet and the efficient of the deposition component (high specific gravity char). It is an object of the present invention to provide a dust removing device that has a simple separation means, thereby realizing dust removal efficiency and extending the life of the device, and an organic fuel gasification system and a liquid fuel production system using the dust removing device. Is.

  The dust removing device of the invention of [Claim 1] that solves the above-described problem is a drive nozzle that sucks untreated gas to form a water jet water droplet jet in the vertical axis direction, and communicates with the drive nozzle, and the drive nozzle The water jet water droplet jet and the generated gas that are received so as to cover the jet water droplet jet discharged from the gas-liquid mixture, and a scrubber portion that performs dust removal of the generated gas, and the water jet water droplet jet water after the gas-liquid mixing Receiving the generated gas and temporarily storing the jet water as circulating water, and discharging the gas out of the system, and adjacent to the primary storage tank, the inner bottom of the primary storage tank A secondary storage tank having a suction pipe opening in the secondary storage tank; a floating separation component discharge means disposed in the secondary storage tank for discharging the floating separation component of circulating water in the secondary storage tank; and the secondary Formed under the distillate tank, characterized in that it comprises a feed water discharge pipe for forcibly ejected by a circulation pump circulating water of the secondary storage tank.

  The invention of [Claim 2] is characterized in that in the dust removing apparatus according to claim 1, the capacity of the primary storage tank is set to be smaller than the capacity of the secondary storage tank.

  The invention of [Claim 3] is the dust removal apparatus according to claim 1 or 2, wherein a sedimentary component discharge pipe is provided at a bottom of the secondary storage tank, and the secondary storage tank faces the sedimentary component discharge pipe. The bottom part of this is inclined downward.

  The invention of [Claim 4] is characterized in that in the dust removing apparatus according to any one of Claims 1 to 3, a water supply port is provided in an upper part of the secondary storage tank.

  The invention of [Claim 5] is the dust removal apparatus according to any one of Claims 1 to 4, wherein the floating separation component discharge means opens into a floating layer composed of at least the floating separation component. And a slurry pump interposed in the discharge pipe.

  The invention of [Claim 6] is the dust removing apparatus according to any one of Claims 1 to 4, wherein the floating separation component discharge means narrows at least the upper part of the secondary storage tank toward the upper end. It is characterized by comprising a tapered floating separation component collecting section formed in this way and a discharge means provided at the upper narrow portion of the floating separation component collection section.

  The invention of [Seventh aspect] is characterized in that in the dust removing apparatus according to the sixth aspect, a feeder means for sending the floating separation component toward the discharge means is provided in the narrowed upper end portion.

  The invention of [8] is the dust removing apparatus according to any one of claims 1 to 7, wherein the liquid level of the secondary storage tank is maintained lower than the liquid level of the primary storage tank. It is characterized by being.

  [9] The dust removal apparatus according to any one of [1] to [4], wherein the floating separation component discharge means is at least an overflow discharge formed at an upper portion of the secondary storage tank. It is characterized by comprising a liquid port and a drainage reservoir to which a discharge pipe is attached.

  [Claim 10] The dust removing apparatus according to claim 9, wherein a rake for scraping the floating separation component toward the overflow drainage port is provided at an upper portion in the secondary storage tank. Features.

  [11] The dust removing device according to [10], wherein the upper space in the primary storage tank and the upper space of the secondary storage tank are communicated with each other.

  [Claim 12] The dust removing apparatus according to claim 11 is characterized in that a pressurized water inlet for injecting pressurized water containing bubbles is provided in a lower part of the secondary storage tank. .

  The invention of [Claim 13] is characterized in that, in the dust removing apparatus according to Claim 12, stored water in the primary storage tank is used as the pressurized water.

  [14] The dust removing apparatus according to any one of [1] to [13], wherein a strainer is interposed downstream of the circulating pump of the circulating water discharge pipe.

  [15] The dust removing apparatus according to any one of [1] to [14], wherein a chemical injection port is provided in the secondary storage tank.

  [Claim 16] The dust removal apparatus according to any one of claims 1 to 15, wherein the untreated gas is a gas generated by a gasification furnace of an organic fuel. .

The invention of [17] is an organic fuel gasification system comprising a furnace body, biomass supply means for supplying biomass into the furnace body, and oxygen or a mixture of oxygen and water vapor in the furnace body. An oxidant supply means for supplying an oxidant for combustion comprising: a separation means for removing dust in the product gas gasified in the biomass gasification furnace; and the separation means The dust removing apparatus according to any one of claims 1 to 16 , wherein the dust from which dust having a relatively large particle diameter of 3 µm or more has been removed is further removed with high precision, and the gas removed with high precision is purified. And a gas purification device .

The invention of [18] is a liquid fuel production system using an organic fuel, a furnace main body, a biomass supply means for supplying biomass into the furnace main body, and oxygen or oxygen in the furnace main body. A biomass gasification furnace comprising an oxidant supply means for supplying a combustion oxidant comprising a mixture of water vapor, a separation means for removing dust in the product gas gasified in the biomass gasification furnace, and The dust removing apparatus according to any one of claims 1 to 16 , wherein the gas from which dust having a relatively large particle size of 3 µm or more has been removed by the separating means is further precisely removed, and the highly dust-removed gas. And a liquid fuel synthesizer equipped with a distillation device for synthesizing methanol using the purified gas and separating it into exhaust gas and methanol .

  According to the present invention, in a dust removing device that removes dust of generated gas discharged from various gasifiers and combustion devices using a water jet water droplet jet, dust containing tar and char in the gas is removed at low cost and with high efficiency. Thereby providing an efficient organic fuel gasification system and liquid fuel production system.

  Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments.

(First embodiment)
FIG. 1 is an overall configuration diagram showing an example of a dust removing device according to the present invention. Elements common to those in FIG. 9 are denoted by the same reference numerals.

  The feature of the dust removing device using the water jet water droplet jet is that two tanks of the primary storage tank 1 and the secondary storage tank 2 are used instead of the conventional circulating water tank 105.

  The primary storage tank 1 is a small-capacity tank that receives the water jet water droplet jet water and generated gas after gas-liquid mixing from the scrubber unit 104 and temporarily stores the jet water as circulating water. Is formed with a gas outlet 1a.

  The secondary storage tank 2 is a large-capacity storage tank that is adjacent to the primary storage tank 1 and has a suction pipe 2 a that opens to the inner bottom of the primary storage tank 1. A circulating water discharge pipe 108 for forcibly discharging the circulating water in 2 is connected. A circulating pump 107 is interposed in the circulating water discharge pipe 108 so that the water in the secondary storage tank 2 is fed into the circulation line 110. By adjusting the forced discharge amount of circulating water in the secondary storage tank 2 by the circulation pump 107 and the amount of water flowing down from the scrubber unit 104, the water level in the primary storage tank 1 is changed to the water level in the secondary storage tank 2. It is positioned higher and its head is kept constant.

  The capacity of the primary storage tank 1 is set to be significantly smaller than the capacity of the secondary storage tank 2, and a large amount of water in the secondary storage tank 2 is forced from a circulating water discharge pipe 108 provided in the lower part. It is sent out to the circulation line 110. In the primary storage tank 1 that receives the water that has flowed down vigorously from the scrubber section 104, the tank capacity is extremely small, so that the levitation made up of “tar condensation components and low specific gravity hydrophobic char” contained in the flowing water The fine-grained components that are easy to do remain dispersed throughout without floating and separating. In addition, a high specific gravity fine particle component that is easily deposited, consisting of “high specific gravity char”, is also stirred and in a fluid state. The water in the primary storage tank 1 is transferred into the secondary storage tank 2 via the suction pipe 2a without overflowing while the fine specific gravity component and the high specific gravity fine particle component are in a dispersed and flowing state. The

  Since the secondary storage tank 2 has a large capacity and is not agitated by the flowing water from the scrubber unit 104, the water moved from the primary storage tank 1 to the secondary storage tank 2 is dispersed therein. The finely divided fine particles composed of the “tar condensed component and the low specific gravity hydrophobic char” are easily levitated and separated. The floating separation components 3 are aggregated to form a floating layer 4. On the other hand, the high specific gravity char contained in the water in the tank 2 settles and deposits on the bottom surface of the tank 2 as a deposition component 5.

  The secondary storage tank 2 is provided with a floating separation component discharge means 6 for discharging the floating separation component 3 to the outside of the tank. In the present embodiment, the floating separation component discharge means 6 includes a discharge pipe 7 that opens into the floating layer 4 made of the floating separation component 3 and a slurry pump 8 interposed in the discharge pipe 7. ing.

  The bottom surface of the secondary storage tank 2 is inclined downward toward one end, and a fixed volume component discharge pipe 2b is attached to the lowest portion. Since the deposited component 5 on the bottom surface of the tank 2 is collected in the deposited component discharge pipe 2b along the inclined surface, the deposited component 5 can be separated from the water in the tank 2 and recovered by opening the discharge pipe 2b. it can.

  In the secondary storage tank 2, the floating separation component 3 and the deposition component 5 are removed out of the system, and there is also an evaporation loss from the gas outlet 1a, and as it is, the scrubber unit 104 → the primary storage tank 1 → the secondary The amount of circulating water in the entire circulation line composed of the storage tank 2 → the circulation line 110 → (the scrubber unit 104) gradually decreases. In order to compensate for the loss of water, a water supply port 9 is provided in the upper part of the secondary storage tank 2 to replenish water from outside the system.

  In the above configuration, the floating separation component discharge means 6 is composed of the combination of the discharge pipe 7 and the slurry pump 8. However, if the viscosity of the floating separation component is easy to flow, the floating separation component discharge means 6 is composed only of the discharge pipe 7. Also good. The slurry pump 8 is indispensable when the viscosity of the floating separation component is so large that it is difficult to flow, or when it is placed in a low-temperature environment such as winter and accompanied by an increase in viscosity.

(Second Embodiment)
FIG. 2 is an overall configuration diagram showing a second embodiment of the dust removing apparatus according to the present invention. Elements common to those in FIG.

  The feature of the dust removal device of this embodiment is that the specific configuration of the floating separation component discharge means 6 in the dust removal device of the first embodiment is different, and accordingly, the water level in the primary storage tank 1 and the secondary storage tank The difference is that the water level of 2 is set to the same water level, and other configurations are the same as those in the first embodiment.

  The floating separation component discharge means 6 in the present embodiment includes an overflow drain port 10 formed in a side portion of the secondary storage tank 2, a drainage reservoir 11 attached to the outside thereof, and the drainage reservoir 11. The drainage pipe 12 is connected to the bottom. It is preferable that a slurry pump 13 is interposed in the drainage pipe 12, and as described in the first embodiment, if the floating separation component has a relatively high viscosity, The floating separation component 3 can be forcibly discharged easily.

(Third embodiment)
FIG. 3 is an overall configuration diagram showing a third embodiment of the dust removing apparatus according to the present invention. Elements common to those in FIG.

  The feature of the dust removing device of this embodiment is that, in the dust removing device of the first embodiment, the floating separation component 3 is placed in the upper part of the secondary storage tank 2 as the component of the floating separation component discharging means 6. A rake 14 that is scraped toward the liquid port 10 is further provided. Moreover, in this embodiment, the pressure equalization line 15 is formed by connecting the upper part of the primary storage tank 1 and the secondary storage tank 2, and the primary storage tank 1 and the secondary storage tank are formed by this pressure equalization line 15. 2 and the water level is the same and stabilized. By stabilizing the water level of the secondary storage tank 2 and providing the rake 14, it becomes possible to discharge the floating separation component 3 more efficiently and stably.

(Fourth embodiment)
FIG. 4 is an overall configuration diagram showing a fourth embodiment of the dust removing apparatus according to the present invention, and elements common to those in FIGS.

  The feature of the dust removing device of this embodiment is that in the dust removing device of the first to third embodiments, the floating separation component discharging means 6 is formed by narrowing the upper part of the secondary storage tank 2 toward the upper end. In the same manner as in each of the first to third embodiments, except that it is composed of a tapered floating separation component collection unit 16 and a discharge pipe 17 provided in the upper narrow portion 16a of the floating separation component collection unit 16. That is to be formed.

  In this embodiment, the water level in the secondary storage tank 2 is set lower than the water level in the primary storage tank 1. As described above, the upper part of the secondary storage tank 2 is narrowed as it goes upward, and the discharge pipe 17 is connected to the tip thereof, so that the amount of the floating separation component 3 is reduced. As the number increases, the floating layer 4 becomes thick unless the floating separation component 3 is positively discharged. In this state, the floating layer 4 is always subjected to upward water pressure. Therefore, when the discharge pipe 17 is opened, the floating separation component 3 is pushed out of the tank through the discharge pipe 17. Further, as described above, it is preferable that a slurry pump 18 is interposed in the discharge pipe 17 in order to promote discharge when the concentration of the floating separation component 3 is high.

(Fifth embodiment)
FIG. 5 is a main part configuration diagram showing a fifth embodiment of the dust removing apparatus according to the present invention. Elements common to those in FIG.

  The feature of the dust removing device of this embodiment is that in the dust removing device of the fourth embodiment, as a component of the floating separation component discharging means 6, a helical screw located from the lower part of the floating separation component collecting unit 16 to the upper narrow portion 16a. (Feeder means) 19 is further provided. Since this helical screw 19 is rotated by the motor 20 to forcibly lift up the high-flying separation component 3 toward the discharge pipe 17, it is possible to discharge the floating separation component 3 more efficiently. become.

(Sixth embodiment)
FIG. 6 shows a sixth embodiment of the dust removing apparatus according to the present invention, and the same components as those shown in FIG.
The feature of this embodiment is that a pressurized water inlet 21 for injecting pressurized water containing bubbles is provided in the lower part of the secondary storage tank 2. This pressurized water may be supplied from outside the system, and as in this embodiment, the branch pipe 22 is connected to the circulation line 110 immediately after the circulation pump 107, and this branch pipe 22 is connected to the pressurized water inlet 21. You may make it supply pressurized water by connecting. In order to generate pressurized water in the branch pipe 22, a suction pipe 23 is connected to the center of the side portion of the primary storage tank 1, the tip of the suction pipe 23 is connected to the upstream side of the circulation pump 107, and air bubbles are caught by the circulation pump 107. Set so that you can.

  By generating bubbles from the bottom surface of the secondary storage tank 2, condensation of the low-specific gravity hydrophobic fine particle components dispersed in the circulating water can be promoted, and the production rate of the floating separation component 3 can be increased. it can. In addition, although this pressurized water injection | pouring structure was formed in the secondary storage tank of the said 4th Embodiment, it can form similarly in the secondary tank of another Example, and can acquire the same effect. .

  As another form, although illustrated in the case of the dust removing device of the second embodiment, as shown in FIG. 7, in the dust removing device of the present invention, a chemical injection port 24 is provided in the upper part of the secondary storage tank 2. Also good. Various chemicals can be introduced from the chemical injection port 24 to further purify the circulating water and control contaminants. For example, by injecting a flocculant, the rising speed of a tar component or low specific gravity hydrophobic char can be increased, or an acidifying agent can be injected to prevent dissolution of cyanide.

(Seventh embodiment)
FIG. 8 shows an embodiment in which the above-described dust removing apparatus of the present invention is used in a liquid fuel synthesizing system using biomass, which is a typical example of organic fuel.

  Biomass generally refers to organisms that can be used as energy sources or industrial raw materials (for example, agricultural products or by-products, wood, plants, etc.), and are produced by the action of solar energy, air, water, soil, etc. So it can be played indefinitely.

By using the biomass, it is possible to produce a clean energy source such as fuel gas and methanol. Further, since biomass as waste can be treated, it is useful for purification of the environment, and newly produced biomass is also grown by fixing CO ₂ by photosynthesis, so that CO ₂ in the atmosphere is not increased, so CO ₂ This is a preferable technique because it leads to suppression of the problem.

  Biomass comprising biomass supply means 32 for supplying biomass 30 into the furnace body 31 and oxidant supply means 34 for supplying combustion oxidant 33 made of oxygen or a mixture of oxygen and water vapor into the furnace body 31. Gasification furnace 35, separation means 37 such as a cyclone for removing dust in the product gas 36 gasified by the biomass gasification furnace 35, and removal of dust having a relatively large particle diameter of 3 μm or more by the separation means 37 The dust removing device 11 according to the present invention for removing dust with higher accuracy, the gas purifying device 38 for purifying the dust removed with high accuracy, and synthesizing methanol (liquid fuel) using the purified gas. The liquid fuel production system 43 is constituted by a liquid fuel synthesizing apparatus 42 provided with a distillation apparatus 41 for separating the exhaust gas 39 and the methanol 40.

  As the biomass 30 to be supplied, it is preferable to supply pulverized and dried biomass produced or discarded. Biomass referred to in the present invention refers to biological resources that can be used as an energy source or industrial raw material (for example, agricultural products or by-products, wood, plants, etc.), for example, sweet sorghum, napiergrass, spirulina, etc. It has been.

  The gas produced using biomass as a raw material contains particulate components such as char, tar components, hydrogen sulfide, chlorine, etc., so as it is, it synthesizes liquid fuels using synthetic catalysts and energy sources for fuel cells. It is not suitable for gas. Therefore, in the present invention, by using the dust removing apparatus A using the water jet water droplet jet shown in each of the above-described embodiments, trace components such as fine particles, tar components, hydrogen sulfide, and chlorine are efficiently removed. Yes. The mechanism of the removal is as described in the above embodiments. As a raw material gas for obtaining an energy source for a liquid fuel or a fuel cell, in actual operation, it is necessary to reduce the allowable content of the trace component to a detection limit amount. If the dust removal apparatus A is used and a high-precision adsorption purification apparatus is used in combination as necessary, it is possible to sufficiently reduce the trace components that have been difficult in the past. In addition, the system in the case of obtaining mainly clean production | generation gas from biomass is realizable with the component to the gas purification apparatus 38 of FIG.

  As described above, the dust removing apparatus according to the present invention is configured to suck the untreated gas and form a water jet water droplet jet in the vertical axis direction, communicated with the drive nozzle, and discharged from the drive nozzle. A scrubber unit that performs gas-liquid mixing of the water jet water droplet jet and the generated gas by receiving the jet water droplet jet so as to cover the dust, and dust removal of the generated gas, and water jet water droplet jet water and the generated gas after the gas-liquid mixing, In response, the jet water is temporarily stored as circulating water, and the primary storage tank that discharges the gas to the outside of the system, and the suction that is adjacent to the primary storage tank and opens to the inner bottom of the primary storage tank A secondary storage tank having a pipe, a floating separation component discharging means disposed in the secondary storage tank and discharging a floating separation component of circulating water in the secondary storage tank, and the secondary storage tank It is formed in a lower portion, and is characterized in that it comprises a feed water discharge pipe for forcibly ejected circulating water of the secondary storage tank by a circulation pump.

  The organic fuel gasification system and the liquid fuel production system using the organic fuel according to the present invention are characterized by using the dust removing device.

  In the dust removal apparatus of the present invention, the capacity of the primary storage tank is set to be significantly smaller than the capacity of the secondary storage tank, and the large-capacity water in the secondary storage tank is a circulating water discharge pipe provided at the bottom. Is forcibly sent to the circulation line. In the primary storage tank that receives water that has flowed down vigorously from the scrubber, the tank capacity is extremely small, so it tends to float up consisting of "tar condensation components and low specific gravity hydrophobic char" contained in the flowing water. The fine particle component remains dispersed throughout without floating and separating. The water in the primary storage tank is transferred into the secondary storage tank via the suction pipe without overflowing while the fine particle component remains in a dispersed state. Since the secondary storage tank has a large capacity and is not agitated by the flowing water from the scrubber portion, the water moved from the primary storage tank to the secondary storage tank was dispersed therein. The finely divided fine particles composed of the tar condensation component and the low specific gravity hydrophobic char easily float and separate. This floating separation component is easily and efficiently discharged out of the system by the floating separation component discharge means. Further, the sediment component derived from the high specific gravity char in the gas is efficiently discharged out of the tank from the sediment component discharge pipe by utilizing the phenomenon of natural sedimentation due to its high specific gravity. Therefore, in this dust removal apparatus, the mixing rate of the floating separation component and the sediment component of the circulating water circulated in the circulating water discharge pipe and the circulation line is greatly reduced. Therefore, it is possible to significantly extend the life of the apparatus without damaging parts such as the circulation pump and the strainer.

  According to the dust removing device of the present invention, as described above, high-precision dust removal is possible without imposing a burden on the device, and the gas discharged from the gasifier or the combustion device is purified to a clean gas. Can do. Particularly when applied to gasification systems for organic fuels such as biomass and liquid fuel production systems using organic fuels, the yield of useful fuel gas and liquid fuel is high because the purity of the gas is high. It becomes possible to manufacture at a rate.

It is a schematic block diagram which shows 1st Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a schematic block diagram which shows 2nd Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a schematic block diagram which shows 3rd Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a schematic block diagram which shows 4th Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a schematic block diagram which shows 5th Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a schematic block diagram which shows 6th Embodiment of the dust removal apparatus using the water jet water droplet jet which concerns on this invention. It is a block diagram at the time of further attaching a chemical | medical agent injection port to the dust removal apparatus of FIG. 1 is an overall configuration diagram of a “liquid fuel production system using an organic fuel (biomass)” according to the present invention using a dust removing device of the present invention. It is a block diagram which shows an example of the dust removal apparatus using the conventional water jet water droplet jet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Primary storage tank 1a Gas outlet 2 Secondary storage tank 2a Suction pipe 2b Sediment component discharge pipe 3 Floating separation component 4 Floating layer 5 Sedimentation component 6 Floating separation component discharge means 7 Drain pipe 8 Slurry pump 9 Water supply port 10 Overflow drain port DESCRIPTION OF SYMBOLS 11 Drain reservoir 12 Discharge pipe 13 Slurry pump 14 Rake 15 Pressure equalization line 16 Floating separation component collection part 16a Narrow part of upper end 17 Discharge pipe 18 Slurry pump 19 Helical screw (feeder means)
DESCRIPTION OF SYMBOLS 20 Motor 21 Pressurized water injection port 22 Branch piping 23 Suction tube 24 Chemical injection port 30 Biomass 35 Biomass gasification furnace 101 Untreated gas 102 Water jet water droplet jet 103 Drive nozzle 104 Scrubber part 104a Opening part of scrubber part 105 Circulating water tank 105a Discharge port 105b Liquid level in the circulating water tank 107 Circulating pump 108 Discharge pipe 109 Strainer A Dust removal apparatus of the present invention

Claims (18)

A drive nozzle for sucking untreated gas and forming a water jet water droplet jet in the vertical axis direction;
A scrubber unit that communicates with the driving nozzle and gas-liquid mixes the water jet water droplet jet and the generated gas by receiving the jet water droplet jet discharged from the driving nozzle so as to remove dust from the generated gas;
A primary storage tank that receives the water jet water droplet jet water and the generated gas after the gas-liquid mixing, temporarily stores the jet water as circulating water, and discharges the gas outside the system;
A secondary storage tank adjacent to the primary storage tank and having a suction pipe that opens to the inner bottom of the primary storage tank;
A floating separation component discharging means disposed in the secondary storage tank and discharging the floating separation component of circulating water in the secondary storage tank;
A dust removing device, comprising: a circulating water discharge pipe formed under the secondary storage tank and forcibly discharging the circulating water in the secondary storage tank by a circulation pump.   The dust removing device according to claim 1, wherein a capacity of the primary storage tank is set smaller than a capacity of the secondary storage tank.   The sedimentary component discharge pipe is provided at the bottom of the secondary storage tank, and the bottom of the secondary storage tank is inclined downward toward the sedimentary component discharge pipe. Dust removal device.   The dust removing device according to any one of claims 1 to 3, wherein a water supply port is provided in an upper portion of the secondary storage tank.   2. The floating separation component discharge means comprises at least a discharge pipe that opens into a floating layer made of the floating separation component, and a slurry pump interposed in the discharge pipe. The dust removing apparatus of any one of -4.   The floating separation component discharging means includes at least a tapered floating separation component collecting portion formed by narrowing an upper portion of the secondary storage tank toward the upper end, and an upper end narrow portion of the floating separation component collecting portion. It is comprised from the provided discharge means, The dust removal apparatus of any one of Claims 1-4 characterized by the above-mentioned.   The dust removing apparatus according to claim 6, wherein a feeder means for sending the floating separation component toward the discharge means is provided in the upper narrow portion.   The dust removing device according to any one of claims 1 to 7, wherein a liquid level of the secondary storage tank is set to be kept lower than a liquid level of the primary storage tank.   The levitation separation component discharge means comprises at least an overflow drain port formed in an upper part of the secondary storage tank, and a drain reservoir to which a discharge pipe is attached. The dust remover of any one of 1-4.   The dust removing device according to claim 9, wherein a rake for scraping the floating separation component toward the overflow drainage port is provided at an upper portion in the secondary storage tank.   The dust removing device according to claim 10, wherein an upper space in the primary storage tank and an upper space of the secondary storage tank are communicated with each other.   The dust removing device according to claim 11, wherein a pressurized water inlet for injecting pressurized water containing air bubbles is provided in a lower portion of the secondary storage tank.   The dust removal apparatus according to claim 12, wherein the stored water in the primary storage tank is used as the pressurized water.   The dust remover according to any one of claims 1 to 13, wherein a strainer is interposed downstream of the circulating pump of the circulating water discharge pipe. The dust removing device according to claim 1, wherein a chemical injection port is provided in the secondary storage tank.   The dust removal apparatus according to any one of claims 1 to 15, wherein the untreated gas is a gas generated by an organic fuel gasification furnace. Biomass comprising a furnace body, biomass supply means for supplying biomass into the furnace body, and oxidant supply means for supplying an oxidizing agent for combustion made of oxygen or a mixture of oxygen and water vapor into the furnace body A gasifier,
Separation means for removing dust in the product gas gasified in the biomass gasification furnace;
The dust removing apparatus according to any one of claims 1 to 16 , wherein the gas from which dust having a relatively large particle diameter of 3 µm or more has been removed by the separating means is further precisely removed .
A gas refining device for refining the highly dust-removed gas;
An organic fuel gasification system comprising: Biomass comprising a furnace body, biomass supply means for supplying biomass into the furnace body, and oxidant supply means for supplying an oxidizing agent for combustion made of oxygen or a mixture of oxygen and water vapor into the furnace body A gasifier,
Separation means for removing dust in the product gas gasified in the biomass gasification furnace;
The dust removing apparatus according to any one of claims 1 to 16 , wherein the gas from which dust having a relatively large particle diameter of 3 µm or more has been removed by the separating means is further precisely removed .
A gas refining device for refining the highly dust-removed gas;
A liquid fuel synthesizer equipped with a distillation device for synthesizing methanol using the purified gas and separating it into exhaust gas and methanol;
Comprising a liquid fuel production system using an organic fuel.

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