Condensation type gas-steam boiler water supply system and using method thereof

Abstract

The invention discloses a condensation type gas-steam boiler water supply system and a using method thereof, belongs to the technical field of gas-steam boilers, and solves the technical problem that an existing boiler water supply pipeline is unreasonable in design. According to the solution, the water supply system of the condensation type gas-steam boiler comprises a boiler barrel, an electrode type water level gauge, a boiler controller, a softened water tank, a condenser, an energy saver, a first water feeding pump, a second water feeding pump and a connecting water pipe; the electrode type water level gauge is arranged on the side wall of the boiler barrel and electrically connected with the boiler controller. The energy saver and the condenser are arranged in the flowing direction of boiler flue gas, and a spacing distance is arranged between the energy saver and the condenser. Under the combined action of the boiler electrode type water level gauge, the boiler controller and the electromagnetic valve, the boiler barrel is reliably supplied with water, the energy saver and the condenser can be fully cooled, the smoke temperature can be reduced to about 50 DEG C, and the energy-saving requirement is met; and meanwhile, the energy saver and the condenser can be flexibly put into operation and split, and maintenance and replacement are convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of gas steam boilers, and particularly relates to a condensing gas steam boiler water supply system and a use method thereof. Background Art

[0002] Gas steam boilers are widely used in industrial production and social life. According to the requirements of relevant boiler specifications, most gas steam boilers are equipped with economizers and condensers at the tail flue to reduce the boiler exhaust temperature, obtain higher boiler thermal efficiency, and improve the economy of boiler operation.

[0003] According to different user scenarios, the load variation range of condensing gas steam boilers is large, and the water supply to the drum is intermittent. As important components of condensing boilers, steam condensers and economizers are independently arranged on the flue at the rear of the boiler body. They should be reliably cooled under any load of the boiler so that the exhaust gas temperature can reach about 50°C. Reasonable boiler water supply pipeline design is an urgent problem that technicians in this field need to solve. Summary of the invention

[0004] The main purpose of the present invention is to overcome the deficiencies in the prior art and solve the problems existing in the prior art. The present invention provides a condensing gas steam boiler water supply system and a method of using the same.

[0005] The present invention is implemented through the following technical scheme: a condensing gas steam boiler water supply system, including a boiler drum, an electrode water level gauge, a boiler controller, a soft water tank, a condenser, an economizer, a first water supply pump, a second water supply pump and a connecting water pipe; the electrode water level gauge is arranged on the side wall of the boiler drum, and the electrode water level gauge is electrically connected to the boiler controller; the economizer and the condenser are arranged in sequence along the flow direction of the boiler flue gas, wherein: The water outlet of the soft water tank is communicated with a horizontal interface of the first three-way joint through a connecting water pipe, the other horizontal interface of the first three-way joint is communicated with the water inlet of the first water supply pump through a connecting water pipe, the water outlet of the first water supply pump is communicated with a horizontal interface of the second three-way joint through a connecting water pipe, the other horizontal interface of the second three-way joint is communicated with a horizontal interface of the third three-way joint, the other horizontal interface of the third three-way joint is communicated with a horizontal interface of the fourth three-way joint through a connecting water pipe, the other horizontal interface of the fourth three-way joint is communicated with a horizontal interface of the fifth three-way joint through a connecting water pipe, the other horizontal interface of the fifth three-way joint is communicated with a horizontal interface of the four-way joint through a connecting water pipe, and the other horizontal interface of the four-way joint is communicated with the water inlet of the soft water tank through a connecting water pipe; The vertical interface of the first three-way joint is connected to the water inlet of the second water supply pump through a connecting water pipe, and the water outlet of the second water supply pump is connected to the vertical interface of the second three-way joint through a connecting water pipe; The vertical interface of the third three-way joint is connected to the water inlet of the condenser through a connecting water pipe, and the water outlet of the condenser is connected to the vertical interface of the fourth three-way joint through a connecting water pipe; the vertical interface of the fifth three-way joint is connected to the water inlet of the economizer through a connecting water pipe, and the water outlet of the economizer is connected to one vertical interface of the four-way joint through a connecting water pipe, and the other vertical interface of the four-way joint is connected to the water inlet of the boiler drum through a connecting water pipe; Shut-off valves are installed on the connecting water pipes between the first three-way joint and the first water supply pump, between the first water supply pump and the second three-way joint, between the first three-way joint and the second water supply pump, between the second water supply pump and the second three-way joint, between the third three-way joint and the fourth three-way joint, between the third three-way joint and the condenser, between the condenser and the fourth three-way joint, between the fifth three-way joint and the economizer, between the economizer and the four-way joint, and between the fifth three-way joint and the four-way joint; A solenoid valve is installed on the connecting water pipe between the four-way joint and the soft water tank, and a solenoid valve and a check valve are installed on the connecting water pipe between the four-way joint and the boiler drum.

[0006] A method for using a condensing gas steam boiler water supply system, when the gas steam boiler is in normal or abnormal working conditions, according to the water level of the boiler drum, by controlling the opening and closing of the valves on the connecting pipes between the condenser, the economizer and the boiler drum, different water supply pipelines are used to supply water to the boiler. The "normal working conditions" of the gas steam boiler refer to: the operating parameters (pressure and temperature) of the gas steam boiler are stable, the combustion conditions are good (normal flame shape, high combustion efficiency), the operating sound is normal, and all parts are intact, and the gas steam boiler is in a normal working state as a whole; the "abnormal working conditions" of the gas steam boiler refer to: the economizer or condenser of the boiler leaks, or even the economizer or condenser does not work, and the economizer or condenser needs to be disconnected from the system.

[0007] Furthermore, the method of using the condensing gas steam boiler water supply system specifically includes the method of using it under the following working conditions: 1. Gas steam boiler under normal working conditions: 1) When the water level in the boiler drum is within the normal water level range (Note: the position of the "normal water level" of different types of boilers is different, but the rated range of the "normal water level" corresponding to the boiler model will be clearly indicated when the boiler leaves the factory), water is supplied to the boiler through the first water supply pipeline. The first water supply pipeline is: close the stop valve between the third three-way joint and the fourth three-way joint, the stop valve between the fifth three-way joint and the four-way joint, and the solenoid valve between the four-way joint and the soft water tank, and at the same time close the stop valve between the first three-way joint and the first water supply pump, and between the first water supply pump and the second three-way joint, or close the stop valve between the first three-way joint and the second water supply pump, and between the second water supply pump and the second three-way joint, and the other valves are opened; the water in the soft water tank is pressurized by the first water supply pump or the second water supply pump and flows through the condenser and the economizer in sequence before entering the boiler drum; 2) When the water level in the boiler drum exceeds the upper limit of the normal water level by at least 30 mm (i.e., the high water level range), the boiler feed water returns to the soft water tank through the first feed water bypass. The first feed water bypass is: close the stop valve between the third three-way joint and the fourth three-way joint, the stop valve between the fifth three-way joint and the four-way joint, and the solenoid valve between the four-way joint and the boiler drum, and at the same time close the stop valve between the first three-way joint and the first feed water pump, and between the first feed water pump and the second three-way joint, or close the stop valve between the first three-way joint and the second feed water pump, and between the second feed water pump and the second three-way joint, and open the other valves; the water in the soft water tank is pressurized by the first feed water pump or the second feed water pump and flows through the condenser and the economizer in sequence, and then returns to the soft water tank; 2. Disconnection of condenser under abnormal working conditions of gas steam boiler: 1) When the water level of the boiler drum is within the normal water level range, water is supplied to the boiler through the second water supply pipeline. The second water supply pipeline is as follows: close the stop valve between the third three-way joint and the condenser, the stop valve between the condenser and the fourth three-way joint, the stop valve between the fifth three-way joint and the four-way joint, and the solenoid valve between the four-way joint and the soft water tank, and at the same time close the stop valve between the first three-way joint and the first water supply pump, and between the first water supply pump and the second three-way joint, or close the stop valve between the first three-way joint and the second water supply pump, and between the second water supply pump and the second three-way joint, and open the other valves; the water in the soft water tank is pressurized by the first water supply pump or the second water supply pump and then flows through the economizer into the boiler drum; 2) When the water level in the boiler drum exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank through the second feed water bypass. The second feed water bypass is: close the stop valve between the third three-way joint and the condenser, the stop valve between the condenser and the fourth three-way joint, the stop valve between the fifth three-way joint and the four-way joint, and the solenoid valve between the four-way joint and the boiler drum, and at the same time close the stop valve between the first three-way joint and the first feed water pump, and between the first feed water pump and the second three-way joint, or close the stop valve between the first three-way joint and the second feed water pump, and between the second feed water pump and the second three-way joint, and the other valves are opened; the water in the soft water tank is pressurized by the first feed water pump or the second feed water pump and then flows through the economizer and returns to the soft water tank; 3. When the gas steam boiler is in abnormal working condition, the economizer is disconnected: 1) When the water level of the boiler drum is within the normal water level range, water is supplied to the boiler through the third water supply pipeline. The third water supply pipeline is: close the stop valve between the third three-way joint and the fourth three-way joint, the stop valve between the fifth three-way joint and the economizer, the stop valve between the economizer and the four-way joint, and the solenoid valve between the four-way joint and the soft water tank, and at the same time close the stop valve between the first three-way joint and the first water supply pump, between the first water supply pump and the second three-way joint, or at the same time close the stop valve between the first three-way joint and the second water supply pump, between the second water supply pump and the second three-way joint, and open the other valves; the water in the soft water tank is pressurized by the first water supply pump or the second water supply pump and then flows through the condenser into the boiler drum; 2) When the water level in the boiler drum exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank through the third feed water bypass. The third feed water bypass is: close the stop valve between the third three-way joint and the fourth three-way joint, the stop valve between the fifth three-way joint and the economizer, the stop valve between the economizer and the four-way joint, and the solenoid valve between the four-way joint and the boiler drum, and at the same time close the stop valve between the first three-way joint and the first feed water pump, and between the first feed water pump and the second three-way joint, or close the stop valve between the first three-way joint and the second feed water pump, and between the second feed water pump and the second three-way joint, and the other valves are opened; the water in the soft water tank is pressurized by the first feed water pump or the second feed water pump and then flows through the condenser and returns to the soft water tank; 4. When the gas steam boiler is in abnormal working condition, the condenser and the economizer are disconnected: 1) When the water level of the boiler drum is within the normal water level range, water is supplied to the boiler through the fourth water supply pipeline. The fourth water supply pipeline is as follows: close the stop valve between the third three-way joint and the condenser, the stop valve between the condenser and the fourth three-way joint, the stop valve between the fifth three-way joint and the economizer, the stop valve between the economizer and the four-way joint, and the solenoid valve between the four-way joint and the soft water tank, and at the same time close the stop valve between the first three-way joint and the first water supply pump, the stop valve between the first water supply pump and the second three-way joint, or at the same time close the stop valve between the first three-way joint and the second water supply pump, the stop valve between the second water supply pump and the second three-way joint, and the other valves are opened; the water in the soft water tank enters the boiler drum after being pressurized by the first water supply pump or the second water supply pump; 2) When the condenser and the economizer are disconnected under abnormal working conditions of the gas steam boiler, and the water level in the boiler drum is at least 30 mm higher than the upper limit of the normal water level, the boiler feed water returns to the soft water tank through the fourth feed water bypass. The fourth feed water bypass is: closing the stop valve between the third three-way joint and the condenser, the stop valve between the condenser and the fourth three-way joint, the stop valve between the fifth three-way joint and the economizer, the stop valve between the economizer and the four-way joint, and the solenoid valve between the four-way joint and the boiler drum, and at the same time closing the stop valve between the first three-way joint and the first feed water pump, the stop valve between the first feed water pump and the second three-way joint, or closing the stop valve between the first three-way joint and the second feed water pump, the stop valve between the second feed water pump and the second three-way joint, and the other valves are opened; the water in the soft water tank is pressurized by the first feed water pump or the second feed water pump and then returns to the soft water tank.

[0008] The beneficial effects of the present invention are: The design of the water supply pipeline of the condensing gas steam boiler in the present invention can adapt to various load conditions of the boiler. By utilizing the combined effect of the boiler electrode water level gauge, boiler controller and solenoid valve, the boiler drum can be reliably supplied with water, the economizer and condenser can be fully cooled, and the flue gas temperature can be reduced to about 50°C, meeting the energy-saving requirements; at the same time, the economizer and condenser can be flexibly put into operation and decoupled, which is convenient for maintenance and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the present invention. DETAILED DESCRIPTION

[0010] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0011] like Figure 1A condensing gas steam boiler water supply system shown in the figure comprises a boiler drum 1, an electrode water level gauge 2, a boiler controller 3, a soft water tank 4, a condenser 5, an economizer 6, a first feed water pump 9, a second feed water pump 7 and a connecting water pipe; the electrode water level gauge 2 is arranged on the side wall of the boiler drum 1, and the electrode water level gauge 2 is electrically connected to the boiler controller 3; the economizer 6 and the condenser 5 are arranged along the flow direction of the boiler flue gas, and there is a distance between the economizer 6 and the condenser 5, wherein: The water outlet of the soft water tank 4 is communicated with a horizontal interface of the first three-way joint 8 through a connecting water pipe, the other horizontal interface of the first three-way joint 8 is communicated with the water inlet of the first water supply pump 9 through a connecting water pipe, the water outlet of the first water supply pump 9 is communicated with a horizontal interface of the second three-way joint 10 through a connecting water pipe, the other horizontal interface of the second three-way joint 10 is communicated with a horizontal interface of the third three-way joint 11, the other horizontal interface of the third three-way joint 11 is communicated with a horizontal interface of the fourth three-way joint 12 through a connecting water pipe, the other horizontal interface of the fourth three-way joint 12 is communicated with a horizontal interface of the fifth three-way joint 13 through a connecting water pipe, the other horizontal interface of the fifth three-way joint 13 is communicated with a horizontal interface of the four-way joint 14 through a connecting water pipe, and the other horizontal interface of the four-way joint 14 is communicated with the water inlet of the soft water tank 4 through a connecting water pipe; The vertical interface of the first three-way joint 8 is connected to the water inlet of the second water supply pump 7 through a connecting water pipe, and the water outlet of the second water supply pump 7 is connected to the vertical interface of the second three-way joint 10 through a connecting water pipe; The vertical interface of the third three-way joint 11 is connected to the water inlet of the condenser 5 through a connecting water pipe, and the water outlet of the condenser 5 is connected to the vertical interface of the fourth three-way joint 12 through a connecting water pipe; the vertical interface of the fifth three-way joint 13 is connected to the water inlet of the economizer 6 through a connecting water pipe, and the water outlet of the economizer 6 is connected to a vertical interface of the four-way joint 14 through a connecting water pipe, and the other vertical interface of the four-way joint 14 is connected to the water inlet of the drum 1 through a connecting water pipe; Shut-off valves are installed on the connecting water pipes between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, between the third three-way joint 11 and the fourth three-way joint 12, between the third three-way joint 11 and the condenser 5, between the condenser 5 and the fourth three-way joint 12, between the fifth three-way joint 13 and the economizer 6, between the economizer 6 and the four-way joint 14, and between the fifth three-way joint 13 and the four-way joint 14; A solenoid valve is installed on the connecting water pipe between the four-way joint 14 and the soft water tank 4 , and a solenoid valve and a check valve are installed on the connecting water pipe between the four-way joint 14 and the boiler drum 1 .

[0012] A method for using a condensing gas steam boiler water supply system, when the gas steam boiler is in normal or abnormal working conditions, according to the water level of the drum 1, by controlling the opening and closing of the valves on the connecting pipes between the condenser 5, the economizer 6 and the drum 1, different water supply pipelines are used to supply water to the boiler. The method for using the condensing gas steam boiler water supply system specifically includes the following working conditions: 1) When the gas steam boiler is in normal working condition and the water level in drum 1 is within the normal water level range, water is supplied to the boiler through the first water supply pipeline; 2) When the gas steam boiler is in normal working condition and the water level in the drum 1 is at least 30 mm above the upper limit of the normal water level, the boiler feed water returns to the soft water tank 4 through the first feed water bypass; 3) When the condenser 5 is disconnected under abnormal working conditions of the gas steam boiler and the water level of the drum 1 is within the normal water level range, water is supplied to the boiler through the second water supply pipeline; 4) When the condenser 5 is disconnected under abnormal working conditions of the gas steam boiler, and the water level of the drum 1 is at least 30 mm higher than the upper limit of the normal water level, the boiler feed water returns to the soft water tank 4 through the second feed water bypass; 5) When the gas steam boiler is in abnormal working condition and the economizer 6 is disconnected, and the water level of the drum 1 is within the normal water level range, water is supplied to the boiler through the third water supply pipeline; 6) When the economizer 6 is disconnected under abnormal working conditions of the gas steam boiler, and the water level of the drum 1 is at least 30 mm higher than the upper limit of the normal water level, the boiler feed water returns to the soft water tank 4 through the third feed water bypass; 7) When the condenser 5 and the economizer 6 are disconnected under abnormal working conditions of the gas steam boiler, and the water level of the drum 1 is within the normal water level range, water is supplied to the boiler through the fourth water supply pipeline; 8) When the condenser 5 and the economizer 6 are disconnected under abnormal working conditions of the gas steam boiler, and the water level of the drum 1 is at least 30 mm higher than the upper limit of the normal water level, the boiler feed water returns to the soft water tank 4 through the fourth feed water bypass; The present invention comprises the following groups of circulation pipelines: First water supply pipeline: close the stop valve between the third three-way joint 11 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the soft water tank 4, and at the same time close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or at the same time close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then flows through the condenser 5 and the economizer 6 in sequence and then enters the boiler drum 1; First water supply bypass: The first water supply bypass closes the stop valve between the third three-way joint 11 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the boiler drum 1, and simultaneously closes the stop valves between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or simultaneously closes the stop valves between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and the remaining valves are opened; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and flows through the condenser 5 and the economizer 6 in sequence, and then returns to the soft water tank 4; Second water supply pipeline: close the stop valve between the third three-way joint 11 and the condenser 5, the stop valve between the condenser 5 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the soft water tank 4, and at the same time close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or at the same time close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then flows through the economizer 6 into the boiler drum 1; Second water supply bypass: close the stop valve between the third three-way joint 11 and the condenser 5, the stop valve between the condenser 5 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the boiler drum 1, and simultaneously close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or simultaneously close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then flows through the economizer 6 and returns to the soft water tank 4; Third water supply pipeline: close the stop valve between the third three-way joint 11 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the economizer 6, the stop valve between the economizer 6 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the soft water tank 4, and at the same time close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or at the same time close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then flows through the condenser 5 and enters the boiler drum 1; Third water supply bypass: close the stop valve between the third three-way joint 11 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the economizer 6, the stop valve between the economizer 6 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the boiler drum 1, and at the same time close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or at the same time close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then flows through the condenser 5 and returns to the soft water tank 4; Fourth water supply pipeline: close the stop valve between the third three-way joint 11 and the condenser 5, the stop valve between the condenser 5 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the economizer 6, the stop valve between the economizer 6 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the soft water tank 4, and at the same time close the stop valve between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or at the same time close the stop valve between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and open the other valves; the water in the soft water tank 4 enters the boiler drum 1 after being pressurized by the first water supply pump 9 or the second water supply pump 7; Fourth water supply bypass: The fourth water supply bypass closes the stop valve between the third three-way joint 11 and the condenser 5, the stop valve between the condenser 5 and the fourth three-way joint 12, the stop valve between the fifth three-way joint 13 and the economizer 6, the stop valve between the economizer 6 and the four-way joint 14, and the solenoid valve between the four-way joint 14 and the boiler drum 1, and simultaneously closes the stop valves between the first three-way joint 8 and the first water supply pump 9, between the first water supply pump 9 and the second three-way joint 10, or simultaneously closes the stop valves between the first three-way joint 8 and the second water supply pump 7, between the second water supply pump 7 and the second three-way joint 10, and the remaining valves are opened; the water in the soft water tank 4 is pressurized by the first water supply pump 9 or the second water supply pump 7 and then returns to the soft water tank 4.

[0013] Working principle and process of the present invention: When the condensing gas steam boiler is in high load condition, the boiler feed water volume and evaporation volume are adapted to each other, the boiler water level is in the normal water level range, and the boiler feed water enters the boiler drum after passing through the condenser 5 and the economizer 6; When the condensing gas steam boiler is in a low-load condition, the boiler feed water volume is greater than the evaporation volume, and the boiler water level will continue to rise. When it reaches the high water level, the electrode water level gauge 2 provides a high water level signal, and the boiler controller 3 allows the boiler feed water to return to the soft water tank 4 through the bypass; as the boiler continues to operate, the boiler water level gradually decreases. When it reaches the low water level, the electrode water level gauge 2 provides a low water level signal, and the boiler controller 3 allows the boiler feed water to enter the drum 1.

[0014] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A condensing gas steam boiler water supply system, comprising a boiler drum (1), an electrode water level gauge (2), a boiler controller (3), a soft water tank (4), a condenser (5), an economizer (6), a first feed water pump (9), a second feed water pump (7) and a connecting water pipe; the electrode water level gauge (2) is arranged on the side wall of the boiler drum (1), and the electrode water level gauge (2) is electrically connected to the boiler controller (3); the economizer (6) and the condenser (5) are arranged in sequence along the flow direction of boiler flue gas, characterized in that: The water outlet of the soft water tank (4) is connected to a horizontal interface of the first three-way joint (8) through a connecting water pipe, the other horizontal interface of the first three-way joint (8) is connected to the water inlet of the first water supply pump (9) through a connecting water pipe, the water outlet of the first water supply pump (9) is connected to a horizontal interface of the second three-way joint (10) through a connecting water pipe, the other horizontal interface of the second three-way joint (10) is connected to a horizontal interface of the third three-way joint (11), the other horizontal interface of the third three-way joint (11) is connected to a horizontal interface of the fourth three-way joint (12) through a connecting water pipe, the other horizontal interface of the fourth three-way joint (12) is connected to a horizontal interface of the fifth three-way joint (13) through a connecting water pipe, the other horizontal interface of the fifth three-way joint (13) is connected to a horizontal interface of the four-way joint (14) through a connecting water pipe, and the other horizontal interface of the four-way joint (14) is connected to the water inlet of the soft water tank (4) through a connecting water pipe; The vertical interface of the first three-way joint (8) is connected to the water inlet of the second water supply pump (7) through a connecting water pipe, and the water outlet of the second water supply pump (7) is connected to the vertical interface of the second three-way joint (10) through a connecting water pipe; The vertical interface of the third three-way joint (11) is connected to the water inlet of the condenser (5) through a connecting water pipe, and the water outlet of the condenser (5) is connected to the vertical interface of the fourth three-way joint (12) through a connecting water pipe; the vertical interface of the fifth three-way joint (13) is connected to the water inlet of the economizer (6) through a connecting water pipe, and the water outlet of the economizer (6) is connected to a vertical interface of the four-way joint (14) through a connecting water pipe, and the other vertical interface of the four-way joint (14) is connected to the water inlet of the boiler drum (1) through a connecting water pipe; Shut-off valves are installed on the connecting water pipes between the first three-way joint (8) and the first water supply pump (9), between the first water supply pump (9) and the second three-way joint (10), between the first three-way joint (8) and the second water supply pump (7), between the second water supply pump (7) and the second three-way joint (10), between the third three-way joint (11) and the fourth three-way joint (12), between the third three-way joint (11) and the condenser (5), between the condenser (5) and the fourth three-way joint (12), between the fifth three-way joint (13) and the economizer (6), between the economizer (6) and the four-way joint (14), and between the fifth three-way joint (13) and the four-way joint (14); A solenoid valve is installed on the connecting water pipe between the four-way joint (14) and the soft water tank (4), and a solenoid valve and a check valve are installed on the connecting water pipe between the four-way joint (14) and the boiler drum (1).

2. The method for using a condensing gas steam boiler water supply system according to claim 1, characterized in that: When the gas steam boiler is working normally: 1) When the water level of the boiler drum (1) is within the normal water level range, water is supplied to the boiler through the first water supply pipeline, wherein the first water supply pipeline is: closing the stop valve between the third three-way joint (11) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the soft water tank (4), and simultaneously closing the stop valve between the first three-way joint (8) and the first water supply pump (9), and between the first water supply pump (9) and the second three-way joint (10), or simultaneously closing the stop valve between the first three-way joint (8) and the second water supply pump (7), and between the second water supply pump (7) and the second three-way joint (10), and the remaining valves are opened; the water in the soft water tank (4) is pressurized by the first water supply pump (9) or the second water supply pump (7) and flows through the condenser (5) and the economizer (6) in sequence, and then enters the boiler drum (1); 2) When the water level of the boiler drum (1) exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank (4) through the first feed water bypass. The first feed water bypass is as follows: the stop valve between the third three-way joint (11) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the boiler drum (1) are closed, and the stop valve between the first three-way joint (8) and the first feed water pump (9), between the first feed water pump (9) and the second three-way joint (10) are closed, or the stop valve between the first three-way joint (8) and the second feed water pump (7), between the second feed water pump (7) and the second three-way joint (10) are closed at the same time, and the other valves are opened; the water in the soft water tank (4) is pressurized by the first feed water pump (9) or the second feed water pump (7) and flows through the condenser (5) and the economizer (6) in sequence, and then returns to the soft water tank (4).

3. The method for using a condensing gas steam boiler water supply system according to claim 1, characterized in that: When the gas steam boiler is not working properly, the condenser (5) is disconnected: 1) When the water level of the boiler drum (1) is within the normal water level range, water is supplied to the boiler through the second water supply pipeline, wherein the second water supply pipeline is as follows: the stop valve between the third three-way joint (11) and the condenser (5), the stop valve between the condenser (5) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the soft water tank (4) are closed, and the stop valve between the first three-way joint (8) and the first water supply pump (9), between the first water supply pump (9) and the second three-way joint (10) are closed at the same time, or the stop valve between the first three-way joint (8) and the second water supply pump (7), between the second water supply pump (7) and the second three-way joint (10) are closed at the same time, and the other valves are opened; the water in the soft water tank (4) is pressurized by the first water supply pump (9) or the second water supply pump (7) and flows through the economizer (6) before entering the boiler drum (1); 2) When the water level of the boiler drum (1) exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank (4) through the second feed water bypass. The second feed water bypass is as follows: the stop valve between the third three-way joint (11) and the condenser (5), the stop valve between the condenser (5) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the boiler drum (1) are closed, and the stop valve between the first three-way joint (8) and the first feed water pump (9), between the first feed water pump (9) and the second three-way joint (10) are closed, or the stop valve between the first three-way joint (8) and the second feed water pump (7), between the second feed water pump (7) and the second three-way joint (10) are closed at the same time, and the other valves are opened; the water in the soft water tank (4) is pressurized by the first feed water pump (9) or the second feed water pump (7) and flows through the economizer (6) and then returns to the soft water tank (4).

4. The method for using a condensing gas steam boiler water supply system according to claim 1, characterized in that: When the gas steam boiler is not operating normally, the economizer (6) is disconnected: 1) When the water level of the boiler drum (1) is within the normal water level range, water is supplied to the boiler through the third water supply pipeline, wherein the third water supply pipeline is: closing the stop valve between the third three-way joint (11) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the economizer (6), the stop valve between the economizer (6) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the soft water tank (4); and simultaneously closing the stop valve between the first three-way joint (8) and the first water supply pump (9), between the first water supply pump (9) and the second three-way joint (10), or simultaneously closing the stop valve between the first three-way joint (8) and the second water supply pump (7), between the second water supply pump (7) and the second three-way joint (10), and the remaining valves are opened; the water in the soft water tank (4) is pressurized by the first water supply pump (9) or the second water supply pump (7) and then flows through the condenser (5) and enters the boiler drum (1); 2) When the water level of the boiler drum (1) exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank (4) through the third feed water bypass. The third feed water bypass is as follows: the stop valve between the third three-way joint (11) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the economizer (6), the stop valve between the economizer (6) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the boiler drum (1) are closed, and the stop valve between the first three-way joint (8) and the first feed water pump (9), between the first feed water pump (9) and the second three-way joint (10) or the stop valve between the first three-way joint (8) and the second feed water pump (7), between the second feed water pump (7) and the second three-way joint (10) are closed at the same time, and the other valves are opened; the water in the soft water tank (4) is pressurized by the first feed water pump (9) or the second feed water pump (7) and flows through the condenser (5) and then returns to the soft water tank (4).

5. The method for using a condensing gas steam boiler water supply system according to claim 1, characterized in that: When the gas steam boiler is not working normally, the condenser (5) and the economizer (6) are disconnected: 1) When the water level of the boiler drum (1) is within the normal water level range, water is supplied to the boiler through the fourth water supply pipeline. The fourth water supply pipeline is as follows: the stop valve between the third three-way joint (11) and the condenser (5), the stop valve between the condenser (5) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the economizer (6), the stop valve between the economizer (6) and the four-way joint (14), and the solenoid valve between the four-way joint (14) and the soft water tank (4) are closed, and the stop valve between the first three-way joint (8) and the first water supply pump (9), between the first water supply pump (9) and the second three-way joint (10) are closed at the same time, or the stop valve between the first three-way joint (8) and the second water supply pump (7), between the second water supply pump (7) and the second three-way joint (10) are closed at the same time, and the other valves are opened; the water in the soft water tank (4) enters the boiler drum (1) after being pressurized by the first water supply pump (9) or the second water supply pump (7); 2) When the water level of the boiler drum (1) is in the high water level range and exceeds the upper limit of the normal water level by at least 30 mm, the boiler feed water returns to the soft water tank (4) through the fourth feed water bypass. The fourth feed water bypass is: closing the stop valve between the third three-way joint (11) and the condenser (5), the stop valve between the condenser (5) and the fourth three-way joint (12), the stop valve between the fifth three-way joint (13) and the economizer (6), the stop valve between the economizer (6) and the four-way joint (14), and the four-way joint (15). The solenoid valve between the first water supply pump (4) and the boiler drum (1) is closed, and the stop valves between the first three-way joint (8) and the first water supply pump (9) and between the first water supply pump (9) and the second three-way joint (10) are closed at the same time, or the stop valves between the first three-way joint (8) and the second water supply pump (7) and between the second water supply pump (7) and the second three-way joint (10) are closed at the same time, and the remaining valves are opened; the water in the soft water tank (4) is pressurized by the first water supply pump (9) or the second water supply pump (7) and then returns to the soft water tank (4).

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