JPS6347706Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an oxygen-enriched air supply device, and more specifically, the oxygen-enriched air is passed through an oxygen selectively permeable membrane to enrich it with oxygen by suctioning it with a suction pump. The present invention relates to an oxygen-enriched air supply device for supplying oxygen to a combustion furnace.

In such an oxygen-enriched air supply device, it is desirable that the amount of oxygen-enriched air supplied can be appropriately controlled according to the combustion load of the combustion furnace.

The present invention has been made based on the above-mentioned viewpoint, and an object of the present invention is to provide an oxygen-enriched air supply device that has a simple configuration and can control the amount of oxygen-enriched air supplied according to the combustion load. purpose.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of an embodiment of the present invention.
The burner 2 of the combustion furnace 1 is supplied with fuel, such as city gas, from a fuel supply source 3 via a pipe 4 .
On the other hand, the oxygen-enriched air that has passed through the oxygen selectively permeable membrane 5 is transferred to the suction pump 6 and the blower 7.
It is supplied to the burner 2 from the conduit 8 through the . The rotation speeds of the suction pump 6 and the blower 7 are controlled by the control means 9 according to the combustion load of the combustion furnace 1, so that an appropriate amount of oxygen-enriched air is supplied to the burner 2 according to the combustion load. Ru.

Electric power is supplied to the motor of the suction pump 6 and the motor of the blower 7 from a generator 11, which is driven by an internal combustion engine, for example, a gas engine 10. The gas engine 10 is supplied with city gas from the fuel supply source 3 via a pipe line 12, and a flow rate control valve 13 is provided in the middle of the pipe line 12. Therefore, as the opening degree of the flow rate control valve 13 is adjusted, the rotational speed of the gas engine 10 and, accordingly, the rotational speed of the suction pump 6 and the blower 7 are controlled.

In this embodiment, a fuel flow meter 14 is provided in the middle of the pipe line 4 as a means for detecting the combustion load. The value detected by this fuel flow meter 14 is given to the control means 9. In the control means 9, the opening degree of the flow control valve 13 is set in advance according to the fuel flow rate, and the opening degree of the flow control valve 13 is controlled according to the input value from the fuel flow meter 14.

In this way, the amount of oxygen-enriched air supplied is controlled according to the combustion load in the combustion furnace 1. Moreover, in this embodiment, since electric power from the generator 11 driven by the gas engine 10 is supplied to the suction pump 6 and the blower 7, the gas engine 10
Zero vibrations are not transmitted to the suction pump 6 and the blower 7.

FIG. 2 is a system diagram of another embodiment of the present invention,
Parts corresponding to the embodiment of FIG. 1 are given the same reference numerals. In this embodiment, for example, an oxygen concentration detector 16 is provided in the middle of the exhaust gas duct 15 of the combustion furnace 1, and the detected value of the oxygen concentration detector 16 is provided to the control means 17. The control means 17 controls the flow rate control valve 13 so that the detected value becomes a predetermined value.
, that is, the rotational speed of the suction pump 6 and the blower 7. Note that a carbon monoxide concentration detector or a carbon dioxide concentration detector may be used in place of the oxygen concentration detector 16.

FIG. 3 is a system diagram of still another embodiment of the present invention, and parts corresponding to each of the above-described embodiments are given the same reference numerals. In this embodiment, the fuel flow meter 14
The detected value of the oxygen concentration detector 16 and the detected value of the oxygen concentration detector 16 are provided to the control means 18. The control means 18 has an oxygen concentration preset according to the fuel flow rate, and controls the opening degree of the flow rate control valve 13 so that the detected value of the oxygen concentration detector 16 becomes a predetermined value.

As still another embodiment of the present invention, as shown in FIG. 4, the suction pump 6 and the blower 7 are driven individually by gas engines 10a and 10b, and the fuel flow rate control valves to the gas engines 10a and 10b are connected. 13a and 13b may be controlled by the control means 9 or the like.

In each of the embodiments described above, the blower 7 is provided downstream of the suction pump 6 in order to prevent pulsation caused by the suction pump 6, but the blower 7 may be omitted in other embodiments of the present invention.

As described above, according to the present invention, the amount of oxygen-enriched air supplied can be appropriately controlled using a simple configuration that controls the rotation speed of the internal combustion engine according to the combustion load.

[Brief explanation of the drawing]

Figure 1 is a system diagram of an embodiment of the present invention; Figure 2;
FIGS. 3 and 4 are system diagrams showing other embodiments of the present invention, respectively. 1... Combustion furnace, 2... Burner, 5... Oxygen selective permeation membrane, 6... Suction pump, 9, 17, 18...
Control means, 10, 10a, 10b... Gas engine, 14... Fuel flow meter, 16... Oxygen concentration detector.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Oxygen enriched by passing air through an oxygen selectively permeable membrane by suctioning with a suction pump, and supplying the obtained oxygen-enriched air to a combustion furnace. The enriched air supply device includes: an internal combustion engine for driving the suction pump; a means for detecting a combustion load in the combustion furnace; and a means for controlling the rotation speed of the internal combustion engine according to the combustion load. An oxygen-enriched air supply device featuring: (2) The oxygen-enriched air supply device according to claim 1, wherein the suction pump is directly connected to an internal combustion engine. (3) The oxygen-enriched air according to claim 1 of the utility model registration claim, characterized in that a generator is connected to the internal combustion engine, and the electric power generated by the generator is supplied to a motor of a suction pump. Feeding device. (4) The oxygen enrichment device according to claim 1, 2, or 3 of the utility model registration claim, wherein the means for detecting the combustion load is a flow meter for fuel supplied to the combustion furnace. Air supply device. (5) Utility model registration claims 1, 2, or 3, characterized in that the means for detecting the combustion load is a concentration detector of a predetermined component in the exhaust gas from the combustion furnace. Oxygen-enriched air supply device as described in Section 1. (6) In the means for controlling the rotation speed of the suction pump, the oxygen concentration in the exhaust gas from the combustion furnace is set in advance according to the fuel flow rate to the combustion furnace, and the oxygen concentration in the exhaust gas is set in advance according to the detected fuel flow rate. The oxygen-enriched air supply according to claim 1, 2, or 3 of the utility model registration claim, characterized in that the rotation speed of the suction pump is controlled so that the oxygen concentration of the air becomes a predetermined value. Device.