Smoke component control device for treating hazardous waste by oxygen-enriched side-blown converter

Abstract

The utility model relates to the technical field of oxygen-enriched side-blown furnaces, in particular to a flue gas component control device during hazardous waste treatment of an oxygen-enriched side-blown furnace, which comprises an oxygen-enriched side-blown furnace body, a slag charge feeding hopper used for feeding slag charge is fixedly mounted on the oxygen-enriched side-blown furnace body, the iron content in the slag charge is 20-25%, the silicon content is more than 30%, and the oxygen-enriched side-blown furnace body is fixedly mounted on the slag charge feeding hopper. The oxygen-enriched side-blown converter body is fixed to a square positioning seat, a square mounting sleeve is fixedly mounted at the top of the square positioning seat, a vertical mounting groove and a vertical limiting groove are formed in the inner wall of the square mounting sleeve, a lifting type cooling assembly is mounted in the vertical mounting groove, and a thermal expansion type automatic control assembly is fixedly mounted at the bottom of the oxygen-enriched side-blown converter body. According to the oxygen-enriched side-blown converter, the generation of nitrogen oxides can be reduced, the content does not exceed the national environmental protection standard, starting and operation of SCR, SNCR and ozone denitration are avoided, the cost is effectively reduced, meanwhile, the temperature of the oxygen-enriched side-blown converter body can be kept better, heat balance is easy to control, coal consumption is reduced, and the oxygen-enriched side-blown converter can operate stably for a long time.

Description

Technical Field

[0001] The utility model specifically relates to a smoke component control device when an oxygen-enriched side-blowing furnace treats hazardous waste, and belongs to the technical field of oxygen-enriched side-blowing furnaces. Background Art

[0002] The main component of oxygen-enriched side-blowing smelting flue gas is nitrogen. When the flue gas temperature reaches above 1200, nitrogen and oxygen react to generate nitrogen oxides, which are harmful gases. Oxygen-enriched side-blowing smelting flue gas contains a certain concentration of sulfur dioxide gas, which mainly depends on the sulfur content in the material ratio, which is a harmful gas. Oxygen-enriched side-blowing smelting flue gas contains a certain concentration of carbon monoxide gas, which mainly depends on the oxygen-carbon ratio and the slag type ratio. Carbon monoxide has a great influence on the ionic liquid acid making process and is also a harmful gas. The existing nitrogen oxides are currently eliminated by SCR, SNCR and ozone denitrification, which is costly. At the same time, the oxygen-carbon ratio is high, which easily causes the overall temperature to be high, and the thermal balance is difficult to control. The bubbling and evaporation in the furnace is too large, and too much nitrogen oxides are generated. It is difficult to control various indicators, and there are certain disadvantages in the use process.

[0003] In view of this, the present utility model is proposed. Utility Model Content

[0004] The purpose of the utility model is to provide a flue gas composition control device for treating hazardous waste in an oxygen-enriched side-blowing furnace in order to solve the above-mentioned problems. The device has the advantages of reducing the generation of nitrogen oxides, the content of which does not exceed the national environmental protection standards, avoiding the start-up and operation of SCR, SNCR and ozone depletion, and effectively reducing costs. At the same time, the temperature of the oxygen-enriched side-blowing furnace body can be maintained at a good level, the thermal balance can be easily controlled, the coal consumption can be reduced, and the device can operate stably for a long time.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: a flue gas composition control device for treating hazardous waste in an oxygen-enriched side-blowing furnace, comprising an oxygen-enriched side-blowing furnace body, a slag feeding bucket for feeding slag is fixedly installed on the oxygen-enriched side-blowing furnace body, and the iron content in the slag is 20%-25%, and the silicon content is above 30%, the oxygen-enriched side-blowing furnace body is fixed on the square positioning seat, the square mounting sleeve is fixedly installed on the top of the square positioning seat, the square mounting sleeve is sleeved on the oxygen-enriched side-blowing furnace body, the vertical mounting groove and the vertical limiting groove are opened on the inner wall of the square mounting sleeve, the lifting and cooling component is installed in the vertical mounting groove, and the lifting and cooling component is clamped in the vertical limiting groove, the thermal expansion type automatic control component is fixedly installed on the bottom of the oxygen-enriched side-blowing furnace body, and the thermal expansion type automatic control component is electrically connected to the lifting and cooling component.

[0006] Furthermore, in order to control the reciprocating drive motor to be turned on so that the vertical drive threaded rod can rotate in the vertical mounting groove through the rotating joint, the lifting cooling assembly includes the reciprocating drive motor, the vertical drive threaded rod and the vertical limiting slide rod, the reciprocating drive motor is fixed on the inner wall of one end of the vertical mounting groove, the vertical drive threaded rod is rotatably installed on the inner wall of the other end of the vertical mounting groove through the rotating joint, and one end of the vertical drive threaded rod is fixedly connected to the output shaft of the reciprocating drive motor.

[0007] Furthermore, in order to enable the lifting slider to slide up and down in the vertical mounting groove when the vertical driving threaded rod rotates, the lifting slider is threadedly sleeved on the vertical driving threaded rod, and the lifting slider is slidably engaged in the vertical mounting groove.

[0008] Furthermore, in order to enable the heat dissipation fan to move up and down through the square mounting frame when the lifting slider moves up and down, thereby realizing all-round heat dissipation of the outer wall of the oxygen-enriched side-blowing furnace body, the square mounting frame is fixedly installed on the lifting slider, the square mounting frame is sleeved on the oxygen-enriched side-blowing furnace body, and the heat dissipation fan is fixedly installed on the inner wall of the square mounting frame.

[0009] Furthermore, in order to limit the square mounting frame by the vertical limit slide bar and the limit slider so that the rising and falling of the square mounting frame are smoother, the vertical limit slide bar is fixed in the vertical limit groove, the limit slider is slidably sleeved on the vertical limit slide bar, and the limit slider is fixedly connected to the square mounting frame.

[0010] Furthermore, in order to enable the thermal expansion block to expand when the heat conduction plate is heated, the thermal expansion automatic control component includes the fixed mounting plate and the heat conduction plate, the fixed mounting plate is fixed to the bottom of the oxygen-enriched side-blowing furnace body through the connecting column, the heat conduction plate is fixedly attached to the bottom of the oxygen-enriched side-blowing furnace body, and the thermal expansion block is fixedly installed on the heat conduction plate.

[0011] Furthermore, in order to enable the control switch to be pressed when the heat expansion block expands to achieve the opening and closing control of the lifting and cooling component, the control switch is fixed on the inner wall of the fixed mounting plate, and the control switch is used to control the lifting and cooling component. The heat expansion block vertically corresponds to the control switch.

[0012] Furthermore, in order to adjust and control the pressure blown into the oxygen-enriched side-blowing furnace body through the air pressure control valve, the oxygen blowing conduit is fixedly installed on the oxygen-enriched side-blowing furnace body, and the air pressure control valve is fixedly installed on the oxygen blowing conduit.

[0013] The technical effects and advantages of the utility model are as follows: through the reasonable configuration of slag type, the generation of nitrogen oxides can be reduced, the content does not exceed the national environmental protection standard, the start-up and operation of SCR, SNCR and ozone desulfurization can be avoided, and the cost can be effectively reduced; carbon monoxide can be controlled within a reasonable range (less than 5%), the effect on ionic liquid desulfurization is small, the shutdown due to ionic liquid poisoning can be avoided, and long-term stable and continuous operation can be achieved;

[0014] At the same time, by controlling the lifting and cooling components through the thermal expansion automatic control components, the temperature of the oxygen-enriched side-blowing furnace body can be maintained at a good level, the thermal balance is easy to control, the matte grade and the copper content in the slag are easier to control and change less, thus reducing coal consumption and ensuring long-term stable operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the explosion structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the thermal expansion type automatic control component of the utility model;

[0018] Figure 4 This is a schematic diagram of the installation structure of the lifting and cooling component of the utility model;

[0019] Figure 5 This is a schematic diagram of the overall structure of the lifting and cooling component of the utility model;

[0020] In the figure: 1. Oxygen-enriched side-blowing furnace body; 2. Slag delivery bucket; 3. Square positioning seat; 4. Square mounting sleeve; 5. Vertical mounting slot; 6. Vertical limit slot; 7. Lifting cooling assembly; 701. Reciprocating drive motor; 702. Vertical drive threaded rod; 703. Vertical limit slide bar; 704. Rotating joint; 705. Lifting slide block; 706. Square mounting frame; 707. Cooling fan; 708. Limit slide block; 8. Thermal expansion automatic control assembly; 801. Fixed mounting plate; 802. Heat conduction plate; 803. Connecting column; 804. Thermal expansion block; 805. Control switch; 9. Oxygen blowing duct; 10. Air pressure control valve. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-5 As shown, a flue gas composition control device for treating hazardous waste in an oxygen-enriched side-blowing furnace comprises an oxygen-enriched side-blowing furnace body 1, on which a slag feeding hopper 2 for feeding slag is fixedly installed, and the iron content in the slag is 20%-25%, and the silicon content is above 30%. The iron content in the slag is controlled to be 20%-25%, and the silicon content is above 30%. The temperature of the oxygen-enriched side-blowing furnace body 1 is controlled between 1250°C and 1300°C. Through a large number of production practices, it is concluded that when the iron content in the slag is higher than 25% and the silicon content is lower than 30%, the melting point of the slag is reduced, and the slag is kept at a good fluidity. The temperature can be lowered and the amount of ore added can be increased. However, due to the increase in iron, when the temperature is controlled too high, ferrous oxide does not completely react with silicon to form fayalite, which is more likely to cause the overoxidation of ferrous oxide to generate ferroferric oxide, which makes the coal not have enough oxygen to react, and carbon monoxide is easily generated, and the carbon monoxide curve rises accordingly. With the formation of ferroferric oxide, the slag melting point rises, the slag temperature drops, the oxidation trend of iron weakens, and the coal has enough oxygen to react, and the carbon monoxide curve will fall. Then it is necessary to add coal, oxygen, and reduce materials to raise the furnace temperature and maintain production. When iron is controlled between 20% and 25% and silicon is above 30%, the ferrous oxide generated by the reaction of iron and oxygen in the smelting process is captured by sufficient silicon in time to form fayalite, and its overoxidation conditions are difficult to achieve. Even if the temperature is occasionally high, overoxidation is not easy to occur, and it will not cause an imbalance in the use of oxygen between the elements.

[0023] The oxygen-enriched side-blowing furnace body 1 is fixed on a square positioning seat 3, a square mounting sleeve 4 is fixedly installed on the top of the square positioning seat 3, the square mounting sleeve 4 is sleeved on the oxygen-enriched side-blowing furnace body 1, a vertical mounting groove 5 and a vertical limit groove 6 are opened on the inner wall of the square mounting sleeve 4, a lifting type cooling component 7 is installed in the vertical mounting groove 5, and the lifting type cooling component 7 is clamped in the vertical limit groove 6, a thermal expansion type automatic control component 8 is fixedly installed at the bottom of the oxygen-enriched side-blowing furnace body 1, and the thermal expansion type automatic control component 8 is connected to the lifting type cooling component 7. The cooling component 7 is electrically connected. When in use, when the oxygen-enriched side-blowing furnace body 1 is too high, the lifting cooling component 7 is opened and controlled by the thermal expansion type automatic control component 8 to achieve cooling of the oxygen-enriched side-blowing furnace body 1. The thermal expansion type automatic control component 8 is continuous and only performs cooling operation when the oxygen-enriched side-blowing furnace body 1 maintains a high temperature. In the event of accidental temperature adjustment, the cooling operation of the oxygen-enriched side-blowing furnace body 1 can be avoided, so that the temperature of the oxygen-enriched side-blowing furnace body 1 is more constant, thereby effectively reducing the flue gas temperature.

[0024] The lifting cooling assembly 7 includes a reciprocating drive motor 701, a vertical drive threaded rod 702 and a vertical limit slide 703. The reciprocating drive motor 701 is fixed on the inner wall of one end of the vertical mounting groove 5. The vertical drive threaded rod 702 is rotatably mounted on the inner wall of the other end of the vertical mounting groove 5 through a rotating joint 704, and one end of the vertical drive threaded rod 702 is fixedly connected to the output shaft of the reciprocating drive motor 701. A lifting slider 705 is threadedly sleeved on the vertical drive threaded rod 702. The lifting slider 705 is slidably engaged in the vertical mounting groove 5. A square mounting frame 706 is fixedly mounted on the lifting slider 705. The square mounting frame 706 is sleeved on the oxygen-enriched side-blowing furnace body 1, and a The heat dissipation fan 707, the vertical limit slide bar 703 is fixed in the vertical limit groove 6, the limit slider 708 is slidably sleeved on the vertical limit slide bar 703, and the limit slider 708 is fixedly connected to the square mounting frame 706. When in use, the reciprocating drive motor 701 is controlled to be turned on, so that the vertical drive threaded rod 702 rotates in the vertical mounting groove 5 through the rotating joint 704, driving the lifting slider 705 to slide up and down in the vertical mounting groove 5, thereby driving the square mounting frame 706 to move up and down, so that the heat dissipation fan 707 can cool the oxygen-enriched side-blowing furnace body 1 in all directions. At the same time, under the action of the vertical limit slide bar 703 and the limit slider 708, the stability of the heat dissipation fan 707 during the up and down movement can be guaranteed.

[0025] The thermal expansion automatic control component 8 includes a fixed mounting plate 801 and a heat conducting plate 802. The fixed mounting plate 801 is fixed to the bottom of the oxygen-enriched side-blowing furnace body 1 through a connecting column 803. The heat conducting plate 802 is fixedly attached to the bottom of the oxygen-enriched side-blowing furnace body 1. A thermal expansion block 804 is fixedly mounted on the heat conducting plate 802. A control switch 805 is fixed on the inner wall of the fixed mounting plate 801. The control switch 805 is used to control the lifting and cooling component 7. The thermal expansion block 804 corresponds vertically to the control switch 805. When the heat conducting plate 802 is heated, the thermal expansion block 804 expands to press the control switch 805. When the thermal expansion block 804 contracts, the control switch 805 is closed to realize the opening and closing control of the lifting and cooling component 7.

[0026] An oxygen blowing conduit 9 is fixedly installed on the oxygen-enriched side-blowing furnace body 1, and an air pressure control valve 10 is fixedly installed on the oxygen-enriched side-blowing furnace body 1. According to the law of conservation of energy, when the oxygen, fuel, material dosage, external conditions, etc. entering the furnace remain unchanged, the heat of the redox reaction in the oxygen-enriched side-blowing furnace body 1 is unchanged, and thermal balance can be maintained. However, corresponding to different slag types and control methods, the temperature area in the oxygen-enriched side-blowing furnace body 1 will be different. When the mixed oxygen pressure is higher than 85KPa, the oxygen-enriched side-blowing furnace body 1 will churn violently, the bubbling area will move up, and the overall temperature will move up accordingly. At this time, the melt temperature will decrease, the flue gas temperature will increase, and excessive nitrogen oxides will be easily generated in the secondary and tertiary air areas. At the same time, the fluidity of high-iron slag is much better than that of high-silicon slag, and the higher front reserve pressure of the oxygen-enriched side-blowing furnace body 1 is also likely to cause violent churning in the furnace and upward movement of the temperature range; therefore, the reserve pressure is usually controlled at about 75KPa to reduce the temperature range, and the high-silicon slag type strategy is adopted to further control the temperature range, try to maintain the molten pool temperature, and reduce the flue gas temperature.

[0027] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace, comprising an oxygen-enriched side-blowing furnace body (1), characterized in that: A slag delivery hopper (2) for delivering slag is fixedly mounted on the oxygen-enriched side-blowing furnace body (1), wherein the iron content in the slag is between 20% and 25%, and the silicon content is above 30%. The oxygen-enriched side-blowing furnace body (1) is fixed on a square positioning seat (3), a square mounting sleeve (4) is fixedly mounted on the top of the square positioning seat (3), the square mounting sleeve (4) is sleeved on the oxygen-enriched side-blowing furnace body (1), a vertical mounting groove (5) and a vertical limiting groove (6) are provided on the inner wall of the square mounting sleeve (4), a lifting and lowering cooling component (7) is installed in the vertical mounting groove (5), and the lifting and lowering cooling component (7) is clamped in the vertical limiting groove (6), a thermal expansion type automatic control component (8) is fixedly mounted on the bottom of the oxygen-enriched side-blowing furnace body (1), and the thermal expansion type automatic control component (8) is electrically connected to the lifting and lowering cooling component (7).

2. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace according to claim 1, characterized in that: The lifting cooling assembly (7) comprises a reciprocating drive motor (701), a vertical drive threaded rod (702) and a vertical limit sliding rod (703); the reciprocating drive motor (701) is fixed to the inner wall of one end of the vertical mounting groove (5); the vertical drive threaded rod (702) is rotatably mounted on the inner wall of the other end of the vertical mounting groove (5) via a rotating joint (704); and one end of the vertical drive threaded rod (702) is fixedly connected to the output shaft of the reciprocating drive motor (701).

3. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace according to claim 2, characterized in that: A lifting slider (705) is threadedly sleeved on the vertical driving threaded rod (702), and the lifting slider (705) is slidably engaged in the vertical installation groove (5).

4. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace as claimed in claim 3, characterized in that: A square mounting frame (706) is fixedly mounted on the lifting slider (705), the square mounting frame (706) is sleeved on the oxygen-enriched side-blowing furnace body (1), and a heat dissipation fan (707) is fixedly mounted on the inner wall of the square mounting frame (706).

5. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace as claimed in claim 4, characterized in that: The vertical limit slide bar (703) is fixed in the vertical limit groove (6), a limit slider (708) is slidably sleeved on the vertical limit slide bar (703), and the limit slider (708) is fixedly connected to the square mounting frame (706).

6. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace according to claim 1, characterized in that: The thermal expansion automatic control component (8) comprises a fixed mounting plate (801) and a heat conducting plate (802), wherein the fixed mounting plate (801) is fixed to the bottom of the oxygen-enriched side-blowing furnace body (1) via a connecting column (803), and the heat conducting plate (802) is fixedly attached to the bottom of the oxygen-enriched side-blowing furnace body (1), and a thermal expansion block (804) is fixedly mounted on the heat conducting plate (802).

7. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace according to claim 6, characterized in that: A control switch (805) is fixed on the inner wall of the fixed installation plate (801), and the control switch (805) is used to control the lifting and cooling component (7). The thermal expansion block (804) vertically corresponds to the control switch (805).

8. The device for controlling flue gas composition when treating hazardous waste in an oxygen-enriched side-blowing furnace according to claim 1, characterized in that: An oxygen blowing conduit (9) is fixedly mounted on the oxygen-enriched side-blowing furnace body (1), and an air pressure control valve (10) is fixedly mounted on the oxygen blowing conduit (9).

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