CN212777303U

CN212777303U - Gas boiler flue gas condensate water recycle system

Info

Publication number: CN212777303U
Application number: CN202020991515.3U
Authority: CN
Inventors: 顾钦杰; 杨峰; 邹健
Original assignee: Zhejiang Liju Energy Saving Service Co ltd
Current assignee: Zhejiang Liju Energy Saving Service Co ltd
Priority date: 2020-06-03
Filing date: 2020-06-03
Publication date: 2021-03-23
Anticipated expiration: 2030-06-03

Abstract

The utility model belongs to the technical field of boiler equipment, in particular to a gas boiler flue gas condensate water recycling system, which comprises a flue gas condenser, a condenser pipe, a water tank and a dosing machine; the flue gas condenser is positioned in a chimney of the gas boiler, one end of the condensing pipe is communicated with the chimney, and the other end of the condensing pipe is positioned above the water tank; a PH sensor is arranged in the water tank, and an electric valve matched with the PH sensor is arranged on a pipeline between the dosing machine and the water tank. The utility model discloses can collect the flue gas comdenstion water effectively to can adjust the pH valve of flue gas comdenstion water to boiler water standard in a flexible way.

Description

Gas boiler flue gas condensate water recycle system

Technical Field

The utility model belongs to the technical field of boiler equipment, concretely relates to gas boiler flue gas comdenstion water recycle system.

Background

The main component of the fuel gas is methane, and a natural gas boiler generates a large amount of water vapor in the combustion process. With the development and upgrading of boiler energy-saving and emission-reducing technology in recent years, the exhaust gas temperature of the boiler is lower and lower, the energy efficiency is higher and higher, and the energy of steam generated by combustion is recovered to generate a large amount of condensed water. Softened water is required to be supplemented to a common boiler system, and if condensed water generated by flue gas is recycled and supplemented into the boiler system, waste in pollution discharge can be reduced, and water supplement of the boiler can also be reduced. However, the flue gas condensate water is easy to contact with carbon dioxide in the atmosphere, so that the condensate water is acidic and can corrode a boiler and a pipeline when being directly supplemented to enter a boiler system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problem that the flue gas condensate water can not be directly supplemented into the boiler in the prior art, providing a gas boiler flue gas condensate water recycling system.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a gas boiler flue gas condensate water recycling system comprises a flue gas condenser, a condenser pipe, a water tank and a dosing machine; the flue gas condenser is positioned in a chimney of the gas boiler, one end of the condensing pipe is communicated with the chimney, and the other end of the condensing pipe is positioned above the water tank; a PH sensor is arranged in the water tank, and an electric valve matched with the PH sensor is arranged on a pipeline between the dosing machine and the water tank.

Further, the flue gas condenser comprises a coil pipe, a water distribution pipe and a water collection pipe; the water distribution pipe and the water collection pipe extend out of the chimney; the coil pipe is a planar structure formed by bidirectional coiling; the inlet and the outlet of the coil pipe are respectively positioned at two sides of the coil pipe and are respectively connected with the water distribution pipe and the water collection pipe; the flow direction of the flue gas in the chimney is opposite to the overall flow direction of the water flow in the flue gas condenser.

Furthermore, the number of the coil pipes of the flue gas condenser is multiple, and the coil pipes are arranged in parallel along the length direction of the chimney.

Furthermore, the condensation pipe is provided with an S-shaped water seal.

Furthermore, the bottom of the water tank is provided with a motor, a rotating shaft of the motor is connected with a stirring shaft extending into the water tank, and the stirring shaft is provided with a plurality of stirring blades along the length direction.

Furthermore, an overflow port is arranged at the top of the water tank and connected with an overflow pipe.

Furthermore, the bottom of the water tank is provided with a drain outlet which is connected with a drain pipe.

Further, still include the filter, the pipeline between water tank and the filter is equipped with first water pump.

Further, still include the oxygen-eliminating device, the pipeline between filter and the oxygen-eliminating device is equipped with the second water pump.

Furthermore, a third water pump is arranged on a pipeline connected with an outlet of the deaerator, and the flue gas condensate water is input into the boiler through the third water pump.

Compared with the prior art, the utility model has the beneficial technical effects that:

(1) the utility model can effectively collect the flue gas condensate water, and can flexibly adjust the pH value of the flue gas condensate water to the boiler water standard;

(2) the utility model discloses the comdenstion water in the chimney is under the effect of gravity, in the condenser pipe fell into the water tank automatically, can also avoid the flue gas to flow out from the condenser pipe simultaneously.

Drawings

FIG. 1 is a diagram of a system for recycling condensed water from flue gas of a gas boiler according to an embodiment of the present invention;

FIG. 2 is a structural diagram of a flue gas condenser of the present embodiment;

fig. 3 is a structural diagram of the coil of the present embodiment.

In the figure, a chimney 1, a condenser pipe 2, a water seal 3, a flue gas condenser 4, a water tank 5, a pH sensor 6, an electric valve 7, a coil pipe 8, a water dividing pipe 9, a water collecting pipe 10, a motor 11, a stirring shaft 12, a stirring blade 13, a dosing machine 14, a filter 15, a deaerator 16, a first water pump 17, a second water pump 18, a third water pump 19, an overflow port 20, an overflow pipe 21, a discharge port 22 and a discharge pipe 23 are arranged.

Detailed Description

The invention will be further described with reference to specific examples, but the scope of the invention is not limited thereto.

As shown in fig. 1-3, the flue gas condensate water recycling system of the gas boiler of the present embodiment includes a flue gas condenser 4, a condenser pipe 2, a water tank 5 and a dosing machine 14. The flue gas condenser 4 is positioned in a chimney 1 of the gas boiler, one end of the condenser pipe 2 is communicated with the chimney 1, and the other end of the condenser pipe is positioned above the water tank 5 and is not contacted with the liquid level of the water tank 5. The flue gas condenser 4 can fully separate out condensed water in the flue gas. The condensed water in the chimney 1 enters the condensation pipe 2 and automatically drops into the water tank 5 under the action of gravity. A PH sensor 6 is arranged in the water tank 5, and an electric valve 7 matched with the PH sensor 6 is arranged on a pipeline between the dosing machine 14 and the water tank 5. When the pH sensor 6 detects that the pH of the condensed water in the water tank 5 is below 7, a dosing pump of a dosing machine is automatically opened, and the electric valve 7 is opened at the same time. The lower the ph of the condensed water in the water tank 5 is, the higher the opening frequency of the dosing pump is, and the larger the opening degree of the electric valve 7 is. And stopping adding the chemicals when the pH of the condensed water in the water tank 5 reaches 8. Therefore, this embodiment can collect the flue gas comdenstion water effectively through flue gas condenser 4 to detect recycle's comdenstion water through PH sensor 6, rethread testing result control dosing machine and motorised valve 7 adjust the boiler water standard with the flue gas comdenstion water.

The flue gas condenser 4 comprises a coil pipe 8, a water distribution pipe 9 and a water collection pipe 10. The water distribution pipe 9 and the water collection pipe 10 extend out of the chimney 1. In order to increase the length of the coil pipe 8, the coil pipe 8 is a planar structure formed by two-way coiling, and is coiled clockwise from outside to inside and then coiled anticlockwise from inside to outside; or, the coil pipe 8 is coiled counterclockwise from outside to inside and then coiled clockwise from inside to outside. The inlet and the outlet of the coil pipe 8 are respectively positioned at two sides of the coil pipe 8 and are respectively connected with the water distribution pipe 9 and the water collection pipe 10. The flow direction of the flue gas in the chimney 1 is opposite to the overall flow direction of the water flow in the flue gas condenser 4. The number of the coil pipes 8 of the flue gas condenser 4 is multiple, and the multiple coil pipes 8 are arranged along the length direction of the chimney 1 and are mutually connected in parallel. The water distribution pipe 9, the coil pipe 8 and the water collection pipe 10 are connected in sequence to form a water flow channel. The area of the stack 1 excluding the flue gas condenser 4 constitutes a flue gas channel. The flue gas in the flue gas channel exchanges heat with the water solution in the water flow channel. The flue gas with reduced temperature is discharged from the stack 1. The water temperature rises and is discharged from the water collecting pipe 10.

In order to prevent the flue gas in the chimney 1 from flowing out of the condensation pipe 2, the condensation pipe 2 is provided with an S-shaped water seal 3. The S-shaped water seal 3 can ensure that the flue gas condensate water smoothly flows into the water tank 5 and can prevent the flue gas from entering the room from the condensation pipe 2. In order to ensure that the medicine added into the water tank 5 can be uniformly dispersed, the bottom of the water tank 5 is provided with a motor 11, the rotating shaft of the motor 11 is connected with a stirring shaft 12 extending into the water tank 5, and the stirring shaft 12 is provided with a plurality of stirring blades 13 along the length direction thereof. The motor 11 drives the stirring shaft 12, and the stirring shaft 12 drives the stirring blade 13 to stir the condensed water in the water tank 5.

In order to avoid the overflow of the condensed water of the flue gas from the water tank 5, the top of the water tank 5 is provided with an overflow port 20, and the overflow port 20 is connected with an overflow pipe 21. In order to facilitate cleaning of the water tank 5, a drain opening 22 is provided at the bottom of the water tank 5, and a drain pipe 23 is connected to the drain opening 22. The overflow pipe 21 is communicated with the floor drain after being converged with the drainage pipe 23. In order to filter the condensed water of the flue gas, the embodiment further includes a filter 15, and a first water pump 17 is arranged in the pipeline between the water tank 5 and the filter 15. In order to remove oxygen in the flue gas condensed water, the embodiment further comprises a deaerator 16, and a second water pump 18 is arranged in a pipeline between the filter 15 and the deaerator 16. And a pipeline connected with an outlet of the deaerator 16 is provided with a third water pump 19, and the flue gas condensate water is input into the boiler through the third water pump 19.

The embodiments of the present invention have been described in detail, and those skilled in the art can easily understand that there are various changes in the embodiments according to the idea of the present invention, and such changes should be considered as the protection scope of the present invention.

Claims

1. The utility model provides a gas boiler flue gas comdenstion water recycle system which characterized in that:

comprises a flue gas condenser, a condenser pipe, a water tank and a dosing machine;

the flue gas condenser is positioned in a chimney of the gas boiler, one end of the condensing pipe is communicated with the chimney, and the other end of the condensing pipe is positioned above the water tank; a PH sensor is arranged in the water tank, and an electric valve matched with the PH sensor is arranged on a pipeline between the dosing machine and the water tank.

2. The gas boiler flue gas condensate water recycling system of claim 1, characterized in that:

the flue gas condenser comprises a coil pipe, a water distribution pipe and a water collection pipe; the water distribution pipe and the water collection pipe extend out of the chimney; the coil pipe is a planar structure formed by bidirectional coiling;

the inlet and the outlet of the coil pipe are respectively positioned at two sides of the coil pipe and are respectively connected with the water distribution pipe and the water collection pipe; the flow direction of the flue gas in the chimney is opposite to the overall flow direction of the water flow in the flue gas condenser.

3. The gas boiler flue gas condensate water recycling system of claim 2, characterized in that: the number of the coil pipes of the flue gas condenser is multiple, and the plurality of coil pipes are arranged in parallel along the length direction of the chimney.

4. The gas boiler flue gas condensate water recycling system of claim 1, characterized in that: the condensation pipe is provided with an S-shaped water seal.

5. The gas boiler flue gas condensate water recycling system of claim 1, characterized in that: the bottom of water tank is equipped with the motor, and motor shaft is connected with the agitator shaft that stretches into in the water tank, and the (mixing) shaft is equipped with the several stirring leaf along its length direction.

6. The gas boiler flue gas condensate water recycling system of claim 1 or 5, characterized in that: the top of the water tank is provided with an overflow port which is connected with an overflow pipe.

7. The gas boiler flue gas condensate water recycling system of claim 1 or 5, characterized in that: the bottom of the water tank is provided with a drain outlet which is connected with a drain pipe.

8. The gas boiler flue gas condensate water recycling system of claim 1, characterized in that: still include the filter, the pipeline between water tank and the filter is equipped with first water pump.

9. The gas boiler flue gas condensate water recycling system of claim 8, wherein: still include the oxygen-eliminating device, the pipeline between filter and the oxygen-eliminating device is equipped with the second water pump.

10. The gas boiler flue gas condensate water recycling system of claim 9, characterized in that: and a pipeline connected with an outlet of the deaerator is provided with a third water pump, and the flue gas condensate water is input into the boiler through the third water pump.