JP2008013643A - Dry distillation gas cooler - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dry distillation gas cooler efficiently recovering sludge in the dry distillation gas. <P>SOLUTION: The primary dry distillation gas cooler 20 is designed to cool the dry distillation gas and recover an oil (a liquefied material) and is composed as follows. The primary dry distillation gas cooler 20 is equipped with a gas introduction chamber 21 in which the dry distillation gas is introduced, a liquefied material recovering chamber 26 for recovering the liquefied material of a liquefied dry distillation gas, a main heat exchange part 22 for cooling the dry distillation gas, a gas recovering chamber 24 for recovering the dry distillation gas passing through the main heat exchange part 22 and making the recovered dry distillation gas flow out of a gas exhaust port 28 and cooling pipe groups 32 and 33 interposed in the gas introduction chamber 21 in a body 30 of the primary dry distillation gas cooler 20. Cooling water (a cooling medium) flows in the interior of the cooling pipe groups 32 and 33 and the sludge deposited from the dry distillation gas flowing on the outside of the cooling pipe groups 32 and 33, together with the liquefied material, is passed through the liquefied material recovering chamber 26 and discharged. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an improvement of a dry distillation gas cooler provided in a dry distillation apparatus for dry distillation of organic matter such as waste tires, wood, and other wastes into oil, gas, carbides and the like.

  Conventionally, as this type of dry distillation apparatus, there is one shown in FIG. 4 (see Patent Document 1).

  Explaining this, a pyrolysis furnace 1 for heating organic matters such as waste tires in a sealed container (pot) 2 and a dry distillation gas taken out from the container 2 through a valve 3 and a pipe 4 are cooled in stages. The primary dry distillation gas cooler 5 and the secondary dry distillation gas cooler 6 and the oil liquefied in the primary dry distillation gas cooler 5 and the secondary dry distillation gas cooler 6 are recovered through the pipes 7 and 8 and are contained in the oil. An oil / water separation tank 9 for separating and removing water, and a liquefied tank 14 to which oil from the oil / water separating tank 9 is sent through a pipe 11, a pump 12, and a filter 10, are purified in the liquefied tank 14. Oil is stored.

  On the other hand, excess dry distillation gas that has not been liquefied by the primary dry distillation gas cooler 5 and the secondary dry distillation gas cooler 6 is sent to the gas combustion furnace 17 through the liquid phase safety device 15 and the pipe 16. Burn. A part of the gas passed through the liquid phase safety device 15 is supplied to the burner of the pyrolysis furnace 1 through the valve 18 and the pipe 19 and used as a heat source for heating the container 2.

  The cooling medium of each of the dry distillation gas coolers 5 and 6 is water, and this cooling water circulates in the dry distillation gas coolers 5 and 6 and a water tank (not shown).

  As shown in FIG. 5, the primary dry distillation gas cooler 5 includes a gas introduction chamber 61 into which dry distillation gas is introduced, a plurality of gas pipes 70 and 58 disposed above and below the gas introduction chamber 61, and each upper gas pipe. A gas recovery chamber 71 disposed above 70, and a liquefied material recovery chamber 59 disposed below each lower gas pipe 58.

  An upper cooling water chamber 67 is defined in the primary dry distillation gas cooler 5 by upper and lower partition plates 65, 66, and each upper gas pipe 70 extends so as to pass through the upper cooling water chamber 67. Cooling water circulates in the upper cooling water chamber 67 through the water supply port 68 and the drainage port 69, and the dry distillation gas passing through each upper gas pipe 70 is cooled by this cooling water.

  A lower cooling water chamber 55 is defined in the primary dry distillation gas cooler 5 by upper and lower partition plates 53, 54, and each lower gas pipe 58 extends so as to penetrate the lower cooling water chamber 55. Cooling water circulates in the lower cooling water chamber 55 through a water supply port 56 and a drainage port 57, and oil and dry distillation gas passing through the lower gas pipes 58 are cooled by the cooling water.

  The dry distillation gas taken out from the container 2 of the pyrolysis furnace 1 is introduced into the gas introduction chamber 61 through the gas supply port 62.

  The dry distillation gas introduced into the gas introduction chamber 61 is cooled in the process of flowing through the gas pipes 70, 58, and the dry distillation gas is liquefied and promoted to oil.

  The oil liquefied in the primary dry distillation gas cooler 5 flows down to the liquefied product recovery chamber 59 and is sent from the liquefied product outlet 60 to the oil / water separation tank 9.

Excess dry distillation gas that has not been liquefied in the primary dry distillation gas cooler 5 is recovered in the gas recovery chamber 71 and sent from the gas discharge port 72 to the secondary dry distillation gas cooler 6.
JP 2002-80359 A

  However, in such a conventional carbonization apparatus, since the carbonization gas introduced into the gas introduction chamber 61 of the primary carbonization gas cooler 5 is cooled in the process of flowing through the gas pipes 70, 58, Sludge contained in the dry distillation gas begins to accumulate on the surfaces of the partition plates 53 and 65 and the surfaces of the end portions of the gas pipes 70 and 58 projecting therefrom, and eventually accumulates on the inner peripheral surfaces of the gas pipes 70 and 58. There is a problem that cooling of the gas pipe cannot be sufficiently performed, the interior of each of the gas pipes 70, 58, the gas introduction chamber 61, and the gas recovery chamber 71 are filled with sludge, making it difficult for the dry distillation gas to flow.

  Further, in order to remove sludge accumulated in the gas pipes 70 and 58, the gas introduction chamber 61, and the gas recovery chamber 71, the primary dry distillation gas cooler 5 needs to be disassembled, which requires a lot of maintenance. There was a point.

  This invention is made | formed in view of said problem, and it aims at providing the dry distillation gas cooler which can collect | recover sludge efficiently.

  A first invention is a dry distillation gas cooler for cooling a dry distillation gas and recovering a liquefied product, a gas introduction chamber for introducing a high temperature dry distillation gas, a liquefied product recovery chamber for recovering a liquefied product obtained by liquefying the dry distillation gas, A main heat exchange section that cools the dry distillation gas, a gas recovery chamber that collects the dry distillation gas that has passed through the main heat exchange section and flows it out of the gas discharge port, and a cooling pipe group that is interposed in the gas introduction chamber, A cooling medium is allowed to flow inside the cooling pipe group, and sludge precipitated from dry distillation gas flowing outside the cooling pipe group is discharged together with the liquefied substance through the liquefied substance recovery chamber.

  According to a second aspect of the present invention, the gas introduction chamber includes a gas introduction space in which a gas supply port is opened, and an upper space that guides the dry distillation gas introduced into the gas introduction space to the main heat exchanging portion. The pipe group was arranged.

  According to a third aspect of the present invention, the gas introduction chamber includes a lower space defined between the gas introduction space and the liquefied material recovery chamber, and a cooling pipe group is disposed in the lower space.

  According to a fourth aspect of the present invention, the cooling pipe group includes cooling pipes arranged alternately at predetermined intervals in the vertical direction, and the cooling pipes are arranged so as to intersect each other when viewed from above. .

  According to a fifth aspect of the present invention, a main body that houses the cooling pipe group is provided with a side maintenance hole that opens to face the cooling pipe group, and a cover that opens and closes the side maintenance hole is provided. .

  According to a sixth aspect of the present invention, the main heat exchanging section includes a gas pipe group extending in the vertical direction through the gas introduction chamber and the gas recovery chamber, and a gas pipe containing refrigerant chamber for flowing a cooling medium around the gas pipe group. An upper end maintenance hole that opens to face the upper end of the gas pipe group is provided in the main body that accommodates the replacement part, and a cover that opens and closes the upper end maintenance hole is provided.

  According to the first invention, the dry distillation gas is cooled by the cooling pipe group in the gas introduction chamber and then flows into the main heat exchange section after the sludge is collected, so that the sludge adheres to the main heat exchange section. , And the liquefied material is efficiently recovered by maintaining the cooling performance of the main heat exchange section.

  Sludge deposited through the cooling pipe group in the gas introduction chamber falls into the liquefied material recovery chamber and can be discharged together with the liquefied material flowing down to the liquefied material recovery chamber.

  According to the second invention, the high temperature dry distillation gas does not flow directly into the main heat exchange section, but the dry distillation gas is cooled by the cooling pipe group in the process from the gas introduction chamber to the main heat exchange section. Thus, it is promoted that sludge is deposited from the dry distillation gas, and sludge is collected efficiently.

  According to the third invention, the high temperature dry distillation gas does not flow directly into the liquefaction recovery chamber, and the dry distillation gas is cooled by the cooling pipe group in the process from the gas introduction chamber to the liquefaction recovery chamber. Thus, it is promoted that sludge is deposited from the dry distillation gas, and sludge is collected efficiently.

  According to the fourth aspect of the invention, the dry distillation gas flows and cools while repeatedly hitting the outer surface of each cooling pipe, and it is promoted that sludge is precipitated from the dry distillation gas, so that the sludge is collected efficiently. Moreover, even if a certain amount of sludge accumulates on the cooling pipe, the dry distillation gas smoothly flows around the cooling pipe, and the cooling performance of the dry distillation gas cooler can be maintained.

  According to the fifth aspect of the invention, it is possible to easily remove the sludge accumulated in the cooling pipe group, and to improve maintainability.

  According to the sixth aspect of the invention, the work of removing the sludge accumulated in the gas pipe group can be easily performed, and the maintainability can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  A dry distillation gas cooler 20 shown in FIG. 1 is provided, for example, in the dry distillation apparatus shown in FIG. 4 described above. The dry distillation gas cooler 20 passes the dry distillation gas taken out from the container 2 of the pyrolysis furnace 1 and cools the dry distillation gas to oil. (Liquid) is recovered.

  Note that the present invention is not limited to the carbonization apparatus shown in FIG. 4 but can be applied to other carbonization apparatuses that recycle organic substances into oil, gas, carbides, and the like.

  Hereinafter, the configuration of the primary dry distillation gas cooler 20 will be described.

  The primary dry distillation gas cooler 20 is provided with a cylindrical main body 30 standing substantially vertically, a gas introduction chamber 21 is defined in the middle of the main body 30, and a gas recovery chamber 24 is formed in the upper portion of the main body 30. A liquefied material recovery chamber 26 is defined in the lower part of the main body 30.

  As indicated by arrows in the figure, the dry distillation gas from the pyrolysis furnace 1 flows into the gas introduction chamber 21 from the gas supply port 27 and is cooled in the main body 30. The dry distillation gas cooled in the main body 30 gathers in the upper gas recovery chamber 24 and flows out from the gas discharge port 28 and is sent to the secondary dry distillation gas cooler 6, while the oil liquefied in the main body 30 is liquefied in the lower part. It collects in the recovery chamber 26, flows out from the liquefied product outlet 29, and is sent to the liquefied product tank 14.

  The primary dry distillation gas cooler 20 includes a main heat exchange unit 22 that cools the dry distillation gas and promotes liquefaction (condensation) of its components.

  As the main heat exchanging section 22, there are provided a gas pipe group 34 through which dry distillation gas flows from the gas introduction chamber 21 to the gas recovery chamber 24, and a gas pipe housing refrigerant chamber 35 through which cooling water (cooling medium) flows around the gas pipe group 34. It is done.

  Disc-shaped upper and lower partition walls 36 and 37 extending in the horizontal direction are provided in the main body 30, and a gas pipe containing refrigerant chamber 35 is defined between the upper and lower partition walls 36 and 37.

  The gas pipe group 34 includes gas pipes 41 extending in a substantially vertical direction, and the gas pipes 41 are provided so as to be arranged in the gas pipe containing refrigerant chamber 35 with a predetermined interval. Each gas pipe 41 is provided so as to penetrate the upper and lower partition walls 36 and 37, and communicates the gas introduction chamber 21 and the gas recovery chamber 24.

  A refrigerant inlet 35 a is opened at the lower part of the gas pipe containing refrigerant chamber 35, and a refrigerant outlet 35 b is opened at the upper part of the gas pipe containing refrigerant chamber 35. The refrigerant inlet 35a and the refrigerant outlet 35b are arranged so as to open on the opposite sides with respect to the main body 30. In addition, arrangement | positioning of the refrigerant | coolant inlet 35a and the refrigerant | coolant outlet 35b is not restricted to this, It arrange | positions arbitrarily according to the conditions requested | required.

  The cooling water flows into the gas pipe accommodating refrigerant chamber 35 through the refrigerant inlet 35a and flows out from the gas pipe accommodating refrigerant chamber 35 through the refrigerant outlet 35b.

  In the gas pipe containing refrigerant chamber 35, the cooling water flows from the refrigerant inlet 35a toward the refrigerant outlet 35b, and the outer surface of each gas pipe 41 is exposed to the flow of the cooling water. In the process of flowing from the gas introduction chamber 21 through the gas pipe group 34 to the gas recovery chamber 24, the dry distillation gas is cooled by dissipating heat to the cooling water flowing through the gas pipe containing refrigerant chamber 35 through the gas pipe group 34. The ingredients are encouraged to liquefy.

  The gas introduction chamber 21 is defined as a cylindrical space below the main heat exchange unit 22, and the gas supply port 27 is opened in the middle of the gas introduction chamber 21. The dry distillation gas introduced from the gas supply port 27 flows into the gas introduction space 21b of the gas introduction chamber 21, and spreads from the gas introduction space 21b to the upper space 21a and the lower space 21c.

  The gas introduction chamber 21 of the primary carbonization gas cooler 20 is provided with a cooling pipe group 32 through which cooling water flows in the upper space 21 a of the gas introduction chamber 21 in order to collect sludge contained in the carbonization gas, and the gas introduction chamber 21. A cooling pipe group 33 through which cooling water flows is provided in the lower space 21c.

  The upper and lower cooling pipe groups 32 and 33 have the same structure, and as shown in FIG. 2, four cooling pipes 38 and 39 each extending in a lattice shape intersecting each other when viewed from above are provided.

  In addition, the number of the cooling pipes 38 and 39 is not limited to this, and may be provided one by one, for example, and is arbitrarily set.

  Each cooling pipe 38 is formed by bending one pipe material, and includes a refrigerant inlet 38a through which cooling water is introduced, a refrigerant outlet 38b through which cooling water flows out, and six straight pipe portions extending in the left-right direction in FIG. 38c and five curved pipe portions 38d curved by connecting the straight pipe portions 38c.

  Each cooling pipe 39 is similarly formed by bending one pipe material, and includes a refrigerant inlet 39a through which cooling water is introduced, a refrigerant outlet 39b through which cooling water flows out, and six straight lines extending in the vertical direction in FIG. It has a pipe part 39c and five curved pipe parts 39d that are curved by connecting the straight pipe parts 39d.

  In addition, the number of straight pipe parts 38c and 39c, curved pipe parts 38d and 39d, etc. is not restricted to this, and is set arbitrarily.

  The cooling pipes 38 and 39 are alternately arranged at predetermined intervals in the vertical direction, and the straight pipe portions 38c and 39c are arranged so as to be substantially orthogonal to each other when viewed from above.

  The straight pipe portions 38c and 39c are arranged so as to be orthogonal to each other when viewed from above, but the crossing angle of the straight pipe portions 38c and 39c is not limited to 90 degrees and may be set to other angles.

  In each of the cooling pipes 38 and 39, cooling water cooled by a cooling tower (not shown) is circulated mainly through a pipe (not shown), but it is also possible to circulate cooling water stored in a water storage tank.

  Each cooling pipe 38, 39 is exposed to dry distillation gas flowing through the gas introduction chamber 21 while cooling water flows inside thereof. The dry distillation gas is cooled by dissipating heat to the cooling water flowing through the cooling pipes 38 and 39, and accordingly, liquefied material and sludge are deposited.

  The primary dry distillation gas cooler 20 includes a refrigerant chamber 42 through which cooling water flows around the gas introduction chamber 21 and the liquefaction recovery chamber 26 of the main body 30. The refrigerant chamber 42 is defined as an annular space between the cylindrical outer plate 30 a and the inner plate 30 b of the main body 30.

  A refrigerant inlet 42 a opens in the middle of the refrigerant chamber 42, and a refrigerant outlet 42 b opens in the upper part of the refrigerant chamber 42. The cooling water flows into the refrigerant chamber 42 through the refrigerant inlet 42a, and flows out from the refrigerant chamber 42 through the refrigerant outlet 42b.

  The inner plate 30b of the refrigerant chamber 42 is exposed to the dry distillation gas flowing in the gas introduction chamber 21, and the dry distillation gas is cooled by dissipating heat to the cooling water flowing in the refrigerant chamber 42, so that liquefied material and sludge are deposited. .

  From the refrigerant chamber 42, the refrigerant outlet 42b and the refrigerant inlet 35a of the gas pipe containing refrigerant chamber 35 are connected by a pipe (not shown). Thereby, the cooling water that has flowed out of the refrigerant chamber 42 flows into the gas pipe containing refrigerant chamber 35 through this pipe.

  The main body 30 is provided with upper and lower side maintenance holes 30 c and 30 d that open to face the gas introduction chamber 21. The upper and lower side maintenance holes 30c and 30d are opened at portions facing the sides of the cooling pipe group 32 and the cooling pipe group 33 of the main body 30, respectively.

  The upper and lower side maintenance holes 30c and 30d have the same structure as each other, and are provided with a cover 48 for opening and closing the side maintenance holes 30c and 30d as shown in FIG.

  An inner gasket 47 is provided around the side maintenance holes 30 c and 30 d inside the main body 30, and the inner wall surface of the cover 48 is brought into contact with the inner gasket 47 so that the side maintenance holes 30 c and 30 d and the cover 48 are in contact with each other. Is sealed.

  An outer packing (not shown) that contacts the outer wall surface of the main body 30 and the outer wall surface of the cover 48 is provided, and the space between the side maintenance holes 30 c and 30 d and the cover 48 is also sealed by this outer packing.

  The cover 48 includes a refrigerant chamber 49 through which cooling water flows. The refrigerant chamber 49 is defined between the outer plate 48 a and the inner plate 48 b of the cover 48 of the main body 30.

  A refrigerant inlet 48 c and a refrigerant outlet 48 d are opened in the outer plate 48 a of the refrigerant chamber 49. The cooling water flows into the refrigerant chamber 49 through the refrigerant inlet 48c, and flows out from the refrigerant chamber 49 through the refrigerant outlet 48d.

  An upper end maintenance hole 30 e that opens toward the gas recovery chamber 24 is provided at the upper end of the cylindrical main body 30. The upper end maintenance hole 30e is opened at a position facing the upper end 34a of the gas pipe group 34.

  A cover 46 for opening and closing the upper end maintenance hole 30e is provided. The disc-shaped cover 46 is fastened at its outer peripheral end via a plurality of bolts (not shown).

  A level gauge 45 communicating with the liquefied material recovery chamber 26 is connected to the main body 30. When the oil liquefied in the primary dry distillation gas cooler 20 accumulates over the liquefied material recovery chamber 26 and the gas introduction chamber 21 in the main body 30, the oil level in the main body 30 is seen by looking at the oil level height in the level gauge 45. Are configured to match. Thereby, when clogging occurs in the liquefied product discharge port 29 or the like and the liquefied oil is collected in the liquefied product collecting chamber 26, the operator looks at the oil level in the level gauge 45 and the oil level in the main body 30. Can be confirmed.

  The main body 30 is divided into a main body upper part 30f in which the main heat exchanging part 22 is accommodated and a main body lower part 30g in which the cooling pipe groups 32 and 33 are accommodated, and both are connected by a divided part joining flange 30h.

  A heat expansion / contraction absorption flange 30i is formed in the middle of the main body upper portion 30f, and a heat expansion / contraction absorption flange 30j is formed in the middle of the main body lower portion 30g so as to suppress distortion caused by the heat expansion / contraction of the main body 30. It has become.

  Next, the operation of the primary dry distillation gas cooler 20 will be described.

  As shown by arrows in FIG. 1, the high temperature dry distillation gas from the pyrolysis furnace 1 flows into the high temperature gas introduction chamber 21 from the gas supply port 27, and passes through the gas introduction chamber 21 to the main heat exchange unit 22. The gas dissipates heat to the cooling water flowing through the cooling pipes 38 and 39 and is cooled. As a result, the oil obtained by liquefying the components of the dry distillation gas adheres to the outer surfaces of the cooling pipes 38 and 39 and flows down. , 39, sludge precipitated from the carbonized gas falls on the outer surface of each cooling pipe 38, 39.

  Furthermore, the dry distillation gas is cooled by dissipating heat to the cooling water flowing around the gas pipe group 34 even in the process of flowing through the gas pipe group 34 of the main heat exchange section 22 to the gas recovery chamber 24, and the components of the dry distillation gas are liquefied. As a result, oil flows along the inner peripheral surface of each gas pipe 31.

  The carbonized gas thus cooled collects in the gas recovery chamber 24 and flows out from the gas discharge port 28 and is sent to the secondary dry distillation gas cooler 6, while the oil liquefied in the main body 30 flows down into the liquefied product recovery chamber 26. The sludge deposited in the main body 30 falls into the liquefied material recovery chamber 26 and collects and flows out from the liquefied material discharge port 29.

  The oil containing the sludge flowing out from the liquefied product discharge port 29 passes through a sludge separator (not shown), and the sludge is separated and recovered from the oil by the sludge separator.

  The oil from which the sludge flowing out from the sludge separator is separated is sent to the liquefaction tank 14 and stored in the liquefaction tank 14 (see FIG. 4).

  The dry distillation gas flows into the gas pipe group 34 of the main heat exchanging portion 22 after sludge is deposited around the cooling pipe groups 32 and 33, so that sludge accumulates on the inner peripheral surface of each gas pipe 31. Thus, it is possible to prevent the sludge from impairing the cooling performance of the main heat exchanging portion 22 and prevent the gas pipe group 34 from being clogged.

  The dry distillation gas from the gas introduction chamber 21 through the upper space 21a to the main heat exchanging portion 22 is cooled by releasing heat to the cooling water flowing through the cooling pipes 38 and 39 of the cooling pipe group 32, and is precipitated along with this. The sludge to be deposited is deposited to some extent on the outer surfaces of the cooling pipes 38 and 39 and falls into the liquefaction recovery chamber 26.

  The dry distillation gas heading from the gas introduction chamber 21 to the main heat exchanging part 22 via the lower space 21b is cooled by releasing heat to the cooling water flowing through the cooling pipes 38 and 39 of the cooling pipe group 33, and accordingly. Precipitated sludge accumulates to some extent on the outer surfaces of the cooling pipes 38 and 39 and falls into the liquefaction recovery chamber 26.

  Sludge precipitated in the gas introduction chamber 21 via the cooling pipe groups 32 and 33 falls into the liquefied material recovery chamber 26 and is recovered together with the oil flowing down to the liquefied material recovery chamber 26.

  Since the cooling pipe groups 32 and 33 are arranged so that the plurality of cooling pipes 38 and 39 intersect each other when viewed from above, the dry distillation gas flows while repeatedly hitting the outer surfaces of the cooling pipes 38 and 39, It is promoted that sludge is deposited.

  When a large amount of sludge is accumulated on the outer surfaces of the cooling pipe groups 32 and 33, the respective cover 48 is removed and the side maintenance holes 30c and 30d are opened, and the sludge accumulated on the cooling pipe groups 32 and 33 is removed. .

  When sludge accumulates on the inner peripheral surface of each gas pipe 31, the cover 46 is removed, the upper end maintenance hole 30e is opened, and the operation of removing the sludge accumulated on the inner peripheral surface of each gas pipe 31 is performed.

  In the present embodiment, the following effects can be achieved.

  In the primary dry distillation gas cooler 20 that cools the dry distillation gas and recovers oil (liquefied product), a gas introduction chamber 21 into which the dry distillation gas is introduced into the main body 30 of the primary dry distillation gas cooler 20, and the dry distillation gas is liquefied. A liquefied product recovery chamber 26 for recovering the liquefied product, a main heat exchanging portion 22 for cooling the dry distillation gas, a gas recovery chamber 24 for recovering the dry distillation gas that has passed through the main heat exchanging portion 22 and flowing it out from the gas outlet 28 And cooling pipe groups 32 and 33 interposed in the gas introduction chamber 21, cooling water flows inside the cooling pipe groups 32 and 33, and sludge deposited from dry distillation gas flowing outside the cooling pipe groups 32 and 33 is formed. Since it is configured to be discharged together with the liquefied material through the liquefied material recovery chamber 26, the dry distillation gas flows into the main heat exchanging portion 22 after the sludge is efficiently recovered by the cooling pipe groups 32 and 33, and the main heat exchanging portion. 22 Prevents di adheres, the recovery of the liquefied material is carried out efficiently by maintaining the cooling of the main heat exchanger 22.

  The gas introduction chamber 21 includes a gas introduction space 21b in which a gas supply port 27 is opened, and an upper space 21a that guides the dry distillation gas introduced into the gas introduction space 21b to the main heat exchange unit 22, and the upper space 21a includes Since the cooling pipe group 32 is arranged, the high temperature dry distillation gas does not flow directly into the main heat exchanging section 22, and the dry distillation gas is generated by the cooling pipe group 32 in the process from the gas introduction chamber 21 to the main heat exchanging section 22. By being cooled, it is promoted that sludge is precipitated from the dry distillation gas, and sludge is collected efficiently.

  The gas introduction chamber 21 includes a lower space 21c defined between the gas introduction space 21b and the liquefied material recovery chamber 26. Since the cooling pipe group 33 is disposed in the lower space 21c, the high temperature dry distillation gas is directly liquefied. The dry distillation gas is cooled by the cooling pipe group 32 in the process from the gas introduction chamber 21 to the liquefied product recovery chamber 26 without flowing into the recovery chamber 26, thereby promoting sludge precipitation from the dry distillation gas. Thus, sludge can be collected efficiently.

  The cooling pipe groups 32 and 33 include cooling pipes 38 and 39 that are alternately arranged at predetermined intervals in the vertical direction, and the cooling pipes 38 and 39 are arranged so as to intersect each other when viewed from above. The gas repeatedly cools while repeatedly hitting the outer surfaces of the cooling pipes 38 and 39, and it is promoted that sludge is precipitated from the dry distillation gas, so that sludge is collected efficiently. Further, even if a certain amount of sludge accumulates on the cooling pipes 38 and 39, the dry distillation gas smoothly flows around the cooling pipes 38 and 39, and the cooling property of the secondary dry distillation gas cooler 20 can be maintained.

  The main body 30 that accommodates the cooling pipe groups 32 and 33 is provided with side maintenance holes 30c and 30d that open facing the cooling pipe groups 32 and 33, and the cover 48 that opens and closes the side maintenance holes 30c and 30d is provided. In addition, it is possible to easily remove the sludge accumulated on the cooling pipe groups 32 and 33, and the maintainability can be improved.

  The main heat exchanging unit 22 includes a gas pipe group 34 that communicates with the gas introduction chamber 21 and the gas recovery chamber 24 and extends in the vertical direction, and a gas pipe containing refrigerant chamber 35 that allows cooling water to flow around the gas pipe group 34. The main body 30 that accommodates the portion 22 is provided with an upper end maintenance hole 30e that opens to face the upper end 34a of the gas pipe group 34, and the cover 46 that opens and closes the upper end maintenance hole 30e is provided. The work which removes the sludge which carried out can be performed easily, and maintenance nature is improved.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

Sectional drawing of the primary dry distillation gas cooler which shows embodiment of this invention. Sectional drawing which follows the AA line and BB line of FIG. Sectional drawing of a primary carbonization gas cooler similarly. 1 is a system diagram of a carbonization apparatus to which the present invention is applied. The front view which shows the conventional primary carbonization gas cooler partially fractured | ruptured.

Explanation of symbols

20 Gas distillation cooler 21 Gas introduction chamber 21a Upper space 21b Gas introduction space 21c Lower space 22 Main heat exchange section 24 Gas recovery chamber 26 Liquefaction recovery chamber 28 Gas discharge port 30c Side maintenance hole 30d Side maintenance hole 30e Upper end Maintenance hole 32 Refrigerant pipe group 33 Refrigerant pipe group 38 Refrigerant pipe 39 Refrigerant pipe 34 Gas pipe group 35 Gas pipe containing refrigerant chamber 46 Cover 48 Cover 49 Refrigerant chamber

Claims (6)

  In the dry distillation gas cooler that cools the dry distillation gas and collects the liquefied product, the gas introduction chamber into which the high temperature dry distillation gas is introduced, the liquefied product recovery chamber that collects the liquefied product liquefied by the dry distillation gas, and the dry distillation gas are cooled. A main heat exchanging section, a gas recovery chamber for collecting the dry distillation gas that has passed through the main heat exchanging section and flowing it out from the gas discharge port, and a cooling pipe group interposed in the gas introduction chamber. The dry distillation gas cooler is characterized in that a cooling medium is flown through and the sludge deposited from the dry distillation gas flowing outside the cooling pipe group is discharged together with the liquefied product through the liquefied product recovery chamber.   The gas introduction chamber includes a gas introduction space in which the gas supply port opens, and an upper space that guides dry distillation gas introduced into the gas introduction space to the main heat exchange unit, and the cooling pipe group is provided in the upper space. The dry distillation gas cooler according to claim 1, wherein:   The said gas introduction chamber is provided with the lower space defined between the said gas introduction space and the said liquefied material collection | recovery chamber, The said cooling pipe group is arrange | positioned in this lower space, The Claim 1 or 2 characterized by the above-mentioned. Dry distillation gas cooler.   The cooling pipe group includes cooling pipes arranged alternately with a predetermined interval in the vertical direction, and the cooling pipes are arranged so as to intersect each other when viewed from above. Dry distillation gas cooler.   4. A main body that accommodates the cooling pipe group is provided with a side maintenance hole that opens to face the cooling pipe group, and a cover that opens and closes the side maintenance hole is provided. Dry distillation gas cooler.   The main heat exchanging section includes a gas pipe group extending in the vertical direction through the gas introduction chamber and the gas recovery chamber, and a gas pipe containing refrigerant chamber for flowing a cooling medium around the gas pipe group, the main heat exchanging section 6. A maintenance body having an upper end maintenance hole that opens to face an upper end portion of the gas pipe group, and a cover that opens and closes the upper end maintenance hole. The dry distillation gas cooler described in 1.