CN216409880U - Coke oven crude gas cooling device - Google Patents
Coke oven crude gas cooling device Download PDFInfo
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- CN216409880U CN216409880U CN202122869060.5U CN202122869060U CN216409880U CN 216409880 U CN216409880 U CN 216409880U CN 202122869060 U CN202122869060 U CN 202122869060U CN 216409880 U CN216409880 U CN 216409880U
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Abstract
The utility model discloses a raw coke oven gas cooling device. The cooling tower comprises a circular cooling tower body and a plate cooler, wherein the circular cooling tower body is provided with an air inlet and an air outlet and is of a hollow structure; the plate type cooling structure, the ammonia water distributor and the ammonia water and residual oil collector are all arranged in the circular cooling tower body, and the plate type cooling structure is positioned between the ammonia water distributor and the ammonia water and residual oil collector; the liquid inlet main pipe, the liquid outlet main pipe and the ammonia water and residual oil discharge main pipe are all arranged outside the circular cooling tower body; a coolant is arranged in the liquid inlet header pipe; the plate-type cooling structure is respectively connected with the liquid inlet main pipe and the liquid outlet main pipe; the residual oil discharge main pipe is connected with the ammonia water and residual oil collector and connected with the circular cooling tower body. The utility model has the advantages of small volume, good pressure bearing capacity, good sealing performance, high heat transfer coefficient, energy saving and consumption reduction.
Description
Technical Field
The utility model relates to a raw coke oven gas cooling device.
Background
The cooling process flow of the initial cooling and the final cooling of the coke oven gas (namely the coke oven crude gas) comprises the following steps: raw coke oven gas from a coke oven at the temperature of 82 ℃ and tar and ammonia water are conveyed to a gas-liquid separator along a gas suction pipeline, and the raw coke oven gas after gas-liquid separation is discharged from the upper part and enters a transverse pipe primary cooler to be cooled in two sections. The upper section uses 32 ℃ circulating water, and the lower section uses 16 ℃ cooling water to cool the coal gas to 21-22 ℃. The coal gas discharged from the lower part of the horizontal pipe primary cooler enters an electric tar precipitator to remove tar entrained in the coal gas, and then is pressurized and conveyed to a desulfurization section by a coal gas blower. In order to ensure the cooling effect of the primary cooler, the mixed liquid of tar and ammonia water is continuously sprayed on the middle part and the lower part of the upper section, and the top of the upper section is regularly washed by hot ammonia water to remove impurities such as tar, naphthalene and the like on the pipe wall. The condensate discharged from the upper and middle sections of the primary cooler flows into the upper section condensate tank through the water seal tank, the condensate is sent into the middle section of the primary cooler by a pump for circulating spraying, and the redundant part is sent to a gas suction pipeline.
The traditional square transverse pipe cooler is generally adopted for cooling coke oven gas (namely coke oven crude gas), and the equipment has the following defects: 1) the body shape is large and the volume is heavy: 5000m2The external dimension of the heat exchange area is as follows: 5 m.times.3.2 m.times.28 m. The weight is about 260 tons, the transportation cannot be realized, the field manufacturing can be realized, the processing period is long, and the processing period is generally four to six months. 2) Easy deformation under pressure: because the appearance is square structure and bears the pressure ability relatively poor, the appearance is out of shape easily and appears the potential safety hazard for a long time operation. 3) Uneven heat transfer that influences: the heat exchange tubes of the transverse tube cooler form a male surface and a female surface in the heat exchange process, so that the heat exchange efficiency is reduced, and the energy consumption is overlarge. 4) The later maintenance is difficult: the equipment is not designed with a manhole, so that the maintenance is difficult.
The prior art upgrades the traditional square horizontal tube cooler, and the upgraded square horizontal tube cooler has the following characteristics: 1) weight reduction: the traditional horizontal pipe arrangement is changed into inclined pipe arrangement, and the external bent pipe connection is changed into direct flange connection, so that the external bent pipe connection is reduced. 2) The sealing property is deteriorated: the horizontal pipe is changed into the inclined pipe, so that the welding difficulty is increased, and the leakage problem of the welding part is easy to occur. 3) The fundamental problem is not improved: the problems of easy deformation under pressure, uneven heating to influence heat exchange, difficult maintenance in the design later period of the manless hole and the like are not solved.
If the cooling process of the initial cooling and the final cooling of the coke oven gas (namely, the coke oven crude gas) fails to cool the coke oven crude gas with the temperature of about 80 ℃ to about 20 ℃, the coke oven crude gas cannot be utilized in the next process.
Therefore, it is necessary to develop a coke oven crude gas cooling device with small volume, good pressure bearing capacity, good sealing performance, high heat transfer coefficient, energy conservation and consumption reduction.
Disclosure of Invention
The utility model aims to provide a coke oven crude gas cooling device which is mainly applied to the initial cooling stage and the final cooling stage of coke oven gas (namely coke oven crude gas), can cool the coke oven crude gas at the temperature of about 80 ℃ to about 20 ℃, meets the use requirement of the next stage, and has the advantages of small volume, good pressure bearing capacity, good sealing performance, high heat transfer coefficient, energy conservation and consumption reduction.
In order to achieve the purpose, the technical scheme of the utility model is as follows: the coke oven crude gas cooling device is characterized in that: the cooling tower comprises a circular cooling tower body, a plate cooler, a liquid inlet header pipe and a liquid outlet header pipe, wherein the circular cooling tower body is provided with an air inlet and an air outlet and is of a hollow structure;
the plate type cooling structure, the ammonia water distributor and the ammonia water and residual oil collector are all arranged in the circular cooling tower body, and the plate type cooling structure is positioned between the ammonia water distributor and the ammonia water and residual oil collector;
the liquid inlet header pipe and the liquid outlet header pipe are arranged on the outer side of the circular cooling tower body;
the plate-type cooling structure is respectively connected with the liquid inlet main pipe and the liquid outlet main pipe;
the plate cooling structure comprises a plurality of plate cooling substructures;
the plate-type cooling substructures are arranged in a circular cooling tower body in a layered mode;
the plate-type cooling substructures are connected in parallel to the liquid inlet main pipe and the liquid outlet main pipe.
In the above technical solution, the manhole is arranged on the circular cooling tower body and is located at the plate type cooling structure.
In the technical scheme, the system also comprises an ammonia water and residual oil discharge main pipe;
the ammonia water and residual oil discharge main pipe is arranged outside the circular cooling tower body; the residual oil discharge main pipe is connected with the ammonia water and residual oil collector and the circular cooling tower body;
the ammonia water and residual oil collectors are connected in parallel and are all connected to an ammonia water and residual oil discharge main pipe;
an ammonia water distributor is arranged above each plate type cooling substructure, and an ammonia water and residual oil collector is arranged below each plate type cooling substructure.
In the above technical solution, the plate-type cooling substructure includes a coolant inlet, a coolant outlet, and one or more plate-type coolers;
the coolant liquid inlet is connected with a liquid inlet header pipe; the coolant outlet is connected with the liquid outlet header pipe;
when one plate cooler is arranged, the coolant liquid inlet, the plate cooler and the coolant liquid outlet are connected in sequence;
when the plate cooler has a plurality of, a plurality of plate cooler series connection are a plate cooler group, and coolant inlet, plate cooler group, coolant liquid outlet connect gradually.
In the technical scheme, a coolant circulation cavity and a coke oven crude gas circulation cavity are arranged on the plate cooler; the coolant circulation cavity is arranged close to the raw gas circulation cavity of the coke oven;
the number of the coolant circulation cavities is multiple, and the coolant circulation cavities are arranged at intervals; a plurality of coke oven crude gas circulation cavities are arranged at intervals;
the coolant circulation cavity is respectively communicated with a coolant liquid inlet and a coolant liquid outlet;
the coke oven crude gas circulation cavity is respectively communicated with the hollow cavity of the circular cooling tower body, the ammonia water and the residual oil collector.
In the technical scheme, the size of the coke oven crude gas circulation cavity is larger than or equal to that of the coolant circulation cavity.
In the above technical solution, the plate cooler includes, but is not limited to, a straight plate cooler, a concave-convex multi-plate cooler, a corrugated plate cooler, and a spiral cooler.
In the technical scheme, the plate cooler is a spiral cooler;
the coolant circulation cavity is provided with a plurality of circles; the coke oven crude gas circulation cavity is provided with a plurality of circles;
one circle of coke oven crude gas circulation cavity is arranged between two adjacent circles of coolant circulation cavities.
In the technical scheme, the ammonia water distributor comprises an ammonia spraying main body, an ammonia water inlet, an ammonia spraying main pipe, an ammonia spraying branch pipe and an ammonia water nozzle;
the ammonia water inlet is arranged on one side of the ammonia spraying main body;
the ammonia spraying main pipe is connected with an ammonia water inlet;
the ammonia spraying main pipes are arranged on the ammonia spraying main pipe at intervals and are communicated with the ammonia spraying main pipe;
the ammonia spraying branch pipes are arranged on the ammonia spraying main pipe at intervals and are positioned between the ammonia spraying main pipe and the inner wall of the ammonia spraying main body;
the ammonia water nozzles are respectively arranged on the ammonia spraying main pipe, the ammonia spraying main pipe and the ammonia spraying branch pipe.
The utility model has the following advantages:
(1) the heat transfer coefficient is improved; for heat exchange between water and water, the heat exchange coefficient of the traditional square transverse tube cooler adopting a tube type heat exchanger is generally 1000-2000W/(m 2℃), and the heat exchange coefficient of the spiral cooler adopted by the utility model can reach 2000-3000W/(m 2℃); compared with the prior art, the heat transfer coefficient value of the utility model is improved by about 100-150%; the reason for the high heat transfer coefficient of the utility model is: a) the utility model adopts a mode that a large flow passes through a large circulation cavity and a small flow passes through a small circulation cavity, so that the Reynolds number is lower, and the fluid in the rotational flow channel can reach turbulence at a lower Reynolds number due to the action of centrifugal inertia force; b) the utility model allows the fluid to adopt higher flow velocity, so the heat transfer coefficient is larger;
(2) the heat exchange efficiency is high: the spiral cooler is adopted, and because the heat exchange surfaces of the spiral cooler are all at the optimal heat exchange angle, the heat exchange efficiency is improved by 60 percent compared with that of a transverse energy consumption tube cooler, and the heat exchange area can be greatly reduced;
(3) the heat exchange area per unit volume is increased; under the condition of the same heat exchange area (with the heat exchange area of 5000 m)2For example), the external dimension required by the traditional square transverse tube cooler is 5m multiplied by 3.2m multiplied by 28m, the utility model is adoptedThe size of the model is phi 2.6m multiplied by 21 m; compared with the traditional square transverse tube cooler, the heat exchange area per unit volume of the utility model is improved by about 302 percent, and the volume is reduced by about 3/4 percent;
(4) has anti-blocking property; because the flow channel of each fluid is a single channel, the fluid has higher speed and the action of centrifugal inertia force, the turbulence degree is high, and suspended particles in the fluid are not easy to deposit, the spiral cooler is not easy to scale and block, and is suitable for treating suspension and liquid with higher viscosity; in the utility model, the ammonia water and the residual oil flowing through each layer of plate-type cooling substructure are discharged to the residual oil collecting part at the bottom of the circular cooling tower body through the ammonia water and residual oil discharge header pipe, so that the plate-type cooling substructure at the lower layer is prevented from being blocked;
(5) has self-cleaning property; the flow velocity of the fluid is high, the turbulence degree is high, the impact force of the fluid on the pipe wall is large, and the self-cleaning characteristic is achieved;
(6) recovering low-temperature heat energy: by adopting the plate-type cooling substructure, heat exchange can still be carried out under the condition that the temperature difference between two fluids is small, and low-temperature heat energy can be recovered by utilizing the plate-type cooling substructure to recycle waste heat;
(7) reducing heat loss: the utility model has compact structure, small volume and small external surface area, and because the fluid which is close to the normal temperature flows through the outer edge channel, the heat preservation is not needed;
(8) two channels (namely a coolant circulation cavity and a coke oven crude gas circulation cavity) in the plate cooler are welded and sealed, so that heat exchange media are not mixed, and a gasket for sealing between the same media channels is pressed by a flange cover and is not short-circuited;
(9) the manhole and the spraying flushing device are arranged between each section, so that the horizontal tube cooler is convenient to clean and maintain, the service life of the horizontal tube cooler is prolonged to more than three times that of the original horizontal tube cooler, and the cost of the horizontal tube cooler is reduced by 30 percent; the defects that the traditional square transverse pipe cooler is difficult to overhaul, the heat exchange pipes are distributed in a staggered manner and difficult to clean due to no-man hole design are overcome;
(10) the utility model adopts a sectional (layered) design, and can be regularly cleaned by high-pressure water washing after the equipment is disassembled in unclean fluid if the impurities are too much and have viscosity, so that the maintenance and the repair are convenient.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a circular cooling tower according to the present invention.
Fig. 3 is a sectional view taken along line a-a of fig. 2.
Fig. 4 is a sectional view taken along line B-B of fig. 3.
FIG. 5 is a schematic view showing the structure of the ammonia water distributor of the present invention.
FIG. 6 is a schematic view showing the structure of the ammonia water and residue collector in the present invention.
Fig. 7 is a schematic structural diagram of the ammonia water and residual oil effluent collecting plates of the present invention installed on two adjacent liquid collecting boxes and above the gas channel.
Fig. 8 is a schematic structural diagram of a conventional square cross-tube cooler adopting a square tower body and a cross-tube cooler.
Fig. 9 is an enlarged view at T of fig. 8.
Fig. 10 is a top view of fig. 9.
Fig. 11 is a schematic structural view showing that the horizontal tube coolers in the conventional square horizontal tube cooler are communicated through a plurality of connecting flanges arranged on the outer side of the tower body.
In fig. 2, E1 is the first cooling section; e2 is the second cooling section; g is a connecting channel for communicating a plurality of plate coolers; h represents the residue collection section.
In fig. 8, C1 is a square tower.
In fig. 9 and 10, C1 is a square tower body; c2 is a transverse cooling pipe; c3 is a flow channel of the coke oven crude gas (the flow channel of the coke oven crude gas is positioned between two adjacent cooling transverse pipes).
In fig. 11, C1 is a square tower; c4 is a connecting flange (for connecting two groups of horizontal tube coolers C5, namely, the coolant flows from the group of horizontal tube coolers C5 at the uppermost end through the connecting flange to the group of horizontal tube coolers C5 at the lowermost end, the temperature of the coolant in the horizontal tube coolers at each layer is unequal, and is increased from top to bottom, and the cooling efficiency is decreased progressively, so that the heat exchange efficiency is reduced, the cooling time of the coke oven crude gas is prolonged, the cooling effect on the coke oven crude gas (namely, the coke oven crude gas at about 80 ℃ is cooled to about 20 ℃) cannot be met, and the use requirement of the next stage cannot be met); the C5 is a group of transverse tube coolers (the group of transverse tube coolers C5 comprises transverse cooling tubes C2 arranged at intervals, and a flow channel C3 of coke oven crude gas is positioned between two adjacent transverse cooling tubes C2); c6 is an ammonia distributor (the ammonia distributor is only arranged on the uppermost group of cross-tube coolers).
In the figure, 1-a circular cooling tower body, 1.1-an air inlet, 1.2-an air outlet, 2-a plate cooling structure, 2.1-a plate cooling substructure, 2.1A-a coolant inlet, 2.1B-a coolant outlet, 2.11-a plate cooler, 2.11A-a plate cooler inlet, 2.11B-a plate cooler outlet, 2.11C-a coolant circulation cavity, 2.11D-a coke oven crude gas circulation cavity, a Z-plate cooler group, a 3-inlet manifold, a 4-outlet manifold, a 5-ammonia distributor, a 5.1-ammonia injection main body, a 5.2-ammonia inlet, a 5.3-ammonia injection main pipe, a 5.4-ammonia injection main pipe, a 5.5-ammonia injection branch pipe, a 5.6-ammonia injection nozzle, a 6-residual oil collector, a 6.1-a collector main body, 6.2-an ammonia water and residual oil liquid outlet, 6.3-a liquid collecting box, 6.4-a gas channel, 6.5-an ammonia water and residual oil liquid outlet collecting plate, 7-an ammonia water and residual oil discharging header pipe, 8-a manhole, and 9-an intelligent spraying and flushing device.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are not intended to limit the present invention, but are merely exemplary. While the advantages of the utility model will be clear and readily understood by the description.
The utility model is mainly applied to the initial cooling and final cooling stages of coke oven gas (namely coke oven crude gas), can cool the coke oven crude gas at the temperature of about 80 ℃ to about 20 ℃, meets the use requirement of the next stage, and has the advantages of small volume, good pressure bearing capacity, good sealing performance, high heat transfer coefficient, energy conservation and consumption reduction.
The circular cooling tower body is adopted, so that the pressure bearing performance is strong, and the deformation caused by pressure is not easy to occur; the defect that the lower part of the square tower body protrudes outwards due to the fact that the square tower body is not pressure-bearing when the traditional square transverse pipe cooler is adopted is overcome.
In the utility model, a plurality of plate-type cooling substructures 2.1 are all connected to the liquid inlet main pipe 3 in parallel, therefore, the coolant introduced into the plate-type cooler 2.11 in each layer of plate-type cooling substructures 2.1 is from the liquid inlet main pipe 3 (the coolant in the liquid inlet main pipe 3 is the coolant with the lowest temperature, and normal temperature water is generally adopted), therefore, the coolant in the liquid inlet main pipe 3 can be utilized to the maximum extent by each layer of plate-type cooling substructures 2.1 to reduce the temperature of the coke oven crude gas, so that the utilization rate of the coolant in the liquid inlet main pipe 3 is improved, the coolant in the liquid inlet main pipe 3 is utilized more efficiently, the consumption of the coolant in the liquid inlet main pipe 3 is reduced, and the purposes of energy conservation and consumption reduction are achieved.
The plurality of plate-type cooling substructures 2.1 are connected to the liquid outlet main pipe 4 in parallel, the temperature of the coolant subjected to heat exchange in each layer of plate-type cooling substructures 2.1 is increased, and the coolant is directly discharged into the liquid outlet main pipe 4 and does not enter the next layer of plate-type cooling substructures 2.1 for use, so that the heat exchange efficiency is improved, the cooling time of the coke oven crude gas is saved, the cooling effect of the coke oven crude gas (namely, the coke oven crude gas at about 80 ℃ is cooled to about 20 ℃) is ensured, and the use requirement of the next stage is met; the problem of among the square horizontal pipe cooler of current tradition, the coolant passes through flange one direct current to the horizontal pipe cooler of a set of that is located the lowermost end from a set of horizontal pipe cooler that is located the top, the temperature of the coolant that is located horizontal pipe cooler at each layer varies, and from top to bottom increases progressively, and cooling efficiency subtracts progressively, and heat exchange efficiency is low, and because ambient temperature is too high in summer, through tower body to coke oven raw coke oven gas heat transfer, cause the coke oven raw coke oven gas temperature of discharging from the tower body gas outlet can not satisfy the user demand is overcome.
The utility model adopts a plate cooler, preferably a spiral cooler; the spiral cooler can adjust the sizes of a coolant circulation cavity and a coke oven crude gas circulation cavity (even if the size of the cavity of the coke oven crude gas circulation cavity is larger than that of the coolant circulation cavity), so that coke oven crude gas with large flow rate flows through a large channel (namely the coke oven crude gas circulation cavity), and coolant with small flow rate flows through a small channel (namely the coolant circulation cavity), so that coke oven crude gas forms turbulence in the hollow cavity of the circular cooling tower body, the design structure is reasonable, the heat exchange surfaces of the spiral cooler are all at the optimal heat exchange angle, the heat exchange efficiency is improved by 60 percent compared with that of a transverse energy consumption pipe cooler, the heat transfer coefficient is improved, the heat exchange area can be greatly reduced, and the volume is reduced (the volume of the utility model can be only 1/4 of the traditional square transverse pipe cooler); the cooling tower overcomes the defects that the traditional square transverse pipe cooler adopts a square tower body and a transverse pipe cooler, a gas (coke oven crude gas) channel is only 1/8 of a tower body cavity, a liquid (coolant)) channel is a tower body cavity 7/8, the flow of the coke oven crude gas is far greater than that of the coolant, the coke oven crude gas forms laminar flow in the tower body, and the design structure is unreasonable (as shown in figures 8, 9, 10 and 11), so the volume of the tower body needs to be enlarged on the premise of meeting the cooling requirement, and the energy consumption is increased.
With reference to the accompanying drawings: the coke oven crude gas cooling device comprises a circular cooling tower body 1, a plate cooler 2, a liquid inlet header pipe 3 and a liquid outlet header pipe 4, wherein the circular cooling tower body 1 is provided with a gas inlet 1.1 and a gas outlet 1.2, the gas inlet 1.1 is positioned at the upper end of the circular cooling tower body 1, and the gas outlet 1.2 is positioned at the lower part of the circular cooling tower body 1; the circular cooling tower body 1 is of a hollow structure;
the plate-type cooling structure 2, the ammonia water distributor 5 and the ammonia water and residual oil collector 6 are all arranged in the circular cooling tower body 1, and the plate-type cooling structure 2 is positioned between the ammonia water distributor 5 and the ammonia water and residual oil collector 6;
the liquid inlet header pipe 3 and the liquid outlet header pipe 4 are arranged at the outer side of the circular cooling tower body 1;
a coolant is arranged in the liquid inlet header pipe 3;
the plate-type cooling structure 2 is respectively connected with a liquid inlet header pipe 3 and a liquid outlet header pipe 4;
the plate cooling structure 2 comprises a plurality of plate cooling substructures 2.1;
the plate-type cooling substructures 2.1 are arranged in layers in the circular cooling tower body 1; wherein each plate-type cooling substructure 2.1 is arranged as one layer, and a plurality of plate-type cooling substructures 2.1 are arranged in a plurality of layers at intervals in the circular cooling tower body 1;
a plurality of plate cooling substructures 2.1 are connected in parallel; the plate-type cooling substructures 2.1 are connected in parallel to the liquid inlet header pipe 3 and the liquid outlet header pipe 4.
Further, a manhole 8 is arranged on the circular cooling tower body 1 and at the plate type cooling substructure 2.1; a manhole 8 is arranged at the 2.1 position of each layer of plate type cooling substructure, an intelligent spraying and flushing device 9 is arranged in the manhole 8 (the intelligent spraying and flushing device is used for maintenance and cleaning), and the manhole 8 and the spraying and flushing device are arranged between every two adjacent sections of plate type coolers 2.11, so that the cleaning and the maintenance are convenient; compared with the traditional horizontal pipe cooler, the service life of the plate type cooling structure is prolonged by more than three times, and the use cost is reduced by 30%; the defects that the traditional square transverse pipe cooler is designed in an unmanned hole mode, is difficult to overhaul, has the heat exchange pipes distributed in a staggered mode, is difficult to clean and has high use cost are overcome.
Furthermore, the coke oven crude gas cooling device also comprises an ammonia water and residual oil discharge main pipe 7;
the ammonia water and residual oil discharge header pipe 7 is arranged outside the circular cooling tower body 1; the residual oil discharge main pipe 7 is connected with the ammonia water and residual oil collector 6 and is connected with the residual oil collecting part at the bottom of the circular cooling tower body 1
A plurality of ammonia water and residual oil collectors 6 are arranged, and the plurality of ammonia water and residual oil collectors 6 are connected in parallel and are all connected to an ammonia water and residual oil discharge header pipe 7;
an ammonia water distributor 5 is arranged above each plate type cooling substructure 2.1, and an ammonia water and residual oil collector 6 is arranged below each plate type cooling substructure; the flushing effect of ammonia water on the coke oven crude gas is ensured, the flushing efficiency is high, the flushed residual oil is cleaned in time, and the situation that the residual oil treated by the upper layer of the plate-type cooling structure 2, the ammonia water and the residual oil collector 6 blocks the lower layer of the plate-type cooling structure 2 is avoided; the defects that an ammonia water distributor of the traditional square transverse pipe cooler is only arranged on the uppermost group of transverse pipe coolers, the flushing effect of residual oil is gradually reduced, the flushing efficiency is low, and the flushed residual oil is easy to block the transverse pipe cooler on the lower layer are overcome.
Further, the plate cooling substructure 2.1 comprises a coolant inlet 2.1A, a coolant outlet 2.1B and one or more plate coolers 2.11;
the coolant liquid inlet 2.1A is connected with a liquid inlet header pipe 3; the coolant outlet 2.1B is connected with the liquid outlet header pipe 4;
when one plate cooler 2.11 is arranged, the coolant liquid inlet 2.1A, the plate cooler 2.11 and the coolant liquid outlet 2.1B are connected in sequence;
when the plate cooler 2.11 has a plurality of, a plurality of plate coolers 2.11 are connected in series through the connecting channel to form a plate cooler group Z, and the coolant inlet 2.1A, the plate cooler group Z and the coolant outlet 2.1B are connected in sequence.
Furthermore, a plate cooler liquid inlet 2.11A, a plate cooler liquid outlet 2.11B, a coolant circulation cavity 2.11C and a coke oven crude gas circulation cavity 2.11D are arranged on the plate cooler 2.11; the coolant circulation cavity 2.11C is arranged close to the coke oven crude gas circulation cavity 2.11D; the liquid inlet 2.11A of the plate cooler is positioned below the liquid outlet 2.11B of the plate cooler;
when one plate cooler 2.11 is arranged, the coolant liquid inlet 2.1A, the plate cooler liquid inlet 2.11A, the coolant circulating cavity 2.11C, the cooler liquid outlet 2.11B and the coolant liquid outlet 2.1B are sequentially connected;
when a plurality of plate coolers 2.11 are arranged, the coolant liquid inlet 2.1A, the plate cooler liquid inlet 2.11A, the coolant circulation cavity 2.11C and the plate cooler liquid outlet 2.11B of the plate cooler 2.11 positioned at the lowermost layer are sequentially connected, the plate cooler liquid outlet 2.11B of the plate cooler 2.11 positioned at the lowermost layer is communicated with the plate cooler liquid inlet 2.11A of the plate cooler 2.11 positioned at the lowermost layer positioned at the next upper layer through a communication pipeline, and so on until the plate cooler 2.11 positioned at the lowermost layer is communicated with the plate cooler 2.11 positioned at the uppermost layer in a series connection manner, and the plate cooler liquid outlet 2.11B of the plate cooler 2.11 positioned at the uppermost layer is connected with the coolant liquid outlet 2.1B;
the plate coolers 2.11 are connected in series through connecting channels to form a plate cooler group Z, and the coolant inlet 2.1A, the plate cooler group Z and the coolant outlet 2.1B are connected in sequence.
A plurality of coolant circulation cavities 2.11C are arranged, and the plurality of coolant circulation cavities 2.11C are arranged at intervals; a plurality of coke oven raw gas circulation cavities 2.11D are arranged, and the plurality of coke oven raw gas circulation cavities 2.11D are arranged at intervals;
the coolant circulation cavity 2.11C is respectively communicated with a coolant liquid inlet 2.1A and a coolant liquid outlet 2.1B; the parts of the coolant circulating cavity 2.11C, which are communicated with the circular cooling tower body 1, are sealed by a sealing structure;
the coke oven crude gas circulation cavity 2.11D is respectively communicated with the hollow cavity of the circular cooling tower body 1, the ammonia water and the residual oil collector 6.
The hollow cavities of the circular cooling tower 1 are divided into a first cooling section E1 (normal temperature water cooling section) and a second cooling section E2 (super cooled water cooling section); the liquid inlet header pipe 3 comprises a first liquid inlet header pipe and a second liquid inlet header pipe; the coolant in the first liquid inlet main pipe is normal-temperature water; the coolant which is introduced into each plate cooler 2.11 in the first cooling part through the first liquid inlet header pipe is normal-temperature water; the coolant which is introduced into each plate cooler 2.11 in the second cooling part through the second liquid inlet header pipe is refrigerating water, so that the outlet temperature of the cooled coke oven crude gas meets the use requirement of the next stage.
Further, the size of the coke oven crude gas flow-through chamber 2.11D is larger than or equal to the size of the coolant flow-through chamber 2.11C.
Further, the plate cooler 2.11 includes, but is not limited to, a straight plate cooler, a concave-convex multi-plate cooler, a corrugated plate cooler, a spiral cooler.
Furthermore, the plate cooler 2.11 is a spiral cooler, and the coolant circulating cavity 2.11C is closely attached to the coke oven crude gas circulating cavity 2.11D;
the coolant circulation cavity 2.11C has a plurality of circles; the coke oven crude gas circulation cavity 2.11D has a plurality of circles;
one circle of coke oven crude gas circulation cavity 2.11D is arranged between two adjacent circles of coolant circulation cavities 2.11C.
Further, the ammonia water distributor 5 comprises a circular ammonia spraying main body 5.1, an ammonia water inlet 5.2, an ammonia spraying header pipe 5.3, an ammonia spraying main pipe 5.4, an ammonia spraying branch pipe 5.5 and an ammonia water nozzle 5.6; the round ammonia spraying body 5.1 is a closed structure with an opening at one side;
an ammonia water inlet 5.2 is arranged at one side of the circular ammonia spraying main body 5.1;
the ammonia spraying header pipe 5.3 is connected with an ammonia water inlet 5.2;
the ammonia spraying main pipes 5.4 are arranged on the ammonia spraying header pipe 5.3 at intervals and are communicated with the ammonia spraying header pipe 5.3;
the plurality of ammonia spraying branch pipes 5.5 are arranged on the ammonia spraying main pipe 5.4 at intervals and are positioned between the ammonia spraying main pipe 5.4 and the inner wall of the circular ammonia spraying main body 5.1;
the ammonia water nozzles 5.6 are respectively arranged on the ammonia spraying main pipe 5.3, the ammonia spraying main pipe 5.4 and the ammonia spraying branch pipe 5.5.
Further, the ammonia water and residual oil collector 6 comprises an annular collector main body 6.1, an ammonia water and residual oil outlet 6.2, a liquid collecting box 6.3, a gas channel 6.4 and an ammonia water and residual oil outlet collecting plate 6.5;
an ammonia water and residual oil outlet 6.2 is arranged on the outer wall of the annular collector main body 6.1 and is respectively communicated with the annular collector main body 6.1 and an ammonia water and residual oil discharge header pipe 7;
the upper end of the liquid collecting box 6.3 is communicated with the hollow cavity of the circular cooling tower body 1, the lower end is a closed end, and the two side ends are respectively communicated with the annular collector main body 6.1; a plurality of liquid collecting boxes 6.3 are arranged at intervals;
the gas channel 6.4 is positioned between two adjacent liquid collecting boxes 6.3; the gas channel 6.4 is communicated with the hollow cavity of the circular cooling tower body 1;
the ammonia water and residual oil effluent collecting plates 6.5 are positioned above the gas channel 6.4 and are respectively arranged on the two adjacent liquid collecting boxes 6.3; an ammonia water and residual oil effluent collecting plate 6.5 is connected with an annular collector body 6.1; the gas (namely, coke oven crude gas) and the liquid (namely, ammonia water, coke oven crude gas flushing liquid, slag oil and the like) flow in the same direction and all flow from top to bottom, when the gas and the liquid flow through the ammonia water and residual oil collector 6, the liquid is intercepted by the liquid collecting box 6.3 and the ammonia water and residual oil outlet liquid collecting plate 6.5 and is discharged to the residual oil collecting part at the bottom of the circular cooling tower body 1 through the annular collector main body 6.1 and the ammonia water and residual oil discharging main pipe 7 for treatment.
The cooling method of the coke oven crude gas cooling device comprises the following steps,
the method comprises the following steps: starting a coke oven crude gas cooling device;
the liquid inlet header pipe 3 leads coolant into each layer of plate type cooling substructure 2.1 of the plate type cooling structure 2 through each coolant liquid inlet 2.1A connected with the liquid inlet header pipe in parallel, so that the coolant flowing cavity 2.11C of each layer of plate type cooling substructure 2.1 is filled with the coolant;
the ammonia water nozzles 5.6 on each layer of ammonia water distributors 5 spray ammonia water to the hollow cavity of the circular cooling tower body 1;
step two: raw coke oven gas is refrigerated by ammonia water, oil is removed, and the raw coke oven gas is cooled by a plate type cooling structure;
after raw coke oven gas enters the hollow cavity of the circular cooling tower body 1 from the gas inlet 1.1, ammonia water sprayed by an ammonia water nozzle 5.6 of a first layer of ammonia water distributor 5 positioned below the gas inlet 1.1 directly washes the raw coke oven gas, and performs primary cooling and residual oil removal on the raw coke oven gas for the first time; at the moment, flushing ammonia water containing residual oil passes through the coke oven crude gas circulation cavity 2.11D of the first layer plate type cooling substructure 2.1, falls into a first layer ammonia water and residual oil collector 6 positioned below the first layer plate type cooling substructure 2.1, and is discharged into a residual oil collecting part at the bottom of the circular cooling tower body 1 through an ammonia water and residual oil discharge header pipe 7;
meanwhile, the coke oven crude gas refrigerated by ammonia water and subjected to residual oil removal enters a coke oven crude gas circulation cavity 2.11D of the first layer plate type cooling substructure 2.1;
the coolant circulation cavity 2.11C of the first layer plate type cooling substructure 2.1 takes away the heat of the coke oven raw gas in the coke oven raw gas circulation cavity 2.11D through the coolant in the liquid inlet main pipe 3, and the coke oven raw gas is cooled for the first time;
step three: raw coke oven gas is refrigerated by ammonia water, oil is removed, and the raw coke oven gas is cooled by a plate type cooling structure;
the coke oven crude gas treated in the step two moves downwards in the hollow cavity, ammonia water sprayed by an ammonia water nozzle 5.6 of a second layer of ammonia water distributor 5 positioned above a second layer of plate type cooling substructure 2.1 directly washes the coke oven crude gas, and performs secondary primary cooling and residual oil removal on the coke oven crude gas; at the moment, flushing ammonia water containing residual oil passes through the coke oven crude gas circulation cavity 2.11D of the second floor type cooling substructure 2.1, falls into a second floor ammonia water and residual oil collector 6 positioned below the second floor type cooling substructure 2.1, and is discharged into a residual oil collecting part at the bottom of the circular cooling tower body 1 through an ammonia water and residual oil discharge header pipe 7;
meanwhile, the coke oven crude gas refrigerated by ammonia water and subjected to residual oil removal enters a coke oven crude gas circulation cavity 2.11D of the second layer plate type cooling substructure 2.1;
the coolant circulation cavity 2.11C of the second layer plate type cooling substructure 2.1 takes away the heat of the coke oven raw gas in the coke oven raw gas circulation cavity 2.11D through the coolant in the liquid inlet main pipe 3, and the coke oven raw gas is cooled for the second time;
step four: repeating the third step until the ammonia water distributor 5 and the ammonia water and residual oil collector 6 which are positioned at the bottommost layer in the hollow cavity of the circular cooling tower body 1 complete the initial cooling and residual oil removal of the coke oven crude gas, and the plate type cooling substructure 2.1 which is positioned at the bottommost layer completes the cooling of the coke oven crude gas, and entering the next step;
step five: discharging the coke oven crude gas out of the circular cooling tower body;
and discharging the coke oven crude gas cooled in the fourth step out of the circular cooling tower body from the gas outlet 1.2, and entering the next working procedure.
In order to more clearly illustrate the advantages of the coke oven crude gas cooling device of the utility model compared with the prior art, the two technical schemes are compared by workers, and the comparison results are as follows:
as can be seen from the above table, compared with the prior art, the coke oven crude gas cooling device provided by the utility model has the advantages of small volume, short construction period, good pressure bearing performance, difficulty in compression deformation, improved heat exchange efficiency and convenience in maintenance and overhaul.
Other parts not described belong to the prior art.
Claims (9)
1. The coke oven crude gas cooling device is characterized in that: the cooling tower comprises a circular cooling tower body (1), a plate cooler (2.11), a liquid inlet header pipe (3) and a liquid outlet header pipe (4), wherein an air inlet (1.1) and an air outlet (1.2) are formed in the circular cooling tower body (1), and the circular cooling tower body (1) is of a hollow structure;
the plate-type cooling structure (2), the ammonia water distributor (5) and the ammonia water and residual oil collector (6) are all arranged in the circular cooling tower body (1), and the plate-type cooling structure (2) is positioned between the ammonia water distributor (5) and the ammonia water and residual oil collector (6);
the liquid inlet header pipe (3) and the liquid outlet header pipe (4) are arranged at the outer side of the circular cooling tower body (1);
the plate-type cooling structure (2) is respectively connected with the liquid inlet header pipe (3) and the liquid outlet header pipe (4);
the plate cooling structure (2) comprises a plurality of plate cooling substructures (2.1);
the plate-type cooling substructures (2.1) are arranged in a circular cooling tower body (1) in a layered manner;
the plate-type cooling substructures (2.1) are connected in parallel on the liquid inlet header pipe (3) and connected in parallel on the liquid outlet header pipe (4).
2. The coke oven crude gas cooling device of claim 1, wherein: the manhole (8) is arranged on the round cooling tower body (1) and is positioned at the plate type cooling structure (2).
3. The coke oven raw gas cooling device of claim 1 or 2, characterized in that: also comprises an ammonia water and residual oil discharge main pipe (7);
the ammonia water and residual oil discharge header pipe (7) is arranged outside the circular cooling tower body (1); the residual oil discharge main pipe (7) is connected with the ammonia water and residual oil collector (6) and is connected with the circular cooling tower body (1);
a plurality of ammonia water and residual oil collectors (6) are arranged, and the plurality of ammonia water and residual oil collectors (6) are connected in parallel and are all connected to an ammonia water and residual oil discharge main pipe (7);
an ammonia water distributor (5) is arranged above each plate type cooling substructure (2.1), and an ammonia water and residual oil collector (6) is arranged below each plate type cooling substructure.
4. The coke oven crude gas cooling device of claim 3, wherein: the plate-type cooling substructure (2.1) comprises a coolant inlet (2.1A), a coolant outlet (2.1B) and one or more plate-type coolers (2.11);
the coolant liquid inlet (2.1A) is connected with the liquid inlet header pipe (3); the coolant outlet (2.1B) is connected with the liquid outlet header pipe (4);
when one plate cooler (2.11) is arranged, the coolant liquid inlet (2.1A), the plate cooler (2.11) and the coolant liquid outlet (2.1B) are connected in sequence;
when the plate coolers (2.11) are multiple, the plate coolers (2.11) are connected in series to form a plate cooler group (Z), and the coolant liquid inlet (2.1A), the plate cooler group (Z) and the coolant liquid outlet (2.1B) are sequentially connected.
5. The coke oven crude gas cooling device of claim 4, wherein: the plate cooler (2.11) is provided with a coolant circulation cavity (2.11C) and a coke oven crude gas circulation cavity (2.11D); the coolant circulation cavity (2.11C) is arranged close to the raw coke oven gas circulation cavity (2.11D);
a plurality of coolant circulation cavities (2.11C) are arranged, and the plurality of coolant circulation cavities (2.11C) are arranged at intervals; a plurality of coke oven raw gas circulation cavities (2.11D) are arranged at intervals;
the coolant circulation cavity (2.11C) is respectively communicated with the coolant liquid inlet (2.1A) and the coolant liquid outlet (2.1B);
the coke oven crude gas circulation cavity (2.11D) is respectively communicated with the hollow cavity of the circular cooling tower body (1), the ammonia water and the residual oil collector (6).
6. The coke oven crude gas cooling device of claim 5, wherein: the size of the coke oven crude gas circulation cavity (2.11D) is larger than or equal to the size of the coolant circulation cavity (2.11C).
7. The coke oven crude gas cooling device of claim 6, wherein: the plate cooler (2.11) includes but is not limited to a straight plate cooler, a concave-convex multi-plate cooler, a corrugated plate cooler, a spiral cooler.
8. The coke oven crude gas cooling device of claim 7, wherein: the plate cooler (2.11) is a spiral cooler; the coolant circulation cavity (2.11C) has a plurality of circles; the coke oven crude gas circulation cavity (2.11D) is provided with a plurality of circles;
one circle of coke oven crude gas circulation cavity (2.11D) is arranged between two adjacent circles of coolant circulation cavities (2.11C).
9. The coke oven crude gas cooling device of claim 8, wherein: the ammonia distributor (5) comprises an ammonia spraying main body (5.1), an ammonia water inlet (5.2), an ammonia spraying main pipe (5.3), an ammonia spraying main pipe (5.4), an ammonia spraying branch pipe (5.5) and an ammonia water nozzle (5.6);
the ammonia water inlet (5.2) is arranged at one side of the ammonia spraying main body (5.1);
the ammonia spraying header pipe (5.3) is connected with an ammonia water inlet (5.2);
the ammonia spraying main pipes (5.4) are arranged on the ammonia spraying main pipe (5.3) at intervals and are communicated with the ammonia spraying main pipe (5.3);
the plurality of ammonia spraying branch pipes (5.5) are arranged on the ammonia spraying main pipe (5.4) at intervals and are positioned between the ammonia spraying main pipe (5.4) and the inner wall of the ammonia spraying main body (5.1);
the ammonia water nozzles (5.6) are respectively arranged on the ammonia spraying main pipe (5.3), the ammonia spraying main pipe (5.4) and the ammonia spraying branch pipe (5.5).
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| CN202122869060.5U CN216409880U (en) | 2021-11-22 | 2021-11-22 | Coke oven crude gas cooling device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136137A (en) * | 2021-11-22 | 2022-03-04 | 鲁德祥 | Coke oven waste gas cooling device and cooling method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114136137A (en) * | 2021-11-22 | 2022-03-04 | 鲁德祥 | Coke oven waste gas cooling device and cooling method thereof |
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Effective date of registration: 20230613 Address after: 433226 No. 1 Zhonghua Road, Fuchang Town, Honghu City, Jingzhou City, Hubei Province Patentee after: Lu Dexiang Patentee after: Honghu Yinlong New Energy Engineering Co.,Ltd. Address before: 433226 No. 1 Zhonghua Road, Fuchang Town, Honghu City, Jingzhou City, Hubei Province Patentee before: Lu Dexiang |
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Effective date of registration: 20231122 Address after: 433226 No. 1 Zhonghua Road, Fuchang Town, Honghu City, Jingzhou City, Hubei Province Patentee after: Lu Ying Address before: 433226 No. 1 Zhonghua Road, Fuchang Town, Honghu City, Jingzhou City, Hubei Province Patentee before: Lu Dexiang Patentee before: Honghu Yinlong New Energy Engineering Co.,Ltd. |
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Assignee: HUBEI TENGFEI PETROCHEMICAL TECHNOLOGY CO.,LTD. Assignor: Lu Ying Contract record no.: X2024980012715 Denomination of utility model: Coke oven raw gas cooling device Granted publication date: 20220429 License type: Exclusive License Record date: 20240826 |
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