Installations for the disposal of lewisite with obtaining metal arsenic

 

(57) Abstract:

Usage: a device for the destruction and disposal of lewisite. The inventive installations for the disposal of lewisite is a reactor of the continuous displacement made in the form of a pipe. At the exit of the reactor is the deposition chamber equipped with a cooling device, a device for cleaning the walls of the chamber deposition from metallic arsenic and device for unloading. 2 Il.

The alleged invention relates to a device for the destruction of chemical warfare agents (BOV) can be used for the destruction of lewisite and other BOV.

Challenges facing the claimed invention, are:

the creation of a continuous, mobile, compact installation;

the increase in capacity utilization of lewisite per unit reaction volume of the reactor;

considerable simplification of site selection the main component of the reaction disposal of lewisite;

the increase in the degree of conversion of lewisite to the concentration at the outlet of the reactor is not above the maximum permissible concentration of lewisite in the air of working zone of production areas;

the reduction in operating costs.

the embossing, made in the form of a pipe, and the deposition chamber, located at the exit of the reactor displacement, provided with a device for cooling the gas-vapor mixture, a device for cleaning the walls of the chamber deposition from metallic arsenic and device for unloading.

In Fig. 1 presents the General scheme of the installation.

The installation consists of the following main units and vehicles:

the feed block of lewisite 1;

the power supply restoration component 2;

a unit for production of gas-vapor mixture of lewisite and recovery component 3;

continuous reactor displacement 4;

the deposition chamber 5;

refrigerator gas mixture 6;

the adsorber 7;

desorber 8;

the adsorber 9;

membrane gazorazdelitel 10;

the cartridge filter 11.

The device operates as follows:

Lewisite from the supply unit 1, a specified quantity, at a given temperature, one of the known ways, served in a unit for production of gas-vapor mixture 3. Block 3 is made in the form of one of the known devices, such as nozzles, sector, evaporator apparatus "boiling" layer. There in the block 3 from the power supply restoration component 2 in a given quantity at a given temperature">

Gas-vapor mixture of lewisite and, for example hydrogen, is heated in unit 3 one of the known methods, such as plasma jet or induction heated, and fed to the reactor inlet displacement 4 made in the form of a pipe. The temperature of the gas mixture along the length of the reactor 4 is maintained at a specified level is one of the known methods. In the tubular reactor is the hydrogenolysis of lewisite in a reducing environment, for example, in the environment of hydrogen. The main components of the reaction are formed of metallic arsenic in the form As4and hydrogen chloride. As a side reaction products are formed hydrocarbons WITH2and carbon.

Gas-vapor mixture at a given temperature from the reactor 4 is fed into the deposition chamber 5, where the deposited metal arsenic. Gas-vapor mixture from the deposition chamber 5 flows into the refrigerator 6, is cooled therein to a predetermined temperature and is fed to the inlet of the adsorber 7. In the adsorber is adsorption of arsenic trichloride (choral music theatre) from the vapor-gas mixture on one of the known adsorbents. A gas mixture containing hydrocarbons WITH2, hydrogen chloride, neprevyshenie hydrogen, is fed to the adsorber 9, where the absorption of chloride mixture from the absorber 9 is fed to the input of the membrane gazorazdelitel 10, where the separation neprevyshenie hydrogen from hydrocarbons WITH2. The hydrogen serves to block the receipt of gas-vapor mixture 3, and hydrocarbons WITH2containing a small amount of hydrogen, passing the cartridge filter 11 and go on further use, for example to install steam reforming of hydrocarbons. Desorption of the choral music theatre performed on desorber 8, a flow of hydrogen at a given flow rate and a given temperature at the entrance of desorber 8.

Gas-vapor mixture containing choral music theatre and hydrogen is fed to the input unit receiving the gas mixture 3.

In Fig. 2 presents a General view of the deposition chamber 5. The deposition chamber 5 includes the following basic devices:

device for cooling the gas-vapor mixture 12;

a device for cleaning the walls of the chamber 13;

device for periodic discharge of the principal component decomposition of lewisite from the deposition chamber 14.

Gas-vapor mixture from the reactor 4 is fed into the deposition chamber 5. As the gas mixture along the length of the deposition chamber, the mixture is cooled using one of the known devices 12, and starting from a certain temperature of the gas mixture on the inside of the cold surface of the camera nasienia on the walls of the deposition chamber is removed from the chamber walls one of the known devices 13, and periodically unloaded from the chamber of the deposition of one of the known devices 14.

The proposed installation for the disposal of lewisite compact, mobile and can be easily made mobile versions.

Process for the proposed installation is carried out in a continuous mode that allows you to easily automate the process of managing the entire process installation.

The proposed installation can easily be used for disposal of other BOV.

In this installation is wasteless technology of all main and side products of the hydrogenolysis of lewisite in a reducing environment.

The proposed setup allows to increase the degree of conversion of lewisite at the exit of the reactor displacement up to concentrations not higher than the MPL.

Alleged by the invention results from the laboratory and bench installation by hydrogenolysis of lewisite in a reducing environment.

To test the main unit, its stability. In the hydrogenolysis of lewisite on the plants received a batch of metallic arsenic, which after appropriate purification from impurities is directed to the manufacture of semiconductor C storage lewisite to build a pilot plant in several tens of tons per year for lewisite.

Installations for the disposal of lewisite with obtaining metal arsenic containing continuous reactor displacement made in the form of a pipe, and the deposition chamber, located at the exit of the reactor displacement, provided with a device for cooling the gas-vapor mixture, a device for cleaning the walls of the chamber deposition from metallic arsenic and device for unloading.

 

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