CN214598112U - Methanol waste gas treatment device in coking industry - Google Patents
Methanol waste gas treatment device in coking industry Download PDFInfo
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- CN214598112U CN214598112U CN202023061942.0U CN202023061942U CN214598112U CN 214598112 U CN214598112 U CN 214598112U CN 202023061942 U CN202023061942 U CN 202023061942U CN 214598112 U CN214598112 U CN 214598112U
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Abstract
The utility model relates to the technical field of waste gas treatment, and discloses a methanol waste gas treatment device in the coking industry, which comprises a gas collecting hood, a gas supply pipe, a washing separation tower, an exhaust pipe and an incineration device; the gas-collecting hood is used for collecting methanol waste gas generated by a waste gas source and then sending the methanol waste gas to the washing and separating tower; the washing and separating tower is internally provided with a packing layer, a spraying device and a separating and demisting device, methanol waste gas entering the washing and separating tower is washed by spraying water and is subjected to separating and demisting, the separated waste gas is sent to the burning device for burning treatment through the exhaust port and the exhaust pipe, and the spraying water is collected at the bottom of the tower and is sent to the spraying device for recycling. The utility model discloses a coking industry methyl alcohol exhaust treatment device process reasonable in design adopts the washing to absorb + burn the methyl alcohol waste gas that the mode that handles the combination produced the waste gas source and wash absorption, separation defogging and burn the processing, and exhaust-gas treatment is efficient, and energy saving and consumption reduction is favorable to the environmental protection.
Description
Technical Field
The utility model relates to a waste gas treatment technical field, more specifically relates to a coking industry methyl alcohol exhaust treatment device.
Background
Methanol is used as a basic organic chemical raw material and is widely applied to the fields of fine chemical industry, plastics, energy sources and the like at present. Methanol is easy to volatilize at normal temperature or during heating, has toxicity, and methanol gas and air are easy to form explosive mixtures, so that combustion and explosion accidents are easy to cause when the methanol gas meets open fire and high heat energy. Therefore, in the methanol production process of the coking industry, because raw materials, intermediate products and final products can volatilize, so that production devices, product tank areas, loading stations and the like can volatilize to generate waste gas, especially, the tank top of a methanol storage tank can be provided with a plurality of breather valves to balance the internal and external air pressure according to the safety requirements, the breather valves are mostly directly emptied, and the generated waste gas contains methanol and can not only cause environmental pollution and energy waste if directly discharged into the atmosphere, but also bring safety hidden troubles.
Along with the increasing attention of people to the environmental problem, the emission standard aiming at the waste gas of chemical enterprises is more and more strict, so the methanol waste gas in the coking industry can be discharged after being treated to reach the standard. At present, the common treatment methods of organic waste gas in the chemical industry include a plasma elimination method, a direct combustion method, an absorption and adsorption combined method and the like. However, the plasma abatement method cannot solve the problem of plasma recovery; the direct combustion method has the advantages that when the concentration of organic matters in the waste gas is low, the utilization rate of the device is low, the energy consumption is high, and the operation safety of the device is limited by the conditions of a factory; the tail gas of the absorption and adsorption combined method still has high methanol content and still needs to be purified, so the treatment methods have defects, the application range is limited, and the treatment effect is not ideal.
Therefore, it is necessary to provide a methanol waste gas treatment device for the coking industry, which solves the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a coking industry methyl alcohol exhaust treatment device mainly used solves the organic waste gas common processing method of present chemical industry and all has the weak point such as plasma elimination method, direct combustion method, absorption + absorption combination method, and application scope is limited and the treatment effect is ideal inadequately, is not suitable for coking industry methyl alcohol exhaust treatment's problem.
For solving the technical problem, the utility model discloses the technical scheme who adopts as follows:
a methanol waste gas treatment device in the coking industry comprises a gas collecting hood, a gas supply pipe, a washing separation tower, an exhaust pipe and an incineration device which are sequentially connected through a pipeline;
the gas collecting hood is used for collecting methanol waste gas generated by a waste gas source and then sending the methanol waste gas to the washing and separating tower through the gas sending pipe for treatment; the waste gas source comprises a production device, a methanol tank area and a loading station crane pipe, and the gas collecting hoods correspondingly arranged at the positions of the waste gas sources are all collected by open negative pressure.
A packing layer, a spraying device and a separation demisting device are arranged in the washing and separating tower at intervals from bottom to top, an air inlet communicated with the air supply pipe is arranged at the side part of the washing and separating tower, an air outlet is arranged at the top part of the washing and separating tower, and a liquid outlet is arranged at the bottom part of the washing and separating tower;
the methanol waste gas entering the washing and separating tower is washed by the spraying water from the spraying device and is separated and demisted by the separation demisting device, the separated waste gas is sent to the burning device for burning treatment through the exhaust port and the exhaust pipe, and the spray water is collected at the tower bottom and is sent to the spraying device for recycling. Although the methanol is easy to dissolve in water, when the concentration of the methanol in the methanol waste gas is low, the alcohol content in the spray water for washing the waste gas is low, the system treatment load can be increased if the methanol is directly discharged to a factory sewage treatment system for treatment, and simultaneously, a large amount of raw water is wasted, so that the production cost is greatly increased, and the spray water can be recycled to be in an adsorption saturated state and then discharged to the sewage treatment system.
Furthermore, the air supply pipe extends into the position below the liquid level in the washing and separating tower through the air inlet, so that the water seal safety protection effect can be realized, and the gas in the washing and separating tower is prevented from flowing back to the gas collecting hood to be dissipated.
Furthermore, the spraying device consists of a spraying water pipe and a plurality of spiral nozzles, the spiral nozzles are arranged at the bottom of the spraying water pipe, and the spiral nozzles are uniformly distributed in the washing and separating tower along the radial direction in an annular manner; and the spray water collected at the bottom of the washing separation tower is distributed to each spiral nozzle through the spray water pipe, is dispersed by the spiral nozzles to form water mist, and is sprayed to the packing layer to be fully contacted with the methanol waste gas flowing from bottom to top, so that organic matters which are easy to dissolve in water in the methanol waste gas are washed and absorbed. The spiral nozzle is a typical impact type dispersion spraying component, no part is arranged in the spiral nozzle, the spiral nozzle is a smooth channel, the spiral nozzle is naturally designed and has the characteristic of blockage resistance, and water flow is changed into tiny liquid beads to be sprayed out to form fog after being tangent and collided with a continuously reduced spiral surface on the periphery of the spiral nozzle.
Furthermore, the separation defogging device comprises a baffle defogger and a wire mesh defogger which are stacked up and down. The aim at who sets up two kinds of types defroster improves defogging efficiency, because waste gas is after the washing processing, wherein can smuggle a large amount of tiny liquid drops secretly, directly discharges not only can lead to the water yield consumption of whole device big, also can increase the exhaust gas volume moreover, aggravates aftertreatment system's load, consequently need through separation defogging device interception defogging after, reduce the fog foam and smuggle secretly, send into the device that burns again and handle.
Furthermore, the filler of the filler layer is a plastic hollow ball filler, the plastic hollow ball filler is light in weight, high in structural strength and corrosion-resistant, and has the advantages of large fluid flux, low pressure drop, large specific surface area and high liquid stagnation in filler gaps, so that waste gas in the washing and separating tower can be uniformly distributed, the contact area of the gas and the liquid can be increased, and the gas-liquid mass and heat transfer effect can be enhanced.
Furthermore, the packing layer and the spraying device are arranged up and down correspondingly, and the packing layer and the spraying device are respectively arranged in the washing separation tower at least in two groups, so that the contact area of the waste gas and the spraying liquid water can be increased, the contact time is prolonged, and the washing and absorbing effects of the spraying liquid on water-soluble organic matters in the waste gas are enhanced.
Further, the air supply pipe is provided with a first fan which is used for generating negative pressure at the inlet of the gas collecting hood so as to quickly and thoroughly absorb and collect the methanol waste gas; and the exhaust pipe is provided with a second fan which is used for sucking the gas discharged from the top of the washing and separating tower and sending the gas to the incineration device.
Furthermore, a safe water seal groove is formed in the position, close to the incineration device, of the exhaust pipe, and the exhaust gas discharged from the top of the washing separation tower breaks through the safe water seal groove along the exhaust pipe and then is sent to the incineration device for treatment.
Furthermore, the exhaust pipe is also provided with a sampling pipe in a matching way for sampling and detecting the concentration of combustible substances in the waste gas; still be provided with the third fan on the blast pipe, the third fan be located safe water seal tank with burn between the device, the entrance of third fan can set up the branch pipe of switch-on outside air for come the air distribution through introducing the air and dilute the entering combustible substance concentration in the waste gas of burning the device.
Furthermore, the boiler device in the factory is preferably selected by the incineration device, and the waste gas is introduced into the boiler device for combustion, so that the equipment investment cost can be reduced, the waste gas can be subjected to harmless treatment, the heat can be recycled, the boiler fuel can be saved, the energy can be saved, the consumption can be reduced, and the environment can be protected.
Furthermore, the spray water adopted by the spray device in the washing and separating tower is desalted water, and the side part of the washing and separating tower is provided with a water replenishing pipe for replenishing the desalted water in the washing and separating tower.
Furthermore, a circulating water pipe for communicating the liquid outlet with the spraying device is arranged outside the washing and separating tower, and a pressure pump is arranged on the circulating water pipe; and the circulating water pipe is also provided with a liquid discharge branch pipe for periodically discharging the spray water with saturated adsorption to a sewage treatment system of a plant area for treatment.
Compared with the prior art, the utility model discloses technical scheme's beneficial effect is:
1. the utility model discloses a coking industry methyl alcohol exhaust treatment device process design is reasonable, and equipment is small in quantity, and investment cost is low, and each equipment is established ties each other, is favorable to the serialization operation. The method comprises the following steps of collecting methanol waste gas generated by a waste gas source through a gas collecting hood and a gas supply pipe and conveying the methanol waste gas into a washing separation tower in a washing absorption and incineration treatment combined mode, uniformly distributing through a packing layer, washing and absorbing by spray water and demisting and separating treatment in sequence, absorbing and entraining water-soluble components in the methanol waste gas by the spray water, and conveying water-insoluble organic matters to an incineration device for combustion treatment;
2. the methanol waste gas treatment device in the coking industry has the advantages of easy operation, safe and stable operation, large waste gas treatment capacity and high treatment efficiency, and the waste gas separated by washing can be sent to a factory boiler device for incineration, and the heat of the waste gas can be recycled, thereby achieving the effects of energy conservation and consumption reduction, and being suitable for popularization and application;
3. the utility model discloses a spray water among the coking industry methyl alcohol exhaust treatment device can cyclic utilization send into sewage treatment system again after to adsorbing the saturated condition and handle to practice thrift the water consumption, be favorable to the environmental protection, and can reduce device running cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a process flow chart of the methanol waste gas treatment device in the coking industry of the utility model.
In the figure: 1-gas collecting hood, 2-gas feeding pipe, 21-first fan, 3-washing separation tower, 31-packing layer, 32-spraying device, 321-spraying water pipe, 322-spiral nozzle, 33-separation demisting device, 331-baffle demister, 332-silk screen demister, 34-gas inlet, 35-gas outlet, 36-liquid outlet, 37-water replenishing pipe, 38-circulating water pipe, 381-pressure pump, 382-liquid discharging branch pipe, 4-gas discharging pipe, 41-second fan, 42-safe water seal tank, 43-sampling pipe, 44-third fan, 5-burning device, 6-waste gas source, 61-production device, 62-methanol tank area and 63-loading station crane pipe.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for better illustration of the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The description of "first", "second", etc. referred to in the embodiments of the present invention is for descriptive purposes only and is not to be construed as indicating or implying any relative importance or implicit indication of the number of technical features indicated, whereby the features defined as "first", "second", etc. may explicitly or implicitly include at least one such feature.
Meanwhile, the terms "upper", "lower", "front", "rear", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the designated device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, so to speak, connected internally to the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
For the purpose of clearly understanding the technical features, objects, and effects of the present invention, the detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, a methanol waste gas treatment device in the coking industry comprises a gas collecting hood 1, a gas feeding pipe 2, a washing separation tower 3, an exhaust pipe 4 and an incineration device 5 which are sequentially connected through a pipeline;
the gas collecting hood 1 is used for collecting methanol waste gas generated by a waste gas source 6 and then sending the methanol waste gas to the washing and separating tower for treatment through the gas supply pipe 2; the waste gas source 6 comprises a production device 61, a methanol tank area 62 and a loading station crane pipe 63, and the gas collecting channel 1 correspondingly arranged at each waste gas source is collected by open negative pressure.
A packing layer 31, a spraying device 32 and a separation demisting device 33 are arranged in the washing and separating tower 3 at intervals from bottom to top, the side part of the washing and separating tower 3 is provided with an air inlet 34 communicated with the air supply pipe 2, the top part of the washing and separating tower 3 is provided with an air outlet 35, and the bottom part of the washing and separating tower 3 is provided with a liquid outlet 36;
the methanol waste gas entering the washing and separating tower 3 is washed by the spraying water from the spraying device 32 and is separated and demisted by the separating and demisting device 33, the separated waste gas is sent to the burning device 5 for burning treatment through the exhaust port 35 and the exhaust pipe 4, and the spraying water is collected at the tower bottom and sent to the spraying device 32 for recycling. Although the methanol is easy to dissolve in water, when the concentration of the methanol in the methanol waste gas is low, the alcohol content in the spray water for washing the waste gas is low, the system treatment load can be increased if the methanol is directly discharged to a factory sewage treatment system for treatment, and simultaneously, a large amount of raw water is wasted, so that the production cost is greatly increased, and the spray water can be recycled to be in an adsorption saturated state and then discharged to the sewage treatment system.
The gas pipe 2 extends into the washing and separating tower 3 through the gas inlet 34, so as to play a role of water seal safety protection and prevent the gas in the washing and separating tower 3 from flowing back to the gas collecting hood 1 to dissipate.
The spraying device 32 is composed of a spraying water pipe 321 and a plurality of spiral nozzles 322, the spiral nozzles 322 are arranged at the bottom of the spraying water pipe 321, and the plurality of spiral nozzles 322 are uniformly distributed in the washing and separating tower 3 along the radial direction and in a ring shape; the spray water collected at the bottom of the washing and separating tower 3 is distributed to each spiral nozzle 322 through the spray water pipe 321, and is dispersed by the spiral nozzles 322 to form water mist which is sprayed to the packing layer 31 and fully contacts with the methanol waste gas flowing from bottom to top, so that the organic matters which are easy to dissolve in water in the methanol waste gas are washed and absorbed. The spiral nozzle is a typical impact type dispersion spraying component, no part is arranged in the spiral nozzle, the spiral nozzle is a smooth channel, the spiral nozzle is naturally designed and has the characteristic of blockage resistance, and water flow is changed into tiny liquid beads to be sprayed out to form fog after being tangent and collided with a continuously reduced spiral surface on the periphery of the spiral nozzle.
The separation demister 33 includes a baffle demister 331 and a wire demister 332 disposed in an up-and-down stacked manner. The purpose of setting up two kinds of types of defroster is in order to improve defogging efficiency, because waste gas is after the washing processing, wherein can smuggle a large amount of tiny liquid drops secretly, and direct emission not only can lead to the water consumption of whole device big, also can increase the exhaust gas volume moreover, aggravates aftertreatment system's load, consequently need through separation defogging device 33 interception defogging after, reduce the fog foam and smuggle secretly, send into again and burn 5 handles of device.
The filler of the filler layer 31 is a plastic hollow ball filler which is light in weight, high in structural strength and corrosion-resistant, and has the advantages of large fluid flux, low pressure drop, large specific surface area and high liquid stagnation in filler gaps, so that the waste gas in the washing and separating tower 3 can be uniformly distributed, the gas-liquid contact area can be increased, and the gas-liquid mass and heat transfer effect can be enhanced.
The packing layer 31 and the spraying device 32 are arranged up and down correspondingly, and the packing layer 31 and the spraying device 32 are respectively arranged in two groups in the washing separation tower 3, so that the contact area of the waste gas and the spraying liquid water can be increased, the contact time is prolonged, and the washing and absorption effects of the spraying liquid on water-soluble organic matters in the waste gas are enhanced.
The air feed pipe 2 is provided with a first fan 21 for generating negative pressure at the inlet of the gas collecting hood 1, thereby quickly and thoroughly absorbing and collecting methanol waste gas; the exhaust duct 4 is provided with a second fan 41 for sucking the gas discharged from the top of the scrubbing-and-separating tower 3 and sending it to the incineration apparatus 5.
The part of the exhaust pipe 4 close to the burning device 5 is provided with a safe water seal groove 42, and the waste gas discharged from the top of the washing and separating tower 3 is sent to the burning device 5 for treatment after breaking through the safe water seal groove 42 along the exhaust pipe 4.
The exhaust pipe 4 is also provided with a sampling pipe 43 for sampling and detecting the concentration of combustible substances in the exhaust gas; the exhaust pipe 4 is further provided with a third fan 44, the third fan 44 is positioned between the safe water seal tank 42 and the incineration device 5, and a branch pipe (not shown in the figure) communicated with the outside air can be arranged at an inlet of the third fan 44, so that the concentration of combustible substances in the waste gas entering the incineration device 5 is diluted by introducing air to be lower than an explosion limit value, and the combustion safety is ensured.
The incineration device 5 adopts a boiler device of a plant area, and the waste gas is introduced into the boiler device for combustion, so that the equipment investment cost can be reduced, the waste gas can be subjected to harmless treatment, the heat is recycled, the boiler fuel is saved, the energy is saved, the consumption is reduced, and the environmental protection is facilitated.
The spray water adopted by the spray device 32 in the washing and separating tower 3 is desalted water, the side part of the washing and separating tower 3 is provided with a water replenishing pipe 37 for replenishing the desalted water in the washing and separating tower 3, and the desalted water is consumed in the long-term operation process of the washing and separating tower 3, so that the regular water replenishing of the liquid level in the tower is needed to ensure the washing effect.
A circulating water pipe 38 for communicating the liquid outlet 36 with the spraying device 32 is arranged outside the washing and separating tower 3, and a pressure pump 381 is arranged on the circulating water pipe 38; the circulating water pipe 38 is further provided with a liquid discharge branch pipe 382 for periodically discharging the spray water saturated in adsorption to a sewage treatment system of a plant area for treatment.
In the drawings, the positional relationship is described for illustrative purposes only and is not to be construed as limiting the present patent; it is to be understood that the above-described embodiments of the present invention are merely examples provided for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A methanol waste gas treatment device in the coking industry is characterized by comprising a gas collecting hood, a gas feeding pipe, a washing separation tower, an exhaust pipe and an incineration device which are sequentially connected through a pipeline;
the gas collecting hood is used for collecting methanol waste gas generated by a waste gas source and then sending the methanol waste gas to the washing and separating tower through the gas sending pipe for treatment;
a packing layer, a spraying device and a separation demisting device are arranged in the washing and separating tower at intervals from bottom to top, an air inlet communicated with the air supply pipe is arranged at the side part of the washing and separating tower, an air outlet is arranged at the top part of the washing and separating tower, and a liquid outlet is arranged at the bottom part of the washing and separating tower;
and the methanol waste gas entering the washing and separating tower is washed by the spraying water from the spraying device and is separated and demisted, the separated waste gas is sent to the burning device for treatment through the exhaust port and the exhaust pipe, and the spraying water is collected at the tower bottom and is sent to the spraying device for recycling.
2. The methanol waste gas treatment device in the coking industry according to claim 1, characterized in that the spraying device is composed of a spray header and a plurality of spiral nozzles, the spiral nozzles are arranged at the bottom of the spray header, and the spiral nozzles are uniformly distributed in the washing and separating tower along the radial direction and in an annular shape;
and the spray water collected at the bottom of the washing separation tower is distributed to each spiral nozzle through the spray water pipe, and is dispersed by the spiral nozzles to form water mist which is sprayed to the packing layer.
3. The methanol waste gas treatment device in the coking industry as claimed in claim 2, wherein the separation demisting device comprises a baffle demister and a wire mesh demister which are arranged in an up-and-down overlapping manner.
4. The methanol waste gas treatment device in the coking industry according to claim 3, characterized in that the filler of the filler layer is plastic hollow ball filler.
5. The methanol waste gas treatment device in the coking industry according to claim 4, wherein the packing layer and the spray device are arranged corresponding to each other up and down, and at least two groups of the packing layer and the spray device are respectively arranged in the washing separation tower.
6. The methanol waste gas treatment device in the coking industry as claimed in claim 5, wherein the air feed pipe is provided with a first fan for generating negative pressure at the inlet of the gas collecting hood and sucking the methanol waste gas;
and the exhaust pipe is provided with a second fan which is used for sucking the gas discharged from the top of the washing and separating tower and sending the gas to the incineration device.
7. The methanol waste gas treatment device in the coking industry according to claim 6, wherein a safe water seal groove is arranged on the exhaust pipe close to the incineration device, and waste gas discharged from the top of the washing and separating tower is sent to the incineration device for treatment after breaking through the safe water seal groove along the exhaust pipe.
8. The methanol waste gas treatment device in the coking industry according to claim 7, characterized in that the exhaust pipe is also provided with a sampling pipe for sampling and detecting the concentration of combustible substances in the waste gas;
the exhaust pipe is also provided with a third fan, and the third fan is positioned between the safe water seal tank and the incineration device and used for distributing air to dilute the concentration of combustible materials in the waste gas.
9. The methanol waste gas treatment device in the coking industry according to any one of claims 1 to 8, wherein spray water adopted by the spray device in the washing and separating tower is desalted water, and a water replenishing pipe is arranged at the side part of the washing and separating tower and used for replenishing desalted water in the washing and separating tower.
10. The methanol waste gas treatment device in the coking industry according to claim 9, wherein a circulating water pipe for communicating the liquid outlet with the spraying device is arranged outside the washing and separating tower, and a pressure pump is arranged on the circulating water pipe;
and the circulating water pipe is also provided with a liquid discharge branch pipe for sending the spray water with saturated adsorption to the sewage treatment device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023061942.0U CN214598112U (en) | 2020-12-17 | 2020-12-17 | Methanol waste gas treatment device in coking industry |
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| CN202023061942.0U CN214598112U (en) | 2020-12-17 | 2020-12-17 | Methanol waste gas treatment device in coking industry |
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| CN202023061942.0U Active CN214598112U (en) | 2020-12-17 | 2020-12-17 | Methanol waste gas treatment device in coking industry |
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