CN201193259Y

CN201193259Y - Oxidation furnace

Info

Publication number: CN201193259Y
Application number: CNU2008200192444U
Authority: CN
Inventors: 高长星; 李松峰; 李传金; 李军
Original assignee: TUOZHAN FIBER CO Ltd WEIHAI
Current assignee: TUOZHAN FIBER CO Ltd WEIHAI
Priority date: 2008-03-26
Filing date: 2008-03-26
Publication date: 2009-02-11
Anticipated expiration: 2018-03-26

Abstract

The utility model relates to an oxidation furnace which belongs to the field of carbon fiber production equipment. The oxidation furnace is provided with a furnace; one side of the furnace is subsequently provided with a hot air outlet and a return air inlet which are communicated with the inner cavity of the furnace at intervals; the other return air inlet and the other hot air outlet which are communicated with the inner cavity of the furnace are subsequently arranged on the other side of the furnace at intervals and corresponding to the hot air outlet and the return air inlet; the corresponding hot air outlets and the return air inlets are communicated. The utility model ensures the even temperature in the furnace, can fully oxidize protofilament, improve the production capability of the oxidation furnace and reduce the production cost.

Description

Oxidation furnace

Technical field

The utility model is a kind of carbon fiber production equipment, the oxidation furnaces in the carbon fiber production process specifically.

Background technology

As everyone knows, a complete carbon fibre carbonizing production line mainly is made up of following equipment: threading running out machine, oxidation furnace, carbide furnace, surface processing equipment (electrolysis machine, rinsing machine, starching machine and drying oven), drive unit, receipts silk machine and other corollary equipments etc.

The main raw material(s) of producing carbon fiber is a polyacrylonitrile-based precursor, undressed precursor is a combustible material, be easy to burning at normal temperatures, carry out pre-oxidation treatment so must will be introduced into oxidation furnace at the preceding precursor of high temperature cabonization (carburizing temperature is between 400 ℃～1500 ℃), pre-oxidation treatment is an oxidation, dehydrogenation, denitrogenation, the process of cyclisation, reach carbon by this process, the purpose of oxygen element enrichment and fiber typing, final purpose is to make the linear molecule chain structure of polyacrylonitrile fibril be converted into heat-resisting trapezoidal molecular chain structure pattern, make it when high temperature cabonization, keep fiber form and do not burn, so the pre-oxidation treatment process also is called " not burning processing " process.Also can obtain a conclusion thus, oxidation furnace is one of key equipment of producing by the high-quality carbon fiber.

The flow process of precursor pre-oxidation is as follows, the debatching from the threading running out machine of multi beam precursor, traction by deflector roll enters and exits oxidation furnace and carries out oxidation processes, in 200 ℃～300 ℃ homogeneous temperature field, the hot-air generation oxidation reaction that flows with certain speed in precursor and the stove, and the hot-air that flows can be subjected to the resistance of precursor tow when moving in stove, when resistance acquires a certain degree, speed air flow reduces, and can have influence on the uniformity of temperature in the stove thus, finally can have influence on the oxidation effectiveness of precursor.For little tow (1K, 3K and 6K; 1K---refer to that a branch of precursor contains 1000 fine filament) precursor, little and yarn sheet is thin because of tow, and comparative resistance is little, and is just can oxidation under the effect of slight hot blast saturating; But for 12K and above specification precursor, big and yarn sheet is thick because of tow, inner to be difficult to oxidation saturating for tow under the effect of slight hot blast; Existing as shown in Figure 1 its side of sending hot-air mouth all to be positioned at body of heater of oxidation furnace, its return air inlet then all is positioned at the opposite side that send hot-air mouth relative, and under equal conditions, it is good to be easier to oxidation from the near precursor of air outlet, and it is saturating to be difficult to oxidation from air outlet precursor far away.Traditional solution, the one, the flowing velocity that adopt to increase hot-air can be abundant the precursor oxidation, blown the disconnected lousiness that forms but the direct result that wind speed increases is a parts of fine long filament in the fiber, influences the quality of final products; The 2nd, enter precursor tow number in the stove by minimizing, reduce resistance as much as possible to hot-air, with fully saturating the precursor oxidation, but the result who does like this is the production capacity that has reduced oxidation furnace, production cost improves relatively.

Summary of the invention

In order to solve the deficiency of above-mentioned existing equipment technology, the purpose of this utility model provides a kind of oxidation furnace, utilize the interactive oxidation furnace that send the hot blast mode to make effectively to solve the above-mentioned problem, under the condition that does not increase hot blast speed, the precursor number that enters in the oxidation furnace can be as much as possible, for the possibility oxidation is abundant inadequately greatly because of drag effects in a certain period with a branch of precursor tow, but can diminish relatively because of being subjected to drag effects in next period, profound oxidation reaction can be proceeded; Same, on tow, it is far and near and influence the problem of pre-oxidation effect to think that to a certain extent precursor no longer exists from air outlet from two side action for hot blast.

The utility model adopts following technical solution: be provided with body of heater, be interval with successively on body of heater one side communicate with the body of heater inner chamber send hot-air mouth and return air inlet, send the relative body of heater opposite side of hot-air mouth and return air inlet then to be interval with the return air inlet that communicates with the body of heater inner chamber successively and to send hot-air mouth, the corresponding hot-air mouth that send is connected with return air inlet.

The beneficial effects of the utility model are: guarantee the uniformity of temperature in the stove, can be fully saturating the precursor oxidation, and can improve the production capacity of oxidation furnace, reduce production costs.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of background technology.

Fig. 2 is a structural representation of the present utility model.

Among the figure: 1. send hot-air mouth, 2. return air inlet, 3. hot blast flow direction, 4. oxidized fibre.

The specific embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments, to help understanding content of the present utility model.

As shown in Figure 2, the utility model is provided with body of heater, be interval with successively on body of heater one side communicate with the body of heater inner chamber send hot-air mouth 1 and return air inlet 2, send hot-air mouth 1 and return air inlet 2 relative body of heater opposite sides then to be interval with the return air inlet 2 that communicates with the body of heater inner chamber successively and to send hot-air mouth 1, the corresponding hot-air mouth 1 that send is connected with return air inlet 2, oxidized fibre 4 passes the body of heater inner chamber, send hot-air mouth 1 in the body of heater inner chamber, to be blown into hot blast, hot blast flow direction 3 is perpendicular to oxidized fibre 4 directions, because a plurality of side that hot-air mouth 1 is located at body of heater successively and relative opposite sides of sending, a plurality of return air inlets 2 are located at a side of body of heater and relative opposite side too successively, utilize the interactive oxidation furnace that send the hot blast mode to make to have under the condition that does not increase hot blast speed like this, the precursor number that enters in the oxidation furnace can be as much as possible, for the possibility oxidation is abundant inadequately greatly because of drag effects in a certain period with a branch of precursor tow, but can diminish relatively because of being subjected to drag effects in next period, profound oxidation reaction can be proceeded; Same, on tow, it is far and near and influence the problem of pre-oxidation effect to think that to a certain extent precursor no longer exists from air outlet from two side action for hot blast.

Claims

1. oxidation furnace, be provided with body of heater, it is characterized in that: be interval with successively on body of heater one side communicate with the body of heater inner chamber send hot-air mouth and return air inlet, send the relative body of heater opposite side of hot-air mouth and return air inlet then to be interval with the return air inlet that communicates with the body of heater inner chamber successively and to send hot-air mouth, the corresponding hot-air mouth that send is connected with return air inlet.