CN214400391U

CN214400391U - Coal gas cooling device

Info

Publication number: CN214400391U
Application number: CN202120341872.XU
Authority: CN
Inventors: 江玉璋; 江玉先
Original assignee: Shandong Hengsheng Chemical Equipment Co ltd
Current assignee: Shandong Hengsheng Chemical Equipment Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-10-15
Anticipated expiration: 2031-02-05

Abstract

The utility model discloses a coal gas cooling device, which comprises a housin, the upper end of casing is equipped with the coal gas entry, and lower extreme one side is equipped with the coal gas export, and the opposite side is equipped with the drain, top-down is provided with sprays layer, cooling zone and disconnected liquid layer in the casing, the cooling layer is equipped with cooling water inlet, cooling water export, steam inlet and vapor outlet, disconnected liquid layer communicates with each other with the leakage fluid dram of locating the casing lateral wall, casing inner chamber bottom is equipped with the heating pipe that is used for the heating to deposit at casing bottom filth. The cooling device is characterized in that a plurality of layers of cooling sections are arranged in the shell from top to bottom, a coal gas direct-current cooling channel is formed in the shell by the plurality of layers of cooling sections, the direct-current channel is adopted, the heat exchange has no dead angle, the cooling effect is good, the cleaning is convenient, the scaling is avoided, the gas resistance is small, and the cooling device is beneficial to subsequent processes and air blowers. The device has small integral volume and small occupied area, and is convenient to transport and install.

Description

Coal gas cooling device

Technical Field

The utility model relates to a gas cooling field, specific coal gas cooling device that says so.

Background

Raw coke oven gas generated by the existing coke oven in China is a horizontal tube type primary cooler cooling process, the raw coke oven gas, tar and ammonia water from the coke oven are conveyed to a gas-liquid separator along a gas pipeline, the raw coke oven gas after gas-liquid separation is discharged from the upper part and enters a plurality of horizontal tube primary coolers which are operated in parallel to be cooled in three sections. In order to ensure the cooling effect of the primary cooler, mixed liquid of tar and ammonia water is continuously sprayed on the upper section and the lower section, and hot ammonia water is used for periodically washing the top of the primary cooler to remove impurities such as tar, naphthalene and the like on the pipe wall, but the effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a coal gas cooling device, this cooling device adopt direct current passageway, runner wide, are convenient for wash, difficult scale deposit, and gas resistance is little, the cooling effect is good, and the heat transfer cooling does not have the dead angle, and better falls coal gas to the required temperature, is favorable to the operation of epilogue technology.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a coal gas cooling device, includes the casing, the upper end of casing is equipped with the coal gas entry, and lower extreme one side is equipped with the coal gas export, and the opposite side is equipped with the drain, top-down is provided with in the casing sprays layer, cooling zone and disconnected liquid layer, the cooling zone is equipped with cooling water entry, cooling water export, steam inlet and vapor outlet, disconnected liquid layer communicates with each other with the leakage fluid dram of locating the casing lateral wall, casing inner chamber bottom is equipped with the zone of heating that is used for heating sediment at casing bottom filth.

Further, the cooling section is a plate heat exchanger.

Further, the cooling section includes high temperature cooling section, at least one deck medium temperature cooling section and low temperature cooling section, the top of high temperature cooling section is equipped with sprays the layer, and the below is equipped with disconnected liquid layer, the top of medium temperature cooling section is equipped with sprays the layer, and the below is equipped with disconnected liquid layer, the top of low temperature cooling section is equipped with sprays the layer, and every section of high temperature cooling section, medium temperature cooling section and low temperature cooling section is equipped with cooling water inlet, cooling water outlet, steam inlet and vapor outlet respectively.

Furthermore, the high-temperature cooling section, the medium-temperature cooling section and the low-temperature cooling section have the same structure and respectively comprise a plate heat exchanger main body and a coal gas channel, the inner cavity of the plate heat exchanger main body is provided with a communicated cooling water channel, one end of the cooling water channel is communicated with a cooling water inlet, the other end of the cooling water channel is communicated with a cooling water outlet, and the coal gas channel is arranged between the adjacent cooling water channels; and the steam inlet and the steam outlet are communicated with the inner cavity of the cooling water channel.

Further, disconnected liquid layer includes baffle, coal gas opening and drainage plate, baffle all around with shells inner wall sealing connection, be equipped with a plurality of bar coal gas openings on the baffle, the coal gas opening is higher than the baffle upper surface and the logical groove that link up from top to bottom, and the top of coal gas opening is equipped with "V" type drainage plate of falling, the both sides lower part of drainage plate is connected with coal gas opening lateral wall through the support frame respectively.

Further, the layer that sprays is including being responsible for, the auxiliary pipe and spraying the liquid mouth, spray the liquid mouth and locate the casing outside, be responsible for one end and spray the liquid mouth intercommunication, be responsible for the lateral wall and be equipped with a plurality of auxiliary pipes, be equipped with a plurality of orifices that spray towards plate heat exchanger on every auxiliary pipe.

Furthermore, a gas distributor for uniformly distributing gas is arranged at the upper end in the shell.

The utility model has the advantages that:

1. the utility model discloses a cooling device top-down sets up the multilayer cooling section in the casing, and the multilayer cooling section forms coal gas direct current cooling channel in the casing, adopts direct current passageway, and the heat transfer does not have the dead angle, and the cooling effect is good, and just installs whole small, area is few, is convenient for transport and installation. The gas resistance is reduced, the cooling efficiency is improved, the cleaning is convenient, the scaling is avoided, and the method is beneficial to subsequent processes and blowers.

2. Because set up vapour and exit and spray the layer on the cooling zone, when the plate heat exchanger appearance impurity wall built-up was serious, got into circulation water channel through vapour, heated plate heat exchanger, impurity rethread top after the heating sprays the washing on the layer, has solved the difficulty that horizontal tubular cooler was difficult to wash in the past, has improved the cooling effect.

3. The liquid stopping layer is arranged on the lower portion of the cooling section, the plurality of strip-shaped gas channels on the liquid stopping layer guarantee smooth descending uniform distribution of gas, and the upper portion of each gas channel is provided with the drainage plate, so that the cooled gas is subjected to gas-liquid separation, liquid is prevented from descending along with the gas, and gas humidity is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic structural view of a liquid stopping layer;

FIG. 5 is a schematic structural view of a gas channel provided on a liquid stop layer;

fig. 6 is a schematic structural view of the spray layer.

In the figure:

the device comprises a shell 1, a gas inlet 2, a gas outlet 3, a spray layer 4, a main pipe 41, a spray liquid port 42, an auxiliary pipe 43, spray holes 44, a high-temperature cooling section 5, a plate heat exchanger main body 51, a cooling water channel 52, a gas channel 53, a medium-temperature cooling section 6, a low-temperature cooling section 7, a cooling water outlet 8, a cooling water inlet 9, a liquid stopping layer 10, a partition plate 101, a gas through port 102, a flow guiding plate 103, a support frame 104, a liquid discharging port 11, a steam inlet 12, a steam outlet 13, a heating layer 14 and a sewage discharging port 15.

Detailed Description

The gas cooling device of the present invention is described in detail below with reference to the attached drawings.

As shown in fig. 1 to 6, the utility model discloses a coal gas cooling device, including casing 1, casing 1's upper end is equipped with coal gas entry 2, and lower extreme one side is equipped with coal gas outlet 3, and coal gas reaches the uniform temperature and finally discharges from coal gas outlet 3 after cooling many times in getting into casing 1 through the entry, and casing 1's opposite side is equipped with drain 15, and casing 1 inner chamber is equipped with sprays layer 4, cooling zone, disconnected liquid layer 10 and zone of heating 14, and the cooling zone is the plate-type converter of welding at the casing inner chamber. The heating pipe of the heating layer 14 can heat the dirt deposited at the bottom of the shell 1, and the dirt is discharged from the sewage outlet 15 at one side after being melted. As shown in fig. 1, the cooling section includes a high-temperature cooling section 5, at least one middle-temperature cooling section 6 and a low-temperature cooling section 7, and the multiple cooling layers form a direct gas cooling channel in the housing. The top of high temperature cooling section 5 is equipped with sprays layer 4, is equipped with disconnected liquid layer 10 below, the top of medium temperature cooling section 6 is equipped with sprays layer 4, is equipped with disconnected liquid layer 10 below, the top of low temperature cooling section 7 is equipped with sprays layer 4, and every section of high temperature cooling section 5, medium temperature cooling section 6 and low temperature cooling section 7 is equipped with cooling water inlet 9, cooling water outlet 8, vapour entry 12 and vapour export 13 respectively. The liquid stopping layer 10 is communicated with a liquid outlet 11 arranged on the side wall of the shell 1, and the liquid stopping layer is arranged to ensure that the coal gas flows from top to bottom and can collect and discharge liquid generated in the process of cooling the coal gas.

The shell 1 can be spliced in a sectional mode, different numbers of cooling sections can be arranged in the inner cavity of the shell from top to bottom according to different sizes and process requirements of the shell 1, and the temperature of the cooled coal gas discharged from the coal gas outlet can be guaranteed to be 21-22 ℃.

The high-temperature cooling section 5, the medium-temperature cooling section 6 and the low-temperature cooling section 7 are identical in structure and respectively comprise a plate heat exchanger main body 51 and a coal gas channel 53, the inner cavity of the plate heat exchanger main body 51 is provided with a cooling water channel 52 which is communicated, one end of the cooling water channel 52 is communicated with a cooling water inlet 9, the other end of the cooling water channel 52 is communicated with a cooling water outlet 8, the coal gas channel 53 is arranged between the adjacent cooling water channels 52, and the coal gas is subjected to heat exchange and cooling through cooling water flowing in the plate heat exchanger. The water temperature after heat exchange of the high-temperature cooling section is higher, and the high-temperature cooling section can be used for heating in winter. The steam inlet 12 and the steam outlet 13 are both communicated with the inner cavity of the cooling water channel 52, as shown in fig. 1, the steam inlet 12 and the steam outlet 13 are arranged at one end of the cooling section, and in use, the cooling water inlet and the cooling water outlet can be used as the steam inlet and the steam outlet, and the steam channel and the cooling water channel are the same channel. The main effect of setting up vapour entry and export is that, because the phenomenon that can produce tar and buggy wall built-up after plate heat exchanger work for a certain time, the condition that coal gas passageway blockked up appears easily, heats the precipitate of plate heat exchanger wall built-up through carrying vapour, and the precipitate rethread upper portion after melting sprays the layer, will play the effect of wasing plate heat exchanger outer wall, guarantees the cooling efficiency of whole equipment.

As shown in fig. 4 and 5, the liquid blocking layer 10 includes a partition plate 101, gas through holes 102, a flow guide plate 103 and a support frame 104, the periphery of the partition plate 101 is hermetically connected with the inner wall of the casing 1 to prevent gas leakage, the partition plate 101 is provided with a plurality of strip-shaped gas through holes 102, the gas through holes 102 are through grooves which are higher than the upper surface of the partition plate and are vertically through, an inverted V-shaped flow guide plate 103 is arranged above the gas through holes 102, and the lower parts of the two sides of the flow guide plate 103 are respectively connected with the side walls of the gas through holes 102 through the support frame 104. The coal gas is cooled by the cooling section and then flows downwards to the liquid breaking layer 10, the liquid breaking layer 10 plays a role in gas-liquid separation, the separated coal gas continuously flows downwards through a coal gas through hole in the partition plate, and the liquid baffled by the drainage plate flows onto the partition plate and is finally discharged through a liquid discharge hole 11 in the side wall of the shell 1.

As shown in fig. 6, the pipeline that sprays layer 4 is the dendritic range, and wherein including one be responsible for 41, spray liquid mouth 42 and many auxiliary pipes 43, spray liquid mouth 42 and locate the casing 1 outside, be responsible for 41 one end and spray liquid mouth 42 intercommunication, be responsible for 41 lateral walls and be equipped with many auxiliary pipes 43, the auxiliary pipe 43 inner chamber will lead to with being responsible for 41 inner chambers, is equipped with a plurality of spray orifices 44 or the shower nozzle that spray towards plate heat exchanger on every auxiliary pipe 43, carries out regular washing to the cooling zone through spraying hot ammonia water light tar to clear away impurity such as tar, naphthalene on the outer wall, improve the cooling effect.

The working principle is as follows:

(1) cooling down

The raw gas generated by coking of the coke oven in the coal chemical industry is sprayed by high-pressure ammonia water to be reduced from 800 ℃ to 82 ℃, the raw gas is guided by a blower to enter the cooling device through a pipeline, the gas entering the shell 4 from the gas inlet 2 firstly uniformly distributes through a gas distributor and then descends to the high-temperature cooling section 5, and the gas cooled by the high-temperature cooling section 5 continues descending. The gas cooled by the high-temperature cooling layer is subjected to primary gas-liquid separation through the liquid stopping layer 10, the gas subjected to gas-liquid separation continuously flows downwards to the medium-temperature cooling section 6, and the liquid subjected to gas-liquid separation is collected and discharged through the liquid stopping layer 10. The gas after primary gas-liquid separation continuously descends to the medium-temperature cooling section 6, is cooled by the medium-temperature cooling section, and the gas cooled by the medium-temperature cooling section continuously descends. The gas cooled by the medium temperature cooling section is subjected to secondary gas-liquid separation through the liquid breaking layer, the gas subjected to the secondary gas-liquid separation flows downwards to the low temperature cooling section 7, and the liquid subjected to the secondary gas-liquid separation is collected and discharged from the liquid breaking layer 10. The gas after the secondary gas-liquid separation continues to flow downwards to the low-temperature cooling section 7, and the gas cooled by the low-temperature cooling section is discharged from a gas outlet 3 on the side wall of the shell 1 and enters a subsequent working section.

The temperature of the coal gas is reduced to 21 ℃ from 82 ℃ after multi-section cooling; the temperature of the circulating water of the high-temperature cooling layer 5 is between 70 and 65 ℃, the high-temperature circulating water can be used for heating, and the pressure of the supplied heating water is more than or equal to 0.5 MPa. The temperature of the circulating water of the medium-temperature cooling layer 6 is between 32 and 28 ℃, and the water pressure of the medium-temperature water is 0.35 to 0.45 MPa. The temperature of the circulating water of the low-temperature cooling layer 7 is 16-18 ℃, the water pressure of the low-temperature water is 0.3-0.5 MPa, and the energy is fully utilized while the coal gas cooling effect is ensured.

(2) Cleaning the substrate

In order to guarantee the normal operation of the equipment when the cooling device is used, the equipment adopts dual-purpose equipment, when the standby cooler is cleaned, in order to facilitate the maintenance of each device in the shell, an access hole which is convenient for workers to go in and out is arranged at the corresponding position of the shell, and the normal operation of the equipment is guaranteed. Can observe each cooling layer filth wall built-up condition through the access hole, when needs wash the cooling layer, close the water inlet of cooling layer, open vapor inlet 12, make vapour advance along cooling water passageway 52, the circulation water passageway of walking is heated to the vapour this moment, the filth of the outside wall built-up of plate heat exchanger is after heating, the layer 4 that sprays of rethread top sprays, tar liquid after spraying is blockked and is discharged through leakage fluid dram 11 by the baffle of disconnected liquid layer, realize the purpose of wasing the cooling layer, the problem that the past cooler wall built-up was difficult to wash has been solved, the cooling effect has been improved. The heating pipe 14 at the bottom of the inner cavity of the shell 1 is used for heating the dirt settled at the bottom periodically, and the heated dirt is discharged from the sewage discharge port 15.

The utility model discloses a cooling device is small, area is few, and the transportation and the installation of being convenient for adopt direct current channel, and the heat transfer does not have the dead angle, and the cooling effect is good and be convenient for wash not scale deposit, and gas resistance is little, and is favorable to subsequence technology and air-blower.

The foregoing is merely illustrative of some of the principles of the present invention and the description is not intended to limit the invention to the specific constructions and applications shown, so that all modifications and equivalents that may be utilized are within the scope of the invention.

Other technical features than those described in the specification are known to those skilled in the art.

Claims

1. The utility model provides a coal gas cooling device, includes the casing, the upper end of casing is equipped with the coal gas entry, and lower extreme one side is equipped with the coal gas export, and the opposite side is equipped with the drain, characterized by, top-down is provided with in the casing sprays layer, cooling zone and disconnected liquid layer, the cooling zone is equipped with cooling water entry, cooling water export, vapour inlet and vapour export, disconnected liquid layer communicates with each other with the leakage fluid dram of locating the casing lateral wall, casing inner chamber bottom is equipped with the zone of heating that is used for heating the sediment at casing bottom filth.

2. The gas cooling device according to claim 1, wherein said cooling section is a plate heat exchanger.

3. The gas cooling device according to claim 1 or 2, wherein the cooling section comprises a high-temperature cooling section, at least one layer of medium-temperature cooling section and a low-temperature cooling section, a spraying layer is arranged above the high-temperature cooling section, a liquid breaking layer is arranged below the high-temperature cooling section, a spraying layer is arranged above the medium-temperature cooling section, a liquid breaking layer is arranged below the medium-temperature cooling section, a spraying layer is arranged above the low-temperature cooling section, and each of the high-temperature cooling section, the medium-temperature cooling section and the low-temperature cooling section is provided with a cooling water inlet, a cooling water outlet, a steam inlet and a steam outlet.

4. The gas cooling device according to claim 3, wherein the high temperature cooling section, the medium temperature cooling section and the low temperature cooling section have the same structure and respectively comprise a plate heat exchanger body and a gas channel, the inner cavity of the plate heat exchanger body is provided with a cooling water channel which is communicated, one end of the cooling water channel is communicated with a cooling water inlet, the other end of the cooling water channel is communicated with a cooling water outlet, and the gas channel is arranged between the adjacent cooling water channels; and the steam inlet and the steam outlet are communicated with the inner cavity of the cooling water channel.

5. The gas cooling device according to claim 3, wherein the liquid stopping layer comprises a partition plate, gas through holes and a flow guiding plate, the periphery of the partition plate is connected with the inner wall of the shell in a sealing mode, the partition plate is provided with a plurality of strip-shaped gas through holes, the gas through holes are through grooves which are higher than the upper surface of the partition plate and are communicated up and down, an inverted V-shaped flow guiding plate is arranged above the gas through holes, and the lower portions of two sides of the flow guiding plate are respectively connected with the side walls of the gas through holes through supporting frames.

6. The gas cooling device according to claim 3, wherein the spray layer comprises a main pipe, a secondary pipe and a spray liquid port, the spray liquid port is arranged outside the shell, one end of the main pipe is communicated with the spray liquid port, the side wall of the main pipe is provided with a plurality of secondary pipes, and each secondary pipe is provided with a plurality of spray holes spraying towards the plate heat exchanger.

7. The gas cooling device according to claim 1 or 2, wherein a gas distributor for uniformly distributing gas is provided at an upper end of the housing.