JPH051301Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a laser light reactor that utilizes the high energy of laser light to carry out chemical reactions.

[Prior Art] In general, chemical reactions involve activating the molecules of a substance by placing it under conditions of high temperature and high pressure.
This is done by increasing the frequency of collisions between material molecules.

On the other hand, in recent years, laser light reactors have been studied that use the high energy of laser light to excite material molecules and cause chemical reactions at room temperature and pressure, or under conditions close to this.

An example of such a laser light reactor is shown in FIG.

An entrance window 3 and an exit window 4 each having a quartz glass 2 or the like having high light transmittance attached thereto are protrudingly provided at opposing positions on both end faces of the reactor body 1 which stores unreacted substances in the form of liquid or slurry. An inlet 5 for supplying unreacted substances is installed on the top surface of the reactor body 1.
A recovery line 7 for recovering reaction product materials equipped with a drain valve 6 is connected to the bottom of the reactor body 1, a stirrer 8 rotated by a drive device (not shown) is installed inside the reactor body 1, and a pump 9 is installed outside the reactor body 1. A circulation line 1 connecting the lower and upper parts of the reactor body 1 with
Connect 0.

In such a laser photoreactor, first the inlet 5
After supplying unreacted substances in liquid or slurry form into the reactor main body 1, a drive device (not shown) operates the stirrer 8 to stir the unreacted substances, and at the same time operates the pump 9 to feed the circulation line 10. The reactor main body 1 is circulated by circulating unreacted substances.
By causing a flow of unreacted substances within the interior of the chamber, and then irradiating the laser beam from the entrance window 3 toward the exit window 4 to irradiate the unreacted substances that are causing the flow, the laser beam is applied. The unreacted substances are excited by the high energy of laser light and heated to room temperature.
Chemical changes are made in unreacted substances near normal pressure to obtain reaction products.

The reaction product produced as a result of the chemical reaction is taken out from the recovery line 7 by opening the drain valve 6.

[Problem to be solved by the invention] However, in the above-mentioned laser photoreactor,
The recovery line 7 and the circulation line 10 were separately provided to form two systems, but since the recovery line 7 must be equipped with a drain valve 6 to recover the reaction product, it is necessary to install the drain valve 6 above the recovery line 7. Since the unreacted substances remain in the reactor and the unreacted substances are not exposed to the laser beam, the reaction rate of the unreacted substances causing chemical changes is low (in other words, the efficiency of the laser light reactor is poor and Ta).

Therefore, in order to increase the reaction rate in which unreacted substances undergo chemical changes, the drain valve 6 must be closed at regular intervals.
Either the drain valve 6 is not provided in the recovery line 7 and a pump is installed instead to remove the unreacted substances that have accumulated in the recovery line 7. It is conceivable to continuously circulate the unreacted material from the collection line 7 to the inlet 5 etc. to prevent it from accumulating. In the latter case, the recovery line 7 becomes substantially the same as the circulation line 10, making it impossible to recover the reaction product.

In addition, when the pressure inside the reactor main body 1 is controlled to be constant, the drain valve 6 may be opened to reinject unreacted substances accumulated in the recovery line 7 from the inlet 5 as described above, or the recovery line When sampling from 7 and opening the drain valve 6 to check the progress of the chemical reaction, since the recovery line 7 is directly connected to the reactor main body 1,
There was a risk that the internal environment of the reactor body 1 would change significantly.

In view of the above-mentioned circumstances, the purpose of this invention is to increase the reaction rate by eliminating the accumulation of unreacted substances in the recovery line, and also to eliminate the impact on the internal environment even when sampling etc. are performed. It is something.

[Means for solving the problem] The present invention provides a laser beam entrance window in the reactor body containing unreacted substances in liquid or slurry form,
A stirrer is provided inside the reactor main body, and a circulation line equipped with a drain valve, a pump, and a first switching valve is connected between the lower and upper parts of the reactor main body, and a circulation line is connected between the pump and the first switching valve in the circulation line. This invention relates to a laser photoreactor characterized in that a recovery line equipped with a second switching valve is connected to the laser light reactor.

[Operation] Since the recovery line is provided in the middle of the circulation line to integrate the two, unreacted substances are circulated through the circulation line, and there is no accumulation of unreacted substances in the recovery line.

Furthermore, since the recovery line is indirectly connected to the reactor main body via the circulation line, even if sampling is performed, the influence on the internal environment of the reactor main body is small.

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

FIG. 1 shows one embodiment of the present invention, and the parts in the figure with the same reference numerals as in FIG. 2 represent the same parts.

A circulation line 1 equipped with a drain valve 11 and a pump 12 in the middle between the bottom and top surfaces of the reactor body 1
3 is connected, and a recovery line 14 is connected downstream of the pump 12 of the circulation line 13, and switching valves 15 and 16 are provided in the middle of the recovery line 14 and downstream of the recovery line 14 connection part of the circulation line 13, respectively.
A timer 17 is connected to 5 and 16 for switching between the two at regular intervals.

First, the unreacted material in liquid or slurry form supplied from the inlet 5 into the reactor body 1 is stirred by the stirrer 8, and the drain valve 11 and the switching valve 1 are opened.
By opening the valve 6 and closing the switching valve 15 and operating the pump 12, the unreacted substances are circulated through the circulation line 13, and a flow of the unreacted substances is caused within the reactor main body 1.

Next, when a laser beam is irradiated from the entrance window 3 toward the output window 4, the laser beam hits most of the unreacted substances that are flowing, and the unreacted substances that are hit by the laser beam are exposed to the high energy of the laser beam. It is excited by the reaction and undergoes a chemical change at room temperature and pressure to become a reaction product.

When a certain period of time has elapsed, the timer 17 operates to close the switching valve 16 and open the switching valve 15, so that the liquid containing unreacted substances and reaction products (hereinafter referred to as reaction products) flowing through the circulation line 13 is removed. )
is sampled from collection line 14.

Thereafter, the above process is repeated by the action of the timer 17, and the chemical change of the unreacted substance by the laser beam is advanced.

On the other hand, if the ratio of the reaction products exceeds a certain value as a result of examining the sampled reaction products, the switching valve 16 is closed, the switching valve 15 is opened, and the reaction products, etc. are recovered from the recovery line 14.

When recovering reaction products, etc., the entire amount of liquid in the reactor body 1 is recovered at once, and then unreacted substances are supplied to the reactor body 1 again to cause a chemical reaction by laser light from the beginning. Also (total amount recovery), the proportion of reaction products in the liquid inside the reactor main body 1 is kept constant, and a constant amount of reaction products, etc. is continuously collected, and the same amount of reaction products, etc., is recovered. It is also possible to supply unreacted substances (quantitative continuous collection).

In this way, the recovery line 14 and the circulation line 13
Since they are combined into one system, unreacted substances will not remain in the drain valve 11, and all unreacted substances can be irradiated with laser light, increasing the rate at which unreacted substances undergo chemical changes. (i.e., the efficiency of the laser photoreactor can be increased).

Furthermore, since the recovery line 14 is indirectly connected to the reactor main body 1 via the circulation line 13, the influence of sampling on the internal environment of the reactor main body 1 can be reduced.

Note that the laser light reactor of the present invention is not limited to the above-mentioned embodiments, and instead of providing an exit window, a mirror may be provided inside the reactor body to reflect the laser light. Of course, various other changes may be made without departing from the gist of the present invention.

[Effects of the invention] As explained above, according to the laser light reactor of the invention, since the recovery line is provided in the middle of the circulation line, there is no accumulation of unreacted substances in the recovery line, and the reaction rate can be increased. It is possible to achieve various excellent effects such as being able to increase the noise level and reducing the influence on the internal environment during sampling.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a conventional example. In the figure, 1 is the reactor body, 3 is the entrance window, 4 is the exit window, 5 is the inlet, 8 is the stirrer, 11 is the drain valve, 12 is the pump, 13 is the circulation line, 14 is the recovery line, 15, 16 are The switching valve 17 indicates a timer.

Claims (1)

[Scope of utility model registration request] A laser photoreactor characterized in that a laser light entrance window is provided in a reactor body containing a liquid or slurry-like unreacted substance, an agitator is provided inside the reactor body, a circulation line equipped with a drain valve, a pump and a first switching valve is connected between the lower and upper parts of the reactor body, and a recovery line equipped with a second switching valve is connected between the pump of the circulation line and the first switching valve.