Return water recycling equipment for gas-fired boiler

Abstract

The utility model relates to a gas boiler return water recycling device which comprises a boiler, a drain valve and a condensation tank, the outlet end of the boiler is communicated with a papermaking production line through a pipeline, the papermaking production line is communicated with the inlet end of the drain valve through a first conveying pipeline, and the inlet end of the drain valve is provided with a steam exhaust pipeline and a return water pipeline in a split-flow mode. Steam from the boiler is conveyed to a papermaking production line to provide a heat source; condensate water or a steam-water mixture from a papermaking production line is shunted by the drain valve through the first conveying pipeline, and the condensate water is conveyed to the boiler through the water return pipeline to be recycled; meanwhile, the steam-water mixture is conveyed to the condensation tank for condensation through the steam exhaust pipeline and then conveyed to the boiler for recycling through the condensate water pipeline, efficient recycling of condensate water or the steam-water mixture can be achieved, and the recycling rate of heat resources is increased.

Description

Technical Field

[0001] This utility model relates to the field of boiler return water recycling technology, and in particular to a gas-fired boiler return water recycling device. Background Technology

[0002] Currently, paper production lines rely on high-temperature steam generated by gas-fired boilers as a heat source. After heat exchange, the saturated steam becomes condensate or a steam-water mixture. However, due to the large volume of steam used, directly discharging the resulting condensate or mixture would lead to a significant waste of water resources, necessitating water recycling. Existing gas-fired boiler water recycling systems typically return the condensate from the paper production line to the boiler via pipelines, but the steam-water mixture is directly discharged to the outside. This requires continuous water replenishment to the boiler, increasing water consumption and consuming large amounts of coal or natural gas, thus easily wasting heat resources. Utility Model Content

[0003] The purpose of this invention is to design a gas-fired boiler water recycling device that can efficiently recycle condensate and steam-water mixtures, thereby improving the heat resource recovery rate and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A gas-fired boiler water recycling device is provided, comprising a boiler, a steam trap, and a condensate tank. The outlet end of the boiler is connected to a paper production line via a pipeline. The paper production line is connected to the inlet end of the steam trap via a first conveying pipeline. The inlet end of the steam trap is divided into an exhaust pipe and a return water pipe. The exhaust pipe is connected to the inlet end of the condensate tank. The outlet end of the condensate tank is connected to the inlet end of the boiler via a condensate water pipe. The return water pipe is connected to the condensate water pipe.

[0006] Furthermore, a shut-off valve is installed on the exhaust pipe.

[0007] Furthermore, a buffer tank is installed on the condensate pipe.

[0008] Furthermore, a water pump is installed on the condensate pipe between the boiler and the buffer tank.

[0009] Furthermore, the condenser includes a tank body, the outer wall of which is provided with a condensation jacket, a steam inlet is provided at the top of the tank body and is connected to the exhaust pipe; a condensate outlet is provided at the bottom of the tank body and is connected to the condensate pipe.

[0010] Furthermore, a flow-slowing assembly is installed inside the tank. The flow-slowing assembly includes an upper fixed plate, a lower fixed plate, a plurality of first flow-slowing plates, and a plurality of second flow-slowing plates. The upper fixed plate is installed on the top of the tank, the plurality of first flow-slowing plates are installed on the upper fixed plate, the lower fixed plate is installed on the bottom of the tank, and the plurality of second flow-slowing plates are installed on the lower fixed plate. The plurality of first flow-slowing plates and the plurality of second flow-slowing plates are arranged alternately.

[0011] Furthermore, the lower fixing plate has multiple through holes.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In use, steam from the boiler is delivered to the paper production line to provide a heat source; condensate or steam-water mixture from the paper production line is diverted through a first conveying pipe and a drain valve, and the condensate is delivered to the boiler for recycling through a return water pipe; at the same time, the steam-water mixture is delivered to the condenser tank for condensation through the exhaust pipe, and then delivered to the boiler for recycling through the condensate pipe, which can achieve efficient recycling of condensate or steam-water mixture and improve the heat resource recovery rate. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the condenser of this utility model.

[0017] The names of the components shown in the diagram are as follows:

[0018] 1. Boiler; 2. Steam trap; 3. Condensate tank; 4. First conveying pipeline; 5. Exhaust steam pipeline; 6. Return water pipeline; 7. Shut-off valve; 8. Buffer tank; 9. Water pump; 10. Tank body; 11. Condensate jacket; 12. Steam inlet; 13. Condensate outlet; 14. Upper fixed plate; 15. Lower fixed plate; 16. First flow buffer plate; 17. Second flow buffer plate; 18. Through hole; 19. Paper production line; 20. Condensate pipeline. Detailed Implementation

[0019] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided below.

[0020] Example: Please refer to Figure 1-2 A gas-fired boiler water recycling device includes a boiler 1, a steam trap 2, and a condensate tank 3. The outlet of the boiler 1 is connected to a paper production line 19 via a pipeline. The paper production line 19 is connected to the inlet of the steam trap 2 via a first conveying pipeline 4. The inlet of the steam trap 2 is divided into an exhaust pipe 5 and a return water pipe 6. The exhaust pipe 5 is connected to the inlet of the condensate tank 3 and a shut-off valve 7 is installed on the exhaust pipe 5. The outlet of the condensate tank 3 is connected to the inlet of the boiler 1 via a condensate water pipe 20, and the return water pipe 6 is connected to the condensate water pipe 20. Steam from the boiler 1 is delivered to the paper production line 19 to provide a heat source. Condensate or steam-water mixture from the paper production line 19 is diverted through the first conveying pipeline 4 and the steam trap 2. The condensate is delivered to the boiler 1 for recycling via the return water pipe 6. At the same time, the steam-water mixture is delivered to the condensate tank 3 for condensation via the exhaust pipe 5, and then delivered to the boiler 1 for recycling via the condensate water pipe 20. This device can achieve efficient recycling of condensate or steam-water mixture and improve the heat resource recovery rate. A buffer tank 8 is installed on the condensate pipe 20. The buffer tank 8 is equipped with a level gauge to detect the water level in the buffer tank 8. A water pump 9 is installed on the condensate pipe 20 between the boiler 1 and the buffer tank 8. The condensate from the paper production line 19 or the condensate after passing through the condensate tank 3 can be stored in the buffer tank 8. After reaching a certain level, it is transported to the boiler 1 by the water pump 9. The buffer tank 8 can adjust the temperature and pressure of the condensate in the buffer tank 8 to make them consistent and not affect the inside of the boiler 1.

[0021] The condenser 3 includes a tank body 10, with a condensation jacket 11 on the outer wall of the tank body 10, where cold water circulates. A steam inlet 12 is located at the top of the tank body 10, connected to an exhaust pipe 5; a condensate outlet 13 is located at the bottom of the tank body 10, connected to a condensate pipe 20. A flow-regulating assembly is installed inside the tank body 10, comprising an upper fixed plate 14, a lower fixed plate 15, multiple first flow-regulating plates 16, and multiple second flow-regulating plates 17. The upper fixed plate 14 is installed at the top of the tank body 10, the multiple first flow-regulating plates 16 are installed on the upper fixed plate 14, the lower fixed plate 15 is installed at the bottom of the tank body 10, and the multiple second flow-regulating plates 17 are installed on the lower fixed plate 15. The multiple first flow-regulating plates 16 and multiple second flow-regulating plates 17 are staggered, thus extending the residence time of the steam-water mixture in the condenser 3, allowing for thorough condensation. The lower fixed plate 15 has multiple through holes 18, and the condensate produced after the steam-water mixture condenses can flow out to the bottom of the condenser tank 3 through the through holes 18.

[0022] The working principle of this embodiment is as follows: Steam from boiler 1 is delivered to paper production line 19 to provide a heat source; condensate or steam-water mixture from paper production line 19 is diverted through first conveying pipe 4 and drain valve 2. The condensate is delivered to buffer tank 8 for storage through return water pipe 6; at the same time, the steam-water mixture is delivered to condensate tank 3 through exhaust pipe 5, flows between multiple first flow buffers 16 and multiple second flow buffers 17 for condensation, and then is delivered to buffer tank 8 for storage through condensate pipe 20, and then delivered to boiler 1 for recycling. This is how it works.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "upper," "lower," "left," "right," "front," "back," and similar expressions used in this document are for illustrative purposes only.

[0024] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A gas-fired boiler water recycling device, characterized in that: The system includes a boiler (1), a steam trap (2), and a condenser (3). The outlet of the boiler (1) is connected to a paper production line (19) via a pipeline. The paper production line (19) is connected to the inlet of the steam trap (2) via a first conveying pipeline (4). The inlet of the steam trap (2) is divided into an exhaust pipe (5) and a return water pipe (6). The exhaust pipe (5) is connected to the inlet of the condenser (3). The outlet of the condenser (3) is connected to the inlet of the boiler (1) via a condensate pipe (20). The return water pipe (6) is connected to the condensate pipe (20).

2. The gas-fired boiler water recycling equipment according to claim 1, characterized in that: A shut-off valve (7) is installed on the exhaust pipe (5).

3. The gas-fired boiler water recycling equipment according to claim 1, characterized in that: A buffer tank (8) is installed on the condensate pipe (20).

4. The gas-fired boiler water recycling equipment according to claim 3, characterized in that: A water pump (9) is installed on the condensate pipe (20) between the boiler (1) and the buffer tank (8).

5. The gas-fired boiler water recycling equipment according to claim 1, characterized in that: The condenser (3) includes a tank body (10), the outer wall of the tank body (10) is provided with a condensation jacket (11), the top of the tank body (10) is provided with a steam inlet (12), the steam inlet (12) is connected to the exhaust pipe (5); the bottom of the tank body (10) is provided with a condensate outlet (13), the condensate outlet (13) is connected to the condensate pipe (20).

6. The gas-fired boiler water recycling equipment according to claim 5, characterized in that: The tank (10) is equipped with a flow-slowing assembly, which includes an upper fixed plate (14), a lower fixed plate (15), a plurality of first flow-slowing plates (16) and a plurality of second flow-slowing plates (17). The upper fixed plate (14) is installed on the top of the tank (10), the plurality of first flow-slowing plates (16) are installed on the upper fixed plate (14), the lower fixed plate (15) is installed on the bottom of the tank (10), and the plurality of second flow-slowing plates (17) are installed on the lower fixed plate (15). The plurality of first flow-slowing plates (16) and the plurality of second flow-slowing plates (17) are arranged alternately.

7. The gas-fired boiler water recycling equipment according to claim 6, characterized in that: The lower fixing plate (15) has multiple through holes (18).

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