JP3746535B2 - Raw material supply equipment for organic gasifier - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an apparatus for supplying organic raw materials to a partial gasification furnace for organic substances (heavy oil, residual oil, plastic, etc.).
[0002]
[Prior art]
FIG. 3 is a side view showing a concept of a partial gasification apparatus for organic matter such as waste plastic and its raw material supply apparatus as an example of a conventional apparatus. As shown in FIG. 3, a steam / oxygen mixed gas (oxygen is a combustion supporting gas) 61 of 100 to 300 ° C. is supplied from a mixed gas supply line 55 to a raw material / gas supply pipe 56, and from the raw material hopper 53, for example, waste plastic. The organic raw material 60 pulverized into fine particles for promoting the reaction is supplied to the raw material / gas supply pipe 56 through the raw material descending pipe 54 by the screw feeder 51 as the raw material feeder, and the water vapor / oxygen mixed gas 61 as the transport medium is supplied. The gas is fed into the gasification furnace 57 at about 700 ° C. by flow. Then, a jet gas 62 which is an inert gas such as carbon dioxide gas is supplied into the gasification furnace 57 from a jet gas supply line 58 sealed by a water-sealed tank 59 at normal temperature. The organic raw material 60 and the water vapor / oxygen mixed gas 61 are reacted and gasified by a jet to generate a raw material gas 63 for methanol synthesis, for example. The gasification furnace 51 is maintained at a temperature of around 700 ° C. by this heat of reaction.
[0003]
[Problems to be solved by the invention]
In the conventional apparatus described above, the water vapor in the water vapor / oxygen mixed gas 61 supplied from the mixed gas supply line 55 to the raw material / gas supply pipe 56 diffuses into the raw material downcomer pipe 54 and the screw feeder 51 as shown in FIG. Then, by cooling and condensing, the fine organic material 60 is wetted with the condensed water to become the deposit 71, and the screw feeder 51 and the downcomer pipe 54 are closed.
Further, in the raw material / gas supply pipe 56, the organic raw material 60 is melted by the steam / oxygen mixed gas 61 at 110 ° C. or more to become the inner wall welded material 72 and closes the inside of the raw material / gas supply pipe 56. In addition, the supply of the steam / oxygen mixed gas 61 becomes difficult.
[0004]
In view of the above technical level, the present invention is intended to provide a raw material supply apparatus for an organic gasification furnace that can prevent the occurrence of problems as in the conventional apparatus described above.
[0005]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the structure of the raw material supply apparatus for an organic gasification furnace according to the present invention is as follows.
[0006]
(1) In a raw material supply apparatus for supplying a plastic organic raw material to a partial gasifier using water vapor or a water vapor / support gas mixture as a carrier medium gas, a raw material feeder, and a raw material downcomer pipe provided on the outlet side of the raw material feeder A raw material / gas supply pipe connecting the lower part of the raw material downcomer and the gasifier, a carrier medium gas supply means provided on the inlet side of the raw material / gas supply pipe, and the pipe above the raw material downcomer A non-condensable gas supply means for injecting a non-condensable gas toward the axis of the material, a jacket covering the outer surfaces of the raw material downcomer and the raw material / gas supply pipe, and an atmospheric pressure saturated steam supply means provided in the jacket, Is provided.
[0007]
(2) In the apparatus of (1) above, the raw material feeder is a second-stage raw material feeder, the raw material downcomer is a lower raw material downcomer, and the first-stage raw material feeder is above the second-stage raw material feeder. It is provided via the upper material downcomer.
[0008]
(3) In the apparatus of the above item (2), the non-condensable gas supply means is a lower non-condensable gas supply means, and the non-condensable gas is supplied above the upper material downcomer pipe toward the axis of the pipe. An upper non-condensable gas supply means for injection is provided.
[0009]
[Action]
(1) Non-condensable gas is injected along the axis from above in the raw material downcomer by the noncondensable gas supply means, and the water vapor supplied from the carrier medium gas supply means is diffused in the raw material downcomer and in the raw material feeder. In addition, the atmospheric pressure saturated steam at 100 ° C. is supplied into the jacket by the atmospheric pressure saturated steam supply means, and the raw material downcomer and the raw material / gas supply pipe are maintained at 100 ° C. Prevents condensation and melting of fine organic raw materials in the raw material and gas supply pipe. Then, the organic raw material pulverized into fine particles is supplied to the raw material / gas supply pipe through the raw material downcomer pipe by the raw material feeder, and the transport medium gas of water vapor or steam / supporting gas mixture is supplied to the raw material / gas supply means by the transport medium gas supply means. The organic material is supplied to a gas supply pipe, and the organic raw material is supplied to the partial gasification furnace by the flow of the carrier medium gas and reacted at a high temperature to generate the raw material gas.
[0010]
(2) Non-condensable gas is injected along the axis from above in the lower raw material downcomer by the noncondensable gas supply means, and in the lower raw material downcomer of water vapor, the second stage raw material feeder, the upper raw material downcomer, While preventing diffusion to the first-stage raw material feeder, the atmospheric pressure saturated steam at 100 ° C. is supplied into the jacket by the atmospheric pressure saturated steam supply means, and the lower raw material descending pipe and the raw material / gas supply pipe are maintained at 100 ° C. Prevents condensation of water vapor on the inner wall of the lower raw material downcomer and melting of the organic raw material in the raw material / gas supply pipe. Then, the organic raw material pulverized into fine particles is supplied to the raw material / gas supply pipe through the upper raw material downcomer by the first stage raw material feeder, and the raw material gas is generated in the same manner as in the above item (1).
[0011]
(3) In addition to the action of the above item (2), non-condensable gas is jetted along the axis from above in the upper raw material downcomer by the upper noncondensable gas supply means, Diffusion to the first stage raw material feeder is completely prevented.
[0012]
【Example】
FIG. 1 is a side view showing a concept of a partial gasification apparatus for organic matter such as waste plastic and a raw material supply apparatus according to a first embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member same as the conventional apparatus, and the overlapping description is abbreviate | omitted.
In FIG. 1, 1 is a first-stage screw feeder as a raw material feeder, and 2 is a second-stage screw feeder, which is provided on the inlet side of a raw material / gas supply pipe 56 via an upper raw material downcomer 4 and a lower raw material downcomer 6. It is installed. A noncondensable gas supply line 5 is mounted above the lower raw material downcomer 6. Outer outer surfaces of the lower raw material descending pipe 6, the raw material / gas supply pipe 56 and the mixed gas supply line 55 are covered with a heat trace jacket 7, and a saturated steam supply line 8 is attached to the heat trace jacket 7. Yes.
[0013]
For example, a non-condensable gas 11 such as carbon dioxide gas or nitrogen gas is injected from the non-condensable gas supply line 5 into the raw material downcomer pipe 6 along the axis thereof, and water vapor / oxygen supplied from the mixed gas supply line 55 While preventing the water vapor in the mixed gas 61 from diffusing into the lower raw material downcomer 6, the second stage screw feeder 2, the upper raw material downcomer 4, and the first stage screw feeder 1, the atmospheric saturated steam at 100 ° C. 12 is supplied from the saturated steam supply line 8 into the heat trace jacket 7, and the lower raw material descending pipe 6 and the raw material / gas supply pipe 56 are maintained at 100 ° C.
[0014]
Then, the organic raw material 60 in the raw material hopper 53 obtained by pulverizing the waste plastic into fine particles for promoting the reaction is supplied by the first stage screw feeder 1 to the second stage screw feeder 2 through the upper material downcomer 4. The second stage screw feeder 2 supplies the raw material / gas supply pipe 56 to the raw material / gas supply pipe 56 through the lower raw material downcomer 6 and supplies the steam / oxygen mixed gas 61 from the mixed gas supply line 55 to the raw material / gas supply pipe 56. The organic raw material 60 is conveyed to the gasification furnace 57 by the flow of the steam / oxygen mixed gas 61 and is reacted at a temperature of about 700 ° C. by the jet of the jet gas 62 as in the prior art to generate the raw material gas 63. .
[0015]
By preventing condensation to the lower raw material downcomer 6, the second stage screw feeder 2, the upper raw material downcomer 4 and the first stage screw feeder 1, the organic raw material 60 is prevented from adhering to these devices. Further, by holding the lower downcomer 6 and the raw material / gas supply pipe 56 at 100 ° C., the raw material / gas supply of the plastic organic raw material 60 that condenses the water vapor into the lower raw material downcomer 6 and melts at 110 ° C. or higher. Welding to the inner wall of the tube 56 is prevented.
[0016]
FIG. 2 is a side view showing the concept of a partial gasification apparatus for organic matter such as waste plastic and its raw material supply apparatus according to a second embodiment of the present invention.
This raw material supply device is provided with an upper non-condensable gas supply line 13 identical to the non-condensable gas supply line 5 of the first embodiment above the upper raw material downcomer 4 of the first embodiment. The gas supply line 5 is a lower non-condensable gas supply line 15.
[0017]
The non-condensable gas 11 is injected from the lower non-condensable gas supply line 15 into the lower raw material downcomer 6, and the lower downcomer 6 of the water vapor in the water vapor / oxygen mixed gas 61 supplied from the mixed gas supply line 55 and the first While preventing diffusion to the two-stage screw feeder 2, non-condensable gas 11 is also injected into the upper raw material downcomer pipe 4 from the upper noncondensable gas supply line 13, and the upper raw material downcomer pipe 6 of the steam and the first The diffusion to the stage screw feeder 1 is completely prevented.
[0018]
【The invention's effect】
The present invention has the following effects.
(1) By injecting non-condensable gas from above in the raw material downcomer along its axis, condensation by diffusion of water vapor into the raw material downcomer and into the raw material feeder, and fine organic material raw material by wetting with this condensed water Can be prevented.
Further, by condensing the atmospheric pressure saturated steam at 100 ° C. into the jacket and holding the raw material downcomer and the raw material / gas supply pipe at about 100 ° C., condensation of water vapor on the inner wall of the raw material downcomer and the condensed water In addition to preventing the adhesion of fine organic material due to wetting, it is possible to prevent welding of a plastic organic material having a melting point of 110 ° C. or higher to the material / gas supply pipe.
Therefore, blockage of the raw material downcomer and the raw material / gas supply pipe is prevented, and fine plastic organic material is smoothly supplied from the raw material feeder to the partial gasifier through the raw material downcomer and the raw material / gas supply pipe. Can do.
[0019]
(2) In addition to the effect of the item (1), the raw material feeder is a second-stage raw material feeder, the raw material downcomer is a lower raw material downcomer, and the first-stage raw material feeder is above the second-stage raw material feeder. Is provided via an upper raw material downcomer, and a non-condensable gas is injected downward from the upper part of the lower raw material downcomer along its axis, thereby lowering the lower raw material downcomer, the second stage raw material feeder, and the upper raw material. Diffusion to the downcomer and the first stage raw material feeder can be prevented.
[0020]
(3) In addition to the effect of item (2) above, the lower raw material of water vapor is lowered by injecting non-condensable gas from the upper part of the upper raw material downcomer pipe and the lower raw material downcomer pipe along the axis thereof. Diffusion to the tube and the first stage raw material feeder can be completely prevented.
[Brief description of the drawings]
FIG. 1 is a side view showing a concept of a partial gasification apparatus for organic matter such as waste plastic provided with a raw material supply apparatus according to a first embodiment of the present invention.
FIG. 2 is a side view showing the concept of a second embodiment of the present invention.
FIG. 3 is a side view showing a concept of a partial gasification apparatus for organic matter such as waste plastic and a raw material supply apparatus as an example of a conventional apparatus.

Claims (3)

In an apparatus for supplying plastic organic raw material to a partial gasification furnace using water vapor or a mixture of steam and combustion gas as a carrier medium gas, a raw material feeder, a raw material downcomer pipe provided below the outlet side of this raw material feeder, and this raw material descending A raw material / gas supply pipe connecting the lower part of the pipe and the gasification furnace, a carrier medium gas supply means provided on the inlet side of the raw material / gas supply pipe, and an axis of the pipe above the raw material downcomer pipe A non-condensable gas supply means for injecting a non-condensable gas, a jacket covering the outer surfaces of the raw material downcomer and the raw material / gas supply pipe, and an atmospheric pressure saturated steam supply means provided in the jacket. A raw material supply apparatus for an organic gasification furnace characterized by comprising: 2. The apparatus according to claim 1, wherein the raw material feeder is a second-stage raw material feeder, the raw material downcomer is a lower raw material downcomer, and the first-stage raw material feeder is disposed above the second-stage feeder via an upper raw material downcomer. A raw material supply apparatus for an organic gasifier characterized by being provided. 3. The apparatus according to claim 2, wherein the non-condensable gas supply means is a lower non-condensable gas supply means, and an upper non-condensable gas is injected above the upper material downcomer pipe toward the axis of the pipe. A raw material supply apparatus for an organic gasification furnace, comprising a property gas supply means.

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