JPH08982Y2 - Endothermic gas generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an endothermic gas generator.

An endothermic gas containing carbon monoxide, hydrogen and nitrogen as main components is used as the atmosphere gas for heat treatment. The endothermic gas is produced by using an endothermic gas generator and heating a mixed gas of hydrocarbon gas such as propane, butane or natural gas and air at high temperature in the presence of a catalyst.

The present invention relates to an improvement of the endothermic gas generator described above.

<Prior art and its problems> Conventionally, as an endothermic gas generator, generally, a heating chamber surrounded by a heat insulating material is equipped with a heater and a retort filled with a catalyst, and a blower is provided upstream of the retort. Is used, and a delivery system with a gas cooler is connected to the downstream side of the retort.

However, in such a conventional endothermic gas generator, in practice, the amount of the endothermic gas generated cannot be reduced to, for example, 1/5 or 1/10 of the maximum amount of the endothermic gas generator. There is a problem. For example, in the case where one endothermic gas generator supplies the endothermic gas required for five heat treatment furnaces, the endothermic gas generator requires the maximum endothermic gas generation amount for the five heat treatment furnaces. Enough is installed to cover the total amount of endothermic gas. In this case, if only one heat treatment furnace is operated for convenience, the amount of endothermic gas generated by the endothermic gas generator will be reduced to 1/5 of its maximum amount. In actuality, such a reduction cannot be achieved by the gas generator. The endothermic gas generator is equipped with a retort, a gas cooler, and other equipment of a capacity commensurate with the maximum amount of endothermic gas generated by this, but it is possible to make these follow a reduction exceeding the above limit. For example, the residence time of the gas in the retort under high temperature heating filled with the catalyst cannot be adjusted as desired, and as a result, the desired endothermic gas cannot be generated. Is. Even if the endothermic gas required for one heat treatment furnace is covered by one endothermic gas generator, the amount of the endothermic gas required varies greatly depending on the processing conditions of the heat treatment furnace. So it happens as well.

<Problems to be Solved by the Invention, Means for Solving the Problems> The present invention provides an improved endothermic gas generator which solves the above-mentioned conventional problems.

Therefore, according to the present invention, a heating chamber surrounded by a heat insulating material is equipped with a heater and two or more retorts filled with a catalyst, and a first blower is provided upstream of one retort. A second feed which is connected to one feed line and is connected to one or more of the retorts through a branch feed line, if necessary, through a common second blower. An endothermic gas generator (hereinafter referred to as the first invention) in which a system is connected and a branch delivery system having a gas cooler is connected to the downstream side of all the retorts, and is surrounded by a heat insulating material. The heating chamber is equipped with a heater and two or more retorts filled with a catalyst, and a delivery system having a common blower is connected to the upstream side of the retort via a branch delivery system. One or more of the retorts other than one of the retorts A sluice valve is installed in each of the branch inlet / outlet systems connected to, and an endothermic gas generator (hereinafter, referred to as a branching / outlet system in which each of the retorts is connected to a branch delivery system in which a gas cooler is installed). The second
It is called a device).

<Operation> In the first invention, when the total number of retorts is 4, for example, the operation of the second blower of the second feeding system is stopped,
Without using the three retorts connected to the second feeding system, only the first blower of the first feeding system is operated and connected to the first feeding system. When only one retort is used, the amount of endothermic gas produced is reduced to 1/4 of the maximum amount produced by four retorts. Normally, the amount of endothermic gas produced by one retort can be reduced to almost 1/3 of its maximum amount. Therefore, if the amount of mixed gas sent to one retort is reduced to approximately 1/3 in the above case. , The amount of endothermic gas generated is reduced to almost 1/12 of the maximum amount generated by the four retorts. Therefore, according to the first invention in the case where the total number of retorts is four, for example, the amount of mixed gas to be fed to one retort connected to the first feeding system and the connection to the second feeding system. The amount of endothermic gas produced is adjusted from the maximum amount by adjusting the amount of mixed gas to be fed into the three retorts.
It can be arbitrarily reduced within the range of 1/12.

Similarly, in the second invention, the total number of retorts is, for example, 4
If it is a book, the blower is operated, each sluice valve of the branch feeding system is closed, and the three retorts connected to the branch feeding system are not used, but the remaining branch system is connected 1 Using only two retorts reduces the amount of endothermic gas produced to 1/4 of the maximum produced by four retorts.
As in the case of the first invention, if the amount of the mixed gas fed into one retort is reduced to about 1/3 in the above, the amount of endothermic gas produced is about 1/12 of the maximum amount produced by the four retorts. Reduce to. Therefore, according to the second invention when the total number of retorts is four, as in the case of the first invention, the amount of endothermic gas generated can be arbitrarily reduced within the range of about 1/12 from the maximum amount. is there.

First invention and second invention when the total number of retorts is four
Although the operation of the invention has been described, it is needless to say that the total number of retorts is two or more, and as the number of retorts increases, the amount of endothermic gas generated can be reduced over a wider range and more accurately.

Hereinafter, the configurations of the first and second inventions will be described in more detail with reference to the drawings.

<Embodiment> FIG. 1 is a schematic view of the essential portions of an embodiment of the first invention. A heating chamber 21 surrounded by a heat insulating material 11 is equipped with a heater 31 and four retorts 41 to 44 filled with a catalyst (not shown). A first feeding system 61 with a first roots blower 51 interposed is connected to the upstream side of one retort 41. Further, a second feeding system 62 having a common second roots blower 52 interposed therebetween is connected to the upstream sides of the other three retorts 42 to 44 via branch feeding systems 62a to 62c. Further, branch delivery systems 81a to 81d, which interpose gas coolers 71 to 74, respectively, are connected to the downstream sides of the four retorts 41 to 44, and the branch delivery systems 81a to 81d are joined on the downstream side.

FIG. 2 is a schematic view of an essential part showing an embodiment of the second invention. The heating chamber 22 surrounded by the heat insulating material 12 is equipped with a heater 32 and four retorts 45 to 48 filled with a catalyst (not shown). On the upstream side of the four retorts 45 to 48, a delivery system 63 is connected via branch delivery systems 63a to 63d with a common roots blower 53 interposed therebetween. In addition, the branch feeding systems 63b to 63d connected to the other three retorts 46 to 48 excluding one retort 45 each have a solenoid valve 91 to
93 is installed. Further, branch delivery systems 82a to 82d interposing gas coolers 75 to 78 are connected to the downstream sides of the four retorts 45 to 48, respectively, and the branch delivery systems 82a to 82d are joined on the downstream side.

Each illustrated embodiment is a case where the total number of retorts is four, but the number of retorts other than one retort 41 in FIG. 1 and the other retorts except one retort 45 in FIG. The number of each may be one or more. In each illustrated embodiment, a straight tube type retort is used for convenience, but the retort may be a U-shaped tube. In addition, in FIG.
No solenoid valve is installed in a, but
Similar to 3b to 63d, a solenoid valve may be provided here. Although not shown, in each embodiment, the amount of the mixed gas fed into each retort may be adjusted by detecting the pressure on the downstream side of the gas cooler to control the rotation speed of the roots blower, or the roots blower. It is also possible to adopt a method in which a part of the mixed gas is sent back to the upstream side of the roots blower by detecting the pressure on the downstream side of the retort. You can

<Effect of Device> As is apparent, the present invention described above has an effect that the amount of endothermic gas generated can be arbitrarily reduced.

[Brief description of drawings]

FIG. 1 and FIG. 2 are schematic views of essential parts showing one embodiment of the present invention separately. 11,12 …… Insulation material, 21,22 …… Heating chamber 31,32 …… Heater, 41 ～ 48 …… Retort 51 ～ 53 …… Roots blower 61 ～ 63 …… Sending system 62a ～ 62c, 63a ～ 63d… … Branch feeding system 71-78 …… Gas cooler 81a-81d, 82a-82d …… Branching delivery system 91-93 …… Solenoid valve

Continuation of front page (72) Inventor Yasuhiro Murai 66, Exit, Kotaji, Shikatsu-cho, Nishikasugai-gun, Aichi (56) References JP-A-2-22412 (JP, A) SAI 511-111947 (JP, U)

Claims (2)

[Scope of utility model registration request] 1. A heating chamber surrounded by a heat insulating material is equipped with a heater and two or more retorts filled with a catalyst, and a first blower is provided upstream of one retort. Second feed system in which a second blower common to them is connected to the above-mentioned retort via a branch feed system, if necessary, on the upstream side of the one or more other retorts. The endothermic gas generator is connected to each of the retorts, and is connected to the downstream side of all the retorts with a branch delivery system having a gas cooler interposed therebetween. 2. A heating chamber surrounded by a heat insulating material is equipped with a heater and two or more retorts filled with a catalyst, and a common blower is provided upstream of the retort via a branch feeding system. A delivery valve to be installed is connected, and a sluice valve is provided in each of the branch delivery systems connected to one or more retorts other than the one retort. An endothermic gas generator comprising a branch delivery system connected to the downstream side of each of the gas coolers.