RU2059556C1 - Device for solution warming up - Google Patents

Abstract

FIELD: chemical engineering, nuclear technology. SUBSTANCE: device for solution warming up inside reservoir 1 includes block of electric heating elements plunged into solution, consisting of lattice 3, shell 6, working part 4 and tappings 5 of electric heating elements and connected with it through shell 13, ring 14, pipe 12 along which connecting lead 26 passes. The pipe is equipped with flange 1. By means of interlayer 18, flange 19, inserts 20 and bolts 21 flange 1 is thickened with cover 16 of trap-door-manhole of reservoir having hole 17. Prop 28 and guide 29 are used for holding up the block of electric heating elements. Compressed air is fed through pipe 27 into cavity 22 to control the density of interlayer 18. Interlayer 23, flange 24 and dowels 25 are used for forming hermetic reservoir 22. Jacket 32 and temperature-sensitive element 31 are on external wall of reservoir to control the temperature. During reconstruction the cover is removed, the block of electric heating elements and pipe 12 with connecting leads 26 are placed into reservoir, the thickening of the block with pipe is carried out. Ready-made assembly leans on props 28. Hole 17 is made in cover 16. Lining 18 is laid on flange 15. The cover is set up on trap-door-manhole of reservoir. Thickening members are mounted: flanges 19, 23, bolts 21, dowels 25, inserts 20, lining 23. Density of lining 18 is checked by feeding the compressed air into cavity 22 along pipe 27. EFFECT: enhanced reliability and safety of reservoir operation after equipment reconstruction. 3 dwg

Description

 The invention relates to a device for heating solutions inside a tank and can be used in the chemical industry and nuclear energy, mainly in the reconstruction of equipment.

 The closest in technical essence and the achieved result is a device for heating the solution, including a container with a manhole manhole with a lid, electric heating elements hermetically connected to the grill, the working part and the conclusions of which are located on opposite sides, while the grill with the help of studs with nuts and gaskets fixed to the tank body from its outer side, and the working part of the electric heating elements is located inside the tank. Conductors are connected to the terminals of the electric heating elements located on the outside of the tank, through which power is supplied. By means of this design, direct heating of the solution inside the tank is carried out.

 The design drawback is the difficult reconstruction of the tanks in operation, caused by the need to heat the solution contained in them, because to make holes in thick-walled tanks for installing electric heating elements and conducting heat treatment of the weld seam to weld the pipe to the tank for attaching the lid with electric heating elements outside the factory, a special equipment and accessories.

 The technical result from the use of the invention is to increase the reliability and safety of equipment by performing basic work in the factory, simplifying the installation of electric heating elements, reducing the complexity of the work.

 This result is achieved by the fact that the lattice with electric heating elements is installed inside the tank and provided with a tight shell around the terminals of the electric heating elements, while the device is equipped with an axial movement of the manhole cover with a pipe with a flange connected to the shell, which is made of two parts connected by welding or detachable elements. A conductor for powering the electric heating elements is located inside the pipe.

 In FIG. 1 shows a device for heating a solution, a longitudinal section; in FIG. 2 sealing the shell with the pipe using gaskets and studs; in FIG. 3 sealing the shell with the pipe by welding.

 The device for heating the solution includes a container 1 with a manhole with a cover 2, hermetically connected to the grate 3 electric heating elements, the working part 4 and conclusions 5 of which are located on opposite sides. The device is placed in a solution inside the container. A shell 6 is welded to the lattice on the side of the terminals with a joint ring 7 consisting of gaskets 8, studs 9 or a weld 10. The grill 3 with electric heating elements consisting of the working part 4, terminals 5, and the shell 6 form a block of electric heating elements. The ring 11 is connected to the pipe 12 directly or through the shell 13 and the ring 14. At the opposite end of the pipe, a flange 15 is connected from the outside. A hole 17 is made in the cap 16, it is hermetically connected to the flange 15 by means of a gasket 18, which is crimped by the flange 19, inserts 20 and bolts 21. To seal the cavity 22 between the pipe 12 and the cover 16, a gasket 23, a pressure flange 24, and studs 25 are installed. Inside the pipe 12, conductors 26, as well as a pipe 27, are used to control the tightness of the cavity 22. To maintain the unit, the electric heater s elements are stops 28 and the guide 29. In order to control the tightness of the lower tube connector set 30. To control the temperature at the outer surface of the tank temperature sensors 31 installed in the covers 32.

 Work with the device as follows.

 When reconstructing the tank (introducing the heating of the solution inside the tank), a block of electric heating elements and a pipe 12 are placed inside the tank through the manhole. A conductor 26 is passed through a pipe 12, connected to a block of electric heating elements, and the entire assembly is lowered to the stops 28. A gasket 18 is installed on the flange 15, a manhole cover is installed on top, through which a conductor is previously passed through an opening 17. The gasket 23, the pressure flange 24 are put on the pipe 12. Then the flange 19, the inserts 20 and the bolts 21 are installed. By tightening the bolts 21, the pipe 12 is pulled all the way to the stop of the flange 15 and gaskets 18 in the cover 16. After that, the studs 25 are installed by tightening which the gaskets are sealed. 23 through the pressure flange 24. To control the density of the seal between the flange 15 and the cover 16, air is supplied into the cavity 22 through the tube 27 and the pressure stability, characterizing the absence of leaks, is controlled.

 When replacing the block of electric heating elements, the studs 25 are weakened, then the bolts 21. The pipe 12 is lowered to the stop 28, and the manhole cover is removed. The pipe with the block of electric heating elements is lifted, brought out of contact with the stop 28 and the guide 29, and then shifted to one side of the manhole, thereby providing personnel access to the inside of the tank, or in a shifted position, lowered to the bottom of the tank, thereby freeing the manhole completely. Inside the tank, the maintenance personnel decompresses the rings 7, 11, disconnects the conductors 26 with the electric heating elements, removes the spent resource from the unit, and installs a new one. After installing a new unit, the upper end of the pipe is sealed with a plug and compressed air is supplied inside, by means of which the density of the connector is controlled. In the case of installing two gaskets in the connector for density control, air is supplied through the pipe 30 into the cavity between the gaskets. The subsequent operations are the same as during the initial installation.

 The invention allows the reconstruction of the tank with the introduction of heating the solution, making all the components in the factory, including making holes in the manhole cover, which, unlike the tank itself, is easily transported. As a result of this, the reliability and safety of work are increased. The invention allows to carry out without dismantling the reconstruction of tanks in operation without the use of special tools, fixtures and equipment necessary for making holes in thick-walled tanks, welding flanges and heat treatment, and also allows reconstruction in crowded conditions. The operation of the vessel after the reconstruction of the proposed invention is highly economical, since the solution is directly heated inside the tank.

Claims (1)

 DEVICE FOR SOLUTION HEATING, including a container with a manhole with a cover, hermetically connected to the grate electric heating elements, the working part and the conclusions of which are located on its opposite sides, characterized in that the grating is installed in the tank and is equipped with a sealed shell from the terminals of the electric heating elements, while the device is equipped with a tube mounted in the manhole cover with axial movement with a flange associated with the shell, and the latter is made of two parts, soy Inonii by welding or by releasable elements.

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