Cement plant clinker line denitration treatment low-voltage power supply and distribution system

Abstract

The utility model relates to the technical field of power distribution, in particular to a cement plant clinker line denitration treatment low-voltage power supply and distribution system which comprises a dry-type transformer and a low-voltage switch cabinet. A plurality of power supply branches connected in parallel are arranged in the low-voltage switch cabinet, and the plurality of power supply branches are used for supplying power to corresponding equipment; branch switches are arranged on the plurality of power supply branches; the input end of the dry-type transformer is connected with an external alternating current power supply, and the output end of the dry-type transformer is connected into the low-voltage switch cabinet; the output end of the dry-type transformer comprises a zero line and a live line; the live wire is also provided with a protection branch and a compensation branch. A multi-source parallel power supply mode is adopted, that is, different power sources are supplied to users in a balanced manner through a plurality of transformers and a power distribution cabinet, and the power supply types are diversified. The parallel connection mode is very important in the aspects of improving power supply reliability and realizing standby power supply switching. When one piece of equipment breaks down or needs to be maintained, other pieces of equipment can still continue to supply power, and therefore power failure is effectively avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of power distribution, in particular to a low-voltage power supply and distribution system for denitrification treatment of the clinker line in a cement plant. Background Art

[0002] Energy conservation and environmental protection have become important considerations in the design and operation of the medium and low-voltage power supply and distribution system in a cement plant. In order to reduce energy consumption and minimize the negative impact on the environment, a series of energy conservation and environmental protection measures have been taken in the power supply and distribution system of the cement plant.

[0003] The medium and low-voltage power supply and distribution system generally refers to a power system with a voltage level below 1000V. Compared with the high-voltage power transmission system, the low-voltage system has higher safety and lower operation and maintenance costs. However, the existing power distribution equipment has fewer types of power supply terminals, which cannot meet the usage requirements of various equipment. At the same time, all equipment is prone to power outages during faults. Content of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a low-voltage power supply and distribution system for denitrification treatment of the clinker line in a cement plant, so as to solve the problems of single type of power supply terminals of the existing power distribution equipment and easy power outages caused by faults.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A low-voltage power supply and distribution system for denitrification treatment of the clinker line in a cement plant of the utility model includes a dry-type transformer and a low-voltage switch cabinet;

[0007] A plurality of parallel power supply branches are arranged in the low-voltage switch cabinet, and the plurality of power supply branches are used to supply power to corresponding equipment; branch switches are arranged on the plurality of power supply branches;

[0008] The input end of the dry-type transformer is connected to an external AC power supply, and the output end of the dry-type transformer is connected to the inside of the low-voltage switch cabinet;

[0009] The output end of the dry-type transformer includes a neutral line and a live line. One end of the power supply branch is connected to the live line, the other end of the power supply branch is connected to the neutral line, and the other end of the power supply branch is also connected to the ground wire inside the low-voltage switch cabinet;

[0010] A protection branch and a compensation branch are also arranged on the live line.

[0011] In an embodiment of the present application, the protection branch includes a fuse and a surge protector, and the fuse and the surge protector are connected in series to form the protection branch. One end of the protection branch is connected to the live line, and the other end of the protection branch is grounded.

[0012] In an embodiment of the present application, the compensation branch includes a plurality of compensation capacitors. The plurality of compensation capacitors are connected in parallel and then connected to the live wire, and a control switch is provided between the plurality of compensation capacitors and the live wire.

[0013] In an embodiment of the present application, a main switch is provided on the live wire, and a protection branch is provided between the main switch and the compensation branch, and a protection branch is also provided between the compensation branch and the control switch.

[0014] In an embodiment of the present application, current transformers are provided on one side of the main switch, between the compensation branch and the control switch.

[0015] In an embodiment of the present application, among the plurality of power supply branches, there is a first target power supply branch for supplying power to a heater control cabinet or an air compressor control cabinet, and a current transformer is provided on the first target power supply branch.

[0016] In an embodiment of the present application, among the plurality of power supply branches, there is a second target power supply branch for supplying power to a motor or a water pump, and an inverter is provided on the second target power supply branch.

[0017] The beneficial effects of the present utility model are as follows: A low-voltage power supply and distribution system for denitrification treatment of clinker production lines in cement plants of the present utility model includes a dry-type transformer and a low-voltage switchgear cabinet. The low-voltage switchgear cabinet is provided with a plurality of parallel power supply branches for supplying power to corresponding equipment; branch switches are provided on the plurality of power supply branches; the input end of the dry-type transformer is connected to an external AC power supply, and the output end of the dry-type transformer is connected to the inside of the low-voltage switchgear cabinet; the output end of the dry-type transformer includes a neutral wire and a live wire. One end of the power supply branch is connected to the live wire, the other end of the power supply branch is connected to the neutral wire, and the other end of the power supply branch is also connected to the ground wire inside the low-voltage switchgear cabinet; a protection branch and a compensation branch are also provided on the live wire. The multi-source parallel power supply method is adopted, that is, different power sources are evenly supplied to users through multiple transformers and distribution cabinets, and the types of power supply are diversified. This parallel method is very important for improving power supply reliability and realizing standby power source switching. When a device fails or needs to be repaired, other devices can still continue to be powered, thus effectively avoiding power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments:

[0019] Figure 1 It is a structural schematic diagram when a low-voltage power supply and distribution system for denitrification treatment of clinker production lines in cement plants in an embodiment of the present utility model is fully unfolded;

[0020] 1 - Dry-type transformer, 2 - Fuse, 3 - Surge protector, 4 - Compensation capacitor, 5 - Control switch, 6 - Main switch, 7 - Current transformer, 8 - Frequency converter. Specific embodiments

[0021] The following uses specific examples to illustrate the embodiments of the present invention. Those skilled in the art can easily understand the other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0022] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the layers related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the layers during actual implementation. The type, quantity, and ratio of each layer during actual implementation can be arbitrarily changed, and the layer layout type may also be more complex.

[0023] In the following description, a large number of details are discussed to provide a more thorough explanation of the embodiments of the present invention. However, it is obvious to those skilled in the art that the embodiments of the present invention can be implemented without these specific details.

[0024] As Figure 1 shown, it includes a dry-type transformer 1 and a low-voltage switchgear cabinet; multiple parallel power supply branches are provided in the low-voltage switchgear cabinet, and the multiple power supply branches are used to supply power to the corresponding devices; branch switches are provided on the multiple power supply branches; the input end of the dry-type transformer 1 is connected to an external AC power supply, and the output end of the dry-type transformer 1 is connected to the inside of the low-voltage switchgear cabinet; the output end of the dry-type transformer 1 includes a neutral line 10 and a live wire 9. One end of the power supply branch is connected to the live wire 9, the other end of the power supply branch is connected to the neutral line 10, and the other end of the power supply branch is also connected to the ground wire 11 inside the low-voltage switchgear cabinet; a protection branch and a compensation branch are also provided on the live wire 9.

[0025] Specifically, in this application, the power supply branches for supplying power to the following devices are included:

[0026] a. SCR on-site distribution box, b. Air compressor room distribution box, c. Distribution room distribution box, d. DCS power supply, e. Heater control cabinet, f. Air compressor A control cabinet (star-delta start), g. Spare, h. Spare, i. Air compressor C control cabinet, j. Air compressor B control cabinet, k. Pulse dust collector control cabinet, l. SCR ammonia supply pump A, m. SCR ammonia supply pump B.

[0027] The power supply branch for the heater control cabinet, air compressor A control cabinet, air compressor B control cabinet, and air compressor C control cabinet is the first target power supply branch. Among them, a current transformer 7 is provided on the first target power supply branch. The current data on the first target power supply branch can be collected through an external device.

[0028] The power supply branch for supplying power to SCR ammonia supply pump A and SCR ammonia supply pump B is the second power supply branch. Among them, an inverter is provided on the second power supply branch to provide a frequency conversion function.

[0029] The protection branch includes a fuse 2 and a surge protector 3. The fuse 2 and the surge protector 3 are connected in series to form a protection branch. One end of the protection branch is connected to the live wire 9, and the other end of the protection branch is grounded.

[0030] The compensation branch includes a plurality of compensation capacitors 4. The plurality of compensation capacitors 4 are connected in parallel and then connected to the live wire 9. A control switch 5 is provided between the plurality of compensation capacitors 4 and the live wire 9.

[0031] A main switch 6 is provided on the live wire 9. A protection branch is provided between the main switch 6 and the compensation branch, and a protection branch is provided between the compensation branch and the control switch 5.

[0032] Current transformers 7 are provided on one side of the main switch 6 and between the compensation branch and the control switch 5. The current data at the corresponding positions can be collected through an external device.

[0033] The principle and beneficial effects of this application are as follows:

[0034] In medium and low voltage power supply and distribution systems in electricity, a multi-source parallel power supply method is often adopted, that is, different power sources are evenly supplied to users through multiple transformers and distribution cabinets. This parallel method is very important for improving power supply reliability and realizing standby power source switching. When one device fails or needs to be repaired, other devices can still continue to supply power, thus effectively avoiding power outages.

[0035] Medium and low voltage power supply and distribution systems in electricity are usually equipped with arc protection devices to prevent electrical fires caused by fault arcs. The arc protection device can quickly cut off the current when there is a circuit fault or improper switch operation, effectively protecting the safety of equipment and personnel.

[0036] Medium and low voltage power supply and distribution systems in electricity should be equipped with a complete protection and monitoring system to ensure the safe operation of power equipment and electrical equipment. This includes functions such as overload protection, short circuit protection, grounding protection, and leakage protection, as well as functions for power metering, energy consumption statistics, and remote monitoring. Such a protection and monitoring system can detect and handle faults in a timely manner, improving the stability and safety of the power supply system.

[0037] To meet the requirements of energy conservation, emission reduction and sustainable development, the medium and low voltage power supply and distribution system in the electrical field can also achieve efficient energy utilization and intelligent control by accessing renewable energy. By adopting energy-saving equipment such as high-efficiency transformers and energy recovery devices, combined with intelligent control technology and data monitoring and analysis, it is possible to optimize the management of electrical loads, improve energy utilization efficiency and reduce energy consumption.

[0038] Cement plants can use this application to replace old equipment, such as high-efficiency frequency converters and high-efficiency motors. These devices have high efficiency and can reduce energy losses and improve the energy efficiency of the power supply and distribution system.

[0039] Cement plants should reasonably organize and adjust the load according to the actual production situation and power consumption requirements. By formulating a reasonable load distribution plan, over-power supply during low-load periods can be avoided, and ineffective energy consumption can be reduced. At the same time, by using intelligent monitoring and dispatching systems, intelligent management of cargo distribution and electrical loads can be carried out to improve the flexibility of power supply and distribution and energy utilization efficiency.

[0040] The medium and low voltage power supply and distribution system in the cement plant can access renewable energy and actively promote the utilization of renewable energy. For example, solar photovoltaic panels or wind power generation devices can be used to provide part of the energy demand for the power supply and distribution system, reduce dependence on traditional energy, and reduce environmental pollution.

[0041] In the above embodiments, although the present utility model has been described in conjunction with specific embodiments of the present utility model, many substitutions, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art based on the foregoing description. The embodiments of the present utility model are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims.

[0042] The above embodiments are only illustrative of the principles and effects of the present utility model and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. A low-voltage power supply and distribution system for denitrification treatment of a clinker line in a cement plant, characterized in that, It includes a dry-type transformer (1) and a low-voltage switchgear cabinet; Multiple parallel power supply branches are provided inside the low-voltage switchgear cabinet, and the multiple power supply branches are used to supply power to corresponding devices; branch switches are provided on the multiple power supply branches; The input end of the dry-type transformer (1) is connected to an external AC power supply, and the output end of the dry-type transformer (1) is connected inside the low-voltage switchgear cabinet; The output end of the dry-type transformer (1) includes a neutral line (10) and a live line (9). One end of the power supply branch is connected to the live line (9), the other end of the power supply branch is connected to the neutral line (10), and the other end of the power supply branch is also connected to the ground wire (11) inside the low-voltage switchgear cabinet; A protection branch and a compensation branch are also provided on the live line (9).

2. A low-voltage power supply and distribution system for denitrification treatment of a clinker production line in a cement plant according to claim 1, characterized in that, The protection branch includes a fuse (2) and a surge protector (3). The fuse (2) and the surge protector (3) are connected in series to form the protection branch. One end of the protection branch is connected to the live line (9), and the other end of the protection branch is grounded.

3. A low-voltage power supply and distribution system for denitrification treatment of a clinker line in a cement plant according to claim 1, characterized in that, The compensation branch includes multiple compensation capacitors (4). The multiple compensation capacitors (4) are connected in parallel and then connected to the live line (9). A control switch (5) is provided between the multiple compensation capacitors (4) and the live line (9).

4. A low-voltage power supply and distribution system for denitrification treatment of a clinker line in a cement plant according to claim 3, characterized in that, A main switch (6) is provided on the live line (9). The protection branch is provided between the main switch (6) and the compensation branch, and the protection branch is also provided between the compensation branch and the control switch (5).

5. A low-voltage power supply and distribution system for denitrification treatment of a clinker production line in a cement plant according to claim 4, characterized in that, Current transformers (7) are provided on one side of the main switch (6) and between the compensation branch and the control switch (5).

6. A low-voltage power supply and distribution system for denitrification treatment of a clinker production line in a cement plant according to claim 1, characterized in that, Among the multiple power supply branches, there is a first target power supply branch for supplying power to a heater control cabinet or an air compressor control cabinet, and a current transformer (7) is provided on the first target power supply branch.

7. A low-voltage power supply and distribution system for denitrification treatment of a clinker line in a cement plant according to claim 1, characterized in that, Among the multiple power supply branches, there is a second target power supply branch for supplying power to a motor or a water pump, and an inverter (8) is provided on the second target power supply branch.

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