A rapid switching device for chlorination furnaces used in chlorination production lines

Abstract

This invention belongs to the field of control system technology, specifically relating to a rapid switching device for chlorination furnaces in a chlorination production line. It is used for the rapid switching control of chlorination furnaces in at least two chlorination production lines. Each chlorination production line has two chlorination furnaces configured with one in operation and one on standby. The rapid switching device includes a standard cabinet integrating various control components, including circuit breakers, terminal blocks, 24V relays, 24V switching power supplies, redundant modules, and transfer switches. This invention allows the equipment to transmit signals to different control system loops, enabling the device to switch to different systems. The switching device uses a cross-power supply mode, which reduces system load and improves system safety and stability. It maximizes the utilization of chlorination furnace equipment in chlorination production, expands chlorination production lines, and is not limited to chlorination production, exhibiting significant compatibility with other production systems.

Description

Technical Field

[0001] This invention belongs to the field of control system technology, and specifically relates to a rapid switching device for chlorination furnaces used in chlorination production lines. Background Technology

[0002] During normal operation of the chlorination production system, each production line's chlorination furnace is configured with one furnace in use and one on standby. For the current two chlorination production lines, the chlorination furnaces are operated in a "two in use, two on standby" mode. The standby chlorination furnaces are often kept for six months to a year or more, and having two standby chlorination furnaces would result in a significant waste of existing resources.

[0003] How to expand new production lines without building new chlorination furnaces, achieve "three uses and one standby" for chlorination furnaces, reduce the investment cost of expanding new production lines while meeting production and maintenance needs, and maximize the utilization of chlorination furnace equipment has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a rapid switching device for chlorination furnaces in a chlorination production line, which enables rapid switching of signals from the original equipment between two control systems, thereby improving the utilization rate of existing equipment.

[0005] The present invention adopts the following technical solution:

[0006] A rapid switching device for chlorination furnaces in a chlorination production line is used for rapid switching control of chlorination furnaces in at least two chlorination production lines. Each of the chlorination production lines is configured with two chlorination furnaces, one for use and one for standby, and each chlorination production line is equipped with its own DCS control system.

[0007] The chlorination furnace rapid switching device includes a standard cabinet integrating various control components, including circuit breakers, terminal blocks, 24V relays, 24V switching power supplies, redundant modules, and transfer switches.

[0008] The circuit breaker is used for the on / off control of the 220V input power supply of the 24V switching power supply.

[0009] The terminal block includes a positive terminal block and a negative terminal block, and multiple 24V relays are connected in parallel between the positive terminal block and the negative terminal block;

[0010] The 24V relays are used to transfer the measurement signals of each of the chlorination furnaces. The measurement signals of each chlorination furnace are transferred through the normally open / normally closed contacts of two paired 24V relays. Each 24V relay has at least one common signal input contact and two output contacts, one of which is normally open and the other is normally closed. The signal lines of each field instrument of each chlorination furnace are connected one-to-one with the signal input contacts of the paired 24V relays. The normally open contact of each 24V relay is connected to one set of DCS control system, and the normally closed contact is connected to another set of DCS control system. The connection order of the normally open and normally closed contacts of the paired 24V relays to the two corresponding DCS control systems is reversed, so that the energized and de-energized states of the coils of the corresponding two 24V relays are opposite.

[0011] The 24V switching power supply converts the 220V input power supply into a 24V output power supply to power the chlorination furnace rapid switching device.

[0012] The redundant module is used to switch between the two 24V switching power supplies.

[0013] The changeover switch is used to switch the coils of two paired 24V relays between energization and de-energization.

[0014] The redundant module, transfer switch, positive terminal block, 24V relay, and negative terminal block are connected in series to form two fast-switching circuits. In one of these circuits, when one is energized, the other is de-energized, controlling the energization and de-energization of the paired 24V relays. Preferably, each fast-switching circuit includes a fuse connected in series between the corresponding positive terminal block and the 24V relay. By incorporating a fuse, this invention reduces the maintenance difficulty of the entire system during production.

[0015] Preferably, the transfer switch is a redundant switch with an indicator light. Through redundancy configuration, circuit problems in a single circuit can be avoided, thereby improving the fault tolerance of the entire system.

[0016] Preferably, each of the fast switching loops is equipped with a self-test module to perform loop detection and send fault information. This prevents various production anomalies caused by line problems during normal production and promptly informs on-duty personnel to troubleshoot system abnormalities through daily inspections.

[0017] This invention also includes other equipment or components that enable the rapid switching device for a chlorination furnace used in a chlorination production line to operate normally. These devices or components all employ conventional techniques in the art. Furthermore, devices and components not limited in this invention all employ conventional techniques in the art. For example, the DCS control system, circuit breakers, positive terminal blocks, negative terminal blocks, 24V relays, 24V switching power supplies, redundant modules, transfer switches, redundant switches with indicator lights, fuses, etc., used in this invention are products well-known to those skilled in the art, and their specific models and parameters can be selected by those skilled in the art based on common knowledge and actual needs.

[0018] The working principle of this invention is that it enables the device to transmit signals into different control system loops, thereby achieving device integration with different systems. The 24V relay in this invention adopts an alternating power supply mode, which can reduce the heat generation of the 24V relay and the load on the 24V switching power supply during normal production, while also reducing the impact generated during switching. This invention uses a unique wiring method that allows the device signals to be completely introduced into the corresponding control system, enabling the expansion of the control system on the original equipment of the production system.

[0019] The beneficial effects of this invention are:

[0020] 1) It can expand the control system on the existing equipment of the production system;

[0021] 2) By adopting a cross power supply mode inside the switching device in this invention, the load on the entire system can be reduced;

[0022] 3) By setting up redundant modules, redundant switches, and self-test modules, the fault tolerance of the system during normal production can be improved;

[0023] 4) This invention is not limited to chlorination process production, but is also applicable to production systems in other industries that meet this requirement, and has great compatibility with other production systems;

[0024] 5) This invention can maximize the utilization rate of chlorination furnace equipment in chlorination production, expand the chlorination production line, and enable signal switching between different systems, reducing losses in manpower and financial resources. Attached Figure Description

[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0026] Figure 1 This is a structural diagram of the layout of various control components on the front of the standard cabinet of the present invention in an embodiment.

[0027] Figure 2 This is a structural diagram of the layout of various control components on the back of the standard cabinet of the present invention in an embodiment.

[0028] Figure 3 This is a schematic diagram of the control logic as part of the present invention in the embodiment.

[0029] Figure 4 This is a schematic diagram of the control logic of another part of the present invention in the embodiment. Detailed Implementation

[0030] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely illustrative and is not intended to limit the scope of the invention. Any modifications, equivalent substitutions, or improvements made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the scope of protection of the present invention.

[0031] Example

[0032] Please refer to Figures 1-4 This invention provides a rapid switching device for chlorination furnaces in a chlorination production line, used for rapid switching control of chlorination furnaces in two chlorination production lines. Each chlorination production line is configured with two chlorination furnaces, one for use and one for standby. The DCS control systems of the two chlorination production lines are defined as DCS control system 1 and DCS control system 2.

[0033] The chlorination furnace rapid switching device includes a standard cabinet 1 integrating various control components, including a circuit breaker 2, a terminal block, a 24V relay 7, a 24V switching power supply 3, a redundant module 4, and a changeover switch 8.

[0034] The circuit breaker 2 is used for the on / off control of the 220V power supply connected to the 24V switching power supply 3.

[0035] The terminal block includes a positive terminal block 5 and a negative terminal block 6, and 240 24V relays 7 are connected in parallel between the positive terminal block 5 and the negative terminal block 6.

[0036] The 24V relay 7 is used to transfer the measurement signals of each of the chlorination furnaces. The measurement signals of each chlorination furnace are transferred through the normally open / normally closed contacts of the two 24V relays 7 arranged in pairs. Each 24V relay 7 has a common signal input contact and two output contacts, one of which is normally open and the other is normally closed. The field instrument signal lines of the two chlorination furnaces on the two production lines are connected one-to-one with the signal input contacts of the two 24V relays 7 arranged in pairs. In the two 24V relays 7 arranged in pairs, the normally open contact of one 24V relay 7 is connected to the 1#DCS control system and the normally closed contact is connected to the 2#DCS control system. The normally open contact of the other 24V relay 7 is connected to the 2#DCS control system and the normally closed contact is connected to the 1#DCS control system, so that the energized and de-energized states of the coils of the corresponding two 24V relays 7 are opposite.

[0037] The 24V switching power supply 3 converts the 220V input power supply into a 24V output power supply to power the chlorination furnace rapid switching device.

[0038] The redundant module 4 is used to switch between the two sets of 24V switching power supplies 3.

[0039] The changeover switch 8 is used to switch the coils of the two paired 24V relays 7 between energization and de-energization.

[0040] The redundant module 4, the changeover switch 8, the positive terminal block 5, the 24V relay 7, and the negative terminal block 6 are connected in series to form two fast switching circuits. When one of the two fast switching circuits is in the energized state, the other is in the de-energized state, which is used to control the energization and de-energization of the two 24V relays 7 that are set in pairs.

[0041] As a further improvement to the above embodiments, each of the fast switching circuits is equipped with a fuse 9, which is connected in series between the corresponding positive terminal block 5 and the 24V relay 7. By incorporating the fuse 9, this invention reduces the maintenance difficulty of the entire system during production.

[0042] As a further improvement to the above embodiments, the changeover switch 8 is a redundant switch with an indicator light. Through redundant configuration, line problems in a single circuit can be avoided, thereby improving the fault tolerance of the entire system.

[0043] As a further improvement to the above embodiments, each of the fast switching loops is equipped with a self-test module (not shown in the figure) to implement loop detection and send fault information. This prevents various production anomalies caused by line problems during normal production, and promptly informs on-duty personnel to troubleshoot system anomalies through daily inspections.

[0044] The working principle of this invention is that it enables the device to transmit signals into different control system loops, thereby achieving device integration with different systems. The 24V relay 7 in this invention adopts an alternating power supply mode, which can reduce the heat generation of the 24V relay 7 and the load on the 24V switching power supply 3 during normal production, while also reducing the impact generated during switching. This invention uses a unique wiring method that allows the device signals to be completely introduced into the corresponding control system, thereby expanding the control system on the original equipment of the production system.

[0045] Application examples

[0046] In practical applications, the above embodiments take the expansion of a third chlorination production line based on two chlorination production lines with four chlorination furnaces ("two in use, two on standby") as an example. When chlorination production line 1 uses chlorination furnace #1 for production, the newly added chlorination production line 2 uses chlorination furnace #2, and chlorination production line 3 uses chlorination furnace #4. At this time, chlorination furnace #3 has been repaired and is in standby mode. Suppose that line 1 needs to switch furnaces due to equipment problems. In this case, the DCS control system of chlorination production line 2 can be switched to chlorination furnace #3 for ignition, and the control of chlorination furnace #2 can be switched back to chlorination production line 1 for normal production. At the same time, chlorination production line 3 can also resume normal production. In this way, chlorination furnace #1 can be emptied and repaired immediately. This invention achieves rapid handling of abnormal production situations without using any human or material resources. When there are enough production lines, if N production lines are operating simultaneously, only (N-1) sets of this switching device are needed to meet the production requirements of "(N+1) in use, 1 on standby". The standby chlorination furnace can switch and maintain production at any time to deal with various sudden abnormal situations.

[0047] The embodiments of the present invention have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A rapid switching device for chlorination furnaces in a chlorination production line, used for rapid switching control of chlorination furnaces in at least two chlorination production lines, each of the chlorination production lines having two chlorination furnaces configured with one in use and one on standby, and each chlorination production line having its own DCS control system, characterized in that: The chlorination furnace rapid switching device includes a standard cabinet integrating various control components, including circuit breakers, terminal blocks, 24V relays, 24V switching power supplies, redundant modules, and transfer switches. The circuit breaker is used for the on / off control of the 220V input power supply of the 24V switching power supply. The terminal block includes a positive terminal block and a negative terminal block, and multiple 24V relays are connected in parallel between the positive terminal block and the negative terminal block; The 24V relays are used to transfer the measurement signals of each of the chlorination furnaces. The measurement signals of each chlorination furnace are transferred through the normally open / normally closed contacts of two paired 24V relays. Each 24V relay has at least one common signal input contact and two output contacts, one of which is normally open and the other is normally closed. The signal lines of each field instrument of each chlorination furnace are connected one-to-one with the signal input contacts of the paired 24V relays. The normally open contact of each 24V relay is connected to one set of DCS control system, and the normally closed contact is connected to another set of DCS control system. The connection order of the normally open and normally closed contacts of the paired 24V relays to the two corresponding DCS control systems is reversed, so that the energized and de-energized states of the coils of the corresponding two 24V relays are opposite. The 24V switching power supply converts the 220V input power supply into a 24V output power supply to power the chlorination furnace rapid switching device. The redundant module is used to switch between the two 24V switching power supplies. The changeover switch is used to switch the coils of two paired 24V relays between energization and de-energization. The redundant module, transfer switch, positive terminal block, 24V relay, and negative terminal block are connected in series to form two fast switching circuits. In the two fast switching circuits, when one is in the energized state, the other is in the de-energized state, which is used to control the energization and de-energization of the two 24V relays that are set in pairs.

2. The rapid switching device for chlorination furnaces applied in a chlorination production line according to claim 1, characterized in that: Each of the aforementioned fast switching circuits is equipped with a fuse, which is connected in series between the corresponding positive terminal block and the 24V relay.

3. The rapid switching device for chlorination furnaces applied in a chlorination production line according to claim 1, characterized in that: The changeover switch is a redundant switch with an indicator light.

4. The rapid switching device for chlorination furnaces applied in a chlorination production line according to any one of claims 1 to 3, characterized in that: Each of the aforementioned fast switching loops is equipped with a self-test module, which is used to implement loop detection function and send fault information.

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