Archives June 2022

Dear customers,
From now on, pentane, hexane and heptane can be mixed to be loaded into one container for shipment. The premise is that as long as the Bill of lading merchant shows the same consignee, the same shipper and the shipping company accepts it, shipment can be made. In other words, each product is no longer limited by the minimum packing quantity of a whole container load.

The following points shall be achieved for container mixed loading:
1、 Goods of different shapes and packages should not be packed together. It is easy to get confused.
2、 If the goods will exude dust, liquid, etc. from the packaging, they should not be placed together with other goods to avoid pollution. If they must be placed together, they should be isolated, such as using canvas or plastic film.
3、 How to put the goods of different weights? Put the light one on top of the heavy one.
4、 How to put the goods with different packing degrees? Put the strong one at the bottom and the light one at the top.
5、 If there are liquid and clean goods, it is better to put them under other goods.
6、 If there are goods with sharp corners or protruding parts in the goods, they need to be covered with something, otherwise other goods will be damaged.

Attention shall be paid to when loading sea containers

1. When the packing rate reaches 90%, it is necessary to be more cautious in packing.
2. After the container is towed, you should first check it, take the container paper to check the box number, take good care of the lead seal given to you by the driver, and write down the lead seal number.
3. In any case, when the goods are loaded into the container, the weight of the goods in the container shall not exceed the large loading capacity of the container, that is, the total amount of the container minus the dead weight of the container. Generally, the total weight and dead weight will be marked on the door of the container.
4. The unit volume weight of each container is specific, so when the same kind of goods are loaded in the container, as long as the density of the goods is known, it can be determined whether it is heavy or light.
5. During loading, the load on the bottom of the box shall be balanced, especially when the center of gravity of the load deviates from one end.
6. Avoid concentrated load. For example, when loading heavy goods such as mechanical equipment, the bottom of the box shall be paved with wood and other cushion materials to disperse the load as much as possible.
7. When using manual loading, pay attention to whether there are loading and unloading instructions such as “do not put upside down”, “place horizontally”, “place vertically” on the package. Be sure to use the loading tools correctly. It is forbidden to use the hand hook for baling. The goods in the box shall be loaded neatly and stacked tightly. For goods that are easy to be bundled loose and packed fragile, a pad or plywood shall be inserted between the goods to prevent the goods from moving in the box.
8. When loading pallet goods, it is necessary to accurately master the internal dimensions of the container and the external dimensions of the goods package, so as to calculate the number of loaded pieces, so as to minimize the number of abandoned places and load more goods.
9. When calculating the loading scheme, remember that there is an angle iron protruding from the upper left / right corner of the shipping container, leaving about 10x10x15cm space.
10. Cartons are not standard parts. Before loading, actually measure the size, not just based on the original data of the carton factory. In many cases, the middle of the cartons filled with goods will be slightly raised than the side. Therefore, it is prudent to keep a gap of about two centimeters around the inner periphery of the container during calculation.
11. Cartons are elastic and will be naturally dense after stacking. Before loading, first communicate with the loading and unloading foreman to let him roughly understand the loading scheme. But we must not slacken off. When doing physical work, people are not able to use their brains clearly, so they should pay attention to supervision nearby.
12. When the forklift truck is used for packing, it will be limited by the free lifting height of the machinery and the height of the gantry. Therefore, if conditions permit, the forklift can load two layers at a time, but there should be a specific gap between the top and bottom.
13. Generally, fork lift trucks with a common lifting capacity of 2 tons are used, and their free lifting height is about 1250px. However, there is also a forklift truck with full free lifting height. As long as the height of the box allows, this machine is not affected by the lifting height of the gantry, and can easily stack two layers of goods. In addition, it should also be noted that the skid should be laid under the goods so that the fork can be pulled out smoothly.
14. The goods should not be packed naked. At least they should be packed. Do not blindly damage the goods to save space. General goods will also be packed.

The press conference on industrial application results of pentane as a new welding and cutting fuel was held at China Shipbuilding Group Guangzhou shipbuilding International Co., Ltd. This achievement is the first successful industrial application of pentane as a new welding and cutting fuel in China.

“Pentane” usually refers to n-pentane, with the chemical formula of C5H12, which is the fifth member of alkanes. Pentane can be obtained from catalytic cracking and thermal decomposition of natural gas or petroleum, so pentane is also a by-product of oil refining process. In the past, it was mainly used to make low melting point organic solvents, foaming agents for plastic industry, artificial ice, etc. At the same time, pentane also has the characteristics of high combustion calorific value. After full combustion, pentane is safer and more environmentally friendly than conventional natural gas and other welding and cutting fuels. It is an ideal substitute for conventional fuels. Its high calorific value can also perfectly solve the problem of cutting thick ship plates and special steel plates in the shipbuilding industry.

It is understood that in order to promote the transformation and upgrading of product structure, Guangzhou shipbuilding international has undertaken the largest order for super large container ships with more than 16,000 containers in South China. The crack arrest steel applied to the deck, hatch enclosure and other key parts of the super large container ship has large thickness and high strength. It can achieve one-time forming by cutting with pentane with higher fuel value.

In three years, Guangzhou shipbuilding international and Shenghuo energy technology (Guangdong) Co., Ltd. have jointly developed a mobile blended light oil gasification system, which has solved the technical problems of stable gasification technology of liquid pentane welding and cutting fluid under normal temperature and pressure, pipeline transportation and pressure allocation of gasification equipment, and realized that pentane welding and cutting fluid can be supplied in the form of tank, and pentane welding and cutting fluid supply points can also be established through the gasification system, It provides a new green fuel choice for the industrial application of shipbuilding enterprises.

After application and inspection by a third-party testing agency, pentane welding and cutting fluid has obvious fuel saving effect, and the consumption of fuel and oxygen has been reduced by more than 30%; Cutting efficiency is close to or slightly higher than that of the existing natural gas; Compared with natural gas, it has obvious advantages in reducing slag hanging and preventing edge melting in medium and thick ship plate cutting.

A device for flame cutting and welding with pentane liquid as fuel comprises a jet suction cutting and welding torch, an evaporator and an oxygen cylinder. The oxygen joint of the jet suction cutting and welding torch is connected with a pressure regulating valve installed on the oxygen cylinder through a hose, and the gas joint of the jet suction cutting and welding torch is connected with the evaporator through a hose. The gas joint is equipped with a gas valve, and the evaporator is also equipped with a gas valve. The evaporator is equipped with an explosion-proof wire and a sieve plate, The screen plate is located at the bottom of the explosion-proof wire, and the lower part of the screen plate is equipped with a check valve and a silencing distributor. One end of the check valve is connected with the silencing distributor, and the other end is connected with the breathing valve located outside the evaporator through a pipe. A floating ball valve is also installed inside the evaporator, which is connected with the make-up valve outside the evaporator through a pipeline. After adopting the above device, compared with the gasoline cutting welder, the ignition performance is better and the stability is higher. The flame temperature of cutting and welding is up to 260 (RC ~ 280 (TC), and it is easy to adjust to carbonization flame, neutral flame and oxidation flame. When acetylene is burning, the carbonization flame has thick black smoke. The utility model does not have any black smoke, so the combustion ignition is easy, the flame is stable, and there is no backfire. The operation is simple. When cutting and welding is stopped, there is no smoke in the evaporator

It can stop working automatically because of negative pressure. The evaporator of the utility model has the advantages of simple structure, easy fabrication and low cost. Due to the negative pressure working condition, and an appropriate amount of explosion-proof wire is filled in the evaporator, the safety is very high. Practice has proved that the energy saving of the scheme of the utility model is more than 50% compared with that of acetylene gas and more than 25% compared with that of propane gas. Since the combustion temperature is about 400-500 ℃ higher than that of propane gas, steel plates or components with a thickness of less than 300mm can be cut smoothly. The steel plates cut by the combustion temperature are easier to process than the cutting edges cut by acetylene, and there is no slag at the bottom of the cutting edges, which is suitable for industrial needs. Figure 1 is the structural diagram of the device of the utility model. Specific implementation mode: the utility model is further described below in combination with the attached drawings. As shown in Figure L, this embodiment includes a jet suction cutting and welding torch L, an evaporator 2 and an oxygen cylinder 3. The oxygen joint of the jet suction cutting and welding torch 1 is connected with the pressure regulating valve 11 installed on the oxygen cylinder 3 through a hose. The gas joint of the jet suction cutting and welding torch 1 is connected with the evaporator 2 through a hose. The gas joint is equipped with a gas valve 12, and the evaporator 2 is also equipped with a gas valve 4. The evaporator is equipped with an explosion-proof wire 7 and a sieve plate 8, The screen plate 8 is located at the bottom of the explosion-proof wire 7. The lower part of the screen plate 8 is equipped with a check valve 9 and a silencing distributor 10. One end of the check valve 9 is connected with the silencing distributor 10, and the other end is connected with the breather valve 5 located outside the evaporator 2 through a pipe. A floating ball valve 13 is also installed inside the evaporator 2, and the floating ball valve 13 is connected with the make-up valve 6 outside the evaporator through a pipe. The specific working method of the utility model is as follows: when the regulating valve 11 on the oxygen cylinder 3 is opened and adjusted to the required pressure, the preheating valve 14 in the jet type cutting and welding torch L is opened, the jet suction device in the jet type cutting and welding torch 1 will generate negative pressure in the fuel channel, and then the gas valve 12 on the gas joint and the evaporator gas valve 4 are opened. The negative pressure will directly generate negative pressure in the evaporator 2 through the connecting pipe, and the breathing valve 5 is opened, The air flows upward through the breather valve 5, the check valve 9 and the silencing distributor 10, is evenly distributed through the sieve plate 8, and is violently mixed with the liquid amyl in the boiling state in the explosion-proof wire 7. The check valve 9 in the evaporator 2 is used to prevent the internal liquid from leaking out when the evaporator 2 is operating accidentally. Due to the low latent heat of vaporization and low boiling point of pentane, it can quickly absorb the heat of the external environment of the evaporator 2 made of metal and evaporate into a mixture of pentane gas and air with high concentration under the action of negative pressure. Under the action of negative pressure, pentane is continuously pumped into its injection and suction device by the injection and suction torch 1 and mixed with oxygen in proportion to form a fuel gas which is injected into the nozzle for combustion to achieve the purpose of cutting and welding. The pentane liquid can be filled by opening the make-up valve 6, which is sucked from the fuel storage tank to the evaporator 2. When the liquid level reaches a certain height, it will be automatically closed by the float valve 13. If ioo cutting torch is adopted for the above-mentioned jet suction cutting torch, the oxygen pressure of the cutting torch is 0.6MPa, the negative pressure of the gas interface is about 0.04 ~ 0.05Mpa, and the evaporation capacity of pentane liquid is 0.26 ~ 0.3l/h. The flame of the cutting torch can be easily adjusted to neutral flame, and the flame temperature is 2600 ° C ~ 2800 ° C, which can smoothly cut 100mm thick steel plate; If No. 8 jet suction welding torch is used for jet suction cutting torch 1, the required oxygen pressure is 03mpa, the negative pressure of gas interface is 0.035 ~ 0.04MPa, and the evaporation capacity of pentane liquid is 0.1 ~ 0.12l/h. The flame of the cutting torch can be easily adjusted to oxidation flame, neutral flame and carbonization flame, The flame temperature is 2600’c ~ 280 (TC, welding can be carried out smoothly. To sum up, the advantages of the utility model are: 1. The ignition performance of the utility model is better than that of the gasoline cutting welder, and the stability is high. The original propane injection cutting torch and welding torch do not need to be matched with the specially manufactured cutting torch or welding torch, which can save the enterprise’s equipment reinvestment investment and facilitate the purchase of vulnerable parts; 2. The safety is high, even if the cutting torch or welding torch is broken or accidentally damaged when working, it will not produce Danger caused by leakage of raw gas. Since the evaporator is filled with explosion-proof wire according to the standard, no explosion will occur; 3. The energy-saving effect is remarkable, and the production cost is greatly reduced; 5. As a by-product of petroleum industry and a class B green fuel, the waste gas after combustion is harmless to human body, which not only solves the problem of by-product of petroleum industry, but also ensures the safety and health of users; 6. The efficiency of cutting and welding has been improved. The cutting speed is slightly faster than that of acetylene. It is easy to operate and master. It is convenient to carry out construction outside. The utility model can not only be applied to the cutting of steel and the welding of metal, but also can be widely applied to glass fusion to replace the commonly used propane gas and natural gas, and has remarkable safety and energy-saving effects.

1. The device for flame cutting and welding with pentane liquid as fuel includes a jet suction cutting and welding torch (1), an evaporator (2) and an oxygen cylinder (3), which is characterized in that the oxygen joint of the jet suction cutting and welding torch (1) is connected with the pressure regulating valve (11) installed on the oxygen cylinder (3) through a hose, and the gas joint of the jet suction cutting and welding torch (1) is connected with the evaporator (2) through a hose, wherein the gas joint is provided with a gas valve (12), and the evaporator (2) is also provided with a gas valve (4), An explosion-proof wire (7) and a sieve plate (8) are installed inside the evaporator, the sieve plate (8) is located at the bottom of the explosion-proof wire (7), a check valve (9) and a silencing distributor (10) are installed below the sieve plate (8), one end of the check valve (9) is connected with the silencing distributor (10), and the other end is connected with the breather valve (5) located outside the evaporator (2) through a pipe.