CN113462203B - Furnace drying method of carbon black reaction furnace - Google Patents
Furnace drying method of carbon black reaction furnace Download PDFInfo
- Publication number
- CN113462203B CN113462203B CN202110735345.1A CN202110735345A CN113462203B CN 113462203 B CN113462203 B CN 113462203B CN 202110735345 A CN202110735345 A CN 202110735345A CN 113462203 B CN113462203 B CN 113462203B
- Authority
- CN
- China
- Prior art keywords
- furnace
- temperature
- air
- baking
- carbon black
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09C—TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS, TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES ; PREPARATION OF CARBON BLACK ; PREPARATION OF INORGANIC MATERIALS WHICH ARE NO SINGLE CHEMICAL COMPOUNDS AND WHICH ARE MAINLY USED AS PIGMENTS OR FILLERS
- C09C1/00—Treatment of specific inorganic materials other than fibrous fillers; Preparation of carbon black
- C09C1/44—Carbon
- C09C1/48—Carbon black
- C09C1/50—Furnace black ; Preparation thereof
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention relates to a furnace drying method of a carbon black reaction furnace, belonging to the technical field of furnace carbon black production. The furnace baking method of the invention sets technological parameters such as the primary furnace baking temperature, the temperature rise speed, the furnace baking time, the furnace baking air-oil ratio and the like of the reaction furnace according to the sintering requirement of the reaction furnace, combines the production technological procedures, shortens the furnace baking time and optimizes the furnace baking construction technological steps. The method ensures that the reaction furnace is smoothly carried out in the starting and commissioning stage, thereby establishing the success of one-time production of the whole carbon black production line, and determining the reduction of hidden dangers and the improvement of equipment management level in the production process in a long period of running of the whole production line.
Description
Technical Field
The invention relates to the technical field of furnace-method carbon black production, in particular to a furnace drying method of a carbon black reaction furnace.
Background
The reaction furnace is the core equipment in the whole production process in the carbon black production, the yield and the quality of the carbon black have direct relation with the reaction furnace, the reaction furnace developed to the existing carbon black system is gradually formed, the process is mature and stable, and the reaction furnace is developed from an initial single-chamber furnace to an existing multi-section three-chamber furnace with a new process.
The baking oven of the reaction furnace generally comprises an electric heating baking oven and a coal gas or natural gas combustion baking oven, all the baking ovens are independent procedures and cannot be synchronous with production, the early preparation process when the baking oven is ready again after the baking oven is finished is required, the construction period is long, the baking oven effect cannot be ensured, a large amount of manpower must be sent for supervision and maintenance in the baking oven process, the resource waste is serious in the process, and the environmental protection is not facilitated.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provide an optimized furnace baking method of a carbon black reaction furnace.
The invention is realized by the following technical scheme:
a furnace drying method of a carbon black reaction furnace comprises the following steps:
1) before the oven is dried, all the systems are debugged correctly, various nozzles are tested and calibrated, the oven material is in place, and the manhole at the upper part of the air preheater is in an open position.
2) The temporary thermocouple for the oven and the on-site temperature display instrument are installed and debugged; the temporary thermocouple is inserted from the raw oil gun position hole, and the opening is sealed by asbestos rope or felt.
3) Opening a slag discharge hole on the raw oil preheater, and opening a water discharge hole on a base of the air preheater by the waste heat boiler; in the reactor shutdown interlocking, an alarm bypass switch is keyed in through the operation of a central control room; from the first quenching section, 4 primary quenching water guns are inserted in the twenty-fifth row of the quenching section for standby.
4) When the whole process is finished, the central control room is always manually controlled to ensure that the temperature of the middle section is less than or equal to 900 ℃ and the temperature of the end section is less than or equal to 280 ℃.
5) And confirming that the raw oil flows through a raw oil preheater, and controlling the circulation of the raw oil with the temperature of the raw oil being less than or equal to 280 ℃ by a hand of a central control room.
6) Starting a preheating loop, manually opening a loop regulating valve in a central control room, and drying a furnace by hot air of a main air supply fan; and inserting a gas gun into a sight hole of the furnace cover, drying the reaction furnace to 400-500 ℃ by adopting gas, and switching an automatic regulating valve to control the temperature of the furnace.
7) According to the temperature rise requirement of the reaction furnace, all relevant flanges and bolts of the reaction furnace are screwed again; when the furnace temperature reaches 400-500 ℃, covering a manhole at the upper part of the air preheater and sealing each vent;
a fuel oil feeding gun for igniting fuel oil by using liquefied gas; after the ignition, cutting off the liquefied gas, pulling out the liquefied gas gun and recovering the sight glass; gradually adjusting by hand according to the temperature rise requirement of the reaction furnace;
increasing the conveying amount of coal gas and air until the coal gas amount reaches 1125Nm 3 The air amount reaches 9650m 3 When the temperature reaches the operating temperature of the process, namely the furnace temperature reaches the theoretical combustion temperature of 1760 +/-10 ℃;
stopping baking the furnace after the temperature of the furnace rises to 1760 +/-10 ℃ and sintering, sealing a manhole at the upper part of the air preheater, leading a flue to be communicated with a main bag filter, preheating the main bag filter, opening a stop valve to discharge air, and closing a drain valve at the bottom of the raw oil preheater before oil injection production;
the temperature rise requirements of the reactor are shown in the following table:
8) and (4) checking the conditions of all flanges and bolts again, screwing down, checking the conditions in the furnace, paying attention to check the hot air outlet pipe of the air preheater, the cold air inlet pipe and the expansion joint on the flue gas, and finding out problems and timely processing the problems.
Further, in the step 7), the ratio of the gas quantity to the air quantity is not lower than 1: 7.
Further, in the step 7), the conveying amounts of the coal gas and the air are increased, and the specific table is as follows:
further, in the step 2), a temporary thermocouple monitors the furnace temperature before 1500 ℃, and when the temporary thermocouple is installed, the temporary thermocouple is retracted by 10mm so as to avoid burning out.
The invention has the following beneficial effects:
the invention relates to an optimized reaction furnace baking process, which strictly controls the relation between temperature and time change and hot tightening in the baking process, thereby having reference function on the installation sequence of the reaction furnace of the equipment in the early stage, the installation sequence of furnace sections and the pre-tightening requirement in the installation process, adjusting and optimizing the steps of the installation and construction process according to the hot tightening mechanism, saving a large amount of time for the subsequent baking and production work, simultaneously providing objective economic benefit and human-computer utilization rate, and greatly ensuring the construction progress. The method integrates the construction steps, adjusts the time curve and the temperature curve of each stage, combines the production process requirements, shortens the construction progress for each party, simplifies the process flow, saves the cost and consolidates the professional technology of constructors. The method ensures that the reaction furnace is smoothly carried out in the starting and commissioning stage, thereby establishing the success of one-time production of the whole carbon black production line, and determining the reduction of hidden dangers and the improvement of equipment management level in the production process in a long period of running of the whole production line.
Drawings
The accompanying drawings are included to provide a further description of the invention and are incorporated in and constitute a part of this application, with the exemplary embodiments and description of the invention being given to illustrate and not limit the invention.
FIG. 1 is a graph showing the primary baking temperature, temperature rise rate and baking time of a reactor in the method of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present invention, the following detailed description of the invention will be given for clearness and completeness. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The embodiment of the invention provides a furnace drying method of a carbon black reaction furnace, which comprises the following steps:
1) before the oven is dried, all systems are debugged correctly, including fuel, raw oil, air and quenching water systems, various nozzles are used for trial-spray calibration, the oven material is in place, and the manhole at the upper part of the air preheater is in an open position.
2) The temporary thermocouple for the oven and the on-site temperature display instrument are installed and debugged; the temporary thermocouple is inserted from the position hole of the raw oil gun, and the opening is sealed by asbestos ropes and felts; monitoring the furnace temperature before 1500 ℃ by using a temporary thermocouple, and retracting the temporary thermocouple by 10mm when the temporary thermocouple is installed so as to avoid burning out; when the furnace temperature reaches above 850 ℃, attention is paid to observing and controlling the temperature.
3) Opening a slag discharge hole on a raw oil preheater, and opening a water discharge hole on a base of an air preheater by a waste heat boiler; in the reactor shutdown interlocking, an alarm bypass switch is keyed in through the operation of a central control room; from the first quenching section, 4 primary quenching water guns are inserted in the twenty-fifth row of the quenching section for standby, and from the front of the furnace.
4) When the whole process is finished, the central control room is always manually controlled to ensure that the temperature of the middle section is less than or equal to 900 ℃ and the temperature of the tail section is less than or equal to 280 ℃, and the process is realized by adjusting the water amount of primary quenching and secondary quenching.
5) And confirming that the raw oil flows through a raw oil preheater, and controlling the circulation of the raw oil with the temperature of the raw oil being less than or equal to 280 ℃ by a hand of a central control room.
6) Starting a preheating loop, manually opening a loop regulating valve in a central control room, and drying a furnace by hot air of a main air supply fan; and inserting a gas gun into a sight hole of the furnace cover, drying the reaction furnace to 400-500 ℃ by adopting gas, and switching an automatic regulating valve to control the temperature of the furnace.
7) According to the temperature rise requirement of the reaction furnace, all relevant flanges and bolts of the reaction furnace are screwed again; when the furnace temperature reaches 400-500 ℃, covering a manhole at the upper part of the air preheater and sealing each vent;
a fuel oil feeding gun for igniting fuel oil by using liquefied gas; after the lighting, cutting off the liquefied gas, pulling out the liquefied gas gun and recovering the sight glass; gradually adjusting by hand according to the temperature rise requirement of the reaction furnace;
the conveying capacity of coal gas and air is gradually increased, and the ratio of the coal gas quantity to the air quantity is not less than 1:7, and the reaction furnace has the danger of burning down when the ratio is less than the ratio; when the gas amount reaches 1125Nm 3 The air amount reaches 9650m 3 When the temperature reaches the operating temperature of the process, namely the furnace temperature reaches the theoretical combustion temperature of 1760 +/-10 ℃;
stopping baking the furnace after the temperature of the furnace rises to 1760 +/-10 ℃ and sintering, sealing a manhole at the upper part of the air preheater, leading a flue to be communicated with a main bag filter, preheating the main bag filter, opening a stop valve through a central control chamber to be emptied, and closing a water drain valve at the bottom of the raw oil preheater before oil injection production;
the temperature rise requirements of the reactor are shown in the following table:
(ii) a The temperature rise parameters are optimized parameters obtained by combining the temperature requirements of the reaction furnace and the operation sequence of each process during production, the temperature rise speed and the constant temperature time reach the aims of ensuring the safety and feasibility of the furnace drying process, providing solid data and guarantee for the debugging and commissioning of the operation of each process in the production in advance and ensuring the sintering quality; when the furnace temperature rises to 1760 ℃, the production can be put into production after the heat preservation is carried out for 4 hours; if the production is not put into operation, the furnace is normally shut down and the temperature is naturally reduced;
correspondingly, the primary furnace drying temperature, the temperature rise speed and the furnace drying time curve chart of the reaction furnace are shown in figure 1;
the conveying capacity of the coal gas and the air is shown in the following table:
(ii) a The sintered reaction furnace is the furnace after primary sintering, and because of the overhauled or normally stopped reaction furnace, when the reaction furnace is restarted, a temporary thermocouple furnace is not needed to be adopted like a primary sintering furnace of a new reaction furnace, but the proportion and the duration time of the process air and the coal gas are directly controlled by using the regulating valve. The air-oil ratio, the heating speed and the baking time table of the baking furnace after the sintering of the reaction furnace in the data can be directly adjusted in a central control room, so that the workload is greatly reduced, the temperature can be ensured to be continuous, and the deviation is extremely small.
8) And (4) checking the conditions of all flanges and bolts again, screwing down, checking the conditions in the furnace, paying attention to check the hot air outlet pipe of the air preheater, the cold air inlet pipe and the expansion joint on the flue gas, and finding out problems and timely processing the problems.
After the steps are completed, the reaction furnace is considered to be sintered, the furnace baking work of the reaction furnace is completed, and other preparation work can be operated before the operation.
The method of the invention optimizes the installation period and the furnace drying time of the reaction furnace system, and synchronously carries out the operation with the production test run, thereby improving the construction progress and ensuring the smooth passing of each process control point of the reaction furnace system. Meanwhile, the connection of hot compacting in the furnace baking construction is established, the hot compacting construction steps are optimized, the progress is reduced, the personnel utilization rate is improved, and the effects that the reaction furnace is normally driven at a high temperature and is put into production successfully at one time are achieved.
The above embodiments are provided to further explain the problems and advantages of the present invention, and it should be understood that the above embodiments are only examples of the present invention and are not intended to limit the present invention, and all equivalent changes and modifications within the scope of the present invention are intended to be covered by the claims.
Claims (4)
1. A furnace drying method of a carbon black reaction furnace is characterized by comprising the following steps:
1) before the oven is dried, debugging each system correctly, calibrating various nozzles by trial spraying, putting the oven material in place, and putting the manhole at the upper part of the air preheater at an open position;
2) the temporary thermocouple for the oven and the on-site temperature display instrument are installed and debugged; the temporary thermocouple is inserted from the position hole of the raw oil gun, and the opening is sealed by asbestos ropes and felts;
3) opening a slag discharge hole on a raw oil preheater, and opening a water discharge hole on a base of an air preheater by a waste heat boiler; in the reactor shutdown interlocking, an alarm bypass switch is keyed in through the operation of a central control room; inserting 4 primary quenching water guns in the twenty-fifth row of the quenching section for standby from the first quenching section;
4) when the whole process is finished, the central control room is always manually controlled to ensure that the temperature of the middle section is less than or equal to 900 ℃ and the temperature of the end section is less than or equal to 280 ℃;
5) confirming that the raw oil flows through a raw oil preheater, and controlling the circulation of the raw oil with the temperature of the raw oil being less than or equal to 280 ℃ by a hand of a central control room;
6) starting a preheating loop, manually opening a loop regulating valve in a central control room, and drying a furnace by hot air of a main air supply fan; inserting a gas gun into a sight hole of a furnace cover, drying the reaction furnace to 400-500 ℃ by adopting gas, and switching an automatic regulating valve to control the temperature of the furnace;
7) according to the temperature rise requirement of the reaction furnace, all relevant flanges and bolts of the reaction furnace are screwed again; when the furnace temperature reaches 400-500 ℃, covering a manhole at the upper part of the air preheater and sealing each vent;
a fuel oil feeding gun for igniting fuel oil by using liquefied gas; after the lighting, cutting off the liquefied gas, pulling out the liquefied gas gun and recovering the sight glass; gradually adjusting by hand according to the temperature rise requirement of the reaction furnace;
increasing the conveying amount of coal gas and air until the coal gas amount reaches 1125Nm 3 The air quantity reaches 9650m 3 When the temperature reaches the operating temperature of the process, namely the furnace temperature reaches the theoretical combustion temperature of 1760 +/-10 ℃;
stopping baking the furnace after the temperature of the furnace rises to 1760 +/-10 ℃ and sintering, sealing a manhole at the upper part of the air preheater, leading a flue to be communicated with a main bag filter, preheating the main bag filter, opening a stop valve to discharge air, and closing a drain valve at the bottom of the raw oil preheater before oil injection production;
the temperature rise requirements of the reactor are shown in the following table:
8) and (4) checking the conditions of all flanges and bolts again, screwing down, checking the conditions in the furnace, paying attention to check the hot air outlet pipe of the air preheater, the cold air inlet pipe and the expansion joint on the flue gas, and finding out problems and timely processing the problems.
2. The method of claim 1, wherein the step of baking the carbon black reactor comprises: in the step 7), the ratio of the gas quantity to the air quantity is not less than 1: 7.
3. The method of claim 2, wherein the step of baking the carbon black reactor comprises: in the step 7), the conveying amount of coal gas and air is increased, and the specific table is as follows:
4. the method for baking a carbon black reactor according to any one of claims 1 to 3, wherein: in the step 2), the furnace temperature before 1500 ℃ is monitored by the temporary thermocouple, and the temporary thermocouple is retracted by 10mm when being installed so as to avoid burning out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735345.1A CN113462203B (en) | 2021-06-30 | 2021-06-30 | Furnace drying method of carbon black reaction furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110735345.1A CN113462203B (en) | 2021-06-30 | 2021-06-30 | Furnace drying method of carbon black reaction furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113462203A CN113462203A (en) | 2021-10-01 |
| CN113462203B true CN113462203B (en) | 2022-08-05 |
Family
ID=77874393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110735345.1A Active CN113462203B (en) | 2021-06-30 | 2021-06-30 | Furnace drying method of carbon black reaction furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113462203B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115109886B (en) * | 2022-07-11 | 2023-10-20 | 广东韶钢松山股份有限公司 | Heat preservation method for long-time shutdown of converter |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038483A (en) * | 1988-06-11 | 1990-01-03 | 罗进南 | Lane-cliped type dwelling house and application thereof side by side |
| CN201507925U (en) * | 2009-08-13 | 2010-06-16 | 山东华东橡胶材料有限公司 | Liquid gas gun for carbon black reaction furnace oven |
| CN101915428A (en) * | 2010-08-23 | 2010-12-15 | 张云斌 | Energy-saving device and method for producing hard carbon black |
| CN103463949A (en) * | 2013-08-08 | 2013-12-25 | 江苏新世纪江南环保股份有限公司 | Method and equipment for treating oil stain and flue dust through flue gas desulfurization system |
| CN203582779U (en) * | 2014-02-13 | 2014-05-07 | 山东联科新材料有限公司 | Excessive tail gas oven device for tail gas furnace in carbon black line production |
| CN106110863A (en) * | 2016-08-08 | 2016-11-16 | 中昊黑元化工研究设计院有限公司 | A kind of boiler with tailed method of denitration |
| CN206457449U (en) * | 2017-01-23 | 2017-09-01 | 喀什德力克石油工程技术有限公司 | A kind of carbon black production system |
| CN206692591U (en) * | 2017-03-06 | 2017-12-01 | 唐山黑猫炭黑有限责任公司 | A kind of U-shaped black reactor device of production of carbon black |
| CN208292909U (en) * | 2018-04-25 | 2018-12-28 | 茂名环星新材料股份有限公司 | Furnace drying device under Novel wire |
| CN209166102U (en) * | 2018-11-30 | 2019-07-26 | 云南云维飞虎化工有限公司 | A kind of outer furnace drying device of carbon black production line |
| CN210291949U (en) * | 2019-07-05 | 2020-04-10 | 朝阳黑猫伍兴岐炭黑有限责任公司 | Fuel gas supply device for drying furnace of carbon black reaction furnace |
| CN210751734U (en) * | 2019-08-12 | 2020-06-16 | 青州市博奥炭黑有限责任公司 | Carbon black baker filter equipment |
-
2021
- 2021-06-30 CN CN202110735345.1A patent/CN113462203B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1038483A (en) * | 1988-06-11 | 1990-01-03 | 罗进南 | Lane-cliped type dwelling house and application thereof side by side |
| CN201507925U (en) * | 2009-08-13 | 2010-06-16 | 山东华东橡胶材料有限公司 | Liquid gas gun for carbon black reaction furnace oven |
| CN101915428A (en) * | 2010-08-23 | 2010-12-15 | 张云斌 | Energy-saving device and method for producing hard carbon black |
| CN103463949A (en) * | 2013-08-08 | 2013-12-25 | 江苏新世纪江南环保股份有限公司 | Method and equipment for treating oil stain and flue dust through flue gas desulfurization system |
| CN203582779U (en) * | 2014-02-13 | 2014-05-07 | 山东联科新材料有限公司 | Excessive tail gas oven device for tail gas furnace in carbon black line production |
| CN106110863A (en) * | 2016-08-08 | 2016-11-16 | 中昊黑元化工研究设计院有限公司 | A kind of boiler with tailed method of denitration |
| CN206457449U (en) * | 2017-01-23 | 2017-09-01 | 喀什德力克石油工程技术有限公司 | A kind of carbon black production system |
| CN206692591U (en) * | 2017-03-06 | 2017-12-01 | 唐山黑猫炭黑有限责任公司 | A kind of U-shaped black reactor device of production of carbon black |
| CN208292909U (en) * | 2018-04-25 | 2018-12-28 | 茂名环星新材料股份有限公司 | Furnace drying device under Novel wire |
| CN209166102U (en) * | 2018-11-30 | 2019-07-26 | 云南云维飞虎化工有限公司 | A kind of outer furnace drying device of carbon black production line |
| CN210291949U (en) * | 2019-07-05 | 2020-04-10 | 朝阳黑猫伍兴岐炭黑有限责任公司 | Fuel gas supply device for drying furnace of carbon black reaction furnace |
| CN210751734U (en) * | 2019-08-12 | 2020-06-16 | 青州市博奥炭黑有限责任公司 | Carbon black baker filter equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113462203A (en) | 2021-10-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101576314B (en) | Ignition control system of tube furnace | |
| CN106247353B (en) | A kind of blast furnace gas diffusing ignition system | |
| CN113462203B (en) | Furnace drying method of carbon black reaction furnace | |
| CN201827874U (en) | Control system of fuel oil/gas steam boiler | |
| CN104456557A (en) | Gas burner system for household garbage incinerator | |
| CN102679356A (en) | Automatic control mode and device of premixing type secondary burner | |
| CN205619781U (en) | Modified heating furnace radiation pipeline section burning control system | |
| RU2761604C1 (en) | Positive pressure coke oven heating system and method for temperature control | |
| CN203731707U (en) | Control system for fuel oil gas conduction oil boiler | |
| CN204986952U (en) | Ultra -supercritical generating unit does not have full cold state start -up system in supplementary vapour source | |
| CN204476360U (en) | A kind of individual well sledge dress heated by natural gas throttling arrangement | |
| CN209636161U (en) | One drag two positive pressure furnace drying device | |
| CN108224772A (en) | A kind of dual-purpose boiling type hot-blast stove of novel bottle coal and control method | |
| CN105889907B (en) | A kind of ignition device of circulating fluidized bed boiler and its ignition control method | |
| CN204268475U (en) | Domestic waste incineration gas burner system | |
| CN110762553B (en) | Method for preventing coke falling and fire extinguishing of boiler | |
| CN209147111U (en) | A kind of metallurgical gases ignition bleeding device | |
| CN204880069U (en) | Vapour system is assisted in full cold start of large -scale thermal power unit | |
| CN109439345B (en) | One-driving-two positive pressure baking oven device | |
| CN201828031U (en) | Control system of fuel oil/gas hot water boiler | |
| CN202177109U (en) | Gas burner | |
| CN207035215U (en) | A kind of igniter under high inert atmosphere with pressure | |
| CN203704373U (en) | Oil or gas fired vacuum hot water boiler control system | |
| CN111765458A (en) | Natural gas spray gun combustion control system of melting furnace of float ash glass production line | |
| CN218435819U (en) | Rapid cooling device for temporary hot blast valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |