CN219571889U - Steam supply device of RH refining furnace - Google Patents

Abstract

The utility model discloses a steam supply device of an RH refining furnace, which comprises a heat accumulator, wherein the air inlet end of the heat accumulator is connected to a converter steam output pipe, the air outlet end of the heat accumulator is connected to a RH refining furnace vacuum system through a heating pipeline, a heat exchange coil is arranged in the heat accumulator, the inlet of the heat exchange coil is connected with a converter flue gas pipeline, and the outlet of the heat exchange coil is connected with a flue gas purification system; a first electric heater is arranged in the heating pipeline, a heat conduction fin is fixed on the surface of the first electric heater, and a temperature regulator is arranged at the tail end of the heating pipeline; the temperature regulator comprises a heat conduction shell, a second electric heater is arranged in the heat conduction shell, a plurality of flow guide through holes are formed in the heat conduction shell, a shrinkage part is arranged in the flow guide through holes, a flow guide plate is fixed on the inner side of the shrinkage part, steam flowing through the shrinkage part is enabled to rotate by the flow guide plate, a plurality of bypass through holes are formed in the outer side of the shrinkage part, and a buffer cavity is connected to the tail end of the flow guide through holes. The utility model improves the defects of the prior art and reduces the manufacturing cost of equipment.

Description

Steam supply device of RH refining furnace

Technical Field

The utility model relates to metallurgical matching equipment, in particular to a steam supply device of an RH refining furnace.

Background

An RH refining furnace is a device which uses steam to generate vacuum and then drives molten steel to carry out cyclic degassing refining. In the prior art, the RH refining furnace is usually supplied by using the steam generated by the converter, but the temperature of the converter steam does not usually reach the use requirement of the RH refining furnace, and the steam also has the problem of heat dissipation in the storage process of the heat accumulator, so that a steam heating device is required to be additionally arranged to enable the steam supplied to the RH refining furnace to reach the use temperature. Chinese patent 201610814621.2 discloses a device for heating steam using microwaves. However, this device is relatively expensive to manufacture.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a steam supply device of an RH refining furnace, which can solve the defects of the prior art and reduce the manufacturing cost of equipment.

In order to solve the technical problems, the technical scheme adopted by the utility model is as follows.

The steam supply device of the RH refining furnace comprises a heat accumulator, wherein an air inlet end of the heat accumulator is connected to a converter steam output pipe, an air outlet end of the heat accumulator is connected to a RH refining furnace vacuum system through a heating pipeline, a heat exchange coil is installed in the heat accumulator, an inlet of the heat exchange coil is connected with a converter flue gas pipeline, and an outlet of the heat exchange coil is connected with a flue gas purification system; a first electric heater is arranged in the heating pipeline, a heat conduction fin is fixed on the surface of the first electric heater, and a temperature regulator is arranged at the tail end of the heating pipeline; the temperature regulator comprises a heat conduction shell, a second electric heater is arranged in the heat conduction shell, a plurality of flow guide through holes are formed in the heat conduction shell, a shrinkage part is arranged in the flow guide through holes, a flow guide plate is fixed on the inner side of the shrinkage part, steam flowing through the shrinkage part is enabled to rotate by the flow guide plate, a plurality of bypass through holes are formed in the outer side of the shrinkage part, and a buffer cavity is connected to the tail end of the flow guide through holes.

Preferably, a metal filter screen layer is installed in the buffer chamber.

Preferably, a bypass pipe is arranged between the buffer chamber and the heat accumulator, and a flow regulating valve is arranged on the bypass pipe.

The beneficial effects brought by adopting the technical scheme are as follows: the utility model uses an electric heater with lower price than the microwave heating unit to heat the steam, and simultaneously utilizes the converter flue gas to preheat the steam in the heat accumulator. In order to solve the problem of uneven steam heating of the existing electric heater, the utility model specially designs a temperature regulator. After the steam is heated for the first time by the first electric heater, the steam is heated for the second time in the temperature regulator. The attemperator adopts an integrated heat conduction shell, utilizes a second electric heater to heat the heat conduction shell, then makes steam fully dispersed in different flow guide through holes, and performs contact heat exchange with the heat conduction shell, so that the temperature of the steam can be quickly and accurately adjusted in a short time. The steam generated from the necking part and the steam directly flowing through the bypass through hole are mixed, so that the heating uniformity of the steam in the heat conducting shell can be further improved. The buffer chamber is used for collecting and buffering the steam flowing out of different flow guide through holes, the metal filter screen layer filters the steam on one side, and the heat transmitted by the heat conduction shell is utilized to contact and heat the steam again, so that the heating efficiency of the temperature regulator on the steam is further improved. By providing the bypass pipe, it is possible to quickly suppress the temperature fluctuation of the output steam by supplementing the low-temperature steam when the steam temperature fluctuation exceeds the temperature set value. According to measurement and calculation, on the premise of the same steam supply quantity, compared with a microwave heating unit, the system can reduce the equipment cost by about 10-15%, and meanwhile, the fault rate is obviously reduced.

Drawings

Fig. 1 is a block diagram of one embodiment of the present utility model.

Fig. 2 is a block diagram of a thermostat according to an embodiment of the present utility model.

Detailed Description

Referring to fig. 1-2, one specific embodiment of the utility model comprises a heat accumulator 1, wherein an air inlet end of the heat accumulator 1 is connected to a converter steam output pipe 2, an air outlet end of the heat accumulator 1 is connected to an RH refining furnace vacuum system 4 through a heating pipeline 3, a heat exchange coil 5 is arranged in the heat accumulator 1, an inlet of the heat exchange coil 5 is connected with a converter flue gas pipeline 6, and an outlet of the heat exchange coil 5 is connected with a flue gas purification system 7; a first electric heater 8 is arranged in the heating pipeline 3, a heat conducting fin 9 is fixed on the surface of the first electric heater 8, and a temperature regulator 10 is arranged at the tail end of the heating pipeline 3; the thermostat 10 comprises a heat conduction shell 11, a second electric heater 12 is installed in the heat conduction shell 11, a plurality of flow guide through holes 13 are formed in the heat conduction shell 11, a shrinkage part 14 is arranged in the flow guide through holes 13, a flow guide plate 15 is fixed on the inner side of the shrinkage part 14, steam flowing through the shrinkage part 14 is rotated by the flow guide plate 15, a plurality of bypass through holes 16 are formed in the outer side of the shrinkage part 14, and a buffer chamber 17 is connected to the tail end of the flow guide through holes 13. The steam is subjected to secondary heating in the thermostat 10 after being subjected to primary heating by the first electric heater 8. The thermostat 10 adopts an integrated heat conduction shell 11, and after the heat conduction shell 11 is heated by the second electric heater 12, steam is fully dispersed in different flow guide through holes 13 and is in contact heat exchange with the heat conduction shell 11, so that the temperature of the steam can be quickly and accurately adjusted in a short time. The steam generated from the rotation of the throat portion 14 is mixed with the steam directly flowing through the bypass through hole 16, and the uniformity of heating of the steam in the heat conductive housing 11 can be further improved. A metal screen layer 18 is installed in the buffer chamber 17. The buffer chamber 17 is used for collecting and buffering the steam flowing out of different diversion through holes 13, the metal filter screen layer 18 filters the steam on one side, and the metal filter screen layer 18 can contact and heat the steam again by utilizing the heat transferred by the heat conduction shell 11, so that the heating efficiency of the thermostat 10 on the steam is further improved. A bypass pipe 19 is installed between the buffer chamber 17 and the regenerator 1, and a flow regulating valve 20 is installed on the bypass pipe 19. The temperature fluctuation of the output steam is rapidly suppressed by supplying low-temperature steam when the steam temperature fluctuation exceeds the temperature set value.

What needs to be specifically stated is: the novel steam supply device is also provided with a temperature measuring element correspondingly, and the power control unit controls the heating power of the electric heater according to the steam temperature. The control device belongs to the prior known technology (for example, the temperature control device is also used in the Chinese patent 201610814621.2), and the working principle, the temperature control mode and the parts thereof all belong to common general knowledge, so the control device is not described in detail herein. This does not affect the implementation of the technical solution according to the utility model by those skilled in the art.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (3)

1. The utility model provides a steam supply device of RH refining furnace, includes regenerator (1), and the inlet end of regenerator (1) is connected to converter steam output tube (2), and the end of giving vent to anger of regenerator (1) is connected to RH refining furnace vacuum system (4) through heating pipeline (3), its characterized in that: a heat exchange coil (5) is arranged in the heat accumulator (1), an inlet of the heat exchange coil (5) is connected with a converter flue gas pipeline (6), and an outlet of the heat exchange coil (5) is connected with a flue gas purification system (7); a first electric heater (8) is arranged in the heating pipeline (3), a heat conduction fin (9) is fixed on the surface of the first electric heater (8), and a temperature regulator (10) is arranged at the tail end of the heating pipeline (3); the thermostat (10) comprises a heat conduction shell (11), a second electric heater (12) is installed in the heat conduction shell (11), a plurality of flow guide through holes (13) are formed in the heat conduction shell (11), a shrinkage part (14) is arranged in the flow guide through holes (13), a guide plate (15) is fixed on the inner side of the shrinkage part (14), steam flowing through the shrinkage part (14) is enabled to rotate by the guide plate (15), a plurality of bypass through holes (16) are formed in the outer side of the shrinkage part (14), and a buffer cavity (17) is connected to the tail end of the flow guide through holes (13).

2. The steam supply device of an RH refining furnace according to claim 1, wherein: a metal filter screen layer (18) is arranged in the buffer chamber (17).

3. A steam supply device of an RH refining furnace according to claim 2, characterized in that: a bypass pipe (19) is arranged between the buffer chamber (17) and the heat accumulator (1), and a flow regulating valve (20) is arranged on the bypass pipe (19).