CN-116951989-B - Non-metal tube furnace sealing protective atmosphere system

Abstract

The invention discloses a sealing protective atmosphere system of a nonmetal tube furnace, which relates to the technical field of tube furnaces and comprises a nonmetal tube furnace arranged in a sealing heating chamber, and an atmosphere circulation system communicated with the sealing heating chamber, wherein the sealing heating chamber is provided with a leakage protection and detection system for detecting whether the condition of leakage of reaction atmosphere exists in the nonmetal tube furnace or not and preventing the leakage of the reaction atmosphere into the sealing heating chamber when the reaction atmosphere leaks. According to the invention, the nonmetallic furnace tube is sealed through the sealed heating chamber, so that the leakage of atmosphere from the nonmetallic furnace tube into the sealed heating chamber during high-temperature sintering is prevented, and meanwhile, the two ends of the nonmetallic furnace tube are sealed through the sealed transition piece, so that the leakage of reaction atmosphere is prevented. The sealing transition piece is positioned outside the sealing heating chamber, so that the influence of temperature on the sealing effect during sintering can be effectively reduced.

Inventors

• DENG YUANYING
• LI TAO
• LIU RUWEI
• Liao Xiantan
• FENG ZHAOHUI

Assignees

• 佛山市天禄智能装备科技有限公司

Dates

Publication Date

20260508

Application Date

20230807

Claims (2)

1. 1. The non-metal tube furnace sealing protective atmosphere system is characterized by comprising a non-metal tube furnace (2) arranged in a sealing heating chamber (1), wherein two ends of the non-metal tube furnace (2) penetrate through the sealing heating chamber (1), two ends of the non-metal tube furnace (2) are connected with the sealing heating chamber (1) through sealing transition pieces, and a material receiving device (3) for recycling materials is arranged at a material outlet of the non-metal tube furnace (2); The atmosphere circulation system is communicated with two ends of the nonmetal furnace tube (2) through a sealing transition piece and is also communicated with the sealing heating chamber (1), and the atmosphere circulation system is used for supplying a reaction atmosphere and a protective atmosphere to a feed inlet of the nonmetal furnace tube (2), recovering or treating tail gas of a discharge port and supplying the protective atmosphere into the sealing heating chamber (1); the sealed heating chamber (1) is provided with a leakage protection and detection system which is used for detecting whether the nonmetallic furnace tube (2) has leakage of the reaction atmosphere or not and preventing the reaction atmosphere from leaking into the sealed heating chamber (1) when the reaction atmosphere leaks; The atmosphere circulation system comprises a reaction atmosphere supply end (4) for providing a reaction atmosphere, a protective atmosphere supply end (5) for providing a protective atmosphere, a circulation device (6) for recycling gas and a tail gas treatment device (7) for discharging tail gas; the reaction atmosphere supply end (4) is communicated with a feed inlet of the nonmetal furnace tube (2) through a first atmosphere control valve (41); The protective atmosphere supply end (5) is communicated with a feed inlet of the nonmetal furnace tube (2) through a first protective atmosphere control valve (51); a first pressure monitor (21) is arranged at the feed inlet of the nonmetal furnace tube (2); The circulating device (6) is communicated with a discharge port of the nonmetal furnace tube (2) through a first waste gas control valve (61); The tail gas treatment device (7) is communicated with a discharge port of the nonmetal furnace tube (2) through a second waste gas control valve (71); The circulating device (6) comprises a cooler (62) communicated with a discharge hole of the nonmetal furnace tube (2) through the first waste gas control valve (61), an atmosphere filtering device (64) connected with the cooler (62) and an atmosphere recycling tank (63), and the atmosphere recycling tank (63) communicated with a feed hole of the nonmetal furnace tube (2) through a second atmosphere control valve (65); The protective atmosphere supply end (5) is communicated with the inner top of the sealed heating chamber (1) through a second protective atmosphere control valve (52), a second pressure detector (11) is further arranged at the inner top of the sealed heating chamber (1), a first exhaust valve (12) and a second exhaust valve (13) are arranged at the bottom of the sealed heating chamber (1), the second protective atmosphere control valve (52), the second pressure detector (11), the first exhaust valve (12) and the second exhaust valve (13) form a leakage protection and detection system, and the air pressure in the sealed heating chamber (1) is not less than the air pressure in the nonmetallic furnace tube (2); the sealing transition piece is composed of transition pieces (8) arranged at two ends of the nonmetal furnace tube (2) and a first sealing piece (9) sleeved on the outer wall of the nonmetal furnace tube (2) and used for sealing the transition pieces (8) and the nonmetal furnace tube (2); The first sealing piece (9) consists of two split sealing buckles, the two split sealing buckles are arranged on the outer wall of the nonmetal furnace tube (2), the outer wall of the split sealing buckle is provided with a high-temperature-resistant elastic sealing layer (92), the two split sealing buckles are detachably connected, the two split sealing buckles are respectively a thick buckle close to one side of the sealing heating chamber (1) and a thin buckle far away from the sealing heating chamber (1), the axial length of the thick buckle is greater than that of the thin buckle, and buckling joints of the thick buckle and the thin buckle are staggered; The split sealing buckle consists of two semi-rings (91) with symmetrical structures, wherein the two semi-rings (91) are detachably connected through screws, a high-temperature resistant elastic sealing layer (92) is arranged on the outer side wall of the semi-ring (91), a first threaded hole (93), a first limiting hole (94) and a positioning through hole (95) penetrating through the semi-ring (91) to the other side end face along the axial direction are selectively arranged on the inner side wall, the first threaded hole (93), the first limiting hole (94) and the positioning through hole (95) are one group, at least three groups are arranged on the end face of the semi-ring (91), a second threaded hole (96), a second limiting hole (97) and a detachable positioning column (98) are arranged on the end face of the other side, the positioning through hole (95) penetrating through the other side is formed by the second threaded hole (96), the second limiting hole (97), the positioning column (98) and the positioning through hole (95) are one group, at least three groups of the semi-ring (91) are arranged on the end face, and at least two adjacent positioning columns (97) are selectively inserted between the two limiting holes (91) or one group of the two adjacent positioning columns (97), the screw passes through the positioning through hole (95) of one semi-ring (91) and then is in threaded connection with the first threaded hole (93) or the second threaded hole (96) of the other semi-ring (91), and the two end surfaces of the semi-ring (91) are also provided with end surface sealing rings (99) made of high-temperature resistant elastic sealing materials; the sealing transition piece further comprises a second sealing piece (10), wherein the second sealing piece (10) is positioned in the sealing heating chamber (1) and is in tubular fit and arranged on the outer wall of the nonmetal furnace tube (2), a connecting ring (104) and an inserted sealing ring (106) are arranged at the end part of the second sealing piece (10), the second sealing piece (10) is selectively connected with the inner wall of the sealing heating chamber (1) through the connecting ring (104), and the inserted sealing ring (106) is positioned between the outer wall of the nonmetal furnace tube (2) and the side wall of the sealing heating chamber (1); The second sealing element (10) is a hollow structure formed by an outer tube wall (101) which can deform after being heated, an inner tube wall (102) which is attached to the outer wall of the nonmetal furnace tube (2), a deformation end (103) which is attached to the outer wall of the nonmetal furnace tube (106) and a connecting ring (104), one end of the outer tube wall (101) is connected with the connecting ring (104), the other end of the outer tube wall is connected with one end of the inner tube wall (102), the other end of the inner tube wall (102) is connected with one end of the deformation end (103), a gap is reserved between the deformation end (103) and the outer tube wall (101), an insertion end (105) which is attached to the outer wall of the nonmetal furnace tube (2) is arranged on the deformation end (103), the connection of the insertion end (105) and the deformation end (103) is located on the connection of the deformation end (103), and the insertion end (105) is provided with the insertion end (105) and the deformation end (106).
2. 2. The non-metal tube furnace sealing protective atmosphere system according to claim 1, wherein the non-metal tube furnace (2) is integrated or spliced in multiple segments and is made of non-metal high temperature resistant materials.

Description

Non-metal tube furnace sealing protective atmosphere system Technical Field The invention relates to the technical field of tube furnaces, in particular to a sealing protective atmosphere system of a nonmetal tube furnace. Background The lithium battery material sintering ultra-high temperature tube furnace, when in work, the material is sintered at high temperature, and sometimes special reaction atmosphere (including dangerous gases such as inflammable and easy, explosion, extremely toxic and the like) needs to be injected, so that the sealing performance is very tested. The high-temperature sintering reaction of the lithium battery material has very high requirements on the purity of the atmosphere, active gases such as air, oxygen and the like cannot be contained in the furnace atmosphere, inert protective gas needs to be injected when necessary, the reaction atmosphere and the protective gas are injected into the furnace according to the proportion, and the reaction atmosphere and the materials are subjected to the high-temperature sintering reaction under the high-temperature condition. The protective atmosphere is inert gases such as nitrogen, argon and the like, the protective atmosphere does not react, and is pumped out after being pumped into the furnace, so waste is caused, and therefore, a circulating atmosphere system is required to be designed for recycling the protective atmosphere, so that the production cost is reduced. The pressure in the high-temperature tube furnace for lithium battery materials is larger than the external pressure after the lithium battery materials are injected into the high-temperature tube furnace, the dangerous gas leakage can cause serious consequences, the sealing requirement is very high, the common sealing structure is difficult to seal on a non-metal material, the temperature of the furnace tube is very high, the sealing performance of the rubber material with good sealing performance cannot bear high temperature, the sealing performance of the sealing material capable of bearing high temperature is poor, the non-metal furnace tube with high temperature can be divided into an integral type and a multi-section splicing type, and the atmosphere can leak out from the non-metal furnace tube under the high-temperature environment, so that the problem of completely sealing the non-metal furnace tube with ultra-high temperature is also solved by the invention. Therefore, there is a need for a non-metallic tube furnace sealing protective atmosphere system that at least partially addresses the problems of the prior art. Disclosure of Invention In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter. In order to at least partially solve the problems, the invention provides a non-metal tube furnace sealing protective atmosphere system, which comprises a non-metal tube furnace arranged in a sealing heating chamber, wherein two ends of the non-metal tube furnace penetrate through the sealing heating chamber, two ends of the non-metal tube furnace are connected with the sealing heating chamber through sealing transition pieces, and a discharge hole of the non-metal tube furnace is provided with a material receiving device for recycling materials; The atmosphere circulation system is communicated with two ends of the nonmetal furnace tube through a sealing transition piece and is simultaneously communicated with the sealing heating chamber, and the atmosphere circulation system is used for supplying reaction atmosphere and protective atmosphere to a feed inlet of the nonmetal furnace tube, recycling or treating tail gas of a discharge port and supplying protective atmosphere to the sealing heating chamber; The sealed heating chamber is provided with a leakage protection and detection system for detecting whether the nonmetallic furnace tube has the condition of leakage of the reaction atmosphere and preventing the reaction atmosphere from leaking into the sealed heating chamber when the reaction atmosphere leaks. Preferably, the nonmetallic furnace tube is an integral or multi-section spliced type and is made of nonmetallic high-temperature resistant materials. Preferably, the atmosphere circulation system comprises a reaction atmosphere supply end for providing a reaction atmosphere, a protective atmosphere supply end for providing a protective atmosphere, a circulation device for recycling gas, and a tail gas treatment device for discharging tail gas; The reaction atmosphere supply end is communicated with the feed inlet of the nonmetal furnace tube through a first atmosphere control valve; the protective atmosphere supply end is communicated with the feed inlet of the