Flue gas discharge structure of steam generator

Abstract

The utility model discloses a flue gas discharging structure of steam generator. The flue gas discharging structure of steam generator includes condensing chamber, and the flue gas output end of condensing chamber is provided with smoke collecting chamber, and the bottom of smoke collecting chamber is provided with smoke exhaust pipe, and the smoke exhaust pipe is connected with flue, which is used for discharging flue gas and condensate. The utility model solves the problem of low heat recovery rate in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of steam generating equipment technology, and in particular to a flue gas emission structure for a steam generator. Background Technology

[0002] A Chinese utility model patent with publication number CN213453584U, entitled "A 0.5T Through-Flow Steam Generator," describes a 0.5T through-flow steam generator comprising a main body, on which are mounted a combustion device, a steam generating device, an exhaust device, a condensing device, and a flue gas exhaust device. The flue gas exhaust device includes a flue gas exhaust seat with a flue gas exhaust pipe mounted on it, and a temperature sensor for detecting the temperature of the condensed flue gas is also mounted on the exhaust seat. Referring to the accompanying drawings, the flue gas exhaust seat and exhaust pipe are located at the top of the condensing chamber's output end. As is well known, high-temperature flue gas rises due to thermal buoyancy. The fact that the exhaust pipe is located at the top of the condensing chamber's flue gas output end further promotes this upward movement, resulting in a short residence time of the flue gas within the condensing chamber, insufficient contact with the condensing pipe, and low heat recovery efficiency. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flue gas emission structure for a steam generator that can improve the heat recovery and utilization rate.

[0004] To achieve the above objectives, the technical solution adopted by the flue gas emission structure of the steam generator of this utility model is as follows:

[0005] A flue gas emission structure for a steam generator includes a condensing chamber, a smoke collection chamber at the flue gas output end of the condensing chamber, a smoke exhaust pipe at the bottom of the smoke collection chamber, and a smoke exhaust duct connected to the smoke exhaust pipe for discharging flue gas and condensate.

[0006] Preferably, the exhaust duct includes a main pipe, one end of which is a closed end and the other end is an open end. The open end is the discharge end for flue gas and condensate. The side wall of the main pipe is provided with branch pipes for connecting to the exhaust pipe.

[0007] Preferably, the branch pipe is connected to the exhaust pipe through a sleeve, with the upper end of the sleeve fitted onto the outside of the exhaust pipe and the lower end of the sleeve fitted onto the outside of the branch pipe.

[0008] Preferably, a temperature sensor is installed on the side wall of the main duct near the discharge end to monitor the temperature of the emitted flue gas.

[0009] Preferably, the discharge end of the main pipeline is provided with a condensate discharge pipe.

[0010] Preferably, the sidewall of the smoke collection chamber gradually narrows from the condensation chamber side to the exhaust pipe side.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] A flue pipe is installed at the bottom of the smoke collection chamber. Bottom flue gas exhaust extends the flow path of flue gas within the steam generator, increasing the contact time and area between the flue gas and the heat exchange components. This allows heat to be transferred more fully to the condenser tubes, thereby improving heat recovery efficiency. Simultaneously, bottom flue gas exhaust facilitates a more rational heat flow distribution, enabling more efficient utilization of the heat in the flue gas and enhancing the energy efficiency of the steam generator. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the flue gas emission structure of the steam generator of this utility model.

[0014] Figure 2 This is a front view of the flue gas emission structure of the steam generator of this utility model.

[0015] Figure 3 yes Figure 2 AA sectional view.

[0016] The components include: 1. Condensation chamber; 2. Smoke collection chamber; 3. Smoke exhaust pipe; 4. Smoke exhaust duct; 41. Main pipe; 42. Branch pipe; 43. Temperature sensor; 44. Condensate drain pipe; and 5. Sleeve. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0018] like Figure 1-3As shown, a flue gas emission structure for a steam generator includes a condensing chamber 1, a smoke collection chamber 2 installed at the flue gas output end of the condensing chamber, and an exhaust pipe 3 installed at the bottom of the smoke collection chamber. The sidewall of the smoke collection chamber gradually narrows from the condensing chamber side towards the exhaust pipe side, increasing the contact area with the flue gas in the smoke collection chamber, which is beneficial for separating moisture from the flue gas in the smoke collection chamber. The exhaust pipe is connected to an exhaust duct 4 for discharging flue gas and condensate. The exhaust duct includes a main pipe 41, with a closed end on the left and an open end on the right. The open end is for discharging flue gas and condensate. At the discharge end, a branch pipe 42 for connecting to the exhaust pipe is welded to the top side wall of the main pipe. The branch pipe is connected to the exhaust pipe through a sleeve 5. The upper end of the sleeve is fitted onto the outside of the exhaust pipe, and the lower end of the sleeve is fitted onto the outside of the branch pipe. The inner edge of the upper end of the sleeve is welded to the outer circumference of the exhaust pipe, and the inner edge of the lower end of the sleeve is welded to the outer circumference of the branch pipe. The connection structure is simple and easy to operate. A temperature sensor 43 is installed on the side wall of the main pipe near the discharge end to monitor the temperature of the exhaust gas. A condensate drain pipe 44 is installed at the bottom of the discharge end of the main pipe.

[0019] The specific working process and principle of this utility model are as follows: Flue gas enters the condensing chamber from left to right within the furnace. To exit through the exhaust pipe at the bottom of the smoke collection chamber, the flue gas needs to flow from a high to a low position. This causes the flue gas to move downwards while flowing horizontally, creating a bend in the flow path. Compared to a straight exhaust method with the exhaust port at the top, this naturally lengthens the path, increasing the contact time and area between the flue gas and the heat exchange components. This allows for more efficient heat transfer to the condensing tubes, thereby improving heat recovery efficiency. Simultaneously, bottom exhaust helps to create a reasonable heat flow distribution, enabling more efficient utilization of the heat in the flue gas and improving the energy efficiency of the steam generator.

Claims

1. A flue gas emission structure for a steam generator, characterized in that: It includes a condensation chamber, a smoke collection chamber at the flue gas outlet of the condensation chamber, a smoke exhaust pipe at the bottom of the smoke collection chamber, and a smoke exhaust duct connected to the smoke exhaust pipe for discharging flue gas and condensate.

2. The flue gas discharging structure of a steam generator according to claim 1, characterized by: The exhaust duct includes a main pipe, one end of which is a closed end and the other end is an open end. The open end is the discharge end for flue gas and condensate. The side wall of the main pipe is provided with branch pipes for connecting to the exhaust pipe.

3. The flue gas discharging structure of a steam generator according to claim 2, characterized by: The branch pipe is connected to the exhaust pipe through a sleeve, with the upper end of the sleeve fitted onto the outside of the exhaust pipe and the lower end of the sleeve fitted onto the outside of the branch pipe.

4. The flue gas discharging structure of a steam generator according to claim 2, characterized by: A temperature sensor is installed on the side wall of the main pipeline near the discharge end to monitor the temperature of the emitted flue gas.

5. The flue gas discharging structure of a steam generator according to claim 4, characterized by: A condensate drain pipe is installed at the discharge end of the main pipeline.

6. The flue gas discharging structure of a steam generator according to claim 1, wherein: The sidewall of the smoke collection chamber gradually narrows from the condensation chamber side towards the exhaust pipe side.

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