JPS62188999A - Method of processing waste - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a waste treatment method suitable for use in treating waste, particularly radioactive waste.

(b), Conventional Technology Conventionally, waste, especially radioactive waste, has been processed by mixing the waste with cement, water, etc., injecting it into a container such as a drum pipe, solidifying it, and storing it in a designated storage location. Was.

(C) 0 Problems to be Solved by the Invention However, with these methods, when waste and cement are kneaded together with water and then put into a storage container, radioactive cement paste is mixed around the container. is attached and it is 2
There is a high risk of it becoming waste and leaking outside.

In order to eliminate the above-mentioned drawbacks, the present invention aims to solve the above-mentioned drawbacks.
The object of the present invention is to provide a method for treating waste that has a low risk of producing secondary waste when it is put into a storage container.

(d) Means for solving the problem, that is, the present invention dries the water content of the waste to be treated,
In this state, the waste, a water-added coagulation member such as cement that has the property of starting coagulation with water, and solid microparticulate water are mixed together in an even state,
Further, the mixed waste, the water coagulation member, and the solid micronized water are put into a storage container in a dry state, and then the solid micronized water is released from the microparticle state, and the solid micronized water is water-coagulated. The waste in the storage container is solidified by the member and the water released from the solid particulate state.

(e) 0 effect With the above-described configuration, the present invention allows waste to be kept in a dry particle state when dry-mixing the waste with the hydration coagulation member or when putting the dry-mixed waste into a storage container. II! It acts to prevent waste from adhering to secondary waste.

(f), Example Examples of the present invention will be specifically described below.

When treating waste such as radioactive waste, the waste to be treated is first dried to sufficiently evaporate water. The thus dried waste is mixed with aggregates such as cement and sand to form a sufficiently uniform mixture. The purpose of this dry kneading is to mix cement, aggregate, and waste evenly, and during this dry kneading, water encapsulated in microcapsules is simultaneously introduced into the cement and mixed.

Water encapsulated in microcapsules is unlikely to be destroyed by normal dry kneading operations, so dry kneading is properly performed in a dry state. In addition, it is desirable that the particle size of the microcapsules is comparable to that of cement in order to obtain uniform air-mixed cement. After the waste, cement, aggregate, and microcapsule water have been mixed together, the mixed waste is placed in a dry state into a storage container such as a drum pipe. Furthermore, at this point,
Transport waste, etc. in a dry state to a designated storage location,
It is also possible to put the dry kneaded waste into a storage container at the storage location. Furthermore, since the dry mixing operation is carried out in a dry state, cement and waste are treated in a granular state, so waste and cement remain on the mixer etc. that performs the dry mixing, which was not the case in the past. The amount can be kept much smaller than when kneading cement in a water-added state.

Next, the waste placed in the container is irradiated with electromagnetic waves or the like to heat the microcapsules. The heated microcapsules are then destroyed and water flows out into the surroundings. Then, the surrounding cement and the water flowing out of the capsule cause a hydration reaction, and the waste inside the container solidifies together with the cement. Since the microcapsules, cement, and waste are thoroughly air-filled and in a uniform state when they are sealed, the hardening of the cement is uniform throughout as the microcapsules are destroyed. It will be done.

Furthermore, in the above embodiment, water is encapsulated in microcapsules and introduced into cement during dry kneading, but water may be mixed into cement in the form of fine particles. In addition to encapsulating the water in microcapsules, it is of course also possible to produce water in the form of frozen fine particles and dry mix it with cement in an atmosphere below freezing. In this case, until the dry mixed cement and waste are put into the storage container,
It must be transported and stored in an atmosphere below freezing.

Also, the amount of water injected into cement in the form of fine particles is
Since fine water particles are mixed with the cement in a sufficiently uniform state, the amount of hydration required is about the theoretical amount needed to solidify the cement.

Note that the present invention is not limited to waste treatment, but can also be applied to ordinary concrete and mortar pouring.

Hereinafter, a case will be described in which the present invention is applied to ordinary concrete and mortar pouring.

When producing concrete and mortar, first, aggregate such as sand is added to cement in a dry state, and then dry mixing is performed. The purpose of this dry mixing is to mix cement and aggregate evenly, and during this dry mixing, water encapsulated in microcapsules is simultaneously introduced into the cement and mixed. Water encapsulated in microcapsules will not be destroyed by normal dry kneading operations, so dry kneading is properly performed in a dry state. In addition, it is desirable that the particle size of the microcapsules is comparable to that of cement in order to obtain uniform air-mixed cement.

After the cement, aggregate, and microcapsule water have been mixed in this way, the dry-mixed cement is transported to the casting site using an appropriate transportation means. The cement dry mixing site and the cement pouring site do not necessarily have to be close to each other; if they are far apart, a dump truck or the like is used to transport them. As mentioned above, dry-mixed cement is dry, so it is sufficient to transport it using a normal transport vehicle without using a special vehicle such as a concrete mixer truck. Moreover, the dry-mixed cement does not need to be used immediately, and can be stored in a dry state in an appropriate place such as a storage warehouse until it is actually needed.

When the dry-mixed cement is transported to the pouring site, it is poured into the formwork in which it is to be poured. Next, the cement placed in the mold is irradiated with electromagnetic waves or the like to heat the microcapsules. Then, the heated macrocapsule is destroyed and water flows out from inside to the surrounding area. This causes a hydration reaction between the surrounding cement and the water that has flowed out, and the concrete solidifies in a predetermined amount of time. Since the microcapsules are uniformly distributed in the cement by dry kneading, the cement hardens in a uniform state by destroying the microcapsules.

(g) 9 Effects of the Invention As explained above, according to the present invention, the water content of the waste to be treated is dried, and in that state, the waste and cement, etc. have the property of starting coagulation with water. The hydrated coagulation member and the solid microparticulate water are mixed together in an even state by dry kneading, and the mixed waste, the hydrated coagulate member, and the solid microparticulate water are then dried. Then, the fine particulate state of the solid atomized water is released, and the water in the storage volume is poured into a storage container such as a drum pipe, and then the solid particulate water is released from the particulate state, and the water is released from the solid particulate state by the hydration coagulation member and the water released from the solid particulate state. Since it was configured to solidify waste,
The wastes etc. at the time of dry kneading and the wastes etc. at the time of being put into the storage 8 folds are kept in a dry particle state,
Therefore, cement paste and the like will not adhere to the periphery of the tube and leak outside, making it possible to prevent the generation of secondary waste.

Applicant: Mitsui Construction Co., Ltd. Agent Patent attorney Phase 1) Shinji (1 other person)

Claims (1)

[Claims] Dry the moisture in the waste to be treated, and in that state, dry knead the waste, a water coagulation member having the property of starting coagulation with water, and water that has been turned into solid microparticles. Then, the mixed waste, the hydrated coagulation material, and the solid micronized water are put into a storage container in a dry state, and then the solid micronized water is poured into a storage container. A waste treatment method comprising: releasing water from a particulate state, and solidifying the waste in a storage container using the hydration coagulation member and the water released from a solid particulate state.