Tail water seal for gas-fired hot water boiler

Abstract

The utility model relates to the technical field of boilers, in particular to a tail water seal for a gas-fired hot water boiler, which comprises a flow guide pipe, the flow guide pipe comprises a water inlet end, a first U-shaped bend, a second U-shaped bend and a water outlet end, the water inlet end of the flow guide pipe is fixedly connected inside a hearth, and the second U-shaped bend of the flow guide pipe is fixedly connected with a water seal tank. The side, away from the flow guide pipe, of the water-sealed tank is fixedly connected with an overflow opening, the lower portion of the overflow opening is fixedly connected with a water volume marking line, and according to the communicating vessel liquid level leveling principle, condensate water guided out of the hearth is directly guided into the water-sealed tank after passing through the first U-shaped bend and the second U-shaped bend through the flow guide pipe. The water surface height reaches the water volume marking line, the condensate water guided into the water-sealed tank raises the water surface, the water volume in the water-sealed tank reaches the overflow port, and the excessive water flows out of the overflow port, so that the water-sealed tank has the effect of quickly discharging the condensate water flowing out of the heating surface at the tail part of the boiler.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a tail water seal for a gas hot water boiler. Background Art

[0002] When the water vapor in the flue gas of a gas hot water boiler condenses into water below the dew point temperature, the boiler has a high thermal efficiency and a low flue gas discharge temperature. When the boiler is operating at the rated load, the flue gas discharge temperature is slightly higher than the dew point temperature of the flue gas, and it can operate economically and safely. However, when the boiler operates at a low load for a long time, the flue gas temperature is lower than the dew point temperature of the flue gas. At this time, condensed water will flow out from the tail heating surface of the boiler and be discharged from the boiler through the rear smoke box. Most of the existing boilers do not have a special mechanism for discharging this condensed water, and it is possible that the formation rate of the condensed water is greater than the discharge rate, resulting in low heating efficiency of the boiler and waste of fuel resources. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] In view of the deficiencies of the prior art, the utility model provides a tail water seal for a gas hot water boiler, which solves the technical problem that the condensed water flowing out from the tail heating surface of the existing boiler is not easy to be discharged in time.

[0005] (2) Technical Solutions

[0006] To achieve the above objectives, the utility model is realized through the following technical solutions:

[0007] A tail water seal for a gas hot water boiler includes a diversion pipe, which includes a water inlet end, a first U-shaped bend, a second U-shaped bend and a water outlet end. The water inlet end of the diversion pipe is fixedly connected to the inside of the furnace. The second U-shaped bend of the diversion pipe is fixedly connected to a water seal tank. An overflow port is fixedly connected to the side of the water seal tank away from the diversion pipe, and a water volume scale line is fixedly connected below the overflow port.

[0008] Preferably, the water inlet end of the diversion pipe and the vertex of the second U-shaped bend are at the same horizontal height.

[0009] Preferably, the water volume scale line is flush with the bottom of the water inlet of the overflow port.

[0010] Preferably, the water volume scale line is flush with the highest point of the second U-shaped bend of the diversion pipe.

[0011] Preferably, the water seal tank is filled with water, and the water surface height is flush with the water volume scale line.

[0012] Preferably, the water outlet end of the diversion pipe extends into the water body loaded in the water seal tank.

[0013] (3) Beneficial Effects

[0014] 1. According to the principle of equal liquid levels in a communicating vessel, the condensate water led out from the interior of the furnace by the diversion pipe passes through the first U-shaped bend and the second U-shaped bend and is directly introduced into the water seal tank. Since water has already been added to the water seal tank and the water level reaches the water volume marking line, the introduced condensate water raises the water level. When the water volume in the water seal tank reaches the overflow port, the excess water flows out from the overflow port, enabling this application to have the effect of quickly discharging the condensate water flowing out from the heating surface at the tail of the boiler.

[0015] 2. Installing a water seal at the tail of the boiler can not only ensure the internal pressure of the boiler, prevent the carbon dioxide gas in the flue gas in the furnace from escaping, and ensure the normal operation of the boiler, but also ensure that the condensate water in the furnace overflows to the outside of the furnace, avoiding the corrosion of the water-cooled wall tubes in the furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above description is only an overview of the technical solution of the present utility model. In order to understand the technical means of the present utility model more clearly and implement it according to the content of the specification, the following describes in detail with reference to the preferred embodiments of the present utility model and the accompanying drawings.

[0017] Figure 1 It is a side view structure diagram of the whole device of the present utility model;

[0018] Figure 2 It is a partial sectional structure diagram of the device of the present utility model;

[0019] Figure 3 It is a top view structure diagram of the water seal tank of the present utility model.

[0020] Legend description: 1. Diversion pipe; 2. Water seal tank; 3. Overflow port; 4. Water volume marking line; 101. Inlet end; 102. First U-shaped bend; 103. Second U-shaped bend; 104. Outlet end. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The embodiment of this application provides a tail water seal for a gas hot water boiler, effectively solving the problem that the condensate water flowing out from the heating surface at the tail of the existing boiler is not easily discharged in a timely manner.

[0022] As Figure 1 、 Figure 2 and Figure 3 shown, the technical solution in the embodiment of this application effectively solves the technical problem that the condensate water flowing out from the heating surface at the tail of the existing boiler is not easily discharged in a timely manner. The general idea is as follows:

[0023] In view of the problems existing in the prior art, the utility model provides a tail water seal for a gas hot water boiler, which includes a diversion pipe 1. The diversion pipe 1 includes a water inlet end 101, a first U-shaped bend 102, a second U-shaped bend 103 and a water outlet end 104. The water inlet end 101 of the diversion pipe 1 is fixedly connected to the inside of the furnace. The second U-shaped bend 103 of the diversion pipe 1 is fixedly connected with a water seal tank 2. One side of the water seal tank 2 away from the diversion pipe 1 is fixedly connected with an overflow port 3, and a water volume scale line 4 is fixedly connected below the overflow port 3.

[0024] The water inlet end 101 of the diversion pipe 1 and the vertex of the second U-shaped bend 103 are at the same horizontal height.

[0025] The water volume scale line 4 is flush with the bottom of the water inlet of the overflow port 3.

[0026] The water volume scale line 4 is flush with the highest point of the second U-shaped bend 103 of the diversion pipe 1.

[0027] The water seal tank 2 is filled with water, and the water surface height is flush with the water volume scale line 4.

[0028] The water outlet end 104 of the diversion pipe 1 extends deep into the water body contained in the water seal tank 2.

[0029] According to the principle of equal liquid levels in a communicating vessel, the condensed water led out from the inside of the furnace by the diversion pipe 1 passes through the first U-shaped bend 102 and the second U-shaped bend 103 and is directly introduced into the water seal tank 2. Since water has been added to the water seal tank 2 and the water surface height reaches the water volume scale line 4, the condensed water introduced into the water seal tank 2 raises the water surface. When the water volume in the water seal tank 2 reaches the overflow port 3, the excess water flows out from the overflow port 3, enabling this application to have the effect of quickly discharging the condensed water flowing out from the heating surface at the tail of the boiler.

[0030] Working principle:

[0031] First step, setting a water seal at the tail of the boiler can not only ensure the internal pressure of the boiler, prevent the carbon dioxide gas in the flue gas in the furnace from escaping, ensure the normal operation of the boiler, but also ensure that the condensed water in the furnace overflows to the outside of the furnace to avoid corrosion of the water-cooled wall tubes in the furnace.

[0032] Second step, according to the pressure formula F = ρgh, it can be known that the liquid pressure is related to the liquid density and the liquid height. Under the condition of the same medium, the liquid pressure is only related to the liquid height, that is, the principle of equal liquid levels in a communicating vessel. And the liquid level of the condensed water accumulated in the furnace is higher than the liquid level of the water in the water seal tank 2. Therefore, the diversion pipe 1 can lead out the condensed water inside the furnace. After the led-out condensed water passes through the first U-shaped bend 102 and the second U-shaped bend 103, it is directly introduced into the water seal tank 2. Since water has been added to the water seal tank 2 and the water surface height reaches the water volume scale line 4, the condensed water introduced into the water seal tank 2 raises the water surface. When the water volume in the water seal tank 2 reaches the overflow port 3, the excess water naturally flows out from the overflow port 3.

[0033] Finally, it should be noted that: Obviously, the above embodiments are merely examples for clearly illustrating the present utility model, rather than limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present utility model.

Claims

1. A tail water seal for a gas hot water boiler, characterized in that: The invention comprises a flow guide pipe (1), wherein the flow guide pipe (1) comprises a water inlet end (101), a first U-shaped bend (102), a second U-shaped bend (103) and a water outlet end (104); the water inlet end (101) of the flow guide pipe (1) is fixedly connected to the interior of a furnace; the second U-shaped bend (103) of the flow guide pipe (1) is fixedly connected to a water seal tank (2); a side of the water seal tank (2) away from the flow guide pipe (1) is fixedly connected to an overflow port (3); and a water volume mark line (4) is fixedly connected below the overflow port (3).

2. A tail water seal for a gas hot water boiler as claimed in claim 1, characterized in that: The water inlet end (101) of the flow guide pipe (1) and the apex of the second U-shaped bend (103) are located at the same horizontal height.

3. A tail water seal for a gas hot water boiler as claimed in claim 2, characterized in that: The water volume mark line (4) is flush with the bottom of the water inlet of the overflow port (3).

4. A tail water seal for a gas hot water boiler as claimed in claim 3, characterized in that: The water volume marking line (4) is flush with the highest point of the second U-shaped bend (103) of the flow guide pipe (1).

5. A tail water seal for a gas hot water boiler as claimed in claim 4, characterized in that: The water seal tank (2) is filled with water, and the water level is flush with the water level mark (4).

6. A tail water seal for a gas hot water boiler as claimed in claim 1, characterized in that: The water outlet end (104) of the flow guide pipe (1) penetrates into the water body contained in the water seal tank (2).

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