Energy-saving dedusting sodium sulfide waste heat furnace with horizontal economizer

Abstract

The utility model belongs to the technical field of boilers, and particularly relates to an energy-saving dedusting sodium sulfide waste heat furnace with a horizontal economizer, which comprises a furnace body, a boiler barrel and an ash bucket. A settling chamber and a flue group are arranged in the furnace body; the settling chamber is positioned on the inner side of the smoke inlet of the furnace body, and the flue group is communicated with the settling chamber; the boiler barrel is arranged at the outer top of the boiler body; the flue group comprises a communicating flue and an economizer; the communicating flue is communicated with the settling chamber; the coal economizer is horizontally arranged, and a coiled pipe of the coal economizer is mounted in a suspended manner, so that the coiled pipe is in a vertical state; and an ash hopper is arranged at the bottom of the economizer. According to the scheme, the coal economizer is horizontally arranged, so that the coiled pipe in the coal economizer is arranged in a vertical state, the separated soot can vertically fall into the ash hopper by virtue of the gravity of the soot, the problem of ash deposition of the coal economizer with a vertical structure is effectively solved, and the vertical cooling water tank arranged behind the coal economizer further reduces the temperature of flue gas; and the dust remover is protected from overheating damage.

Description

Technical Field

[0001] The utility model belongs to the technical field of boilers, and in particular relates to an energy-saving dust-removing alkali sulfide waste heat furnace with a horizontal economizer. Background Art

[0002] The prior art (ZL201620541692.5) discloses an energy-saving dust-removing sodium sulfide waste heat furnace. In this scheme, the economizer is a vertical structure, and the flue gas flows from top to bottom. The serpentine tube of the economizer is supported by itself and the serpentine tube is arranged horizontally, resulting in serious accumulation of smoke and dust on the serpentine tube, which easily leads to the problem of blockage of the flue gas channel in the economizer, and even in severe cases, the economizer may burst.

[0003] Therefore, it is necessary to design an energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer to facilitate the falling of smoke and dust on the economizer's serpentine tube, thereby reducing the probability of blockage of the economizer flue gas channel and the probability of economizer tube burst. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the present invention provides an energy-saving dust-removing alkali sulfide waste heat furnace with a horizontal economizer.

[0005] The technical solution adopted by the utility model is:

[0006] An energy-saving dust-removing alkali sulfide waste heat furnace with a horizontal economizer, comprising a furnace body, a boiler drum and an ash hopper; a settling chamber and a flue group are arranged in the furnace body; the settling chamber is located on the inner side of the furnace body smoke inlet, and the flue group is connected with the settling chamber; the boiler drum is arranged on the outer top of the furnace body;

[0007] The flue group includes a connecting flue and an economizer; the connecting flue is connected to the settling chamber; the economizer is arranged horizontally, and the serpentine tube of the economizer is suspended and installed so that the serpentine tube is placed in an upright state; an ash hopper is arranged at the bottom of the economizer to receive the ash falling from the outer tube wall of the serpentine tube.

[0008] As an alternative or supplement to the above energy-saving dust removal alkali sulfide waste heat furnace: the smoke outlet is connected to a vertical cooling water tank through a pipeline.

[0009] As an alternative or supplement to the above energy-saving dust-removing alkali sulfide waste heat furnace: the vertical cooling water tank is installed on the ground outside the furnace body; the smoke outlet is connected to the top of the vertical cooling water tank through an inverted U-shaped pipe.

[0010] As an alternative or supplement to the above energy-saving dust-removing alkali sulfide waste heat furnace: a plurality of settling chambers are connected to the connecting flue, and a shut-off valve is provided between each settling chamber and the connecting flue.

[0011] As an alternative or supplement to the above energy-saving dust-removing alkali sulfide waste heat furnace: an ash accumulation pool or ash hopper is provided at the bottom of each settling chamber.

[0012] As an alternative or supplement to the above energy-saving dust-removing alkali sulfide waste heat furnace: a plurality of mechanical rapping devices are arranged on the outer wall of the economizer, and the mechanical rapping devices are used to generate vibration and transmit the vibration to the economizer.

[0013] As an alternative or supplement to the above energy-saving dust-removing alkali sulfide waste heat furnace: a smoke exhaust pipe is arranged in the vertical cooling water tank, the smoke exhaust pipe is connected to the smoke outlet, and a dust removal bag is arranged at the outlet of the smoke exhaust pipe.

[0014] The beneficial effects of the utility model are as follows: this scheme places the economizer horizontally, so that the serpentine tube in the economizer is placed in a vertical state. When the smoke ash contacts the outer tube wall of the serpentine tube, the loose smoke ash can fall vertically into the ash hopper by its own gravity. The smoke ash with a certain adhesion is vibrated by a mechanical vibration device and separated from the tube surface of the serpentine tube and also falls into the ash hopper by its own gravity. This effectively solves the problem of ash accumulation in the economizer with a vertical structure and reduces the probability of blockage of the flue gas channel and the probability of tube burst in the economizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below.

[0016] Figure 1 It is a side view of the structure of the energy-saving dust removal alkali sulfide waste heat furnace;

[0017] Figure 2 This is the layout diagram of the economizer serpentine tubes.

[0018] In the figure: 1-settling chamber; 2-furnace body; 3-connecting flue; 5-economizer; 6-vertical cooling water tank; 7-boiler drum; 14-ash hopper; 15-mechanical vibration device; 16-shut-off valve; 17-smoke inlet; 18-smoke outlet; 19-rotary kiln. DETAILED DESCRIPTION

[0019] The technical solution in this embodiment will be clearly and completely described below in conjunction with the accompanying drawings. The described embodiments are only some of the embodiments, not all of them. Based on the embodiments in this solution, all other embodiments obtained by ordinary technicians in this field without making creative work are within the protection scope of this solution.

[0020] Example 1

[0021] like Figure 1 to Figure 2As shown, this embodiment designs an energy-saving dust-removing alkali sulfide waste heat furnace with a horizontal economizer. The energy-saving dust-removing alkali sulfide waste heat furnace in this embodiment is an improvement based on the prior art (ZL201620541692.5, an energy-saving dust-removing alkali sulfide waste heat furnace). The energy-saving dust-removing alkali sulfide waste heat furnace in this embodiment includes a furnace body 2, a boiler drum 7, an ash hopper 14 and other components. Other components and connection methods refer to the prior art and are not described in detail here.

[0022] The furnace body 2 has a smoke inlet 17 and a smoke outlet 18 ; the smoke inlet 17 is used to be connected to the rotary kiln 19 .

[0023] The furnace body 2 is sequentially provided with a connecting flue 3, a convection heat exchange tube group and an economizer 5. The settling chamber 1 is located on the inner side of the smoke inlet 17 of the furnace body 2. When the smoke in the rotary kiln 19 enters the furnace body 2 through the smoke inlet 17, it will first pass through the settling chamber 1. The settling chamber 1 performs preliminary treatment on the smoke, mainly through gravity sedimentation and dust removal, reducing a large amount of dust from being brought into the flue behind, reducing the blockage of the flue, and thus facilitating subsequent operations. A plurality of settling chambers 1 are connected to the connecting flue 3, and a cut-off valve 16 is provided between each settling chamber 1 and the connecting flue 3. The settling chamber 1, each settling chamber 1 is provided with a smoke inlet 17, and each settling chamber 1 is separately connected to a rotary kiln 19, so that the smoke generated by multiple rotary kilns 19 can be processed synchronously. At the same time, it is controlled by the cut-off valve 16, which can be opened / closed according to the actual situation, and the timing of the smoke entering the connecting flue 3 is controlled, so as to better treat the smoke and effectively control the settling time.

[0024] The flue group in the furnace body 2 is connected with the settling chamber 1 , and the flue group includes a connecting flue 3 and an economizer 5 ; the connecting flue 3 is connected with the settling chamber 1 .

[0025] The economizer 5 is disposed horizontally, and the serpentine tube of the economizer 5 is suspended so that the serpentine tube is placed in an upright state; an ash hopper 14 is disposed at the bottom of the economizer 5 to receive the ash falling from the outer tube wall of the serpentine tube.

[0026] The connecting flue 3 in the furnace body 2 is connected to multiple settling chambers 1, so as to collect the flue gas. After the collected flue gas reaches the economizer 5, it flows vertically upward, so that the smoke ash contacts the outer tube wall of the serpentine tube. Since the serpentine tube is arranged vertically, the loose smoke ash can fall vertically into the ash hopper 14. The smoke ash with a certain adhesion is vibrated by the mechanical vibration device 15, separated from the tube surface of the serpentine tube and also falls into the ash hopper 14, which effectively solves the problem of ash accumulation in the vertical economizer 5 and reduces the probability of smoke channel blockage and tube burst in the economizer 5.

[0027] The boiler drum 7 is arranged on the outer top of the furnace body 2, and the arrangement of the boiler drum 7 is the same as that in the prior art.

[0028] The smoke outlet 18 is connected to the vertical cooling water tank 6 through a pipe, and the vertical cooling water tank 6 is installed on the ground outside the furnace body 2; the smoke outlet 18 is connected to the top of the vertical cooling water tank 6 through an inverted U-shaped pipe. A smoke exhaust pipe is arranged in the vertical cooling water tank 6, and the smoke exhaust pipe is connected to the smoke outlet 18. The smoke exhaust pipe is immersed in the water body of the vertical cooling water tank 6, and a dust removal bag is arranged at the outlet of the smoke exhaust pipe. After the vertical cooling water tank 6 cools down, the dust removal bag behind can be protected from burning due to the high outlet temperature; at the same time, the vertical cooling water tank 6 can reduce the exhaust temperature and reduce the amount of smoke in the smoke.

[0029] Each settling chamber 1 is provided with an ash accumulation pool (such as Figure 1 A plurality of ash hoppers are provided below the horizontal economizer 5.

[0030] A plurality of mechanical rapping devices 15 are provided on the outer side wall of the economizer 5 , and the mechanical rapping devices 15 are used to generate vibration and transmit the vibration to the economizer 5 .

[0031] The above embodiments are merely examples for the purpose of clarifying the description, and are not intended to limit the implementation methods; it is not necessary and impossible to list all implementation methods exhaustively. However, obvious changes or modifications derived therefrom are still within the scope of protection of the present technology.

Claims

1. An energy-saving dust removal sodium sulfide waste heat furnace with a horizontal economizer, Features: The invention comprises a furnace body (2), a boiler drum (7) and an ash hopper (14); a settling chamber (1) and a flue group are arranged in the furnace body (2); the settling chamber (1) is located on the inner side of a smoke inlet (17) of the furnace body (2), and the flue group is connected to the settling chamber (1); the boiler drum (7) is arranged on the outer top of the furnace body (2); The flue group comprises a connecting flue (3) and an economizer (5); the connecting flue (3) is connected to the settling chamber (1); the economizer (5) is arranged horizontally, and the serpentine tube of the economizer (5) is suspended so that the serpentine tube is placed in an upright state; an ash hopper (14) is arranged at the bottom of the economizer (5) to receive the ash falling from the outer tube wall of the serpentine tube.

2. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 1, Features: The furnace body (2) has a smoke outlet (18), and the smoke outlet (18) is connected to the vertical cooling water tank (6) through a pipeline.

3. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 2, Features: The vertical cooling water tank (6) is installed on the ground outside the furnace body (2); the smoke outlet (18) is connected to the top of the vertical cooling water tank (6) via an inverted U-shaped pipe.

4. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 1, Features: The communicating flue (3) is connected to a plurality of settling chambers (1), and a cut-off valve (16) is provided between each settling chamber (1) and the communicating flue (3).

5. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 4, Features: An ash accumulation pool or ash hopper (14) is provided at the bottom of each settling chamber (1).

6. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 1, Features: A plurality of mechanical rapping devices (15) are arranged on the outer side wall of the economizer (5), wherein the mechanical rapping devices (15) are used to generate vibration and transmit the vibration to the economizer (5).

7. The energy-saving dust-removing sodium sulfide waste heat furnace with a horizontal economizer according to claim 1, Features: A smoke exhaust pipe is arranged in the vertical cooling water tank (6), the smoke exhaust pipe is connected to the smoke outlet (18), and a dust removal bag is arranged at the outlet of the smoke exhaust pipe.

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