WO2005063923A1

WO2005063923A1 - Carbonization apparatus for producing activated carbon

Info

Publication number: WO2005063923A1
Application number: PCT/JP2004/016681
Authority: WO
Inventors: Ikuyoshi Kohchi; Tadashi Yokoi
Original assignee: Intellectual Property Bank Corp.
Priority date: 2003-12-08
Filing date: 2004-11-10
Publication date: 2005-07-14
Also published as: JPWO2005063923A1; WO2005063923B1; RU2006124520A; RU2328517C2; US20070101912A1; CN1890349A

Abstract

A carbonization apparatus (10) for producing an activated carbon wherein an organic based material to be treated is carbonized, which comprises a carbonization furnace (40) wherein overheated steam is introduced to carbonize a material to be treated and the spent steam is discharged, a drying furnace (30) wherein the steam discharged from the carbonization furnace (40) is introduced to dry the material to be treated and the spent steam is discharged, a high temperature steam generating device (60) wherein steam is introduced and the high temperature overheated steam for use in supplying to the carbonization furnace (40) is formed, a deodorizing furnace (70) wherein impurities contained in the spent steam discharged from the drying furnace (30) are heated to deodorize them through burning and discharging a high temperature an exhaust gas is discharged, and a waste heat boiler (80) wherein water is heated by using the high temperature exhaust gas discharged from the deodorizing furnace (70) and the steam for supplying to the high temperature steam generating device (60) is formed. The carbonization apparatus allows the production of an activated carbon having high quality at a low cost, by recovering and reutilizing the heat contained in the exhaust gas which has been discharged from a deodorizing furnace and has been subjected to a burning treatment.

Description

Specification

Carbonization equipment for activated carbon production

Technical field

The present invention relates to a carbonization apparatus for producing activated carbon, which performs a carbonization treatment such as drying, carbonization, and activation on an organic treatment target such as garbage, wood, meat-and-bone meal, clothing waste, and plastics.

Background art

[0002] Conventionally, waste characterized by exposing waste mainly composed of one or more of garbage, waste wood, and disposable diapers to high-temperature steam at 510 to 900 ° C in an oxygen-free state to carbonize the waste. Methods of processing objects are known. According to the waste treatment method, it is possible to efficiently carbonize the waste by exposing the waste to high-temperature steam for a predetermined time to reduce the volume or weight to about 1/100 of that before treatment. (For example, see Patent Document 1.)

[0003] Conventionally, when carbonization or the like is obtained by dry-distilling an organic waste such as beer lees or the like, a heat treatment chamber supply port is provided at one end of a heat treatment chamber extending from one end to the other end, A product outlet and an exhaust gas outlet are provided at the other end of the heat treatment chamber, a hot air inlet is provided in the heat treatment chamber, and a large number of stirring blades for stirring the object to be heat-treated are attached at intervals in the axial direction. A shaft is rotatably provided by extending from one end to the other end inside the heat treatment chamber, and the stirring blade is attached to the stirring shaft in a direction for stirring the object to be heat-treated and directed to the product discharge port side. A heat treatment apparatus for organic waste or the like, which is characterized by the above, is known.

[0004] In the organic waste heat treatment apparatus, organic waste such as beer lees is supplied from the raw material supply port of the heat treatment apparatus into the heat treatment chamber and reaches the product discharge port. The raw materials are forcibly agitated by the rotation of a large number of paddles and the like attached to the agitating shaft rotating in the heat treatment chamber, and are mixed well while being sent to the product outlet side, and the solid surface is updated as needed. Then, it flows into the heat treatment chamber from the hot air inlet provided in the heat treatment chamber. For example, uniform contact with high-temperature hot air of about 650 (° C) and good gas-solid contact promote mass and heat transfer, and heat treatment, which is a carbonization (carbonization) action of solids, is performed. It must be performed uniformly and produce products such as homogeneous carbides. Bets are to be possible (for example, see Patent Document 2.) ₀

[0005] Conventionally, a method of carbonizing and converting organic waste into a raw material to produce a carbide has been proposed in which heat energy of exhaust steam discharged after overheating an organic compound is used as a heat source for generating steam. A method for producing a possible carbide is known (for example, see Patent Document 3).

Patent Document 1: JP-A-2000-313884 (Pages 1-3, Fig. 1)

Patent Document 2: JP-A-10-237453 (Pages 1, 2, 9; Fig. 1)

Patent Document 3: JP-A-2001-192670 (Pages 2, 5 and 1)

Disclosure of the invention

Problems to be solved by the invention

[0006] In the waste treatment method described in Patent Document 1, the volume or weight is reduced to about 1/100 of that before treatment by exposing the waste to high-temperature steam for a predetermined time, thereby efficiently carbonizing the waste. It is possible to make it. However, exhaust gas generated during the carbonization process of waste is cooled by a cooler and separated into liquefied and gaseous components.

[0007] This gas component is transmitted through a deodorizer filled with an adsorbent such as activated carbon and then discharged into the atmosphere using an exhaust fan, or this gas is recovered and reused in boiler fuel and the like. Although it can be used, it does not directly recover the heat energy of the exhaust gas, so that a large amount of heat energy is wasted into the atmosphere by a cooler without being reused. Therefore, there has been a problem that high-quality carbide cannot be produced at low cost.

[0008] In the high-temperature heat treatment apparatus for organic waste and the like described in Patent Document 2, contact with a large number of hot air jet nozzles provided by hot air jet nozzles is performed uniformly, and good gas-solid contact is achieved. By performing the heat treatment, it is considered that the heat treatment of the solid can be made uniform as a whole. However, since high-temperature steam flows into the rotating shaft, the structure becomes complicated, and there is a problem in durability of the seal portion. In addition, even if hot air is blown out from the nozzle near the product outlet located at the final stage of organic waste treatment, water vapor containing a large amount of impurities in the previous process is also mixed! A problem of not being able to generate carbides. [0009] Further, in the method for producing a carbide described in Patent Document 3, when a gaseous component or a liquid component of exhaust steam contains useful components, these components are collected and reused. Specifically, as described in paragraph No. 0056 and thereafter, a separation and recovery device separates exhaust steam into gas and liquid to collect impurities or useful substances such as useful substances in the exhaust steam, The heat energy in the exhaust steam of the high-temperature gas after the matter is separated is used as a heat source for generating steam.

[0010] However, in this method for producing carbide, only the heat energy in the exhaust steam is recovered, and thus the amount of heat to be recovered is not so large. In addition, impurities and odors contained in the exhaust steam may be emitted from the pyrolysis unit.

[0011] In view of the above-mentioned conventional situation, the present invention provides low-cost, high-quality, high-quality products by combusting the entire amount of exhaust steam in a deodorizing furnace and directly collecting and reusing the retained heat in a waste heat boiler. It is an object of the present invention to provide a carbonization apparatus for producing activated carbon capable of producing high-quality activated carbon.

Means for solving the problem

[0012] In order to solve the above-mentioned problems, the present invention provides a carbonization treatment such as drying, carbonization, and activation by heating organic treatment objects such as garbage, wood, meat-and-bone meal, clothing waste, and plastics with steam. Dry carbonizing furnace that introduces superheated steam to dry and carbonize the object to be treated and discharges used steam, and dry carbonization by introducing steam A high-temperature steam generator that generates high-temperature superheated steam to be supplied to the furnace, and a deodorizer that heats and deodorizes and burns the impurities contained in the used steam discharged from the dry carbonization furnace to discharge high-temperature exhaust gas. It is equipped with a furnace and a waste heat boiler that heats water using high-temperature exhaust gas discharged from the deodorizing furnace to generate steam to be supplied to the high-temperature steam generator.

[0013] In order to solve the above problems, a carbonization apparatus for producing activated carbon according to the present invention includes a carbonization furnace that introduces superheated water steam to carbonize an object to be treated and discharge used steam, A drying furnace that introduces steam discharged from the furnace to dry the object to be treated and discharges used steam, and a high-temperature steam generator that introduces steam and generates high-temperature superheated steam to be supplied to the carbonization furnace Contained in the used steam discharged from the drying oven. Deodorizing furnace that heats impurities and deodorizes and burns to discharge high-temperature exhaust, and heats water using high-temperature exhaust discharged from the deodorizing furnace to generate water vapor to be supplied to the high-temperature steam generator. And a waste heat boiler.

[0014] In order to solve the above-mentioned problems, a carbonization apparatus for producing activated carbon according to the present invention includes a carbonization-promoting furnace that introduces superheated steam to promote carbonization of an object to be treated and discharge used steam. Introduces steam discharged from the carbonization promoting furnace to carbonize the object to be treated and discharges used steam, and introduces steam discharged from the carbonizing furnace to dry the object to be used. Drying steam that discharges used steam, a high-temperature steam generator that generates high-temperature superheated steam that is supplied to the carbonization promotion furnace by introducing steam, and removes impurities contained in the used steam discharged from the drying furnace. A deodorizing furnace that heats and deodorizes and burns to discharge high-temperature exhaust gas, and a waste heat boiler that uses the high-temperature exhaust gas discharged from the deodorizing furnace to heat water and generate steam to be supplied to a high-temperature steam generator And characterized by having I do.

[0015] In order to solve the above-mentioned problems, a drying furnace, a carbonization furnace, a dry carbonization furnace, or a carbonization promotion furnace of a carbonization apparatus for producing activated carbon according to the present invention includes a processing object supply port for supplying a processing object and a processing object. A cylindrical shell having a cylindrical portion for stirring and moving an object, an outlet for discharging the object to be processed, and a steam inlet for introducing superheated steam or used steam in a direction tangential to the inner surface of the cylinder, and a cylindrical shell; And a rotatable stirring blade for stirring and moving the object to be processed.

[0016] In order to solve the above-mentioned problem, a steam inlet provided in a cylindrical shell of the carbonization device for producing activated carbon according to the present invention is provided with a superheated steam or a used steam in the same direction as the rotation direction of the stirring blade. It is characterized by a steam inlet that is introduced tangentially to the inner surface of the cylinder.

Further, the present invention is characterized in that a plurality of steam inlets are provided in the cylindrical shell of the carbonizing apparatus for producing activated carbon according to the present invention.

[0017] In order to solve the above problems, the cylindrical shell of the carbonizing apparatus for producing activated carbon according to the present invention is characterized in that the used steam after heating the object to be treated in the cylindrical shell is transferred from the inner surface of the cylindrical portion to the outer side of the cylindrical portion. To provide a water vapor outlet for discharging tangentially to the inner surface of the cylindrical part Features.

[0018] In order to solve the above-mentioned problems, a carbonization apparatus for producing activated carbon according to the present invention is characterized in that the flow rate of superheated steam or used water vapor supplied to a drying furnace, a carbonization furnace, a dry carbonization furnace or a carbonization promotion furnace is controlled. It is characterized by having a pressure adjusting mechanism or a throttle that adjusts to 5 to 20 (mZs).

The invention's effect

[0019] According to the present invention, a dry carbonizing furnace that introduces superheated steam to dry and carbonize the object to be treated and discharges used steam is provided. A high-temperature steam generator that generates warm superheated steam, a deodorizing furnace that heats impurities contained in the used steam discharged from the dry carbonization furnace, deodorizes and burns, and discharges high-temperature exhaust gas, and a deodorizing furnace Powered by a waste heat boiler that heats water using the discharged high-temperature exhaust gas to generate steam to be supplied to the high-temperature steam generation device, the heat contained in the high-temperature exhaust gas discharged from the deodorization furnace is removed. It can be reused. In addition, since the reused heat is supplied to the high-temperature steam generator, high-temperature superheated steam can be easily generated at low cost. By reacting the high-temperature superheated steam generated by the high-temperature steam generator with the object to be treated, high-quality activated carbon can be produced at low cost. In addition, since a deodorizing furnace is provided in the carbonization device for the production of activated carbon, it is possible to discharge exhaust gas that meets the environmental standards with a low content of dioxins.

[0020] According to the present invention, the drying furnace, the carbonizing furnace, the dry carbonizing furnace or the carbonization promoting furnace of the carbonizing apparatus for producing activated carbon is provided with a processing object supply port for supplying the processing object and a stirring and transfer of the processing object. A cylindrical shell having a cylindrical part to be moved, an outlet for discharging the object to be treated, and a steam inlet for introducing superheated steam or used water vapor in a direction tangential to the inner surface of the cylindrical part, and a cylindrical shell. A rotatable stirring blade for stirring and moving the object to be processed is provided, so that the superheated steam is spirally wound and easily comes into contact with the object to be processed, and the object to be processed is exposed to the high-temperature superheated steam for a long time. Accordingly, reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced.

According to the present invention, one or more steam inlets provided in the cylindrical shell of the carbonization device for producing activated carbon are provided with superheated steam or used steam for rotating the stirring blade. Since the steam inlet is introduced in the tangential direction of the inner surface of the cylinder in the same direction as the direction, the object to be treated is exposed to high-temperature superheated steam for a long time. Accordingly, reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced.

Further, by providing a plurality of steam inlets in the cylindrical shell, the swirling flow of the superheated steam is further strengthened, and it becomes possible to promote reactions such as drying, carbonization, dry distillation, and activation of the object to be treated.

Further, according to the present invention, the cylindrical shell of the carbonization device for producing activated carbon is configured to transfer the used steam after heating the object to be treated in the cylindrical shell from the inner surface of the cylindrical portion to the outer side of the cylindrical portion, to the inner surface of the cylindrical portion. The superheated steam is spirally wound and easily comes into contact with the object to be treated because the steam outlet for discharging in the tangential direction is provided. Therefore, the object to be treated is exposed to high-temperature superheated steam for a long time, and reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced.

Further, according to the present invention, the flow rate of superheated steam or used steam supplied to a drying furnace, a carbonizing furnace, a dry carbonizing furnace or a carbonization promoting furnace of a carbonizing apparatus for producing activated carbon is set to 5 to 20 (m / s), the steam is moved inside the reactor while maintaining a relatively high relative velocity with the substance to be treated with a swirling flow to some extent. The transfer of heat is promoted, the temperature of the object to be treated approaches the temperature of steam, and various reactions such as drying, carbonization, carbonization, and activation are promoted. Therefore, high quality activated carbon can be produced in a short time.

Brief Description of Drawings

FIG. 1 is an overall configuration diagram of a carbonizing apparatus for producing activated carbon according to the present invention.

FIG. 2 is a view showing a state in which a plurality of steam inlets for supplying superheated steam are provided in a carbonization furnace.

Explanation of symbols

[0025] 10 Carbonization equipment for activated carbon production

20 Object supply means

22 Hopper

24 conveyor feeder

drying furnace

Cylindrical shell

Processing object supply port

Cylindrical part

Stirring blade

Vent

Steam inlet

Water vapor outlet

Carbonization furnace

Cylindrical shell

Processing object supply port

Cylindrical part

Stirring blade

Vent

, 46A, 46B, 46C… Steam inlet Steam outlet

Discharge device

Cooling jacket

Product tank

Screw conveyor

High temperature steam generator

Blower

LPG cylinder

Governor

Pana

Deodorizing furnace

Deodorizing furnace blower 74 kerosene tank

76 Kerosene pump

80 Waste heat boiler

90 Water supply device

92 Water softener

94 Soft water tank

95 Water pump

96 Dust collector

98 exhaust stack

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, a carbonization device for producing activated carbon according to the present invention will be described with reference to the drawings.

Example 1

FIG. 1 is an overall configuration diagram of a carbonization device for producing activated carbon according to the present invention. As shown in FIG. 1, an activated carbon production carbonization apparatus 10 stores organic wastes such as garbage, wood, meat-and-bone meal, clothing waste, plastics, and the like, and appropriately places the wastes in a drying oven 30. A supply unit 20 for supplying the processing object to be supplied; a drying furnace 30 for introducing the steam discharged from the carbonization furnace 40 to dry the processing object to discharge the dried processing object and the used steam; and a drying furnace. A carbonization furnace 40 for supplying the object to be dried at 30 and introducing superheated steam from the high-temperature steam generator 60 to carbonize the object to be treated to discharge carbonized activated carbon and used steam; A discharge device 50 for cooling and storing the activated carbon carbonized in the furnace 40 is provided.

[0028] Further, the activated carbon production carbonization device 10 is provided with a high-temperature steam generation device 60 that introduces steam from the waste heat boiler 80 to generate high-temperature superheated steam to be supplied to the carbonization furnace 40, and a drying furnace 30 that is discharged. The deodorizing furnace 70, which heats the impurities contained in the used steam to deodorize and burn and discharges high-temperature exhaust gas, and heats the water using the high-temperature exhaust gas discharged from the deodorizing furnace 70 to the high-temperature steam generator 60 A waste heat boiler 80 that generates steam for supply, a water supply device 90 that supplies water to the waste heat boiler 80, and an exhaust gas that is subjected to heat exchange in the waste heat boiler 80 after being discharged from the deodorization furnace 70 Dust and water contained in A dust collecting device 96 that collects dust and makes it odorless and smokeless, and an exhaust pipe 98 that discharges exhaust gas after collecting dust to the atmosphere are provided.

[0029] The processing object supply means 20 includes a hopper 22 for storing organic processing objects such as garbage, wood, meat and bone meal, clothing waste, and plastics, and a processing object stored in the hopper 22. And a feeder 26 that supplies the object to be processed to the drying furnace 30.

[0030] The cylindrical shell 31 of the drying furnace 30 has a processing object supply port 32 for supplying the processing object measured by the feeder 26, a cylindrical portion 33 for stirring and moving the processing object while drying and carbonizing the processing object. One or more rotatable stirring blades 34 such as a propeller feeder for drying and carbonizing the object to be processed in the cylindrical shell 31 and an outlet for discharging the dried and carbonized object to be processed. 35, and a steam inlet 36 for introducing the used steam discharged from the carbonization furnace 40 into the cylindrical portion 33 in a tangential direction (tangential direction) on the inner surface of the cylinder in the same direction as the rotation direction of the stirring blade 34. In addition, a steam outlet 37 is provided to discharge the used steam from the inside of the cylindrical part 33 to the outside of the cylindrical part 33 in the tangential direction (tangential direction) of the inside of the cylindrical part 33 after heating the object to be treated in the cylindrical shell 31. ing.

[0031] The cylindrical shell 41 of the carbonization furnace 40 has a processing object supply port 42 for supplying the dried processing object discharged from the discharge port 35 of the drying furnace 30, and a carbonization and carbonization of the processing object. A cylindrical portion 43 for stirring and moving while being activated, and one or more rotatable screw-type conveyors for stirring and moving while subjecting the object to be treated to carbonization, carbonization and activation in a low oxygen state in the cylindrical shell 41, Stirring blades 44 such as a propeller feeder, an outlet 45 for discharging the carbonized, carbonized and activated material to be treated, and a 900-1200 (° C) superheated steam discharged from the high-temperature steam generator 60 43 The external force is also applied to the steam inlet 46 for introducing the tangential direction (tangential direction) to the inner surface of the cylinder in the same direction as the rotation direction of the stirring blades 44, and the used steam after heating the object to be treated in the cylindrical shell 41. Cylindrical part 43 Cylindrical from inner surface to outer part of cylindrical part Is provided steam outlet 4 7 for discharging the 43 inner surface of the tangential (Tanji Nsharu direction).

[0032] The flow rate of superheated steam or used steam supplied to the drying furnace 30, the carbonization furnace 40, the drying carbonization furnace or the carbonization promotion furnace is 5 (mZs) or more in order to promote heat transfer to the object to be treated. It is desirable that the flow rate be as follows. However, if it is set to 20 (mZs) or more, a problem such as erosion occurs in parts used inside the drying furnace 30 or the like, so that there is an appropriate flow velocity range. The flow rate of the superheated steam is set by adjusting the flow rate of the combustion air supplied to the high-temperature steam generator 60, the supply amount of the LPG gas, and the opening areas of the steam inlets 36 and 46 by a pressure adjusting mechanism or a throttle. .

FIG. 2 is a view showing a state in which a plurality of steam inlets for supplying superheated steam to the carbonization furnace are provided.

Although FIG. 1 illustrates an example in which one steam inlet 46 is provided in the carbonization furnace 40, as shown in FIG. 2, a plurality of steam inlets 46, 46A, 4B6, and 46C may be provided in the carbonization furnace 40. Good. Each of these steam inlets 46, 46A, 46B, and 46C is used to supply superheated steam discharged from the high-temperature steam generator 60 to the cylindrical inner surface tangential direction (tan tangent) in which the outer force of the cylindrical portion 43 is the same as the rotation direction of the stirring blade 44. Char direction).

[0034] In the carbonization step when producing activated carbon, it is important to heat the object to be treated to a high temperature in a homogeneous state. As shown in Fig. 1, the purpose of drying and carbonizing can be achieved to some extent by intensively introducing superheated steam from one steam inlet 36 or 46 provided in the carbonizing furnace 40 or the drying furnace 30. . However, since the stirring blades 34 and 44 and the object to be treated are present inside the cylindrical shells 31 and 41, the flow of the superheated steam is obstructed, and the swirling flow may be weakened.

[0035] Therefore, by providing a plurality of steam inlets 46A, 46B, 46C at an intermediate position of the cylindrical shell 41, the flow of the superheated steam can be made close to the original strong and swirling flow state. However, if the number of steam inlets is increased more than necessary, the power of the superheated steam flow per steam inlet may be weakened and the swirling flow of the superheated steam may be weakened.

[0036] As in the case of the carbonization furnace 40, a plurality of steam inlets may be provided in the drying furnace 30, the drying carbonization furnace, or the carbonization promotion furnace. Furthermore, the flow area and flow rate of the superheated steam to be supplied may be set by adjusting the opening area of each steam inlet through a pressure adjusting mechanism or a throttle.

[0037] The discharge device 50 includes a cooling jacket 52 that cools the high-temperature activated carbon carbonized and activated in the carbonization furnace 40 with water, and a water-cooled jacket that cools the activated carbon and sends it to the product tank 54 while cooling. A screw conveyor 56 with a slot is provided.

[0038] The high-temperature steam generator 60 generates superheated steam by burning steam from the waste heat boiler 80 into an atmosphere by burning LPG or the like with a wrench. The superheated steam generated by the high-temperature steam generator 60 is supplied to the carbonization furnace 40, where the object to be treated is carbonized, carbonized and activated to generate activated carbon.

[0039] The deodorizing furnace 70 supplies the used steam discharged from the carbonization furnace 40 into a combustion atmosphere such as a petroleum wrench, so that ammonia, mercaptan, hydrogen sulfide, and methyl sulfide contained in the used steam are supplied. It deodorizes and burns impurities such as methyl disulfide, trimethylamine, acetoaldehyde, and styrene, and emits high-temperature exhaust.

[0040] The waste heat boiler 80 generates water vapor (dry steam) by heating water in multiple stages using high-temperature exhaust gas discharged from the deodorizing furnace 70, and supplies the water vapor to the high-temperature steam generator 60.

[0041] The dust collection device 96 collects dust (solid matter, etc.) and moisture contained in the exhaust gas after heat exchange in the waste heat boiler 80 after being discharged from the deodorizing furnace 70, by using a cyclone or the like. At the same time, a process for making smokeless is performed. Further, the exhaust stack 98 emits clean exhaust air after dust collection to the atmosphere.

Example 2

[0042] In the above embodiment, the organic processing object is dried using two types of reaction furnaces, the drying furnace 30 (first reaction furnace) and the carbonization furnace 40 (second reaction furnace). Although the carbonization apparatus for producing activated carbon that performs carbonization such as dry distillation and activation has been described, the present invention is not limited to an example in which carbonization is performed using two types of reactors.

For example, high-temperature exhaust gas discharged from the deodorizing furnace 70 is used to generate high-temperature superheated steam using the heat-recovered superheated steam in accordance with the type and amount of the processing object, and the high-temperature superheated steam is generated. The object of the present invention is achieved even when the steam is introduced into a dry carbonization furnace (first reaction furnace) to dry the object to be treated and carbonized, and the used steam is discharged. Is possible.

[0044] In addition, a carbonization promoting furnace (third reaction furnace) that introduces superheated steam to promote carbonization of the object to be treated and discharges used steam and a steam that is discharged from the carbonization promoting furnace are introduced. A carbonization furnace (second reactor) that carbonizes the object to be treated and discharges used steam; A drying furnace (first reactor) that introduces steam discharged from the carbonization furnace to dry the object to be treated and discharges used steam, and a high-temperature furnace for introducing steam and supplying it to the carbonization furnace. A high-temperature steam generator that generates superheated steam, a deodorizing furnace that heats impurities contained in the used water vapor discharged from the drying furnace, burns it by deodorization, and discharges high-temperature exhaust gas, and a deodorizing furnace power is discharged. Waste heat boiler that heats water using high-temperature exhaust gas to generate steam to be supplied to a high-temperature steam generator, and uses a multistage reactor in cascade to carbonize the object to be treated The purpose of the present invention can also be achieved as a carbonizing device for production.

Hereinafter, a method for producing activated carbon using the activated carbon production carbonization device 10 will be described. First, the deodorizing furnace blower 72 is operated to supply combustion air to the deodorizing furnace 70. Next, kerosene is supplied from the kerosene tank 74 to the deodorizing furnace 70 using the kerosene pump 76 to start combustion. Exhaust gas of 800 to 1200 (° C) is discharged from the deodorizing furnace 70, and the high-temperature exhaust gas is supplied to the waste heat boiler 80.

When the temperature of the waste heat boiler 80 rises, the soft water stored in the soft water tank 94 via the water softener 92 of the water supply device 90 is pumped by the feed water pump 95 to be supplied to the waste heat boiler 80. You. In the latter stage of the waste heat boiler 80, the supplied soft water is heated to a high temperature. Then, the steam is further supplied to a stage preceding the waste heat boiler 80 to generate superheated steam (dry steam) of 150 to 300 (° C.) and supplied to the high-temperature steam generator 60.

In the high-temperature steam generator 60, the blower 62 is operated to supply combustion air to the high-temperature water steam generator 60. Next, in order to heat the steam, the LPG is supplied from the LPG cylinder 64 to the parner 68 via the governor 66 and ignited. Then, the steam of 150 to 300 (° C) introduced from the waste heat boiler 80 is further heated to generate superheated steam of 700 to 1200 (° C) (more preferably, 900 to 1100 (° C)). And supply it to the carbonization furnace 40.

On the other hand, organic processing objects such as garbage, wood, meat-and-bone meal, clothing waste, and plastics, which are the source of activated carbon, are put into the hopper 22 of the processing object supply means 20 in advance and stored. Please. The processing object stored in the hopper 22 is supplied to the feeder 26 by the conveyor 24 provided in the processing object supply means 20. The feeder 26 appropriately removes a predetermined amount of Metering into drying oven 30.

[0049] The processing object supply port 32 provided in the cylindrical shell 31 of the drying furnace 30 is also supplied to the inside of the cylindrical shell 31 with the processing object. Since the stirring blade 34 rotates inside the cylindrical shell 31, the object to be treated gradually moves toward the discharge port 35 while being stirred in the cylindrical portion 33 in the cylindrical shell 31.

[0050] From one or a plurality of steam inlets 36, used 700-1000 (° C) steam discharged from the carbonization furnace 40 is supplied to the cylindrical part 33 and the stirring blade 34 has an external force. It is introduced in the tangential direction (tangential direction) of the inner surface of the cylinder in the same direction as the rotation direction, and generates a strong vortex. Therefore, the steam performs a reaction such as thermal decomposition or hydrolysis while being well mixed with the object to be processed which is being stirred and moved by the stirring blade 34.

[0051] The object to be treated by the superheated steam proceeds through the cylindrical portion 33 toward the steam discharge port 37 while performing the reactions of heating, drying and carbonization, and the used steam is transferred from the inner surface of the cylindrical portion 33 to the outside of the cylindrical portion. 33 It is discharged in the tangential direction (tangential direction) of the inner surface. Here, too, the steam outlet 37 is provided so that the used steam is discharged in the tangential direction of the inner surface of the cylindrical part 33, so that the swirling flow of the steam in the cylindrical part 33 is maintained and the relative flow rate with the object to be treated is maintained. Keeps high and promotes heat transfer.

Conventionally, when supplying steam to a drying furnace or the like, a large number of thin pipes for introducing the steam are provided inside the drying furnace or the like, and the large number of pore forces are blown out to the object to be treated. There was a device to hit. However, such a large number of pore forces also have the following disadvantages in a device for ejecting steam.

In general, a stirrer for stirring and feeding a cake occupies most of the inner space of the reactor inside the reaction furnace, so that it is difficult to feed a pore nozzle for steam ejection. There was a problem. Therefore, as described above, a complicated structure in which a steam passage is provided in the shaft of the stirrer and steam is ejected from the shaft portion of the stirrer to promote the reaction of the object to be treated is also known.

[0054] When steam is flowed in parallel with the central axis of the cylindrical reactor, the steam passes through the inside of the reactor, and heat transfer and reaction to the object to be treated do not effectively proceed. ! / ヽ and ヽぅ cause problems. Therefore, in the present invention, steam is introduced from the outside of the cylindrical portions 33 and 43 at a flow rate of 5 to 20 (m / s) in the tangential direction of the inner surface of the cylinder in the same direction as the rotation direction of the stirring blades 34 and 44. To generate strong vortices of water vapor. This water vapor is blown from the side at a flow rate of 5 to 20 (m / s) in the circumferential tangential direction near the discharge ports 35 and 45 of the products in the cylindrical sections 33 and 44, and the processing object supply port 32 and Water is discharged from the water vapor discharge ports 37 and 47 provided near the inlet 42 in the circumferential tangential direction in the same rotational direction as the stirring blades 34 and 44.

[0056] With this structure, the water vapor moves in the reaction furnace while maintaining a large relative velocity with the substance to be processed with a swirling flow to some extent, so that heat transfer to the object to be processed is promoted. As a result, the temperature of the processing object approaches the temperature of steam, and various reactions such as drying, carbonization, carbonization, and activation are promoted.

The object dried in the drying furnace 30 is discharged from the discharge port 35 and supplied to the carbonization furnace 40 in the next processing step.

The object to be processed discharged from the drying furnace 30 is supplied to the inside of the cylindrical shell 41 from a processing object supply port 42 provided in the cylindrical shell 41 of the drying furnace 40. Since the stirring blades 44 rotate inside the cylindrical shell 41, the object to be treated gradually moves toward the discharge port 45 while being stirred in the cylindrical portion 43 in the cylindrical shell 41.

The superheated steam supplied from the high-temperature steam generator 60 is supplied from one or a plurality of steam inlets 46, 46,... To the cylindrical inner surface in the same direction as the rotation direction of the stirring blade 44 with respect to the external force of the cylindrical portion 43. It is introduced in the linear direction (tangential direction) to generate a strong swirling flow of water vapor. Therefore, the superheated steam mixes and reacts well with the treatment object stirred and moved by the stirring blades 44, and moves the cylindrical portion 43 toward the steam discharge port 47 while heating, carbonizing, carbonizing, and activating the treatment object. The used steam is discharged from the inner surface of the cylindrical portion 34 to the outside of the cylindrical portion in the tangential direction (tangential direction) of the inner surface of the cylindrical portion 43.

[0059] Also in this case, since the steam outlet 47 is provided so that the used steam is discharged in the tangential direction of the inner surface of the cylindrical portion 43, a reaction such as thermal decomposition or hydrolysis is performed while mixing well with the object to be treated. Promoted. In order to produce high quality activated carbon, it is desirable to keep the object to be treated at a high temperature of 800 (° C) or higher. Further, in order to do this without by-products of dioxins, the object to be treated is exposed to high-temperature superheated steam in which almost no oxygen is present. Is ideal.

[0060] By supplying superheated steam at a high temperature of 700 to 1200 (° C) to the carbonization furnace 40 and reacting with the object to be treated, high-quality activated carbon can be generated in a short time. Furthermore, in the present invention, the steam supplied to the high-temperature steam generator 60 is superheated by recovering the heat contained in the high-temperature exhaust gas after the deodorization treatment of the steam containing impurities used in the drying furnace 30. It is possible to reduce the production cost of the activated carbon.

The activated carbon produced as a result of carbonization and activation in the carbonization furnace 40 is discharged from the discharge port 45 and supplied to the discharge device 50.

[0061] If the high-temperature activated carbon discharged from the carbonization furnace 40 is placed in an oxygen atmosphere, there is a danger of ignition. Therefore, the activated carbon is cooled by the cooling jacket 52 provided in the discharge device 50. Furthermore, the activated carbon is sent to the product tank 54 while being cooled by the screw conveyor 56 with a water cooling jacket, and stored.

[0062] On the other hand, the used steam discharged from the drying furnace 30 has a temperature of 340 to 740 (° C). Since the used steam contains harmful substances such as nitrogen compounds and odors, it is necessary to complete the combustion of the impurities at a high temperature in the deodorization furnace 70. In addition, even if burned at a temperature of 800 (° C) or less, dioxins are generated, so it is necessary to burn in a higher temperature environment. Therefore, in the deodorizing furnace 70, the used steam containing the harmful substances is heated to a temperature of 800 to 1200 (° C), decomposed and discharged.

Conventionally, the used steam discharged from the deodorizing furnace 70 is directly sent to the dust collector 96 and discharged from the exhaust stack 98 to the atmosphere. Heat recovery is performed when Therefore, it is possible to save energy consumption when producing high quality activated carbon. In addition, since the exhaust gas after heat exchange in the waste heat boiler 80 is 100 to 400 (° C), it is possible to realize a considerable amount of heat recovery.

[0064] In order to generate high-temperature steam exceeding 1000 (° C) with a normal boiler / super heater, heat transfer tubes and pipes made of a special alloy for ultra-high temperature are required. In addition, there are structural difficulties in terms of durability and manufacturing equipment construction costs. Therefore, as in the present invention, the superheated steam of 150 to 300 (° C) obtained by heat exchange of the high-temperature exhaust gas discharged from the deodorization furnace 70 is used. By supplying high-temperature steam to the high-temperature steam generator 60 using ceramics in the high-temperature section, the production cost of the carbonization device for the production of activated carbon can be reduced and running can be achieved by heat recovery. Costs can also be reduced.

[0065] The exhaust gas after performing heat exchange in the waste heat boiler 80 is supplied to a dust collector 96, and dust and moisture contained in the exhaust gas are collected using a cyclone or the like. The exhaust after dust collection is released to the atmosphere from the stack 98.

Industrial applicability

[0066] According to the carbonizing apparatus for producing activated carbon according to the present invention, since the heat contained in the exhaust gas discharged from the deodorizing furnace is reused, high-temperature superheated steam can be easily generated. By reacting the high-temperature superheated steam with the object to be treated, high-quality activated carbon can be produced at low cost.

According to another aspect of the invention, in a drying furnace, a carbonization furnace, a dry carbonization furnace, or a carbonization promotion furnace of a carbonization device for producing activated carbon, steam is introduced from outside the cylindrical portion in a tangential direction to the inner surface of the cylinder. Since the cylindrical shell having the steam inlet is provided, the superheated steam comes into contact with the processing object by a high-speed swirling flow, heat transfer to the processing object sufficiently proceeds, and the entire processing object reaches a high temperature. Therefore, reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced.

[0068] According to another aspect of the invention, one or more steam inlets provided in a cylindrical shell of a drying furnace, a carbonization furnace, a dry carbonization furnace, or a carbonization promotion furnace of a carbonization device for producing activated carbon supply steam. Since the shape is such that it is introduced in the tangential direction of the inner surface of the cylinder in the same direction as the rotation direction of the stirring blade, it flows through the cylindrical shell with a strong swirling flow and contacts the object to be treated with sufficient time and relative speed. Accordingly, reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced.

[0069] According to another aspect of the present invention, the cylindrical shell of the carbonization device for producing activated carbon is provided with a water vapor discharge port for discharging used water vapor in a tangential direction of the inner surface of the cylindrical portion. The flow is maintained, the flow velocity relative to the object to be treated is kept high, and the heat transfer is promoted. Therefore, the object to be treated is exposed to high-temperature superheated steam for a long time, and reactions such as drying, carbonization, carbonization, and activation are promoted, and high-quality activated carbon can be produced. Further, according to the present invention, the flow rate of superheated steam or used steam supplied to the drying furnace, the carbonizing furnace, the dry carbonizing furnace or the carbonization promoting furnace of the carbonizing apparatus for producing activated carbon is adjusted to 5 to 20 (m / s). Since the water vapor moves in the reactor while maintaining a relatively high velocity relative to the substance to be treated with a swirling flow to some extent, the transfer of heat to the object to be treated is promoted. In addition, the temperature of the object to be treated approaches the temperature of steam, and various reactions such as drying, carbonization, carbonization, and activation are promoted. Therefore, high quality activated carbon can be manufactured in a short time.

Claims

The scope of the claims

[1] In an activated carbon manufacturing carbonization device that heats organic processing objects such as garbage, wood, meat and bone powder, clothing waste, and plastics with steam to perform carbonization such as drying, carbonization, and activation,

A dry carbonization furnace that introduces superheated steam to dry and carbonize the object to be treated, and discharges used steam;

A high-temperature water steam generator that generates high-temperature superheated steam to be supplied to the dry carbonization furnace by introducing steam,

Dry decarburizing furnace power Deodorizing furnace that heats and deodorizes and burns the impurities contained in the used steam that has been discharged, and discharges high-temperature exhaust gas.

Deodorizing furnace power A waste heat boiler that heats water using the discharged high-temperature exhaust gas to generate steam to be supplied to a high-temperature steam generator,

A carbonizing device for producing activated carbon, comprising:

[2] In a carbonization device for the production of activated carbon, an organic object to be treated such as garbage, wood, meat-and-bone meal, clothing waste, plastics, etc. is heated with steam to perform a carbonization treatment such as drying, carbonization and activation.

A carbonization furnace that introduces superheated steam to carbonize the object to be treated and discharge used steam;

A drying furnace that introduces steam discharged from the carbonization furnace to dry the object to be treated and discharges used steam;

A high-temperature steam generator that generates high-temperature superheated steam to be supplied to the carbonization furnace by introducing steam,

Drying furnace power A deodorizing furnace that heats impurities contained in the used water vapor that has been discharged and burns it by deodorizing, and discharges high-temperature exhaust gas.

A carbonizing device for producing activated carbon, comprising:

[3] Organic waste such as garbage, wood, meat-and-bone meal, clothing waste, plastics, etc. In a carbonization device for producing activated carbon that performs carbonization such as drying, carbonization, and activation by heating at

A carbonization promoting furnace that introduces superheated steam to promote carbonization of the object to be treated, and discharges used steam;

A carbonization furnace that introduces water vapor discharged from the carbonization promotion furnace to carbonize the object to be treated, and discharges used water vapor;

A high-temperature water steam generator that generates high-temperature superheated steam to be supplied to the carbonization promoting furnace by introducing steam,

A carbonizing device for producing activated carbon, comprising:

[4] A drying furnace, a carbonizing furnace, a dry carbonizing furnace or a carbonization promoting furnace of the carbonizing apparatus for producing activated carbon according to claim 1,

A processing object supply port that supplies the processing object, a cylindrical section that stirs and moves the processing object, a discharge port that discharges the processing object, and a tangent line between the outside of the cylindrical section and the inner surface of the cylinder where superheated steam or used steam is discharged. A carbonization apparatus for producing activated carbon, comprising: a cylindrical shell having a water vapor introduction port for introducing water in a direction; and a rotatable stirring blade for stirring and moving an object to be processed in the cylindrical shell.

[5] The steam introduction port provided in the cylindrical shell of the carbonization device for producing activated carbon according to claim 4, wherein the superheated steam or the used steam is supplied in a direction tangential to the inner surface of the cylinder in the same direction as the rotation direction of the stirring blade. A carbonization device for producing activated carbon, characterized by having a steam inlet for introduction.

[6] A plurality of the steam inlets according to claim 5 are provided in the cylindrical shell of the carbonization device for producing activated carbon. A carbonization device for producing activated carbon, wherein the carbonization device is provided.

[7] The cylindrical shell of the carbonization device for producing activated carbon according to claim 4,

Activated carbon production characterized by having a steam outlet that discharges used steam after heating the object to be treated in the cylindrical shell from the inner surface of the cylinder to the outside of the cylinder in the tangential direction of the inner surface of the cylinder. Carbonization equipment.

[8] The cylindrical shell of the carbonization device for producing activated carbon according to claim 5,

[9] The cylindrical shell of the carbonization device for producing activated carbon according to claim 6,

[10] The carbonization device for producing activated carbon according to any one of claims 1 to 3,

It is equipped with a pressure regulating mechanism or a throttle that regulates the flow rate of superheated steam or used steam supplied to the drying furnace, carbonization furnace, drying carbonization furnace or carbonization promotion furnace to 5 to 20 (mZs). Carbonization equipment for the production of activated carbon.

[11] The carbonization apparatus for producing activated carbon according to claim 4,

[12] The carbonization device for producing activated carbon according to claims 5 to 9,