Combined vacuum energy-saving device

Abstract

The utility model discloses a combined type vacuum energy-saving device. The low-pressure vacuum pipe is communicated with an upper net part of the paper machine through a pipeline; the low-pressure vacuum fans are connected with the low-pressure vacuum pipe through pipelines and are used for vacuumizing the net part; the couch roll vacuum pump is communicated with a couch roll of the paper machine through a pipeline and is used for vacuumizing the couch roll of the paper machine; the press roll vacuum pump is communicated with a press roll of the paper machine through a pipeline and is used for vacuumizing the press roll of the paper machine; and the net part vacuum pump is connected with a net part of the paper machine through a pipeline and is used for vacuumizing the net part. The combined vacuum device is formed by the low-pressure vacuum fan, the vacuum pump and the turbine fan, the low-pressure vacuum fan, the vacuum pump and the turbine fan are selected to be combined for use according to quantitative change, difference of air permeability of paper and difference of vacuum consumption, total vacuum consumption is reduced, timely adjustment after quantitative change is facilitated, energy consumption is reduced, and production efficiency is improved. The cost is saved.

Description

Technical Field

[0001] The utility model relates to a vacuum system of a paper machine, in particular to a combined vacuum energy-saving device. Background Technique

[0002] The vacuum system is one of the basic component systems of a paper production line, and can provide the vacuum degree required by the process for components such as a paper machine in the paper production line.

[0003] The main energy consumption of the entire vacuum system is electricity consumption. The vacuum pump is generally driven by a high-power motor, so the electricity consumption of the vacuum pump is often large. According to different working methods, vacuum pumps can generally be divided into water ring vacuum pumps, Roots vacuum pumps, turbine vacuum pumps, etc. Among them, the water ring vacuum pump is the simplest and most practical and has the most stable technology among vacuum pumps. Most paper production lines use water ring vacuum pumps. The working principle of the water ring vacuum pump is: water is supplied to the water ring vacuum pump through a water inlet pump, and a sealed water ring formed inside the water ring vacuum pump generates negative pressure vacuum, so as to provide vacuum degree for external components.

[0004] However, when the existing vacuum system works, multiple vacuum pumps are usually used to evacuate the entire vacuum system. Since all the vacuum pumps are turned on during operation, it consumes huge electric energy, and the total vacuum consumption is high. However, due to changes in the basis weight and the air permeability of the paper, etc., the required vacuum consumption is different. Using all vacuum pumps to conduct high-pressure evacuation of the entire vacuum system leads to problems such as evacuation phenomenon, pipeline vibration phenomenon, high overall energy consumption and high cost. For this reason, a combined vacuum energy-saving device is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to propose a combined vacuum energy-saving device to solve the above problems.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A combined vacuum energy-saving device, which is characterized in that it includes a low vacuum pipe communicated with the forming section of the paper machine through a pipeline, several low-pressure vacuum fans connected to the low vacuum pipe through a pipeline and used for evacuating the forming section, a couch roll vacuum pump communicated with the couch roll of the paper machine through a pipeline and used for evacuating the couch roll of the paper machine, a press roll vacuum pump communicated with the press roll of the paper machine through a pipeline and used for evacuating the press roll of the paper machine, and a forming section vacuum pump connected to the forming section of the paper machine through a pipeline and used for evacuating the forming section.

[0007] Further preferably, it further includes a standby vacuum pump connected to the couch roll vacuum pump, the press roll vacuum pump and the forming section vacuum pump.

[0008] Further preferably, it further includes a vacuum water seal water pump connected to the couch roll vacuum pump, the press roll vacuum pump, the forming section vacuum pump and the standby vacuum pump.

[0009] Further preferably, a steam-water separator is connected to the pipeline connecting the couch roll vacuum pump to the couch roll of the paper machine, the pipeline connecting the press roll vacuum pump to the press roll of the paper machine, and the pipeline connecting the forming section vacuum pump to the forming section of the paper machine.

[0010] Further preferably, it further includes a turbo blower connected to the forming section of the paper machine through a pipeline, and a steam-water separator is also connected to the pipeline connecting the turbo blower to the forming section of the paper machine.

[0011] Further preferably, the turbo blower is also connected to the press roll of the paper machine through a pipeline, and a steam-water separator is also connected to the pipeline connecting the turbo blower to the press roll of the paper machine.

[0012] The beneficial effects of the present utility model: A combined vacuum device is formed by using a low-pressure vacuum blower, a vacuum pump, and a turbo blower. According to the differences in basis weight change, paper air permeability, and vacuum consumption, the low-pressure vacuum blower, the vacuum pump, and the turbo blower are selected and used in combination. When the vacuum consumption is low, the low-pressure vacuum blower is used to evacuate, and when the vacuum is high, the vacuum pump is used to evacuate, avoiding the problem of excessive vacuum or pipeline vibration caused by using the vacuum pump when the vacuum consumption is low, making the vacuum distribution more reasonable. At the same time, when the required vacuum degree is not too high, the suction volume of the turbo blower is reduced, ensuring that the turbo blower can increase the vacuum degree, thereby reducing the total vacuum consumption, facilitating timely adjustment after the basis weight change, reducing energy consumption, and saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Att Figure 1 is a schematic structural diagram of the present utility model.

[0014] Legend: 1, low-vacuum pipe; 2, low-pressure vacuum blower; 3, couch roll vacuum pump; 4, press roll vacuum pump; 5, forming section vacuum pump; 6, standby vacuum pump; 7, vacuum water seal water pump; 8, steam-water separator; 9, turbo blower. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, we will further explain a combined vacuum energy-saving device of the present utility model with reference to the accompanying drawings.

[0016] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If this specific posture changes, the directional indications will also change accordingly.

[0017] In the present utility model, unless otherwise clearly defined and limited, terms such as "connection" and "fixation" shall be understood in a broad sense; for example, "fixation" can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0018] Referring to Figure 1 As shown in , a combined vacuum energy-saving device, which is characterized by comprising a low-vacuum pipe 1 communicated with the forming section of a paper machine through a pipeline, several low-pressure vacuum fans 2 connected with the low-vacuum pipe 1 through a pipeline and used for evacuating the forming section, a couch roll vacuum pump 3 communicated with the couch roll of the paper machine through a pipeline and used for evacuating the couch roll, a press roll vacuum pump 4 communicated with the press roll of the paper machine through a pipeline and used for evacuating the press roll, and a forming section vacuum pump 5 connected with the forming section of the paper machine through a pipeline and used for evacuating the forming section.

[0019] A combined vacuum device is formed by using the low-pressure vacuum fans 2, vacuum pumps and a turbine blower 9. According to the differences in basis weight change, paper air permeability and vacuum consumption, the low-pressure vacuum fans 2, vacuum pumps and the turbine blower 9 are selected for combined use. When the vacuum consumption is low, the low-pressure vacuum fans 2 are used for evacuation, and when the vacuum is high, the vacuum pumps are used for evacuation, so as to avoid the problems of excessive vacuum degree, evacuation or pipeline vibration caused by using vacuum pumps when the vacuum consumption is low, make the vacuum degree distribution more reasonable, and at the same time, when the required vacuum degree is not too high, the suction volume of the turbine blower 9 is reduced, ensuring that the turbine blower 9 can increase the vacuum degree, thereby reducing the total vacuum consumption, facilitating timely adjustment after the basis weight change, reducing energy consumption and saving costs.

[0020] In one embodiment, it further comprises a standby vacuum pump 6 connected with the couch roll vacuum pump 3, the press roll vacuum pump 4 and the forming section vacuum pump 5; through the arrangement of the standby vacuum pump 6, when the couch roll vacuum pump 3, the press roll vacuum pump 4 and the forming section vacuum pump 5 malfunction during use and cannot work properly, the standby vacuum pump 6 is used instead, and the faulty vacuum pump waits for the staff to maintain, so as to avoid the production shutdown of the entire paper machine for maintenance due to the malfunction of a certain vacuum pump during use.

[0021] In one embodiment, it further comprises a vacuum water seal water pump 7 connected with the couch roll vacuum pump 3, the press roll vacuum pump 4, the forming section vacuum pump 5 and the standby vacuum pump 6; through the arrangement of the vacuum water seal water pump 7, it supplies water to the couch roll vacuum pump 3, the press roll vacuum pump 4, the forming section vacuum pump 5 and the standby vacuum pump 6.

[0022] In one embodiment, a steam-water separator 8 is connected to the pipeline connecting the couch roll vacuum pump 3 to the couch roll of the paper machine, the pipeline connecting the press roll vacuum pump 4 to the press roll of the paper machine, and the pipeline connecting the forming section vacuum pump 5 to the forming section of the paper machine; the steam-water separator 8 is used to separate the water vapor extracted by vacuum pumping into steam and water.

[0023] In one embodiment, it further includes a turbo blower 9 connected to the forming section of the paper machine through a pipeline, and a steam-water separator 8 is also connected to the pipeline connecting the turbo blower 9 to the forming section of the paper machine.

[0024] In one embodiment, the turbo blower 9 is further connected to the press roll of the paper machine through a pipeline, and a steam-water separator 8 is also connected to the pipeline connecting the turbo blower 9 to the press roll of the paper machine.

[0025] During the use process of the present utility model, when only a low vacuum consumption is required when the forming section of the paper machine is under vacuum pumping, the low-pressure vacuum blower 2 is started, and the forming section of the paper machine is evacuated through the low-pressure vacuum blower 2, while the couch roll and press roll of the paper machine are evacuated with a high vacuum degree through the couch roll vacuum pump 3 and the press roll vacuum section.

[0026] When the vacuum consumption of the forming section of the paper machine is high due to reasons such as changes in basis weight and the vacuum degree is extremely high, the forming section of the paper machine is evacuated through the forming section vacuum pump 5; different vacuum consumptions are adopted at different stages according to different vacuum degree requirements, saving energy consumption and cost.

[0027] The protection scope of the present utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of this embodiment all fall within the protection scope of the present utility model.

Claims

1. A combined vacuum energy-saving device, characterized in that It includes a low vacuum pipe (1) connected to the forming section of a paper machine through a pipeline, several low-pressure vacuum blowers (2) connected to the low vacuum pipe (1) through a pipeline for evacuating the forming section, a couch roll vacuum pump (3) connected to the couch roll of the paper machine through a pipeline for evacuating the couch roll, a press roll vacuum pump (4) connected to the press roll of the paper machine through a pipeline for evacuating the press roll, and a forming section vacuum pump (5) connected to the forming section of the paper machine through a pipeline for evacuating the forming section.

2. The combined vacuum energy-saving device according to claim 1, wherein: It further includes a standby vacuum pump (6) connected to the couch roll vacuum pump (3), the press roll vacuum pump (4), and the forming section vacuum pump (5).

3. The combined vacuum energy-saving device according to claim 2, characterized in that: It further includes a vacuum water seal water pump (7) connected to the couch roll vacuum pump (3), the press roll vacuum pump (4), the forming section vacuum pump (5), and the standby vacuum pump (6).

4. A combined vacuum energy-saving device according to claim 1, characterized in that: A steam-water separator (8) is connected to the pipeline connecting the couch roll vacuum pump (3) to the couch roll of the paper machine, the pipeline connecting the press roll vacuum pump (4) to the press roll of the paper machine, and the pipeline connecting the forming section vacuum pump (5) to the forming section of the paper machine.

5. The combined vacuum energy-saving device according to claim 1, wherein: It further includes a turbo blower (9) connected to the forming section of the paper machine through a pipeline, and a steam-water separator (8) is also connected to the pipeline connecting the turbo blower (9) to the forming section of the paper machine.

6. The combined vacuum energy-saving device according to claim 5, wherein: The turbo blower (9) is further connected to the press roll of the paper machine through a pipeline, and a steam-water separator (8) is also connected to the pipeline connecting the turbo blower (9) to the press roll of the paper machine.

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