JP4404572B2 - Separation and collection method of unused recovered powder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for separating and recovering an unused recovered powder fire extinguisher that is suitable for using an unused recovered powder extinguisher extracted from a fire extinguisher as a reuse material.
[0002]
[Prior art]
Most commercially available powder fire extinguishing agents are mainly composed of ammonium phosphate and ammonium sulfate, and other commercially available powder fire extinguishing agents are based on metal bicarbonates (specifically sodium bicarbonate). The former is commonly called ABC powder and the latter is commonly called BC powder. In addition, for fire extinguishers that use ABC powder (ABC powder fire extinguishers) and fire extinguishers that use BC powder (BC powder fire extinguishers), regular inspections, refilling of powder fire extinguishing agents, aging The fire extinguisher is collected, and at that time, unused recovered powder fire extinguishing chemicals are taken out from the respective fire extinguishers. Therefore, it is considered that the unused recovered powder extinguisher generated in this way is once recovered and the recovered unused powder extinguisher is used as a reuse material.
[0003]
As a recovery form of the powder extinguisher such as ABC powder or BC powder, when a fire extinguisher filled with the fire extinguishing agent is brought into a processing facility, the powder extinguishing agent filled in the fire extinguisher is collected by a user or a collector. Alternatively, there may be a case where a sales representative or the like moves to a receiving container such as a dough can at the site and carries the receiving container into a processing facility for collection (Japanese Patent Application No. 2002-074858).
[0004]
[Problems to be solved by the invention]
However, the unused powder extinguishing agent filled in the fire extinguisher is collected by the user, collection company or sales representative, etc. at the site, moving it to a receiving container such as a dough can, and bringing the receiving container into a processing facility for recovery. In the embodiment, there may be a case where foreign materials such as fire extinguisher parts, factory waste materials, and dust are put into a receiving container such as a single funnel and are carried into a processing facility in a state of being mixed in an unused powder fire extinguishing agent. Thus, when the foreign matter is mixed in an unused powder fire-extinguishing agent in a receiving container such as a one-dot can, it is very complicated to visually confirm and remove the foreign matter. In addition, there is a problem that it is difficult to reliably remove foreign matters.
[0005]
The present invention has been made in view of such circumstances, and foreign substances mixed in an unused recovered powder fire extinguisher transferred to a receiving container such as a 1-to-can can be easily removed from the unused recovered powder fire extinguisher. Another object of the present invention is to provide a method for separating and recovering an unused powder fire extinguishing agent that can be reliably separated and used as a raw material for reuse.
[0006]
[Means for Solving the Problems]
In order to achieve the object, the invention according to claim 1 transfers the unused recovered powder fire extinguishing agent extracted from the fire extinguisher to a receiving container, and the unused recovered powder extinguishing agent is passed through a first-stage sieve (hereinafter referred to as a first-stage sieve). , and facilities the sieve separation process was put into sieve separation apparatus having a plurality of stages of sieve mesh number increases sieved in the final stage from) that sieve were sieve separation process by passing through a sieve of the last stage It is characterized in that magnetic metal is adsorbed and removed from unused recovered powder fire extinguishing agent by a magnetic adsorption device .
[0007]
Further, as in the invention described in claim 2, it is preferable that the opening of the first stage sieve is set to 1 to 5 cm, and the number of meshes of the final stage sieve is set to 83 mesh.
[0008]
[0009]
According to the first aspect of the present invention, the foreign matter mixed in the unused recovered powder fire extinguisher transferred to a receiving container such as a 1-can can is reliably captured by the sieve separator and used recovered powder. Can be separated and removed from fire extinguishing agents. Furthermore, it is possible to reliably prevent inconvenience that the magnetic metal powder, which is a foreign substance, is collected with the unused powder fire extinguishing agent.
[0010]
According to the second aspect of the present invention, large foreign matters such as fire extinguisher parts and factory waste can be captured and separated from unused recovered powder fire extinguishing chemicals by the first stage sieve. In addition, fine particles such as dust having a particle size exceeding 83 mesh can be captured and separated from unused recovered powder fire extinguishing agent by the final stage sieve, and the particle size can be the reference particle size (83 mesh). Only unused powder fire extinguishing agents that can be used as reusable raw materials can be recovered below.
[0011]
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a flowchart applied to an embodiment of the present invention. In this figure, one fire extinguisher is filled with an average of about 3 Kg of unused recovered powder fire extinguishing agent, and about 15 Kg of unused recovered powder extinguishing agent extracted from five fire extinguishers is used by the user and the recovery contractor. Or it has been moved locally to a receiving container such as a 1 can by a sales representative. A plurality of receiving containers, such as a 1-can, to which about 15 kg of unused recovered powder fire extinguishing agent extracted from the five fire extinguishers has been transferred are carried into the processing facility 1.
[0013]
The processing facility 1 is provided with a sieve separator 2. The sieve separator 2 is provided with three-stage sieves 2A, 2B, and 2C in which the number of meshes increases from the first-stage sieve 2A to the final-stage sieve 2C. The first-stage sieve 2A has a mesh opening. It is set to 1 to 5 cm, and the number of meshes of the final stage 2C is set to 83 mesh. The number of meshes of the second stage sieve 2B may be about 50 mesh. The first to third stage sieves 2A to 2C are driven by a well-known sieve motor such as an electromagnetic type or an electric type (not shown).
[0014]
The unused recovered powder extinguishing agent transferred to a receiving container such as a plurality of one-cans carried into the processing facility 1 is transferred to the first stage sieve 2A in the sieve separator 2 driven by the sieve motor. It is thrown sequentially. The unused recovered powder fire extinguishing agent charged into the first stage sieve 2A is mixed with foreign parts such as fire extinguisher parts, factory waste containing magnetic metal, and dust. Large foreign matters such as fire extinguisher parts and factory waste materials containing magnetic metals can be captured by the first stage sieve 2A and separated from unused recovered powder fire extinguishing agents.
[0015]
The unused recovered powder extinguishing agent that has passed through the first-stage sieve 2A is sent to the second-stage sieve 2B. The unused recovered powder extinguishing agent sent to the second stage sieve 2B is smaller than the large foreign matter captured and separated and removed by the first stage sieve 2A. Medium-sized foreign matter such as factory waste and garbage containing magnetic metal that is sufficiently larger than that. These medium-sized foreign substances can be captured by the second stage sieve 2B and separated and removed from the unused recovered powder fire extinguishing agent.
[0016]
The first stage sieve 2A separates and removes foreign matter such as large fire extinguisher parts and factory waste containing magnetic metal, thereby greatly reducing the gravity applied to the second stage sieve 2B. Therefore, even if the second stage sieve 2B has a structure with a thin wire diameter having a mesh number of about 50 mesh, an appropriate sieve is executed by avoiding the spread of the line by the medium-sized foreign matter or the mesh damage. be able to.
[0017]
The unused recovered powder extinguishing agent that has passed through the second stage sieve 2B is sent to the third stage sieve 2C. The unused recovered powder extinguishing agent sent to the third stage sieve 2C is smaller than the medium-sized foreign matter captured and separated and removed by the second stage sieve 2B, and the particles of unused recovered powder extinguishing agent Fine foreign matter such as factory waste and dust containing magnetic metal slightly larger than the diameter is mixed. These fine foreign substances can be captured and removed from the unused recovered powder fire extinguishing agent by the third stage sieve 2C. That is, fine foreign matters such as factory waste and dust containing magnetic metal having a particle diameter exceeding 83 mesh can be captured and separated from unused recovered powder fire extinguishing chemicals.
[0018]
Since the foreign material such as the medium-sized fire extinguisher parts and the factory waste material in the foreign material is separated and removed by the second stage fluid 2B, the gravity applied to the third stage fluid 2C is further reduced, so that the third stage Even if the mesh 2C of the mesh has a mesh size of 83 mesh and an extremely fine wire diameter, it is possible to avoid the spread of the wire and damage to the mesh due to a fine foreign substance, and to execute an appropriate sieve.
[0019]
The unused recovered powder extinguishing agent that has passed through the third stage sieve 2C has a particle size that is not more than the standard particle size (83 mesh) defined by the national certification standard. The unused recovered powder extinguisher that has passed through the third stage sieve 2C is sent to the magnetic adsorption device 3 equipped with a permanent magnet or an electromagnet. Here, the third stage sieve 2C is used together with the unused recovered powder extinguisher. The passed magnetic metal (magnetic metal powder) is removed by adsorption.
[0020]
The unused recovered powder extinguishing agent from which the magnetic metal powder has been adsorbed and removed by passing through the magnetic adsorption device 3 is batched by adding 100 kg to the batch tank 4 and sampled from the batched unused recovered powder extinguishing agent. Extraction of air bubbles to check for bubble generation, pressure test to check pressure rise, gas analysis to check for gas generation, color test with color meter, pH test with pH meter, etc. If foreign matter such as collected powder fire extinguishing agent (BC powder) or soil is found to be mixed, the batch of unused recovered powder extinguishing agent equivalent to 100 kg is discarded, and different unused recovered powder extinguishing agent (BC powder) ) And soil and other foreign matter is not observed, the white carbon coated with silicon is separated and removed by a separating device 5 such as a classification rotor, and phosphoric acid An unused recovered powder fire extinguisher mainly composed of nickel and ammonium sulfate is put into the batch tank 6, a sample is extracted from the unused recovered powder fire extinguisher, and ammonium phosphate and ammonium sulfate are extracted by an X-ray diffraction analyzer. Measure the ratio and store 500 kg of unused recovered powder fire extinguishing agent measured by the balance weighing device 7 in one container pack, and use the unused recovered powder extinguishing agent stored in the container pack as a reusable raw material. Can do. The ratio of ammonium phosphate and ammonium sulfate measured by the X-ray diffraction analyzer is a guideline for the replenishment amount of new ammonium phosphate and ammonium sulfate to be replenished when unused recovered powder fire extinguishing agent is used as a reuse material. Become.
[0021]
In the above-described embodiment, the sieve is separated by the sieve separator 2 having the three-stage sieves 2A, 2B, and 2C in which one sieve 2B is arranged between the first-stage sieve 2A and the final-stage sieve 2C. Although the above-described method is used, the method is such that a sieve is applied by a sieve separator 2 having four or more stages of sieves in which a plurality of sieves are arranged between the first stage sieve 2A and the final stage sieve 2C. May be.
[0022]
【The invention's effect】
As described above, since the method for separating and recovering unused recovered powder fire extinguishing agents according to the present invention is configured, the following special effects are achieved.
[0023]
According to the first aspect of the present invention, the unused powder fire extinguishing agent is easily separated from the unused powder fire extinguishing agent, which is transferred to the receiving container such as a one-dot can. Only the drug can be reliably recovered and used as a recycled material . Furthermore, by adsorbing and removing the magnetic metal (magnetic metal powder) that has passed through the final stage sieve together with the unused recovered powder fire extinguisher, it is possible to avoid a decrease in the purity of the unused powder fire extinguisher that can be used as a recycled material. .
[0024]
According to the second aspect of the present invention, it is possible not only to recover unused powder fire extinguishing agent that can be used as a recycle raw material having a particle size equal to or less than a reference particle size (83 mesh), but also to recover unused recovered powder fire extinguishing. Gravity applied to the fluid in the subsequent stage is reduced by separating and removing from large foreign substances mixed with chemicals to fine foreign substances, thereby avoiding the spread of lines and damage to meshes due to foreign substances. Thus, it is possible to contribute to the execution of an appropriate fluid.
[0025]
[Brief description of the drawings]
FIG. 1 is a flowchart applied to an embodiment of the present invention.
[Explanation of symbols]
2 Fluid separator 2A First stage fluid 2C Third stage fluid (final stage fluid)
3 Magnetic adsorption device

Claims (2)

Move the unused recovered powder fire extinguisher extracted from the fire extinguisher to a receiving container, and then add this unused recovered powder fire extinguisher from the first stage sieve (hereinafter referred to as “fluid”) to the final stage sieve. and facilities the sieve separation process was put into sieve separator with a sieve, adsorption to magnetic metal by the magnetic adsorption device from the unused recovered powder fire extinguishing agent, which is the sieve separation process by passing through a sieve of the last stage A method for separating and recovering unused recovered powder fire extinguishing agent, characterized in that it is removed .   The method for separating and collecting unused recovered powder fire extinguishing agent according to claim 1, wherein the opening of the first stage sieve is set to 1 to 5 cm, and the number of meshes of the final stage sieve is set to 83 mesh.

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