Special-purpose electrical heating and drying equipment for iodide-removing filtering system of nuclear facilities

Abstract

The invention provides an electric heating dewetting device specially used for an iodined filter system of a nuclear facility. The device comprises a dewetter body, an electric heater and an automatic control device. An electric heating element of the electric heater is arranged in a sleeve of a box body of the dewetter body and operates in a sealing mode, and the electric heating element is completely isolated from radioactive gas, thereby waste gas is prevented from polluting electric heating tubes to generate solid radioactive waste and the iodined system is prevented from causing fire accidents. The electric heating dewetting device adopts temperature automatic control and overheating automatic protection and can realize functions of polling, temperature measurement, displaying, overheating alarm, overheating protection, and the like. The invention can meet the requirement of the iodined filter system on the air temperature, effectively reduce the relative humidity of air in the iodined system and the humidity of an iodined filter and improve the iodined efficiency of the iodined filter system with the iodined efficiency up to 98.61 percent.

Description

technical field [0001] The invention belongs to nuclear facility iodine removal filter system equipment, in particular to a dehumidification device of the nuclear facility iodine removal filter system. Background technique [0002] When the nuclear reactor fuel element is burned or the nuclear reactor cladding is damaged, a large amount of iodine will be released. Iodine is a volatile fission element, of which 131 I. 129 I easily pollute the environment and endanger human health. 131 I is a highly toxic nuclide with a half-life of 8.04 days. 129 I has a half-life of up to 1.57×10 7 Over the years, it is easy to accumulate in the thyroid gland, which is very harmful to people, and its accumulation must be fully considered. Therefore, it is important to remove iodine from radioactive waste gases generated by nuclear facilities. [0003] The traditional nuclear facility iodine removal filtration system generally consists of a pre-filter, a high-efficiency filter, an iodine...

AI Technical Summary

Problems solved by technology

[0004] 1. Radioactive waste will be formed after being damaged in a radioactive environment;

[0005] 2. There is no reliable isolation from radioactive gas, and it is difficult to repair after damage;

[0006] 3. Use a contactor as a high-power temperature-regulating element, and the contactor is easily damaged;

[0007] 4. The reliability of automatic temperature control and over-temperature automatic protection is not high;

[0008] 5. It is difficult to replace the accessories after the electric heating dehumidifier is damaged;

[0009] 6. The service life is short and not durable

[0010] Through the investigation of dehumidifier products, no dehumidifier products specially used for iodine removal and filtration systems of nuclear facilities have been found

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