CN211025700U - Methyl chloride tail gas recovery device - Google Patents
Methyl chloride tail gas recovery device Download PDFInfo
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- CN211025700U CN211025700U CN201921899141.6U CN201921899141U CN211025700U CN 211025700 U CN211025700 U CN 211025700U CN 201921899141 U CN201921899141 U CN 201921899141U CN 211025700 U CN211025700 U CN 211025700U
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Abstract
The utility model provides a methyl chloride tail gas recovery unit, include: a steam supply device; a dry gas supply device; an adsorption/desorption device; the adsorption and desorption device is provided with a steam inlet, a dry gas inlet and a chloromethane tail gas inlet; the steam inlet is communicated with the steam outlet of the steam supply device; the air inlet of the dry air is communicated with the air outlet of the dry air supply device; the methyl chloride tail gas inlet is communicated with the exhaust port of the methyl chloride recovery system; a condensing unit; the air inlet of the adsorption desorption device is communicated with the air outlet of the adsorption desorption device; and the non-condensable gas exhaust port is communicated with the air inlet of the chloromethane recovery system; the liquid inlet of the condensate receiving tank is communicated with the liquid outlet of the condensing device; the adsorption and desorption device comprises more than two adsorption and desorption tanks which are connected in parallel; the adsorption and desorption tank is filled with an adsorbent. The recovery device can reduce the content of the methyl chloride in the discharged gas and is beneficial to recovering the methyl chloride gas in the methyl chloride tail gas.
Description
Technical Field
The utility model relates to a tail gas treatment field, in particular to methyl chloride tail gas recovery unit.
Background
Methyl chloride is a byproduct of the production of glyphosate and dimethyl phosphite, is a toxic gas, colorless, compressible into colorless liquid with ether odor and sweetness, has anesthetic effect, and is flammable. If the recycling treatment can not be effectively carried out, the emission does not reach the standard, and the environmental air is seriously polluted.
At present, the industrial recovery methods mainly include a condensation method, a membrane separation method, an absorption method, and the like. The compression condensation method is a common industrial recovery method, the compressor is used for compressing methyl chloride and then cooling and condensing, the condensed noncondensable exhaust gas can be combined with the membrane separation method, and the membrane separation method is used for recovering part of the methyl chloride in the exhaust gas.
However, as for the treatment of methyl chloride, there are incineration treatment and recovery treatment, such as the direct incineration treatment of the exhaust gas of methyl chloride as the raw material for producing organosilicon products, which causes waste of methyl chloride and environmental pollution; for the recovery treatment of methyl chloride, most of the existing recovery methods cannot effectively recycle methyl chloride or the recovery process is complicated. In the text of "comparison of methods for deeply recovering methyl chloride in tail gas" (corningpeng et al, petrochemical industry, vol. 40, 11, 2011), three schemes of a condensation method, a membrane separation method and an absorption method are respectively used for transformation and comparison of a methyl chloride recovery process, so that the content of methyl chloride in the tail gas before treatment is 27%, and the content of methyl chloride in the tail gas after treatment is 6.2%, 6.1% and 4.3%, respectively, although most of methyl chloride is recovered, the content of methyl chloride in the tail gas after treatment is still high, material loss is caused, and environmental influence is caused by emission.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a methyl chloride tail gas recovery unit. The utility model provides a methyl chloride tail gas recovery unit can effectively retrieve methyl chloride, has improved the rate of recovery of methyl chloride, has reduced the material loss, reaches the gaseous phase environmental protection emission requirement again.
The utility model provides a methyl chloride tail gas recovery unit, include:
a steam supply device;
a dry gas supply device;
an adsorption/desorption device; the adsorption and desorption device is provided with a steam inlet, a dry gas inlet and a chloromethane tail gas inlet; the steam inlet is communicated with the steam outlet of the steam supply device; the dry air inlet is communicated with an air outlet of the dry air supply device; the methyl chloride tail gas inlet is communicated with an exhaust port of a methyl chloride recovery system;
a condensing unit; the air inlet of the condensing device is communicated with the air outlet of the adsorption and desorption device; and the non-condensable gas exhaust port of the condensing device is communicated with the gas inlet of the chloromethane recovery system;
a condensate receiving tank; the liquid inlet of the condensate receiving tank is communicated with the liquid outlet of the condensing device;
the adsorption and desorption device comprises more than two adsorption and desorption tanks which are connected in parallel;
the adsorption and desorption tank is a tank body filled with an adsorbent.
In one embodiment of the utility model, a methyl chloride tail gas regulating valve is arranged on a methyl chloride tail gas inlet pipeline of each adsorption and desorption tank;
a steam regulating valve is arranged on a steam inlet pipeline of each adsorption and desorption tank;
and a dry gas regulating valve is arranged on the dry gas inlet pipeline of each adsorption and desorption tank.
In one embodiment of the utility model, the utility model also comprises a dry air blower;
the dry gas supply device is communicated with the adsorption and desorption device through the dry gas fan.
In one embodiment of the utility model, the device also comprises a methyl chloride tail gas fan;
and the adsorption and desorption device is communicated with the methyl chloride recovery system through the methyl chloride tail gas fan.
In one embodiment of the present invention, each adsorption and desorption tank is independently selected from an activated carbon adsorption and desorption tank, a molecular sieve adsorption and desorption tank, or a silica gel adsorption and desorption tank.
In one embodiment of the present invention, the steam inlet is disposed at an upper portion or a top portion of each adsorption and desorption tank.
In one embodiment of the present invention, the dry gas inlet is disposed at a lower portion or bottom of each adsorption/desorption tank.
In one embodiment of the present invention, the methyl chloride tail gas inlet is disposed at the lower part or bottom of each adsorption desorption tank.
In one embodiment of the present invention, the adsorption and desorption device includes two adsorption and desorption tanks connected in parallel;
each adsorption and desorption tank is an activated carbon adsorption and desorption tank.
In an embodiment of the present invention, the adsorption and desorption device is further provided with a high-altitude exhaust port.
The utility model provides a methyl chloride tail gas recovery unit, include: a steam supply device; a dry gas supply device; an adsorption/desorption device; the adsorption and desorption device is provided with a steam inlet, a dry gas inlet and a chloromethane tail gas inlet; the steam inlet is communicated with the steam outlet of the steam supply device; the dry air inlet is communicated with an air outlet of the dry air supply device; the methyl chloride tail gas inlet is communicated with an exhaust port of a methyl chloride recovery system; a condensing unit; the air inlet of the condensing device is communicated with the air outlet of the adsorption and desorption device; and the non-condensable gas exhaust port of the condensing device is communicated with the gas inlet of the chloromethane recovery system; a condensate receiving tank; the liquid inlet of the condensate receiving tank is communicated with the liquid outlet of the condensing device; the adsorption and desorption device comprises more than two adsorption and desorption tanks which are connected in parallel; the adsorption and desorption tank is a tank body filled with an adsorbent.
The utility model provides an among the methyl chloride tail gas recovery unit, the absorption desorption device includes the absorption desorption jar that two above are parallelly connected each other, each absorption desorption jar is acted as the adsorption tank and is desorbed the jar in turn, methyl chloride tail gas lets in an absorption desorption jar and carries out the adsorption treatment of methyl chloride, after adsorbing saturation, switch over to another absorption desorption jar and continue the adsorption treatment, simultaneously, the jar body that adsorbs saturation at present carries out the desorption treatment, make the internal adsorbent desorption methyl chloride of jar and release, the jar body can regard as the adsorption tank again at present and reserve; condensing the released chlorine-containing methane gas, and sending the non-condensable methane chloride gas back to a methane chloride recovery system to recover the methane chloride again; and (4) discharging purified gas in high altitude after adsorption treatment by the adsorption tank.
The chloromethane tail gas recovery device provided by the utility model can control the chloromethane content of the high-altitude exhaust gas to be below 0.002 percent, and reach the gas phase environmental protection emission standard; meanwhile, the method is beneficial to recovering the methyl chloride gas in the methyl chloride tail gas, and reduces the material loss.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural view of a methyl chloride tail gas recovery device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a methyl chloride tail gas recovery unit, include:
a steam supply device;
a dry gas supply device;
an adsorption/desorption device; the adsorption and desorption device is provided with a steam inlet, a dry gas inlet and a chloromethane tail gas inlet; the steam inlet is communicated with the steam outlet of the steam supply device; the dry air inlet is communicated with an air outlet of the dry air supply device; the methyl chloride tail gas inlet is communicated with an exhaust port of a methyl chloride recovery system;
a condensing unit; the air inlet of the condensing device is communicated with the air outlet of the adsorption and desorption device; and the non-condensable gas exhaust port of the condensing device is communicated with the gas inlet of the chloromethane recovery system;
a condensate receiving tank; the liquid inlet of the condensate receiving tank is communicated with the liquid outlet of the condensing device;
the adsorption and desorption device comprises more than two adsorption and desorption tanks which are connected in parallel;
the adsorption and desorption tank is a tank body filled with an adsorbent.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a methyl chloride tail gas recovery device according to an embodiment of the present invention; wherein, 1 is an adsorption and desorption device which comprises two adsorption and desorption tanks connected in parallel, 1a is a first adsorption and desorption tank, and 1b is a second adsorption and desorption tank; 2 is a steam supply device; 3 is a dry gas supply device; 4 is a condensing device; 5 is a condensate receiving tank; and 6 is a methyl chloride recovery system.
The adsorption and desorption device 1 is used for absorbing and desorbing the chloromethane tail gas, and the adsorption and desorption device 1 comprises more than two adsorption and desorption tanks which are connected in parallel; each adsorption and desorption tank is a tank body filled with an adsorbent. In some embodiments of the present invention, the tank body is a metal tank.
The operation and treatment process of the adsorption and desorption device is described by taking the example that the adsorption and desorption device comprises two adsorption and desorption tanks: the two adsorption and desorption tanks are in parallel connection, and are used for alternately carrying out adsorption and desorption treatments, namely, the two adsorption and desorption tanks are alternately used as the adsorption tank and the desorption tank. Specifically, the methyl chloride tail gas is introduced into the first adsorption and desorption tank 1a, the adsorbent in the tank adsorbs the methyl chloride in the tail gas, after the adsorption is saturated, the air inlet channel of the first adsorption and desorption tank 1a is closed, the methyl chloride tail gas air inlet channel of the second adsorption and desorption tank 1b is opened, so that the methyl chloride tail gas enters the second adsorption and desorption tank 1b, and the methyl chloride component in the methyl chloride tail gas is continuously adsorbed. In some embodiments of the present invention, the temperature of the adsorption is 25 to 40 ℃.
The utility model discloses an in other embodiments, adsorb desorption device includes the mutual parallelly connected absorption desorption jar more than 3, adsorbs in turn each other and desorbs the processing, and concrete operation is with last, and 3 jar bodies switch over in proper order and use.
The utility model discloses an in some embodiments, all be provided with methyl chloride tail gas governing valve on every methyl chloride tail gas intake pipeline that adsorbs desorption jar, through opening and closing of the corresponding methyl chloride tail gas intake pipeline of methyl chloride tail gas governing valve control makes each adsorb desorption jar and lets in methyl chloride tail gas in turn and adsorb the processing.
In some embodiments of the present invention, the chloromethane tail gas inlet of the adsorption and desorption device 1 is disposed at the lower part or bottom of each adsorption and desorption tank; in a preferred embodiment, at the bottom.
In some embodiments of the present invention, the methyl chloride tail gas inlet of the adsorption and desorption device 1 is communicated with the exhaust port of the methyl chloride recovery system 6 (see fig. 1). The present invention has no special limitation on the methyl chloride recovery system 6, and is a conventional methyl chloride recovery system known to those skilled in the art, such as a drying-compression condensation recovery system, a drying-absorption rectification recovery system, etc. Because the recovery rate of the methyl chloride recovery system in the prior art is poor, the content of the methyl chloride in the discharged tail gas is still high after recovery treatment, and material loss and environmental pollution are caused. Insert behind current chloromethane recovery system the utility model discloses a tail gas recovery unit can further carry out recovery processing to current chloromethane recovery system exhaust tail gas, improves the rate of recovery of chloromethane, reduces the material loss to make the exhaust reach the environmental protection and discharge the requirement.
In some embodiments of the present invention, the recovery device further comprises a methyl chloride tail gas fan 7, and the adsorption/desorption device 1 is communicated with the methyl chloride recovery system 6 through the methyl chloride tail gas fan 7 (see fig. 1).
In some embodiments of the present invention, each adsorption and desorption tank is independently selected from an activated carbon adsorption and desorption tank (i.e., the filler in the tank is activated carbon), a molecular sieve adsorption and desorption tank (i.e., the filler in the tank is molecular sieve), or a silica gel adsorption and desorption tank (i.e., the filler in the tank is silica gel). The utility model discloses an in the embodiment, adsorb desorption device includes two adsorption desorption jars that connect in parallel each other, and every adsorption desorption jar is activated carbon adsorption desorption jar.
The steam outlet of the steam supply device 2 is communicated with the steam inlet of the adsorption and desorption device 1 and is used for introducing steam into the adsorption and desorption tank which is saturated in adsorption in the adsorption and desorption device 1 so as to desorb the adsorbent and release the adsorbed high-content chloromethane gas.
The operation and treatment process of the adsorption and desorption device is described by taking the example that the adsorption and desorption device comprises two adsorption and desorption tanks: and (3) introducing the methyl chloride tail gas into the first adsorption and desorption tank 1a, closing an air inlet channel of the first adsorption and desorption tank 1a after the adsorbent in the tank adsorbs the methyl chloride in the tail gas to saturation, opening a methyl chloride tail gas inlet channel of the second adsorption and desorption tank 1b, and continuously adsorbing the methyl chloride component in the methyl chloride tail gas. And opening a steam inlet channel of the first adsorption and desorption tank 1a while the second adsorption and desorption tank 1b carries out adsorption treatment, leading steam into the first adsorption and desorption tank 1a, realizing desorption of the adsorbent, releasing and collecting methyl chloride components, and enabling the desorbed first adsorption and desorption tank 1a to be used as an adsorption tank for standby again. After the second adsorption and desorption tank 1b is saturated in adsorption, closing the methyl chloride tail gas inlet channel, opening the methyl chloride tail gas inlet channel of the first adsorption and desorption tank 1a, and carrying out adsorption treatment again by using the desorbed first adsorption and desorption tank 1 a; meanwhile, a steam inlet channel of the second adsorption and desorption tank 1b is opened, steam is introduced for the same desorption treatment, and the adsorption tank can be used for standby after the desorption is finished. So, two absorption desorption jars adsorb and desorb in proper order in turn, realize the continuous recovery processing to methyl chloride tail gas, equipment and easy operation, and can reach the effect of high-efficient recovery.
In other embodiments of the present invention, the adsorption/desorption apparatus includes more than 3 adsorption/desorption tanks connected in parallel to each other, and the adsorption/desorption processes are alternately performed, and the specific operation is the same as above. In some embodiments of the present invention, the temperature of the desorption is 110 to 130 ℃.
In some embodiments of the present invention, the steam inlet is provided at the upper portion or the top of each adsorption/desorption tank in the adsorption/desorption apparatus 1.
The utility model discloses an in some embodiments, all be provided with steam control valve on every steam admission pipeline that adsorbs desorption jar, through opening and closing of corresponding steam admission pipeline of steam control valve control makes each adsorb desorption jar and lets in steam in turn and carry out desorption processing.
In some embodiments of the present invention, the adsorption and desorption device 1 is further provided with a high-altitude exhaust port. Specifically, all be provided with the high altitude gas vent on every absorption desorption jar among the absorption analytical equipment 1, when every absorption desorption jar acted as the adsorption jar and carries out the adsorption operation, the purge gas after the absorption was discharged through this high altitude gas vent, simultaneously, detect the methyl chloride content in the exhaust of high altitude gas vent, reach the settlement upper limit of its content after, switch to another absorption desorption jar promptly and carry out the absorption processing, present absorption desorption jar is regarded as the absorption and is reached the saturation, the purge gas after the absorption is whole to be discharged through this high altitude gas vent in the present jar body, make exhaust gas reach environmental protection emission requirement.
In some embodiments of the present invention, the high altitude vent is disposed at the top of each adsorption and desorption tank.
The utility model discloses an in some embodiments, all be provided with discharge valve on the blast pipe line of every high altitude gas vent, control opening and closing of corresponding exhaust pipe line through every discharge valve.
The air outlet of the dry air supply device 3 is communicated with the dry air inlet of the adsorption and desorption device 1 and is used for feeding dry air into the adsorption and desorption tank desorbed in the adsorption and desorption device 1 so as to cool and dry the adsorbent in the tank body, and the adsorption and desorption tank is used as an adsorption tank for standby after cooling and drying.
The utility model discloses an in some embodiments, all be provided with the dry gas governing valve on every dry gas intake pipeline that adsorbs desorption jar, through opening and closing of the corresponding dry gas intake pipeline of dry gas governing valve control makes each adsorb desorption jar and lets in dry gas in turn and cool down the drying. In some embodiments of the present invention, the temperature of the absorbent is reduced to 25-40 ℃ by the drying gas.
In some embodiments of the present invention, the dry gas inlet is provided in the lower part or bottom of each adsorption/desorption tank in the adsorption/desorption apparatus 1. In a preferred embodiment, the dry gas inlet is arranged at the bottom of the adsorption and desorption tank.
In some embodiments of the utility model, methyl chloride tail gas recovery unit still includes dry gas fan 8, through dry gas fan 8 is linked together dry gas air feeder 3 and adsorption and desorption device 1, sends into the dry gas in the dry gas air feeder 3 and adsorbs desorption device 1.
The air inlet of the condensing device 4 is communicated with the air outlet of the adsorption and desorption device 1 and is used for condensing the chloromethane gas desorbed and released from the adsorption and desorption device 1.
In some embodiments of the present invention, the gas outlet of the adsorption/desorption apparatus 1 is disposed at the bottom of each adsorption/desorption tank.
In some embodiments, a chloromethane vent valve is disposed on the gas outlet pipeline of each adsorption/desorption tank, and the opening and closing of the gas outlet pipeline of each adsorption/desorption tank is controlled by the chloromethane vent valve, specifically, when one adsorption/desorption tank is in an adsorption operation state, the vent valve on the chloromethane gas outlet pipeline is in a closed state, when the adsorption/desorption tank is switched to a desorption operation state, the vent valve is opened to discharge chloromethane gas released by desorption through the gas outlet pipeline, the discharged gas enters a condensing device to be condensed, wherein a condensate is collected, and the non-condensable gas of chloromethane is sent to a chloromethane recovery system again to be recovered.
In some embodiments of the present invention, the non-condensable gas exhaust port of the condensing device 4 is communicated with the methyl chloride recovery system 6, and the non-condensable gas of the methyl chloride condensed by the condensing device 4 is sent into the methyl chloride recovery system 6 again to recover the methyl chloride.
In some embodiments of the present invention, the condensing device 4 is a one-stage condenser. In some embodiments of the present invention, the condenser is a vertical condenser.
A liquid inlet of the condensate receiving tank 5 is communicated with a liquid outlet of the condensing device 4 and is used for receiving steam condensate which is condensed by the condensing device 4 and then is discharged; utilize steam when will adsorbing the methyl chloride desorption of desorption jar interior absorption promptly, methyl chloride desorbs from the adsorbent, and intercommunication steam together discharges from adsorbing the desorption jar, after condensing 4, the steam condensation gets off and collects to the condensate receiving tank 5 in, and methyl chloride noncondensable gas is sent back to methyl chloride recovery system 6 again, carries out the recovery of methyl chloride again to realize the circulation with the methyl chloride tail gas that current methyl chloride recovery system discharged and retrieve, and the utility model discloses a recovery unit exhaust accords with gaseous phase environmental protection requirement for the qualified gas after the purification.
Through the utility model provides an above-mentioned methyl chloride tail gas recovery unit can effectively retrieve the methyl chloride composition in the methyl chloride tail gas, has both improved the material utilization in the methyl chloride waste gas, makes waste gas reach gaseous phase environmental protection emission standard again.
For further understanding of the present invention, preferred embodiments of the present invention will be described below with reference to examples, but it should be understood that these descriptions are only for the purpose of further illustrating the features and advantages of the present invention, and are not intended to limit the claims of the present invention.
In the following examples, the methyl chloride off-gas recovery apparatus shown in fig. 1 was used for the recovery treatment. In the apparatus shown in fig. 1, the methyl chloride recovery system 6 is a condensation process recovery apparatus in the text "comparison of the method for deeply recovering methyl chloride in tail gas", and the content of methyl chloride in the discharged methyl chloride tail gas is 6.2%. Each adsorption/desorption tank of the adsorption/desorption apparatus 1 is filled with an activated carbon adsorbent.
Example 1
S1, sending the methyl chloride tail gas from the methyl chloride recovery system 6 into the first adsorption and desorption tank 1a through a methyl chloride tail gas fan 7, carrying out adsorption treatment, wherein the adsorption temperature is 25-35 ℃, detecting the methyl chloride content of the gas discharged from the high-altitude exhaust port at the top of the tank body, and switching to the second adsorption and desorption tank 1b for adsorption treatment after the upper limit value (0.002%) is reached.
S2, in the process of performing the adsorption treatment on the second adsorption/desorption tank 1b, the first adsorption/desorption tank 1a performs the desorption treatment, which is specifically as follows: and (3) introducing steam into the first adsorption and desorption tank 1a for high-temperature desorption, wherein the desorption temperature is 110-120 ℃, the desorbed gas enters the condenser 4 for condensation, the condensate enters the condensate receiving tank 5, the condensed water in the receiving tank 5 can be directly subjected to sewage treatment, and the non-condensable gas is returned to the methyl chloride recovery system 6 for recovering the desorbed methyl chloride again.
And stopping introducing steam after desorption is finished, starting a dry air fan 8, sending dry air into the first adsorption and desorption tank 1a to cool and dry the adsorbent in the tank body, stopping air supply of the fan when the temperature is reduced to 25-30 ℃, and taking the first adsorption and desorption tank 1a as an adsorption tank for later use again.
And S3, carrying out the same desorption operation and drying operation after the second adsorption and desorption tank 1b finishes adsorption, and realizing continuous recovery treatment of the chloromethane tail gas.
Example 2
S1, sending the methyl chloride tail gas from the methyl chloride recovery system 6 into the first adsorption and desorption tank 1a through a methyl chloride tail gas fan 7, carrying out adsorption treatment, wherein the adsorption temperature is 25-35 ℃, detecting the methyl chloride content of the gas discharged from the high-altitude exhaust port at the top of the tank body, and switching to the second adsorption and desorption tank 1b for adsorption treatment after the content reaches an upper limit value (0.001%).
S2, in the process of performing the adsorption treatment on the second adsorption/desorption tank 1b, the first adsorption/desorption tank 1a performs the desorption treatment, which is specifically as follows: and (3) introducing steam into the first adsorption and desorption tank 1a for high-temperature desorption, wherein the desorption temperature is 110-120 ℃, the desorbed gas enters the condenser 4 for condensation, the condensate enters the condensate receiving tank 5, the condensed water in the receiving tank 5 can be directly subjected to sewage treatment, and the non-condensable gas is returned to the methyl chloride recovery system 6 for recovering the desorbed methyl chloride again.
And stopping introducing steam after desorption is finished, starting a dry air fan 8, sending dry air into the first adsorption and desorption tank 1a to cool and dry the adsorbent in the tank body, stopping air supply of the fan when the temperature is reduced to 25-30 ℃, and taking the first adsorption and desorption tank 1a as an adsorption tank for later use again.
And S3, carrying out the same desorption operation and drying operation after the second adsorption and desorption tank 1b finishes adsorption, and realizing continuous recovery treatment of the chloromethane tail gas.
The embodiment can show that the chloromethane tail gas recovery device provided by the utility model can control the chloromethane content of the high-altitude exhaust gas to be below 0.002 percent, and reach the gas phase environmental protection emission standard; meanwhile, the method is beneficial to recycling the methyl chloride gas in the methyl chloride tail gas, and reduces the material loss.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a methyl chloride tail gas recovery unit which characterized in that includes:
a steam supply device;
a dry gas supply device;
an adsorption/desorption device; the adsorption and desorption device is provided with a steam inlet, a dry gas inlet and a chloromethane tail gas inlet; the steam inlet is communicated with the steam outlet of the steam supply device; the dry air inlet is communicated with an air outlet of the dry air supply device; the methyl chloride tail gas inlet is communicated with an exhaust port of a methyl chloride recovery system;
a condensing unit; the air inlet of the condensing device is communicated with the air outlet of the adsorption and desorption device; and the non-condensable gas exhaust port of the condensing device is communicated with the gas inlet of the chloromethane recovery system;
a condensate receiving tank; the liquid inlet of the condensate receiving tank is communicated with the liquid outlet of the condensing device;
the adsorption and desorption device comprises more than two adsorption and desorption tanks which are connected in parallel;
the adsorption and desorption tank is a tank body filled with an adsorbent.
2. The methyl chloride tail gas recovery device according to claim 1, wherein a methyl chloride tail gas regulating valve is arranged on a methyl chloride tail gas inlet pipeline of each adsorption desorption tank;
a steam regulating valve is arranged on a steam inlet pipeline of each adsorption and desorption tank;
and a dry gas regulating valve is arranged on the dry gas inlet pipeline of each adsorption and desorption tank.
3. The methyl chloride tail gas recovery device of claim 1, further comprising a dry gas blower;
the dry gas supply device is communicated with the adsorption and desorption device through the dry gas fan.
4. The methyl chloride tail gas recovery device of claim 1, further comprising a methyl chloride tail gas fan;
and the adsorption and desorption device is communicated with the methyl chloride recovery system through the methyl chloride tail gas fan.
5. The methyl chloride tail gas recovery device of claim 1, wherein each adsorption and desorption tank is independently selected from an activated carbon adsorption and desorption tank, a molecular sieve adsorption and desorption tank or a silica gel adsorption and desorption tank.
6. The methyl chloride tail gas recovery device of claim 1, wherein the steam inlet is disposed at an upper portion or a top portion of each adsorption desorption tank.
7. The methyl chloride tail gas recovery device of claim 1 or 6, wherein the dry gas inlet is disposed at a lower portion or bottom of each adsorption and desorption tank.
8. The methyl chloride tail gas recovery device of claim 1 or 6, wherein the methyl chloride tail gas inlet is disposed at a lower portion or bottom of each adsorption desorption tank.
9. The methyl chloride tail gas recovery device of claim 1, wherein the adsorption and desorption device comprises two adsorption and desorption tanks connected in parallel with each other;
each adsorption and desorption tank is an activated carbon adsorption and desorption tank.
10. The methyl chloride tail gas recovery device of claim 1, wherein the adsorption and desorption device is further provided with an overhead vent.
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| CN201921899141.6U CN211025700U (en) | 2019-11-05 | 2019-11-05 | Methyl chloride tail gas recovery device |
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| CN201921899141.6U CN211025700U (en) | 2019-11-05 | 2019-11-05 | Methyl chloride tail gas recovery device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112675667A (en) * | 2020-12-31 | 2021-04-20 | 江苏爱姆欧光电材料有限公司 | Recovery and absorption system and method for chloromethane in alkyl metal production process |
| CN113532020A (en) * | 2021-07-28 | 2021-10-22 | 重庆天原化工有限公司 | Chloromethane compression system |
| CN115253582A (en) * | 2022-06-23 | 2022-11-01 | 浙江天成工程设计有限公司 | Method and system for recycling methyl chloride in Grignard reaction tail gas |
-
2019
- 2019-11-05 CN CN201921899141.6U patent/CN211025700U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112675667A (en) * | 2020-12-31 | 2021-04-20 | 江苏爱姆欧光电材料有限公司 | Recovery and absorption system and method for chloromethane in alkyl metal production process |
| CN113532020A (en) * | 2021-07-28 | 2021-10-22 | 重庆天原化工有限公司 | Chloromethane compression system |
| CN115253582A (en) * | 2022-06-23 | 2022-11-01 | 浙江天成工程设计有限公司 | Method and system for recycling methyl chloride in Grignard reaction tail gas |
| CN115253582B (en) * | 2022-06-23 | 2024-06-14 | 浙江天成工程设计有限公司 | Method and system for recycling chloromethane in Grignard reaction tail gas |
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