JPH08296973A - Furnace bottom residue discharging apparatus for organic matter gasifying furnace - Google Patents

Abstract

PURPOSE: To prevent an injection hole from being clogged owing to residues by providing a water seal injecting gas supply tube on the lower portion of a furnace bottom opening part, and further providing a furnace bottom partition plate having the injection hole with a smaller cross section than that of the furnace bottom opening part for providing a predetermined injection speed to the injecting gas such that the partition plate is opened/closed in a furnace bottom chamber. CONSTITUTION: A furnace bottom opening part 51b is provided on the lowest part of a furnace bottom part 51a of a gasifying furnace 51 which has a cross section enough to fall down residues 64, and a furnace bottom chamber 1 is disposed on the lower part of the lowest part of the furnace bottom part. An injection outlet 2a is formed in a furnace bottom partition plate 2 which has an opening area capable of providing a predetermined injection speed to injecting gas 62. The furnace bottom partition plate is accommodated in the furnace bottom chamber 1 so as to open downward with the aid of a rotary shaft 3, an arm 5, and a hydraulic cylinder 4. An injecting gas supply tube 8 dipped in a water seal tank 51 in its lower end is disposed on the lower part of the furnace bottom chamber 1, and an injecting gas supply line 56 is mounted on the injecting gas supply pipe 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom residue discharge device for a partial gasification furnace for organic substances (heavy oil, residual oil, plastic, etc.).

[0002]

2. Description of the Related Art FIG. 6 is a side view showing the concept of an example of a conventional spouted bed type organic partial gasification furnace. As shown
When starting the apparatus, the gasification furnace 51 is preheated to about 700 ° C. by the preheating device 58. Next, the jet gas supply line 56
From the gasification furnace 51 via a jet gas supply pipe 55 sealed by a water sealing tank 57, for example, a jet gas 62 which is an inert gas such as nitrogen gas or carbon dioxide gas.
Is supplied at room temperature and blown up from the furnace bottom portion 51a, and a steam / oxygen (oxygen is a combustion-supporting gas) supply line 52 and a raw material supply device 54 are mixed with a steam / oxygen mixed gas 61 and an organic raw material 60 obtained by crushing, for example, plastic waste. The organic material raw material 60 and the steam are reacted and gasified by the jet flow of the jet gas 62 in the gasification furnace 51 and oxygen, and the raw material gas 63 for methanol synthesis is generated.
The temperature of around 700 ° C. is maintained in the gasification furnace 51 by this reaction heat.

[0003]

In the above-mentioned conventional jet bed type gasification furnace 51, the jet gas 62 is supplied to the furnace bottom portion 51a.
It is necessary to set the gas velocity when the gas is blown up into the furnace from the jet speed in the furnace or higher. Further, since the inert gas at room temperature that does not participate in the reaction is used as the jet gas 62, if the flow rate increases, the temperature of the reaction field decreases and the gasification reaction cannot be maintained. On the other hand, since the jet velocity needs to be a certain value or more, in order not to reduce the jet flow velocity of the jet gas 62, the sectional area of the jet port of the furnace bottom part 51a (the diameter of the jet gas supply pipe 55) Needs to be set small. Therefore, foreign matter such as plastic waste pieces that have not been gasified in the gasification furnace 51, ash attached to the waste, and metals drop to the furnace bottom 51a and the residue 64
Therefore, in some cases, the residue 64 may block the jet port and hinder the operation. In view of the above-mentioned state of the art, the present invention aims to provide a bottom residue discharge device for an organic matter gasification furnace capable of preventing clogging of a jet port due to a residue as in the prior art.

[0004]

[Means for Solving the Problems] The structure of the apparatus for discharging the bottom residue of an organic matter gasification furnace according to the present invention for solving the above problems is as follows.

(1) In a gasification furnace for organic matter, in which steam, combustion-supporting gas and organic material raw material are supplied into a high temperature furnace and a partial gasification reaction is caused by a jet flow in the furnace to produce a raw material gas for methanol synthesis A bottom opening is provided at the bottom of the bottom of the gasification furnace, the bottom opening having a horizontal cross-sectional area sufficient to drop the bottom residue, and a horizontal cross-sectional area sufficient to drop the bottom residue is formed. A water-sealed jet gas supply pipe whose lower end is immersed in a water-sealed tank is provided below the furnace bottom opening, and a furnace bottom chamber is interposed between the furnace bottom opening and the jet gas supply pipe. And a furnace bottom partition plate having a cross-sectional area smaller than that of the furnace bottom opening and having a jet port for imparting a predetermined jetting speed to the jet gas, is provided so as to open and close in the furnace bottom chamber. Residue bottom discharge device for organic gasifier.

(2) In the apparatus of the above item (1), a jet gas pressure detecting means is provided in the jet gas supply pipe or the furnace bottom chamber, and the partition plate is automatically operated by the jet gas pressure detection value. A furnace bottom residue discharging device for an organic matter gasification furnace, characterized in that a partition plate opening / closing means for opening / closing is provided.

(3) In a gasification furnace for organic matter, in which steam, combustion-supporting gas, and organic material raw material are supplied into a high-temperature furnace, and a partial gasification reaction is caused by a jet flow in the furnace to produce a raw material gas for methanol synthesis. A bottom opening is provided at the bottom of the bottom of the gasification furnace, the bottom opening having a horizontal cross-sectional area sufficient to drop the bottom residue, and a horizontal cross-sectional area sufficient to drop the bottom residue is formed. A water-sealed jet gas supply pipe whose lower end is immersed in a water-sealed tank is provided below the furnace bottom opening to give a predetermined jetting speed to the jet gas with a cross-sectional area smaller than that of the furnace bottom opening. A furnace bottom residue discharge device for an organic matter gasification furnace, characterized in that a furnace bottom partition plate having a jet outlet is provided so as to open and close in the jet gas supply pipe.

(4) In the apparatus of the above item (3), a jet plate gas pressure detecting means is provided in the jet gas supply pipe, and a partition plate opening / closing is provided for automatically opening / closing the partition plate according to the jet gas pressure detection value. An apparatus for discharging bottom residue of an organic matter gasification furnace, characterized in that it is provided with means.

[0009]

The jet gas is spouted from the jet gas supply pipe and the jet port of the furnace bottom partition plate to the lowermost portion of the bottom of the gasification furnace at a predetermined jet speed to generate a jet flow in the furnace, and at the same time, steam, A combustion-supporting gas (oxygen-containing gas such as oxygen or air) and an organic material are supplied into a high-temperature furnace, and the organic-material raw material and steam are reacted by the combustion-supporting gas to be gasified, for example, a raw material gas for methanol synthesis is generated. To do. The temperature required for the reaction is maintained in the gasification furnace by this reaction heat. At the bottom of the bottom of the furnace, that is, on the top of the bottom partition plate, organic pieces that have not been gasified in the furnace, ash adhering to this organic matter, and foreign substances such as metals fall and accumulate as the bottom residue of the furnace. Trying to close the opening. When the opening area of this furnace bottom opening becomes smaller than the jet port of the furnace bottom partition plate, the furnace bottom partition plate is opened in the furnace bottom chamber or in the jet gas supply pipe, and the furnace bottom residue is passed through the furnace bottom chamber to the jet gas. The gas is dropped from the supply pipe or directly from the jet gas supply pipe to the water seal tank to prevent the jet gas from being jetted at a low velocity, that is, the in-furnace jet velocity to be reduced. When the bottom residue is removed by dropping, the bottom partition plate is returned below the bottom opening, and the gasification furnace is returned to normal operation.

In addition to the above operation, the pressure in the jet gas supply pipe or in the furnace bottom chamber is continuously detected by the jet gas pressure detection means. When this detected value exceeds the preset upper pressure limit, the bottom residue accumulates on the upper surface of the bottom partition plate,
Since the opening area of the furnace bottom opening is smaller than the jet outlet of the furnace bottom partition plate, the partition plate opening / closing means automatically opens the furnace bottom partition plate to remove the bottom residue from the jet gas supply pipe. It is dropped in a sealed tank to prevent the jetting speed of the jetting gas, that is, the jetting speed in the furnace from dropping.

[0011]

FIG. 1 is a side view showing the concept of a spouted bed type organic matter partial gasification furnace equipped with a furnace bottom residue discharging apparatus according to the first embodiment of the present invention, and FIG. 4 is a side view showing the state of FIG. 3, FIG. 3 is a block diagram showing the configuration of the controller, FIG.
Is a flow chart summarizing the procedure. The same members and parts as those of the conventional device are denoted by the same reference numerals, and redundant description will be omitted.

1 and 2, a furnace bottom 51a of the gasification furnace 51 is provided with a furnace bottom opening 51b having a cross-sectional area sufficient for dropping the residue 64 at the bottom, and further below the furnace bottom 51a. A chamber 1 is arranged. A preheating device 58 and a pressure detector 7 are attached to the furnace bottom chamber 1, and the pressure detector 7 transmits a detection signal to the switching valve 6 of the hydraulic cylinder 4 via the controller 10. Reference numeral 2 denotes a furnace bottom partition plate, which is provided with a jet port 2a having an opening area capable of imparting a predetermined jet velocity to the jet gas 62, and is opened downward by a rotary shaft 3, an arm 5 and a hydraulic cylinder 4. Is housed in the hearth chamber 1. Below the furnace bottom chamber 1, a jet gas supply pipe 8 whose lower end is immersed in a water seal tank 57
A jet gas supply line 56 is attached to the jet gas supply pipe 8.

As shown in FIG. 3, the controller 10 receives a detection signal from the pressure detector 7 and compares it with a pressure upper limit value to perform a calculation operation, and a pressure upper limit storage unit 12 that stores the pressure upper limit value. And a switching valve operation instructing section 1 for operating the switching valve 6.
3.

At the time of starting the apparatus, hot air is supplied from the preheating device 58 into the gasification furnace 51 through the furnace bottom chamber 1 and the jet port 2a to preheat the gasification furnace 51 to about 700.degree. Next, a jet gas 62, which is an inert gas such as nitrogen gas or carbon dioxide gas, is introduced from the jet gas supply line 56 into the gasification furnace 51 through the jet gas supply pipe 8 and the furnace bottom chamber 1 from the jet outlet 2a. A jet flow is generated in the furnace 51, and a steam / oxygen mixed gas 61 and an organic material raw material 60 obtained by crushing, for example, plastic waste are supplied from the steam oxygen supply line 52 and the raw material supply device 54 to heat and heat the furnace. Oxygen reacts the organic material raw material 60 with water vapor to gasify it and generate a raw material gas 63 for methanol synthesis.
The inside of the gasification furnace 51 during steady operation is heated by this reaction heat to 7
The temperature is maintained around 00 ° C.

On the upper surface of the furnace bottom partition plate 2 of the furnace bottom 51a,
Plastic waste pieces that have not been gasified in the gasification furnace 51 and foreign substances such as ash and metals attached to this waste fall to form a residue 64 and deposit as shown in FIG. Try to block. This furnace bottom opening 5
When the opening area of 1b becomes smaller than the ejection port 2a of the furnace bottom partition plate 2, the pressure in the furnace bottom chamber 1 rises.

The pressure detector 7 continuously detects this pressure and sends it to the controller 10. The detection value comparison unit 11 receives the detection value and performs a comparison calculation with the pressure upper limit value that is input in advance in the pressure upper limit storage unit 12. When the detection value exceeds the pressure upper limit value, the switching valve operation instructing unit 13 As shown in FIG. 2, the switching valve 6 is actuated, the furnace bottom partition plate 2 is opened downward, and the residue 64 is dropped from the jet gas supply pipe 8 to the water sealing tank 57. When the residue 64 drops after a lapse of a predetermined time, the switching valve operation instructing section 13 causes the switching valve 6 to move as shown in FIG.
Is operated to return the bottom plate 2 to the original state. The procedure for partial gasification of organic substances and removal of residue from the bottom of the furnace is summarized in FIG.

FIG. 5 is a side view showing the outline of a spouted bed type organic matter partial gasification furnace equipped with a furnace bottom residue discharging apparatus according to a second embodiment of the present invention. In this gasification furnace, the furnace bottom chamber 1 of the first embodiment is omitted, the pressure detector 7 is attached to the jet gas supply pipe 28 to detect the pressure, and the furnace bottom partition plate 22 is supplied to the jet gas. The residue 64 is dropped by sliding horizontally on the upper portion of the pipe 28 to open it. Note that, in FIG. 5, the same parts as those in FIG.

[0018]

The present invention has the following effects. (1) A furnace bottom opening having a cross-sectional area sufficient to drop the bottom residue is provided at the bottom of the bottom of the gasification furnace, and the bottom end is a water sealing tank with a cross-sectional area sufficient to drop the bottom residue. A jet gas supply pipe to be immersed in the furnace is installed below the furnace bottom opening, and if necessary, a furnace bottom chamber is interposed between the furnace bottom opening and the jet gas supply pipe. The bottom of the furnace bottom partition plate is provided so as to open and close within the furnace bottom chamber or the gas supply pipe for the jet flow, and the bottom of the furnace bottom is provided on the upper surface of the furnace bottom partition plate. When residue accumulates, it is possible to open the furnace bottom partition plate and drop the furnace bottom residue from the furnace bottom chamber and jet gas supply pipe into the water seal tank. The gasification amount can be prevented from decreasing and the gasifier can be operated normally.

(2) In addition to the effect of item (1), a jet gas pressure detecting means is provided in the jet gas supply pipe or the furnace bottom chamber, and the partition plate is automatically operated by the jet gas pressure detection value. By providing the partition plate opening and closing means to open and close,
When the pressure detection value in the jet gas supply pipe continuously detected by the jet gas pressure detection means or the pressure detection value in the furnace bottom chamber exceeds a preset upper limit pressure, the furnace bottom partition plate is automatically opened by the partition plate opening / closing means. It becomes possible to open and drop the bottom residue from the jet gas supply pipe into the water seal tank, prevent the jet gas ejection amount from decreasing due to the reduction of the opening area of the furnace bottom opening, and prevent gasification furnace operation. Can contribute to automation.

[Brief description of drawings]

FIG. 1 is a side view showing the concept of a spouted bed type organic matter gasification furnace equipped with a furnace bottom residue discharging apparatus according to a first embodiment of the present invention.

FIG. 2 is a side view showing the state of the apparatus of FIG. 1 when discharging the bottom residue.

FIG. 3 is a block diagram showing a configuration of a controller of FIGS. 1 and 2.

FIG. 4 is a flow chart summarizing the procedure of partial gasification of organic matter and discharge of bottom residue.

FIG. 5 is a side view showing the concept of a spouted bed type organic matter gasification furnace equipped with a furnace bottom residue discharging apparatus according to a second embodiment of the present invention.

FIG. 6 is a side view showing the concept of an example of a conventional spouted bed type organic matter gasification furnace.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Masaki Hirano 3-3-22 Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture Kansai Electric Power Co., Inc. (72) Tadashi Tsunono 3-chome Nakanoshima, Kita-ku, Osaka City, Osaka Prefecture No. 22 in Kansai Electric Power Co., Inc. (72) Koichi Yonezawa 4-3 33, Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture China Electric Power Co., Ltd. (72) Masanori Ogaku 4-33, Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Chugoku Electric Power Co., Inc. (72) Inventor Kenji Tokumasa 4-33 Komachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Chugoku Electric Power Co., Inc. (72) Yoshifumi Ito 4-4-2, Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Inside the Hiroshima Works (72) Kenji Ariya, Kenji Shinya 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Ltd. Hiroshima Research Institute (72) Inventor Masato Kaneko Hiro Prefecture of Hiroshima Nishi-ku Kan'onshin-cho, chome No. 6 No. 22 Mitsubishi Heavy Industries, Ltd. Hiroshima within the Institute

Claims (4)

[Claims] 1. A gasification furnace for an organic substance, in which steam, combustion-supporting gas, and an organic material raw material are supplied into a high-temperature furnace, and a partial gasification reaction is caused by a jet flow in the furnace to produce a raw material gas for methanol synthesis. A bottom bottom opening having a horizontal cross-sectional area sufficient to drop the residue is provided at the bottom of the bottom of the gasification furnace, and a horizontal cross-sectional area sufficient to drop the bottom residue is formed to form a lower end. A water-sealed jet gas supply pipe whose part is immersed in a water-sealed tank is provided below the furnace bottom opening, and a furnace bottom chamber is interposed between the furnace bottom opening and the jet gas supply pipe. A furnace bottom partition plate having a cross-sectional area smaller than that of the furnace bottom opening and having a jet port for imparting a predetermined jetting speed to the jet gas is provided so as to open and close in the furnace bottom chamber. Residue bottom discharge device for organic gasifier. 2. The partition according to claim 1, wherein the jet gas supply pipe or the furnace bottom chamber is provided with jet gas pressure detection means, and the partition plate is automatically opened and closed according to the jet gas pressure detection value. A bottom discharge device for an organic matter gasification furnace, characterized in that it is provided with a plate opening / closing means. 3. A gasification furnace for an organic substance, in which steam, combustion-supporting gas, and organic material raw material are supplied into a high-temperature furnace, and a partial gasification reaction is caused by a jet flow in the furnace to produce a raw material gas for methanol synthesis. A bottom bottom opening having a horizontal cross-sectional area sufficient to drop the residue is provided at the bottom of the bottom of the gasification furnace, and a horizontal cross-sectional area sufficient to drop the bottom residue is formed to form a lower end. A water-sealed jet gas supply pipe whose portion is immersed in a water-sealed tank is provided below the furnace bottom opening, and a predetermined jetting speed is given to the jet gas with a cross-sectional area smaller than that of the furnace bottom opening. A furnace bottom residue discharging device for an organic matter gasification furnace, characterized in that a furnace bottom partition plate having a jet port is provided so as to be opened and closed in the jet gas supply pipe. 4. The apparatus according to claim 3, wherein the jet gas supply pipe is provided with jet gas pressure detection means, and partition plate opening / closing means is provided for automatically opening / closing the partition plate according to the jet gas pressure detection value. A bottom discharge device for organic gasification furnaces.