CN112044014A - Method for adjusting medicament injection time of gas generator of non-pressure-storage fire extinguishing device - Google Patents
Method for adjusting medicament injection time of gas generator of non-pressure-storage fire extinguishing device Download PDFInfo
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- CN112044014A CN112044014A CN202010920643.3A CN202010920643A CN112044014A CN 112044014 A CN112044014 A CN 112044014A CN 202010920643 A CN202010920643 A CN 202010920643A CN 112044014 A CN112044014 A CN 112044014A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D1/00—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires
- A62D1/06—Fire-extinguishing compositions; Use of chemical substances in extinguishing fires containing gas-producing, chemically-reactive components
Abstract
The invention belongs to the technical field of gas generating agents, and relates to a method for adjusting the medicament injection time of a gas generator of a non-pressure-storage fire extinguishing device, which is characterized in that a cooling material is added into a gas generating agent to reduce the reaction temperature of the medicament; the gas-producing medicament is pressed into large medicament columns, so that the specific surface area of the gas-producing medicament is reduced, and the gas-producing medicament columns are uniformly combusted layer by layer. The invention solves the problem that the spraying time of the non-pressure-storage dry powder fire extinguishing device is less than or equal to 1s in the practical application process, and provides a method for adjusting the spraying time according to requirements, so that the non-pressure-storage dry powder fire extinguishing device can be more widely applied to non-pressure-storage dry powder fire extinguishing devices in various places, and can also be used for reference in the design of gas producing agents of other gas generators.
Description
Technical Field
The invention belongs to the technical field of gas generating agents, relates to a gas generating agent of a gas generator of a non-pressure-storage dry powder pressure fire extinguishing device, and particularly relates to a method for adjusting the medicament injection time of the gas generator of the non-pressure-storage fire extinguishing device.
Background
The fire extinguishing agent used by the dry powder automatic fire extinguishing device belongs to the dry powder class, is nontoxic and pollution-free and is easy to clean.
The traditional portable fire extinguisher used at present needs personnel to put out a fire on the fire scene, and has large hysteresis. The automatic dry powder fire extinguisher can be linked with an advanced automatic fire alarm system or automatically started in a fire scene in an induction manner to control the fire condition at the initial stage, and the fire extinguishing performance is reliable.
The automatic dry powder fire extinguisher includes pressure storing and non-pressure storing.
The pressure-storing type automatic dry powder fire extinguisher is used to spray out dry powder with stored nitrogen under pressure. Has the advantages of long spraying time (more than or equal to 5S), and can be used for full-submerged fire extinguishing and local fire extinguishing. The fire extinguishing agent has the disadvantages that the hidden danger of pressure leakage exists, and the fire extinguishing agent cannot be sprayed out when fire extinguishment is caused by insufficient pressure. The pressure inspection is required to be carried out regularly (every 6 months), the pressure is removed and pressurized again when the pressure is insufficient, the subsequent maintenance wastes time and labor, and the pressure-detecting device is not suitable for the fire-fighting and fire-extinguishing part which is inconvenient to remove and is not easy to reach by personnel.
The non-pressure storage type automatic dry powder fire extinguishing device sprays dry powder into a protection area in a directional manner by gas with certain pressure generated under the action of a gas generating agent, the spraying time is less than 1 second, and the fire extinguishing effect of total flooding and local fire extinguishing is good. The advantages are normal pressure, no hidden trouble of pressure leakage, and no maintenance for fire extinguisher. The fire-fighting protection device can be widely used for underground pipe galleries, large warehouses, narrow spaces and fire-fighting parts which are not easy to reach by personnel, and can be installed for more than 10 years at one time. The disadvantages are that the spraying time is too short (less than 1 second), and the local fire extinguishing effect of some parts and the fire extinguishing effect of the special fire extinguishing device are not good enough.
The reason is that some local and special fire extinguishing devices require additional ducts and nozzles at the nozzle to better spray the dry powder to the designated location.
The gas producing agent in the non-pressure storage type dry powder automatic fire extinguishing device has fast reaction speed and short spraying time. After the conduit and the nozzle are additionally arranged, a large amount of generated gas can not be discharged quickly, the internal pressure of the fire extinguishing device is increased, the gas generating agent is influenced by high temperature and high pressure, the gas generating rate is too high, a large amount of high-pressure gas is sprayed instantly, dry powder is not taken out and still stays in the device, and the fire extinguishing effect can not be achieved. Another situation is that the dry powder blocks the nozzle or the bent part of the conduit, and a large amount of gas cannot be discharged to cause explosion danger.
If the non-pressure-storage dry powder extinguishing device can have proper spraying time (1 s-10 s), the extinguishing agent can be uniformly sprayed and atomized into a protection area and can also spread to any position by bypassing the gap of an obstacle, the fire is continuously extinguished under a certain designed extinguishing concentration, and a protected object is continuously immersed in the designed concentration within seconds, so that a good extinguishing effect is achieved.
The technical scheme is that the cooling material is added into the gas generating agent of the gas generator to reduce the reaction rate of the gas generating agent, and the adding amount of the cooling material is adjusted within a certain range, so that the spraying time of the fire extinguishing device can be adjusted, thereby adapting to different application environment requirements, achieving good fire extinguishing effect and expanding the application range of the non-pressure-storage dry powder fire extinguishing device.
Disclosure of Invention
The invention aims to solve the problem that the spraying time of a non-pressure-storage type dry powder fire extinguishing device is less than or equal to 1s in the practical application process, and provides a gas generator agent for the non-pressure-storage type fire extinguishing device, which aims to adjust the spraying time so that the fire extinguishing device can be designed with different spraying times according to the application environment to achieve the optimal fire extinguishing effect. The non-pressure-storage fire extinguishing device can be widely applied to fire extinguishing in various places and can also be used as reference for designing other gas generator medicaments.
The main technical scheme of the invention is as follows: a method for adjusting the agent spraying time of a gas generator of a non-pressure-storage fire extinguishing device is characterized in that a cooling material is added into a gas generating agent to reduce the reaction temperature of the agent; the gas-producing medicament is pressed into large medicament columns, so that the specific surface area of the gas-producing medicament is reduced, and the gas-producing medicament columns are uniformly combusted layer by layer.
Preferably, the temperature reducing material is ammonium oxalate or dicyanodiamine.
Further preferably, the cooling material is added in the raw material mixing process in the production of the gas production medicament and is uniformly mixed together, and the rest production processes are unchanged.
Further preferably, the adding amount of the ammonium oxalate is 1.0-20.0% of the mass of the gas generating agent of the gas generator, and the adding amount is determined according to different gas generating agents and different injection time.
Further preferably, the adding amount of the dicyandiamide is 1.0-10.0% of the mass of the gas generating agent of the gas generator, and the adding amount is determined according to different gas generating agents and different injection time.
Further preferably, the gas generating agent particles containing the cooling material are pressed into larger grains, and according to the product structure: pressing the totally-submerged product into a phi 45.00mm +/-0.5 mm and h70.00mm drug column; the fire extinguishing product in the engine compartment is pressed into powder columns with the diameter of 110.00mm plus or minus 0.5mm and the diameter of h15.00mm.
Further preferably, the pressing is performed by an oil press.
Further preferably, the pressing pressure is 10MPa to 20 MPa.
Through the technical scheme, the problem that the spraying time of the non-pressure-storage dry powder extinguishing device is less than or equal to 1s in the actual application process is solved, so that the aim that the non-pressure-storage dry powder extinguishing device can adjust the spraying time of a generator according to the application place to obtain better extinguishing effect is fulfilled.
The cooling material is added and uniformly distributed in the gas generating agent of the gas generator, and in the reaction process of the gas generating agent, the cooling material continuously desorbs and absorbs heat, so that the reaction temperature is reduced, the reaction speed of the gas generating agent is inhibited, and the gas generating time of the gas generator is prolonged.
The gas generating agent particles are pressed into larger grains, so that the combustion area is reduced, the grains uniformly combust layer by layer, the gas generating rate is stable, and the gas generating time is prolonged.
The gas generator after the technical scheme is implemented is assembled to a non-pressure storage type dry powder extinguishing device, and the dry powder spraying time can reach 3s-10 s. Can be applied to 3kg, 4kg, 5kg, 6kg, 8kg and 10kg non-pressure storage type dry powder extinguishing devices and special extinguishing devices for engine cabins.
The invention solves the problem that the spraying time of the non-pressure-storage dry powder fire extinguishing device is less than or equal to 1s in the practical application process, and provides a method for adjusting the spraying time according to requirements, so that the non-pressure-storage dry powder fire extinguishing device can be more widely applied to non-pressure-storage dry powder fire extinguishing devices in various places, and can also be used for reference in the design of gas producing agents of other gas generators.
Drawings
FIG. 1 is a schematic process flow diagram of a method according to an embodiment of the present invention.
Detailed Description
The process of the invention is described in detail below with reference to examples and figures.
Examples
In this embodiment, a non-pressure-storage dry powder extinguishing device is assembled by adding a cooling material into a certain gas generating agent.
The method for adding the cooling material is shown in the attached figure 1, and the specific process is as follows.
1. Comparative example 1# 1: weighing 200g of a certain gas production agent component material, uniformly mixing, and preparing the gas production agent according to a normal gas production agent production process.
2. Example 2# example: weighing 10g of dicyanodiamide, weighing 200g of a certain gas generating agent component material, and uniformly mixing to obtain the gas generating agent containing dicyanodiamide according to a normal gas generating agent production process.
3. Example 3# example: 30g of ammonium oxalate and 200g of a certain gas generating agent component material are weighed and evenly mixed to prepare the gas generating agent containing the ammonium oxalate according to the normal gas generating agent production process.
4. Pressing a explosive column: adjusting the pressure of an oil press to 10-20 MPa, weighing 100g of 1#, 2#, and 3# gas producing agents respectively, pouring into a medicine pressing mold, and according to the product structure: pressing the fully submerged product into phi 45.00mm +/-0.5 mm, h70.00mm drug columns and 1# 1, 2# and 3# blocks respectively; the fire extinguishing product in the engine compartment is pressed into phi 110.00mm +/-0.5 mm, h15.00mm explosive columns and 1# 1, 2# and 3# blocks respectively.
5. Assembling total submerged gas generators 1#, 2#, 3 #; and assembling the engine room fire extinguishing gas generators 1#, 2#, 3 #.
6. Assembling a non-pressure-storage dry powder extinguishing device to submerge 1#, 2#, and 3# completely; the engine room is assembled with a non-pressure storage type dry powder extinguishing device to extinguish fire 1#, 2#, and 3 #.
Effect verification: the non-pressure-storage dry powder extinguishing device is assembled by adding cooling materials dicyanodiamine and ammonium oxalate gas generating agents.
A gas generator obtained by the method of the embodiment of the invention (embodiment 2#, 3#) without adopting the temperature reduction technology of the invention (comparative example 1 #) was provided with 2-shot non-pressure-storage dry powder extinguishing devices at the same time and under the same condition, and comparative experiments were carried out.
1. And (3) testing items: injection time, remaining injection.
2. Assembling types are as follows: FFX-BCT8, engine compartment fire extinguishing FFB-BCD0.3 (0.3 kg).
3. The performance requirements are shown in table 1.
TABLE 1
4. Test conditions (normal temperature): the temperature was 30 ℃ and the relative humidity 60%, and the test was carried out on the day of assembly.
5. The test results are shown in tables 2, 3 and 4.
TABLE 2 comparative example products (1 #)
TABLE 3 example products (2 #)
TABLE 4 example products (3 #)
6. And (6) testing results.
Through comparison experiments, the non-pressure-storage dry powder extinguishing device of the comparison example has the spraying time less than or equal to 1s, is used for the total flooding test of common places, and both the spraying time and the spraying residual rate meet the index requirements. When the device is used for an engine room in a special place, the device is internally pressurized due to the arrangement of the guide pipe and the nozzle, the gas production rate is accelerated, the spraying time is shortened, dry powder in the device cannot be completely sprayed out, and the spraying residual rate does not meet the index requirement.
The cooling material is added into the gas generating agent of the non-pressure storage type dry powder fire extinguishing device in the embodiment No. 2 and No. 3, the gas generating rate is moderate, the spraying continuity is good, and the total flooding test of a common place and the spraying time and the spraying residual rate of an engine cabin used in a special place both meet the index requirements.
Claims (8)
1. A method for adjusting the medicament injection time of a gas generator of a non-pressure-storage fire extinguishing device is characterized in that a cooling material is added into a gas producing medicament to reduce the reaction temperature of the medicament; the gas-producing medicament is pressed into large medicament columns, so that the specific surface area of the gas-producing medicament is reduced, and the gas-producing medicament columns are uniformly combusted layer by layer.
2. The method of claim 1, wherein the temperature reducing material is ammonium oxalate or dicyanodiamine.
3. The method according to claim 1 or 2, characterized in that the temperature reducing material is added in a raw material mixing process in the production of the gas generating agent and is uniformly mixed together.
4. The method according to claim 1, wherein the amount of ammonium oxalate added is 1.0-20.0% of the mass of the gas generator gas generating agent, which depends on the gas generating agent and the injection time.
5. The method according to claim 1, wherein the dicyanodiamine is added in an amount of 1.0-10.0% by mass based on the gas generating agent of the gas generator, depending on the gas generating agent and the injection time.
6. The method of claim 1, wherein the gas generant grain containing temperature reducing material is pressed into larger pellets, and depending on the product structure: pressing the totally-submerged product into a phi 45.00mm +/-0.5 mm and h70.00mm drug column; the fire extinguishing product in the engine compartment is pressed into powder columns with the diameter of 110.00mm plus or minus 0.5mm and the diameter of h15.00mm.
7. The method of claim 1, wherein said pressing is with an oil press.
8. A method according to claim 6 or 7, characterized in that the pressing pressure is 10MPa-20 MPa.
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| CN202010920643.3A CN112044014A (en) | 2020-09-04 | 2020-09-04 | Method for adjusting medicament injection time of gas generator of non-pressure-storage fire extinguishing device |
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| CN202010920643.3A CN112044014A (en) | 2020-09-04 | 2020-09-04 | Method for adjusting medicament injection time of gas generator of non-pressure-storage fire extinguishing device |
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Citations (7)
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| GB627727A (en) * | 1946-11-29 | 1949-08-15 | James Taylor | Improvements in or relating to power-gas generating devices |
| CN1651360A (en) * | 2005-03-28 | 2005-08-10 | 张根发 | Gas producing composition and its preparation method |
| CN1651361A (en) * | 2005-03-31 | 2005-08-10 | 张根发 | Moulding product of gas producing medicinal preparation and its preparation method |
| CN1761636A (en) * | 2003-03-20 | 2006-04-19 | 奥托里夫Asp股份有限公司 | Binder matrix for gas generants and related compositions and methods |
| CN108863691A (en) * | 2018-08-03 | 2018-11-23 | 湖北航天化学技术研究所 | A kind of air bag gas-forming agent powder and its compacting preparation process |
| CN108947747A (en) * | 2018-07-25 | 2018-12-07 | 西安诚乐科工贸有限责任公司 | 5- Aminotetrazole/Nitrates gas-forming agent anti-moisture absorption method |
| CN109675245A (en) * | 2018-12-29 | 2019-04-26 | 浙江华神消防科技有限公司 | Clean type extinguishing chemical and its extinguishing device |
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2020
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB627727A (en) * | 1946-11-29 | 1949-08-15 | James Taylor | Improvements in or relating to power-gas generating devices |
| CN1761636A (en) * | 2003-03-20 | 2006-04-19 | 奥托里夫Asp股份有限公司 | Binder matrix for gas generants and related compositions and methods |
| CN1651360A (en) * | 2005-03-28 | 2005-08-10 | 张根发 | Gas producing composition and its preparation method |
| CN1651361A (en) * | 2005-03-31 | 2005-08-10 | 张根发 | Moulding product of gas producing medicinal preparation and its preparation method |
| CN108947747A (en) * | 2018-07-25 | 2018-12-07 | 西安诚乐科工贸有限责任公司 | 5- Aminotetrazole/Nitrates gas-forming agent anti-moisture absorption method |
| CN108863691A (en) * | 2018-08-03 | 2018-11-23 | 湖北航天化学技术研究所 | A kind of air bag gas-forming agent powder and its compacting preparation process |
| CN109675245A (en) * | 2018-12-29 | 2019-04-26 | 浙江华神消防科技有限公司 | Clean type extinguishing chemical and its extinguishing device |
Non-Patent Citations (3)
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| 徐复铭 等: "《能源火***在工农业中的应用——气体发生剂及气体发生器》", 30 September 1988, 国防工业出版社 * |
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Application publication date: 20201208 |