RU103601U1 - TORCH HEAD FOR METHANOL DISPOSAL - Google Patents

Abstract

 1. The head of the flare installation for methanol utilization, comprising a casing with a combustion chamber with a burner, an air distribution device and an afterburning catalytic nozzle located in it, characterized in that the casing is mounted with the possibility of axial movement relative to the burner, the air distribution device is made in the form of a truncated cone or cylinder and installed coaxially between the combustion chamber and the burner with the formation of two radial clearances: the first - in relation to the burner and the second - from Ocean to the casing, wherein the casing at the bottom of the inner surface has a guide formed as inclined plates mounted on a screw line, and dozhigatelnaya catalytic nozzle mounted on the housing above the combustion chamber. ! 2. The head of the flare unit for methanol utilization according to claim 1, characterized in that the afterburning catalytic nozzle has a developed surface.

Description

The utility model relates to environmental protection and can be used in oil and gas fields and gas condensate fields, as well as in the production of methanol synthesis and in the paint and varnish industry for the treatment of waste gases or wastewater.

A known device is a reactor used for the catalytic oxidation of methanol [US Pat. No. 2332251 RU, B01D 53/86. Publ. 27.08.2008 Bull. No. 24], in which air is supplied to create a fluidized bed of particles of a solid alumina catalyst coated with oxide systems of magnesium and chromium; copper and chromium; copper, magnesium and chromium; iron oxide. Using an electric heater, a catalytic reactor is brought into operation at a temperature of (400-500) ° C, which is required for the oxidation reaction to proceed. After stabilization of the temperature regime, waste gases are introduced or an aqueous solution containing methanol is injected. The initial mixture may contain up to 90% water vapor.

The disadvantages of the reactor are: the inability to use it on the tip of the flare unit due to the possible overheating of the catalytic nozzle during the combustion of combustible gas; as well as the presence of an electric heater for heating the catalyst, the use of which requires additional energy consumption, and also complicates the design of the device.

Known chimney cleaning device [US Pat. No. 2189531 RU, F23J 15/02. Publ. 09/20/02 Bull. No. 26 (II part)], containing a cone-shaped nozzle having curved surfaces with guides and ribs twisting the air flow, a cone-shaped dirt trap, moreover, the cone-shaped nozzles are made of bimetal, and the profile of the helical grooves has the form of a dovetail.

The disadvantage of this cleaning device is the inability to utilize the methanol contained in the waste gas or steam-water mixtures, due to the lack of a catalytic nozzle.

Closest to the proposed is a device representing a furnace for cleaning waste gases [US Pat. No. 1010404 RU, F23G 7/06. Publ. 04/07/83. Bull. No. 13]. The furnace consists of a housing with nozzles for introducing contaminated and removing purified gas, a nozzle for condensate drain and a pipeline for supplying gas from the annulus of the heat exchanger-economizer to the refrigerator-condenser. Inside the housing there is also a heat exchanger, a chamber for controlling the temperature of the catalytic oxidation of hydrocarbons with heat electric heaters, and a catalytic nozzle.

The disadvantages of this device are the design complexity and the complexity of the service when it is placed on the tip of the flare unit. In addition, the presence of a heat electric heater requires additional energy consumption.

A new technical task is the creation of a device for the disposal of methanol, the design of which makes it possible to simplify its installation and operation on the tips of flare units while ensuring optimal temperature conditions for the operation of the catalytic nozzle.

To solve this problem, in the head of the flare unit for methanol utilization containing a casing, with a combustion chamber with a burner, an air distribution device and an afterburning catalytic nozzle located in it, the casing is mounted with the possibility of axial movement relative to the burner, the air distribution device is made in the form of a truncated cone or cylinder and installed coaxially between the combustion chamber and the burner with the formation of two radial clearances: the first in relation to the burner and the second w - in relation to the casing, and the casing in the lower part on the inner surface has guides made in the form of inclined plates mounted along a helical line, and the afterburning catalytic nozzle is mounted on the casing above the combustion chamber. Also, the afterburning catalytic nozzle has a developed surface.

Figure 1 shows a longitudinal section of the tip; figure 2 is a section aa, figure 3 is a section bb.

The tip of the flare installation for the disposal of methanol contains a casing 1 mounted on the burner 2 with a gap 3 forming a blow, and the casing has the possibility of axial movement relative to the burner. Between the combustion chamber 4 and the burner 2, an air distribution device 5 is installed in the form of a truncated cone or cylinder with the formation of a gap 6 with respect to the burner 2 and a gap 7 with respect to the casing 1. The casing on the inner surface has guides 8 (see Fig. 2) in the form of inclined plates mounted along a helical line. Above the combustion chamber 4 on the casing there is a post-combustion catalytic nozzle 9 with any additional cooling, for example, which can be implemented as a developed heat exchange surface 10 (see Fig. 3). The feed of the utilized mixture containing methanol is carried out through the pipe 11 directly to the burner 2. Combustible gas is supplied to the burner through the pipe 12. The temperature of the catalytic nozzle is controlled by a thermocouple 13.

The device operates as follows.

Combustible gas is supplied through the pipe 12 to the burner 2 and ignited by a standard ignition device (not shown in FIG. 1). Thanks to the air distribution device 5, an ejection effect is created in the gas stream from the burner and the air from the gap 3 is sucked into the casing 1. A part of this air enters the air distribution device 5, where it is mixed with combustible gas and the utilized mixture entering through the pipe 11. The prepared mixture is then ejected into the combustion chamber 4, where it is burned. Another part of the air entering through the gap 3, due to the draft created in the combustion chamber 4 by the ascending hot combustion products, enters the casing 1 to re-enrich the combustible mixture with oxygen. For more intensive mixing of the combustible mixture with air, the latter is twisted by means of guides 8. In addition, the air entering through the gap 3, passing along the inner surface of the wall of the casing 1, is used to oxidize methanol on the catalytic nozzle 9.

The optimum temperature of the catalytic nozzle 9 is in the range of (400-500) ° C and this temperature is controlled by a thermocouple 13. In order to avoid overheating of the catalytic nozzle, the height of the combustion chamber 4 (size L) is previously structurally selected. In the process of disposal, the temperature of the nozzle 9 can be adjusted by changing the gap 3, by moving the casing 1 in the axial direction, and thereby changing the flow rate of incoming air: when the air gap increases, it flows more into the casing 1, the size L increases and the temperature of the nozzle decreases. In addition, the temperature of the nozzle can be controlled by the flow of combustible gas in the pipe 12 and (or) by the flow of the utilized mixture in the pipe 11, because it can contain up to 90% of water vapor, then with increasing consumption of the mixture, the temperature of the nozzle will also decrease. The regulation process itself can be carried out automatically using a PC. For additional cooling of the catalytic nozzle, a developed heat-exchange surface 10 can be used. Due to the intensive mixing of the nozzle with combustion products from the combustion chamber 4, the nozzle also intensively transfers heat through the heat-exchange wall. Combustion products passing through a catalytic nozzle with an optimum temperature of (400-500) ° C are freed from traces of methanol and released into the atmosphere.

The proposed tip of the flare unit is simple in design, allows you to adjust and maintain automatically the optimum temperature of the catalytic nozzle, thereby ensuring complete utilization of waste gas or steam-water mixtures containing methanol.

Claims (2)

1. The head of the flare installation for methanol utilization, comprising a casing with a combustion chamber with a burner, an air distribution device and an afterburning catalytic nozzle located in it, characterized in that the casing is mounted with the possibility of axial movement relative to the burner, the air distribution device is made in the form of a truncated cone or cylinder and installed coaxially between the combustion chamber and the burner with the formation of two radial clearances: the first - in relation to the burner and the second - from Ocean to the casing, wherein the casing at the bottom of the inner surface has a guide formed as inclined plates mounted on a screw line, and dozhigatelnaya catalytic nozzle mounted on the housing above the combustion chamber. 2. The head of the flare unit for methanol utilization according to claim 1, characterized in that the afterburning catalytic nozzle has a developed surface.