Waste liquid and waste gas integrated treatment system and method

Abstract

The invention relates to the technical field of industrial waste treatment, in particular to a waste liquid and waste gas integrated treatment system and method. The waste liquid and waste gas integrated treatment system comprises a vertical hazardous waste incinerator and a spraying absorption tower, the vertical hazardous waste incinerator comprises a vertical incinerator body, a waste liquid inlet, a waste gas inlet, a combustor and a waste gas outlet, the combustor is arranged on the side wall of the upper half portion of the vertical incinerator body, and the waste liquid inlet and the waste gas inlet are formed in the vertical incinerator body and arranged above the combustor. The waste gas outlet is formed in the side wall of the lower half part of the vertical furnace body. And a waste gas outlet of the vertical hazardous waste incinerator is connected with the spraying absorption tower. According to the waste liquid and waste gas integrated treatment system and method, the vertical furnace body is adopted, after high-concentration waste liquid and waste gas are pressurized and mixed with air, the mixture is sprayed into the furnace from the upper portion of the furnace body in a water mist and waste gas mixing mode and mixed with flames generated by a combustor on the upper middle portion of the furnace body for combustion in the falling process, and the waste liquid and the waste gas are discharged; the waste liquid and the waste gas can be subjected to harmless treatment at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste disposal, and in particular to a waste liquid and waste gas integrated disposal system and method. Background Art

[0002] The industrial waste generated in the current industrial production process mainly includes solid waste, waste gas and waste liquid. At present, waste gas is usually treated by the current mainstream waste gas treatment equipment such as TO and RTO equipment. Solid waste and waste liquid are mainly treated by incinerators.

[0003] TO furnace is a direct-fired waste gas treatment equipment, which uses the high temperature heat after fuel combustion to raise the temperature of organic waste gas to the reaction temperature and then oxidize and decompose it. RTO regenerative incinerator uses high temperature to oxidize organic waste gas into carbon dioxide and water. Waste gas treatment equipment is usually unable to treat solid waste and waste liquid.

[0004] Incinerators use coal, oil, gas and other fuels to burn and carbonize the objects to be treated at high temperatures to achieve the purpose of disinfection. However, incinerators are usually unable to treat waste gas.

[0005] At present, there is no ideal solution for the harmless treatment of waste gas and waste liquid at the same time.

[0006] Therefore, a new technology is urgently needed to realize the comprehensive treatment of waste gas and waste liquid. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, the present application provides an integrated waste liquid and waste gas treatment system and method. The integrated waste liquid and waste gas treatment system and method adopts a vertical furnace body, so that high-concentration waste liquid and waste gas are pressurized and mixed with air, and then sprayed into the furnace from the upper part of the furnace body in the form of a mixture of water mist and waste gas. During the falling process, it is mixed and burned with the flame generated by the burner in the middle and upper part of the furnace body, and the waste liquid and waste gas can be harmlessly treated at the same time.

[0008] In order to achieve the above-mentioned purpose, the present invention provides an integrated waste liquid and waste gas disposal system.

[0009] The waste liquid and waste gas integrated disposal system includes a vertical hazardous waste incinerator and a spray absorption tower. The vertical hazardous waste incinerator includes a vertical furnace body, a waste liquid inlet, a waste gas inlet, a burner and a waste gas outlet. The burner is arranged on the side wall of the upper half of the vertical furnace body, the waste liquid inlet and the waste gas inlet are arranged on the vertical furnace body and above the burner, and the waste gas outlet is arranged on the side wall of the lower half of the vertical furnace body. The waste gas outlet of the vertical hazardous waste incinerator is connected to the spray absorption tower.

[0010] Preferably, the integrated waste liquid and waste gas disposal system further includes a thermal oil heat exchanger and / or an air heat exchanger, and the thermal oil heat exchanger and / or the air heat exchanger are arranged between the waste gas outlet of the vertical hazardous waste incinerator and the spray absorption tower.

[0011] Preferably, the air inlet of the heat absorption pipe of the air heat exchanger is connected to the atmosphere, and the air outlet is connected to the exhaust gas inlet of the vertical hazardous waste incinerator.

[0012] Preferably, the integrated waste liquid and waste gas disposal system further includes a water pump, a waste liquid tank, a blower and a water seal tank; the waste liquid tank, the water pump and the waste liquid inlet of the vertical hazardous waste incinerator are connected in sequence; the water seal tank, the blower and the waste gas inlet of the vertical hazardous waste incinerator are connected in sequence.

[0013] Preferably, the integrated waste liquid and waste gas disposal system further includes a gas flow control valve and / or a liquid flow control valve, the gas flow control valve is arranged between the blower and the waste gas inlet of the vertical hazardous waste incinerator, and the liquid flow control valve is arranged between the water pump and the waste liquid inlet of the vertical hazardous waste incinerator.

[0014] Preferably, a reflux pipe is further provided between the outlet of the water pump and the waste liquid tank, and a reflux control valve is provided on the reflux pipe.

[0015] Preferably, the integrated waste liquid and waste gas disposal system further includes an air compressor and an air storage tank, and the air compressor, the air storage tank and the waste liquid inlet are connected in sequence.

[0016] Preferably, the distance between the burner and the top of the vertical furnace body is less than or equal to 1 / 3 of the total height of the vertical furnace body.

[0017] The invention also provides an integrated waste liquid and waste gas treatment method.

[0018] The method is used for any of the above-mentioned waste liquid and waste gas integrated disposal systems, and the method comprises the following steps:

[0019] The waste gas is transported into the vertical furnace body through the waste gas inlet of the vertical hazardous waste incinerator, and the waste liquid is transported into the vertical furnace body through the waste liquid inlet of the vertical hazardous waste incinerator.

[0020] The waste gas and waste liquid mixture in the vertical furnace body is ignited by the burner to cause combustion.

[0021] The waste gas after combustion is transported to the spray absorption tower through the waste gas outlet of the vertical hazardous waste incinerator, and the waste gas is further purified.

[0022] Preferably, the volume ratio of the waste liquid and the waste gas transported into the vertical furnace body is greater than or equal to 1:5.

[0023] Compared with the prior art, the present invention has the following advantages:

[0024] First, the vertical hazardous waste incinerator of the present invention uses a vertical furnace body to burn high-concentration waste liquid and waste gas in the furnace, and can simultaneously achieve harmless disposal of waste liquid and waste gas. Only when the vertical hazardous waste incinerator is started, an external heat source, such as natural gas, is required to provide heat. During stable operation, the heat released by the combustion of waste liquid and waste gas can be used to ensure the continuous reaction in the furnace, which significantly reduces the energy consumption required for waste liquid and waste gas treatment.

[0025] Secondly, the vertical hazardous waste incinerator involved in the present invention has a simple and compact structure and can be applied to various occasions requiring simultaneous treatment of waste liquid and waste gas, and has wide applicability.

[0026] Furthermore, the present invention realizes waste heat recovery of exhaust gas after combustion by providing a heat transfer oil heat exchanger and / or an air heat exchanger, thereby achieving full utilization of energy and being more energy-saving and environmentally friendly.

[0027] Moreover, the present invention also controls the volume ratio and / or flow ratio of waste liquid and waste gas by setting a gas flow control valve and / or a liquid flow control valve, so that the combustion of waste liquid and waste gas can be more complete. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The present application may be better understood by describing the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0029] Figure 1 A schematic diagram of a process flow of an integrated waste liquid and waste gas treatment system of the present application; and

[0030] Figure 2 For Figure 1 A schematic diagram of the main structure of the vertical hazardous waste incinerator in the embodiment shown.

[0031] Description of Figure Numbers:

[0032] 100. Vertical hazardous waste incinerator; 102. Vertical furnace body; 104. Waste liquid inlet; 106. Waste gas inlet; 108. Burner; 110. Waste gas outlet; 112. Flame arrester; 114. Waste liquid nozzle; 116. Waste residue outlet; 200. Spray absorption tower; 300. Thermal oil heat exchanger; 400. Air heat exchanger; 500. Water pump; 502. Waste liquid tank; 504. Reflux pipe; 600. Blower; 602. Water seal tank; 700. Air compressor; 702. Air storage tank. DETAILED DESCRIPTION

[0033] Unless otherwise defined, technical or scientific terms used in the present specification and claims shall have the common meanings understood by persons having ordinary skills in the technical field to which the present invention belongs.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying 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 operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] This embodiment relates to an integrated waste liquid and waste gas disposal system as shown in Figure 1.

[0039] The integrated waste liquid and waste gas treatment system includes: Figure 2 The vertical hazardous waste incinerator 100 and the spray absorption tower 200 shown in the figure include a vertical hazardous waste incinerator 100, a vertical furnace body 102, a waste liquid inlet 104, a waste gas inlet 106, a burner 108 and a waste gas outlet 110, the burner 108 is arranged on the side wall of the upper half of the vertical furnace body 102, the waste liquid inlet 104 and the waste gas inlet 106 are arranged on the vertical furnace body 102, and are arranged above the burner 108, and the waste gas outlet 110 is arranged on the side wall of the lower half of the vertical furnace body 102. The waste gas outlet 110 of the vertical hazardous waste incinerator 100 is connected to the spray absorption tower 200.

[0040] The operation method of the integrated waste liquid and waste gas treatment system is:

[0041] The waste gas is transported to the vertical furnace body 102 through the waste gas inlet 106 of the vertical hazardous waste incinerator 100, and the waste liquid is transported to the vertical furnace body 102 through the waste liquid inlet 104 of the vertical hazardous waste incinerator 100. Preferably, the waste liquid transported to the vertical furnace body 102 may be a high-concentration waste liquid, and its COD is above 100,000. The waste gas transported to the vertical furnace body 102 may be a high-concentration waste gas, and its VOC is above 10,000. In some embodiments, the volume ratio of the waste liquid and the waste gas transported to the vertical furnace body 102 is greater than or equal to 1:5.

[0042] The waste gas and waste liquid mixture in the vertical furnace body 102 is ignited by the burner 108 to burn. In some embodiments, the pressure, temperature and / or air volume in the vertical furnace body 102 can be detected. When the combustion conditions remain unchanged, the negative pressure decreases, and the temperature increases, the vertical hazardous waste incinerator 100 achieves stable combustion. At this time, the fire volume of the burner 108 can be reduced until the heating flame is extinguished.

[0043] The waste gas after combustion is transported to the spray absorption tower 200 through the waste gas outlet 110 of the vertical hazardous waste incinerator 100, and the waste gas is further purified.

[0044] The waste liquid and waste gas integrated treatment system in this embodiment optimizes the structure of the hazardous waste incinerator and adopts a vertical hazardous waste incinerator 100. External high-concentration waste liquid and waste gas enter the furnace body together and are ignited by the burner 108, thereby achieving synchronous harmless treatment of waste liquid and waste gas.

[0045] In some embodiments, the integrated waste liquid and waste gas treatment system further includes a thermal oil heat exchanger 300 and / or an air heat exchanger 400, which is disposed between the waste gas outlet 110 of the vertical hazardous waste incinerator 100 and the spray absorption tower 200. The air inlet of the heat absorption pipe of the air heat exchanger 400 can be connected to the atmosphere, and the air outlet can be connected to the waste gas inlet 106 of the vertical hazardous waste incinerator 100.

[0046] By providing a thermal oil heat exchanger 300 and / or an air heat exchanger 400, the heat in the high-temperature oxidation tail gas can be fully utilized and can be used for reproduction or heating. In this embodiment, the high-temperature oxidation tail gas first passes through the thermal oil heat exchanger 300 and releases heat, and the thermal oil heat exchanger 300 absorbs the heat energy of the high-temperature oxidation tail gas and can be used for reproduction. Subsequently, the high-temperature oxidation tail gas passes through the air heat exchanger 400 and releases heat, and the external air absorbs the heat and is transported to the vertical hazardous waste incinerator 100 together with the waste gas. In this way, the vertical hazardous waste incinerator 100 can burn more fully and consume less energy.

[0047] In some embodiments, the integrated waste liquid and waste gas treatment system further includes a water pump 500, a waste liquid tank 502, a blower 600 and a water seal tank 602, the waste liquid tank 502, the water pump 500 and the waste liquid inlet 104 of the vertical hazardous waste incinerator 100 are connected in sequence, and the water seal tank 602, the blower 600 and the waste gas inlet 106 of the vertical hazardous waste incinerator 100 are connected in sequence. In this embodiment, the wastewater first enters the waste liquid tank 502, and then enters the vertical hazardous waste incinerator 100 through the water pump 500. The wastewater first enters the water seal tank 602, and then enters the vertical hazardous waste incinerator 100 through the blower 600.

[0048] In some embodiments, the integrated waste liquid and waste gas disposal system further includes a gas flow control valve and / or a liquid flow control valve, the gas flow control valve is disposed between the blower 600 and the waste gas inlet 106 of the vertical hazardous waste incinerator 100, and the liquid flow control valve is disposed between the water pump 500 and the waste liquid inlet 104 of the vertical hazardous waste incinerator 100. The gas flow control valve and / or the liquid flow control valve can be used to control the volume ratio and flow ratio of the waste liquid and waste gas delivered to the vertical furnace body 102, so that the ratio of the waste liquid and the waste gas is more reasonable and controllable.

[0049] In some embodiments, a reflux pipe 504 is further provided between the outlet of the water pump 500 and the waste liquid tank 502 , and a reflux control valve is provided on the reflux pipe 504 .

[0050] In some embodiments, the integrated waste liquid and waste gas treatment system further includes an air compressor 700 and an air storage tank 702, which are connected in sequence to the waste liquid inlet 104. The air compressor 700 and the air storage tank 702 can be used to mix the external atmosphere with the waste liquid, so that the waste liquid becomes mist, which is more conducive to complete combustion.

[0051] Combine the following Figure 2 At once Figure 1 The structure of the vertical hazardous waste incinerator 100 in the illustrated embodiment is further described.

[0052] The vertical furnace body 102 of the vertical hazardous waste incinerator 100 may be a circular or elliptical furnace body.

[0053] In some embodiments, the distance between the burner 108 and the top of the vertical furnace 102 is less than or equal to 1 / 3 of the total height of the vertical furnace 102. The distance between the exhaust gas outlet 110 and the bottom of the vertical furnace 102 may be less than or equal to 1 / 4 of the total height of the vertical furnace 102.

[0054] In some embodiments, a waste liquid nozzle 114 and / or a waste gas nozzle are disposed in the vertical furnace body 102, the waste liquid nozzle 114 is connected to the waste liquid inlet 104, and the waste gas nozzle is connected to the waste gas inlet 106. The waste liquid nozzle 114 and / or the waste gas nozzle can be disposed near the center of the vertical furnace body 102. In some embodiments, the waste liquid nozzle 114 and / or the waste gas nozzle can be disposed at the center of the top of the vertical furnace body 102 or at one side biased toward the burner 108. A flame arrester 112 can be further disposed at the waste gas nozzle.

[0055] By arranging the burner 108 and the waste liquid nozzle 114 and / or the waste gas nozzle at the upper part of the vertical furnace body 102, the waste gas and waste liquid can have enough distance and time to be fully burned while falling in the furnace, so that the harmless treatment effect of the waste liquid and waste gas is better. The waste gas outlet 110 is arranged at the lower part of the vertical furnace body 102, so that the waste gas and waste liquid can have enough distance and time to be fully burned while falling in the furnace. The flame arrester 112 can be used to prevent the flame of flammable gas and flammable liquid vapor from spreading, so that the combustion reaction is controlled inside the vertical hazardous waste incinerator 100.

[0056] After the waste liquid and waste gas are fully burned, the remaining part is mainly gas, but some residue may still remain. In order to ensure the service life of the vertical hazardous waste incinerator 100, in some embodiments, the vertical hazardous waste incinerator 100 further includes a waste residue outlet 116, which is arranged on the side wall of the lower half of the vertical furnace body 102. The distance between the waste residue outlet 116 and the bottom of the vertical furnace body 102 can be less than the distance between the waste gas outlet 110 and the bottom of the vertical furnace body 102. The waste residue outlet 116 can be provided with a door that can be opened and closed.

[0057] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste liquid and waste gas integrated treatment system, characterized in that: The integrated waste liquid and waste gas disposal system includes a vertical hazardous waste incinerator and a spray absorption tower. The vertical hazardous waste incinerator includes a vertical furnace body, a waste liquid inlet, a waste gas inlet, a burner and a waste gas outlet. The burner is arranged on the side wall of the upper half of the vertical furnace body, the waste liquid inlet and the waste gas inlet are arranged on the vertical furnace body and above the burner, and the waste gas outlet is arranged on the side wall of the lower half of the vertical furnace body; the waste gas outlet of the vertical hazardous waste incinerator is connected to the spray absorption tower.

2. The integrated waste liquid and waste gas treatment system according to claim 1 is characterized in that: The integrated waste liquid and waste gas treatment system further includes a thermal oil heat exchanger and / or an air heat exchanger, and the thermal oil heat exchanger and / or the air heat exchanger are arranged between the waste gas outlet of the vertical hazardous waste incinerator and the spray absorption tower.

3. The integrated waste liquid and waste gas treatment system according to claim 2 is characterized in that: The air inlet of the heat absorption pipe of the air heat exchanger is connected to the atmosphere, and the air outlet is connected to the waste gas inlet of the vertical hazardous waste incinerator.

4. The integrated waste liquid and waste gas treatment system according to claim 1 is characterized in that: The integrated waste liquid and waste gas disposal system further includes a water pump, a waste liquid tank, a blower and a water seal tank. The waste liquid tank, the water pump and the waste liquid inlet of the vertical hazardous waste incinerator are connected in sequence, and the water seal tank, the blower and the waste gas inlet of the vertical hazardous waste incinerator are connected in sequence.

5. The integrated waste liquid and waste gas treatment system according to claim 4 is characterized in that: The integrated waste liquid and waste gas disposal system further includes a gas flow control valve and / or a liquid flow control valve. The gas flow control valve is arranged between the blower and the waste gas inlet of the vertical hazardous waste incinerator, and the liquid flow control valve is arranged between the water pump and the waste liquid inlet of the vertical hazardous waste incinerator.

6. The integrated waste liquid and waste gas treatment system according to claim 4 is characterized in that: A reflux pipeline is further arranged between the outlet of the water pump and the waste liquid tank, and a reflux control valve is arranged on the reflux pipeline.

7. The integrated waste liquid and waste gas treatment system according to claim 1 is characterized in that: The integrated waste liquid and waste gas disposal system further includes an air compressor and an air storage tank, and the air compressor, the air storage tank and the waste liquid inlet are connected in sequence.

8. The integrated waste liquid and waste gas treatment system according to claim 1 is characterized in that: The distance between the burner and the top of the vertical furnace body is less than or equal to 1 / 3 of the total height of the vertical furnace body.

9. A method for integrated treatment of waste liquid and waste gas, characterized in that: The method is used for the integrated waste liquid and waste gas treatment system as claimed in any one of claims 1 to 8, and the method comprises the following steps: The waste gas is transported into the vertical furnace body through the waste gas inlet of the vertical hazardous waste incinerator, and the waste liquid is transported into the vertical furnace body through the waste liquid inlet of the vertical hazardous waste incinerator; The waste gas and waste liquid mixture in the vertical furnace body is ignited by a burner to make it burn; The waste gas after combustion is transported to the spray absorption tower through the waste gas outlet of the vertical hazardous waste incinerator, and the waste gas is further purified.

10. The integrated waste liquid and waste gas treatment method according to claim 9, characterized in that: The volume ratio of the waste liquid and waste gas transported into the vertical furnace body is greater than or equal to 1:5.

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