CN-122010222-A - Double-stage degassing device and energy-saving operation control method

CN122010222ACN 122010222 ACN122010222 ACN 122010222ACN-122010222-A

Abstract

The invention belongs to the technical field of water treatment, and provides a two-stage degassing device and an energy-saving operation control method, wherein the device comprises a first-stage degassing unit, a second-stage degassing unit and a control system; the control system is used for judging secondary start-stop conditions according to the circulating water monitoring data and a preset threshold ratio to obtain secondary start-stop condition judgment results and controlling the start-stop state of the secondary degassing unit according to the secondary start-stop condition judgment results, and the secondary degassing unit is used for deeply removing residual free gas and dissolved oxygen in the circulating water after primary degassing in a vacuum environment. According to the scheme, through the cooperative linkage of the primary degassing unit, the secondary degassing unit and the control system, the layered treatment and intelligent regulation of the circulating water degassing are realized, and the scheme has the advantages of excellent degassing effect and energy conservation.

Inventors

LU ZHANMING
GE JIANXIN
SONG PING
YANG LONG

Assignees

北京洁禹通环保科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260324

Claims (10)

1. The double-stage degassing device is characterized by comprising a primary degassing unit, a secondary degassing unit and a control system; The first-stage degassing unit is connected with the second-stage degassing unit in series, and the control system is respectively and electrically connected with the first-stage degassing unit and the second-stage degassing unit; The first-stage degassing unit is used for performing basic removal on free gas in the circulating water, outputting the circulating water subjected to first-stage degassing, and collecting and sending circulating water monitoring data to the control system; The control system is used for judging secondary start-stop conditions according to the circulating water monitoring data and a preset threshold ratio, obtaining secondary start-stop condition judgment results, and controlling the start-stop state of the secondary degassing unit according to the secondary start-stop condition judgment results; and the secondary degassing unit is used for deeply removing residual free gas and dissolved oxygen in the circulating water after the primary degassing in a vacuum environment.
2. The dual stage degasser of claim 1, wherein said primary degasser unit comprises a centrifugal degasser tank, an automatic vent valve and a data monitoring device; The water inlet of the centrifugal degassing tank is connected with a backwater main pipe of the circulating water system, the automatic exhaust valve is arranged at the top of the centrifugal degassing tank, and the data monitoring equipment is arranged on the corresponding pipelines of the centrifugal degassing tank and the automatic exhaust valve.
3. The dual stage degasser of claim 2, wherein said data monitoring device comprises a gas mass flow meter and a dissolved oxygen detector; the gas mass flowmeter is arranged on an exhaust port pipeline of the automatic exhaust valve and is used for collecting the gas flow which is separated in unit time; The dissolved oxygen detector is arranged on a water outlet pipeline of the centrifugal degassing tank and is used for monitoring the content of dissolved oxygen in the circulating water after primary degassing.
4. The dual-stage degasser of claim 2, wherein the secondary degasser unit comprises a vacuum forced degasser and a degassing pump; The water inlet of the vacuumizing forced degassing device is connected with the water outlet of the centrifugal degassing tank, and the water outlet of the vacuumizing forced degassing device is connected with a water main pipe of the circulating water system; the degassing pump is connected with the vacuumizing forced degassing device, and is used for providing a vacuum environment for the vacuumizing forced degassing device and exhausting the removed gas.
5. The two-stage degassing device according to claim 1, wherein the control system performs two-stage start-stop condition judgment according to the circulating water monitoring data and a preset threshold ratio strategy to obtain a two-stage start-stop condition judgment result, and the two-stage start-stop condition judgment result comprises: Comparing the circulating water monitoring data with a set upper limit threshold value when the secondary degassing unit is in a stop state, so as to obtain a first comparison result; determining a secondary starting condition judgment result according to the first comparison result; Comparing the circulating water monitoring data with a set lower threshold value when the secondary degassing unit is in a starting state, so as to obtain a second comparison result; determining a secondary shutdown condition judgment result according to the second comparison result; And taking the secondary starting condition judgment result and the secondary stopping condition judgment result as secondary starting and stopping condition judgment results.
6. The dual stage degasser of claim 5, wherein the circulating water monitoring data comprises gas flow and dissolved oxygen content; Comparing the circulating water monitoring data with a set upper threshold value to obtain a first comparison result, wherein the first comparison result comprises the following steps: comparing the gas flow with a preset flow upper limit value to obtain a flow upper limit comparison result; Comparing the dissolved oxygen content with a preset oxygen content upper limit value to obtain an oxygen content upper limit comparison result; and comparing the flow upper limit comparison result with the oxygen content upper limit comparison result to obtain a first comparison result.
7. The dual stage degasser of claim 6, wherein determining a secondary start-up condition determination result based on said first comparison result comprises: if the flow upper limit comparison result in the first comparison result meets that the gas flow is larger than the flow upper limit value, and/or the oxygen content upper limit comparison result in the first comparison result meets that the dissolved oxygen content is larger than the oxygen content upper limit value, determining that a secondary starting condition judgment result is that a secondary starting condition is met; and if the flow upper limit comparison result in the first comparison result meets that the gas flow is smaller than or equal to the flow upper limit value, and the oxygen content upper limit comparison result in the first comparison result meets that the dissolved oxygen content is smaller than or equal to the oxygen content upper limit value, determining that the secondary starting condition judgment result is not met.
8. The dual stage degasser of claim 5, wherein the circulating water monitoring data comprises gas flow and dissolved oxygen content; Comparing the circulating water monitoring data with a set lower threshold value to obtain a second comparison result, wherein the second comparison result comprises the following steps: comparing the gas flow with a preset flow lower limit value to obtain a flow lower limit comparison result; comparing the dissolved oxygen content with a preset oxygen content lower limit value to obtain an oxygen content lower limit comparison result; and comparing the flow lower limit comparison result with the oxygen content lower limit comparison result to obtain a second comparison result.
9. The dual stage degasser of claim 8, wherein determining a secondary shutdown condition determination based on the second comparison result comprises: If the flow lower limit comparison result in the second comparison result meets that the gas flow is lower than the flow lower limit value, and the oxygen content lower limit comparison result in the second comparison result meets that the dissolved oxygen content is lower than the oxygen content lower limit value, determining that a secondary shutdown condition judgment result meets a secondary shutdown condition; And if the flow lower limit comparison result in the second comparison result meets that the gas flow is larger than or equal to the flow lower limit value, and/or the oxygen content lower limit comparison result in the second comparison result meets that the dissolved oxygen content is larger than or equal to the oxygen content lower limit value, determining that the secondary shutdown condition judgment result is not met.
10. A method of energy efficient operation control, characterized in that it is based on a dual stage degasser according to any of claims 1 to 9, said method comprising: the method comprises the steps of performing basic removal on free gas in circulating water through a primary degassing unit, outputting circulating water subjected to primary degassing, and collecting and sending circulating water monitoring data to a control system; judging secondary start-stop conditions according to the circulating water monitoring data and a preset threshold ratio strategy by a control system to obtain secondary start-stop condition judgment results, and controlling the start-stop state of a secondary degassing unit according to the secondary start-stop condition judgment results; and deeply removing residual free gas and dissolved oxygen in the circulating water after the primary degassing by a secondary degassing unit in a vacuum environment.

Description

Double-stage degassing device and energy-saving operation control method Technical Field The invention relates to the technical field of water treatment, in particular to a two-stage degassing device and an energy-saving operation control method. Background The circulating water system is widely applied to industrial and civil scenes such as heating, air conditioning, industrial cooling and the like, circulating water in the system usually contains free gas and dissolved oxygen, and the existence of the gas can cause a plurality of adverse effects on the safe and stable operation of the circulating water system, namely, the free gas is easy to form a gas plug in a pipeline to damage the hydraulic balance of the system, the heat exchange efficiency of heat exchange equipment is greatly reduced, the dissolved oxygen can accelerate the metal corrosion of the pipeline and the equipment, and meanwhile, a proper condition is provided for microorganism breeding, so that the service life of the system equipment is shortened, and the overall energy efficiency and the operation stability of the circulating water system are further influenced. In order to solve the above problems, a plurality of deaerators for a circulating water system have appeared in the prior art, and the deaerators are mainly divided into two types of basic deaeration equipment and deep deaeration equipment, wherein the two types of equipment have technical advantages and obvious defects, and the dual requirements of the circulating water system on deaeration effect and energy-saving operation are difficult to be met independently. The deep degassing equipment can effectively separate out and remove residual free gas and dissolved oxygen in water by creating a vacuum environment, has obvious degassing effect and can meet the deep degassing requirement of a system, however, the equipment needs to be continuously operated by a matched power component to maintain the vacuum environment, has high energy consumption and high operation cost, and can cause a large amount of energy waste if continuously operated in a normal state with lower gas content of a circulating water system. Therefore, the traditional degasser has the technical problems that the operation cost and the degassing quality are difficult to be compatible. Disclosure of Invention The invention provides a two-stage degassing device and an energy-saving operation control method, which are used for solving the defect that the operation cost and the degassing quality of the traditional degassing device are difficult to be compatible. In one aspect, the invention provides a dual-stage degasser, comprising a primary degasser unit, a secondary degasser unit and a control system; The first-stage degassing unit is connected with the second-stage degassing unit in series, and the control system is respectively and electrically connected with the first-stage degassing unit and the second-stage degassing unit; The first-stage degassing unit is used for performing basic removal on free gas in the circulating water, outputting the circulating water subjected to first-stage degassing, and collecting and sending circulating water monitoring data to the control system; The control system is used for judging secondary start-stop conditions according to the circulating water monitoring data and a preset threshold ratio, obtaining secondary start-stop condition judgment results, and controlling the start-stop state of the secondary degassing unit according to the secondary start-stop condition judgment results; and the secondary degassing unit is used for deeply removing residual free gas and dissolved oxygen in the circulating water after the primary degassing in a vacuum environment. The invention provides a two-stage degassing device, which comprises a centrifugal degassing tank, an automatic exhaust valve and data monitoring equipment, wherein the centrifugal degassing tank is connected with the automatic exhaust valve; The water inlet of the centrifugal degassing tank is connected with a backwater main pipe of the circulating water system, the automatic exhaust valve is arranged at the top of the centrifugal degassing tank, and the data monitoring equipment is arranged on the corresponding pipelines of the centrifugal degassing tank and the automatic exhaust valve. The two-stage degasser provided by the invention comprises a gas mass flowmeter and a dissolved oxygen detector; the gas mass flowmeter is arranged on an exhaust port pipeline of the automatic exhaust valve and is used for collecting the gas flow which is separated in unit time; The dissolved oxygen detector is arranged on a water outlet pipeline of the centrifugal degassing tank and is used for monitoring the content of dissolved oxygen in the circulating water after primary degassing. The two-stage degassing device provided by the invention comprises a vacuumizing forced degassing device and a degassing pump; The water inlet of the vacuu