JPH0226917Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a carbon monoxide gas generator including a gasifier that gasifies coke with high-purity oxygen.

[Conventional technology]

A gasifier for gasifying coke with high purity oxygen is known from Japanese Patent Publication No. 11331/1983. Since the carbon monoxide gas produced in such a gasifier is at a high temperature and contains solid particles such as ash and fine coke, it is necessary to cool this gas and separate the solid particles.

For this purpose, a waste heat boiler or bag filter is connected after the gasifier to cool the produced gas containing solid particles, and an electrostatic precipitator is connected after the waste heat boiler to separate the solid particles from the gas. is also publicly known (JP-A-56-86991 or 1983-
Publication No. 120703).

However, waste heat boilers themselves and their associated control equipment require costs that exceed the benefits obtained from heat recovery, and electrostatic precipitators require high-voltage power supplies, etc., so they are not economically viable. It is difficult to actually adopt it. Furthermore, there is a risk that the bag filter may be burned out by the high temperature gas, and an expensive bag filter made of metal fiber must be used.

[The problem that the idea aims to solve]

The object of the invention is to provide simple and inexpensive cooling of the gas produced by a gasifier and separation of solid particles.

[Means to solve the problem]

For this reason, according to the present invention, a bag filter is provided to separate solid particles contained in the produced gas exiting the gasifier, and a bag filter is provided that surrounds at least a part of the gas conduit connecting the gasifier and the bag filter to provide cooling water. A water-cooled jacket is provided, which is further controlled by a temperature controller to control the flow rate of cooling water passing through the water-cooled jacket, and a cooling water control valve that controls the flow rate of cooling water through the water-cooled jacket, and a gasifier and a bag filter at a temperature above a certain value of the produced gas. An emergency shutoff valve is provided to disconnect the emergency shutoff valve, and a release valve is provided upstream of the emergency shutoff valve and opens when the emergency shutoff valve is closed to release generated gas to the outside.

[Effect of idea]

Thus, according to the invention, it is only necessary to surround the conduit, which is present anyway, for connecting the gasifier and the bag filter with a water-cooled jacket.
Although the structure of the cooling device is simple, the gas can be cooled to a desired temperature by a cooling water control valve that controls the flow rate of cooling water. Even if the gas temperature becomes abnormally high, the emergency shutoff valve can be closed and the release valve can be opened to prevent this abnormally high temperature gas from reaching the baggage filter. There is an advantage that burnout can be reliably prevented even if a

〔Example〕

To explain an embodiment of the present invention with reference to the drawings, coke a is supplied to the upper part of the gasifier 2 from a supply tank 1 having a lock valve 11 at the inlet and outlet.
A fixed bed is formed in the gasifier 2 and gasified by high-purity oxygen gas b supplied from the bottom of the gasifier 2. Since this gasification reaction proceeds in the presence of excess carbon due to coke, highly pure carbon monoxide gas is produced according to the reaction formula C+1/2O ₂ →CO. The temperature in the reaction zone of gasifier 2 is 1400℃
~1700℃, locally reaching high temperatures of 2500℃, so some of the ash in the coke, which consists of oxides of iron, silicon, aluminum, magnesium, sodium, etc., evaporates, and when the temperature drops below 1000℃, it condenses. Or it solidifies and leaves from the upper part of the gasifier 2 together with the gas. The temperature of the generated gas is between 100℃ and 250℃, which varies depending on the internal conditions of the gasifier, but under normal conditions.
The temperature rises to about 120℃, and in abnormal situations it rises to about 250℃. The generated gas passes through a conduit 3 connected to the upper part of the gasifier 2 and enters dust removers 4 and 6, where the ash entrained in the gas is removed and then shut off as clean carbon monoxide gas c. It passes through the valve 14 and is sent to the refiner for the next step. Known bug filters are used as the dust removers 4 and 6, and the bug filter 4
Most of the ash g is removed from the gas and discharged via the lock hopper 5. If a large amount of ash accumulates on the cloth surface of the bag filter 4, the flow resistance increases, so clean carbon monoxide gas e from the purification device (not shown) is blown into the bag filter 4 through the gas valve 7. , brush off the ash that has accumulated on the surface of the cloth. A portion of the conduit 3 connecting the gasifier 2 and the bag filter 4 is surrounded by a water cooling jacket 8, and cooling water f is flowed into the annular space between the jacket 8 and the conduit 3 to cool the gas passing through the conduit 3. It is now possible to cool down. In order to prevent an excessive amount of cooling water from flowing, the opening degree of the cooling water control valve 15 is automatically adjusted by a temperature regulator (not shown). The inner surface of the conduit 3 is thermally sprayed with aluminum to make the wall surface dense and smooth so that ash in the gas does not adhere to it.

As mentioned above, the temperature of the gas exiting the gasifier 2 is normally about 120°C, but in abnormal circumstances it can reach 250°C. When the gas temperature becomes abnormally high,
Gas whose temperature exceeds the cooling capacity of the water flowing inside the water cooling jacket 8 enters the bag filter 4,
There is a risk of burning the cloth. To avoid this,
A temperature alarm switch (not shown) detects an abnormally high temperature of the gas, closes the emergency shutoff valve 12 in the conduit 3, disconnects the gasifier 2 and baggage filter 4, and opens the discharge valve 13 to prevent the high temperature. Temporarily releases gas d.

[Brief explanation of the drawing]

The drawing is a schematic diagram of the entire apparatus according to the present invention. 2... Gasifier, 3... Conduit, 4, 6... Bag filter, 8... Water cooling jacket, a... Coke, b... High purity oxygen, f... Cooling water.

Claims (1)

[Scope of utility model registration request] A gasifier 2 that gasifies coke with high-purity oxygen, a bag filter 4 that separates solid particles contained in the generated gas exiting the gasifier, and a gasifier 2
a water-cooled jacket 8 that surrounds at least a portion of the gas conduit 3 connecting the bag filter 4 and the bag filter 4 and is supplied with cooling water; a water control valve 15; an emergency shutoff valve 12 that disconnects the gasifier 2 and the bag filter 4 when the temperature of the generated gas exceeds a specific value;
A carbon monoxide gas generator characterized by comprising a release valve 13 which is provided on the upstream side and opens when the emergency shutoff valve 12 closes to release generated gas to the outside.