Horizontal internal combustion two-return-stroke wet back type gas boiler

Abstract

The utility model relates to the field of gas-fired boiler high-end energy equipment in the industrial boiler industry, in particular to a horizontal internal combustion two-return-stroke wet-back gas-fired boiler which comprises a base, a shell, a front smoke box, a platform escalator, a flue, a smoke outlet, an energy saver, a condenser, a corrugated furnace type hearth, a long smoke pipe and a reversal chamber. The corrugated furnace pipe type hearth and the long smoke pipe form a boiler body, the reversal chamber is connected with the corrugated furnace pipe type hearth and the long smoke pipe, the flue gas flow is two return strokes, the corrugated furnace pipe type hearth is the first return stroke, the long smoke pipe is the second return stroke, and the flue gas passes through the energy saver and the condenser in sequence after passing through the two return strokes, so that the boiler is smaller in occupied area, and the energy-saving effect is better. And the heat efficiency of the boiler is improved by optimizing a tail heat transfer structure and a smaller heating area.

Description

Technical Field

[0001] The utility model relates to the field of high-end energy equipment of gas boilers in the industrial boiler industry, specifically a horizontal internal combustion two-pass wet back gas boiler. Background Art

[0002] In the industrial boiler special equipment high-end energy equipment industry, as energy becomes increasingly scarce, it is urgent to improve boiler efficiency and thus improve energy utilization, and it is necessary to reduce the cost of the site where the boiler special equipment is used. Boiler equipment with high thermal efficiency and small footprint is needed to meet market demand and can be used in multiple occasions, including basements, capacity expansion of existing boiler rooms, and equipment transformation of boiler rooms.

[0003] Compared with the traditional horizontal internal combustion three-pass wet back gas boiler, the horizontal internal combustion two-pass wet back gas boiler has a smaller footprint, optimizes the tail heat transfer structure to reduce the heating area, and improves the thermal efficiency of the boiler. Utility Model Content

[0004] The utility model aims to provide a horizontal internal combustion two-pass wet back gas boiler, realizing a two-pass structure on the flue gas side of the boiler body, and adopting an economizer and condenser of a vertical header to realize water side countercurrent and flue gas side flushing, effectively improving the thermal efficiency of the boiler and reducing the floor space occupied by the boiler equipment.

[0005] To achieve the above-mentioned purpose of the invention, the utility model provides a structure for preventing the exhaust temperature of a biomass boiler from being too low when the biomass boiler is running at low load, including a base, an outer shell, a front smoke box, a platform escalator, a flue, a smoke outlet, an economizer, a condenser, a corrugated furnace, a long smoke pipe and a reburning chamber. The corrugated furnace and the long smoke pipe constitute the boiler body, and the reburning chamber is connected to the corrugated furnace and the long smoke pipe. The flue gas flow process has two return trips, the corrugated furnace is the first return trip, and the long smoke pipe is the second return trip. After the two return trips, the flue gas passes through the economizer and the condenser in sequence.

[0006] Preferably, the economizer is a vertical header economizer.

[0007] Preferably, the condenser is a vertical header condenser.

[0008] Preferably, the outer side of the regeneration chamber is a wet back structure.

[0009] Preferably, the economizer and the condenser are arranged on the top side of the boiler body.

[0010] Preferably, the smoke outlet is arranged above the front smoke box.

[0011] The advantages of the utility model are:

[0012] 1. The flue gas side of the boiler body is a two-pass structure. The flue gas flow of the pressure-bearing boiler body consists of two returns, a corrugated furnace and a long smoke pipe. This structure can reduce the fire boundary height of the body and thus reduce the size of the boiler body, reducing the overall footprint of the boiler and effectively reducing the transportation size of the boiler.

[0013] 2. The regenerative chamber is a wet back structure. The regenerative chamber is the area with the highest volumetric heat load of the boiler and is also responsible for the diversion function of the flue gas. The tube sheet behind the regenerative chamber is in the water space, which has the effect of heat transfer and cooling, and can improve the high temperature resistance of the regenerative chamber. There is no problem of burning. The wet back regenerative chamber is in the water space, which also improves the radiation heat transfer area and heat transfer efficiency of the boiler.

[0014] 3. The economizer and condenser are vertical header structures. In the calculation of boiler convection heat transfer, the direction of water flow is opposite to the direction of flue gas, which is the best heat transfer structure. The headers of traditional economizers and condensers are horizontal structures with low heat transfer effect and require independent support, which increases the heating area and causes material waste. The economizer and condenser with vertical headers can improve the heat transfer efficiency, rely on the support of the boiler body itself, reduce the cost of materials, and reduce the size of components.

[0015] 4. The utility model has a simple structure, the boiler body, the economizer and the condenser are completely assembled and shipped from the factory, and the installation period is short. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : It is a schematic diagram of the structure of the utility model;

[0017] Figure numerals: corrugated furnace 1, long smoke pipe 2, reburning chamber 3, vertical header economizer 4, vertical header condenser 5, front smoke box 6, outer shell 7, platform escalator 8, smoke outlet 9, base 10, flue 11. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] In addition, the directional words mentioned in the following embodiments, such as "upper", "lower", "front", "back", etc., are only referenced to the directions of the drawings. Therefore, the directional words used are used to illustrate rather than limit the invention of the utility model.

[0020] like Figure 1As shown, a horizontal internal combustion two-pass wet back gas boiler includes a corrugated furnace 1, a long smoke tube 2, a reburning chamber 3, an economizer 4, a condenser 5, a front smoke box 6, a shell 7, a platform escalator 8, a smoke outlet 9, a base 10 and a flue 11. The shell 7 is adapted to the base 10. The corrugated furnace 1 and the long smoke tube 2 constitute the boiler body, and the reburning chamber 3 is connected to the corrugated furnace 1 and the long smoke tube 2. The flue gas flow is two-pass, the corrugated furnace 1 is the first pass, and the long smoke tube 2 is the second pass. A wet back structure is formed in the water space outside the reburning chamber 3. The smoke outlet 9 is arranged above the front smoke box 6. The economizer 4 and the condenser 5 are arranged on the flue 11 above the boiler body, and are vertical header structures. After two passes, the flue gas passes through the economizer 4 and the condenser 5 in sequence.

[0021] The flue gas flow consists of two return paths, namely, a corrugated furnace 1 and a long smoke pipe 2. The rear tube sheet of the reburning chamber 3 is a wet back structure. The smoke outlet 9 is at the front end of the boiler body. The economizer 4 and condenser 5 are arranged on the top side of the boiler body. This arrangement can reduce the fire boundary height of the body and thus reduce the size of the body, effectively reducing the transportation size. The arrangement of the economizer 4 and condenser 5 on the top side of the boiler body can effectively reduce the overall footprint of the boiler in the boiler room. The economizer 4 and condenser 5 are arranged in a vertical header to improve the heat transfer effect of the components, thereby improving the efficiency of the boiler. It is a very practical horizontal internal combustion two-pass wet back gas boiler.

[0022] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal internal combustion two-pass wet back gas boiler, comprising a base, a shell, a front smoke box, a platform escalator, a flue, a smoke outlet, an economizer and a condenser, characterized in that: It includes a corrugated furnace, a long smoke tube and a reburning chamber. The corrugated furnace and the long smoke tube constitute the boiler body. The reburning chamber is connected with the corrugated furnace and the long smoke tube. The flue gas flow has two returns, the corrugated furnace is the first return, and the long smoke tube is the second return. After the two returns, the flue gas passes through the economizer and the condenser in sequence.

2. A horizontal internal combustion two-pass wet back gas boiler according to claim 1, characterized in that: The energy saver is a vertical header energy saver.

3. A horizontal internal combustion two-pass wet back gas boiler according to claim 1, characterized in that: The condenser is a vertical header condenser.

4. A horizontal internal combustion two-pass wet back gas boiler according to claim 1, characterized in that: The outer side of the regenerative chamber is a wet back structure.

5. A horizontal internal combustion two-pass wet back gas boiler according to claim 1, characterized in that: The economizer and the condenser are arranged on the top side of the boiler body.

6. A horizontal internal combustion two-pass wet back gas boiler according to claim 1, characterized in that: The smoke outlet is arranged above the front smoke box.

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