CN106809538A - A kind of inside pipe-connecting mode of bromine tank container - Google Patents

Abstract

The invention relates to a manufacturing method of a 20-foot liquid bromine tank type container tank. Provide a kind of internal connection form and manufacturing method of the liquid bromine container tank body: the method of using the inner tank pipeline (picture) covered with metal lead layer inside and outside the steel pipe instead of the polytetrafluoroethylene pipe as the pipeline inside the tank body of the liquid bromine tank type container . After adopting this method, due to the strong corrosion resistance of metal lead to liquid bromine, the service life of the pipeline is extended, and the situation that the entire pipeline must be replaced frequently during the service life cycle of the liquid bromine tank container is avoided, reducing the cost of the liquid bromine tank container. The cost of using the container and increasing the turnaround time of the liquid bromine tank container. Because the steel pipe has higher strength and can withstand greater pressure in the tank, and the cost of the metal lead material covered by the steel pipe is lower, the manufacturing cost of the liquid bromine tank container is reduced.

Description

An internal connection method of a liquid bromine tank container

technical field

The invention belongs to the technical field of manufacturing liquid bromine storage and transportation devices, and in particular relates to a manufacturing method of a 20-foot liquid bromine tank container.

Background technique

Bromine is an important product of salt chemical industry. Bromine has a wide range of uses. It is the basic chemical raw material for the manufacture of various bromine salts and organic bromides, and is widely used in the petroleum industry, chemical industry and pharmaceutical industry. It is the main raw material of fuel antiknock agent, flame retardant, fire extinguishing agent, dye intermediate, photosensitive material, insecticide, refrigerant and other products.

Bromine is a diatomic molecule with a molecular formula of Br2 and a molecular weight of 159.81. Bromine is a highly toxic and highly corrosive liquid. The specific gravity of bromine is 3.12g/cm ³ , which is heavier than water and 3.12 times that of water. The melting point of bromine is -7.25°C and the boiling point is 58.78°C.

The chemical properties of bromine are very active, and it is very easy to react with other metals except silver, lead, platinum, and tantalum, and release a lot of heat at the same time. Bromine has little corrosive effect on glass, ceramics, PTFE plastics, diabase, granite and other materials.

Generally, ceramic altars are used for storage and transportation of bromine in small packages. The net weight of each altar is 25kg or 30kg. After the porcelain altars are packed into wooden boxes, they are packaged and transported.

The lead-lined tank container (Figure 1) is used for large-package transportation, and its structure is to install a lead-lined steel tank on the tank saddle in the container frame. All valves and pipelines in the tank are installed on the valve mounting flange on the top of the tank and closed with a valve box.

The pipelines in the tank, such as liquid inlet pipe, liquid outlet pipe, and compressed nitrogen gas, use polytetrafluoroethylene pipes as the pipes inside the tank to ensure that the tank container can be filled with liquid bromine and discharged with liquid bromine.

At present, polytetrafluoroethylene pipes are used as the pipes inside the tank, which has the following disadvantages:

Since PTFE is not very resistant to liquid bromine corrosion, the PTFE pipeline must be replaced as a whole during the service life of a liquid bromine tank container, which will affect the use cost of the liquid bromine tank container and increase the liquid bromine tank container idle time.

Due to the low strength of PTFE and the liquid bromine tank container needs to withstand a certain pressure, the PTFE pipe needs a larger wall thickness.

In addition, the price of polytetrafluoroethylene is relatively high, which affects the manufacturing cost of liquid bromine tank containers.

Contents of the invention

The main technical problem to be solved by the present invention is to provide an internal connection form and manufacturing method of a liquid bromine container tank body, which can avoid the problem caused by the poor corrosion resistance of polytetrafluoroethylene in a liquid bromine tank container. During the service life cycle, the PTFE pipeline must be replaced frequently as a whole, which affects the use cost of the liquid bromine tank container and increases the idle time of the liquid bromine tank container. At the same time, it can also avoid the low strength of PTFE, The liquid bromine tank container needs to withstand a certain pressure, so that the PTFE pipe needs a larger wall thickness, and avoids the high manufacturing cost of the liquid bromine tank container due to the high price of PTFE , reducing the manufacturing cost.

In order to solve the above problems, the present invention adopts the pipeline in the tank (Fig. 3) covered with metal lead layer inside and outside the steel pipe to replace the polytetrafluoroethylene pipe as the method of the pipeline inside the liquid bromine tank type container tank body. It is characterized in that its steps are:

1) Firstly, carbon steel pipes are made into pipe fittings.

2) Cover the inner and outer surfaces of the carbon steel pipe with a layer of metallic lead.

3) A layer of metallic lead is covered on both sides of the end cap of the carbon steel pipe fitting.

4) The surface of the end of the steel pipe is covered with a layer of metallic lead.

5) Install the pipe fittings covered with lead layer on the valve installation flange on the top of the tank with valve installation bolts to install the valve and pipeline (Figure 2).

After adopting this method, due to the strong corrosion resistance of metal lead to liquid bromine, the service life of the pipeline is extended, and the situation that the entire pipeline must be replaced frequently during the service life cycle of the liquid bromine tank container is avoided, reducing the cost of the liquid bromine tank container. The cost of using the container and increasing the turnaround time of the liquid bromine tank container. Because the strength of steel pipe is much higher than that of polytetrafluoroethylene, it can withstand greater pressure in the tank. Moreover, the material cost of the metal lead covered by the steel pipe is relatively low, which reduces the manufacturing cost of the liquid bromine tank container.

Description of drawings

Fig. 1 is the structural representation of liquid bromine tank type container described in the present invention;

Fig. 2 is a schematic diagram of the valve pipeline installation structure of the present invention;

Fig. 3 is a schematic diagram of the pipeline structure in the tank of the present invention;

detailed description

An internal connection method of a liquid bromine tank container: a method in which the inner tank pipeline (Fig. 3) covered with a metal lead layer inside and outside the steel pipe is used instead of the polytetrafluoroethylene pipe as the pipeline inside the tank body of the liquid bromine tank container. Include the following steps:

1) Firstly, carbon steel pipes are made into pipe fittings.

2) Cover the inner and outer surfaces of the carbon steel pipe with a layer of metallic lead.

3) A layer of metallic lead is covered on both sides of the end cap of the carbon steel pipe fitting.

4) The surface of the end of the steel pipe is covered with a layer of metallic lead.

5) Install the pipe fittings covered with lead layer on the valve installation flange on the top of the tank with valve installation bolts to install the valve and pipeline (Figure 2).

Also, the metal lead layer in step 2 is 2mm.

Also, the metal lead layer in step 3 is 4mm.

Also, the metal lead layer in step 4 is 3mm.

Claims (1)

1. a kind of inside pipe-connecting mode of bromine tank container.It is characterized in that：Using outer covering metallic lead layer in steel pipe In tank pipeline as the pipeline in portion in bromine tank container body method：

1) carbon steel pipe is made pipe fitting first.

2) one layer of metallic lead of 2mm is covered in carbon steel pipe surfaces externally and internally.

3) one layer of metallic lead of 4mm is covered on the end cap two sides of carbon steel pipe fitting.

4) steel tube end part surface covers one layer of metallic lead of 3mm.

5) pipe fitting of lead layer will be covered, pipeline in valve and tank is arranged on the valve mounting flange of tank deck with valve installation bolt On.