CN218321251U - Coke oven gas circulation washing purifier - Google Patents

Abstract

The utility model discloses a coke oven gas circulation washing purifier, include: the coke oven gas purification tower comprises a tower body, wherein the tower body is provided with an inlet and an outlet of coke oven gas, the inlet is arranged at the bottom end of the tower body, and the outlet is arranged at the top end of the tower body; the reflux plate group comprises a plurality of reflux plates, and the reflux plates are fixedly arranged in the inner cavity of the tower body and provided with reflux holes; the washing liquid outlet is positioned below the reflux plate set, and the washing liquid reflux port is positioned above the reflux plate set; the circulating device is positioned on the outer side of the tower body and is respectively communicated with the washing liquid outlet and the washing liquid backflow port through a pipeline, the washing liquid at the bottom of the tower body is conveyed to the top layer backflow plate, the backflow plate with holes is utilized to replace an original nozzle to spray for washing, the washing liquid and the coke oven gas can be fully mixed, and the condition that the spraying nozzle is blocked in the traditional spraying process is avoided.

Description

Coke oven gas circulation washing purifier

Technical Field

The utility model relates to a coke oven gas purifies the field, has specifically related to a coke oven gas circulation washing purifier.

Background

The coke oven gas is combustible gas obtained while producing coke and tar products in the coking process, and is a byproduct in the coking process. The main components of the coke oven gas are hydrogen, methane and carbon monoxide, and the coke oven gas can be used as heating fuel and fuel gas for steel rolling or used for power generation, pure hydrogen production and the like. The coke oven gas has very complex composition, contains high-boiling macromolecular substances such as benzene, naphthalene, tar, dust and the like besides conventional low-boiling-point gas components, and if the coke oven gas directly enters a compressor process, the impurities can be crystallized in equipment such as a compressor cylinder, an air valve, a cooler and the like, so that blockage is caused, and the compressor is stopped and cleaned due to failure. Therefore, the comprehensive resource utilization level of the coke oven gas is improved, and the key point is to carry out washing and purification treatment on the crude gas generated in the coking process.

In the prior art, the coke oven gas is generally washed and purified by circularly spraying by using a spraying layer with a nozzle, but solid particles carried in washing oil are gradually increased along with the increase of the number of circulation times, so that the nozzle is easily blocked, and a spraying head needs to be detached and washed or replaced, or a filtering treatment device for circulating washing oil needs to be additionally arranged. For example, chinese patent CN201921533033.7 discloses a "deoiling and decalcification tower and a coke oven gas production line comprising the same", which utilizes a spray mechanism with a nozzle in a spray chamber to spray and wash the entering coke oven gas to remove impurities, and wash oil is communicated with an oil tank through a drain pipe and an oil pump to realize the recycling of the wash oil; chinese patent CN202022724383.0 discloses a coke oven gas naphthalene washing and dust removing device, which utilizes a spray head with a nozzle to spray circulating washing oil at the bottom of a shell to a filling section and a demister which absorb impurities and wash the filling section and the demister so as to reduce the accumulation of the impurities. However, both of the above methods have a problem that the nozzle is clogged with impurities in the cleaning liquid as the number of times of cleaning increases.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a coke oven gas circulation washing purifier replaces original nozzle to spray through utilizing foraminiferous backward flow board and washes, makes washing liquid and coke oven gas can the intensive mixing, avoids the tradition to spray the condition that the in-process sprays the nozzle and blocks up, improves washing efficiency.

Specifically, the utility model provides a coke oven gas circulation washing purifier, include:

the washing tower comprises a tower body, wherein a coke oven gas inlet, a coke oven gas outlet, a washing liquid outlet and a washing liquid backflow port are arranged on the tower body, the coke oven gas inlet is arranged at the bottom end of the tower body, the coke oven gas outlet is arranged at the top end of the tower body, the washing liquid outlet is positioned below the coke oven gas inlet, and the washing liquid backflow port is positioned below the coke oven gas outlet;

the reflux plate group is positioned between the washing liquid outlet and the washing liquid reflux port and comprises a plurality of reflux plates, and the reflux plates are fixedly arranged in the inner cavity of the tower body and provided with reflux holes;

circulating device, circulating device is located the tower body outside, through the pipeline respectively with the washing liquid export with washing liquid backward flow mouth intercommunication for follow the washing liquid of tower body bottom the washing liquid export is carried to washing liquid backward flow mouth.

In some embodiments, the reflux plate is fixedly installed inside the tower body on one side, and a gap is left between the other side and the tower body.

In some embodiments, the gap of the upper layer is located on opposite sides of the tower body than the gap of the lower layer.

In some embodiments, the backflow plate set further includes a plurality of down-flow plates, the down-flow plates are fixedly installed on one side of the backflow plates, the upper ends of the down-flow plates are slightly higher than the backflow plates to form overflow weirs, and the number of the down-flow plates corresponds to the number of the backflow plates.

In some embodiments, the angle between the return plate and the inner wall surface of the tower is 75-90 °.

In some embodiments, the open rate of the reflux plate is 10% -60%, and the shape of the reflux holes is round and/or square.

In some embodiments, the circulation device comprises a first circulation pump and a second circulation pump, wherein the first ends of the first circulation pump and the second circulation pump are connected with the washing liquid outlet, and the second ends are connected with the washing liquid return port and the outer end waste water discharge port.

In some embodiments, a special plate set demister and a fiber bed demister are further installed in the tower body, the special plate set demister is located above the return plate set, the fiber bed demister is located above the special plate set demister, the special plate set demister can be used for absorbing liquid drops and impurities larger than a first preset size, the fiber bed demister can be used for absorbing liquid drops and impurities larger than a second preset size, and the second preset size is smaller than the first preset size.

In some embodiments, the first predetermined dimension is no greater than 8 μm and the second predetermined dimension is no greater than 1 μm.

In some embodiments, the coke oven gas recycling scrubbing and purifying apparatus further comprises:

the washing system comprises a washing water storage tank, a washing pump and a washing nozzle, wherein the washing water storage tank is provided with the washing pump, the washing pump is arranged outside the tower body and is connected with the washing water storage tank through a pipeline, the washing nozzle is arranged inside the tower body and close to the special plate group demister and the fiber bed demister, and the washing system is used for spraying washing water on the special plate group demister and the fiber bed demister.

The utility model discloses improved on current coke oven gas washing device, replaced original nozzle through utilizing foraminiferous backflow board group to spray and carry out the preliminary treatment to coke oven gas, impurity in the washing liquid is taken out the washing liquid through the circulating pump after exceeding certain concentration or tower body bottom washing liquid deposit liquid height reach the setting value simultaneously, trades into new washing liquid, improves washing efficiency.

Compared with the prior art, the utility model discloses one of following beneficial effect has at least:

1. the backflow plate group with the holes is used for replacing the nozzles to spray, the size of the backflow holes is larger than that of the nozzles, the backflow plate group is not easy to block under the condition that solid particle impurities are more in the washing liquid, the condition that production stopping cleaning is required due to impurity blocking is avoided, and the washing efficiency is improved.

2. In the washing process, washing liquid enters through a washing liquid backflow port above the backflow plate group and reversely flows with the coke oven gas flowing upwards through the backflow hole and the down-flow plate, so that the gas-liquid contact area and the contact time are increased, and the gas-liquid mixing is more sufficient.

3. Circulating device includes first circulating pump and second circulating pump, and the washing liquid outlet is all connected to its first end, and washing liquid backward flow mouth and outer end waste water drain are abandoned to the second end all, and after impurity content reached certain concentration in the washing liquid or after tower body bottom washing liquid deposit liquid height reached the setting value, can utilize the circulating pump to discharge it, send into effluent disposal system, and the flow can be improved on the one hand in setting up of two circulating pumps, and on the other hand can be as reserve when the trouble takes place.

Drawings

The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in conjunction with the accompanying drawings.

Fig. 1 is a flow chart of a pipeline meter of a tower body and a circulating device according to an embodiment of the present invention;

FIG. 2 is a flow chart of an embodiment of the present invention for flushing a system plumbing fixture;

fig. 3 is a schematic view of the top view structure of the reflux plate of the present invention.

The reference numbers illustrate:

a tower body 100, a washing liquid outlet 110, a washing liquid reflux port 120, a coke oven gas inlet 130, a coke oven gas outlet 140, a gap 150,

the circulation device 200, the first circulation pump 210, the second circulation pump 220,

a return plate group 300, a return plate 310, a return hole 311, a down-flow plate 320, an overflow weir 321,

the demister 400 for the special plate group is provided,

a fiber bed mist eliminator 500 is provided,

a flush system 600, a flush water tank 610, a flush pump 620, and a flush head 630.

Detailed Description

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In one embodiment, referring to the accompanying drawings 1 and 2 in the specification, the utility model provides a coke oven gas circulation washing and purifying device, which specifically comprises: the device comprises a tower body 100, a reflux plate group 300, a washing liquid outlet 110, a washing liquid reflux port 120 and a circulating device 200, wherein the tower body 100 is provided with a coke oven gas inlet 130 and a coke oven gas outlet 140, the coke oven gas inlet 130 is arranged at the bottom end of the tower body 100, and the coke oven gas outlet 140 is arranged at the top end of the tower body 100; the reflux plate group 300 comprises a plurality of reflux plates 310, the reflux plates 310 are fixedly arranged in the inner cavity of the tower body 100, and reflux holes 311 are formed in the reflux plates 310; the washing liquid outlet 110 is positioned below the return plate set 300, and the washing liquid return opening 120 is positioned above the return plate set 300; the circulating device 200 is located outside the tower body 100, and is respectively communicated with the washing liquid outlet 110 and the washing liquid return opening 120 through pipes, so as to convey the washing liquid at the bottom of the tower body 100 to the top layer return plate 310.

After entering the lower position of the tower body 100 from the coke oven gas inlet 130, the coke oven gas starts to flow upwards, and carries out reverse convection with the washing liquid entering the tower body 100 through the washing liquid backflow port 120, the backflow plate group 300 comprises a plurality of backflow plates 310, backflow holes 311 are formed in the backflow plates, and the washing liquid flows downwards after passing through the backflow plates 310, so that the coke oven gas is washed. After the gas phase and the liquid phase are contacted, high boiling point macromolecular substances in the coke oven gas are carried out by the washing liquid, and the coke oven gas is washed and purified. The circulating device 200 is respectively communicated with the cleaning liquid outlet 110 and the cleaning liquid return opening 120 on the tower body 100 through pipelines, the cleaning liquid at the bottom of the tower body 100 is conveyed to the top layer return plate 310 by the external circulating device 200, and the cleaning liquid sequentially passes through the return plates 310 at the lower part from the top layer return plate 310 and finally falls back to the bottom of the tower body 100, so that the coke oven gas entering can be circularly cleaned.

In an embodiment, referring to fig. 1 and fig. 2 of the specification, one side of the backflow plate 310 is fixedly installed inside the tower body 100, a gap 150 is left between the other side of the backflow plate and the tower body 100, and the gap 150 is used as a passage for flowing of the washing liquid, so that the washing liquid can flow more smoothly, and the situation that the washing liquid cannot flow down due to the fact that the pressure at the lower part of the backflow hole 311 is greater than the pressure at the upper part in the washing process is avoided.

In one embodiment, referring to fig. 1 of the specification, the gap 150 of the upper layer and the gap 150 of the lower layer are located on opposite sides in the tower body 100, and the washing liquid can fall from the upper layer return plate 310 to the lower layer return plate 310 through the gap 150, so that the path of the washing liquid passing on the return plate 310 is increased, and the washing liquid can be mixed with the coke oven gas more fully.

In one embodiment, referring to fig. 1 of the specification, the reflow board assembly 300 further includes a plurality of down-flow boards 320, the down-flow boards 320 are fixedly installed on one side of the reflow board 310, the upper ends of the down-flow boards 320 are slightly higher than the reflow board 310 to form overflow weirs 321, and the number of the down-flow boards 320 corresponds to the number of the reflow boards 310. By forming the overflow weir 321, each backflow plate 310 can store more washing liquid, so that the washing liquid can stay on the backflow plate 310 for a longer time, a large amount of washing liquid is prevented from directly flowing down from the edge of the backflow plate 310 during washing, the washing liquid is circulated each time to wash coke oven gas with a certain volume as much as possible, the gas amount which can be processed by the washing liquid in one circulation is increased, and the circulation frequency is reduced.

In one embodiment, the angle between the backflow plate 310 and the wall of the tower body 100 is 75 to 90 °, wherein preferably, the backflow plate 310 is vertically installed with the wall of the tower body 100, and the same backflow plate 310 can store more washing liquid when being vertically installed, and has a larger gas-liquid contact space.

In one embodiment, the opening ratio of the return plate 310 is 10% to 60%, and the return holes 311 are circular and/or square, so that the size of the return holes 311 is set according to the actual circulation amount of the washing liquid and the intake amount of the coke oven gas, in order to avoid the situation that the washing liquid cannot be sufficiently dispersed due to the excessively large return holes 311, the contact area with the coke oven gas is too small, and the washing is insufficient, or the situation that the return holes 311 are easily blocked due to the excessively small return holes 311.

In one embodiment, referring to FIG. 1 of the specification, the circulation device 200 comprises a first circulation pump 210, a second circulation pump 220, and the first and second circulation pumps 210 and 220 are connected to the washing liquid outlet 110 at first ends and to the washing liquid return port 120 and the outer-end waste water discharge port at second ends. When the impurity content in the washing liquid reaches a certain concentration or the height of the washing liquid at the bottom of the tower body 100 reaches a set value, the washing liquid is discharged through an outer-end waste water discharge port on an outlet bypass of the circulating pump and is sent to a waste water treatment system. The first and second circulation pumps 210 and 220 may be simultaneously turned on when circulating the washing liquid and discharging the washing waste liquid, or only one of them may be turned on, and the other may be used as a backup when a malfunction occurs.

In one embodiment, referring to fig. 1 of the specification, a special plate set demister 400 and a fiber bed demister 500 are further installed in the tower body 100, the special plate set demister 400 is located above the return plate set 300, the fiber bed demister 500 is located above the special plate set demister 400, the special plate set demister 400 can be used for absorbing liquid drops and impurities larger than a first preset size, the fiber bed demister 500 can be used for absorbing liquid drops and impurities larger than a second preset size, and the second preset size is smaller than the first preset size. The coke oven gas washed by the backflow plate group 300 is carried with liquid drops and partial impurities and needs to be further purified, the liquid drops and the impurities with the sizes larger than a first preset size can be absorbed by the special plate group demister 400, the liquid drops and the impurities with the sizes larger than a second preset size can be absorbed by the fiber bed demister 500, and the coke oven gas is further purified.

In one embodiment, the first predetermined dimension is no greater than 8 μm and the second predetermined dimension is no greater than 1 μm, both of which refer to the maximum diameter of the liquid and the impurities.

In an embodiment, referring to fig. 3 of the specification, the washing apparatus further includes a washing system 600, the washing system 600 includes a washing water storage tank 610, a washing pump 620 and a washing nozzle 630, the washing water storage tank 610 and the washing pump 620 are disposed outside the tower body 100, the washing pump 620 is connected to the washing water storage tank 610 and the washing nozzle 630 through a pipeline, and the washing nozzle 630 is disposed inside the tower body 100 and close to the special plate group demister 400 and the fiber bed demister 500, and is used for spraying washing water to the demisters, reducing the accumulation of impurities, and ensuring the efficient operation of the demisters. The washing wastewater falls back to the bottom of the tower body 100 and can be recycled as washing liquid.

To sum up, the utility model discloses an adopt the backflow board group that has the backward flow hole to replace the mode that the nozzle sprayed in the past to wash coke oven gas, make the washing liquid disperse behind the backward flow hole and come and contact with coke oven gas, and then reach the effect of preliminary gas washing, the size in backward flow hole is great simultaneously, and difficult emergence blocking phenomenon has improved washing efficiency, has realized one kind and can last to carry out the washing purifier who washes to coke oven gas.

It should be noted that the above embodiments can be freely combined as necessary. 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 improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The coke oven gas circulating, washing and purifying device is characterized by comprising:

the washing tower comprises a tower body, wherein a coke oven gas inlet, a coke oven gas outlet, a washing liquid outlet and a washing liquid backflow port are arranged on the tower body, the coke oven gas inlet is arranged at the bottom end of the tower body, the coke oven gas outlet is arranged at the top end of the tower body, the washing liquid outlet is positioned below the coke oven gas inlet, and the washing liquid backflow port is positioned below the coke oven gas outlet;

the reflux plate group is positioned between the washing liquid outlet and the washing liquid reflux port and comprises a plurality of reflux plates, and the reflux plates are fixedly arranged in the inner cavity of the tower body and are provided with reflux holes;

circulating device, circulating device is located the tower body outside, through the pipeline respectively with the washing liquid export with washing liquid backward flow mouth intercommunication for follow the washing liquid of tower body bottom the washing liquid export is carried to washing liquid backward flow mouth.

2. The coke oven gas circulating, washing and purifying device of claim 1, wherein one side of the reflux plate is fixedly arranged in the tower body, and a gap is reserved between the other side of the reflux plate and the tower body.

3. The coke oven gas circulating washing and purifying device of claim 2, wherein the gap of the upper layer and the gap of the lower layer are positioned on two opposite sides in the tower body.

4. The coke oven gas circulating, washing and purifying device of claim 1, wherein the reflux plate group further comprises a plurality of down-flow plates, the down-flow plates are fixedly installed on one side of the reflux plates, the upper ends of the down-flow plates are slightly higher than the reflux plates to form overflow weirs, and the number of the down-flow plates corresponds to the number of the reflux plates.

5. The coke oven gas circulating, washing and purifying device as claimed in claim 1, wherein the angle between the return plate and the inner wall surface of the tower body is 75-90 °.

6. The coke oven gas circulating, washing and purifying device of claim 1, wherein the opening rate of the backflow plate is 10% -60%, and the backflow holes are round and/or square.

7. The coke oven gas circulating, washing and purifying device of claim 1, wherein the circulating device comprises a first circulating pump and a second circulating pump, first ends of the first circulating pump and the second circulating pump are connected with the washing liquid outlet, and second ends of the first circulating pump and the second circulating pump are connected with the washing liquid return port and the outer end waste water discharge port.

8. The coke oven gas circulating, washing and purifying device of claim 1, wherein a special plate group demister and a fiber bed demister are further installed in the tower body, the special plate group demister is located above the return plate group, the fiber bed demister is located above the special plate group demister, the special plate group demister can be used for absorbing liquid drops and impurities larger than a first preset size, the fiber bed demister can be used for absorbing liquid drops and impurities larger than a second preset size, and the second preset size is smaller than the first preset size.

9. The coke oven gas circulating, washing and purifying device of claim 8, wherein the first preset size is not more than 8 μm, and the second preset size is not more than 1 μm.

10. The coke oven gas circulating, washing and purifying device of claim 8, further comprising:

the washing system comprises a washing water storage tank, a washing pump and a washing nozzle, wherein the washing water storage tank is provided with the washing pump, the washing pump is arranged outside the tower body and is connected with the washing water storage tank through a pipeline, the washing nozzle is arranged inside the tower body and close to the special plate group demister and the fiber bed demister, and the washing system is used for spraying washing water on the special plate group demister and the fiber bed demister.

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