Energy-saving multi-purpose boiler with smoke and water double return, countercurrent and step-by-step heat exchange

Abstract

The application discloses a smoke path and water path double-return, countercurrent ladder type heat exchange energy-saving multi-purpose boiler, which comprises a water outlet tank arranged in a box body and connected with a water outlet; a water return tank arranged in the box body and connected with a water return inlet, wherein the water return tank is arranged below the water outlet tank; a vertical plate connected with one end of the water return tank, wherein the vertical plate and the water outlet tank form a smoke inlet; the water outlet tank, the vertical plate and the water return tank divide the box body into a combustion chamber and a flue gas chamber; a plurality of vertical pipes are connected between the water outlet tank and the water return tank, and the vertical pipes are arranged on one side of the combustion chamber; a plurality of bend pipes are connected between the water outlet tank and the water return tank, and the plurality of bend pipes are arranged on one side of the flue gas chamber; the countercurrent mode of the flue gas and the liquid in the bend pipes can accelerate the liquid flow and effectively slow down the flue gas flow speed; the accelerated liquid flow improves the heat exchange efficiency, and the slowed down flue gas flow speed prolongs the heat exchange time, which is helpful to further improve the heat exchange efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of boilers, in particular to a smoke and water double return, countercurrent and step-by-step heat exchange energy-saving multi-purpose boiler. BACKGROUND

[0002] A boiler is a device that converts chemical energy into heat energy. It uses coal, oil, or gas as fuel to produce steam or hot water. However, many current boiler systems have low thermal efficiency, especially when operating at high or low loads. The heat exchange process in the boiler often results in energy loss, such as high-temperature flue gas being directly discharged from the highest temperature hot water into the environment, causing the exhaust gas temperature to be higher than the hot water temperature. This leads to energy waste and fails to maximize heat utilization.

[0003] Although modern boiler technology has made some progress in improving flue gas emissions, many boilers still have excessively high flue gas emission temperatures. This not only causes heat energy waste but also pollutes the environment. Direct discharge of high-temperature flue gas also increases the energy consumption of boiler operation, resulting in low overall energy efficiency of the boiler. In some boiler systems, the flow directions of flue gas and water vapor are both upward and in the same direction, which means that the heat exchange between the liquid and the flue gas is not maximized. The flow directions of flue gas and water are the same, and the heat exchange efficiency is low because the heat transfer gradually decreases with the increase of flow distance, resulting in the ineffective utilization of part of the heat energy. SUMMARY

[0004] The present application addresses the deficiencies in the prior art by providing a design of smoke and water double return, combined with countercurrent and step-by-step heat exchange. The heat exchange process is divided into layers and stages, maximizing the heat exchange efficiency, while reducing the emission temperature of flue gas and effectively reducing the heat waste in flue gas.

[0005] The purpose of the present application is achieved in the following manner: a smoke and water double return, countercurrent and step-by-step heat exchange energy-saving multi-purpose boiler tower, comprising:

[0006] a box body with various components inside;

[0007] a water outlet tank located at the top of the box body, connected with a water outlet;

[0008] a water return tank located at the bottom of the box body, connected with a water return port, and located below the water outlet tank;

[0009] a vertical plate connected to one end of the water return tank and extending to the side below the water outlet tank, forming an inlet for flue gas between the vertical plate and the water outlet tank;

[0010] The water outlet tank is sealedly connected to the inner wall of the box body away from the vertical plate;

[0011] The lower side of the water return tank is sealedly connected to the lower side inner wall of the box body;

[0012] The water outlet tank, the vertical plate and the water return tank divide the box body into a combustion chamber and a flue gas chamber, and the combustion chamber is connected to the combustion machine;

[0013] A plurality of vertical pipes are connected between the water outlet tank and the water return tank, and the vertical pipes are arranged on one side of the combustion chamber;

[0014] A plurality of elbow pipes are connected between the water outlet tank and the water return tank, and the plurality of elbow pipes are arranged on one side of the flue gas chamber;

[0015] A smoke outlet is arranged on the lower side of the combustion chamber.

[0016] The water outlet tank, the vertical plate and the water return tank of the present application divide the box body into a combustion chamber and a flue gas chamber, and the combustion chamber is connected to the combustion machine, and a plurality of vertical pipes are connected between the water outlet tank and the water return tank, and the vertical pipes are arranged on one side of the combustion chamber. The water in the water outlet tank, the water return tank and the vertical pipe is heated by the combustion machine to form water vapor, which rises and is collected in the water outlet tank and is delivered to the place where heat is needed through the water outlet, and the water in the elbow pipe is heat exchanged with the flue gas, and the water vapor in the elbow pipe is also delivered through the water outlet.

[0017] As an optional solution of the technical scheme of the present application, a plurality of the vertical pipes are connected to the water outlet tank through a bending part, and the bending part is not horizontal but has an upward angle with an inner folding angle greater than 90°.

[0018] As an optional solution of the technical scheme of the present application, the flue gas chamber is provided with a flue gas guide plate, and the flue gas guide plate comprises:

[0019] A flue gas upper guide plate is arranged above the plurality of elbow pipes and connects the water outlet tank and the side wall of the box body;

[0020] A flue gas lower guide plate is arranged below the plurality of elbow pipes and is connected to one side of the water return tank at one end.

[0021] As an optional solution of the technical scheme of the present application, the flue gas guide plate further comprises:

[0022] A plurality of flue gas middle guide plates are arranged between the flue gas upper guide plate and the flue gas lower guide plate;

[0023] The flue gas upper guide plate, the plurality of flue gas middle guide plates and the flue gas lower guide plate are arranged above each straight section of the elbow pipe;

[0024] One end of adjacent flue gas middle guide plates is alternately connected to the vertical plate and the side wall of the flue gas chamber;

[0025] The adjacent smoke guide plates are provided with a passage through which the elbow pipe bending section passes.

[0026] The application guides the flow direction of the flue gas by arranging the flue gas guide plates, so that the flue gas and the liquid in the elbow pipe form countercurrent, the liquid in the elbow pipe reaches the effect of self-lift force accelerating climbing, and the purpose of flue gas deceleration emission and increasing heat exchange time is achieved.

[0027] As an optional solution of the technical scheme of the application, the upper flue gas guide plate, the plurality of middle flue gas guide plates and the lower flue gas guide plate are arranged in parallel with the corresponding straight sections of the elbow pipe.

[0028] As an optional solution of the technical scheme of the application, the straight sections of the elbow pipe are arranged in an inclined manner.

[0029] As an optional solution of the technical scheme of the application, a certain gap is arranged between the adjacent vertical pipes and between the adjacent elbow pipes.

[0030] The beneficial effects of the application are as follows:

[0031] (1) The flue gas and water double-return, countercurrent ladder-type heat exchange energy-saving multi-purpose boiler tower of the application can accelerate the liquid flow and effectively slow down the downward flow speed of the flue gas through the countercurrent mode of the flue gas and the liquid in the elbow pipe; the accelerated flow of the liquid improves the heat exchange efficiency, and the slowing down of the flue gas flow speed prolongs the heat exchange time, which helps to further improve the heat exchange efficiency;

[0032] (2) The application utilizes the heat exchange between the high-temperature flue gas and the high-temperature hot water and the heat exchange between the low-temperature flue gas and the low-temperature water, so that the heat exchange process is carried out in layers, further optimizing the heat exchange efficiency, and reducing the flue gas emission temperature; the ladder-type design effectively reduces the waste of heat in the flue gas;

[0033] (3) The boiler tower of the application can emit flue gas at a lower temperature, and improve the heat exchange efficiency through the countercurrent mode, so as to achieve the effect of energy saving and emission reduction; the flue gas emission temperature is lower, which reduces the influence on the environment and meets the modern energy saving and emission reduction requirements. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0035] Figure 1 It is a structural schematic view of the flue gas and water double-return, countercurrent ladder-type heat exchange energy-saving multi-purpose boiler of the application.

[0036] Figure 2 Structure diagram of the energy-saving multi-purpose boiler with smoke path and water path double return, counter-flow and ladder type heat exchange after removing part of the box according to the present application;

[0037] Figure 3 Main view of the energy-saving multi-purpose boiler with smoke path and water path double return, counter-flow and ladder type heat exchange after removing part of the box according to the present application;

[0038] Figure 4 Principle diagram of the energy-saving multi-purpose boiler with smoke path and water path double return, counter-flow and ladder type heat exchange according to the present application.

[0039] Reference signs:

[0040] 100 - box;

[0041] 200 - water outlet tank; 210 - water outlet;

[0042] 300 - water return tank; 310 - water return;

[0043] 400 - vertical plate;

[0044] 500 - flue gas chamber; 510 - flue gas inlet; 520 - flue gas outlet;

[0045] 600 - combustion chamber;

[0046] 700 - combustion machine;

[0047] 810 - vertical pipe; 820 - elbow pipe;

[0048] 900 - flue gas guide plate; 910 - upper flue gas guide plate; 920 - middle flue gas guide plate; 930 - lower flue gas guide plate. DETAILED DESCRIPTION

[0049] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0050] It should be noted that all the directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications will also change accordingly.

[0051] In the description of the embodiments, unless otherwise explicitly specified and limited, the terms "set", "connected", and the like should be understood in a broad sense. For example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or connected through an intermediate medium, or connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] As shown in Figures 1-3 The smoke path, water path double return, countercurrent step heat exchange energy-saving multi-purpose boiler tower includes a box body 100, a water outlet tank 200, a water return tank 300 and a vertical plate 400. The box body 100 is provided with various components; the water outlet tank 200 is arranged at the top of the box body 100, and the water outlet tank 200 is connected with a water outlet 210; the water return tank 300 is arranged at the bottom of the box body 100, and the water return tank 300 is connected with a water return port 310, and the water return tank 300 is arranged below the water outlet tank 200; the vertical plate 400 is connected with the upper end of the water return tank 300 at one end, and extends to one side below the water outlet tank 200 at the other end, and the vertical plate 400 is not connected with the water outlet tank 200, and the top of the vertical plate 400 and the water outlet tank 200 form a smoke inlet 510; the side of the water outlet tank 200 away from the vertical plate 400 is sealingly connected with the inner wall of the box body 100; the lower side of the water return tank 300 is sealingly connected with the inner wall of the lower side of the box body 100.

[0053] As shown in Figure 3 The water outlet tank 200, the vertical plate 400 and the water return tank 300 divide the box body 100 into a combustion chamber 600 and a flue gas chamber 500, the combustion chamber 600 is connected with a combustion machine 700, a plurality of vertical pipes 810 are communicated between the water outlet tank 200 and the water return tank 300, the vertical pipes 810 are arranged next to the vertical plate 400 on one side of the combustion chamber 600, and the plurality of vertical pipes 810 are communicated with the water outlet tank 200 through upward bending parts, the bending parts are not horizontal, but are upward angles with an inside folding angle greater than 90°, so that water vapor can enter the water outlet tank 200; the water in the water outlet tank 200, the water return tank 300 and the plurality of vertical pipes 810 is heated by the flame released by the combustion machine 700, and the flue gas generated by the combustion of the fuel of the combustion machine 700 enters the flue gas chamber 500 through the smoke inlet 510.

[0054] A plurality of elbow pipes 820 are communicated between the water outlet tank 200 and the water return tank 300, and the plurality of elbow pipes 820 are arranged on one side of the flue gas chamber 500; a certain gap is arranged between adjacent vertical pipes 810 and between adjacent elbow pipes 820, so that flue gas can pass through the gap; a smoke outlet 520 is arranged on the lower side of the combustion chamber 600.

[0055] In this embodiment, the water outlet tank 200, the vertical plate 400, and the return water tank 300 divide the housing 100 into a combustion chamber 600 and a flue gas chamber 500. The combustion chamber 600 is connected to the burner 700. Several vertical pipes 810 connect the water outlet tank 200 and the return water tank 300, and the vertical pipes 810 are located on one side of the combustion chamber 600. The burner 700 heats the water in the water outlet tank 200, the return water tank 300, and the vertical pipes 810 to form steam. The steam rises and accumulates in the water outlet tank 200, and is then transported to the location requiring heat through the water outlet 210. The water in the bend 820 exchanges heat with the flue gas, and the steam in the bend is also transported through the water outlet 210.

[0056] As a further embodiment, the flue gas chamber 500 is provided with a flue gas guide plate 900, which includes an upper flue gas guide plate 910 and a lower flue gas guide plate 930. Specifically: the upper flue gas guide plate 910 is located above a plurality of bends 820, connecting the water outlet tank 200 and the side wall of the housing 100; allowing flue gas to enter the flue gas chamber 500 from below the upper flue gas guide plate 910; the lower flue gas guide plate 930 is located below the plurality of bends 820, with one end connected to one side of the return water tank 300, allowing the flue gas to contact the bends located between the upper flue gas guide plate 910 and the lower flue gas guide plate 930.

[0057] In addition, such as Figures 3-4 As shown, to guide the flow of flue gas, the flue gas guide plate 900 also includes several intermediate flue gas guide plates 920, which are positioned between the upper flue gas guide plate 910 and the lower flue gas guide plate 930. The upper flue gas guide plate 910, the intermediate flue gas guide plates 920, and the lower flue gas guide plate 930 are positioned above each straight section of the bend 820. These plates are parallel to the corresponding straight sections of the bend 820, ensuring sufficient contact between the flue gas and the bend. Figures 3-4 As shown, the straight section of the bend 820 is inclined rather than horizontal, which facilitates the rise of water vapor. One end of the guide plate 920 in the adjacent flue gas is alternately connected to the side wall of the vertical plate 400 and the flue gas chamber 500. A channel is provided between the guide plates 920 in the adjacent flue gas for the bend section of the bend 820 to pass through.

[0058] By setting a flue gas guide plate 900 to guide the flow of flue gas, the flow of flue gas and liquid in the bend pipe are counter-current, so that the liquid in the bend pipe achieves the effect of self-lifting acceleration to climb the slope, thereby achieving the purpose of slowing down the emission of flue gas and increasing the heat exchange time.

[0059] The energy-saving multi-purpose boiler tower of the present application realizes the upward flow of liquid in the pipe and the countercurrent flow of flue gas, achieves the effect of self-lift to accelerate climbing, the downward flow of flue gas and the countercurrent flow of liquid in the pipe, achieves the purpose of reducing the discharge and increasing the heat exchange time, this structure not only realizes the accelerated flow of liquid in the pipe and the reduced discharge of flue gas outside the pipe, but also realizes the step heat exchange of high-temperature flue gas and high-temperature hot water at the highest position, and low-temperature flue gas and low-temperature hot water at the lowest position, realizes the lower flue gas discharge temperature, and achieves the purpose of energy saving and emission reduction.

[0060] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. In addition, the technical solutions of various embodiments can be combined with each other, but it must be based on the realization of ordinary technical personnel; when the combination of technical solutions appears contradictory or unachievable, it shall be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

Claims

1. A multi-purpose, energy-saving boiler tower with dual-pass, counter-current, stepped heat exchange system for flue gas and water circulation, characterized in that: include: The housing (100) contains various components; A water outlet tank (200) is located at the top inside the housing (100) and is connected to a water outlet (210). A return water tank (300) is located at the bottom of the inside of the box (100) and is connected to a return water port (310). The return water tank (300) is located below the outlet water tank (200). The upright plate (400) is connected at one end to the return water tank (300) and at the other end extends to the side below the outlet water tank (200). A smoke inlet (510) is formed between the upright plate (400) and the outlet water tank (200). The side of the water outlet tank (200) away from the vertical plate (400) is sealed to the inner wall of the box body (100); The lower side of the return water tank (300) is sealed to the lower inner wall of the box body (100); The outlet tank (200), the vertical plate (400), and the return tank (300) divide the housing (100) into a combustion chamber (600) and a flue gas chamber (500), and the combustion chamber (600) is connected to the burner (700); Several risers (810) are connected between the outlet tank (200) and the return tank (300), and the risers (810) are located on one side of the combustion chamber (600); A plurality of bends (820) are connected between the outlet tank (200) and the return tank (300), and the plurality of bends (820) are located on one side of the flue gas chamber (500); The smoke outlet (520) is located on the lower side of the combustion chamber (600); Several of the risers (810) are connected to the outlet tank (200) through a bend. The bend is not horizontal, but has an inward bend angle greater than 90°. The flue gas chamber (500) is provided with a flue gas guide plate (900), the flue gas guide plate (900) comprising: A flue gas guide plate (910) is provided above several of the bends (820) to connect the water tank (200) and the side wall of the box (100); A flue gas guide plate (930) is located below several of the aforementioned bends (820), with one end connected to one side of the return water tank (300); The flue gas guide plate (900) also includes: A plurality of flue gas guide plates (920) are disposed between the upper flue gas guide plate (910) and the lower flue gas guide plate (930); The upper flue gas guide plate (910), several middle flue gas guide plates (920) and the lower flue gas guide plate (930) are located above each straight section of the bend (820); One end of the guide plate (920) in the adjacent flue gas is alternately connected to the side wall of the vertical plate (400) and the flue gas chamber (500); A passage for the bend of the pipe (820) is provided between the guide plates (920) in the adjacent flue gas; The upper flue gas guide plate (910), several middle flue gas guide plates (920) and the lower flue gas guide plate (930) are arranged parallel to the corresponding straight sections of the bend (820); The straight section of the bend (820) is inclined; A certain gap is provided between adjacent risers (810) and between adjacent bends (820).

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