Barrel opening waste gas incineration treatment system

Abstract

The invention discloses a barrel opening waste gas incineration treatment system. Inlets of a plurality of vacuum units are connected with the upper ends of a plurality of iron barrels through hoses correspondingly. Outlets of the plurality of vacuum units are respectively connected with the demisting tower through pipelines; the demisting tower is connected with the rotary kiln through a pipeline; the rotary kiln is connected with the secondary combustion chamber through a pipeline; the secondary combustion chamber is connected with the waste heat boiler through a pipeline; the waste heat boiler is connected with the quench tower through a pipeline; the quench tower is connected with the dry deacidification tower through a pipeline; the dry deacidification tower is connected with the bag-type dust collector through a pipeline; the bag-type dust collector is connected with the precooler through a pipeline; an induced draft fan is arranged on the pipeline between the bag-type dust collector and the precooler; the precooler is connected with the wet desulfurization tower through a pipeline; and the wet desulfurization tower is connected with the flue gas heater through a pipeline. According to the barrel opening waste gas incineration treatment system, waste gas is harmlessly treated in an incineration mode, and compared with a spraying tower absorption mode or other treatment modes, the generated harm is smaller, and the removal efficiency is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of waste gas treatment, and in particular to an open barrel waste gas incineration treatment system. Background Art

[0002] The reasonable recycling and treatment of toxic and harmful gases is a hot research direction and theme in current environmental governance. Since the raw materials in the food, materials, electronics and other industries are basically packed in iron barrels, the amount of iron barrels that need to be recycled every year is huge.

[0003] The volatile residual liquid and gas in the scrap iron barrels have brought great difficulties to the recycling of scrap iron barrels. Although the waste gas from the barrels can be recycled and then treated by a spray tower, the main principle of the spray tower is that the waste gas is fully in contact with the liquid, and its solubility in water or chemical reaction is used to reduce its concentration by adding drugs, so as to become clean gas that meets national emission standards. In this process, the organic and inorganic substances in the recovered gas are only treated by some chemicals and alkaline washing, which often cannot deal with the toxic and harmful components well and there is a risk of substandard exhaust emissions. Summary of the invention

[0004] In view of this, the present invention proposes a barrel waste gas incineration treatment system, which harmlessly treats the waste gas by incineration.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An open barrel waste gas incineration treatment system, including a vacuum unit, a demisting tower, a rotary kiln, a secondary combustion chamber, a waste heat boiler, a quenching tower, a dry deacidification tower, a bag filter, an induced draft fan, a precooler, a wet desulfurization tower and a flue gas heater;

[0007] The inlets of several vacuum units are respectively connected to the upper ends of several iron barrels through hoses; the outlets of several vacuum units are respectively connected to the defogger through pipelines; the defogger and the rotary kiln are connected through pipelines; the rotary kiln and the secondary combustion chamber are connected through pipelines; the secondary combustion chamber is connected to the waste heat boiler through pipelines; the waste heat boiler and the quenching tower are connected through pipelines; the quenching tower and the dry deacidification tower are connected through pipelines; the dry deacidification tower and the bag filter are connected through pipelines; the bag filter and the precooler are connected through pipelines; an induced draft fan is provided on the pipeline between the bag filter and the precooler; the precooler and the wet desulfurization tower are connected through pipelines; the wet desulfurization tower and the flue gas heater are connected through pipelines;

[0008] The slag and ash produced by the rotary kiln, the secondary combustion chamber, the waste heat boiler and the quenching tower are connected to cement raw material production equipment.

[0009] Furthermore, the vacuum units are three in number.

[0010] Furthermore, the wet desulfurization tower and the alkali solution circulation pool are connected via a pipeline.

[0011] Furthermore, the alkali solution circulation pool and the wastewater treatment workshop are connected via a pipeline.

[0012] Furthermore, the cement raw material production equipment includes a cement raw material production body, a batching chamber and a grinding device;

[0013] The two inner side walls of the cement raw material production body are fixed with a plurality of batching chambers from top to bottom; the front end and the rear end of each batching chamber are respectively provided with a discharge port and a feed port;

[0014] A grinding device is provided inside the cement raw material production body; the grinding device and the batching chamber are not in contact;

[0015] The bottom of the cement raw material production body is connected to a raw material outlet pipe; a solenoid valve is arranged on the raw material outlet pipe.

[0016] Furthermore, each batching chamber is provided with a plurality of batching plates from top to bottom;

[0017] A material distribution chamber is formed between every two adjacent material distribution plates;

[0018] The front end of the batching chamber is connected to each of the distribution chambers and is provided with a discharge branch pipe; all the discharge branch pipes are connected to the discharge main pipe; and each of the discharge branch pipes is provided with a solenoid valve;

[0019] The rear end of the batching chamber is connected to a feeding pipe corresponding to the position of each distribution chamber.

[0020] Further, the grinding device includes a motor, an inner rotating shaft, an outer heat transfer rod, a grinding disc, a heat transfer block, a heating block and a heat transfer disc;

[0021] The motor is fixedly arranged at the bottom end of the cement raw material production body;

[0022] The output shaft of the motor passes through the cement raw material production body and is fixedly connected to the inner rotating shaft inside the cement raw material production body;

[0023] An outer heat transfer rod is fixedly provided on the outer side of the inner rotating shaft;

[0024] A heating block is fixedly provided on the top end of the outer heat transfer rod;

[0025] A plurality of grinding discs are fixedly arranged on the outer side of the outer heat transfer rod from top to bottom in a circumferential direction; each of the grinding discs is located between every two adjacent batching chambers;

[0026] Each of the grinding discs has an inner accommodating groove formed therein; the inner end of the inner accommodating groove is connected to the outer heat transfer rod;

[0027] The upper end of each grinding disc is provided with a plurality of heat transfer holes connected to the inner accommodating groove; the lower end of each grinding disc is provided with a plurality of heat transfer holes connected to the inner accommodating groove;

[0028] A heat transfer plate is fixedly mounted inside each of the accommodating grooves; the inner end of the heat transfer plate is in contact with the outer heat transfer rod;

[0029] Heat transfer blocks are matched and fixedly arranged in all heat transfer holes; all heat transfer blocks are fixedly connected to the heat transfer plate; and all heat transfer blocks are not in contact with the batching chamber.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] (1) Safety: The barrel waste gas incineration treatment system provided by the present invention reduces the pressure of tail gas treatment from the source, and avoids the waste gas not meeting the standards during the gas treatment and emission process;

[0032] (2) Harmlessness: The barrel waste gas incineration treatment system provided by the present invention collects waste gas for incineration treatment, which is less harmful and has a higher removal efficiency than spray tower absorption or other treatment methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the structure of a barrel waste gas incineration treatment system provided in an embodiment of the present invention;

[0034] Figure 2 A three-dimensional diagram of a cement raw material production device provided by an embodiment of the present invention;

[0035] Figure 3 A top view of a cement raw material production device provided by an embodiment of the present invention;

[0036] Figure 4 for Figure 3 AA section view in the figure;

[0037] Figure 5 A three-dimensional diagram of the internal structure of a cement raw material production device provided in an embodiment of the present invention;

[0038] Figure 6 A three-dimensional diagram of the internal structure of a cement raw material production device provided in an embodiment of the present invention.

[0039] In the figure: 1. Vacuum unit; 2. Demisting tower; 3. Rotary kiln; 4. Secondary combustion chamber; 5. Waste heat boiler; 6. Rapid cooling tower; 7. Dry deacidification tower; 8. Bag filter; 9. Induced draft fan; 10. Precooler; 11. Wet desulfurization tower; 12. Flue gas heater; 13. Alkali circulation pool; 14. Wastewater treatment workshop; 15. Cement raw material production body; 16. Batching room; 17. Batching plate; 18. Distribution room; 19. Discharge branch pipe; 20. Discharge main pipe; 21. Feed pipe; 22. Inner rotating shaft; 23. External heat transfer rod; 24. Grinding disc; 25. Heat transfer block; 26. Heating block; 27. Heat transfer disc; 28. Motor. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Example:

[0044] like Figure 1-6 As shown, a barrel waste gas incineration treatment system includes a vacuum unit 1, a demisting tower 2, a rotary kiln 3, a secondary combustion chamber 4, a waste heat boiler 5, a quenching tower 6, a dry deacidification tower 7, a bag filter 8, an induced draft fan 9, a precooler 10, a wet desulfurization tower 11 and a flue gas heater 12.

[0045] The inlets of the three vacuum units 1 are connected to the upper ends of several iron barrels through hoses. The iron barrels contain raw materials for materials, electronics and other industries. The vacuum unit 1 is used to extract air to form a negative pressure in the iron barrels. Because of the pressure difference, the vacuum unit 1 extracts the residual gas and residual night in the iron barrels through the connected hoses. The residual gas has complex components, including acidic gases and VOC (volatile organic compounds).

[0046] The outlets of the three vacuum units 1 are respectively connected to the demister tower 2 through pipelines. The barrel exhaust gas passes through the demister tower 2 to absorb most of the exhaust gas.

[0047] The demister 2 and the rotary kiln 3 are connected by a pipeline. The reaction mechanism of the demister 2 is as follows: the sodium hydroxide spray liquid sprayed from the demister 2 reacts with the acid gas to generate inorganic salts and water, thereby absorbing the acid gas.

[0048] The unabsorbed waste gas will be driven by the induced draft fan 9 and transported to the incineration system for incineration to achieve complete harmless treatment, and the waste gas absorption liquid (inorganic salt and water) will also be transferred to the incineration system for treatment to achieve complete harmlessness. The incineration system includes a rotary kiln 3, a secondary combustion chamber 4, a waste heat boiler 5, a quenching tower 6, a dry deacidification tower 7, a bag filter 8, an induced draft fan 9, a precooler 10, a wet desulfurization tower 11 and a flue gas heater 12 which are interconnected.

[0049] The rotary kiln 3 and the secondary combustion chamber 4 are connected by a pipeline. In the rotary kiln 3, the inorganic components in the absorption liquid of the exhaust gas will generate slag; while the exhaust gas that is not absorbed does not generate slag, but is absorbed by the dry and wet deacidification tower. The rotary kiln 3 is a co-directional rotary kiln 3, that is, the direction of movement of the material in the body is the same as the direction of the flue gas flow. Solid, semi-solid waste, waste liquid and combustion-supporting air all enter from the head of the rotary kiln 3, and the flue gas and residue generated by combustion are discharged from the tail. The generated combustible gas and water vapor are pumped to the secondary combustion chamber 4 embedded with refractory materials, where hydrocarbons are further burned and decomposed.

[0050] The secondary combustion chamber 4 is connected to the waste heat boiler 5 through a pipeline. The flue gas of the secondary combustion chamber 4 is transported from the top to the waste heat boiler 5 by the conveyor and the induced draft fan 9; the temperature reaches 1130°C and is the remaining acid gas that has not been burned.

[0051] The waste heat boiler 5 and the quench tower 6 are connected by a pipeline. Adding urea to the waste heat boiler 5 can remove NO x The 500-600℃ substances are also the remaining acidic gases that have not been burned, which is equivalent to the first-stage deacidification. At this time, the waste heat boiler 5 absorbs part of the heat and drops to this temperature range.

[0052] The quenching tower 6 and the dry deacidification tower 7 are connected by pipelines. The main function of the quenching tower 6 is to quickly cool the incineration flue gas to less than 200° C. and achieve deacidification.

[0053] The dry deacidification tower 7 and the bag filter 8 are connected by a pipeline. The activated carbon powder inside the dry deacidification tower 7 adsorbs the remaining unburned acid gas in the flue gas.

[0054] The bag filter 8 and the precooler 10 are connected by a pipeline. The dust generated in the dry deacidification tower 7 is transported to the bag filter 8 for ash removal.

[0055] An induced draft fan 9 is provided on the pipeline between the bag filter 8 and the precooler 10. The precooler 10 cools the flue gas by water cooling.

[0056] The precooler 10 is connected to the wet flue gas desulfurization tower 11 through a pipeline; the wet flue gas desulfurization tower 11 is connected to the alkali solution circulation pool 13 through a pipeline; and the alkali solution circulation pool 13 is connected to the wastewater treatment workshop 14 through a pipeline.

[0057] The flue gas and the alkali solution undergo mass and heat transfer in the wet desulfurization tower 11, and the acidic gas in the flue gas reacts with the alkali solution to generate CaSO 3 、CaSO 3 、CaSO 4 , CaCl 2 , CaF 2 etc., making SO in flue gas 2 The removal rates of HCl and HF can reach more than 95%, which is equivalent to secondary deacidification. At the same time, the residual dust in the airflow can be removed to further reduce the dust content. After that, the flue gas leaves the bottom of the tower and enters the dry reactor.

[0058] The wet desulfurization tower 11 and the flue gas heater 12 are connected by a pipeline. The remaining flue gas is heated to 130°C by the flue gas heater 12 and then discharged through a 50m chimney.

[0059] After being processed by this incineration system, the unabsorbed waste gas and the absorbing liquid of the waste gas have been basically removed and can meet the emission standards.

[0060] The slag and ash produced by the rotary kiln 3, the secondary combustion chamber 4, the waste heat boiler 5 and the quench tower 6 are collected separately and put into the cement raw material production equipment.

[0061] The cement raw material production equipment includes a cement raw material production body 15, a batching chamber 16 and a grinding device.

[0062] A plurality of batching chambers 16 are fixedly provided on the two inner side walls of the cement raw material production body 15 from top to bottom. A grinding device is provided inside the cement raw material production body 15; the grinding device and the batching chamber 16 are not in contact. A raw material outlet pipe is provided at the bottom of the cement raw material production body 15; a solenoid valve is provided on the raw material outlet pipe.

[0063] Each batching chamber has a plurality of batching plates 17 arranged from top to bottom; a distribution chamber 18 is formed between every two adjacent batching plates 17. A discharge branch pipe 19 is connected to the front end of the batching chamber corresponding to the position of each distribution chamber 18; all the discharge branch pipes 19 are connected to the discharge main pipe 20; and a solenoid valve is arranged on each discharge branch pipe 19 (all solenoid valves are not shown in the figure). A feed pipe 21 is connected to the rear end of the batching chamber corresponding to the position of each distribution chamber 18.

[0064] The grinding device comprises a motor 28, an inner rotating shaft 22, an outer heat transfer rod 23, a grinding disc 24, a heat transfer block 25, a heating block 26 and a heat transfer disc 27. The inner rotating shaft 22 is made of a heat insulating material.

[0065] The motor 28 is fixedly arranged at the bottom end of the cement raw material production body 15; the output shaft of the motor 28 passes through the cement raw material production body 15 and is fixedly connected to the inner rotating shaft 22 inside the cement raw material production body 15; the outer side of the inner rotating shaft 22 is fixedly provided with an outer heat transfer rod 23.

[0066] A heating block 26 is fixedly disposed on the top of the outer heat transfer rod 23 . A plurality of grinding discs 24 are fixedly disposed on the outer side of the outer heat transfer rod 23 in a circumferential direction from top to bottom. Each grinding disc 24 is located between every two adjacent batching chambers 16 .

[0067] Each grinding disc 24 has an inner groove; the inner end of the inner groove is connected to the outer heat transfer rod 23; a heat transfer disc 27 is fixedly mounted inside each groove; the inner end of the heat transfer disc 27 is in contact with the outer heat transfer rod 23.

[0068] The upper end of each grinding disc 24 is provided with a plurality of heat transfer holes connected to the inner accommodating groove; the lower end of each grinding disc 24 is provided with a plurality of heat transfer holes connected to the inner accommodating groove. Heat transfer blocks 25 are matched and fixedly arranged in all heat transfer holes; all heat transfer blocks 25 and heat transfer discs 27 are fixedly connected; and all heat transfer blocks 25 are not in contact with the batching chamber 16.

[0069] The slag and ash produced by the incineration system have a high silicate content and can be used to make cement, thus realizing the recycling of waste from the incineration system.

[0070] The slag and ash produced by the rotary kiln 3, the secondary combustion chamber 4, the waste heat boiler 5 and the quenching tower 6 are collected and respectively put into the batching chamber 16 in the cement raw material production equipment.

[0071] The area of ​​the inner space of each distribution chamber 18 is the same, and the area of ​​the inner space of each distribution chamber 18 and the area of ​​the inner space of the cement raw material production body 15 form a certain ratio (here, the area of ​​the inner space of the cement raw material production body 158 is the area occupied by all the distribution chambers 16). Therefore, by adding slag and ash to the distribution chambers 18 at different positions and in different numbers, and adding cement to the inside of the cement raw material production body 15, the ratio of slag, ash and cement can be achieved. In the process of making cement, the ratio of slag and ash is the key.

[0072] The solenoid valve on each discharging branch pipe 19 controls the discharging of each distribution chamber 18 .

[0073] The heating block 26 not only stirs and mixes the slag, ash and cement, but also grinds the slag, ash and cement to ensure their fineness and uniformity, thereby improving the quality of the cement.

[0074] The moisture content of slag and ash should be less than 10%. The motor 28 drives the inner rotating shaft 22, the outer heat transfer rod 23, and the grinding disc 24 to rotate, and the grinding disc 24 drives the heat transfer block 25, the heating block 26, and the heat transfer disc 27 to rotate to achieve stirring, mixing, and grinding. When the heating block 26 is working, it transfers heat to the outer heat transfer rod 23, the heat transfer disc 27, and a plurality of heating blocks 26 in turn. During the rotation process, the plurality of heating blocks 26 heat the mixture of slag, ash, and cement to control the moisture content and temperature of the cement to ensure the quality of the cement.

[0075] Using ash to make cement can reduce environmental pollution and reduce production costs.

[0076] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A barrel waste gas incineration treatment system, characterized in that: It comprises a vacuum unit (1), a demisting tower (2), a rotary kiln (3), a secondary combustion chamber (4), a waste heat boiler (5), a quenching tower (6), a dry deacidification tower (7), a bag filter (8), an induced draft fan (9), a precooler (10), a wet desulfurization tower (11) and a flue gas heater (12); The inlets of the plurality of vacuum units (1) are respectively connected to the upper ends of the plurality of iron barrels through hoses; the outlets of the plurality of vacuum units (1) are respectively connected to the demisting tower (2) through pipelines; the demisting tower (2) and the rotary kiln (3) are connected through pipelines; the rotary kiln (3) and the secondary combustion chamber (4) are connected through pipelines; the secondary combustion chamber (4) and the waste heat boiler (5) are connected through pipelines; the waste heat boiler (5) and the quenching tower (6) are connected through pipelines; the quenching tower (6) ) and the dry deacidification tower (7) are connected by a pipeline; the dry deacidification tower (7) and the bag filter (8) are connected by a pipeline; the bag filter (8) and the precooler (10) are connected by a pipeline; an induced draft fan (9) is provided on the pipeline between the bag filter (8) and the precooler (10); the precooler (10) and the wet desulfurization tower (11) are connected by a pipeline; the wet desulfurization tower (11) and the flue gas heater (12) are connected by a pipeline; The slag and ash produced by the rotary kiln (3), the secondary combustion chamber (4), the waste heat boiler (5) and the quenching tower (6) are connected to cement raw material production equipment.

2. The barrel waste gas incineration treatment system according to claim 1 is characterized in that: The vacuum unit (1) has three units.

3. The barrel waste gas incineration treatment system according to claim 1 is characterized in that: The wet desulfurization tower (11) and the alkali solution circulation pool (13) are connected via a pipeline.

4. The system for incinerating waste gas from barrel opening according to claim 3 is characterized in that: The alkali solution circulation pool (13) and the wastewater treatment workshop (14) are connected via a pipeline.

5. According to the barrel waste gas incineration treatment system of claim 1, the cement raw material production equipment comprises a cement raw material production body (15), a batching chamber (16) and a grinding device; A plurality of batching chambers (16) are fixedly provided on the two inner side walls of the cement raw material production body (15) from top to bottom; a discharge port and a feed port are provided at the front and rear ends of each batching chamber (16); A grinding device is provided inside the cement raw material production body (15); the grinding device and the batching chamber (16) are not in contact; The bottom of the cement raw material production body (15) is connected to a raw material outlet pipe; a solenoid valve is provided on the raw material outlet pipe.

6. According to the barrel waste gas incineration treatment system of claim 5, a plurality of batching plates (17) are arranged inside each batching chamber from top to bottom; A material distribution chamber (18) is formed between every two adjacent material distribution plates (17); The front end of the batching chamber is connected to a position corresponding to each of the distribution chambers (18) and is provided with a discharge branch pipe (19); all the discharge branch pipes (19) are connected to the discharge main pipe (20); and each of the discharge branch pipes (19) is provided with a solenoid valve; A feed pipe (21) is provided at the rear end of the batching chamber corresponding to the position of each distribution chamber (18).

7. A barrel waste gas incineration treatment system according to claim 6, wherein the grinding device comprises a motor (28), an inner rotating shaft (22), an outer heat transfer rod (23), a grinding disc (24), a heat transfer block (25), a heating block (26) and a heat transfer disc (27); The motor (28) is fixedly arranged at the bottom end of the cement raw material production body (15); The output shaft of the motor (28) passes through the cement raw material production body (15) and is fixedly connected to the inner rotating shaft (22) inside the cement raw material production body (15); An outer heat transfer rod (23) is fixedly provided on the outer side of the inner rotating shaft (22); A heating block (26) is fixedly provided on the top end of the outer heat transfer rod (23); A plurality of grinding discs (24) are fixedly provided on the outer side of the outer heat transfer rod (23) in a circumferential direction from top to bottom; each of the grinding discs (24) is located between every two adjacent batching chambers (16); Each of the grinding discs (24) is provided with an inner accommodating groove; the inner end of the inner accommodating groove is connected to the outer heat transfer rod (23); The upper end of each grinding disc (24) is provided with a plurality of heat transfer holes connected to the inner accommodating groove; the lower end of each grinding disc (24) is provided with a plurality of heat transfer holes connected to the inner accommodating groove; A heat transfer plate (27) is fixedly mounted inside each of the accommodating grooves; the inner end of the heat transfer plate (27) is in contact with the outer heat transfer rod (23); Heat transfer blocks (25) are matched and fixedly arranged in all heat transfer holes; all heat transfer blocks (25) and the heat transfer plate (27) are fixedly connected; and all heat transfer blocks (25) are not in contact with the batching chamber (16).

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