Solution heating device in fuel cell test system

Abstract

The invention discloses a solution heating device in a fuel cell test system, which comprises a test tube-shaped double-layer quartz glass tube. An inlet tube and an outlet tube are arranged on the top edge and the bottom edge of an outer wall of the double-layer quartz glass tube and are communicated with a cavity between an inner wall and an outer wall. An infrared heating rod is inserted into the double-layer quartz glass tube. The infrared heating rod is directly inserted into an inner hole of the double-layer quartz glass tube, and heats the inner wall of the double-layer quartz glass tube and the solution between the inner wall and the outer wall through infrared radiation, and the heating heat radiation loss can be effectively prevented. Therefore, the heating efficiency is improved and the energy is saved.

Description

technical field [0001] The invention relates to a device for heating a strong acid and strong alkali solution used in a test in a fuel cell test system. Background technique [0002] In the fuel cell test system, the strong acid and strong alkali solution in transmission needs to be heated in real time. For the heating of strong acid and strong alkali and other corrosive solutions in transmission, although there are many different solutions, they all have different defects. [0003] Among the existing solutions, the most commonly adopted solution is to transmit the solution inside the stainless steel pipe, and surround the heating device outside, such as heating wire, heating belt, heating ring, etc., and heat the solution inside the stainless steel pipe by energizing these heating devices Effect. But in this scheme, there are the following disadvantages: (1) The so-called stainless steel, in fact, will rust when it encounters strong acid and alkali, even if it is made of 3...

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Problems solved by technology

But in this scheme, there are the following disadvantages: (1) The so-called stainless steel, in fact, will rust when it encounters strong acid and alkali, even if it is made of 316 material with the best acid and alkali resistance. Stainless steel is also not completely resistant to strong acid and alkali corrosion, so if this stainless steel tube is used as a heating and transmission channel, the stainless steel tube must be replaced every few months, otherwise there will be a danger of leakage due to corrosion, and light It will pollute the environment, and if it is serious, it will cause a short circuit of the wire and cause a fire.

(2) Even if the stainless steel tube is not replaced, a large number of impurities will fall off on its inner wall due to rust and corrosion. These fallen hybrids will be mixed into the acid-base solution, which will affect the accuracy of the test. For DAFC that requires high-purity solutions The fuel cell test system is simply unacceptable

(3) The heating device is wrapped outside the stainless steel tube, the heat of the heating device will be lost due to external radiation, not only the heating efficiency is low, but also the power energy is greatly wasted

But because it is a kind of plastic itself, the acid and alkali resistance is very good, but the high temperature resistance is not up to the requirement

If heating is carried out according to the above-mentioned method, the PTFE conduit is surrounded by high-temperature components such as heating wire, heating belt, and heating ring, and the plastic conduit will be melted soon, resulting in leakage of the solution, and even a fire caused by a short circuit of the wire.

Therefore, this material can only be used for low temperature storage or transmission of strong acid and alkali solutions, but not for direct heating

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