CN108998103B - Method and device for improving quality of condensate circulating of horizontal pipe primary cooler - Google Patents
Method and device for improving quality of condensate circulating of horizontal pipe primary cooler Download PDFInfo
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- CN108998103B CN108998103B CN201810897034.3A CN201810897034A CN108998103B CN 108998103 B CN108998103 B CN 108998103B CN 201810897034 A CN201810897034 A CN 201810897034A CN 108998103 B CN108998103 B CN 108998103B
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/06—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials combined with spraying with water
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Abstract
The invention relates to a method and a device for improving the quality of circulating condensate of a transverse pipe primary cooler, and the method and the device comprise a square groove, a water-sealed tank, a lower-section outer discharge pipe, a cleaning pump, an outer discharge communicating pipe, a liquid discharge pipe, an upper-section condensate return header pipe, a lower-section condensate return header pipe, a cleaning pump outlet header pipe communicating pipe, a cleaning oil outer discharge communicating pipe and a cleaning standby pipe, wherein the lower-section pump outlet is connected with the lower-section outer discharge pipe; the inlet of the upper pump is connected with the square groove through a cleaning spare pipe. The advantages are that: the condensate process is optimized, and the quality of the circulating condensate is improved.
Description
Technical Field
The invention relates to the field of coking, in particular to a method and a device for improving the quality of a condensate circulating in a transverse pipe primary cooler.
Background
See figure 1, the process of the horizontal pipe primary cooler part in the cooling procedure:
1. 5 transverse pipe primary coolers connected in parallel are the first set of key devices for cooling clean gas in a recovery operation area, and crude gas at the temperature of 80 ℃ in front of the device is cooled to 18 ℃ to 22 ℃ behind the device. The coal gas enters from the top, the inside of the primary cooler is provided with a cooling water pipe bundle, the upper section is cooled by circulating water, and the lower section is cooled by low-temperature water. The convergence temperature of the 5 primary cooler coal gas outlets, namely the 'convergence temperature', is a key process parameter of the blast cooling process of the recovery operation area, and directly influences the operation conditions of the process and the subsequent processes.
2. The low-melting-point fractions such as naphthalene, acenaphthene and the like carried in the raw gas are very easy to cause the shell pass blockage of the primary cooler, and the gas conveying resistance is increased, so that the condensate is continuously sprayed on the upper/lower sections of the primary cooler to clean the gas, the condensate sprayed with the gas firstly enters the corresponding gas water seal tank through the upper/lower section return pipelines of the primary cooler, then fully flows into the upper/lower section condensate tank, finally, the upper/lower section pump is used for returning the upper/lower section spray pipes of the primary cooler to circularly spray the gas, and the redundant condensate is continuously discharged out of the mechanical ammonia water clarifying tank. Wherein the condensate is liquid obtained by repeatedly spraying ammonia water on the coal gas. During production, 1 upper pump and 1 lower pump are operated.
See fig. 1, the existing horizontal tube primary cooler condensate circulating process has the following defects:
1. only the upper section of condensate liquid is provided with an external discharge pipeline, and the lower section of condensate liquid can only flow to the upper section of condensate liquid tank through the full flow pipe between the upper section of condensate liquid tank and the lower section of condensate liquid tank to be discharged. As the gas enters from the top of the primary cooler, the temperature of the lower section of the primary cooler is lower, most of naphthalene in the gas is concentrated in condensate of the lower section, and the operation influences the quality of the circulating condensate and restricts the gas cleaning effect.
2. Lack solitary condensate or clean primary cooler liquid receiving tank, the ammonia water is cleaned the time of the primary cooler upper segment in order to guarantee to clean the abundant replacement of back liquid and need to close primary cooler upper segment backflow pipeline valve, cleans hot ammonia water and discharges from the inside full flow of primary cooler to the primary cooler hypomere and then get into hypomere condensate tank outward through primary cooler middle section straw cap layer structure, and this operation requirement stops that whole 5 primary cooler hypomere condensates spray, easily leads to the blocking of primary cooler hypomere.
3. Lack of washing oil to clean primary cooler equipment and supporting process piping is difficult to create good operating environment for changing the inside tube bank of primary cooler and overhauing.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a method and a device for improving the quality of the circulating condensate of a transverse pipe primary cooler, which ensure the effect of spraying clean coal gas, reduce the resistance of coal gas equipment and meet the process requirements of the process and the subsequent process; the service life of key equipment in the cooling process is prolonged, the maintenance frequency is reduced, and the cost is reduced.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a device for improving the quality of circulating condensate of a transverse pipe primary cooler comprises an upper section condensate tank, a lower section condensate tank, an upper section pump outlet header pipe, a lower section pump outlet header pipe, a hot ammonia water header pipe, a primary cooler upper section backflow pipe, a primary cooler lower section backflow pipe, an upper section pump, a lower section pump and an upper section external discharge pipe, wherein the primary cooler upper section backflow pipe is connected with the upper section condensate tank through an upper section gas water seal tank, the upper section condensate tank is connected with the upper section pump, the upper section pump outlet header pipe is connected with the upper section pump, the primary cooler lower section backflow pipe is connected with the lower section condensate tank through a lower section gas water seal tank, the lower section condensate tank is connected with the lower section pump, the lower section pump outlet header pipe is connected with the lower section pump, and the upper,
the device also comprises a square groove, a water-sealed tank, a lower section outer discharge pipe, a cleaning pump, an outer discharge communicating pipe, a liquid discharge pipe, an upper section condensate return header pipe, a lower section condensate return header pipe, a cleaning pump outlet header pipe, a cleaning oil outer discharge communicating pipe and a cleaning standby pipe, wherein the lower section pump outlet is connected with the lower section outer discharge pipe, the outer discharge communicating pipe is connected between the lower section outer discharge pipe and the upper section outer discharge pipe, a square groove is installed near the lower section condensate groove, the water-sealed tank is arranged in the square groove, the top of the square groove is connected with the lower section condensate groove through the liquid discharge pipe to prevent washing oil from overflowing during operation, the lower section reflux pipe of the primary cooler is connected with the water-sealed tank through the lower section condensate return header pipe, the upper section reflux pipe of the primary cooler is connected with the lower section condensate return header pipe through the upper section condensate return pipe, The upper-section outer discharge pipe is connected with the top of the square groove; the inlet of the upper pump is connected with the square groove through a cleaning spare pipe.
The outlet of the cleaning pump is respectively connected with the upper and lower sections of spraying pipes from the hot ammonia water main pipe to the primary cooler through 3 pipelines and valves.
The inlet of the scavenging pump is connected with an independent unloading crane pipe.
A method for improving the quality of condensate circulating in a cross tube primary cooler comprises the following steps:
1) normal operation of the primary cooler:
operating 2 upper pumps and 1 lower pump, setting the liquid level of an upper condensate tank to 1350-1450 mm, enabling the upper reflux condensate of the primary cooler to respectively enter 5 upper gas water seal tanks correspondingly and then flow to the upper condensate tank, continuously spraying the upper section of the primary cooler through the upper pumps, and automatically discharging the upper section of the primary cooler to a mechanical ammonia water clarifying tank through an upper discharge pipe according to the actual liquid level of the upper condensate tank; the lower section reflux condensate of the primary cooler respectively enters 5 lower section gas water seal tanks correspondingly and then flows to a lower section condensate tank fully, is continuously sprayed to the lower section of the primary cooler through a lower section pump, and is manually discharged to a mechanized ammonia water clarifying tank through a lower section pump from a lower section discharge pipe; the upper section of the condensate liquid and the lower section of the condensate liquid tank are not in full flow, and the upper section of the condensate liquid and the lower section of the condensate liquid are both discharged separately;
2) cleaning the upper section of the primary cooler by hot ammonia water:
and (3) closing a gas outlet valve of the primary cooler to be cleaned, emptying an upper section circulating water pipe bundle, enabling the cleaned liquid to directly enter the square trough through an upper section condensate return header pipe and a lower section condensate return header pipe of the primary cooler without returning to the upper section condensate trough through a switching valve, operating a cleaning pump to ensure that the upper section condensate is automatically discharged outside, discharging the liquid in the square trough to a mechanized ammonia water clarifying trough through an outer discharge communicating pipe and a lower section outer discharge pipe, normally operating the other 4 primary coolers, and recovering the operation mode of the step 1) after cleaning.
3) The hot ammonia water cleans the lower section of the primary cooler:
and (3) closing a gas outlet valve of the primary cooler to be cleaned, emptying the lower-section low-temperature water pipe bundle, enabling the cleaned liquid to directly enter the square trough through the lower-section condensate return header pipe without returning to the lower-section condensate trough through switching the valve, operating the cleaning pump to discharge the liquid in the square trough to the mechanized ammonia water clarifying tank through the lower-section discharge pipe through the discharge communicating pipe, normally operating the other 4 primary coolers, and recovering the operation mode of the step 1) after cleaning.
4) Cleaning the upper section of the primary cooler with washing oil before maintenance:
closing a gas outlet/inlet pipeline valve of the primary cooler to be cleaned and blocking a blind plate, emptying an upper-section circulating water pipe bundle and introducing steam, closing an upper-section spray valve of the primary cooler to be cleaned and a top-section hot ammonia water spray valve, loading washing oil in a tank car into a square groove by using a cleaning pump, spraying the washing oil to the upper section of the primary cooler by switching an outlet header pipe of the cleaning pump and an upper valve of the hot ammonia water header pipe, directly entering the square groove into the upper section of the primary cooler through an upper-section condensate return header pipe and a lower-section condensate return header pipe after cleaning and repeatedly and circularly spraying, not discharging the washing oil to the upper section of the primary cooler during cleaning by the hot washing oil, and discharging the washing oil to a mechanized ammonia water clarifying tank through the discharging mode of the step 2) after cleaning.
5) Cleaning the lower section of the primary cooler by washing oil before overhauling:
closing a gas outlet/inlet pipeline valve of the primary cooler to be cleaned and blocking a blind plate, emptying a lower-section low-temperature water pipe bundle and introducing steam, closing a lower-section spray pipe valve of the primary cooler to be cleaned, filling washing oil in a tank car into a square tank by using a cleaning pump, spraying the washing oil to the lower section of the primary cooler by switching an upper valve of a cleaning pump outlet header pipe and a hot ammonia water header pipe, directly entering the square tank through a lower-section condensate return header pipe to spray repeatedly and circularly after cleaning, not discharging the washing oil to the lower section of the primary cooler during cleaning of the washing oil, discharging the washing oil to a mechanized ammonia water clarifying tank in a discharging mode of the step 3) after cleaning, and executing the step 3) to ensure.
Compared with the prior art, the invention has the beneficial effects that:
the invention improves the condensate circulating device of the transverse pipe primary cooler, optimizes the condensate process, improves the quality of the circulating condensate, ensures the effect of spraying and cleaning coal gas, reduces the resistance of coal gas equipment, and prolongs the service life of key equipment in the cooling process.
The concrete advantages are that:
1. the process of full flow of the original lower section condensate tank to the upper section condensate tank is changed, the independent discharge of the upper/lower section condensate is realized, the quality of the circulating condensate is improved, and the cleaning effect of the coal gas is improved. 2 upper pumps run simultaneously, and the technological requirement of continuously spraying the condensate on the upper section of the transverse pipe primary cooler is met.
2. And condensate receiving equipment and an auxiliary process pipeline are added, so that all functions of cleaning the primary cooler by washing oil and cleaning the upper/lower sections of the primary cooler are realized, the operation of other primary coolers is not influenced, and the process requirements are met.
3. The quality of the circulating condensate of the primary cooler can be ensured, the gas cleaning effect of the condensate is further improved, the resistance of the transverse pipe primary cooler is reduced, the service life of key equipment in the blast cooling process is prolonged, and the efficiency is increased by 20 ten thousand yuan/year.
Drawings
FIG. 1 is a process structure diagram of condensate circulation of an original transverse pipe primary cooler.
FIG. 2 is a process structure diagram of condensate circulation of the cross-tube primary cooler of the present invention.
In the figure: 1-lower section pump outlet header pipe 2-upper section pump outlet header pipe 3-primary cooler lower section return pipe 4-primary cooler upper section return pipe 5-lower section condensate tank 6-upper section condensate tank 7-hot ammonia water header pipe 8-full flow pipe 9-1# lower section pump 10-2# lower section pump 11-1# upper section pump 12-2# upper section pump 13-upper section discharge pipe 14-square groove 15-water seal tank 16-scavenging pump 17-upper section gas water seal tank
The method comprises the following steps of firstly, arranging an outer discharge pipe on the lower section, arranging an outer discharge communicating pipe, arranging a washing oil outer discharge communicating pipe, arranging a communicating pipe to a cleaning pump outlet main pipe, arranging a liquid discharge pipe, cleaning a spare pipe, arranging a condensate reflux main pipe on the lower section, arranging a condensate reflux main pipe on the upper section, cleaning a pump outlet main pipe a to o, and arranging a valve.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, but it should be noted that the present invention is not limited to the following embodiments.
See fig. 2, a device for improving horizontal pipe primary cooler circulating condensate quality, including upper segment condensate groove 6, hypomere condensate groove 5, upper segment pump outlet header 2, hypomere pump outlet header 1, hot ammonia water header 7, primary cooler upper segment back flow 4, primary cooler hypomere back flow 3, the upper segment pump, the hypomere pump, upper segment outer discharge pipe 13, upper segment pump outlet header 2, primary cooler upper segment back flow 4 is connected with upper segment condensate groove 6, upper segment condensate groove 6 is connected with the upper segment pump, upper segment pump outlet header 2 is connected with the upper segment pump, hypomere condensate groove 5 is connected with the hypomere pump, hypomere pump outlet header 1 is connected with the hypomere pump, upper segment outer discharge pipe 13 is connected with the upper segment pump, be connected with full flow pipe 8 between upper segment condensate groove 6 and the hypomere condensate groove 5.
On the basis, a square groove 14, a water seal tank 15, a lower-section external discharge pipe I, a cleaning pump 16, an external discharge communicating pipe II, a liquid discharge pipe III, an upper-section condensate reflux main pipe III, a lower-section condensate reflux main pipe III, a cleaning pump outlet main pipe IV, and a lower-section discharge pipe and a valve a which are directly discharged to a mechanized ammonia water clarifying tank are additionally arranged in front of an outlet valve of the 2# lower-section pump 10; a process pipeline, a valve c and a valve d are added in front of an outlet valve of the No. 1 upper pump 11 and connected to the front of an automatic regulating valve of an original upper outer discharge pipe 13; an outward discharge communicating pipe (II), a valve (g) and a valve (b) are added behind the valve (c) and are connected to the valve (a) of the lower-section outward discharge pipe (I).
A square groove 14 is arranged near the lower section condensate tank 5, a water seal tank 15 is arranged in the square groove 14, and the square groove 14 is mainly used for independently containing liquid after cleaning the primary cooler and avoiding the liquid after cleaning to return to the upper/lower section condensate tank. The lateral wall of the top of the square groove 14 is added with a liquid discharge pipe and a valve k which are connected to the top of the lower section condensate tank 5 and used for discharging liquid to the lower section condensate tank 5 under special conditions to prevent overflow.
The lower section backflow pipe 3 of the primary cooler is connected with the water-sealed tank 15 through a lower section condensate backflow header pipe which is connected to the bottom of the water-sealed tank 15 of the square groove 14. And a process pipeline and a valve p multiplied by 5 are additionally arranged from a condensate reflux pipeline at the lower section of the primary cooler to the front of a gas water seal tank valve at the lower section of the primary cooler and are respectively connected with a condensate reflux main pipe at the lower section of the primary cooler. Correspondingly, an upper section condensate reflux main pipe (b) is added at the top of the upper section gas water seal tank (17) and is connected with a lower section condensate reflux main pipe (c). The newly added process pipeline and the valve qX 5 before the upper section condensate of the primary cooler flows back to the upper section gas water seal tank 17 valve are respectively connected with an upper section condensate return header pipe (b).
The bottom of the square groove 14 is provided with a scavenging pump 16, the inlet of the scavenging pump 16 is connected with the bottom of the square groove 14 through a pipeline and a valve j, and the inlet of the scavenging pump 16 is provided with a separate unloading crane pipe. The outlet tee joint of the scavenging pump 16: a communicating pipe (c) to a cleaning pump outlet main pipe and valves (m, n) are connected with the cleaning pump outlet main pipe, wherein the cleaning pump outlet main pipe is connected with a hot ammonia water main pipe 7 through an additional pipeline and a valve (o x 3), and the connection point is positioned behind three branch valves of the hot ammonia water main pipe; the washing oil discharge pipeline (c) and the valves (l, f) are connected to the front pipeline of the valve (d); the process pipeline and the valve r are used when being connected to the top of the square groove 14 for unloading.
And adding a pipeline and a valve e behind the inlet valve of the No. 1 upper pump 11, adding cleaning spare pipes and valves i and h at the bottom of the square groove 14, wherein the cleaning spare pipes are used for cleaning the No. 1 upper pump 11, and the blind plate is blocked at the flange at the tail end of the pipeline where the valve e is located. The upper pump and the lower pump are 2.
A method for improving the quality of condensate circulating in a cross tube primary cooler comprises the following steps:
firstly, normal operation of a primary cooler:
1. and (3) operating the 1# upper pump 11 and the 2# upper pump 12, opening inlet and outlet valves of the 1# upper pump 11 and the 2# upper pump 12, and closing the valve c.
2. And (3) operating the No. 2 lower stage pump 10, opening the inlet and outlet valves of the No. 2 lower stage pump 10, opening the valve a and closing the valve b.
3. And (3) closing the valve qx 5, setting the liquid level of the upper condensate tank 6 to 1350 mm-1450 mm by the upper condensate discharge automatic regulating valve, and correspondingly feeding the upper reflux condensate of the primary cooler into 5 upper gas water seal tanks 17 respectively so as to flow fully to the upper condensate tank 6 for cyclic spraying and automatically discharging according to the actual liquid level of the upper condensate tank 6.
4. And (3) closing the valve p multiplied by 5, and enabling the lower-section backflow condensate of the primary cooler to respectively enter 5 lower-section gas water seal tanks correspondingly so as to flow to the lower-section condensate tank 5 in a full flow mode and be discharged out manually.
5. The upper section condensate tank 6 and the lower section condensate tank 5 are not in full flow.
Secondly, cleaning the upper section of the primary cooler by hot ammonia water:
1. closing a valve of a gas outlet pipeline opening of a primary cooler to be cleaned, closing a valve of a circulating water supply/return pipeline at the upper section of the primary cooler to be cleaned and emptying the valve, closing a spray pipe valve at the upper section of the primary cooler to be cleaned and a hot ammonia water spray valve at the top section, closing a pipeline valve of a gas water seal tank to which the upper section of the primary cooler to be cleaned flows back, spraying ammonia water to the upper section of the primary cooler to be cleaned through a hot ammonia water header pipe, opening a valve q x 1 of an upper section condensate return header pipe, opening a valve 7 of the hot ammonia water header pipe to the spray pipe valve at the upper section of the primary cooler to be cleaned, allowing liquid to return to the square groove 14 through the lower section condensate return header pipe and the upper section condensate return header pipe without returning to the upper section condensate groove 6 after the upper.
2. The 1# upper stage pump 11, the 2# upper stage pump 12, and the 2# lower stage pump 10 were operated.
3. And opening the valve l, the valve f, the valve g and the valve b, closing the valve c and the valve d, operating the cleaning pump, and discharging the liquid cleaned in the square tank to a mechanized ammonia water clarifying tank through the hot washing oil outer discharge pipe and the outer discharge communicating pipe through the lower-section outer discharge pipe.
Thirdly, cleaning the lower section of the primary cooler by hot ammonia water:
1. closing a gas outlet pipeline valve of the primary cooler to be cleaned, closing a low-temperature water supply/return pipeline valve at the lower section of the primary cooler to be cleaned and emptying, closing a spray pipe valve at the lower section of the primary cooler to be cleaned, closing a pipeline valve at the lower section of the primary cooler to be cleaned and returning to a corresponding gas water seal tank, opening a condensate reflux main pipe valve p multiplied by 1 at the lower section, opening a hot ammonia water main pipe 7 to a spray pipe valve at the lower section of the primary cooler to be cleaned, and after the lower section of the primary cooler to be cleaned, returning liquid to the square tank 14 through the condensate reflux main pipe at the lower section, and not returning to the condensate tank 5 at.
2. The 1# upper stage pump 11, the 2# upper stage pump 12, and the 2# lower stage pump 10 were operated.
3. And opening the valve l, the valve f, the valve g and the valve b, closing the valve c and the valve d, operating the cleaning pump, and discharging the liquid cleaned in the square tank to a mechanized ammonia water clarifying tank through the hot washing oil outer discharge pipe and the outer discharge communicating pipe through the lower-section outer discharge pipe.
Fourthly, cleaning the upper section of the primary cooler by washing oil before maintenance:
1. and closing a gas outlet/inlet pipeline of the primary cooler to be cleaned, closing a circulating water supply/return pipeline valve at the upper section of the primary cooler to be cleaned, emptying and introducing steam, closing a spraying valve at the upper section of the primary cooler to be cleaned and a top section hot ammonia water spraying valve, closing a pipeline valve of the primary cooler to be cleaned, returning to the corresponding gas water seal tank, and opening an upper section condensate return header pipe to be q multiplied by 1.
2. The scavenging pump is operated to load the wash oil in the tank car into the square tank 14.
3. Opening valve m, valve n, opening and waiting to clean the primary cooler and clean pump outlet house steward nine to hot ammonia water house steward 7 pipeline valve o x 1, closing valve l, the washing oil is no longer arranged outward during cleaning the primary cooler, the operation cleans pump 16, the square trough interior washing oil gets into through to cleaning pump outlet house steward communicating pipe four and cleans pump outlet house steward nine and then gets into and waits to clean the primary cooler upper segment and spray.
4. And after cleaning the washing oil, executing the step of cleaning the upper section of the primary cooler by hot ammonia water.
5. The other 4 primary coolers normally run during the cleaning period.
Fifthly, cleaning the lower section of the primary cooler by washing oil before maintenance:
1. and closing a gas outlet/inlet pipeline of the primary cooler to be cleaned, closing a low-temperature water supply/return pipeline valve at the lower section of the primary cooler to be cleaned, emptying and introducing steam, closing a spraying valve at the lower section of the primary cooler to be cleaned, closing a pipeline valve at the lower section of the primary cooler to be cleaned, returning to the corresponding gas water seal tank, and opening a condensate reflux header pipe at the lower section to a valve p multiplied by 1.
2. The scavenging pump is operated to load the wash oil in the tank car into the square tank 14.
3. Opening valve m, valve n, opening and waiting to clean the primary cooler and clean pump outlet house steward nine to hot ammonia water house steward 7 pipeline valve o x 1, closing valve l, the washing oil is no longer arranged outward during cleaning the primary cooler, the operation cleans pump 16, the square inslot washing oil gets into through to clean pump outlet house steward communicating pipe four and cleans pump outlet house steward nine and then the entering waits to clean the primary cooler hypomere and sprays.
4. And after the oil washing and cleaning, executing the step of cleaning the lower section of the primary cooler by hot ammonia water.
5. The other 4 primary coolers normally run during the cleaning period.
Claims (1)
1. A method for improving the quality of circulating condensate of a transverse pipe primary cooler comprises an upper section condensate tank, a lower section condensate tank, an upper section pump outlet header pipe, a lower section pump outlet header pipe, a hot ammonia water header pipe, a primary cooler upper section backflow pipe, a primary cooler lower section backflow pipe, an upper section pump, a lower section pump and an upper section outer discharge pipe, wherein the primary cooler upper section backflow pipe is connected with the upper section condensate tank through an upper section gas water seal tank; the device also comprises a square groove, a water-sealed tank, a lower section outer discharge pipe, a cleaning pump, an outer discharge communicating pipe, a liquid discharge pipe, an upper section condensate return header pipe, a lower section condensate return header pipe, a cleaning pump outlet header pipe, a cleaning oil outer discharge communicating pipe and a cleaning standby pipe, wherein the lower section pump outlet is connected with the lower section outer discharge pipe, the outer discharge communicating pipe is connected between the lower section outer discharge pipe and the upper section outer discharge pipe, a square groove is installed near the lower section condensate groove, the water-sealed tank is arranged in the square groove, the top of the square groove is connected with the lower section condensate groove through the liquid discharge pipe to prevent washing oil from overflowing during operation, the lower section reflux pipe of the primary cooler is connected with the water-sealed tank through the lower section condensate return header pipe, the upper section reflux pipe of the primary cooler is connected with the lower section condensate return header pipe through the upper section condensate return pipe, The upper-section outer discharge pipe is connected with the top of the square groove; the inlet of the upper pump is connected with the square groove through a cleaning spare pipe;
the method for improving the quality of the condensate circulating of the transverse pipe primary cooler is characterized by comprising the following steps of:
1) normal operation of the primary cooler:
operating 2 upper pumps and 1 lower pump, setting the liquid level of an upper condensate tank to 1350-1450 mm, enabling the upper reflux condensate of the primary cooler to respectively enter 5 upper gas water seal tanks correspondingly and then flow to the upper condensate tank, continuously spraying the upper section of the primary cooler through the upper pumps, and automatically discharging the upper section of the primary cooler to a mechanical ammonia water clarifying tank through an upper discharge pipe according to the actual liquid level of the upper condensate tank; the lower section reflux condensate of the primary cooler respectively enters 5 lower section gas water seal tanks correspondingly and then flows to a lower section condensate tank fully, is continuously sprayed to the lower section of the primary cooler through a lower section pump, and is manually discharged to a mechanized ammonia water clarifying tank through a lower section pump from a lower section discharge pipe; the upper section of the condensate liquid and the lower section of the condensate liquid tank are not in full flow, and the upper section of the condensate liquid and the lower section of the condensate liquid are both discharged separately;
2) cleaning the upper section of the primary cooler by hot ammonia water:
closing a gas outlet valve of a primary cooler to be cleaned, emptying an upper section circulating water pipe bundle, enabling cleaned liquid to directly enter the square trough through an upper section condensate return header pipe and a lower section condensate return header pipe of the primary cooler and not return to an upper section condensate trough through a switching valve, operating a cleaning pump to ensure that the upper section condensate is automatically discharged outside, discharging liquid in the square trough to a mechanized ammonia water clarifying trough through an outer discharge communicating pipe and through a lower section outer discharge pipe, and recovering the operation mode of the step 1) after cleaning, wherein the rest 4 primary coolers normally operate;
3) the hot ammonia water cleans the lower section of the primary cooler:
closing a gas outlet valve of the primary cooler to be cleaned, emptying a lower-section low-temperature water pipe bundle, enabling the cleaned liquid to directly enter the square trough through a lower-section condensate return header pipe by switching valves without returning to a lower-section condensate trough, operating a cleaning pump to discharge the liquid in the square trough to a mechanized ammonia water clarifying trough through an outer discharge communicating pipe and a lower-section outer discharge pipe, normally operating the other 4 primary coolers, and recovering the operation mode of the step 1) after cleaning;
4) cleaning the upper section of the primary cooler with washing oil before maintenance:
closing a pipeline valve of a coal gas inlet and outlet of a primary cooler to be cleaned and plugging a blind plate, emptying an upper section of circulating water pipe bundle and introducing steam, closing an upper section of spraying valve and a top section of hot ammonia water spraying valve of the primary cooler to be cleaned, loading washing oil in a tank car into a square groove by using a cleaning pump, spraying the washing oil to the upper section of the primary cooler by switching an outlet header pipe of the cleaning pump and an upper valve of a hot ammonia water header pipe, directly entering the square groove through an upper section of condensate return header pipe and a lower section of condensate return header pipe after cleaning and repeatedly and circularly spraying, wherein the washing oil is not discharged during cleaning the upper section of the primary cooler, and is discharged to a mechanized ammonia water clarifying tank in a discharging mode in the step 2) after cleaning to ensure full replacement;
5) cleaning the lower section of the primary cooler by washing oil before overhauling:
closing a pipeline valve of a coal gas inlet and outlet of the primary cooler to be cleaned and blocking a blind plate, emptying a lower-section low-temperature water pipe bundle and introducing steam, closing a lower-section spray pipe valve of the primary cooler to be cleaned, filling washing oil in a tank car into a square groove by using a cleaning pump, spraying the washing oil to the lower section of the primary cooler by switching upper valves of a cleaning pump outlet header pipe and a hot ammonia water header pipe, directly entering the square groove through a lower-section condensate return header pipe to repeatedly and circularly spray the liquid after cleaning, not discharging the washing oil during cleaning the lower section of the primary cooler, discharging the washing oil to a mechanized ammonia water clarifying tank through the discharging mode of the step 3) after cleaning, and executing the step 3) to.
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| CN201810897034.3A CN108998103B (en) | 2018-08-08 | 2018-08-08 | Method and device for improving quality of condensate circulating of horizontal pipe primary cooler |
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| CN201810897034.3A CN108998103B (en) | 2018-08-08 | 2018-08-08 | Method and device for improving quality of condensate circulating of horizontal pipe primary cooler |
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| CN108998103B true CN108998103B (en) | 2020-10-27 |
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| CN109971514A (en) * | 2019-04-09 | 2019-07-05 | 鞍钢化学科技有限公司 | One kind being used for transverse tube type coal gas primary cooler outer circulation cleaning method and device |
| CN112985163B (en) * | 2021-02-03 | 2022-06-21 | 广东韶钢松山股份有限公司 | Cleaning method of primary cooler and purification system of primary cooler |
| CN114317039A (en) * | 2022-01-05 | 2022-04-12 | 新疆八一钢铁股份有限公司 | Condensate oil supplementing method for coking horizontal pipe primary cooler |
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| GB378222A (en) * | 1930-08-30 | 1932-08-11 | Still Carl | Obtaining by-products from coal distillation gases |
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| CN107723011A (en) * | 2017-11-13 | 2018-02-23 | 鞍钢股份有限公司 | A kind of method that online Water Cutting of negative pressure coal gas system pulls hole |
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2018
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| GB378222A (en) * | 1930-08-30 | 1932-08-11 | Still Carl | Obtaining by-products from coal distillation gases |
| US4188195A (en) * | 1977-09-16 | 1980-02-12 | Richard Jablin | Treatment of waste liquor |
| US4248604A (en) * | 1979-07-13 | 1981-02-03 | Texaco Inc. | Gasification process |
| CN201793537U (en) * | 2010-09-08 | 2011-04-13 | 鞍钢股份有限公司 | Device improving condensate quality of lower segment groove of transverse tube primary cooler |
| CN103254943A (en) * | 2013-05-21 | 2013-08-21 | 中冶焦耐工程技术有限公司 | Pre-cooling process and device of low-section replenishing liquor of transverse pipe pre-cooler |
| CN107723011A (en) * | 2017-11-13 | 2018-02-23 | 鞍钢股份有限公司 | A kind of method that online Water Cutting of negative pressure coal gas system pulls hole |
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|---|---|
| CN108998103A (en) | 2018-12-14 |
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