CN110563235A - Liquid tank truck evaporation and washing tank body waste water-waste gas combined treatment equipment and process - Google Patents
Liquid tank truck evaporation and washing tank body waste water-waste gas combined treatment equipment and process Download PDFInfo
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- CN110563235A CN110563235A CN201910843397.3A CN201910843397A CN110563235A CN 110563235 A CN110563235 A CN 110563235A CN 201910843397 A CN201910843397 A CN 201910843397A CN 110563235 A CN110563235 A CN 110563235A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
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- General Engineering & Computer Science (AREA)
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- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention relates to a waste water-waste gas combined treatment device and a process for a steam washing tank body of a liquid tank truck. The technical scheme is as follows: the parts functionally form a waste gas collecting part, an organic liquid collecting part, a waste water atomization and spray burning part, an oxidation heat extracting and utilizing part, an oxidation device main body part and a safety protection part, wherein the parts are formed by connecting pipelines and accessories. The beneficial effects are as follows: 1, the environment-friendly effect is thorough: gasifying part of organic wastewater, homogenizing and mixing the gasified organic wastewater with organic waste gas and air, and oxidizing the mixed gas in a high-temperature oxidation bed to convert organic substances into harmless substances; 2. the operation is safe and reliable: the method adopts a mode of combining premixed combustion and diffusion combustion to treat oil organic matters in the wastewater and the waste gas. 3. Good running economy: organic matter energy in waste water and waste gas is utilized, and equipment operation cost is reduced; 4. application modes are diversified: the method can be used for treating the wastewater and the waste gas jointly and can also be used for treating the wastewater and the waste gas independently.
Description
Technical Field
The invention relates to an environment protection process and equipment, in particular to a waste water-waste gas combined treatment device and process for a steam washing tank body of a liquid tank truck.
background
the method comprises the following steps that along with the development of the petrochemical industry, the oil product transportation industry is expanded continuously, large transport vehicles engaged in crude oil, coal tar and finished oil are increased continuously, tank trucks occupy an important position in transportation and account for about 18% of the total number of the tank trucks, about more than 200 million of the tank trucks exist in the country as in 2017, liquid tank trucks are required to steam and wash the interior of a tank body when different types or different types of articles are transported, more and more people provide steam and wash tank service, a large market is formed at present, hundreds of tank trucks exist in the country, only more than 50 tank trucks exist in Shandong, one tank truck is steamed and washed to generate about 100kg of organic wastewater and discharge volatile organic waste gas along with the volatile organic waste gas, each tank truck is steamed and washed once a week, the condition that 2-3 million tons of organic wastewater are formed by steaming and washing tank trucks every day is estimated, the waste gas discharged by the conventional water washing-oxidizing (hydrogen peroxide or photolysis) -activated carbon adsorption process is generally adopted as a 'water washing-spraying-oxidizing (hydrogen peroxide or photolysis) -activated carbon adsorption' process, the wastewater is a wastewater treatment process, the wastewater is still a wastewater treatment process which is carried out by the air flotation-oil removal-separation-atmospheric anaerobic treatment industry, the wastewater is a biological process, the wastewater treatment process is a wastewater treatment process, the wastewater treatment process of the wastewater of the national standards, the national standards of the national standards, the wastewater of the national standards of the wastewater of the national standards of the national wastewater of the.
disclosure of Invention
the invention aims to provide a waste water-waste gas combined treatment device and a waste gas combined treatment process for a steaming and washing tank body of a liquid tank truck, aiming at the defects in the prior art, the organic waste water and organic substances in the organic waste gas generated by steaming and washing the tank body are taken as energy, and the organic waste water and the organic waste gas are jointly treated by adopting a steam recycling high temperature thermal oxidation (VRTO) process, so that the defects in the traditional mode are overcome, the purposes of recycling waste, saving energy and reducing the operation cost are realized.
The invention provides a waste water-waste gas combined treatment device for a steaming and washing tank body of a liquid tank truck, which adopts the technical scheme that: mainly comprises a tank car waste gas collecting cover (1), an organic liquid pool (3), an oil skimming machine (4), an organic waste water pool (5), a waste water output pump (7), a high-pressure spray burning pump (9), a distillation tank (12), a steam-water separator (16), a high-temperature water circulating pump (18), an oxidation device reversing valve (20), an oxidation device heat exchanger (21), an oxidation device heat accumulation oxidation chamber (22), an oxidation device exhaust chimney (23), a burner, an atomizing spray gun, an air compressor (29), a main fan (30), an air blender (31) and a fire retardant waterfall draining device (33), wherein the tank car waste gas collecting cover (1), the organic waste water pool (5) and the distillation tank (12) are connected through pipelines to form a tank car waste gas, an organic waste water pool waste gas and a distillation tank waste gas collecting part, and the organic waste gas is converged and then enters the oxidation device heat accumulation oxidation chamber (22) to oxidize organic, wherein each steam washing tank car position is provided with at least one tank car waste gas collecting cover (1); the organic liquid pool (3), the oil skimming machine (4), the organic waste water pool (5) and the distillation retort oil drain valve (11) are connected through pipelines to form an organic liquid collecting part; a waste water output pump (7), a high-pressure spray burning pump (9), one or more groups of atomizing spray guns, an air compressor (29) and one or more groups of burners are connected through pipelines to form an organic waste water atomizing spray burning part; the distillation tank (12), the steam-water separator (16), the high-temperature water circulating pump (18) and the oxidation device heat exchanger (21) are connected through pipelines to form an oxidation heat extraction and utilization part; the oxidation device reversing valve (20), the oxidation device heat exchanger (21) and the oxidation device heat accumulation oxidation chamber (22) are sequentially connected and installed from bottom to top to form the oxidation device main body part; the organic gas concentration sensor (28), the main fan (30), the air blender (31), the safety protection valve (32) and the fire-retardant waterfall discharging device (33) are sequentially connected to form a safety protection part.
preferably, the upper part of each steaming and washing tank vehicle is provided with at least one tank vehicle waste gas collecting cover (1), each tank vehicle waste gas collecting cover (1) is gathered together through a pipeline and is connected to the upper part of the organic waste water tank (5) and the upper part of the distillation tank (12), and after the three groups of pipelines are gathered, the mixture enters the oxidation device through a fire-retardant waterfall draining device (33), an air mixer (31) and a main fan (30).
Preferably, an oil skimming machine (4) is arranged on the upper side of the organic matter wastewater pool (5), and an organic liquid pool (3) is arranged on one side of the organic matter wastewater pool (5); the bottom of the distillation retort (12) is provided with a distillation retort oil drain valve (11), and the distillation retort oil drain valve (11) is connected to the organic liquid pool (3) through a pipeline.
Preferably, the outlet end of the organic wastewater pool (5) is connected to the inlet end of the distillation tank (12) through a pipeline and a wastewater output pump (7), the outlet end of the distillation tank (12) is connected to the right atomization spray gun (25) and the left atomization spray gun (26) through a pipeline and a high-pressure burner pump (9), and an air compressor (29) is connected to the right atomization spray gun (25) and the left atomization spray gun (26) through pipelines.
Preferably, the outlet end of the oxidation device heat exchanger (21) is connected to the inlet end of the steam-water separator (16) through a pipeline, the upper outlet of the steam-water separator (16) is connected to a steam-washing tank car through a pipeline, the lower outlet of the steam-water separator (16) is connected to the distillation tank (12) through a pipeline and a high-temperature water circulating pump (18), high-temperature gas enters the steam-water separator (16) through the oxidation device heat exchanger (21), the gas is sent to the steam-washing tank car for use, one part of liquid directly returns to the oxidation device heat exchanger (21), the other part of liquid is sent to the distillation tank (12) through the high-temperature water circulating pump (18) and the distillation tank saturated water inlet valve (13) for use, and the liquid after being cooled in the distillation tank (12) returns to the steam-water separator (16) through the.
Preferably, the upper part of the oxidation device heat accumulation oxidation chamber (22) is provided with a right atomization spray gun (25) and a left atomization spray gun (26), the two sides of the oxidation device heat accumulation oxidation chamber (22) are respectively provided with a right burner (24) and a left burner (27), an oxidation device heat exchanger (21) is arranged below the oxidation device heat accumulation oxidation chamber (22), and an oxidation device reversing valve (20) is arranged below the oxidation device heat exchanger (21).
preferably, an organic gas concentration sensor (28) and a main fan (30) are installed at the inlet end of the reversing valve (20) of the oxidation device, an air inlet of the main fan (30) is connected with a fire retardant waterfall draining device (33) through an air blender (31) and a safety protection valve (32), and a fire retardant waterfall draining device liquid return valve (34) is arranged at the lower part of the fire retardant waterfall draining device (33).
the invention relates to a waste water-waste gas combined treatment process for a steam washing tank body of a liquid tank truck, which adopts the technical scheme that the process comprises the following steps:
firstly, when a tank body needs to be steamed and washed, a gasification device is started firstly: opening an air valve on an air blender (31), starting a right burner (24) and a left burner (27) by using auxiliary fuel, preheating a heat storage oxidation chamber (22) of the oxidation device, simultaneously starting a main fan (30), a reversing valve (20) of the oxidation device and an air compressor (29), and entering a normal operation stage after the temperature in the heat storage gasification chamber (22) of the oxidation device reaches a normal operation temperature;
secondly, opening a safety protection valve (32), properly closing or closing an air valve on an air blender (31), opening a high-temperature water circulating pump (18), sending waste gas discharged by the steam tank into a heat storage oxidation chamber (22) of an oxidation device by a main fan (30), and simultaneously starting a waste water output pump (7) to close and send waste water in an organic waste water pool (5) into the distillation tank (12); starting a high-pressure jet burning pump (9) to spray the waste atomized water into a heat storage gasification chamber (22) of the gasification device; organic substances in the waste gas and the atomized waste water are oxidized or combusted in a heat storage oxidation chamber (22) of the oxidation device, the released heat flows downwards along with the wind flow through a heat exchanger (21) of the oxidation device and is taken out by a high-temperature water circulating pump (18), steam-water separation is carried out in a steam-water separator (16) to generate steam, and the steam is sent to a tank body of a steaming and washing tank car through a pipeline; the other part of heat in the steam-water separator (16) can be shunted to a heat exchanger in the distillation retort (12), water and low-boiling-point organic matters in the wastewater are distilled out under the condition of micro negative pressure in the distillation retort (12), and then the distilled water, the waste gas in the tank body of the tank car and the waste gas at the top of the organic matter wastewater tank (5) are sent into a heat-storage oxidation chamber (22) of an oxidation device for high-temperature oxidation treatment by a main fan (30); the concentrated and pure oil organic matters at the bottom of the distillation tank (12) are separated and recycled to the organic liquid pool (3) and are used as the fuel of a burner for equipment operation or other purposes;
Thirdly, in the waste gas flow, waste water separated out in the fire-retardant waterfall device (33) and the reversing valve (20) of the oxidation device respectively flows back into the organic waste water tank (5) through a liquid return valve (34) of the fire-retardant waterfall device and a liquid return valve (19) of the oxidation device; according to actual working requirements, the treatment and utilization quantity of waste water, waste gas and water vapor can be adapted by adjusting a main fan (30), a high-pressure jet burning pump (9), a distillation tank saturated water inlet valve (13) and a distillation tank saturated water outlet valve (14);
Fourthly, when the machine is shut down, firstly, the fuel of the right combustor (24) and the fuel of the left combustor (27) are closed, and then the high-pressure jet combustion pump (9) is closed; when the pressure in the steam-water separator (16) is less than 10kPa or the temperature is less than 100 ℃, finally closing the main fan (30), the safety protection valve (32) and the high-temperature water circulating pump (18) in sequence; and after the air channels and the air compressor (29) of the right combustor (24) and the left combustor (27) are continuously maintained for a period of time, the air channels and the air compressor are closed together with other circuits and air channel equipment.
Preferably, the invention also comprises the following safety protection measures:
The method comprises the following steps of (I) controlling the rotating speed of a main fan (30) by taking a signal of an organic gas concentration sensor (28) as a source signal to ensure that the concentration of waste gas entering a heat storage oxidation chamber (22) of an oxidation device is in a set concentration range; under the condition of a certain rotating speed, the temperature of the inner cavity of the heat accumulation oxidation chamber (22) of the oxidation device and the temperature value of the heat accumulator are used as source signals for controlling and adjusting the reversing time of a reversing valve (20) of the oxidation device, the waste water atomization spraying amount of a right atomization spray gun (25) and a left atomization spray gun (26), and the work loads of a right combustor (24) and a left combustor (27);
and secondly, when the liquid level of the steam-water separator (16) is low, the high-temperature water circulating pump (18) is stopped due to a fault, the liquid level of the distillation tank (12) is low, and the temperature of the inner cavity of the heat storage oxidation chamber (22) of the oxidation device is ultrahigh and out of control, the alarm is linked, the main fan (30) is stopped, and the safety protection valve (32) is closed within 1.5 seconds.
Compared with the prior art, the invention has the beneficial effects that:
1. the environmental protection effect is thorough: part of organic wastewater is vaporized and is uniformly mixed with organic waste gas and air, and the mixed gas is uniformly oxidized in a high-temperature oxidation bed at about 1000 ℃, so that organic substances are converted into CO2、H2harmless substances such as O and the like; for example, substances containing partial chlorine, benzene and other elements in the wastewater and the waste gas pass through a quenching heat exchanger in the oxidation device, so that secondary generation of dioxin in the oxidation exhaust process is avoided;
2. The operation is safe and reliable: adopts a mode of combining premixed combustion (oxidation) and diffusion combustion (oxidation) to treat oil organic matters in the wastewater and the waste gas. The oil skimmer and the distillation tank are used for separating relatively pure oil organic matters to provide fuel for the combustor, and the diffusion type combustion mode is adopted, so that the combustion is safe and reliable; the method comprises the steps of pre-mixing and oxidizing waste gas or air by distilling out low-boiling-point organic matters in the waste water, and monitoring the concentration of mixed gas in a reasonable range by an online organic gas concentration sensor to ensure the safe oxidation of the premixed gas; the higher boiling organic matter dissolved in the wastewater is treated safely in a heat-storage oxidation chamber of an oxidation device by adopting an atomization spray burning mode, namely a mixing mode of diffusion burning and pre-burning;
3. Good running economy: the waste water and the organic matters in the waste gas are oxidized at high temperature or (and) combusted to generate heat which is used for distilling the waste water, waste water steam and low-boiling-point organic matters heat the waste gas and (or) air and then flow back to the high-temperature oxidation bed to recycle the energy, and the heat generated by oxidation is absorbed by the heat exchanger along with the exhaust gas and is used for distilling the waste water and (or) generating water steam. Therefore, the organic matter energy in the waste water and the waste gas is utilized while the waste water and the waste gas are treated, and the running cost of the equipment is reduced;
4. Application modes are diversified: the method can be used for treating the wastewater and the waste gas jointly and can also be used for treating the wastewater and the waste gas independently. The waste water treatment has two ways, one is to distill the waste water by using the heat of oxidation or (and) combustion, and oxidize organic matters in a heat storage oxidation chamber together with waste gas; secondly, the atomized waste water is sprayed and burned in a heat storage oxidation chamber. The two can be used simultaneously or individually. Meanwhile, water vapor can be prepared and used for steaming and washing the tank body of the tank car, and the steam yield and the wastewater treatment capacity can be adjusted according to actual working conditions.
drawings
FIG. 1 is a schematic flow diagram of the process and apparatus of the present invention;
In the upper diagram: a tank truck waste gas collecting cover 1, a tank truck steam valve 2, an organic liquid pool 3, an oil skimmer 4, an organic wastewater pool 5, a wastewater output pump pre-filter 6, a wastewater output pump 7, a high-pressure jet burning pump post-filter 8, a high-pressure jet burning pump 9, a distillation tank check valve 10, a distillation tank, a water tank,
A distillation tank oil drain valve 11, a distillation tank 12, a distillation tank saturated water inlet valve 13, a distillation tank saturated water outlet valve 14, a steam-water separator check valve 15, a steam-water separator 16, a steam-water separator steam valve 17, a high-temperature water circulating pump 18, an oxidation device liquid return valve 19, an adjusting oxidation device reversing valve 20, an oxidation device heat exchanger 21, an oxidation device heat accumulation oxidation chamber 22, an oxidation device exhaust chimney 23, a steam-water separator saturated water outlet valve, a steam-water separator steam valve 17, a high-temperature water circulating pump 18, an,
The system comprises a right burner 24, a right atomizing spray gun 25, a left atomizing spray gun 26, a left burner 27, an organic gas concentration sensor 28, an air compressor 29, a main fan 30, an air blender 31, a safety protection valve 32, a fire retardant waterfall device 33 and a fire retardant waterfall device liquid return valve 34.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment 1 discloses a waste water-waste gas combined treatment device for a steaming and washing tank body of a liquid tank truck, which adopts the technical scheme that: mainly comprises a tank car waste gas collecting cover 1, an organic liquid pool 3, an oil skimming machine 4, an organic matter wastewater pool 5, a wastewater output pump 7, a high-pressure spray burning pump 9, a distillation tank 12, a steam-water separator 16, a high-temperature water circulating pump 18, an oxidation device reversing valve 20, an oxidation device heat exchanger 21, an oxidation device heat accumulation oxidation chamber 22, an oxidation device exhaust chimney 23, a right burner 24, a right atomization spray gun 25, a left atomization spray gun 26, a left burner 27, an air compressor 29, a main fan 30, an air blender 31 and a fire retardant waterfall discharging device 33, the tank car waste gas collecting cover 1, the organic matter wastewater pool 5 and the distillation tank 12 are connected through pipelines to form a part for collecting waste gas in the tank car, waste gas in the organic matter wastewater pool and waste gas in the distillation tank, the organic waste gas is converged and then enters the oxidation device heat accumulation oxidation chamber 22 to oxidize organic matters, wherein at least one tank car waste gas collecting cover 1 is arranged at each tank car position of the steaming and washing tank; the organic liquid pool 3, the oil skimming machine 4, the organic wastewater pool 5 and the distillation retort oil drain valve 11 are connected through pipelines to form an organic liquid collecting part; the waste water output pump 7, the high-pressure spray burning pump 9, the two groups of atomizing spray guns, the air compressor 29 and the two groups of burners are connected through pipelines to form an organic waste water atomizing spray burning part; the distillation tank 12, the steam-water separator 16, the high-temperature water circulating pump 18 and the oxidation device heat exchanger 21 are connected through pipelines to form an oxidation heat extraction and utilization part; the oxidation device reversing valve 20, the oxidation device heat exchanger 21 and the oxidation device heat accumulation oxidation chamber 22 are sequentially connected and installed from bottom to top to form the main body part of the oxidation device; the organic gas concentration sensor 28, the main fan 30, the air blender 31, the safety protection valve 32 and the fire-retardant waterfall discharging device 33 are connected in sequence to form a safety protection part.
At least one tank truck waste gas collecting cover 1 is arranged on the upper portion of each steaming and washing tank truck, the tank truck waste gas collecting covers 1 are gathered together through pipelines and are connected to the upper portion of the organic matter wastewater pond 5 and the upper portion of the distillation tank 12, and after the three pipelines are gathered, the mixture enters the oxidation device through a fire-retardant waterfall draining device 33, an air mixer 31 and a main fan 30.
an oil skimming machine 4 is arranged on the upper side of the organic matter wastewater pool 5, and an organic liquid pool 3 is arranged on one side of the organic matter wastewater pool 5; the bottom of the distillation retort 12 is provided with a distillation retort oil drain valve 11, the distillation retort oil drain valve 11 is connected to the organic liquid pool 3 through a pipeline, and organic liquid such as oil products and the like are contained in the organic liquid pool 3.
the outlet end of the organic waste water pool 5 is connected to the inlet end of the distillation retort 12 through a pipeline and a waste water output pump 7, the outlet end of the distillation retort 12 is connected to the right atomizing spray gun 25 and the left atomizing spray gun 26 through a pipeline and a high-pressure spray combustion pump 9, the air compressor 29 is connected to the right atomizing spray gun 25 and the left atomizing spray gun 26 through pipelines, and organic waste water such as oil products is contained in the organic waste water pool 5.
The outlet end of the oxidation device heat exchanger 21 is connected to the inlet end of the steam-water separator 16 through a pipeline, the upper outlet of the steam-water separator 16 is connected to a steam-washing tank car through a pipeline, the lower outlet of the steam-water separator 16 is connected to the distillation retort 12 through a pipeline and a high-temperature water circulating pump 18, high-temperature gas enters the steam-water separator 16 through the oxidation device heat exchanger 21, the gas is sent to the steam-washing tank car for use, one part of liquid directly returns to the oxidation device heat exchanger 21, the other part of liquid is sent to the distillation retort 12 for use through the high-temperature water circulating pump 18 and the distillation retort saturated water inlet valve 13, and the liquid after being cooled in the distillation retort 12 returns to the steam-water separator 16 through.
preferably, a right atomizing spray gun 25 and a left atomizing spray gun 26 are provided at the upper portion of the oxidizer thermal storage oxidation chamber 22, a right burner 24 and a left burner 27 are provided at both sides of the oxidizer thermal storage oxidation chamber 22, an oxidizer heat exchanger 21 is provided below the oxidizer thermal storage oxidation chamber 22, and an oxidizer reversing valve 20 is provided below the oxidizer heat exchanger 21.
an organic gas concentration sensor 28 and a main fan 30 are installed at the inlet end of the reversing valve 20 of the oxidation device, an air inlet of the main fan 30 is connected with a fire retardant waterfall device 33 through an air blender 31 and a safety protection valve 32, and a fire retardant waterfall device liquid return valve 34 is arranged at the lower part of the fire retardant waterfall device 33.
The invention relates to a waste water-waste gas combined treatment process for a steam washing tank body of a liquid tank truck, which adopts the technical scheme that the process comprises the following steps:
Firstly, when a tank body needs to be steamed and washed, a gasification device is started firstly: opening an air valve on an air mixer 31, starting a right combustor 24 and a left combustor 27 by using auxiliary fuel, preheating a heat storage and oxidation chamber 22 of the oxidation device, simultaneously starting a main fan 30, an oxidation device reversing valve 20 and an air compressor 29, and entering a normal operation stage after the temperature in the heat storage and gasification chamber 22 of the oxidation device reaches a normal operation temperature;
Secondly, opening a safety protection valve 32, properly closing or closing an air valve on an air blender 31, opening a high-temperature water circulating pump 18, sending waste gas discharged from the steam tank into a heat storage oxidation chamber 22 of the oxidation device by a main fan 30, and simultaneously starting a waste water output pump 7 to close and send waste water in the organic matter waste water pool 5 into the distillation tank 12; starting the high-pressure jet burning pump 9 to atomize and spray the waste into the heat storage gasification chamber 22 of the gasification device; the waste gas and the organic substances in the atomized waste water are oxidized or combusted in a heat accumulation oxidation chamber 22 of the oxidation device, the released heat flows downwards along with the wind flow through a heat exchanger 21 of the oxidation device and is taken out by a high-temperature water circulating pump 18, steam-water separation is carried out in a steam-water separator 16 to generate steam, and the steam is sent to a tank body of a steaming and washing tank car through a pipeline; the other part of the heat in the steam-water separator 16 can be shunted to a heat exchanger in the distillation retort 12, the water and the low-boiling organic matters in the wastewater are distilled out under the condition of micro negative pressure in the distillation retort 12, and then the distilled water, the waste gas in the tank body of the tank car and the waste gas at the top of the organic matter wastewater pool 5 are sent into a heat storage oxidation chamber 22 of the oxidation device by a main fan 30 for high-temperature oxidation treatment; organic matters such as concentrated pure oil products and the like at the bottom of the distillation tank 12 are separated and recycled to the organic liquid pool 3 and are used as fuel of a burner for equipment operation or other purposes;
thirdly, in the waste gas flow, the waste water separated out in the fire-retardant waterfall device 33 and the oxidation device reversing valve 20 respectively flows back to the organic waste water tank 5 through the fire-retardant waterfall device liquid return valve 34 and the oxidation device liquid return valve 19; according to actual working requirements, the treatment and utilization amount of wastewater, waste gas and water vapor can be adapted by adjusting a main fan 30, a high-pressure jet burning pump 9, a distillation tank saturated water inlet valve 13 and a distillation tank saturated water outlet valve 14;
Fourthly, when the machine is stopped, firstly, the fuel of the right combustor 24 and the fuel of the left combustor 27 are closed, and then the high-pressure jet combustion pump 9 is closed; when the pressure in the steam-water separator 16 is less than 10kPa or the temperature is less than 100 ℃, finally closing the main fan 30, the safety protection valve 32 and the high-temperature water circulating pump 18 in sequence; after the air channels and the air compressor 29 of the right combustor 24 and the left combustor 27 are continuously maintained for a period of time, the air channels and the air compressor are closed together with other circuits and air channel equipment.
Preferably, the invention also comprises the following safety protection measures:
firstly, taking the signal of an organic gas concentration sensor 28 as a source signal, controlling the rotating speed of a main fan 30, and ensuring that the concentration of the waste gas entering a heat-storage oxidation chamber 22 of the oxidation device is in a set concentration range; under the condition of a certain rotating speed, the temperature of the inner cavity of the heat accumulation oxidation chamber 22 of the oxidation device and the temperature value of the heat accumulator are used as source signals for controlling and adjusting the reversing time of a reversing valve 20 of the oxidation device, the waste water atomization spraying amount of a right atomization spray gun 25 and a left atomization spray gun 26, and the work loads of a right combustor 24 and a left combustor 27;
And secondly, when the liquid level of the steam-water separator 16 is in a low limit, the high-temperature water circulating pump 18 is in a fault shutdown state, the liquid level of the distillation tank 12 is in a low limit, and the temperature of the inner cavity of the heat storage oxidation chamber 22 of the oxidation device is ultrahigh and out of control, the main fan 30 is in linkage alarm and stopped running, and the safety protection valve 32 is closed within 1.5 seconds.
Embodiment 2, the difference of the waste water-waste gas combined treatment equipment for the evaporation and washing tank body of the liquid tank truck in the invention from embodiment 1 is as follows:
A group of atomizing spray guns are arranged at the upper part of the heat-accumulating oxidation chamber 22 of the oxidation device, and a group of burners are respectively arranged at two sides of the heat-accumulating oxidation chamber 22 of the oxidation device; in addition, three tank truck waste gas collecting covers 1 are arranged at each steam washing tank truck position, and the tank truck waste gas collecting covers 1 are respectively arranged at the two sides and the top of each steam washing tank truck position.
the above description is only a few of the preferred embodiments of the present invention, and any person skilled in the art may modify the above-described embodiments or modify them into equivalent ones. Therefore, any simple modifications or equivalent substitutions made in accordance with the technical solution of the present invention are within the scope of the claims of the present invention.
Claims (9)
1. The utility model provides a liquid tank car evaporates washes jar body waste water-waste gas combined treatment equipment which characterized by: mainly comprises a tank car waste gas collecting cover (1), an organic liquid pool (3), an oil skimming machine (4), an organic waste water pool (5), a waste water output pump (7), a high-pressure spray burning pump (9), a distillation tank (12), a steam-water separator (16), a high-temperature water circulating pump (18), an oxidation device reversing valve (20), an oxidation device heat exchanger (21), an oxidation device heat accumulation oxidation chamber (22), an oxidation device exhaust chimney (23), a burner, an atomizing spray gun, an air compressor (29), a main fan (30), an air blender (31) and a fire retardant waterfall draining device (33), wherein the tank car waste gas collecting cover (1), the organic waste water pool (5) and the distillation tank (12) are connected through pipelines to form a tank car waste gas, an organic waste water pool waste gas and a distillation tank waste gas collecting part, and the organic waste gas is converged and then enters the oxidation device heat accumulation oxidation chamber (22) to oxidize organic, wherein each steam washing tank car position is provided with at least one tank car waste gas collecting cover (1); the organic liquid pool (3), the oil skimming machine (4), the organic waste water pool (5) and the distillation retort oil drain valve (11) are connected through pipelines to form an organic liquid collecting part; a waste water output pump (7), a high-pressure spray burning pump (9), one or more groups of atomizing spray guns, an air compressor (29) and one or more groups of burners are connected through pipelines to form an organic waste water atomizing spray burning part; the distillation tank (12), the steam-water separator (16), the high-temperature water circulating pump (18) and the oxidation device heat exchanger (21) are connected through pipelines to form an oxidation heat extraction and utilization part; the oxidation device reversing valve (20), the oxidation device heat exchanger (21) and the oxidation device heat accumulation oxidation chamber (22) are sequentially connected and installed from bottom to top to form the oxidation device main body part; the organic gas concentration sensor (28), the main fan (30), the air blender (31), the safety protection valve (32) and the fire-retardant waterfall discharging device (33) are sequentially connected to form a safety protection part.
2. The waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 1, which is characterized in that: at least one tank truck waste gas collecting cover (1) is arranged on the upper portion of each steaming and washing tank truck, the tank truck waste gas collecting covers (1) are gathered together through pipelines and are connected to the upper portion of the organic matter wastewater pond (5) and the upper portion of the distillation tank (12), and after the three pipelines are gathered, the tank truck waste gas collecting covers enter the oxidation device through a fire retardant waterfall draining device (33), an air mixer (31) and a main fan (30).
3. the waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 1, which is characterized in that: an oil skimming machine (4) is arranged on the upper side of the organic matter wastewater pool (5), and an organic liquid pool (3) is arranged on one side of the organic matter wastewater pool (5); the bottom of the distillation retort (12) is provided with a distillation retort oil drain valve (11), and the distillation retort oil drain valve (11) is connected to the organic liquid pool (3) through a pipeline.
4. the waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 3, which is characterized in that: the outlet end of the organic matter wastewater pool (5) is connected to the inlet end of a distillation tank (12) through a pipeline and a wastewater output pump (7), the outlet end of the distillation tank (12) is connected to a right atomization spray gun (25) and a left atomization spray gun (26) through a pipeline and a high-pressure spray burning pump (9), and an air compressor (29) is connected to the right atomization spray gun (25) and the left atomization spray gun (26) through pipelines.
5. the waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 1, which is characterized in that: the outlet end of the oxidation device heat exchanger (21) is connected to the inlet end of the steam-water separator (16) through a pipeline, the upper outlet of the steam-water separator (16) is connected to a steam-washing tank car through a pipeline, the lower outlet of the steam-water separator (16) is connected to the distillation tank (12) through a pipeline and a high-temperature water circulating pump (18), high-temperature gas enters the steam-water separator (16) through the oxidation device heat exchanger (21), the gas is sent to the steam-washing tank car for use, one part of the liquid directly returns to the oxidation device heat exchanger (21), the other part of the liquid is sent to the distillation tank (12) for use through the high-temperature water circulating pump (18) and the distillation tank saturated water inlet valve (13), and the liquid after being cooled in the distillation tank (12) returns to the steam-water separator (16).
6. The waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 1, which is characterized in that: the upper portion of oxidation unit heat accumulation oxidation chamber (22) is equipped with right atomizing spray gun (25) and left atomizing spray gun (26), and the both sides of oxidation unit heat accumulation oxidation chamber (22) are equipped with right combustor (24) and left combustor (27) respectively, are equipped with oxidation unit heat exchanger (21) in the below of oxidation unit heat accumulation oxidation chamber (22), are equipped with oxidation unit switching-over valve (20) in the below of oxidation unit heat exchanger (21).
7. The waste water-waste gas combined treatment device for the evaporation and washing tank body of the liquid tank truck as claimed in claim 6, which is characterized in that: an organic gas concentration sensor (28) and a main fan (30) are installed at the inlet end of a reversing valve (20) of the oxidation device, an air inlet of the main fan (30) is connected with a fire retardant waterfall draining device (33) through an air blender (31) and a safety protection valve (32), and a fire retardant waterfall draining device liquid return valve (34) is arranged at the lower part of the fire retardant waterfall draining device (33).
8. A process for realizing the combined treatment of waste water and waste gas in the evaporation and washing tank body of a liquid tank truck by adopting the device as claimed in any one of claims 1 to 7, which is characterized in that:
Firstly, when a tank body needs to be steamed and washed, a gasification device is started firstly: opening an air valve on an air blender (31), starting a right burner (24) and a left burner (27) by using auxiliary fuel, preheating a heat storage oxidation chamber (22) of the oxidation device, simultaneously starting a main fan (30), a reversing valve (20) of the oxidation device and an air compressor (29), and entering a normal operation stage after the temperature in the heat storage gasification chamber (22) of the oxidation device reaches a normal operation temperature;
Secondly, opening a safety protection valve (32), properly closing or closing an air valve on an air blender (31), opening a high-temperature water circulating pump (18), sending waste gas discharged by the steam tank into a heat storage oxidation chamber (22) of an oxidation device by a main fan (30), and simultaneously starting a waste water output pump (7) to close and send waste water in an organic waste water pool (5) into the distillation tank (12); starting a high-pressure jet burning pump (9) to spray the waste atomized water into a heat storage gasification chamber (22) of the gasification device; organic substances in the waste gas and the atomized waste water are oxidized or combusted in a heat storage oxidation chamber (22) of the oxidation device, the released heat flows downwards along with the wind flow through a heat exchanger (21) of the oxidation device and is taken out by a high-temperature water circulating pump (18), steam-water separation is carried out in a steam-water separator (16) to generate steam, and the steam is sent to a tank body of a steaming and washing tank car through a pipeline; the other part of heat in the steam-water separator (16) can be shunted to a heat exchanger in the distillation retort (12), water and low-boiling-point organic matters in the wastewater are distilled out under the condition of micro negative pressure in the distillation retort (12), and then the distilled water, the waste gas in the tank body of the tank car and the waste gas at the top of the organic matter wastewater tank (5) are sent into a heat-storage oxidation chamber (22) of an oxidation device for high-temperature oxidation treatment by a main fan (30); the concentrated and pure oil organic matters at the bottom of the distillation tank (12) are separated and recycled to the organic liquid pool (3) and are used as the fuel of a burner for equipment operation or other purposes;
Thirdly, in the waste gas flow, waste water separated out in the fire-retardant waterfall device (33) and the reversing valve (20) of the oxidation device respectively flows back into the organic waste water tank (5) through a liquid return valve (34) of the fire-retardant waterfall device and a liquid return valve (19) of the oxidation device; according to actual working requirements, the treatment and utilization quantity of waste water, waste gas and water vapor can be adapted by adjusting a main fan (30), a high-pressure jet burning pump (9), a distillation tank saturated water inlet valve (13) and a distillation tank saturated water outlet valve (14);
Fourthly, when the machine is shut down, firstly, the fuel of the right combustor (24) and the fuel of the left combustor (27) are closed, and then the high-pressure jet combustion pump (9) is closed; when the pressure in the steam-water separator (16) is less than 10kPa or the temperature is less than 100 ℃, finally closing the main fan (30), the safety protection valve (32) and the high-temperature water circulating pump (18) in sequence; and after the air channels and the air compressor (29) of the right combustor (24) and the left combustor (27) are continuously maintained for a period of time, the air channels and the air compressor are closed together with other circuits and air channel equipment.
9. The waste water-waste gas combined treatment process for the evaporation and washing tank body of the liquid tank truck as claimed in claim 8, which is characterized in that: the following safety protection measures are also included:
The method comprises the following steps of (I) controlling the rotating speed of a main fan (30) by taking a signal of an organic gas concentration sensor (28) as a source signal to ensure that the concentration of waste gas entering a heat storage oxidation chamber (22) of an oxidation device is in a set concentration range; under the condition of a certain rotating speed, the temperature of the inner cavity of the heat accumulation oxidation chamber (22) of the oxidation device and the temperature value of the heat accumulator are used as source signals for controlling and adjusting the reversing time of a reversing valve (20) of the oxidation device, the waste water atomization spraying amount of a right atomization spray gun (25) and a left atomization spray gun (26), and the work loads of a right combustor (24) and a left combustor (27);
And secondly, when the liquid level of the steam-water separator (16) is low, the high-temperature water circulating pump (18) is stopped due to a fault, the liquid level of the distillation tank (12) is low, and the temperature of the inner cavity of the heat storage oxidation chamber (22) of the oxidation device is ultrahigh and out of control, the alarm is linked, the main fan (30) is stopped, and the safety protection valve (32) is closed within 1.5 seconds.
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| CN201910843397.3A CN110563235A (en) | 2019-09-06 | 2019-09-06 | Liquid tank truck evaporation and washing tank body waste water-waste gas combined treatment equipment and process |
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| CN201910843397.3A CN110563235A (en) | 2019-09-06 | 2019-09-06 | Liquid tank truck evaporation and washing tank body waste water-waste gas combined treatment equipment and process |
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