CN-115972651-B - Method for increasing nitrogen and heat recovery amount in tire vulcanization process

CN115972651BCN 115972651 BCN115972651 BCN 115972651BCN-115972651-B

Abstract

The invention relates to a method for increasing nitrogen and heat recovery amount in a tire vulcanization process, and belongs to the field of tire vulcanization equipment. The tire positive vulcanization stage sequentially fills steam and nitrogen with certain pressure into the central mechanism through the nitrogen inlet valve, and during the tire positive vulcanization stage, the exhaust valve is adopted to discharge for a plurality of times, the exhaust valve is converged to a nitrogen recovery treatment system after passing through the heat exchanger, and meanwhile, the heat exchanger transmits part of heat of the exhaust to nitrogen which enters the central mechanism through the nitrogen inlet valve, and after the positive vulcanization stage is finished, nitrogen recovery is carried out through the nitrogen recovery valve, and heat is also recovered through the heat exchanger.

Inventors

SONG CHANGEN
WANG JIAN
WANG SHENGQUAN
MA HAIMIN
ZHANG JINYUN
ZHANG PEIGUANG
CONG MINGHUI

Assignees

三角轮胎股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221216

Claims (1)

1. A method for increasing the recovery amount of nitrogen and heat in tyre features that a nitrogen inlet valve is arranged at the inlet of central mechanism, a nitrogen recovery valve and a condensing valve are arranged at the outlet of central mechanism, the nitrogen recovery valve and the outlet pipeline of condensing valve are collected together, a heat exchanger is arranged between the collecting pipeline of nitrogen recovery valve and the outlet of condensing valve and the inlet pipeline of nitrogen inlet valve, during the positive vulcanization of tyre, the steam and nitrogen with a certain pressure are sequentially filled into central mechanism by nitrogen inlet valve, during the positive vulcanization of tyre, the condensing valve is used to discharge several times, the discharged materials of condensing valve are collected to the nitrogen recovery system after passing through heat exchanger, and at the same time the heat exchanger transfers part of heat to the nitrogen to be introduced into central mechanism by nitrogen inlet valve.

Description

Method for increasing nitrogen and heat recovery amount in tire vulcanization process Technical Field The invention relates to the field of tire vulcanization equipment, in particular to a method for increasing nitrogen and heat recovery amount in a tire vulcanization process. Background It is known that the vulcanisation of tyres is carried out between a heated mould and a bladder filled with an internal temperature medium mounted in a central mechanism. In the normal vulcanization stage, steam with certain pressure is filled into a central mechanism, nitrogen with higher pressure is filled after a preset time is reached, the nitrogen is maintained for a certain time, an automatic valve for discharging condensed water is needed to be used for discharging for a plurality of times, and after the normal vulcanization stage is finished, steps of nitrogen recovery, nitrogen discharge and the like are sequentially carried out to drain the vulcanization medium in the central mechanism, so that the die is opened to take out the vulcanized finished tire. In the vulcanizing process, partial nitrogen and heat are lost due to the multiple condensation removal steps in the positive vulcanizing stage, and a large amount of heat is still contained in the vulcanizing medium in the central mechanism after the positive vulcanizing is finished, and the nitrogen recovery step can recover partial nitrogen, but the heat carried by the recovered nitrogen is lost in the purifying process. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides a method for increasing the recovery amount of nitrogen and heat in the tire vulcanization process, which directly recovers the nitrogen discharged from the multiple condensation steps in the positive vulcanization stage and can recover the heat carried by the medium discharged from the central mechanism. The technical scheme includes that the method for increasing the nitrogen and heat recovery amount in the tire vulcanizing process is provided with a central mechanism, and is characterized in that a nitrogen inlet valve is arranged at an inlet of the central mechanism, a nitrogen recovery valve and a condensation discharging valve are arranged at an outlet of the central mechanism, the nitrogen recovery valve and an outlet pipeline of the condensation discharging valve are gathered together, a heat exchanger is arranged between the gathering pipeline of the nitrogen recovery valve and the outlet of the condensation discharging valve and an inlet pipeline of the nitrogen inlet valve, steam and nitrogen with certain pressure are sequentially filled into the central mechanism through the nitrogen inlet valve in a tire vulcanizing stage, the condensation discharging valve is adopted to discharge for a plurality of times during the tire vulcanizing stage, the condensation discharging valve discharge is gathered to a nitrogen recovery treatment system after passing through the heat exchanger, part of heat of the discharge is transferred to nitrogen which is going to enter the central mechanism through the nitrogen inlet valve through the heat exchanger at the same time, and after the vulcanizing stage is finished, the nitrogen recovery is carried out through the nitrogen recovery valve, and the heat is recovered through the heat exchanger. The invention has the beneficial effects that the nitrogen and heat recovery amount in the tire vulcanization process can be greatly increased by collecting the condensation discharging pipe and the nitrogen recovery pipe and adding the heat exchanger, so that the purposes of energy conservation and emission reduction are achieved. Drawings The invention will be further described with reference to the drawings and examples. FIG. 1 is a schematic diagram of the structure of the present invention. In the figure, a central mechanism, a nitrogen inlet valve, a nitrogen recovery valve, a condensation discharge valve and a heat exchanger are respectively arranged in the figure 1, the nitrogen inlet valve, the nitrogen recovery valve, the condensation discharge valve and the heat exchanger 5. Detailed Description In the figure, the invention is provided with a central mechanism 1, an inlet of the central mechanism 1 is provided with an automatic control valve such as a nitrogen inlet valve 2, an outlet of the central mechanism 1 is provided with an automatic control valve such as a nitrogen recovery valve 3 and a condensation discharge valve 4, the outlet pipelines of the nitrogen recovery valve 3 and the condensation discharge valve 4 are gathered together, and a heat exchanger 5 is arranged between the gathering pipeline of the outlets of the nitrogen recovery valve 3 and the condensation discharge valve 4 and the inlet pipeline of the nitrogen inlet valve 2. In the tire positive vulcanization stage, steam and nitrogen with certain pressure are sequentially filled into the central mechanism 1 through the nitrogen inlet val