JPH10185160A - Circulation heat storage type deodorizing equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a circulation heat storage type deodorizing device which is easy in maintenance, prevents the gas to be treated from being mixed in the treated gas, and is small in pressure loss. SOLUTION: A circulation heat storage type deodorizing device is provided with an outlet side heat storage zone S1 and an inlet side heat storage zone S2 to keep the granular heat storage body W above and below a combustion chamber 13 provided with a direct firing burner 14, and circulates the heat storage body to the outlet side, the inlet side heat storage zone, the circulation passage, and the outlet side heat storage zone by the circulation passage provided outside a device body 11, feeds the gas to be treated below the inlet side heat storage zone to burn the offensive odor substance in the combustion chamber, and discharges the treated gas above the outlet side heat storage zone. A part in the vicinity of the outlet of the heat storage body from the device body of the circulation passage is communicated with a part in the vicinity of the inlet of the heat storage body to the device body of the circulation passage through a seal material feed passage 27 to form a seal material circulation passage B with the circulation passage, a seal material Wa smaller in diameter than the heat storage body is fed, and a screen 28 having openings which is larger in diameter than the seal material and smaller in diameter than the heat storage body is provided at a connection part of the seal material feed passage and a part in the vicinity of the inlet of the circulation passage, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circulating heat storage type deodorizing apparatus.

[0002]

2. Description of the Related Art Conventionally, a thermal storage type deodorizing apparatus has been widely used as an apparatus for deodorizing a gas to be treated containing a malodorous substance such as an organic solvent. A typical example of this heat storage type deodorizing apparatus is a heat storage type deodorizing apparatus comprising three heat storage chambers and a common combustion chamber provided above these heat storage chambers, and heat stored by the processing gas from which the odorous substances have been burned and removed in the previous step. (1) The gas to be treated is preheated in the heat storage chamber, and the odorous substances are incinerated in the combustion chamber and passed through the second heat storage chamber. During this time, the processing gas is cooled and discharged by exchanging heat with the heat storage material in the heat storage chamber. Is done. The third
A purge gas is supplied to the heat storage chamber to purge the gas to be processed remaining in the heat storage chamber in the previous process. After a lapse of a predetermined time, the switching valve is switched to supply the gas to be processed to the second heat storage chamber, the processing gas to the third heat storage chamber, and the purge gas to the first heat storage chamber. The gas to be treated is continuously deodorized.

In the thermal storage type deodorizing apparatus, since the gas to be processed remains in the heat storage chamber in which the gas to be processed is preheated, the processing gas cannot be passed immediately, and a purging process is required. In addition, at least three chambers are required, which not only increases the size of the apparatus but also switches between the heat storage chambers, so that deodorization cannot be performed simultaneously in all the heat storage chambers, resulting in poor deodorization efficiency. In addition, a switching valve is required to supply the gas to be processed, the processing gas, and the purge gas, and the switching valve has a very high switching frequency, so that the switching valve is easily damaged and frequent maintenance is required. Further, since the heat storage body is filled in the heat storage chamber, if the gas to be treated contains a large amount of silica (SiO ₂ ) or the like, the heat storage body adheres to the surface of the heat storage body to decrease the porosity, and Therefore, there is a problem that the exhaust fan capacity must be increased or the heat storage element becomes unusable due to blockage of the heat storage body.

As a solution to the above problem, there is a circulation type heat storage type deodorizing device. As shown in FIG. 3, this is a circulation path 2 in which the top and bottom of the deodorizing device main body 1 are provided outside the device.
The heat storage material (pellet) W is sent to the top by a circulating means 3 such as a fan, and is supplied from the heat storage material (pellet) W to the outlet tropical storage 4a formed of a breathable screen so as to have a predetermined thickness. On the other hand, the burner 5
The high-temperature processing gas from which the offensive odor substance is incinerated in the combustion chamber 6 having heat is exchanged with the heat storage material W of the outlet-side tropical storage 4a or the falling heat storage material W, so that the processing gas is cooled, and the outside of the deodorizer main body 1 Is discharged. Further, the heat storage body W is heated by exchanging heat with the high-temperature processing gas as described above, falls into the inlet side storage 4b formed of the lower air-permeable screen, and is supplied from below the deodorizing device main body 1. This is for preheating the gas to be treated. Thereafter, the heat storage body W circulates from the entrance-side tropical storage 4b to the exit-side tropical storage 4a via the circulation path 2.

[0005]

The circulation type heat storage type deodorizing apparatus has a single combustion chamber. The heat storage body is circulated and used continuously without using a switching valve. The problem of the heat storage type deodorizer can be solved. However, when the particle diameter of the heat storage body W is large, the gas to be treated is short-circuited to the outlet side of the deodorization device main body 1 through the circulation path 2 and mixes into the processing gas, thereby contaminating the processing gas. On the other hand, if the particle size is too small, the porosity between the heat storage bodies W deposited on the outlet side and the inlet side storage layer 4a, 4b is small, and particularly in the case of the gas to be treated containing silicon (SiO ₂ ). SiO ₂ adheres to the surface of the heat storage body W to further reduce the porosity and increase the pressure loss. Further, when the particle size of the heat storage body W is too small, there is a problem that the heat storage body W is discharged from the deodorization device main body 1 together with the processing gas. An object of the present invention is to provide a circulating heat storage type deodorizing apparatus that can solve the above-mentioned problem with a simple configuration.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a circulating heat storage type deodorizing apparatus in which a permeable material is provided above and below a combustion chamber provided with a direct fire burner of a deodorizing apparatus main body. In addition to providing an outlet-side storage and an entrance-side storage for holding a granular heat storage body, the outlet-side storage and the input-side storage of the heat storage via a circulation path provided outside the deodorizing device main body. ,
The gas is circulated from the circulation path to the outlet storage, and the gas to be treated is supplied from below the inlet storage to burn odorous substances in the combustion chamber and then discharged from above the outlet storage. In the circulation type heat storage type deodorizing device, the vicinity of the outlet of the heat storage body from the deodorization device main body of the circulation path and the vicinity of the entrance of the heat storage body to the deodorization device main body of the circulation path are communicated with a sealing material supply path. A seal material circulation path is formed by the material supply path and the circulation path, and a seal material having a smaller diameter than the heat storage body is supplied to the seal material circulation path. The connecting portion is provided with a screen having an opening that is larger in diameter than the sealing material and smaller in diameter than the heat storage body. Further, it is preferable to provide an impurity removing device in the sealing material circulation path.

[0007]

Next, an embodiment of the present invention will be described with reference to FIG. The circulation type heat storage type deodorizing apparatus 10 according to the present invention generally includes a deodorizing apparatus main body 11, a heat storage body circulation path A, and a seal material circulation path B. The deodorizing apparatus main body 11 has a processing target gas inlet 12a at a lower part, a processing gas outlet 12b at an upper part, and a direct fire burner 14 in a combustion chamber 13. Reference numeral 15 denotes a conveyor casing installed outside the deodorizing device main body 11, and a bucket conveyor 16 having a plurality of buckets 17 rotatably held therein is wound around a sprocket 18 inside.

Between the upper part of the deodorizing device main body 11 and the upper part of the conveyor casing 15, there is provided a heat storage body supply duct 20 inclined downward from the conveyor casing 15 toward the deodorizing device main body 11. Between the lower part of the deodorizer main body 11 and the lower part of the conveyor casing 15, the conveyor casing 1
Duct 21 for taking out the heat storage body inclined downward toward the side 5
Are provided respectively. Further, a first rotary feeder 22 is provided between a lower end of the heat storage medium take-out duct 21 and the bucket conveyor 16, while a first rotary feeder 22 is provided between the conveyor casing 15 and the upper end of the heat storage medium supply duct 20. A bucket tilting member 19 is provided which comes into contact with the bucket 17, rotates the bucket 17, and supplies a mixture of the heat storage material W and the sealing material Wa from the bucket 17 to the heat storage material supply duct 20.

Further, a screen 28 having an opening larger than the particle diameter of the sealing material Wa and smaller than the particle diameter of the heat storage body W is provided on the lower surface of the heat storage body supply duct 20.

On the other hand, the combustion chamber 13 of the deodorizing device body 11
Above the, delivery side by the screen N ₁ on protruding upward with a smaller opening than the particle diameter of the heat storage body W, as in the lower screen N ₂ projecting downward having a smaller opening than the particle diameter of the regenerator W A tropical storage S ₁ is formed, and an inlet-side tropical storage S ₂ having the same configuration as described above is formed below the combustion chamber 13. The heat storage material supply duct 20 communicates with the upper portion of the outlet heat storage material S ₁ , and the heat storage material take-out duct 21 communicates with the lower portion of the input heat storage S ₂ , and the heat storage material removal duct S ₁ communicates with the lower portion. The lower part and the upper part of the inlet side tropical storage S ₂ are communicated via a second rotary feeder 24 with a heat storage body transfer duct 23 having an opening smaller than the particle diameter of the heat storage body W, and the bucket conveyor 16 and the heat storage body supply duct The heat storage circuit circulation path A is composed of the output storage heat storage S ₁ , the heat storage medium transfer duct 23, the input heat storage S _2, and the heat storage medium removal duct 21. 2
Numeral 5 denotes a dispersion plate made of a gas permeable member, which distributes the heat storage material W evenly in the storage area.

Further, a sealing material supply passage 2 which communicates the heat storage material supply duct 20 with the heat storage material take-out duct 21.
7 is provided via an impurity separating device 26, and the sealing material supply path 27 and the bucket conveyor 16 constitute a sealing material circulation path B. As shown in FIG. 2, the impurity separation device 26 includes a chamber provided in a sealing material supply path 27,
The air blown from the blower F blows off impurities in the sealing material Wa to separate and remove the impurities.

Next, the operation of the circulating heat storage type deodorizing apparatus having the above-described configuration will be described. First, the outgoing storage zone S ₁ ,
A heat storage material W is filled in the heat storage material circulation passage A in the entrance side tropical storage S ₂ and in each bucket 17, and a sealing material such as sand having a smaller diameter than the heat storage material W is provided in the sealing material supply portion 21 a of the heat storage material extraction duct 21. in a state filled with Wa, mainly for heating the heat storage body W of the exit side in the heat storage zone S ₁ by burning the direct flame burner 14. When heat storage body W is heated to a predetermined temperature, the second rotary feeder 24, before gradually moving the regenerator W of outlet side in the heat storage zone S ₁ by driving the first rotary feeder 22 and the bucket conveyor 16 the entry side heat storage zone S ₂ to a high temperature.

Next, the gas to be treated is introduced into the gas inlet 12 of the gas to be treated.
a to supply into the deodorizer main body 11. The gas to be treated at normal temperature, first, the heat accumulation element W in the inlet side in the heat storage zone S ₂ 750
The combustion chamber 13 is heated to about 820 ° C. while the self-burning of the odorous substances such as the solvent in the gas to be treated is self-burned, and the odorous substances are completely burned and deodorized. The deodorized processing gas heats the heat storage body W in the outlet tropical storage S ₁ to about 800 ° C., and the processing gas itself is cooled to about 60 ° C.
b.

Since the temperature of the combustion chamber 13 required to completely burn (oxidatively decompose) the malodorous substances in the gas to be treated is about 820 to 850 ° C., if the preheating temperature of the gas to be treated is about 750 ° C. During normal operation, the combustion chamber 13 can be heated to a required temperature only by the self-combustion of the malodorous substance in the gas to be treated. Therefore, when the combustion chamber 13 enters a steady operation state, the direct fire burner 14 is extinguished. However, if the temperature of the combustion chamber 13 falls below the lower limit of the steady operation (for example, 800 ° C.) due to a decrease in the concentration of the offensive odor, the steady operation state cannot be maintained. I have to. Then, the concentration of the offensive odor substance returns to a predetermined value, and the temperature of the combustion chamber 13 becomes a predetermined value (for example, 85
(0 ° C.) or more, and returns to the normal operation state, the direct fire burner 14 is extinguished again. It should be noted that the incoming tropical storage S ₂
The heat storage body W is cooled by exchanging heat with the gas to be treated.

The heat storage body W circulates in a fixed amount by driving the second rotary feeder 24, the first rotary feeder 22, and the bucket conveyor 16 as shown by arrows in FIG. Further, in the vicinity of the first rotary feeder 22 of the heat storage medium take-out duct 21, a seal material Wa smaller in diameter than the heat storage medium W is mixed, and the gas to be processed supplied from the gas to be processed inlet 12a is supplied from this portion. A short circuit through the conveyor casing 15 to the processing gas outlet 12b is prevented from being discharged.

Further, the mixture of the sealing material Wa and the heat storage body W is supplied from the first rotary feeder 22 to the bucket 17 of the bucket conveyor 16 and rises in the conveyor casing 15. Then, the bucket 17 is rotated by the bucket tilting member 19, and the sealing material Wa and the heat storage body W
Is supplied to the heat storage material supply duct 20, where the sealing material Wa is separated from the heat storage material W by the screen 28, impurities in the sealing material Wa are removed by the impurity separation device 26, and the lower duct 21 is removed. Sealing material supply unit 21
It is returned to a and used cyclically. On the other hand, the heat storage body W the sealant Wa has been separated is used is returned to the outlet side the heat storage zone S ₁ circulation.

By the way, the upper screen N ₁ and the lower screen N ₂ constituting the outlet tropical storage S ₁ and the entrance tropical storage S ₂ do not necessarily need to protrude upward or downward as described above. You may comprise as a screen. Also, the regenerator transport duct 23 which communicates the outlet side the heat storage zone S ₁ and the entry side heat storage zone S ₂ may be omitted openings.

In the above-described embodiment, the compartments are formed by the upper and lower screens N ₁ and N ₂ for the outlet and inlet tropical zones S ₁ and S _2. However, the present invention is not limited to this. body W or deposited in layers, supplied by dropping the regenerator W from the output side heat storage zone S ₁ to the inlet side thermal storage zone S _2, it may be moved. Also,
It is not always necessary to provide the impurity separating device 26.

[0019]

As is clear from the above description, according to the present invention, the gas to be treated is stored in the heat storage medium because a sealing material having a smaller diameter than the heat storage medium is mixed in the vicinity of the heat storage body outlet of the heat storage body circulation path. It is short-circuited to the outlet side of the deodorizing device main body through the circulation path, and is not directly discharged to the outside. Further, since the sealing material is separated from the heat storage material near the heat storage body inlet, the heat storage body can have a relatively large diameter, and the outlet side installed in the deodorization device main body,
The porosity in the inlet tropical zone can be increased, so that the pressure loss is small and the exhaust fan can have a small capacity.

[Brief description of the drawings]

FIG. 1 is a schematic view of a circulation type heat storage type deodorizing apparatus according to the present invention.

FIG. 2 is a detailed view of the impurity separation device of FIG.

FIG. 3 is a schematic diagram of a conventional circulating heat storage type deodorizing apparatus.

[Explanation of symbols]

11: Deodorization device main body, 12a: Gas inlet to be treated, 12b
... Process gas outlet, 13 ... Combustion chamber, 14 ... Direct fire burner, 1
5 ... Conveyor casing, 16 ... Bucket conveyor, 1
7: Bucket, 19: Bucket tilting member, 20: Heat storage material supply duct, 21: Heat storage material take-out duct, 21a: Seal material supply unit, 23: Heat storage material transfer duct, 26: Impurity separation device, 27: Seal Material supply path, 28: Screen, A: Heat storage circuit circulation path, B: Sealing material circulation path, S ₁ : Outgoing side heat storage, S ₂ : Inlet side heat storage, W: Heat storage body, Wa: Sealing material.

Claims (2)

[Claims] 1. A deodorizing device, wherein an outlet storage and an inlet storage for holding a granular heat storage body by a permeable material are provided above and below a combustion chamber provided with a direct fire burner of a deodorization device main body. The heat storage body is circulated from the outlet storage, the inlet storage, from the circulation path to the outlet storage via a circulation path provided outside the main body, and the gas to be treated is transferred to the input side. In a circulating regenerative deodorizer that supplies from below the tropics and burns the offensive odor substance in the combustion chamber and then discharges from above the outlet tropics, near the outlet of the regenerator from the deodorizer body in the circulation path And the vicinity of the inlet of the heat storage body to the deodorizing device main body of the circulation path through a seal material supply path, and a seal material circulation path is formed by the seal material supply path and the circulation path. Supplying a sealing material having a smaller diameter than the heat storage body, In larger diameter than the sealing member to the connecting portion between the supply passage and the vicinity of an entrance of the circulation path, and, recycling regenerative deodorizing apparatus characterized by from regenerator provided with a screen having a small diameter aperture. 2. The circulating heat storage type deodorizing apparatus according to claim 1, wherein an impurity removing device is provided in the sealing material circulation path.