RU2768810C1 - Calcination plant with afterburning chamber - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention relates to annealing plant with front loading for firing elements of electric machines, stators and rotors by method of thermal destruction of insulating lacquer coating. Plant comprises a housing and a heater, an afterburning chamber of volatile fractions of annealing products, installed on the wall panel of the housing and directly connected to the outlet channel of the heating chamber, which is cleaned periodically depending on the intensity of the plant through the detachable covers and the lower container, wherein the furnace body, along the perimeter of the inner surface of which there are three rows of compartments lined with refractory bricks, inside which there is a heater, laid in a ceramic tube filled with a heat-conducting filler, consists of a base, wall panels, on the front pillars of which there are cargo truck door locking devices, and a ceiling panel, in which there is an explosion-proof hatch for discharge of static pressure in the furnace, a cargo trolley for mechanized supply of articles to be fired into the chamber, which platform front wall is the roasting plant housing door, moving along the housing base stationary guides and along the attached guides by means of a roller chain driven by a trolley drive mechanism, which includes an electric motor, a worm gear, chain transmission, friction clutch, drive shaft and chain transmission mounted at the rear and attached to the base of the housing; free-standing furnace control cabinet (panel), in which the equipment is installed, which allows to adjust the thermal power in accordance with the required characteristics, to automatically maintain the required temperature in the plant chambers, as well as to set duration of operation of heaters and exhaust fan, switched by power wires laid separately in cable channels or in protective sleeves, with roasting installation, on the housing of which there is a removable protective shield, under which spiral terminals (jumpers) are brought out, intended for switching with the control cabinet.

EFFECT: providing destruction of lacquer insulation in the chamber without air access, taking into account decomposition of insulation without burning.

1 cl, 5 dwg

Description

The invention relates to electrothermal equipment intended for firing elements of electrical machines (stators and rotors) by thermal destruction (pyrolysis) of insulation (lacquer coating), in order to further extract the windings, during a major overhaul.

The plant is equipped with a chamber for afterburning volatile fractions of the roasting products (pyrolysis).

A resistance electric furnace is known from the materials of the book "Thermal Engineering Calculations of Metallurgical Furnaces" edited by A.S. Telegin, 2nd edition. Moscow: Metallurgy, 1982, p. 343, fig. 63. UDC 669.04.

The electric resistance furnace contains a lined chamber with a vault, heaters located on the walls of the chamber, an opening for venting gases.

The disadvantage of the technical solution is the incomplete afterburning directly in the electric furnace of the gases generated during the firing of the insulation of the windings of electrical machines (for their recycling), as well as the additional energy costs for their afterburning.

Known electric resistance furnace, consisting of a lined chamber with a vault, heaters located on the walls of the chamber, holes for exhaust gases, equipped with a torch burner, a pipe for supplying oxygen-containing gas and located under the vault, a heat-resistant hollow element, one end of which, the input, is in communication with the lined chamber, and the other - with a hole for venting, while the torch burner and pipe are located opposite the entrance of the complete element. (Patent No. 2125692 "Electric furnace of resistance" authors: Evsyukov V.N., Kozlov D.D., Shaforostov V.P., Bubnov S.Yu., Sinitsky V.B., publ. 27.01.1999).

The disadvantage of the technical solution is that this technical solution allows only the firing of the insulation of the windings of electrical machines, while not ensuring the uniformity of the insulation firing.

The closest analogue of the claimed invention in technical essence is a furnace known from RU No. 2125692 C1, F27B 5/00, 27.01.1999.

The objective of the invention is to create an improved roasting plant designed for automatic firing of the insulation of the windings of electric motors in order to destroy this insulation, in a chamber without air access, taking into account the decomposition of the insulation without combustion (pyrolysis).

The task is achieved by the fact that the front-loading firing unit, containing a body and a heater, characterized in that it is equipped with an afterburner mounted on the wall panel of the body and directly connected to the outlet channel of the heating chamber, which is cleaned periodically depending on the intensity of the installation through removable covers in the lower tank, while the furnace body, along the perimeter of the inner surface of which there are three rows of compartments lined with refractory bricks, inside which there is a heater laid in a ceramic tube filled with heat-conducting filler, consists of a base, wall panels, on the front racks which are the locking devices for the door of the cargo trolley, and the ceiling panel, in which there is an explosion-proof hatch for relieving static pressure in the furnace; a cargo trolley designed for mechanized supply of products to be fired into the chamber, the front wall of the platform of which is the door of the body of the firing plant, moving along the stationary guides of the base of the body and along the attached guides by means of a roller chain, driven by the trolley drive mechanism, which includes an electric motor, worm gear, chain drive, friction clutch, drive shaft and chain drive mounted at the rear and attached to the base of the housing; and a separate cabinet (panel) for controlling the furnace, in which equipment is installed that allows you to adjust the heat output in accordance with the required characteristics, automatically maintain the required temperature in the chambers of the installation, and also set the duration of the heaters and the exhaust fan, switched by power wires laid separately in cable channels or in protective sleeves, with a firing unit, on the body of which there is a removable protective shield, under which the spiral terminals (jumpers) are displayed, intended for switching with the control cabinet.

The positive effect of the invention is manifested in the fact that the proposed technical solution for creating a roasting plant with an afterburner designed for firing the winding insulation allows you to create an improved installation for firing the insulation of the windings of electric motors in order to destroy it, the advantage of which is to minimize environmental damage during operation, for account of additional equipment with an afterburner chamber.

The essence of the claimed invention is illustrated by drawings, where:

In FIG. 1 - Three-dimensional model of the general device of the kiln plant with an afterburner;

In FIG. 2 - Three-dimensional model of locking devices for fixing the front door of the cargo trolley;

In FIG. 3 - Three-dimensional model of the post-combustion chamber of the roasting plant;

In FIG. 4 - Electrical connection diagram;

In FIG. 5 - Electrical circuit diagram;

In FIG. 5a - Electrical circuit diagram (continued).

The front-loading firing plant comprises a housing 1 and a heater. The firing plant is equipped with an afterburner chamber 2, which is installed on the wall panel 3 of the housing 1 and is directly connected to the outlet channel of the heating chamber, which is periodically cleaned depending on the intensity of the installation through removable covers in the lower tank. In this case, the body 1 of the furnace, along the perimeter of the inner surface of which there are three rows of compartments lined with refractory bricks, inside which there is a heater laid in a ceramic tube filled with heat-conducting filler, consists of a base 4, wall panels 3, on the front racks of which there are locking devices 5 the door of the cargo trolley 6, and the ceiling panel 7, in which there is an explosion-proof hatch 8 for relieving static pressure in the furnace. The cargo trolley is designed for mechanized supply of products to be fired into the chamber. The front wall of the platform of the cargo trolley is the door 6 of the body 1 of the firing plant, it moves along the stationary guides of the base of the body 1 and along the attached guides 9 by means of a roller chain driven by the drive mechanism of the trolley 10 installed at the back and attached to the base of the body 1. The drive mechanism of the trolley 10 includes an electric motor 11, a worm gear 12, a chain drive 13, a friction clutch, a drive shaft and a chain drive, which are located inside the afterburner chamber 2. Separately, there is a control cabinet for the furnace 14, in which equipment is installed that allows you to adjust the heat output in accordance with the required characteristics, automatically maintain the required temperature in the chambers of the installation, and also set the duration of the operation of the heaters and the exhaust fan. The control cabinet of kiln 14 is connected to the firing plant by power wires laid separately in cable channels or in protective sleeves. On the body 1 of the firing unit there is a removable protective shield 15, under which the terminals of the spiral (jumpers) are displayed, intended for switching with the control cabinet 14.

Roasting plant works as follows.

1. Turn on the introductory machine (QF1).

2. Disconnect locking devices 5 doors.

3. We roll out the cargo trolley with vertical door 6 from the container.

4. We load the trolley with products to be fired.

5. We roll the cargo trolley into the oven container.

6. We fix the door with locking devices 5.

7. Select the firing program.

8. Turn on the ventilation by pressing the button "EXHAUST VENTILATION. START” (the button is located inside control cabinet 14, behind the door).

9. We start the program execution (the "START / STOP" button on the controller panel).

10. The installation is turned off:

- automatically at the end of the technologist's program (plus 2 hours of exhaust ventilation);

- when the regulator is turned off (the “START/STOP” button on the regulator panel) (plus 2 hours of exhaust ventilation operation).

11. At the end of the installation cycle and after it has cooled down, we roll out and unload the cargo trolley.

Thus, the proposed design of an improved calcining plant with an afterburning chamber makes it possible to create a calcining installation designed for automatic firing of the insulation of electric motor windings in order to destroy this insulation, in a chamber without air access, taking into account the decomposition of the insulation without combustion (pyrolysis).

Claims (1)

A front-loading roasting plant, comprising a body and a heater, characterized in that it is equipped with an afterburner installed on the wall panel of the body and directly connected to the outlet channel of the heating chamber, which is periodically cleaned depending on the intensity of the installation through removable covers and a lower tank , while the furnace body, along the perimeter of the inner surface of which there are three rows of compartments lined with refractory bricks, inside which there is a heater laid in a ceramic tube filled with heat-conducting filler, consists of a base, wall panels, on the front posts of which there are locking devices for the cargo door trolley, and a ceiling panel in which there is an explosion-proof hatch for relieving static pressure in the furnace, a cargo trolley designed for mechanized supply of products to be fired into the chamber, the front wall of the platform of which is the door of the firing unit housing moving along the stationary guides of the base of the body and along the attached guides by means of a roller chain, driven by a trolley drive mechanism, including an electric motor, a worm gear, a chain drive, a friction clutch, a drive shaft and a chain drive, mounted at the back and attached to the base of the body ; a separate cabinet-panel for controlling the furnace, in which equipment is installed that allows you to adjust the heat output in accordance with the required characteristics, automatically maintain the required temperature in the chambers of the installation, and also set the duration of the heaters and the exhaust fan, switched by power wires laid separately in the cable - channels or in protective sleeves, with a firing unit, on the body of which there is a removable protective shield, under which the terminals of the jumper spiral are displayed, intended for switching with the control cabinet.

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