Barrel opening waste gas incineration treatment system

Abstract

The utility model discloses a barrel opening waste gas incineration treatment system. Inlets of a plurality of vacuum units are respectively connected with the upper ends of a plurality of iron barrels through hoses; 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 utility model relates to waste gas treatment technical field especially relates to a kind of open barrel waste gas incineration treatment system. BACKGROUND

[0002] Reasonable recovery and treatment of toxic and harmful gas is the hot research direction and theme of current environmental governance. Since raw materials in food, material, electronic and other industries are basically used in iron barrels, the amount of iron barrels that need to be recycled and utilized every year is huge.

[0003] The volatile residual liquid in waste iron barrels and the gas in the barrels bring great difficulties to the recycling and utilization of waste iron barrels. Although the open barrel waste gas can be recycled and treated by spray tower at present, the main principle of the spray tower is that waste gas is fully contacted with liquid, and its solubility in water or chemical reaction is used to reduce its concentration, so as to become clean gas meeting national emission standards. In this process, the organic matter and inorganic matter in the recycled gas can not be well treated by partial reagent and alkaline cleaning process, and there is a risk of off-gas emission not meeting standards. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides an open barrel waste gas incineration treatment system, which harmlessly treats waste gas by incineration.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An open barrel waste gas incineration treatment system comprises 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-type dust collector, an induced draft fan, a pre-cooler, a wet desulfurization tower and a flue gas heater.

[0007] The inlets of the plurality of vacuum units are connected to the upper ends of the plurality of iron barrels through hoses respectively; the outlets of the plurality of vacuum units are connected to the demisting tower through pipelines respectively; the demisting tower is connected to the rotary kiln through a pipeline; the rotary kiln is connected to the secondary combustion chamber through a pipeline; the secondary combustion chamber is connected to the waste heat boiler through a pipeline; the waste heat boiler is connected to the quenching tower through a pipeline; the quenching tower is connected to the dry deacidification tower through a pipeline; the dry deacidification tower is connected to the bag-type dust collector through a pipeline; the bag-type dust collector is connected to the pre-cooler through a pipeline; an induced draft fan is arranged on the pipeline between the bag-type dust collector and the pre-cooler; the pre-cooler is connected to the wet desulfurization tower through a pipeline; and the wet desulfurization tower is connected to the flue gas heater through a pipeline.

[0008] Further, the vacuum unit has three.

[0009] Further, the wet desulfurization tower and the lye circulating pool are connected by a pipeline.

[0010] Further, the lye circulating pool and the wastewater treatment plant are connected by a pipeline.

[0011] Compared with the prior art, the open barrel waste gas incineration treatment system has the beneficial effects that:

[0012] (1) Safety: the open barrel waste gas incineration treatment system provided by the present application reduces the pressure of tail gas treatment from the source, avoids the process of gas treatment and emission, and the waste gas does not meet the standard;

[0013] (2) Harmless: the open barrel waste gas incineration treatment system provided by the present application collects waste gas for incineration treatment, which is less harmful than spray tower absorption or other treatment methods, and has higher removal efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The structure diagram of the open barrel waste gas incineration treatment system provided by the present application is shown.

[0015] In the figure: 1, vacuum unit; 2, demisting tower; 3, rotary kiln; 4, secondary combustion chamber; 5, waste heat boiler; 6, quenching tower; 7, dry deacidification tower; 8, bag-type dust collector; 9, induced draft fan; 10, pre-cooler; 11, wet desulfurization tower; 12, flue gas heater; 13, lye circulating pool; 14, wastewater treatment plant. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments.

[0017] In the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the purpose of facilitating the description of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0018] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "connection" should be understood broadly, for example, it can be fixed connection, also can be detachable connection, or integrally connected, it can be mechanical connection, also can be electrical connection, it can be direct connection, also can be indirectly connected through intermediate medium, for ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0019] Embodiment:

[0020] As Figure 1 The barrel opening waste gas incineration treatment system includes vacuum unit 1, mist eliminator 2, rotary kiln 3, two combustion chambers 4, waste heat boiler 5, quench tower 6, dry deacidification tower 7, bag-type dust collector 8, induced draft fan 9, pre-cooler 10, wet desulfurization tower 11 and flue gas heater 12.

[0021] The inlets of the three vacuum units 1 are respectively connected to the upper ends of the iron barrels through hoses. The iron barrels contain materials, electronic and other industry raw materials. The vacuum units 1 are used to extract air to form negative pressure in the iron barrels. Because of the pressure difference, the vacuum units 1 extract residual gas and residual night from the iron barrels through the connected hoses. The residual gas is complex, including acid gas and VOC (volatile organic compounds).

[0022] The outlets of the three vacuum units 1 are respectively connected to the mist eliminator 2 through pipelines. The barrel opening waste gas is absorbed by the mist eliminator 2 to remove most of the waste gas.

[0023] The mist eliminator 2 is connected to the rotary kiln 3 through a pipeline. The reaction mechanism of the mist eliminator 2 is that the sodium hydroxide spray liquid sprayed into the mist eliminator 2 reacts with the acid gas to generate inorganic salt and water, thereby absorbing the acid gas.

[0024] The unabsorbed waste gas is transported to the incineration system by the driving of the induced draft fan 9 for incineration to achieve harmless treatment. The absorption liquid (inorganic salt and water) of the waste gas is also sent to the incineration system for treatment to achieve complete harmless treatment. The incineration system includes the rotary kiln 3, the two combustion chambers 4, the waste heat boiler 5, the quench tower 6, the dry deacidification tower 7, the bag-type dust collector 8, the induced draft fan 9, the pre-cooler 10, the wet desulfurization tower 11 and the flue gas heater 12.

[0025] 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 waste gas form slag; and the waste gas not absorbed does not form slag and is absorbed by the dry-wet deacidification tower. The rotary kiln 3 is a co-rotating rotary kiln 3, that is, the direction of the movement of the materials in the body is the same as the flow direction of the flue gas. The solid, semi-solid waste, waste liquid and combustion-supporting air are all introduced from the head of the rotary kiln 3, and the flue gas and residues generated by combustion are discharged from the tail. The combustible gas and water vapor generated are pumped to the secondary combustion chamber 4 embedded with refractory material, where the hydrocarbons are further incinerated and decomposed.

[0026] The secondary combustion chamber 4 is connected with the waste heat boiler 5 by a pipeline. The flue gas of the secondary combustion chamber 4 is transported to the waste heat boiler 5 from the top by a conveyor driven by the induced draft fan 9; the temperature reaches 1130°C, which is the remaining unburned acid gas.

[0027] The waste heat boiler 5 is connected with the quench tower 6 by a pipeline. The addition of urea in the waste heat boiler 5 can convert NO x into harmless nitrogen and water vapor, reducing the emission of harmful gas. The substance at 500-600°C is also the remaining unburned acid gas, which is equivalent to primary deacidification. At this time, the waste heat boiler 5 absorbs part of the heat to reduce the temperature to this temperature range.

[0028] The quench tower 6 is connected with the dry deacidification tower 7 by a pipeline. The main function of the quench tower 6 is to rapidly cool the incineration flue gas to below 200°C and achieve deacidification.

[0029] The dry deacidification tower 7 is connected with the bag-type dust collector 8 by a pipeline. In the dry deacidification tower 7, the remaining unburned acid gas in the flue gas is adsorbed by activated carbon powder in the inside.

[0030] The bag-type dust collector 8 is connected with the pre-cooler 10 by a pipeline. The dust generated in the dry deacidification tower 7 is transported to the bag-type dust collector 8 for dust removal treatment.

[0031] An induced draft fan 9 is arranged on the pipeline between the bag-type dust collector 8 and the pre-cooler 10. The pre-cooler 10 cools the flue gas by water cooling.

[0032] The pre-cooler 10 is connected with the wet desulfurization tower 11 by a pipeline; the wet desulfurization tower 11 is connected with the alkali liquor circulating pool 13 by a pipeline, and the alkali liquor circulating pool 13 is connected with the wastewater treatment workshop 14 by a pipeline.

[0033] The flue gas exchanges mass and heat with the alkali liquor in the wet desulfurization tower 11, and the acid gas in the flue gas reacts with the alkali liquor to generate CaSO3, CaSO3, CaSO4, CaCl2, CaF2, etc., so that the removal rates of SO2, HCl and HF in the flue gas can all reach more than 95%, which is equivalent to secondary deacidification. At the same time, the residual dust in the gas flow can be removed, further reducing the dust content. After that, the flue gas leaves from the bottom of the tower and enters the dry reactor.

[0034] The wet desulfurization tower 11 and the flue gas heater 12 are connected by a pipeline.

[0035] After being treated by the incineration system, the waste gas and the absorption liquid of the waste gas that are not absorbed are basically completely removed and can be discharged up to the standard.

[0036] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A barrel waste gas incineration treatment system, characterized in that: It 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); The inlets of several vacuum units (1) are respectively connected to the upper ends of several iron barrels through hoses; the outlets of several 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 dust collector (8) are connected by a pipeline; the bag dust collector (8) and the precooler (10) are connected by a pipeline; an induced draft fan (9) is provided on the pipeline between the bag dust collector (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.

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 barrel waste gas incineration treatment system 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.

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