Energy-saving boiler process water supply device

Abstract

The utility model discloses an energy-saving boiler process water supply device, and belongs to the technical field of boiler process water supply. The device comprises a water tank, water supply systems are connected to the two sides of the water tank, each water supply system comprises a water conveying pipe connected with the water tank, a water pump is connected to the end, away from the water tank, of the water conveying pipe, the output end of the water pump is connected with a connecting pipe, and the other end of the connecting pipe is connected with an output pipe used for conveying high-pressure water flow for the desulfurization equipment. The device further comprises a communicating pipe used for connecting all the connecting pipes, and communication valves are arranged at the two ends of the communicating pipe. When the device is used, the communication pipes and the communication valves are additionally arranged on the outlet pipelines of the two sets of boiler process water pumps, the communication valves are used for executing communication and isolation of the water pumps, the purpose that one process water pump supplies high-pressure water to the two sets of desulfurization equipment at the same time is achieved, and other unused water pumps can serve as standby water pumps. Therefore, the energy consumption is reduced, and the energy-saving effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a boiler process water supply technical field, especially relates to a boiler process water energy -conserving supply device. BACKGROUND

[0002] Boiler process water supply refers to providing required water quantity and water quality for the boiler system to ensure the safe and efficient operation of the boiler.

[0003] In the present factory, the boiler is arranged in the desulfurization equipment, which is usually used for desulfurization treatment of flue gas during or after combustion to reduce the emission of sulfur dioxide. The process water supply device can supply water to two sets of boilers at the same time, and each set of boiler corresponds to two process water pumps (multistage high-pressure water supply pumps), one for use and one for standby, which share a water outlet main pipe to ensure the safety and stability of production.

[0004] The existing technical scheme has the following disadvantages: during the operation of the two sets of boilers, the desulfurization process water needs to be pressure-regulated by a backwater regulating valve to achieve the appropriate water supply quantity. The present process generally uses two groups of process water pumps to supply water to the two sets of boilers. Because the output water pressure is large, the water pressure needs to be regulated and reduced during output. Moreover, the pressure difference before and after the backwater regulating valve is less than 40%, which causes large energy loss. UTILITY MODEL CONTENTS

[0005] The utility model provides a boiler process water energy -conserving supply device can solve the present process in prior art process water supply process, the present process generally uses two groups of process water pumps to supply water to the two sets of boilers. The water pressure needs to be regulated and reduced during output. Moreover, the pressure difference before and after the backwater regulating valve is less than 40%, which causes large energy loss.

[0006] A boiler process water energy -conserving supply device, including water tank, water tank both sides are connected with water supply system, every group water supply system all includes the water pipe that is connected with water tank, the water pump is connected to the water pipe far away from water tank one end, the water pump output end is connected with the connecting pipe, the other end of connecting pipe is connected with the output pipe for the high pressure water flow that desulfurization equipment transports, and the device further includes the communication pipe for connecting all connecting pipes, both ends of communication pipe are provided with the communication valve.

[0007] As a further scheme of the utility model: every group water supply system is internally provided with two groups of water pumps and two groups of connecting pipes, and the end portions of the two groups of connecting pipes in the same group of water supply system are communicated with the output pipe to form a Y-shaped pipe connection shape.

[0008] As a further scheme of the utility model: the communicating pipe includes three-way shunt pipe and straight pipe, the three-way shunt pipe is fixedly arranged at both ends of the straight pipe, and the two groups of output ends of each group of three-way shunt pipes are connected with two groups of connecting pipes in the same group of water supply systems.

[0009] As a further scheme of the utility model: the communication valve is arranged on the two groups of output pipes of the three-way shunt pipe.

[0010] As a further scheme of the utility model: the adjusting valve is fixedly arranged between the connecting pipe and the water pump output end.

[0011] As a further scheme of the utility model: the water distribution valve is fixedly arranged between the connecting pipe and the output pipe.

[0012] As a further scheme of the utility model: the water distribution valve is fixedly arranged between the connecting pipe and the output pipe.

[0013] As a further scheme of the utility model: the water tank side pipe is connected with the standby water pump, and the water pump output end is connected with the communicating pipe.

[0014] As a further scheme of the utility model: each group of water supply systems is provided with more than three water pumps and more than three connecting pipes, and the connecting pipe end in the same group of water supply systems is connected with the corresponding output pipe.

[0015] As a further scheme of the utility model: the water tank is provided with a liquid level sensor.

[0016] The utility model discloses beneficial effects are as follows:

[0017] 1, the utility model discloses when using, through installing communicating pipe and communication valve on two groups of boiler process water pump outlet pipe, using communication valve to carry out water pump's intercommunication and insulation, when two groups of boiler ultra-low emission equipment are simultaneously operated, using one process water pump output pressure and water supply under the control of each boiler return valve, reaches water supply pressure balance, reaches the purpose that one process water pump simultaneously supplies high pressure water to two sets of desulfurization equipment, and other unused water pump can be used as the standby water pump, thereby reduce the energy consumption, reaches the energy -conserving effect.

[0018] 2, the utility model discloses when using, when one group of water pump has a problem, can open communication valve and make communicating pipe intercommunication, introduce other water pump output process water on the connecting pipe that the water pump has been damaged is connected, thereby being convenient for the maintenance or replacement of the water pump, improve the continuity in the production process. DRAWINGS

[0019] Figure 1The utility model provides a kind of boiler process water energy-saving supply device overall structure schematic diagram;

[0020] Figure 2 The utility model provides a kind of boiler process water energy-saving supply device overall structure schematic diagram;

[0021] Figure 3 The utility model provides a kind of boiler process water energy-saving supply device communication pipe structure schematic diagram.

[0022] Mark explanation:

[0023] 1, water tank;2, water pump;3, connecting pipe;301, regulating valve;302, water distribution valve;4, output pipe;5, communication pipe;501, three-way shunt pipe;502, communication valve;503, straight pipe;6, water delivery pipe;601, water delivery valve. Specific implementation

[0024] The specific implementation of the utility model is described in detail below, but it should be understood that the protection scope of the utility model is not limited by the specific implementation.

[0025] As Figures 1 to 3 Indicated, the utility model embodiment provides a kind of boiler process water energy-saving supply device, including water tank 1, as Figure 1 Indicated, water tank 1 both sides are connected with water supply system, and each group of water supply system includes the water delivery pipe 6 connected with water tank 1, water delivery pipe 6 is connected with water pump 2 at the end away from water tank 1, water pump 2 output end is connected with connecting pipe 3, and the other end of connecting pipe 3 is connected with the output pipe 4 for delivering high-pressure water flow for desulfurization equipment, and the device further includes the communication pipe 5 for connecting all connecting pipe 3, and communication pipe 5 both ends are provided with communication valve 502. When needing to deliver process water for two groups of boilers when using, communication valve 502 can be opened, so that communication pipe 5 is in the communication state, and one group of water pump 2 is opened, water pump 2 is pumped from water tank 1, and is sent into connecting pipe 3, and is shunted to output pipe 4 and communication pipe 5, and the process water in output pipe 4 is directly sent into one group of boiler interior, and the process water in communication pipe 5 will enter another connecting pipe 3 and output pipe 4 along communication pipe 5, to supply water for another group of boilers, and only one group of water pump 2 needs to be opened in the whole process, and other unused water pump 2 can be used as standby water pump 2, and the energy consumption is reduced as a whole. Water tank 1 can be provided with liquid level sensor inside for detecting liquid level.

[0026] In a specific actual example, two groups of water pump 2 and two groups of connecting pipe 3 are provided inside each group of water supply system, wherein one group of water pump 2 is main pump, and another group is standby pump. The end of two groups of connecting pipe 3 in the same group of water supply system is communicated with output pipe 4, and constitutes Y-shaped pipe connection shape, as Figure 1As shown, so that two groups of water pump 2 can be output to the inside of the output pipe 4 high pressure water flow. The communication pipe 5 includes a three-way pipe 501 and a straight pipe 503, the three-way pipe 501 is fixedly arranged at both ends of the straight pipe 503, and the two groups of output ends of each group of three-way pipe 501 are connected with the two groups of connecting pipes 3 inside the same group of water supply system, such as Figure 2 As shown, so that the water inside each group of connecting pipe 3 can flow to the three-way pipe 501, or the water flow inside the three-way pipe 501 flows to the inside of the corresponding connecting pipe 3. The communication valve 502 is arranged on the two groups of output channels of the three-way pipe 501, which is used to realize the channel selection passability of the three-way pipe 501.

[0027] Further, the connecting pipe 3 and the output end of the water pump 2 are fixedly provided with an adjusting valve 301, which is used to prevent the high pressure water flow in the connecting pipe 3 from flowing back to the inside of the connected water pump 2, affecting the performance of the water pump 2. The connecting pipe 3 and the output pipe 4 are fixedly provided with a water distribution valve 302, which can be used to control the through state of the passage of the connecting pipe 3. The output pipe 4 is fixedly provided with a water delivery valve 601, which is used to cut off the passage between the water pump 2 and the water tank 1, facilitating the subsequent disassembly and maintenance of the water pump 2 or the water tank 1.

[0028] In another embodiment, the water tank 1 is provided with a water pump 2 on both sides for direct output, and a standby water pump 2 is connected to the pipeline on one side of the water tank 1. That is, a total of three groups of water pumps 2 are arranged, two groups of which are used as main water pumps 2, and one group of water pump 2 is used as a standby water pump 2. When one group of main water pump 2 is damaged, the standby water pump 2 can be started to inject water into the corresponding connecting pipe 3 through the communication pipe 5, ensuring the stability of the whole work. Compared with the traditional arrangement of one main and one standby water pump 2 for each boiler, the investment cost is saved.

[0029] In another embodiment, three or more groups of water pumps 2 and three or more groups of connecting pipes 3 are arranged inside each group of water supply system, and the ends of all connecting pipes 3 in the same group of water supply system are connected with the corresponding output pipe 4. In this embodiment, each group of output pipe 4 is connected with a group of boiler. Since all connecting pipes 3 can be connected through the communication pipe 5, all water pumps 2 can be used as main water pumps 2 or standby water pumps 2, or multiple water pumps 2 are started in circulation, prolonging the service life of a single water pump 2, while ensuring the stability of the whole working process.

[0030] The principle of the communicating vessel is used, a communicating pipe 5 and a communication valve 502 are installed on the outlet pipe of two sets of boiler process water pumps 2, and the communication valve 502 is used to realize the intercommunication and isolation of the water pump 2. When the two sets of boiler ultra-low emission equipment are simultaneously operated, the output pressure and water supply amount of one process water pump 2 are controlled by the backwater regulating valve in each boiler, so that the water supply pressure is balanced, one process water pump 2 simultaneously supplies high-pressure water to two sets of desulfurization equipment, and the other unused water pump 2 can be used as a standby water pump 2, thereby reducing energy consumption and achieving the effect of energy saving.

[0031] The outlet flow of a single process water pump 2 is 8 m 3 / h, the head is 4.0 MPa, and the normal operation demand flow of the desulfurization spray gun is approximately 3 m 3 / h, before the transformation, two process water pumps 2 were needed to operate during the simultaneous operation of the two sets of equipment, and the power consumption was 90 kw.h.

[0032] After the transformation, one process water pump 2 can simultaneously supply water to two sets of ultra-low emission equipment, which can still meet the production demand, save one high-pressure water pump 2 motor (45 KW) running power consumption, and further improve the running safety by increasing multiple standby water pumps 2 on a single set of equipment. According to the calculation of two sets of boilers operating for six months, the annual power saving amount reaches 195,000 kw.h, and the operation cost is reduced by nearly 100,000 yuan / year.

[0033] Working principle: when water is needed for two sets of boilers, the adjusting valve 301 and the water distribution valve 302 on the connecting pipe 3 connected to the output end of one set of water pump 2 are opened, the process water output by the water pump 2 enters the output pipe 4 through the water distribution valve 302, and the water supply operation for one set of boiler is realized. At the same time, the communication valves 502 at both ends of the communicating pipe 5 are opened, so that the process water output by the water pump 2 can enter the other water supply system through the communicating pipe 5, the water distribution valve 302 on the corresponding connecting pipe 3 is opened, the process water can enter the corresponding output pipe 4 through the connecting pipe 3, and then flows into the corresponding boiler through the output pipe 4, that is, the water supply operation for two sets of boilers is realized.

[0034] The principle of the communicating vessel is used, a communicating pipe 5 and a communication valve 502 are installed on the outlet pipe of two sets of boiler process water pumps 2, and the communication valve 502 is used to realize the intercommunication and isolation of the water pump 2. When the two sets of boiler ultra-low emission equipment are simultaneously operated, the output pressure and water supply amount of one process water pump 2 are controlled by the backwater regulating valve in each boiler, so that the water supply pressure is balanced, one process water pump 2 simultaneously supplies high-pressure water to two sets of desulfurization equipment, and the other unused water pump 2 can be used as a standby water pump 2, thereby reducing energy consumption and achieving the effect of energy saving.

[0035] When one of the water pumps 2 is in trouble, the communication valve 502 is opened to make the communication pipes 5 communicate with each other, and the process water output by other water pumps 2 is introduced into the communication pipe 3 connected to the water pump 2 in trouble, so that the water pump 2 in trouble can be repaired or replaced, and the continuity in the production process is improved.

[0036] The above disclosed are only several specific embodiments of the present application, but the embodiments of the present application are not limited to this, and any changes that can be thought of by those skilled in the art shall fall into the protection scope of the present application.

Claims

1. A boiler process water energy-saving supply device, comprising a water tank (1), water supply systems are connected to both sides of the water tank (1), each group of the water supply systems comprises a water delivery pipe (6) connected to the water tank (1), one end of the water delivery pipe (6) away from the water tank (1) is connected with a water pump (2), an output end of the water pump (2) is connected with a connecting pipe (3), the other end of the connecting pipe (3) is connected with an output pipe (4) for delivering high-pressure water flow to a desulfurization equipment, characterized in that, The device also comprises a communication pipe (5) for connecting all the connecting pipes (3), and the communication pipe (5) is provided with a communication valve (502) at both ends.

2. A boiler process water energy supply device according to claim 1, characterized in that, Each group of the water supply system is internally provided with two groups of water pumps (2) and two groups of connecting pipes (3), and the two groups of connecting pipes (3) in the same group of water supply system are connected with the output pipes (4) at the end, forming a Y-shaped pipe connection shape.

3. A boiler process water economizer apparatus as claimed in claim 2, wherein, The communication pipe (5) comprises a three-way shunt pipe (501) and a straight pipe (503), and the three-way shunt pipe (501) is fixedly arranged at both ends of the straight pipe (503), and the two groups of output ends of each group of the three-way shunt pipe (501) are communicated with the two groups of connecting pipes (3) inside the same group of water supply system.

4. A boiler process water economizer apparatus as claimed in claim 3, wherein, The communication valve (502) is arranged on the two groups of output pipes (4) of the three-way shunt pipe (501).

5. A boiler process water economizer apparatus as claimed in claim 4, wherein, The connecting pipe (3) and the output end of the water pump (2) are fixedly provided with an adjusting valve (301).

6. A boiler process water economizer apparatus as claimed in claim 4, wherein, The connecting pipe (3) and the output pipe (4) are fixedly provided with a water distribution valve (302).

7. A boiler process water economizer apparatus as claimed in claim 1, wherein, The output pipe (4) is fixedly provided with a water delivery valve (601).

8. A boiler process water economizer apparatus as claimed in claim 1, wherein, The water tank (1) is connected with a standby water pump (2) on one side, and the output end of the water pump (2) is connected with the communication pipe (5).

9. A boiler process water economizer apparatus as claimed in claim 1, wherein, Each group of the water supply system is internally provided with more than three groups of water pumps (2) and more than three groups of connecting pipes (3), and the end of all the connecting pipes (3) in the same group of water supply system is connected with the corresponding output pipe (4).

10. A boiler process water economizer apparatus as claimed in claim 1, wherein, The water tank (1) is internally provided with a liquid level sensor.

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