Apparatus for vapor generation

申请号 US28948372 申请日 1972-09-15 公开(公告)号 US3851146A 公开(公告)日 1974-11-26
申请人 DOW CHEMICAL CO; 发明人 BENNETT F;
摘要 An apparatus for providing, in a continuous or intermittent manner, a superheated vapor of an organic liquid, such as methylene chloride, for reflowing plastic surfaces or causing a plastic material to flow onto a surface to create a film or coating thereon. The apparatus includes a tubular metal member defining a flow passage for both the liquid and gaseous phases of the liquid being vaporized. A vapor flow control member having a vapor flow orifice is provided at one end of the tubular member while the other end of the tubular member communicates with a source of organic liquid under pressure through an on-off valve. A source of electrical energy is connected in circuit with the tubular member through a switch operated concurrently with the valve whereby electrical current is caused to flow through the tubular member to heat the member to a temperature adequate to vaporize the liquid flowing therethrough. The tubular member is electrically and thermally insulated by a shield and a handle associated with the shield contains the valve and switch.
权利要求
1. An apparatus for converting a volatilizable organic liquid or mixture of liquids into superheated vapors which consists essentially of: a tubular metal member which is electrically conductive but has a resistance to the flow of an electrical current and which member defines a flow path for the liquid to be vaporized and for the vaporized liquid, a vapor flow control member at one end of said tubular metal member, said vapor control member having a vapor outlet orifice, a manually actuated open-close liquid flow control member at the opposite end of said tubular metal member for selectively controlling liquid flow into said tubular metal member, a source of electrical energy connected at a pair of spaced points to said tubular metal member by means arranged to be controlled concurrently with and in on-off corresponding relationship with said liquid flow control member whereby electrical energy is caused to flow through a predetermined segment of said tubular metal member to heat the tubular metal member to a temperature to vaporize the liquid flowing therethrough, a source of volatilizable organic liquid connected in flow communication with the tubular metal member through said liquid flow control member, said source of liquid being under superatmospheric pressure whereby the liquid therein is caused to flow into the tubular metal member when the liquid flow control member is opened, the tubular metal member being heated to such a temperature and the length of the heated portion of the tubular metal member, the bore of the tubular metal member and the orifice of said vapor flow control member being of such a size relative to each other such that the liquid supplied under pressure into the tubular metal member will vaporize and said vapor will be heated to above its boiling point at a rate to maintain a pressure of vapor at the vapor flow control member sufficient to propel the vapors from the apparatus at least about one foot, said means connecting said electrical energy source to said tubular metal member including connectors in current flowing contact with the respective ends of said tubular metal member, said electrical energy source being connected in circuit with said connectors and said connecting means further including a switch associated with said liquid flow control member in concurrent similarly functioning open-close relation to said liquid control member for controlling application of energy to said connectors from said source whereby electrical current is caused to flow through the tubular member to heat the member to a temperature adequate to vaporize the liquid flowing therethrough, a connector connecting said tubular metal member through said liquid flow control member to said source of vaporizable organic liquid, said tubular metal member, vapor flow membeR, and said liquid flow control member being capable of withstanding superatmospheric pressures and a temperature of 1,200*F. and said electrical energy connectors and switch being capable of withstanding five to ten KVA alternating current power, said tubular metal member electrically and thermally insulated by a shield and a handle associated with said shield and containing the liquid flow control member and the switch, said vapor control member projecting from one end of the shield.
2. An apparatus for converting a volatilizable organic liquid or mixture of liquids into superheated vapors which consists essentially of: a tubular metal member which is electrically conductive but has a resistance to flow of an electrical current and which member defines a flow passage for carrying both liquid and gaseous forms of said liquid to be vaporized, a vapor flow control member at one end of said tubular metal member having a vapor outlet orifice, a manually operated open-close liquid flow control member at the other end of said tubular metal member for controlling liquid flow into the tubular metal member, said tubular metal member being disconnectable and removable from said flow control member, electrical energy connectors in current flowing contact with the respective ends of said tubular metal member, an electrical current source in circuit with said electrical energy connectors and a switch associated with said liquid flow control member in concurrent similarly functioning open-close relation to said liquid control member for controlling application of energy to said connectors from said source whereby electrical current is caused to flow through the tubular member to heat the member to a temperature adequate to vaporize the liquid flowing therethrough, a connector associating said tubular metal member through said liquid flow control member to a source of vaporizable organic liquid and means associated with the source for causing the liquid to flow into the tubular metal member when the fluid control member is opened, said tubular metal member, vapor flow member, and said liquid flow control member being capable of withstanding superatmospheric pressures and a temperature of 1,200*F. and said electrical energy connectors and switch being capable of withstanding five to ten KVA alternating current power, said tubular metal member electrically and thermally insulated by a shield and a handle associated with said shield and containing the liquid flow control member and the switch, said vapor control member projecting from one end of the shield.
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