Method of converting non-conducting fiber felt into electrothermal active carbon fiber felt

The technology of activated carbon fiber felt and fiber felt is applied in the field of preparation of high-efficiency electric heating materials, which can solve the problems of short service life of metal electric heating materials, non-flammability of carbon fiber conductive paper, low qualification rate of manufacturing methods, etc. The effect of stable rate and lower implementation cost

Inactive Publication Date: 2004-06-02
张建春 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon fiber conductive paper is not flame retardant, heats unevenly, the manufacturing process is complicated, and the qualified rate of its manufacturing method is low; the existing carbon element printing electric heating materials have low strength and small heating area; metal electric heating materials have short life and high cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Embodiment 1: This embodiment is two carbonizations and two activations. 1. Use viscose-based fiber felt with a thickness of 1.0mm. After soaking with 3% phosphate solvent for half an hour, dry it with a hot air blower until the water content is 5%. 2. Then use the WTL-I carbonization furnace to implement the first carbonization at a speed of 40m / h. The temperature in the first stage is 180°C, the temperature in the second stage is 280°C, and the temperature in the third stage is 220°C. Continuous carbonization is carried out. Then use the same equipment to implement the second carbonization, and adjust the carbonization speed to 50m / h. The temperature of the first stage is 290°C, the temperature of the second stage is 410°C, and the temperature of the third stage is 270°C, and continuous carbonization is carried out.

[0016] 3. The fiber felt that has been carbonized twice, and then the WHL-I activation furnace is used for primary activation (the first activation):...

Embodiment 2

[0018] Embodiment two: the carbonization and activation of the present embodiment are still twice, 1, still select the viscose-based fiber felt for use, thickness 1.2mm, after soaking for 1 hour with 5% phosphate, dry to moisture content 5 with hot air blower %about.

[0019] 2. Then use the WTL-I carbonization furnace to implement the first carbonization at a speed of 20m / h. The temperature of the first stage is 220°C, the temperature of the second stage is 320°C, and the temperature of the third stage is 260°C, and continuous carbonization is carried out. Then use the same equipment to implement the second carbonization, and adjust the carbonization speed to 40m / h. The temperature of the first stage is 350°C, the temperature of the second stage is 490°C, and the temperature of the third stage is 330°C, and continuous carbonization is carried out.

[0020] 3. The fiber felt that has been carbonized twice, and then the WHL-I activation furnace is used for primary activation ...

Embodiment 3

[0022] Embodiment 3: 1. Select polypropylene fiber mat with a thickness of 0.8mm, soak it with 5% phosphate solvent for 1 hour, air dry, and the water content is ≤5%.

[0023] 2. Carry out three carbonizations with WTL-I type carbonization furnace. The speed and temperature of the first and second carbonization are the same as those in Example 1. The third carbonization speed is 30m / h. The temperature of the first stage: 320°C, the temperature of the second stage: 450°C, and the temperature of the third stage: 300°C. Three carbonizations are carried out continuously.

[0024] 3. Then use the WHL-I activation furnace to perform three activations (primary, advanced, and firm). The speed and temperature of the first (primary) and second (advanced) activations are the same as in Example 1. The third (firm) activation: speed: 50m / h. The first stage temperature: 700°C, the second stage temperature: 1150°C, the third stage temperature: 1000°C. The tertiary activation is perform...

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Abstract

The invention relates to the method for preparing the felt of the activated carbon fiber. The method incldues the four steps. (1) Selecting the material and medicine treatment. (2) Passing several times of the carbonizing treatment. (3) Passing several times of the activating treatment. (4) Cleaning up and clipping. The method selects the specific material and special treatment. The invented felt of the activated carbon fiber possesses the advantagesof high percent of yield, even electric density, simple manufacturing technique, large heating area, not burning, long service life and oxidation resistance.

Description

technical field [0001] The invention relates to the preparation of high-efficiency electric heating materials, in particular to a preparation method of activated carbon fiber felt. Background technique [0002] Current electric heating materials include carbon fiber conductive paper, carbon element printing electric heating materials and metal electric heating materials manufactured by wet papermaking method. Carbon fiber conductive paper is non-flammable, uneven heating, complex manufacturing process, and low pass rate of its manufacturing method; existing carbon element printing electric heating materials have low strength and small heating area; metal electric heating materials have short life and high cost. Contents of the invention [0003] The purpose of the present invention is to design a manufacturing method of activated carbon fiber felt. The activated carbon fiber felt produced by the method has the advantages of high qualified rate, relatively uniform electron ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/12D21H27/00H05B3/12
Inventor 宫永平张汝昆陈立年王铁平
Owner 张建春
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