SU124574A2 - Method for automatic control of regenerator temperature - Google Patents

Description

The described method for the automatic control of the temperature of the regenerators in installations for the separation of air by deep cooling - as compared with the method described in the main author. St. No. 123649, improves installation performance.

To this end, the electrical control system is designed in such a way that the distribution of fresh gas in the regenerators of the pair changes in one of the regenerators of each pair, and with the extreme temperature increase in both regenerators of the pair, the distribution of fresh gas flows between the pairs regenerators.

In the electrical control circuit, the device for measuring the temperature at the outlet of fresh gas from the regenerators has a boundary contact that closes at a set limit temperature and activates, through an intermediate relay, the corresponding throttle body at the inlet of fresh gas into the regenerators.

A command device is included in the circuit between the temperature gauge and the executive body for transmitting a time-limited controlled pulse to the executive body.

The impulse towards the closure of any throttle organ is given only when the throttle organ of the parallel regenerator is fully open.

The inclusion in the course of one cycle of the intermediate relays of two regenerators of one pair provides a pulse to the throttle body that distributes fresh gas between the pairs of regenerators.

FIG. Figure 1 shows the layout of devices, which ensures the implementation of the described method for two pairs of regenerators; in fig. 2-circuit regulation.

№ 124574

At the air outlet from each pair of regenerators 1, 2, 3, and 4, thermometers IT and 2Т are installed, connected to electronic recorders and signaling bridges JM and 2М. At the air inlet to the regenerators, switching valves 1К, 2К, ЗК, 4К are located. and throttle valves. The actuators of the valves include reversible magnetic actuators, 1RMP, 2RMP, ZRMP, 4РА1П. The valves are equipped with end switches 1KB, 2KB, ZKV, 4KB with one contact, doused in the open position of the valve.

On throttle valves there are 5KV, 6KV, 7KV, 8KB limit switches, the opening and closing of the contacts occurs when the throttle valve is fully opened. At the air inlet to one of the pairs of regenerators, a valve 9 with an electric actuator controlled by a reversible magnetic starter 5RMP is installed.

If the air temperature at the outlet of any regenerator interrupts the set maximum, contact 1M-1 or 2Ai-l of the corresponding bridge 1M or ZL-1 is closed. Depending on which of the regenerators is on a warm blast, through contacts 1KB- 1 or 2KB-} and, respectively, through the contacts SCK-1 or 4KB-1, one of the relays} P, 2P, 3R, 4P is switched on.

When the relay is turned on via the 1P-1, 2P-1, 3R-1, 4P-1 contacts, the command device 1KEP or 2KEP is activated. Turning on the relay continues for one turn of the command device disk; the time of one revolution of the cap disk should be more than half a period and less than the switching period of the regenerator valves. When the CEP dial is rotated for some adjustable length of time, an Impulse is given to the executive body. When the temperature rises, for example, the regenerator /, a pulse is applied via contact 1P-3 and contact 6KV-} to the terminals for opening the reverse magnetic starter 2RMP. Opening valve 6 increases and the temperatures of the two regenerators are compared. If the valve 6 turns out to be completely FULLY, then the contact 6KV-1 will be fed to the closing of the valve 5. Similarly, the valves of the other regenerators are controlled.

If the temperatures of one pair of regenerators, for example 1 to 2, are higher than the norm, then during one revolution of the CEP disk both the IP and 2P relays of this pair of regenerators will be turned on. Then through the CEP contact, which is closed at the end of the revolution, and contacts 1P-4 and 2P-4 will be given an impulse in the direction of closing the gate valve 9. If the temperature rises in the second pair of regenerators, the impulse will be supplied in the direction of opening the valve 9.

Subject invention

 1. A method for automatically controlling the temperature of regenerators, for example, in a deep-cooled air separation unit. St. No. 123649, characterized in that, in order to increase the capacity of the installation, fresh gas is supplied to the separate regenerators of each pair by installing throttle regulators on the fresh gas inlets.

2. A method according to claim 1, characterized in that the effect on the throttle bodies regulating the entry of fresh gas into the regenerators is automatically carried out by means of a boundary contact established at the exit of the fresh gas from the regenerators and closing at the set limit temperature.

3. Method according to PP. 1 and 2, characterized in that the throttle bodies at the inputs to the regenerators are interlocked with each other and the closure of one of them is possible only with a fully open throttle body of the parallel regenerator.

4. Method according to paragraphs. 1 and 2, characterized in that the impulse is supplied to the throttle body distributing fresh gas between the pairs by switching on two intermediate relays from the regenerators of one pair during one cycle.