CN111237805A - Ignition operation method for hot air thawing warehouse - Google Patents
Ignition operation method for hot air thawing warehouse Download PDFInfo
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- CN111237805A CN111237805A CN202010021966.9A CN202010021966A CN111237805A CN 111237805 A CN111237805 A CN 111237805A CN 202010021966 A CN202010021966 A CN 202010021966A CN 111237805 A CN111237805 A CN 111237805A
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- ignition
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q13/00—Igniters not otherwise provided for
- F23Q13/02—Igniters not otherwise provided for using gas burners, e.g. gas pokers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23Q—IGNITION; EXTINGUISHING-DEVICES
- F23Q25/00—Extinguishing-devices, e.g. for blowing-out or snuffing candle flames
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a method for igniting a hot air unfreezing warehouse, which ensures that the hot air unfreezing warehouse can normally and stably run by formulating a series of pre-ignition preparation and ignition operation methods, achieves the unfreezing effect, timely dumps coal and ensures stable coal supply. Meanwhile, the safety of the unfreezing warehouse in the ignition process is ensured, potential safety hazards of gas and facilities are eliminated, safety accidents are avoided, and the personal safety of workers and enterprise property are guaranteed.
Description
Technical Field
The invention relates to the technical field of coal chemical industry, in particular to an ignition operation method for a hot air unfreezing warehouse.
Background
The thawing warehouse is a facility for heating and thawing clean coal frozen in a vehicle and arriving at a coke plant. In cold seasons, the temperature is reduced, clean coal is easy to freeze in the transportation process, unloading is very difficult, and the turnover of vehicles and the supply of coal for production are affected. Therefore, it is necessary to provide a thawing warehouse, and a vehicle loaded with the frozen clean coal is first transported to the thawing warehouse to be thawed and then unloaded.
The thawing warehouse commonly used in the coking plant is a steam thawing warehouse and a hot air thawing warehouse. The steam thawing warehouse has long thawing time, serious corrosion to equipment, large maintenance amount and laggard process. The hot air thawing warehouse is the most common thawing warehouse and consists of a combustion furnace, a mixing chamber, a blower chamber, a thawing warehouse and the like. The combustion furnace can use coke oven gas, low heating value gas (blast furnace gas or generator gas) or the mixed gas of the coke oven gas and the low heating value gas as fuel gas to burn in the combustion furnace, the generated hot waste gas (600 plus 800 ℃) is mixed with part of cold air and the waste gas circulated from the warehouse, the temperature is reduced to 180 plus 210 ℃, the hot waste gas is sent into a closed unfreezing warehouse by a blower, and the coal parked in the warehouse is unfrozen in a forced convection heat transfer mode.
The hot air thawing warehouse can normally run, the key is whether the preparation work before ignition and the ignition are successful, and the ignition operation significance is great. Therefore, a scientific and reasonable ignition operation method needs to be formulated, so that the normal operation of the hot air thawing warehouse is ensured, the ignition safety is ensured, the gas leakage poisoning event and the explosion accident are avoided, and the personal safety of enterprise property and staff is ensured.
Disclosure of Invention
In view of one or more of the problems in the prior art, the present invention provides a method for operating a hot air thawing warehouse by ignition, comprising the steps of:
1) preparation before ignition
1.1, Pre-ignition inspection
Before the hot air thawing warehouse is started, a pressure test is carried out on a newly replaced pipeline, and whether a main gas pipeline and a branch pipeline are blocked or not is checked; then checking whether each valve and a shutter of the pipeline are normal; checking whether a fan and a motor of the thawing warehouse are normal; checking whether the display of each instrument is normal; for the wall body of the combustion chamber, whether the strength and the tightness can meet the ignition requirement is checked; checking whether the turning plate of the combustion chamber, the warehouse door and the hot air pipeline in the warehouse are normal or not;
1.2 safety equipment preparation
Preparing fire extinguishing equipment; the sensitivity of the low-voltage alarm is checked, and the failure is found to be repaired or replaced in time; the unfreezing warehouse is provided with a gas monitoring alarm; the thawing warehouse is provided with a positive pressure air respirator; preparing a dry powder fire extinguisher or sandy soil at a relevant position;
2) ignition operation
2.1, closing all facilities on the pipeline along the way, wherein the facilities comprise all steam, sampling, diffusing (not including tail end diffusing), water seal shutters and instruments on the pipeline along the way; informing relevant departments of the blind plate drawing operation conditions, and closing a bleeding valve after confirming that the gas is qualified for bleeding; and a coal gas explosion test is carried out, if the coal gas is stably combusted after the explosion device is ignited, the purity of the coal gas is considered to reach the standard, and formal ignition can be carried out;
2.2, confirming formal ignition, turning on the fan to purge the combustion chamber, then turning off the fan, and sending an ignition signal when the rotating speed of the fan is reduced; the ignited four-tube head extends into the combustion chamber from the ignition hole of the combustion chamber to be aligned with the burner for ignition; adjusting the opening degree of a fire nozzle valve, and performing oven drying operation according to a schedule; and accurately recording related data in the temperature rise process, and filling an operation record.
The specific operation method in the step 1.1 is as follows:
carry out the pressure test to the pipeline of newly changing before the storehouse is started to hot-blast unfreeze, whether inspection coal gas main pipe and branch pipeline block up: the checking sequence is as follows: checking the appearance of the pipeline; inspecting the wall thickness of a key area; carrying out a selective hammering test on the pipeline; inspecting the appearance of the flange and the welding line; checking the water seal to ensure that the water seal is full;
checking whether each valve and shutter of the pipeline are normal: the checking sequence is as follows: lubricating and oiling the shutter and the valve, and performing an opening and closing test; selectively replacing the sealing gaskets of the valve and the shutter according to the use condition; replacing the damaged shaft head disk root of the gland valve of the shutter;
checking whether a fan and a motor of the unfreezing warehouse are normal: the checking sequence is as follows: checking whether the motor is normal; then checking whether the fan blade is normal; then checking whether the fan bearing water cooling system is normal;
checking the strength and tightness of the walls of the combustion chamber: the checking sequence is as follows: observing whether the wall body is inclined; whether there is a crack; whether there is a dishing condition.
Starting a fan in the step 2.2 to sweep the combustion chamber for 2-4 minutes, and then checking the content of gas in the combustion furnace, wherein the pressure of the gas is not less than 1000pa, and preferably more than 1.5 kpa; regulating the amount of coal gas and air, and raising the temperature of the furnace body to over 650 ℃ by 50-100 ℃ every day.
Further included in the above ignition operation are: the maximum temperature rise allowed by the motor is not more than 65 ℃, and the maximum temperature is not more than 70 ℃; the maximum temperature rise allowed by the bearing is not more than 45 ℃, and the maximum temperature is not more than 70 ℃; the temperature of the combustion chamber of the unfreezing chamber is not lower than 900 ℃.
According to the ignition operation method for the hot air thawing warehouse, a series of ignition operation methods are formulated, so that the hot air thawing warehouse can normally and stably operate, the thawing effect is achieved, the coal is dumped in time, and the stable coal supply is guaranteed. Meanwhile, the safety of the unfreezing warehouse in the ignition process is ensured, potential safety hazards of gas and facilities are eliminated, safety accidents are avoided, and the personal safety of workers and enterprise property are guaranteed.
Detailed Description
In order to ensure the normal operation of the hot air thawing warehouse, ensure the ignition safety, avoid the occurrence of gas leakage poisoning events and explosion accidents and ensure the personal safety of enterprise property and workers, the invention provides the ignition operation method of the hot air thawing warehouse.
The present invention will be described in detail with reference to specific examples.
The ignition operation method of the hot air thawing warehouse provided by the invention specifically comprises the following steps:
1. preparatory operation before ignition
1.1, carrying out a pressure test on a newly replaced pipeline before starting the thawing warehouse, and simultaneously checking a main gas pipeline and a branch pipeline; checking the sequence in sequence: checking the appearance of the pipeline; inspecting the wall thickness of a key area; carrying out a selective hammering test on the pipeline; inspecting the appearance of the flange and the welding line; the water seal is checked to ensure that the water seal is full.
1.2 checking whether each valve and shutter is normal; the checking sequence is as follows: lubricating and oiling the shutter and the valve, and performing an opening and closing test; selectively replacing the sealing gaskets of the valve and the shutter according to the use condition; and replacing the damaged shaft head disk root of the gland valve of the shutter.
1.3, checking whether the fan and each instrument are normal; the inspection is as follows in sequence: checking whether the motor is normal; then checking whether the fan blade is normal; and then checking whether the water cooling system of the fan bearing is normal. If the problem exists, the maintenance or the replacement is carried out in time.
1.4, checking the strength and tightness of the wall of the combustion chamber; the checking sequence is as follows: observing whether the wall body is inclined; whether there is a crack; whether there is a recess, etc. If the problems exist, timely mending is needed; the bracing piece is used for timely reinforcement which needs reinforcement, and adjusting components such as a combustion furnace top bracing piece large screw cap and the like are refueled and permeated three days in advance.
1.5 checking whether the turnover plate of the combustion chamber, the warehouse door and the hot air pipeline in the warehouse are good or not; if the problem is found, the maintenance or the replacement is carried out in time.
2. Safety equipment preparation
2.1 because the working site belongs to a gas area, fire extinguishing equipment must be prepared, when the gas equipment or other equipment needs to be fired, a fire certificate must be dealt with in advance, and a dry powder fire extinguisher or sandy soil is prepared at a relevant position.
2.2 Low pressure alarms are sensitive and can be repaired or replaced in time when failure is detected.
2.3 to prevent gas escape accidents, the defrosting warehouse should be equipped with "gas monitoring alarms" (such as "gas monitoring alarms" disclosed in CN203929755U, CN2122409U, etc.). The defrosting warehouse is generally provided with two sets of positive pressure air respirators (such as those disclosed in CN104324461A and the like) for use when gas leaks.
3. Ignition operation
3.1 the ignition department confirms that the ignition preparation work is ready, and applies for the upper-level department for preparing ignition.
3.2 closing all steam, sampling, diffusing (excluding tail end diffusing) and water seal shutters on pipelines along the way, and closing the instrument; informing relevant departments of the blind plate drawing operation conditions, and closing a bleeding valve after confirming that the gas is qualified for bleeding; the operator of the ignition department performs an explosion test, connects the rubber hose with a quartering pipe to the small valve of the gas branch pipe, opens the small valve, and takes full gas with the ignition exploder to perform the explosion test to check the purity of the gas. If the gas is stably combusted after the explosion device is ignited, the purity of the gas is considered to reach the standard, and formal ignition can be carried out.
3.3 starting the fan to purge the combustion chamber for about 3 minutes, then checking the content of the coal gas in the combustion furnace, and checking whether the pressure of the coal gas is more than 1.5 kpa. The ignited four-tube head extends into the combustion chamber from the combustion chamber ignition hole and is aligned with the fire nozzle for ignition. Regulating the amount of coal gas and air, and raising the temperature of the furnace body to over 650 ℃ by 50-100 ℃ every day. And accurately recording related data in the temperature rise process, and filling an operation record.
3.4 notes on related items: the maximum temperature rise allowed by the motor is not more than 65 ℃, and the maximum temperature is not more than 70 ℃; the maximum temperature rise allowed by the bearing is not more than 45 ℃, and the maximum temperature is not more than 70 ℃; the gas pressure is not less than 1000pa, and the temperature of the combustion chamber of the thawing warehouse is not lower than 900 ℃. The thawing warehouse is not accurate to enter at will, and two persons can enter in front of each other when the thawing warehouse needs to enter in work.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An ignition operation method of a hot air thawing warehouse is characterized by comprising the following steps:
1) preparation before ignition
1.1, Pre-ignition inspection
Before the hot air thawing warehouse is started, a pressure test is carried out on a newly replaced pipeline, and whether a main gas pipeline and a branch pipeline are blocked or not is checked; then checking whether each valve and a shutter of the pipeline are normal; checking whether a fan and a motor of the thawing warehouse are normal; checking whether the display of each instrument is normal; for the wall body of the combustion chamber, whether the strength and the tightness can meet the ignition requirement is checked; checking whether the turning plate of the combustion chamber, the warehouse door and the hot air pipeline in the warehouse are normal or not;
1.2 safety equipment preparation
Preparing fire extinguishing equipment; the sensitivity of the low-voltage alarm is checked, and the failure is found to be repaired or replaced in time; the unfreezing warehouse is provided with a gas monitoring alarm; the thawing warehouse is provided with a positive pressure air respirator; preparing a dry powder fire extinguisher or sandy soil at a relevant position;
2) ignition operation
2.1, closing all facilities on the pipeline along the way, wherein the facilities comprise all steam, sampling, diffusing (not including tail end diffusing), water seal shutters and instruments on the pipeline along the way; informing relevant departments of the blind plate drawing operation conditions, and closing a bleeding valve after confirming that the gas is qualified for bleeding; and a coal gas explosion test is carried out, if the coal gas is stably combusted after the explosion device is ignited, the purity of the coal gas is considered to reach the standard, and formal ignition can be carried out;
2.2, confirming formal ignition, turning on the fan to purge the combustion chamber, then turning off the fan, and sending an ignition signal when the rotating speed of the fan is reduced; the ignited four-tube head extends into the combustion chamber from the ignition hole of the combustion chamber to be aligned with the burner for ignition; adjusting the opening degree of a fire nozzle valve, and performing oven drying operation according to a schedule; and accurately recording related data in the temperature rise process, and filling an operation record.
2. The method according to claim 1, characterized in that the specific operating method in step 1.1 is:
carry out the pressure test to the pipeline of newly changing before the storehouse is started to hot-blast unfreeze, whether inspection coal gas main pipe and branch pipeline block up: the checking sequence is as follows: checking the appearance of the pipeline; inspecting the wall thickness of a key area; carrying out a selective hammering test on the pipeline; inspecting the appearance of the flange and the welding line; checking the water seal to ensure that the water seal is full;
checking whether each valve and shutter of the pipeline are normal: the checking sequence is as follows: lubricating and oiling the shutter and the valve, and performing an opening and closing test; selectively replacing the sealing gaskets of the valve and the shutter according to the use condition; replacing the damaged shaft head disk root of the gland valve of the shutter;
checking whether a fan and a motor of the unfreezing warehouse are normal: the checking sequence is as follows: checking whether the motor is normal; then checking whether the fan blade is normal; then checking whether the fan bearing water cooling system is normal;
checking the strength and tightness of the walls of the combustion chamber: the checking sequence is as follows: observing whether the wall body is inclined; whether there is a crack; whether there is a dishing condition.
3. Method according to claim 1 or 2, characterized in that in step 2.2, the blower is turned on to perform the chamber purging for 2-4 minutes, and then the gas content in the furnace is checked, the gas pressure is not less than 1000pa, preferably more than 1.5 kpa; regulating the amount of coal gas and air, and raising the temperature of the furnace body to over 650 ℃ by 50-100 ℃ every day.
4. The method according to any one of claims 1-3, further comprising, in an ignition operation: the maximum temperature rise allowed by the motor is not more than 65 ℃, and the maximum temperature is not more than 70 ℃; the maximum temperature rise allowed by the bearing is not more than 45 ℃, and the maximum temperature is not more than 70 ℃; the temperature of the combustion chamber of the unfreezing chamber is not lower than 900 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010021966.9A CN111237805A (en) | 2020-01-09 | 2020-01-09 | Ignition operation method for hot air thawing warehouse |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010021966.9A CN111237805A (en) | 2020-01-09 | 2020-01-09 | Ignition operation method for hot air thawing warehouse |
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| CN111237805A true CN111237805A (en) | 2020-06-05 |
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| CN202010021966.9A Pending CN111237805A (en) | 2020-01-09 | 2020-01-09 | Ignition operation method for hot air thawing warehouse |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789734A (en) * | 2012-05-29 | 2012-11-21 | 山西太钢不锈钢股份有限公司 | Sintering ignition furnace simulate operation method |
| CN103499093A (en) * | 2013-09-26 | 2014-01-08 | 吉木萨尔县光源发电有限责任公司 | Starting ignition method of circulating fluidized bed boiler |
-
2020
- 2020-01-09 CN CN202010021966.9A patent/CN111237805A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102789734A (en) * | 2012-05-29 | 2012-11-21 | 山西太钢不锈钢股份有限公司 | Sintering ignition furnace simulate operation method |
| CN103499093A (en) * | 2013-09-26 | 2014-01-08 | 吉木萨尔县光源发电有限责任公司 | Starting ignition method of circulating fluidized bed boiler |
Non-Patent Citations (3)
| Title |
|---|
| 丁超: "《加热炉工》", 31 December 1959 * |
| 孔维军: "《原料准备与加热》", 31 December 2012 * |
| 贾继华: "《冶金企业安全生产与环境保护》", 31 December 2014 * |
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Application publication date: 20200605 |