A multifunctional boiler feed water deoxygenation system

Abstract

The present invention relates to a multifunctional boiler feed water deoxygenation system, comprising a water tank, a deoxygenation water pump, a deaerator connected in sequence through a pipeline, a flow detection component connected between the water tank and the outlet of the deoxygenation water pump through a pipeline, the flow detection component comprising a standard flow meter and a flow meter to be measured, the deoxygenation water pump is a variable frequency water pump, and a switch valve is provided at the water inlet of the deaerator. Compared with the prior art, the present invention has the advantages of high equipment utilization, good economic benefits, low equipment investment cost, etc.

Description

Technical Field

[0001] The invention relates to a water treatment technology, in particular to a multifunctional boiler feed water deoxygenation system. Background Art

[0002] In the boiler feed water treatment process, deoxygenation is one of the key links. Oxygen is the main corrosive substance in the feed water system and boiler. The deoxygenation system is used to deoxygenate the boiler water to ensure the deoxygenation qualification rate, thereby eliminating the hidden dangers of long-term stable operation of the boiler.

[0003] In the existing boiler water replenishment system, the deaeration system is mainly used for boiler hot water replenishment. Since the boiler hot water is a closed circulation system with less water loss, the deaeration system is idle most of the time and has a large room for reuse. How to make full use of the deaeration system, improve equipment utilization, and generate greater economic benefits is an urgent problem to be solved; and when coupling other functions to the original deaeration system, it is necessary not to affect the realization of the original deaeration function. Summary of the invention

[0004] The purpose of the present invention is to provide a multifunctional boiler feed water deoxygenation system in order to overcome the defect of low utilization rate of the deoxygenation system in the above-mentioned prior art.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A multifunctional boiler feed water deoxygenation system comprises a water tank, a deoxygenation water pump, a deaerator connected in sequence through pipelines, and a flow detection component connected between the water tank and the outlet of the deoxygenation water pump through a pipeline, the flow detection component comprises a standard flow meter and a flow meter to be measured, the deoxygenation water pump is a variable frequency water pump, and a switch valve is provided at the water inlet of the deaerator.

[0007] When the flow detection component is working, the water in the water tank passes through the standard flow meter and the flow meter to be tested in turn.

[0008] The flow detection assembly also includes a first butterfly valve connected to a standard flow meter and a second butterfly valve connected to the flow meter to be tested.

[0009] The upstream straight pipe section length of the standard flowmeter is at least 15D, and the downstream straight pipe section length is at least 5D; the upstream straight pipe section length of the flowmeter to be tested is at least 15D, and the downstream straight pipe section length is at least 5D, where D is the nominal diameter of the pipeline.

[0010] The length of the upstream straight pipe section of the standard flow meter is 15D, the length of the straight pipe section between the standard flow meter and the flow meter to be measured is 10D, and the length of the downstream straight pipe section of the flow meter to be measured is 10D.

[0011] The diameter of the pipe between the deoxygenation water pump and the upstream straight pipe section of the standard flowmeter, and the diameter of the pipe between the downstream straight pipe section of the flowmeter to be measured and the water tank is DN150, and the diameter of the pipe upstream straight pipe section of the standard flowmeter, the straight pipe section between the standard flowmeter and the flowmeter to be measured, and the downstream straight pipe section of the flowmeter to be measured is DN100.

[0012] A third butterfly valve is provided at the water inlet of the deaeration water pump, and a fourth butterfly valve is provided at the water outlet of the deaeration water pump.

[0013] The deaeration water pumps are provided with two, and the two deaeration water pumps are connected in parallel.

[0014] The working principle of the present invention is:

[0015] When the boiler needs to be replenished with water, turn on the deaerator pump to send the water in the water tank to the oxygenator for deaeration, so as to obtain water with a lower oxygen content as the boiler replenishment water, thereby realizing the boiler replenishment function. When the boiler does not need to be replenished with water, close the switch valve on the pipeline at the water inlet of the deaerator, and use the water tank, variable frequency water pump, standard flow meter and the flow meter to be tested to form a closed circulation system. Use the frequency converter of the variable frequency water pump to control the variable frequency water pump to change the system flow, and compare whether the deviation between the measured flow meter and the standard flow meter is within a reasonable range, so as to verify whether the measured flow meter is qualified, thereby realizing the detection function of the flow meter.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) Reduce the idle time of the deaeration system, improve the utilization rate of the entire system, and couple the water replenishment function and flow meter test function into one system, which is conducive to reducing equipment investment and improving economic benefits;

[0018] (2) The coupled flow meter test function is a common function in the field of water treatment technology, and the flow meter detection is an intermittent and interruptible operation, which will not affect the original deoxygenation function. The user can reasonably arrange the time of the deoxygenation function and the flow test function, and the two functions are intermittently completed and coordinated with each other;

[0019] (3) The flow detection function can help water treatment users judge the quality of their metering equipment, reduce the cost of third-party calibration of the company's metering equipment, and improve economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] In the figure, 1 is a water tank, 2 is a deaeration water pump, 3 is a standard flow meter, 4 is a flow meter to be measured, 5 is a first butterfly valve, 6 is a second butterfly valve, 7 is a third butterfly valve, and 8 is a fourth butterfly valve. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several variations and improvements may be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0023] Example

[0024] A multifunctional boiler feed water deaeration system, such as Figure 1 As shown, it includes a water tank 1, a deoxygenation water pump 2, a deaerator, and a flow detection component connected between the water tank 1 and the outlet of the deoxygenation water pump 2 through a pipeline. The flow detection component includes a first butterfly valve 5, a standard flow meter 3, a flow meter to be measured 4, and a second butterfly valve 6, which are sequentially connected by pipelines along the water flow direction. The first butterfly valve 5 and the second butterfly valve 6 are used for the maintenance of the standard flow meter 3, the flow meter to be measured 4 and related pipelines. The deoxygenation water pump 2 is a variable frequency water pump. A switch valve is provided at the water inlet of the deaerator. A third butterfly valve 7 is provided at the water inlet of the deoxygenation water pump 2. A fourth butterfly valve 8 is provided at the water outlet of the deoxygenation water pump 2. Two deoxygenation water pumps 2 are provided, and the two deoxygenation water pumps 2 are connected in parallel.

[0025] To meet the installation requirements of the flowmeter, the upstream straight pipe length of the standard flowmeter is at least 15D, and the downstream straight pipe length is at least 5D; the upstream straight pipe length of the flowmeter 4 to be tested is at least 15D, and the downstream straight pipe length is at least 5D, where D is the nominal diameter of the pipeline. In summary, the upstream straight pipe length of the standard flowmeter is 15D, the straight pipe length between the standard flowmeter and the flowmeter 4 to be tested is 10D, and the downstream straight pipe length of the flowmeter 4 to be tested is 10D.

[0026] The diameter of the pipe between the deoxygenation water pump 2 and the upstream straight pipe section of the standard flowmeter, and the pipe between the downstream straight pipe section of the flowmeter to be measured 4 and the water tank 1 is DN150, and the diameter of the pipe upstream straight pipe section of the standard flowmeter, the straight pipe section between the standard flowmeter and the flowmeter to be measured 4, and the downstream straight pipe section of the flowmeter to be measured 4 is DN100.

[0027] In this embodiment, a DN100 pipe is added at the outlet of the deaeration water pump of the original system, so that the flow pumped out from the water tank by the deaeration water pump can return to the water tank along the newly added pipe; then a longer straight pipe section (greater than 35D) is cut from the newly added DN100 pipe and replaced with DN150; and a standard flow meter and a flow meter to be tested are installed on this DN150 straight pipe section. During installation, the minimum measurement requirement of 10D in front and 5D in the back is required to be met. Finally, butterfly valves are added at the front and rear ends of the newly added pipe for maintenance. This embodiment realizes the coupling of the flow detection device to the deaeration device, thereby improving the utilization rate of the deaeration system.

[0028] This embodiment closes the pipeline valve at the inlet of the deaerator to form a closed circulation system from the water tank to the deaerator pump and then back to the water tank. The frequency converter is used to control the deaerator pump to change the system flow rate, and the deviation between the measured flow meter and the standard flow meter is compared to see if it is within a reasonable range, thereby calibrating whether the measured flow meter is qualified.

[0029] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art may make various modifications or variations within the scope of the claims, which do not affect the essence of the present invention.

Claims

1. A multifunctional boiler feed water deoxygenation system, characterized in that: The invention comprises a water tank (1), a deoxygenating water pump (2), a deaerator, and a flow detection assembly connected between the outlets of the water tank (1) and the deoxygenating water pump (2) through a pipeline; the flow detection assembly comprises a standard flow meter (3) and a flow meter to be measured (4), and also comprises a first butterfly valve (5) connected to the standard flow meter (3) and a second butterfly valve (6) connected to the flow meter to be measured (4); when the flow detection assembly is in operation, water in the water tank (1) passes through the standard flow meter (3) and the flow meter to be measured (4) in sequence; The length of the upstream straight pipe section of the standard flow meter (3) is at least 15D, and the length of the downstream straight pipe section is at least 5D; the length of the upstream straight pipe section of the flow meter to be measured (4) is at least 15D, and the length of the downstream straight pipe section is at least 5D, wherein D is the nominal diameter of the pipe; the diameter of the pipe between the deoxygenated water pump (2) and the upstream straight pipe section of the standard flow meter (3), and the pipe between the downstream straight pipe section of the flow meter to be measured (4) and the water tank (1) is DN150, and the diameter of the upstream straight pipe section of the standard flow meter (3), the straight pipe section between the standard flow meter (3) and the flow meter to be measured (4), and the downstream straight pipe section of the flow meter to be measured (4) is DN100; The deaerator water pump (2) is a variable frequency water pump, and a switch valve is provided at the water inlet of the deaerator; a third butterfly valve (7) is provided at the water inlet of the deaerator water pump (2), and a fourth butterfly valve (8) is provided at the water outlet of the deaerator water pump (2); When the boiler needs to be replenished with water, the deaeration water pump (2) is turned on to send the water in the water tank (1) into the deaerator for deoxygenation, thereby obtaining water with a lower oxygen content as boiler replenishment water; When the boiler does not need to be replenished with water, the switch valve on the pipeline at the water inlet of the deaerator is closed, and a closed circulation system is formed by using the water tank (1), the deaerator water pump (2), the standard flow meter (3) and the flow meter to be tested (4). The frequency converter of the deaerator water pump (2) is used to control the deaerator water pump (2) to change the system flow, and the deviation between the flow meter to be tested (4) and the standard flow meter (3) is compared to see whether it is within a reasonable range, thereby verifying whether the flow meter to be tested (4) is qualified.

2. A multifunctional boiler feed water deoxygenation system according to claim 1, characterized in that: The length of the upstream straight pipe section of the standard flow meter (3) is 15D, the length of the straight pipe section between the standard flow meter (3) and the flow meter to be measured (4) is 10D, and the length of the downstream straight pipe section of the flow meter to be measured (4) is 10D.

3. A multifunctional boiler feed water deoxygenation system according to claim 1, characterized in that: Two deaeration water pumps (2) are provided, and the two deaeration water pumps (2) are connected in parallel.

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