JPH0510914Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention relates to a plate-type EDC decomposition device used to decompose EDC (ethylene dechloride) to produce VCM (vinyl chloride monomer). .

[Conventional technology] Conventionally, this type of EDC decomposition equipment is
The furnace is equipped with a wide preheating zone and a reaction zone, and EDC is introduced inside a pipe that spans both zones to heat the outside of the pipe.
A heating furnace type system is used that heats and decomposes EDC to produce VCM.

[Problem that the invention aims to solve] However, in the conventional heating furnace type decomposition equipment,
In order to secure heat transfer area, it was made large, which caused the problem of a lot of waste.

Therefore, an object of the present invention is to provide a compact and inexpensive decomposition device by increasing the heat transfer area by using a plate type.

[Means for Solving the Problems] In order to achieve the above object, the present invention has a structure in which horizontally extending decomposition chambers and combustion chambers are vertically stacked alternately, and EDC is allowed to flow into the decomposition chambers. , Fuel and air are allowed to flow into the combustion chamber, and a flow path for supplying EDC and VCM are provided in the decomposition chamber.
The combustion chamber is configured to have an exhaust flow path, and a flow path on the fuel and air supply side and a flow path on the discharge side, respectively, communicating with the combustion chamber.

[Operation] When EDC is flowed into the decomposition chamber and fuel and air are flowed into the combustion chamber, the EDC in the decomposition chamber is decomposed by the heat generated by the gradual burning of the fuel, and VCM is produced within the decomposition chamber.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

Figures 1 to 3 show an embodiment of the present invention, in which a combustion gas heat exchange unit is installed on the upper side for heat recovery, and a fuel heat exchange unit is installed for fuel recovery on the lower side, with the reaction unit in between. The parts are arranged with a partition wall interposed between them, and are laminated.

The reaction section includes an empty decomposition chamber,
Combustion chambers 2 filled with combustion catalysts 3 are partitioned by partition walls 4 and stacked alternately, and both the decomposition chamber 1 and combustion chamber 2 have partition walls 4 stacked in the vertical direction, and It is formed in a space surrounded by internal hollow parts 6 of distance plates 5a and 5b, which are located between partition walls 4 and are hollowed out leaving a peripheral part. Each distance plate 5a, 5b has, on one side of its periphery,
Hole a that becomes the flow path for EDC (ethylene dechloride)
and holes b, which serve as flow paths for fuel and air, are provided alternately as shown in Figure 2, and on the other side of the periphery, undecomposed EDC and VCM (vinyl chloride monomer) produced by decomposition are arranged. Hole c that becomes the flow path for HC
The holes d, which serve as flow paths for exhaust gas, are provided alternately, and the holes a and c provided in the distance plate 5a of the decomposition chamber 1 are communicated with the inside of the decomposition chamber 1 through a fan-shaped cutout 7, and the EDC is connected to the holes. It enters the decomposition chamber 1 from a and is decomposed into undecomposed EDC and led to the hole c as VCM and HC. Similarly, the holes b and d provided in the distance plate 5b of the combustion chamber 2 are communicated with the combustion chamber 2 through the fan-shaped notch 8, so that fuel and air enter the combustion chamber 2 through the hole b, and exhaust gas flows through the holes. It is designed to lead to d.

In addition, the combustion gas heat exchange section is constructed by stacking distance plates 9 having internal hollow parts alternately with flat plates 10 in between, so that gas can be exchanged at the peripheral portions corresponding to the holes a, b, c, and d. The holes e, f, g, and h through which the flow flows are formed alternately, and the holes e in the distance plate 9 on one side of the plate 10 are formed alternately.
and h are opened at a fan-shaped notch so as to communicate with each other via an internal hollowed out part, and a hole f of the distance plate 9 located on the opposite side of the plate 10 is opened.
and g are opened at a fan-shaped cutout so as to communicate with each other via an internal cutout, so that the fuel and air supply side and return side pass through different passages.
Similarly, for the fuel heat exchange section, distance plates 11 having internal hollow parts are alternately stacked with flat plates 12 in between, and
Holes i and j, which serve as a flow path on the supply side of EDC, and holes k and l, which serve as flow passages on the discharge side of undecomposed EDC and decomposed products VCM and HC, are provided alternately, respectively.
The supply side and return side of the EDC should be routed through different paths.

Furthermore, on the upper side of the combustion gas heat exchange part, there is an upper part having an inlet 13 communicating with the hole g serving as a flow path for the fuel and air A, and an exhaust gas outlet 14 communicating with the hole e serving as the flow path for the exhaust gas B. There is a holder 15, and
On the lower side of the fuel heat exchange section, there is a lower holder 18 having an EDC inlet 16 communicating with a hole i serving as an EDC flow path and a VCM outlet 17 communicating with a hole l serving as a VCM flow path, The upper and lower holders 15 and 18 are tightened to integrate them.

Note that the partition wall also has holes in its periphery, but the partition wall has only holes m and n corresponding to the combustion gas f and h, and the partition wall has holes j and k for EDC. Only the corresponding holes o and p are provided.

When EDC is introduced from the inlet 16 of the lower holder 18, the EDC is guided from hole i through the supply side passage of each stage of the fuel heat exchange section to hole j, ascends through hole j and enters the reaction section. , enters the decomposition chamber 1 from the hole a in the reaction section.

On the other hand, fuel and air A supplied from the inlet 13 of the upper holder 15 are guided from the hole g to the hole f through the passage on the supply side of each stage of the combustion gas heat exchange section, and descend through the hole f. It enters the reaction section and enters the combustion chamber 2 through hole b in the reaction section.

The combustion chamber 2 is filled with a combustion catalyst 3, so as the fuel and air A are flowed here, the fuel starts to gradually burn, decomposing the EDC supplied into the decomposition chamber 1. The necessary heat is generated, and this heat decomposes the EDC in the decomposition chamber 1.
VCM is produced. That is, the reaction C ₂ H ₄ C ₂ →CH ₂ =CHC+HC is performed.

VCM and HC obtained above and undecomposed EDC
enters the hole c from the decomposition chamber 1, descends, enters the hole l through the return side passage in the fuel heat exchange section, and is taken out from the outlet 17.

The combustion gas used to heat the EDC in the combustion chamber 2 enters the hole d from the combustion chamber 2, rises, passes through the passage on the return side of the combustion gas heat exchange section, passes through the hole e, and exits the outlet 14 as exhaust gas. It is discharged.

In the above, in the combustion gas heat exchange section, heat exchange is performed between the gas on the supply side and the gas on the return side, and the heat of the exhaust gas is used to preheat the fuel and air supplied to the combustion chamber 2, and the heat is recovered. will be held. On the other hand, in the fuel heat exchange section, the fuel flows through the supply side and return side passages.
Heat exchange takes place between EDC and VCM.

The flow of the gases, EDC, etc. explained above is shown in Fig. 3 in an easy-to-understand manner.

It should be noted that the present invention is not limited to the above-mentioned embodiment. For example, the combustion chamber 2 is shown to be filled with a combustion catalyst 3, but it goes without saying that a combustion gas may be used instead of the combustion catalyst 3. It is.

[Effects of the invention] As described above, according to the plate-type EDC decomposition device of the invention, the decomposition chamber and the combustion chamber are vertically stacked alternately, and the EDC supplied to the decomposition chamber is combined with the fuel flowing into the combustion chamber. Since it is decomposed using the heat generated by combustion of air, it is compact and can decompose EDC to produce VCM.
Also, the fuel and air gradually burn in the combustion chamber.
Since the heat necessary for decomposing EDC is supplied, the fuel zone is also kept at a relatively low temperature, allowing the use of inexpensive materials and providing the excellent effects of enabling a compact and inexpensive decomposition device.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view showing an embodiment of the present invention;
FIG. 2 is an exploded view of each part shown in FIG. 1, and FIG. 3 is a schematic diagram showing the flow of gas, EDC, etc. ...reaction section, ...combustion gas heat exchange section, ...
... Fuel heat exchange section, ... Partition wall, 1 ... Decomposition chamber, 2 ... Combustion chamber, 3 ... Combustion catalyst, 4 ... Partition wall.

Claims (1)

[Scope of utility model registration request] Decomposition chambers and combustion chambers extending in the horizontal direction are stacked alternately in the vertical direction, so that EDC flows into the decomposition chamber, fuel and air flow into the combustion chamber, and EDC flows into the decomposition chamber. A plate type characterized in that a supply flow path and a VCM discharge flow path are communicated with each other, and a flow path on the supply side and a flow path on the discharge side of fuel and air are communicated with the combustion chamber, respectively.
EDC decomposition equipment.