CZ33334U1 - Mobile box for on-site thermal decontamination of solid materials - Google Patents

Description

The technical solution relates to the field of decontamination of soils, construction waste and sludges contaminated by petroleum substances and persistent organic pollutants by means of thermal desorption carried out in the on-site mode directly at the site of contamination by means of mobile equipment.

BACKGROUND OF THE INVENTION

The process of thermal desorption is one of the traditional methods of material remediation, its application can be characterized by high efficiency and universality of use, but high technical and economic demands. Its basic principle is to heat the contaminated material to a temperature at which efficient transfer of contaminants firmly bound in the matrix into the gas phase removable from the matrix by suction, also called ventilation, occurs. Any conventional method can be used to heat the material. Most often it is classical indirect conduction heating by heat transfer from the source through the heat exchange surface, where the energy source can be burners burning liquid or gaseous fuel, resp. any electrical heating elements. However, heat conduction through the matrix is slow in the case of thermally low conductive materials such as soil and debris, and the process is therefore energy intensive. On the other hand, it is a very accessible technique and its simple application. Often a direct convective heating method is applied, which occurs by contacting the material with the heat transfer medium (superheated steam, hot flue gas or air). However, the hot medium may flow through the preferential paths when applied in a static layer, so heating may not be homogeneous. In addition, the application of steam depends mainly on its availability in the locality, its targeted preparation can be very expensive, and in the case of direct contact of the flue gases from the burners with the matrix, very high requirements are set for flue gas cleaning. dropping. The most advanced is the application of the electromagnetic method of heating, where the material interacts with the applied microwave, radio frequency, or. infrared radiation. Microwave or radiofrequency heating is carried out by volume, which increases the efficiency and speed of heating and brings many other advantages, but the technical design is quite demanding in terms of safety, control and measurement, as well as in terms of purchase costs. The application of different techniques therefore has its limits and their combination can bring considerable savings in the future.

Depending on the place of application of the remediation technology, the procedures can generally be divided into in-situ, where remediation is carried out directly at the original pollution site, and ex-situ, for which the material must first be extracted from the original location. On-site technology is referred to as a procedure where the cleaning of the extracted material takes place directly in the given locality of the ecological load, as opposed to the off-site approach where the material is additionally transported, which makes the remediation considerably more expensive. The thermal desorption process can be applied in all these variants, most often it is implemented in practice as an ex-situ technology.

When in-situ thermal energy is applied, it is quite technically difficult to achieve an effective temperature in the entire polluted volume of soil, most often it is a delimited part of the unsaturated zone on the site with a focus of contamination, and at the same time. With the more frequent application of ex-situ thermal desorption technology in the form of dosing the extracted material, more or less treated, for example, by crushing or homogenizing, into a rotary kiln, achieving a sufficiently high temperature uniformly throughout the material volume is much more efficient. The entire ex-situ thermodesorption technology can be very well regulated while maintaining strict safety conditions and ensuring efficient management of contaminant vapors in the subsequent technological step of purifying the emission stream. However, the technical and economic requirements for the operation of this technology are considerable, in particular associated with the installation and optimization of operations, a complex system of loading

- 1 CZ 33334 U1 with emissions or legislative requirements. For this reason, the application of this technology in practice in remediation is limited to the most risky contamination, for example polychlorinated substances with high concentrations, for which no other effective tool is available. However, remediation of the vast majority of these environmental burdens is currently postponed for economic reasons.

In the case of remediation of less risky and more common contamination, eg oil products, but also in some of the more risky cases, this procedure is replaced by a cheaper process of landfilling material in hazardous waste landfills, which does not necessarily mean overall financial savings and its placement in hazardous waste landfills, but it is a much simpler way to deal with the burden in terms of organization and technology, but the environmental problem is only relocated, not eliminated.

The principle of using microwave heating for the purpose of thermal desorption of soil contaminants is part of US 5532462, while utility model CZ 26360 U1 describes a mobile device utilizing ex-situ microwave heating to contaminated materials in the form of a microwave thermodesorber.

At present, ex-situ thermal desorption technology is still available on the market, the principle of which is to heat the accumulated material using a system of immersed heaters and exhaust ducts. However, the accumulated material is covered only by foil during the process and for this reason it was probably not widespread use of the technology during remediation, when sufficient environmental safety of the operation cannot be achieved without the risk of leakage of contamination into the atmosphere.

Remediation of many ecological burdens not only in the Czech Republic is often slow, ineffective and often expensive. The target pollution from the point of view of technology application is contamination by organic substances, which can include chlorinated, aromatic, aliphatic, polycyclic and other hydrocarbons. Contaminated contaminations include, in particular, low volatile organic compounds, often classified as persistent pollutants, resp. heavy contamination by volatile substances for which some processes may be effective, but at a high concentration in the material these methods cease to be economically rational.

The aim of the technical solution is to design a device which would represent a mobile airtight box, which would perform thermal desorption of the transported material at the contamination site and would adsorb the resulting desorption products by active filter components and discharge only clean water and clean air into the atmosphere without risk other secondary environmental contamination. The resulting box must be of a mobile, ideally modular design and must allow for the variability of the heating and filtration system. The proposed technical solution should represent a compromise in the application of the thermodesorption process between a poorly controllable in-situ process and a very efficient but very expensive ex-situ process in the form of a rotary kiln application. The application of this facility aims primarily at the economic rationalization of the implementation of remediation measures in the case of old environmental burdens as well as the simultaneous accidental release of organic substances into the environment.

The essence of the technical solution

The deficiencies of the known technical solutions are solved by the proposed mobile box for on-site thermal decontamination of solid materials. It is a technical solution of the on-site technology of ex-situ thermal desorption used for the cleaning of contaminated materials in sites with environmental burden. This is a discontinuous process of thermodesorption process, when the prepared contaminated material is dosed into the assembled box, then a cleaning process based on heating the material and exhausting contamination in steam form is applied and finally after cooling the material the equipment is disassembled and the material is ready for recycling or return use on site. The technology can be easily transported to a specific site with target pollution, then

-2GB 33334 U1 can be easily installed using conventional techniques and after the material has been cleaned, be reinstalled and moved to another location. The box is modular and can be adapted to the conditions at any location. Its application has practically no requirements for material quality and its pretreatment in terms of mechanical and physical properties. The box will be most often used for cleaning the excavated soil, eventually. construction debris from demolition.

The mobile box for on-site thermal decontamination of solid materials consists of at least fifteen pieces of modular ceiling and wall panels. The ceiling panel is only perforated. The wall panels have the same size and outer shape, but their functional structure is different and creates four basic designs. These panels are detachably connected to a bottomless block assembly of variable length and fixed width and height. The mobile box further comprises a heating system for heating the interior of the box, which comprises an external heat source and an internal heat distribution disposed within the box. The box also includes a venting system ensuring the extraction of contaminated vapors and air from the box and temperature sensors for sensing the internal temperature of the material processed in the box.

In a preferred embodiment, the ceiling panel of the mobile box is 3,000 x 1,000 mm and the wall panels are 2,000 mm x 1,000 mm. All panels are basically formed by a circumferential welded frame with internal reinforcements coated on both sides with steel sheet and an internal thermal insulation filler arranged between the sheets.

In another preferred embodiment, at least one side edge of the inner side of the wall panels of the box is provided with an overlap that forms an overlap of the panel joint within the box of two adjacent adjacent wall panels. This overlap serves to strengthen the box structure and improve the airtight properties of the resulting box assembly.

In another preferred embodiment, the two types of wall panels are provided with at least one transverse through hole of different size to install the heat distribution from outside the box into the interior of the box and may be provided with at least one additional opening to lead the vent node out of the box. Another variant of the wall panel is provided with at least one transverse through opening for the installation of temperature sensors from outside the box into the interior of the box, the opening being of a different size than the holes of the previous panels.

In another preferred embodiment, the box ventilation system is formed by at least one pair of vertical venting tubes, at least one horizontal venting tube, an air hose manifold, a collection node, and an outlet of the box ventilation system. The vertical venting tubes are attached by means of removable clips to the inside of the wall panel forming the side wall of the box. Each pair of vertical venting tubes forms a common pair, the vertical venting tubes being arranged one at a time on one of a pair of opposed wall panels. The upper ends of each pair of vertical venting tubes are connected to a horizontal venting tube. The horizontal venting tube comprises at least one additional connection opening through which it is connected via a collecting air tubing to the collecting node of the venting system. The collecting node is further connected to the outlet of the box ventilation system passing through one of the wall panels and extending to the outside of the box.

In a further preferred embodiment, the side edges of the panels are provided with a gasket sealing the emerging panel joints against leakage of contaminated vapors and air from the box. The interconnection of the panels to each other is realized by means of an external dismountable screw connection.

In another preferred embodiment, the heat source is a light fuel oil burner. The heat distribution in this preferred embodiment is hot air and consists of at least one system of interconnected heat pipes arranged inside the box in one horizontal plane. All hot water pipes are connected to a single inlet connection pipe connected to the heat source outlet, where warm air is supplied to the heat distribution system.

-3 CZ 33334 Ul

At the same time, on the other hand, the hot water pipes are connected to a single outlet pipe to remove the cooled air from the heat distribution system. The inlet and outlet pipes pass through respective transverse through holes in the respective wall panels.

In another preferred embodiment, the heat source is a microwave radiation generator. In this embodiment, the heat distribution is a waveguide embedded through the respective through opening of the respective wall panel of the side wall of the box inside the box. The waveguide is housed inside the chamotte tube inside the box and is anchored in the wall of the panel by means of a variable diameter tightening and sealing flange, which prevents the escape of microwave radiation into the box surroundings and fixes the waveguide inside the box.

In yet another preferred embodiment, the mobile box comprises an outer box support system formed of at least one double-arm strut for each wall panel. In this preferred embodiment, the double-arm strut is formed by a longitudinal spacer and a crossbar, one end of which is detachably pivotable to the wall panel. At their other end, the spacers and the crossbars are pivotally pivotally pivoted toward each other, this connection being provided on the same pivot with an anchoring member for anchoring the strut to the ground.

The on-site thermal decontamination device for solid materials consists of a mobile box, an interconnecting external vent pipe, a condensation trap, a demister, an adsorption unit and a vacuum pump. The venting system boxes through the interconnecting piping connected to the condensate separator inlet, where water condensate and contaminants are separated. The outlet of the condensation separator is connected to the inlet of the demister, which serves for additional separation of the mobilized condensate droplets. The output of the demister is connected to the inlet of the adsorption unit, to capture non-condensed contaminants, the outlet of which is connected to the pump inlet. The vacuum pump provides suction vacuum throughout the plant to extract contaminated vapors and air produced during thermal decontamination through the adsorption unit, condensation separator, and the entire venting system. Cleaned air is discharged into the air by the pump.

Clarification of drawings

The technical solution will be explained in more detail by means of drawings which show:

Giant. 1 is a perspective view of a box in a basic embodiment with microwave heating;

Giant. 2 is a side view of a basic box with microwave heating, with individual inlet and outlet openings in the panels;

Giant. 3 is a perspective view of a box in a basic embodiment with hot-air heating;

Giant. 4 side view of the box in basic design with hot-air heating, with individual inlet and outlet openings in the panels

Giant. 5 is a perspective view of an exposed box with hot-air heating and showing the internal arrangement of the temperature sensors and the single-layer thermal distribution with one burner;

Giant. 6 is a perspective view of an exposed box with hot-air heating and showing the internal arrangement of the temperature sensors, two separate single-layer heat pipes and two burners;

Giant. 7 is a front cross-sectional view of the hot-air heating section showing the internal arrangement of the temperature sensors, two separate single-layer heat distribution systems and two burners;

-4GB 33334 U1

Giant. 8 is a front cross-sectional view of the hot-air heater and showing the internal arrangement of the temperature sensors, one dual-layer heat distribution and one burner;

Giant. 9 is a perspective view of an exposed microwave-heated box showing an internal arrangement of temperature sensors, fireclay tubes and waveguides;

Giant. 10 is a perspective view of a box with two-arm struts installed;

Giant. 11 shows an arrangement of a box ventilation system;

Giant. 12 is a perspective view of a wall panel without holes;

Giant. 13 is a cross-sectional view of a panel showing a panel edge overlap;

Giant. 14 is a block arrangement of an on-site thermal decontamination apparatus with a box in the apparatus assembly.

Examples of technical solutions

According to Figs. 1 to 4, the mobile box 1 for on-site thermal decontamination of solid materials consists of a modular assembly of at least some wall panels 3, 4, 5, 6 and ceiling panels 2. The dimensions of box 1 in the basic embodiment are box length 1 is 3 000 mm, box 1 width 3 000 mm and box 1 height 2 000 mm. The box 1 consists of twelve pieces of at least some wall panels 3, 4, 5, 6 and three ceiling panels 2 in the basic assembly. The panels 2, 3, 4, 5, 6 are detachably connected to each other into a bottomless block assembly. The box 1 comprises at least one heating system with at least one external heat source and at least one internal heat distribution 9. The heat source is arranged outside the box 1, while the heat distribution 9 is arranged inside the box 1 and only its inlet and outlet portions extend outside the box. The box 1 further comprises a venting system 10 for extracting contaminated vapors and air from the box 1 and a temperature sensor 18 for sensing the internal temperature of the material processed in the box 1 and controlling the internal heating of the placed soil.

The panels 2, 3, 4, 5, 6 of the box 1 consist of a circumferential welded frame with internal reinforcements coated on both sides with a steel sheet and with an internal thermal insulation filler arranged between the sheets. The dimensions and construction of the box 1 with respect to the dimensions of the panels 2, 3, 4, 5, 6 make it possible to vary the resulting length of the box 1 in the longitudinal plane by at least 1000 mm width. 6 do not allow changing the width of the box 1 or its height. The material and frame construction of the panels 2, 3, 4, 5, 6 are such that the resulting structure of the box 1 is sufficiently load-bearing, strong, while providing minimal heat transfer from the inside of the box 1 to the outside. For this reason, panels 2, 3, 4, 5, 6 are insulated by an inner layer of insulating cotton wool or a similar thermal insulation material.

The wall panels 3 according to this invention form the front and rear walls of the box 1, i.e. the walls in the direction in which the box 1 can be further expanded and from which the soil is weighed into the box 1. The wall panels 3 and ceiling panels 2 are constructed as solid The reason is that they do not lead the heating system, the venting system 10 or the temperature sensors 18 to them. Conversely, the panels 4, 5, 6 are perforated by the functional through holes 15, 16, 17, 42 for the through holes. the installation of the heating system, the outlet 8 of the venting system 10 and the temperature sensors 18. The mutual arrangement of the wall panels 4,5,6 in the side wall assembly of the box 1 depends on the particular required parameters of box use, two basic examples being shown in Figs. for the basic dimension of box 1 and two systems of the heating system used.

According to FIGS. 12 and 13, at least one side edge 11 of the inner side 12 of the wall panel 3, 4, 5, 6 is provided with an overlap 13 forming an overlap of the panel joint 14 of two adjacent adjacent panels.

Wall panels 3, 4, 5, 6 inside the box 1. The overlap 13 helps to seal the panel joint 14 against the escape of contaminated steam and air while increasing the strength of the resulting mobile box construction.

The overlap 13 of the wall panels 3, 4, 5, 6 is formed by a strip of welded steel strip overlying the sealed panel joint 14 from the inside.

According to FIGS. 2 and 4, the wall panels 5, 6 are provided with at least one closable transverse through hole 15, 16 for installing the heat distribution 9 from outside the box 1 into the interior of the box 1 and optionally another transverse through hole 42 for outlet 8 of the venting system 10 outside the box. The wall panel 4 is provided with at least one transverse bore 17 for installing temperature sensors 18 from outside the box 1 into the interior of the box 1. The bore 15 is, according to one embodiment, formed of a continuous steel tubular profile with external clamping and sealing flange 43 hole diameter. The flange 43 thus anchors the through waveguide 33 and prevents it from spontaneously moving, ejecting or rotating, while at the same time opening 15 seals against microwave leakage outside the box T

Referring to FIG. 11, the box 1 venting system 10 is comprised of at least one pair of vertical venting tubes 19, at least one horizontal venting tube 20, a collecting air hose 25, a collecting node 26, and an outlet 8 of the box 1 venting system. In one embodiment, a length of 1800 mm, having a diameter of U and along its entire cylindrical circumference, are perforated with a diameter of 5 mm. The vertical venting tubes 19 are fastened by means of removable clips 21 to the inside 12 of the wall panels 4, 5, 6 forming the side walls of the box L The two opposing vertical venting tubes 19 disposed one on the opposite wall panels 4, 5, 6 The horizontal venting tube 20 is, according to one embodiment, 2600 to 2800 mm long, with a U-diameter and perforated along its entire cylindrical circumference with 5 mm holes. The horizontal venting tube 20 comprises at least one additional connection opening 24 connected through the air hose 25 to the collecting node 26 of the venting system 10. The collecting node 26 is further connected to the outlet 8 of the venting system 10 of the box 1 passing through the aperture 42 through one of the wall panels 5. 6 and opening on the outside of the box l ·

The side edges 11 of the panels 2, 3, 4, 5, 6 are provided with a seal to seal the panel joint 14 against the escape of contaminated steam and air. The joining of the panels 2, 3, 4, 5, 6 to each other is realized by means of at least one outer removable screw connection 27. The seal is, according to one embodiment, formed by strips of an inserted sealing tape which, when joining the panels 2, 3,4, 5, 6 hermetically sealing the panel panel 14 formed. The joining of the panels 2, 3, 4, 5, 6 can be made in addition to the screw connection 27 by means of hinges, connecting lugs with pins or other known method of joining larger structural components.

3 and 5, the heat source is at least one burner 28 for burning light fuel oil. The heat distribution 9 in this technical solution is hot air and consists of at least one system of interconnected heat pipes 29 arranged inside the boxes in at least one horizontal plane. The hot water pipe system 29 is connected to a single hot water inlet connection pipe 30 connected to a heat source outlet for supplying warm air to the heat distribution system 9 and a single hot water outlet connection pipe 31 to remove cooled air from the heat distribution system 9. Tubes 30, 31 pass through transverse through holes 16 in the wall panels 5. In one embodiment of FIG. 5, the hot water pipes 29 are disposed in a horizontal line with a heat inlet on one side by a pipe 30 and an outlet pipe 31 on the opposite inlet side. In another embodiment of FIG. 8, the hot water pipes 29 are arranged in two horizontal rows one above the other with an inlet on one side by a pipe 30 and an outlet on a pipe 31 on the same side. In another technical solution according to FIGS. 6 and 7, there are two burners 28 and two heat distributions 9, which always start and end on the opposite side of the second heat distributing 9 and within the box 1 can intersect one another in a layered manner.

-6GB 33334 U1

1 and 9, the heat source is at least one microwave radiation generator 32. In this example, the heat distribution 9 is a waveguide 33 embedded through a through hole 15 of the wall panel 6 of the side wall of the box 1. In the box L The waveguide 33 is a commercially available metal hollow tube of rectangular cross section 50 mm x 100 mm. length 2500 mm, ideally in a seamless design and inside the box 1 is embedded in a protective fireclay tube 34 and anchored in the wall of the panel 6 by means of a tightening and sealing flange 43. The microwave generator 32 is according to one embodiment 6 kW and microwave wavelength 2.45 GHz. In this embodiment, the waveguides 33 are disposed only in the central horizontal plane of the box 1, at an axial distance of 1500 mm from each other. The chamotte tubes 34 have an inner diameter of 180 mm and are placed in the box 1 when the box 1 is loaded with soil and fixed in a horizontal position so that their inner opening adjoins the opening 15 in the wall panel 6. The waveguide 33 is only placed after the box 1 has been loaded. earth. The waveguide 33 is inserted into the fireclay tube 34 and gradually extends, depending on the soil heating requirement, preferably by 300 to 500 mm every 24 to 48 hours. The temperature inside the box 1 is periodically sensed by the temperature sensors 18. The temperature sensors 18 are arranged in sets of 3 x 3 pieces in three layers one above the other in one vertical cross-sectional plane of the box L

When using a heat source in the form of a microwave radiation generator 32, it provides better spatial thermal heating of the soil compared to the light fuel oil burner 28, regardless of the grain size of the decontaminated material. The optimum spacing of the individual waveguides 33 in one horizontal plane is 1500 mm apart, so that if this heat source is used, only one heat distribution 9 located approximately half the height of the box 1 is selected. However, each waveguide 33 placed in the fireclay tube 34 had its own microwave generator 32. Thus, two waveguides 33 and two microwave generators 32 are optimally required for the box 1 in the basic size design. The optimum working temperature of the entire cleaned soil volume is then achieved by the application of microwaves by means of a microwave radiation generator 32 and the gradual insertion and withdrawal of waveguides 33 from and into the fireclay tube 34.

When using light fuel oil burners 28 with a warm air heat distribution 9, the soaking effect on the soil is lower than that of microwaves and it is necessary that the overheated rock is additionally prepared, in particular its grain size is not more than 50 mm. Better overheating is achieved by the denser mesh of the heat pipes 29, see Figs. 6, 7, 8 connected to a single tubular hot air system in one or more horizontal planes, by interconnecting several burners 28 and several heat distributions 9, or by interconnecting individual heat pipes 29 by cross ribs. that conduct heat, but no longer warm air.

According to FIG. 10, the box 1 comprises an outer support system of the box 1, formed by at least one double-arm strut 35 for each wall panel 3, 4, 5, 6 of the box L The two-arm strut 35 is formed by a longitudinal strut 36 and a crossbar 37; tapped to the wall panel 3, 4, 5, 6 and the other end being pivotally undetachable to each other. This joining of the spacer 36 and the crossbar 37 is provided on the same pivot with anchoring member 38 for anchoring the strut 35 to the ground by means of nails, anchors, chemical anchors or other fasteners depending on the type, hardness and quality of the ground.

The on-site thermal decontamination device 39 of the solids of FIG. 14 consists of a mobile box, an interconnecting external venting line 40, a condensation trap 41, a demister 7, an adsorption unit 23, and a vacuum pump 22. Output 8 of the venting system 10 The outlet of the condensation separator 41 is connected to the inlet of the demister 7, the outlet of which is connected to the inlet of the adsorption unit 23. The outlet of the adsorption unit 23 is connected to the inlet of the pump 22. The pump 22 is located always at the end of the device 39, since it provides vacuum throughout the device 39.

-7 GB 33334 U1

Industrial applicability

The technical solution can be used in the field of environmental chemistry to remedy the chemical load of soils, after the soil has been hit by a dangerous chemical substance, eg after fuel leakage from crashed vehicles into the soil, or in the case of old environmental burden from insufficient management of industrial waste in the past.

PROTECTION REQUIREMENTS

Claims (12)

Mobile box (1) for on-site thermal decontamination of solid materials, characterized in that it comprises at least 15 pieces of modular ceiling and wall panels (2, 3, 4, 5, 6) detachably connected to a bottomless block assembly, at least one a heating system comprising at least one external heat source and at least one internal heat distribution (9) arranged within the box (1), a venting system (10) for extracting contaminated vapor and air from the box (1), and at least one temperature sensor (18) for sensing the internal temperature of the material processed in the box (1). Mobile box according to claim 1, characterized in that the ceiling panel (2) has a dimension of 3000 x 1000 mm and the wall panels (3, 4, 5, 6) have dimensions of 2000 mm x 1000 mm. Mobile box according to claims 1 and 2, characterized in that the panel (2, 3, 4, 5, 6) is formed by a circumferential welded frame with internal reinforcements coated on both sides with steel sheets and an internal thermal insulation filler arranged between the sheets. Mobile box according to claims 1 to 3, characterized in that at least one side edge (11) of the inner side (12) of the wall panels (3, 4, 5, 6) is provided with an overlap (13) forming an overlap of the panel joint (3). 14) within a box (1) of two connected adjacent wall panels (3, 4, 5, 6). Mobile box according to Claims 1 to 4, characterized in that the wall panels (5, 6) are provided with at least one closable transverse through opening (15, 16) for the installation of the heat distribution system (9) from outside the box (1) into the interior space. a box (1), and at least one of the wall panels (5, 6) provided in the box assembly (1) is provided with an outlet (8) of the venting system (10) outside the box (1), and that the wall panel (4) is provided with at least one transverse opening (17) for the installation of temperature sensors (18) from outside the box (1) into the interior of the box (1). Mobile box according to one of Claims 1 to 5, characterized in that the ventilation system (10) is formed by at least one pair of vertical ventilation tubes (19), at least one horizontal ventilation tube (20), a collecting air hose (25), a collecting tube. a node (26) and an outlet (8) of the venting system (10) of the box (1), each of the pair of vertical venting tubes (19) being fixed by at least one removable clip (21) to the inside (12) of the wall panel (4) 5, 6) forming a side wall of the box (1), wherein each pair of vertical venting tubes (19) is arranged one vertical venting tube (19) on one of a pair of opposite wall panels (4, 5, 6), the ends one pair of vertical venting tubes (19) are connected to a horizontal venting tube (20), wherein the horizontal venting tube (20) comprises at least one n another connection opening (24) connected via the air hose manifold (25) to the collection node (26) of the ventilation system (10), the collection node (26) being connected to the outlet (8) of the ventilation system (10) of the box (1) passing through the through hole (42) through one of the panels (5, 6) and extending on the outside of the box (1). -8GB 33334 U1 Mobile box according to claims 1 to 6, characterized in that the side edges (11) of the panels (2, 3, 4, 5, 6) are provided with a seal for sealing the panel joint (14) against the escape of contaminated steam and air; the connection of the panels (2, 3, 4, 5, 6) to each other is realized by means of at least one removable screw connection (27). Mobile box according to claims 1 to 7, characterized in that the heat source is at least one burner (28) for burning light fuel oil, the heat distribution system (9) is hot air and consists of at least one system of interconnected heat pipes (29). arranged inside the box (1), in at least one horizontal plane, which are connected to a single inlet connection pipe (30) connected to a heat source outlet for supplying warm air to the heat distribution system (9) and a single outlet pipe (31) from the thermal distribution (9), the tubes (30, 31) passing through the transverse through holes (16) in the wall panel (5). Mobile box according to claims 1 to 7, characterized in that the heat source is at least one microwave radiation generator (32) and the thermal distribution (9) is a waveguide (33) for the application of microwave radiation inside the box (1) recessed through the through an opening (15) of the wall panel (6) of the side wall of the box (1) inside the box (1), the waveguide (33) inside the box (1) being embedded in the protective fireclay tube (34) and anchored in the wall (6) tightening and sealing flanges (43). Mobile box according to claims 1 to 9, characterized in that it comprises an outer box support system (1) comprising at least one two-arm strut (35) for the wall panels (3, 4, 5, 6) of the box (1), the two-arm strut (35) is formed by a longitudinal spacer (36) and a crossbar (37), one end of which is detachably pivotable to the wall panel (3, 4, 5, 6) and the other end the connection is provided on the same pin with an anchoring member (38) for anchoring the strut (35) to the ground. Device (39) for on-site thermal decontamination of solid materials, characterized in that it consists of a mobile box (1) according to any one of claims 1 to 10, an interconnecting external vent pipe (40), a condensation separator (41) , from the demister (7), from the adsorption unit (23) and from the vacuum pump (22), the outlet (8) of the ventilation system (10) of the box (1) being connected to the inlet of the condensation separator (41). the outlet is connected to the inlet of the demister (7), the outlet of which is connected to the inlet of the adsorption unit (23), the outlet of which is connected to the inlet of the vacuum pump (22) providing vacuum throughout the device (39). 11 drawings List of reference marks 1 mobile box for on-site thermal decontamination of solid materials 2 ceiling panel 3 wall panel without holes 4 wall panel with through holes for temperature sensors 5 wall panel with through holes for hot air heat distribution 6 wall panel with through holes for microwave heat distribution 7 demister 8 shows the outlet of the box ventilation system 9 heat distribution 10 Venting system 11 side edge of the panel 12 inside the panel -9EN 33334 Ul panel edge overhang panel connection through hole heat distribution microwave through hole heat distribution hot air through hole temperature sensor temperature sensor vertical venting tube horizontal venting tube removable venting tube clamp on box wall vacuum pump adsorption unit connecting hole horizontal venting tube collector Air Hose Pipe Manifold Venting System Removable Screw Joint Light Fuel Oil Burner Hot Water Tube Inlet Hot Water Tube Outlet Hot Water Tube Microwave Generator Waveguide Fireclay Two-arm Strut Longitudinal Spacer Anchor Member Two-Arm Strut External On-Site Thermal Decontamination Equipment venting duct condensation separator through hole for outlet of the draw-off box ventilation system etc. sealing flange