阅读说明：本技术 一种碟式离心机防爆系统 (Explosion-proof system of disc centrifuge ) 是由 杨山岗 李邦 赵奇峰 刘广明 潘晶晶 王金林 于 2020-11-24 设计创作，主要内容包括：本发明涉及一种碟式离心机防爆系统,主要由充氮模块、分离密封模块和微压检测模块组成,所述分离密封模块包括全密闭的碟式离心机、冷却装置、第一水封装置和第二水封装置,所述充氮模块设于碟式离心机的顶部,所述充氮模块包括氮气吹扫装置和氮气保压装置,所述微压检测模块用于检测防爆系统内的氮气压力,并且所述微压检测模块设于碟式离心机的排渣口上部。本发明的优点是采用气体微压表对运行过程中的碟式离心机内腔的氮气压力进行在线监测,并通过电磁阀对输入离心机内腔的氮气实行定量控制,以保证整个系统在氮气微正压下运行,提高了防爆的可靠性。(The invention relates to an explosion-proof system of a disk centrifuge, which mainly comprises a nitrogen filling module, a separation sealing module and a micro-pressure detection module, wherein the separation sealing module comprises a fully-closed disk centrifuge, a cooling device, a first water sealing device and a second water sealing device, the nitrogen filling module is arranged at the top of the disk centrifuge, the nitrogen filling module comprises a nitrogen purging device and a nitrogen pressure maintaining device, the micro-pressure detection module is used for detecting the nitrogen pressure in the explosion-proof system, and the micro-pressure detection module is arranged at the upper part of a slag discharge port of the disk centrifuge. The invention has the advantages that the nitrogen pressure in the inner cavity of the disc centrifuge in the operation process is monitored on line by adopting the gas micro-pressure meter, and the quantitative control is carried out on the nitrogen input into the inner cavity of the centrifuge by the electromagnetic valve, so that the whole system is ensured to operate under the nitrogen micro-positive pressure, and the reliability of explosion prevention is improved.)

1. An explosion-proof system of disk centrifuge which characterized in that: the device mainly comprises a nitrogen filling module, a separation sealing module and a micro-pressure detection module, wherein the separation sealing module comprises a fully-closed disc centrifuge, a cooling device, a first water seal device and a second water seal device, the nitrogen filling module is arranged at the top of the disc centrifuge, the nitrogen filling module comprises a nitrogen purging device and a nitrogen pressure maintaining device, the micro-pressure detection module is used for detecting the nitrogen pressure in an explosion-proof system, and the micro-pressure detection module is arranged at the upper part of a slag discharge port of the disc centrifuge.

2. The explosion-proof system of a disk centrifuge as recited in claim 1, wherein: the top of the disc centrifuge is provided with a nitrogen inlet which is connected with a nitrogen inlet pipe; and the upper part of the slag discharge port of the disc centrifuge is provided with a nitrogen outlet which is connected with a nitrogen outlet pipe.

3. The explosion-proof system of a disk centrifuge as set forth in claim 2, wherein: and the nitrogen gas inlet pipe is provided with a nitrogen purging device and a nitrogen pressure maintaining device which are arranged in parallel.

4. The explosion-proof system of a disk centrifuge as set forth in claim 3, wherein: the nitrogen purging device consists of a nitrogen purging electromagnetic valve and a first gas flowmeter, and the nitrogen pressure maintaining device consists of a nitrogen pressure maintaining electromagnetic valve, a second gas flowmeter and a first gas micro-pressure meter.

5. The explosion-proof system of a disk centrifuge as set forth in claim 4, wherein: the first gas flowmeter, the nitrogen purging electromagnetic valve are sequentially connected in series on a first branch pipe of the nitrogen inlet pipe, the second gas flowmeter, the nitrogen pressure maintaining electromagnetic valve and the first gas micro-pressure meter are sequentially connected in series on a second branch pipe of the nitrogen inlet pipe, and the first branch pipe and the second branch pipe of the nitrogen inlet pipe are connected in parallel.

6. The explosion-proof system of a disk centrifuge as recited in claim 1, wherein: the cooling device comprises an interlayer arranged outside the rotary drum of the disc centrifuge, the lower part of the interlayer is provided with a cooling water inlet, and the upper part of the interlayer is provided with a cooling water outlet.

7. The explosion-proof system of a disk centrifuge as recited in claim 1, wherein: the first water sealing device is arranged at a sewage port of the disc centrifuge, and the second water sealing device is arranged at a slag discharge port of the disc centrifuge.

8. The explosion-proof system of a disk centrifuge as recited in claim 7, wherein: the first water seal device comprises a water seal tank, one side of the upper part of the water seal tank is connected with a sewage port through a pipeline, the other side of the upper part of the water seal tank is connected with a vent header pipe of a factory building through a first check valve, and a sewage outlet connected with a trench is further formed in the water seal tank; the second water sealing device comprises a slag pool, one side of the upper portion of the slag pool is connected with a slag discharge port through a pipeline, the other side of the upper portion of the slag pool is connected with a vent main pipe of a factory building through a second check valve, and a slag outlet is further formed in the slag pool.

9. The explosion-proof system of a disk centrifuge as recited in claim 1, wherein: the micro-pressure detection module comprises a second gas micro-pressure meter, a third gas flowmeter and a nitrogen filtering device, wherein the nitrogen filtering device, the third gas flowmeter and the second gas micro-pressure meter are sequentially connected in series on the nitrogen outlet pipe.

10. The explosion-proof system of a disk centrifuge as recited in claim 9, wherein: the nitrogen filtering device comprises a water washing tank, a gas-liquid separation tank and a gas source processor.

Technical Field

The invention relates to an explosion-proof system of a disc centrifuge, and belongs to the technical field of explosion-proof equipment of centrifuges.

Background

According to the knowledge, the three factors of explosion are temperature, fire source and oxygen, when the disc separator operates in an explosion-proof environment, the rotary drum rotates at a high speed to generate heat, easily volatilize inflammable and explosive materials to generate combustible gas, negative pressure is generated between the bottom of the rotary drum and the housing to suck outside air backwards, and if the explosion limit of the combustible gas is met, chemical explosion is easily caused when sparks are generated. When the existing disc centrifuge operates, explosion protection is generally carried out by directly introducing nitrogen into an inner cavity of the disc centrifuge, quantitative control is not available, and reliability is poor.

Disclosure of Invention

The invention aims to: aiming at the defects in the prior art, the explosion-proof system of the disk centrifuge is provided in an explosion-proof environment or under the condition of separating inflammable and explosive materials.

In order to achieve the above purpose, the invention provides an explosion-proof system of a disk centrifuge, which mainly comprises a nitrogen filling module, a separation sealing module and a micro-pressure detection module, wherein the separation sealing module comprises a fully-closed disk centrifuge, a cooling device, a first water sealing device and a second water sealing device, the nitrogen filling module is arranged at the top of the disk centrifuge, the nitrogen filling module comprises a nitrogen purging device and a nitrogen pressure maintaining device, the micro-pressure detection module is used for detecting the nitrogen pressure in the explosion-proof system, and the micro-pressure detection module is arranged at the upper part of a slag discharge port of the disk centrifuge.

The invention meets the requirement of safe operation of the whole set of system in an explosion-proof environment by the technical design of a fully-closed structure, a discharge port liquid seal structure and the like of the disc separator and the system design of on-line nitrogen filling protection, micro-pressure detection and the like.

Further, the top of the disc centrifuge is provided with a nitrogen inlet which is connected with a nitrogen inlet pipe; and the upper part of the slag discharge port of the disc centrifuge is provided with a nitrogen outlet which is connected with a nitrogen outlet pipe.

Furthermore, a nitrogen purging device and a nitrogen pressure maintaining device which are arranged in parallel are arranged on the nitrogen inlet pipe.

Furthermore, the nitrogen purging device consists of a nitrogen purging electromagnetic valve and a first gas flowmeter, and the nitrogen pressure maintaining device consists of a nitrogen pressure maintaining electromagnetic valve, a second gas flowmeter and a first gas micro-pressure meter.

Furthermore, first gas flowmeter, nitrogen gas sweep the solenoid valve and establish ties in proper order on the first branch pipe of nitrogen gas intake pipe, second gas flowmeter, nitrogen gas pressurize solenoid valve and first gas minute-pressure gauge establish ties in proper order on the second branch pipe of nitrogen gas intake pipe, the first branch pipe and the parallel arrangement of second branch pipe of nitrogen gas intake pipe.

After the structure is adopted, the nitrogen purging device works before the centrifuge runs, the working time is set, and the nitrogen purging electromagnetic valve is opened to ensure that air in the working cavity of the centrifuge is completely discharged; and in the starting and running processes of the centrifugal machine, switching to the nitrogen pressure maintaining device, starting the nitrogen pressure maintaining device to work, and opening the nitrogen pressure maintaining electromagnetic valve to enable the nitrogen flow in the pressure maintaining stage to be smaller than that in the purging stage.

Furthermore, the cooling device comprises an interlayer arranged outside the rotary drum of the disc centrifuge, the lower part of the interlayer is provided with a cooling water inlet, and the upper part of the interlayer is provided with a cooling water outlet.

In the structure, the outer machine body of the rotary drum adopts an interlayer structure, so that the outer machine body of the rotary drum carries out cooling water circulation through the cooling water inlet and the cooling water outlet, and the rotary drum machine body is cooled to ensure that the whole system runs at a low temperature.

Furthermore, the first water sealing device is arranged at a sewage port of the disc centrifuge, and the second water sealing device is arranged at a slag discharge port of the disc centrifuge. The first water seal device and the second water seal device are used for preventing gas leakage and air from mixing into the centrifuge.

Further, the first water seal device comprises a water seal tank, one side of the upper part of the water seal tank is connected with a sewage port through a pipeline, the other side of the upper part of the water seal tank is connected with a vent header pipe of a factory building through a first check valve, and a sewage outlet connected with a trench is further arranged on the water seal tank; the second water sealing device comprises a slag pool, one side of the upper portion of the slag pool is connected with a slag discharge port through a pipeline, the other side of the upper portion of the slag pool is connected with a vent main pipe of a factory building through a second check valve, and a slag outlet is further formed in the slag pool.

Furthermore, the micro-pressure detection module comprises a second gas micro-pressure meter, a third gas flowmeter and a nitrogen filtering device, wherein the nitrogen filtering device, the third gas flowmeter and the second gas micro-pressure meter are sequentially connected in series on the nitrogen outlet pipe.

The nitrogen filtering device and the third gas flowmeter are used for ensuring the safe use of the second gas micro-pressure meter.

Further, the nitrogen filtering device comprises a water washing tank, a gas-liquid separation tank and a gas source processor.

The invention has the advantages that the nitrogen pressure in the inner cavity of the disc centrifuge in the operation process is monitored on line by adopting the gas micro-pressure meter, and the quantitative control is carried out on the nitrogen input into the inner cavity of the centrifuge by the electromagnetic valve, so that the whole system is ensured to operate under the nitrogen micro-positive pressure, and the reliability of explosion prevention is improved.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a system diagram of the present invention.

FIG. 2 is a schematic view of a circulating cooling water sandwich structure according to the present invention.

In the figure: the device comprises a nitrogen gas flowmeter, a nitrogen gas purging electromagnetic valve, a nitrogen gas flowmeter, a nitrogen gas pressure maintaining electromagnetic valve, a first gas micro-pressure meter, a liquid flowmeter, a valve, a water washing tank, a gas-liquid separation tank, a gas source separator, a third gas flowmeter, a second gas micro-pressure meter, a first check valve, a water sealing tank, a second check valve and a slag pool, wherein the nitrogen gas flowmeter comprises 1, 2, a nitrogen gas purging electromagnetic valve, 3, a second nitrogen gas flowmeter, 4, a nitrogen gas pressure maintaining electromagnetic valve, 5, the first gas micro-pressure meter, 6, a liquid flowmeter, 7, a.

Detailed Description

Example one

The utility model provides a dish centrifuge explosion-proof system, its structure is shown in figure 1, mainly comprises PLC control system, fills nitrogen module, separation seal module and minute pressure detection module, and PLC control system links to each other with filling nitrogen module, separation seal module and minute pressure detection module respectively for gather fill nitrogen module, separation seal module and minute pressure detection module's information and control the operation of filling nitrogen module, separation seal module and minute pressure detection module. Wherein, the sealed module of separation includes totally enclosed disk centrifuge, cooling device, first water seal arrangement and second water seal arrangement, disk centrifuge's upper portion is equipped with material import and material export, be equipped with fluidflowmeter 6 and valve 7 on the material import, also be equipped with valve 7 on the material export, cooling device is including locating the outside intermediate layer of disk centrifuge rotary drum (sandwich structure sees figure 2), the built-in recirculated cooling water of intermediate layer, interbedded lower part has the cooling water import, upper portion is equipped with the cooling water export, the cooling water import, all be equipped with valve 7 on the cooling water export. The first water seal device and the second water seal device are used for preventing gas in the disc centrifuge from leaking, the first water seal device is arranged at a sewage port of the disc centrifuge, and the second water seal device is arranged at a slag discharge port of a slag discharge tank connected with the disc centrifuge. The first water sealing device comprises a water sealing tank 14, one side of the upper part of the water sealing tank 14 is connected with a sewage port through a pipeline, the other side of the upper part of the water sealing tank 14 is connected with a vent header pipe of a factory building through a first check valve 13, and a sewage outlet connected with a trench is further formed in the water sealing tank 14; the second water sealing device comprises a slag pool 16, one side of the upper part of the slag pool 16 is connected with a slag discharge port through a pipeline, the other side of the upper part of the slag pool 16 is connected with a vent main pipe of a factory building through a second check valve 15, and a slag outlet is further formed in the slag pool 16.

The nitrogen filling module is arranged at the top of the disc centrifuge and comprises a nitrogen purging device and a nitrogen pressure maintaining device. The top of the disk centrifuge is provided with a nitrogen inlet connected with a working cavity of the disk centrifuge, the nitrogen inlet is connected with a nitrogen inlet pipe, and a nitrogen purging device and a nitrogen pressure maintaining device are connected in parallel on the nitrogen inlet pipe. The nitrogen purging device consists of a nitrogen purging electromagnetic valve 2 and a first gas flowmeter 1, and the nitrogen pressure maintaining device consists of a nitrogen pressure maintaining electromagnetic valve 4, a second gas flowmeter 3 and a first gas micro-pressure meter 5. The first gas flowmeter 1 and the nitrogen purging electromagnetic valve 2 are sequentially connected in series on a first branch pipe of a nitrogen inlet pipe, the second gas flowmeter 3, the nitrogen pressure maintaining electromagnetic valve 4 and the first gas micro-pressure meter 5 are sequentially connected in series on a second branch pipe of the nitrogen inlet pipe, and the first branch pipe and the second branch pipe are connected in parallel.

The micro-pressure detection module is used for detecting the nitrogen pressure in the explosion-proof system and is arranged on the upper part of a slag discharge tank of the disc centrifuge. The upper part of a slag discharge tank of the disc centrifuge is provided with a nitrogen outlet which is connected with a nitrogen outlet pipe. The micro-pressure detection module is connected with the PLC control system for data exchange and comprises a second gas micro-pressure meter 12, a third gas flowmeter 11 and a nitrogen filtering device, and a valve 7, the nitrogen filtering device, the third gas flowmeter 11 and the second gas micro-pressure meter 12 are sequentially connected in series on a nitrogen outlet pipe. The nitrogen filtering device and the third gas flowmeter 11 are used for ensuring the safe use of the second gas micro-pressure meter 12. The nitrogen filtering device comprises a water washing tank 8, a gas-liquid separation tank 9 and a gas source separator 10, wherein the water washing tank 8 is connected in series with the nitrogen gas outlet pipe, the gas-liquid separation tank 9 is connected in series with the gas source separator 10 and then connected in parallel with the nitrogen gas outlet pipe, and the water washing tank 8 and the gas-liquid separation tank 9 are provided with water outlets. And the nitrogen enters the inner cavity of the disc centrifuge from the nitrogen inlet, then enters the slag discharging tank connected with the nitrogen inlet, and enters the nitrogen outlet pipe from the nitrogen outlet at the top of the slag discharging tank, and the nitrogen is filtered by the nitrogen filtering device at the nitrogen outlet pipe and finally reaches the second gas micro-pressure meter 12 for micro-pressure detection. If the pressure value detected by the second gas micro-pressure meter 12 is lower than the nitrogen safety set value of the PLC control system, the nitrogen inlet is switched to a nitrogen purging electromagnetic valve 2, and nitrogen supplement is performed in the inner cavity of the disc centrifuge (before the centrifuge is started, nitrogen is required to be purged, and air in the inner cavity of the disc centrifuge is completely replaced); and if the pressure value detected by the second gas micro-pressure meter 12 is not less than the nitrogen safety set value of the PLC control system, the disc type separator is allowed to start.

Before the system runs, the nitrogen purging electromagnetic valve 2 is opened, and the air in the inner cavity of the disc centrifuge is replaced by nitrogen within a certain time (the time can be adjusted by the PLC control system) so as to meet the requirement that the numerical value of a second gas micro-pressure meter 12 of the micro-pressure detection module is larger than or equal to the nitrogen safety set value of the PLC control system. At the moment, the system can be started, meanwhile, the nitrogen filling module is switched to the nitrogen pressure maintaining device, the nitrogen pressure maintaining electromagnetic valve 4 is opened, the nitrogen flow in the pressure maintaining stage is smaller than that in the purging stage, and the system can safely operate in micro-positive pressure.

This embodiment carries out on-line monitoring to the nitrogen pressure of the disk centrifuge inner chamber of operation in-process, carries out quantitative control to guarantee that entire system moves in the explosion-proof environment of nitrogen pressure-fired, improved explosion-proof reliability.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.