CN208762463U - The recovery system of coal tar in a kind of pyrolysis coal gas - Google Patents
The recovery system of coal tar in a kind of pyrolysis coal gas Download PDFInfo
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- CN208762463U CN208762463U CN201822226536.1U CN201822226536U CN208762463U CN 208762463 U CN208762463 U CN 208762463U CN 201822226536 U CN201822226536 U CN 201822226536U CN 208762463 U CN208762463 U CN 208762463U
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Abstract
The utility model relates to coal tar recovering fields, are related to a kind of recovery system for being pyrolyzed coal tar in coal gas, comprising: a grade cooling tower, for recycling heavy coal tar therein；Heat exchanger, shell side are connected with the outlet of a grade cooling tower, and the heat transferring medium in coal gas and tube side from a grade cooling tower exchanges heat with the heat in gas recovery；Two grade cooling towers are connected with the shell-side outlet of heat exchanger, and the first inversely spraying device is provided in two grade cooling towers, to recycle light tar therein to the coal gas shower spray of solvent from heat exchanger；Solvent evaporator, heating element is arranged inside, heating element is connected with the tube side of heat exchanger, so that heat transferring medium enters in heating element as heat source, solvent evaporator is communicated with two grade cooling towers, carries out heating evaporation to the solvent sprayed out in two grade cooling towers by heating element to be recycled.The heat in pyrolysis coal gas has rationally been recycled, the thermal efficiency of pyrolytic process of coal is improved.
Description
Technical field
The utility model relates to coal tar recovering technical fields, and in particular to a kind of recycling system for being pyrolyzed coal tar in coal gas
System.
Background technique
Pyrolysis of coal industry belongs to the energy resource flow industry newly risen, and pyrolysis of coal refers to that in the absence of air conditions, coal exists
The complex process of a series of physical, chemical change that occur under different temperatures, usually during pyrolysis of coal, in production semi-coke
A large amount of raw coke oven gas can be also generated simultaneously, while containing the chemical products such as middle coalite tar, crude benzol, pyridine, naphthalene in raw coke oven gas.
In traditional coal pyrolytic gasified technique, generallys use and raw gas is directly condensed and the mode of oil wash recycles
Tar, wherein first pass through a large amount of water and contacted with raw gas, the higher heavy tar of boiling point is condensed out, herein
Waste water largely containing tar can be generated in the process, then recycles the similar principle that mixes, using washing oil to carrying in raw gas
Tar light oil adsorbed, then by heating desorption recycle tar light oil, in the process, the waste heat of raw gas does not have substantially
Recycle, a large amount of sensible heats contained by raw gas are wasted, can not the reasonable high efficiente callback part heat, affect various coals
The thermal efficiency of pyrolytic process.
Utility model content
Therefore, the technical problem to be solved by the present invention is to overcome the waste heat of raw gas in the prior art not have substantially
There are recycling, the defect that a large amount of sensible heats contained by raw gas are wasted, to provide a kind of time for being pyrolyzed coal tar in coal gas
Receipts system.
To solve above-mentioned technical proposal, the technical solution adopted in the utility model are as follows:
The recovery system of coal tar in a kind of pyrolysis coal gas, comprising:
One grade cooling tower is connected with the outlet of pyrolysis oven, therein to recycle for condensing the coal gas from pyrolysis oven
Heavy coal tar；
Heat exchanger, including shell side and tube side, the shell side are connected with the outlet of a grade cooling tower, cold from the level-one
But the heat transferring medium in the coal gas of tower and the tube side exchanges heat, with the heat in gas recovery；
Two grade cooling towers are connected with the shell-side outlet of heat exchanger, and it is reverse that first is provided at the top of two grade cooling towers
Spray equipment, to recycle light tar therein to the coal gas shower spray of solvent from heat exchanger；
Solvent evaporator, including heating element in the inner, the tube side phase of the heating element and the heat exchanger is arranged
Connection, so that heat transferring medium enters as heat source in heating element, and the solvent evaporator is connected with two grade cooling towers, with
Heating evaporation is carried out to be recycled to the solvent sprayed out in two grade cooling towers by the heating element.
Further, the recovery system further includes condensation, described condensation one end and the solvent evaporator
Outlet be connected, the other end is connected with the entrance of the described first inversely spraying device, for by solvent evaporator steam
The solvent of hair condense and is delivered to the first inversely spraying device again.
Further, the condensation includes:
Water cooler, entrance are connected with the outlet of solvent evaporator；And
Solvent refrigeration machine, entrance are connected with the outlet of the water cooler, outlet and the first inversely spraying device
Entrance is connected.
Further, the recovery system further includes,
Second inversely spraying device is set in a grade cooling tower；
Light tar storage tank, oil inlet end are connected to the heating element, to recycle light tar, and oil outlet and institute
State the second inversely spraying device connection.
Further, the recovery system further includes,
Light tar recycling can, oil-inlet end are connected to the shell side of the solvent evaporator and the heat exchanger respectively,
Oil outlet is connected to the tube side of the heat exchanger.
Further, the recovery system further includes,
Adsorbent equipment is connected with the gas exit of two grade cooling tower, and the adsorbent equipment is provided with semicoke, is used for
The band oil solvent carried in absorption coal gas.
Further, the recovery system further includes,
Cleaner is set between pyrolysis oven and a grade cooling tower, and be connected to the two.
Further, the heating element is heating coil.
Further, the heat transferring medium is light tar；
The solvent is acetone and/or toluene.
Technical solutions of the utility model have the advantages that
1. the recovery system of coal tar in pyrolysis coal gas provided by the utility model, by the way that heat exchanger, and past heat exchange is arranged
The tube side of device is passed through heat transferring medium, so that the heat in coal gas can pass when coal gas by the shell side of heat exchanger when being conveyed
It is handed to heat transferring medium, then heat transferring medium is passed through to again heat source of the heating element as solvent evaporator of solvent evaporator, made
The heat that must be pyrolyzed in coal gas is directly applied to solvent to evaporate and recycle, and has rationally recycled the heat in pyrolysis coal gas, has improved
The thermal efficiency of pyrolytic process of coal.
2. the recovery system of coal tar in pyrolysis coal gas provided by the utility model, by the way that light tar storage tank is arranged,
The heat transferring medium to have cooled down that heating element exports is delivered to the second inversely spraying device as cooling medium, so that gently again
The purposes of matter coal tar increases, and increases the utilization rate of light tar.
3. the recovery system of coal tar, is recycled by setting light tar in pyrolysis coal gas provided by the utility model
The light tar that one grade cooling tower and solvent evaporator export is stored and is delivered to heat exchanger tube pass entrance, made by tank
The heat transferring medium that can serve as heat exchanger again by the light tar that a grade cooling tower and solvent evaporator recycle is obtained, so that lightweight coal
Tar, which can be realized, to be recycled, and raw material has been saved.
4. the recovery system of coal tar in pyrolysis coal gas provided by the utility model, by selecting acetone and/or toluene to make
Boiling point for solvent, both solvents is all lower, can be sufficiently separated in solvent evaporator with the coal tar of recycling, so that
Cycling and reutilization may be implemented in solvent, has saved raw material, reduces cost recovery.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram that the recovery system of coal tar in coal gas is pyrolyzed in the embodiments of the present invention 1.
Description of symbols:
1, pyrolysis oven；2, cleaner；3, a grade cooling tower；31, the second inversely spraying device；4, heat exchanger；5, second level
Cooling tower；51, the first inversely spraying device；6, adsorbent equipment；7, solvent evaporator；71, heating element；8, light tar stores up
Tank；9, light tar recycling can；10, water cooler；11, solvent refrigeration machine.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular
Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term " the
One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
In addition, as long as technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can be combined with each other.
Embodiment 1
As shown in Figure 1, the present embodiment is related to a kind of recovery system for being pyrolyzed coal tar in coal gas, comprising: a grade cooling tower
3, heat exchanger 4, two grade cooling towers 5 and solvent evaporator 7.
One grade cooling tower 3 is connected with the outlet of pyrolysis oven 1, and a grade cooling tower 3 is for condensing the coal gas from pyrolysis oven 1
To recycle heavy coal tar therein, heat exchanger 4 includes shell side and tube side, wherein shell side is connected with the outlet of a grade cooling tower 3
Logical, circulation has heat transferring medium in tube side, and the heat transferring medium in coal gas and tube side from a grade cooling tower 3 exchanges heat, thus
Heat in coal gas is recycled, two grade cooling towers 5 are connected with the shell-side outlet of heat exchanger 4, the top of two grade cooling towers 5
Be provided with the first inversely spraying device 51, the first inversely spraying device 51 be used for the coal gas shower spray of solvent from heat exchanger 4 from
And light tar therein is recycled, solvent evaporator 7 is connected with two grade cooling towers 5, and heating is provided in solvent evaporator 7
Component 71 carries out heating evaporation to the solvent sprayed out in two grade cooling towers 5 by heating element 71 to recycle, is somebody's turn to do
Heating element 71 is connected with the tube side of heat exchanger 4, and the heat transferring medium in heat exchanger 4 after heat exchange operation is finally circulated to
Heat source is used as in heating element 71.
In the present embodiment, heating element 71 is heating coil, and in other embodiments, heating element 71 is also possible to add
Hot U-tube.In the present embodiment, solvent is acetone, and in other embodiments, solvent is also possible to the mixed of toluene or acetone and toluene
Close liquid.
The present embodiment is passed through heat transferring medium by setting heat exchanger 4, and toward the tube side of heat exchanger 4, so that when coal gas is logical
When crossing the shell side of heat exchanger 4 and being conveyed, the heat in coal gas can be transferred to heat transferring medium, then again be passed through heat transferring medium molten
Heat source of the heating element 71 of agent evaporator 7 as solvent evaporator 7, so that the heat in pyrolysis coal gas is directly applied to molten
Agent evaporation recycling, has rationally recycled the heat in pyrolysis coal gas, has improved the thermal efficiency of pyrolytic process of coal.
To save raw material, it is additionally provided with condensation in the present embodiment, condensation one end goes out with solvent evaporator 7
Mouth is connected, and the other end is connected with the entrance of the first inversely spraying device 51, and condensation is used for by solvent evaporator 7
The solvent of evaporation condense and is delivered to the first inversely spraying device 51 again.
Condensation includes water cooler 10 and solvent refrigeration machine 11, the entrance and solvent evaporator 7 of water cooler 10
Outlet be connected, the entrance of solvent refrigeration machine 11 is connected with the outlet of water cooler 10, outlet with the first inversely spraying dress
51 entrance is set to be connected, by the solvent that 7 heating evaporation of solvent evaporator goes out initially enter water cooler 10 cool down it is cold
But it then enters back into solvent refrigerant to be condensed, finally be passed through again again to the first inversely spraying device 51, so that molten
Agent can be in the first inversely spraying device 51, two grade cooling towers 5, solvent evaporator 7, water cooler 10 and solvent refrigerant it
Between formed circulation, thus achieve the purpose that save raw material.
In the present embodiment, recovery system further includes the second inversely spraying device 31 and light tar storage tank 8, and second
The inside of a grade cooling tower 3 is arranged in inversely spraying device 31, and the oil inlet end and heating element 71 of light tar storage tank 8 connect
It is logical, to recycle light tar, in the present embodiment, by the oil outlet of light tar storage tank 8 and the second inversely spraying device
31 are connected to, so that the light tar that exports of slave heating element 71 stored by lightweight coking coal oil tank again can be from the
In two inversely spraying devices 31 spray to pair and cooling tower in coal gas cool down so that the purposes of light tar increases
Add, increases the utilization rate of raw material.
Recovery system further includes light tar recycling can 9, and the oil-inlet end of light tar recycling can 9 is steamed with solvent respectively
Hair device 7 is connected to the shell side of heat exchanger 4, and oil outlet is connected to the tube side of heat exchanger 4, so that via 7 He of solvent evaporator
The tube side that the lightweight coking coal oil that heat exchanger 4 recycles can be delivered to heat exchanger 4 again has saved raw material as heat transferring medium.
In the present embodiment, it is also communicated with adsorbent equipment 6 in the gas exit of two grade cooling towers 5, adsorbent equipment 6 is provided with
Semicoke, for adsorbing the band oil solvent carried in coal gas to purifying to coal gas, pyrolysis oven 1 and a grade cooling tower 3 it
Between be additionally provided with cleaner 2, cleaner 2 is connected to simultaneously with pyrolysis oven 1 and a grade cooling tower 3, thus to the powder in coal gas
Dirt is recycled, and prevents the dust in coal gas from accumulating and occluding device in subsequent operation.
The recovery process of the present embodiment is as described below:
The coal gas that pyrolysis oven 1 generates, which is passed first into cleaner 2, to be dusted, and is then passed through a grade cooling tower 3 again
In, the second inversely spraying device 31 sprays out light tar to coal gas, to condense to coal gas, by the heavy in coal gas
Coal tar is recycled, and coal gas is passed through again in the shell side of heat exchanger 4 later, and coal gas is situated between in heat exchanger 4 with the heat exchange in tube side
Matter exchanges heat, thus in coal gas heat and small part light tar recycle, the lightweight recycled by heat exchanger 4
Coal tar is delivered in light tar recycling can 9 and is stored, and the coal gas for passing through heat exchange operation is then delivered to second level cooling
Tower 5 is recycled again, and heat transferring medium is delivered to solvent evaporator 7, as the heat source of heating element 71 in solvent evaporator 7,
Two grade cooling towers 5 by the first inversely spraying device 51 to coal gas shower spray of solvent, thus by coal gas pairs of light tar into
Row recycling, the light tar of two grade cooling towers 5 output and the mixed liquor of solvent are transported in solvent evaporator 7, in solvent
In evaporator 7, solvent, which is heated evaporation and is then sent in water cooler 10, to be cooled down, then is delivered to the progress of solvent refrigerant
Refrigeration is finally transmitted back to the first inversely spraying device 51 as new solvent, and the lightweight coal after the purification of solvent evaporator 7
Tar is then delivered in light tar recycling can 9 again and is stored, and can be delivered to again in the tube side of heat exchanger 4 as heat exchange
Medium uses, and the light tar used as heat transferring medium is light via being transported to after heat exchanger 4 and heating element 71
Matter coal tar oil tank 8 is stored, and can be delivered to the second inversely spraying component again for recycling heavy coal tar.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes among the protection scope created still in the utility model.
Claims (9)
1. the recovery system of coal tar in a kind of pyrolysis coal gas characterized by comprising
One grade cooling tower (3) is connected with the outlet of pyrolysis oven (1), for condensing the coal gas from pyrolysis oven (1) to recycle it
In heavy coal tar；
Heat exchanger (4), including shell side and tube side, the shell side are connected with the outlet of a grade cooling tower (3), come from the level-one
The coal gas of cooling tower (3) and the heat transferring medium in the tube side exchange heat, with the heat in gas recovery；
Two grade cooling towers (5) are connected with the shell-side outlet of heat exchanger (4), and are provided with first at the top of two grade cooling towers (5)
Inversely spraying device (51), to recycle light tar therein to the coal gas shower spray of solvent from heat exchanger (4)；
Solvent evaporator (7), including heating element (71) in the inner, the heating element (71) and the heat exchanger is arranged
(4) tube side is connected so that heat transferring medium enters in heating element (71) as heat source, and the solvent evaporator (7) with
Two grade cooling towers (5) are connected, to be added by the heating element (71) to the solvent sprayed out in two grade cooling towers (5)
Thermal evaporation is to be recycled.
2. recovery system according to claim 1, which is characterized in that the recovery system further includes condensation, described
Condensation one end is connected with the outlet of the solvent evaporator (7), the other end and the described first inversely spraying device (51)
Entrance be connected, for carrying out condensation to the solvent by solvent evaporator (7) evaporation and being delivered to the first reverse spray again
Shower device (51).
3. recovery system according to claim 2, which is characterized in that the condensation includes:
Water cooler (10), entrance are connected with the outlet of solvent evaporator (7)；And
Solvent refrigeration machine (11), entrance are connected with the outlet of the water cooler (10), outlet and the first inversely spraying dress
The entrance for setting (51) is connected.
4. recovery system according to claim 1, which is characterized in that the recovery system further includes,
Second inversely spraying device (31) is set in a grade cooling tower (3)；
Light tar storage tank (8), oil inlet end are connected to the heating element (71), to recycle heat transferring medium, and oil outlet with
Second inversely spraying device (31) connection.
5. recovery system according to claim 1, which is characterized in that the recovery system further includes,
Light tar recycling can (9), the oil-inlet end shell side with the solvent evaporator (7) and the heat exchanger (4) respectively
Connection, oil outlet are connected to the tube side of the heat exchanger (4).
6. recovery system according to claim 1, which is characterized in that the recovery system further includes,
Adsorbent equipment (6) is connected with the gas exit of two grade cooling tower (5), and the adsorbent equipment (6) is provided with half
Coke, for adsorbing the band oil solvent carried in coal gas.
7. recovery system according to claim 1, which is characterized in that the recovery system further includes,
Cleaner (2) is set between pyrolysis oven (1) and a grade cooling tower (3), and is connected to the two.
8. recovery system described in any one of -7 according to claim 1, which is characterized in that the heating element (71) is to add
Hot coil.
9. recovery system described in any one of -7 according to claim 1, which is characterized in that the heat transferring medium is lightweight coal
Tar；
The solvent is acetone and/or toluene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822226536.1U CN208762463U (en) | 2018-12-27 | 2018-12-27 | The recovery system of coal tar in a kind of pyrolysis coal gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822226536.1U CN208762463U (en) | 2018-12-27 | 2018-12-27 | The recovery system of coal tar in a kind of pyrolysis coal gas |
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| Publication Number | Publication Date |
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| CN208762463U true CN208762463U (en) | 2019-04-19 |
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| CN201822226536.1U Active CN208762463U (en) | 2018-12-27 | 2018-12-27 | The recovery system of coal tar in a kind of pyrolysis coal gas |
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| CN (1) | CN208762463U (en) |
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2018
- 2018-12-27 CN CN201822226536.1U patent/CN208762463U/en active Active
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