Deslagging heat recovery system of mechanical grate garbage incinerator

Abstract

The utility model relates to the technical field of waste incineration boilers, in particular to a deslagging heat recovery system of a mechanical grate waste incinerator, which is used for recovering part of heat of slag by using demineralized water and a double-layer jacket heat exchanger through the deslagging heat recovery system, reducing the deslagging heat loss of the waste incineration boiler and improving the heat recovery efficiency of the waste incineration boiler. The deslagging heat recovery of the garbage incinerator is realized, the heat efficiency of the boiler is improved, and the purposes of energy conservation and efficiency improvement of the garbage incinerator are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to garbage incineration boiler technical field, concretely is a kind of mechanical grate garbage incinerator's slag heat recovery system. BACKGROUND

[0002] In the existing garbage incineration treatment process, garbage needs to experience drying, combustion, burning three stages on mechanical grate, and the conventional slag removal system is to install slag pot at the lower part of burning grate, install slag removal pipe at the lower part of slag pot, and install slag extractor at the lower part of slag removal pipe. The slag produced after the burning of the incinerated garbage is pushed into the slag pot from the burning grate, and then enters the slag extractor after passing through double-jacket heat exchanger and slag removal pipe. The slag extractor needs to inject cooling water to a certain liquid level. After the slag is cooled in the slag extractor, it is pushed into the slag storage.

[0003] In the above prior art, 150kg of slag is produced per ton of garbage after burning, and the temperature of the slag is about 600℃. The heat carried by the slag is not fully utilized, which leads to the loss of boiler slag heat and affects the boiler thermal efficiency.

[0004] Therefore, it is necessary to design a mechanical grate garbage incinerator's slag heat recovery system. The desalted water is introduced into the double-jacket heat exchanger through the slag heat recovery system, so as to realize the recovery of the slag heat after garbage incineration, reduce the heat loss of boiler slag, and improve the boiler thermal efficiency. SUMMARY

[0005] The utility model discloses a kind of mechanical grate garbage incinerator's slag heat recovery systems, and the desalted water is introduced into the double-jacket heat exchanger through the slag heat recovery system, so as to realize the recovery of the slag heat after garbage incineration, reduce the heat loss of boiler slag, and improve the boiler thermal efficiency.

[0006] In order to achieve the above purpose, the utility model provides a kind of mechanical grate garbage incinerator's slag heat recovery system, the bottom of furnace grate is provided with slag pot, the lower part of slag pot is provided with double-jacket heat exchanger, the bottom of slag pot is provided with slag removal pipe, the lower part of slag removal pipe is provided with slag extractor, one side of slag extractor is provided with slag extractor slag discharge port, one side of double-jacket heat exchanger is connected with electric stop valve two by desalted water pipeline six, electric stop valve two is connected with deaerator by desalted water pipeline two, the other side of double-jacket heat exchanger is connected with electric regulating valve by desalted water pipeline five, electric regulating valve is connected with desalted water pump by desalted water pipeline one, desalted water pump is connected with electric stop valve one by desalted water pipeline four, electric stop valve one is connected with desalted water tank by desalted water pipeline three.

[0007] Wear-resistant plate is connected between furnace grate and slag pot.

[0008] The slag bucket and the double jacket heat exchanger are connected by welding.

[0009] The double jacket heat exchanger and the slag discharge pipe are connected by welding.

[0010] The slag discharge pipe and the slag grab are connected by welding.

[0011] The inner and outer layers of the double jacket heat exchanger are made of stainless steel plates, and the distance is 80mm.

[0012] Compared with the prior art, the mechanical grate waste incinerator slag heat recovery system has the advantages of simple structure, convenient maintenance, partial heat recovery of slag by using desalted water and double jacket heat exchanger, reduced heat loss of slag discharge of the waste incineration boiler, improved boiler thermal efficiency, and increased economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The system schematic view of the utility model.

[0014] The desalted water tank 1, the electric stop valve 2, the desalted water pump 3, the electric regulating valve 4, the double jacket heat exchanger 5, the slag bucket 6, the slag discharge pipe 7, the grate 8, the slag grab 9, the slag grab slag discharge port 10, the electric stop valve 11, the deaerator 12, the desalted water pipeline 1 13, the desalted water pipeline 2 14, the desalted water pipeline 3 15, the desalted water pipeline 4 16, the desalted water pipeline 5 17, the desalted water pipeline 6 18. DETAILED DESCRIPTION

[0015] The utility model will be further described in combination with the drawings.

[0016] Referring to Figure 1 The utility model provides a kind of mechanical grate waste incinerator slag heat recovery system, and the bottom of grate 8 is provided with slag bucket 6, and the lower side of slag bucket 6 is provided with double jacket heat exchanger 5, and the bottom of slag bucket 6 is provided with slag discharge pipe 7, and the lower side of slag discharge pipe 7 is provided with slag grab 9, and one side of slag grab 9 is provided with slag grab slag discharge port 10, and one side of double jacket heat exchanger 5 is connected with electric stop valve 11 by desalted water pipeline 6 18, and electric stop valve 11 is connected with deaerator 12 by desalted water pipeline 2 14, and the other side of double jacket heat exchanger 5 is connected with electric regulating valve 4 by desalted water pipeline 5 17, and electric regulating valve 4 is connected with desalted water pump 3 by desalted water pipeline 1 13, and desalted water pump 3 is connected with electric stop valve 2 by desalted water pipeline 4 16, and electric stop valve 2 is connected with desalted water tank 1 by desalted water pipeline 3 15.

[0017] Grate 8 and slag bucket 6 are connected with wear plate.

[0018] Slag bucket 6 and double jacket heat exchanger 5 are connected by welding.

[0019] The double-layer jacketed heat exchanger 5 is connected with the slag discharge pipe 7 by welding.

[0020] The slag discharge pipe 7 is connected with the slag grab 9 by welding.

[0021] The inner and outer layers of the double-layer jacketed heat exchanger 5 are made of stainless steel plates, and the distance between the two layers is 80 mm.

[0022] The working principle of the utility model is as follows:

[0023] The desalted water pump 3 injects desalted water into the jacket, the double-layer jacketed heat exchanger 5 is installed between the slag pot 6 and the slag discharge pipe 7 as a part of the slag discharge pipe 7, the slag after garbage combustion falls into the double-layer jacketed heat exchanger 5 from the slag pot 6, and then falls into the slag discharge pipe 7, and finally falls into the slag grab 9, the heat exchange between the slag and the desalted water is realized in the double-layer jacketed heat exchanger 5, the desalted water absorbs the heat of the slag and then enters the deaerator 12, the deaerator 12 provides feed water to the boiler, and the reuse of the heat of the slag is realized.

[0024] An electric regulating valve 4 is arranged on the desalted water pipeline connected with the double-layer jacketed heat exchanger 5, the flow of the desalted water entering the double-layer jacketed heat exchanger 5 is controlled through the electric regulating valve 4, the outlet water temperature of the double-layer jacketed heat exchanger 5 is controlled to be less than 80 DEG C, the vaporization of the desalted water in the double-layer jacketed heat exchanger 5 is avoided, the high-temperature deformation of the double-layer jacketed heat exchanger 5 is avoided, and the safe and stable operation can be realized.

[0025] The above is only the preferred embodiment of the utility model, and is only used for helping to understand the method and the core idea of the utility model, the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme belonging to the idea of the utility model belongs to the protection scope of the utility model.

[0026] In the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as the limitation of the utility model.

[0027] The utility model from overall solved the deficiency that the heat carried in the furnace slag of 15% or so of the existing technology after the garbage is burnt out is not fully utilized, thereby causes the slag heat loss, the energy -consuming low -efficient, through the set up's slag heat recovery system, utilizes the desalted water, double -decked jacketed heat exchanger to realize the partial heat recovery of the furnace slag, reduces the slag heat loss of garbage incineration boiler, realized the slag heat recovery of garbage incinerator, improves the boiler thermal efficiency, reaches the purpose that garbage incinerator energy -saving and efficiency increasing.

Claims

1. A slag heat recovery system for a mechanical grate waste incinerator, characterized in that: A slag hopper (6) is provided at the bottom of the grate (8), a double-layer jacketed heat exchanger (5) is provided below the slag hopper (6), a slag discharge pipe (7) is provided at the bottom of the slag hopper (6), a slag scoop (9) is provided below the slag discharge pipe (7), a slag scoop (9) is provided on one side of the slag scoop (9), a slag scoop discharge port (10) is provided on one side of the slag scoop (9), one side of the double-layer jacketed heat exchanger (5) is connected to an electric stop valve 2 (11) through a desalted water pipe 6 (18), and the electric stop valve 2 (11) is connected to the desalted water pipe 6 (18). The desalted water pipe 2 (14) is connected to the deaerator (12), the other side of the double-jacketed heat exchanger (5) is connected to the electric regulating valve (4) through the desalted water pipe 5 (17), the electric regulating valve (4) is connected to the desalted water pump (3) through the desalted water pipe 1 (13), the desalted water pump (3) is connected to the electric stop valve 1 (2) through the desalted water pipe 4 (16), and the electric stop valve 1 (2) is connected to the desalted water tank (1) through the desalted water pipe 3 (15).

2. The slag heat recovery system for a mechanical grate waste incinerator according to claim 1 is characterized in that: A wear-resistant plate is connected between the grate (8) and the slag hopper (6).

3. The slag heat recovery system for a mechanical grate waste incinerator according to claim 1, characterized in that: The slag hopper (6) is connected to the double-jacketed heat exchanger (5) by welding.

4. The slag heat recovery system for a mechanical grate waste incinerator according to claim 1, characterized in that: The double-jacketed heat exchanger (5) is connected to the slag discharge pipe (7) by welding.

5. The slag heat recovery system for a mechanical grate waste incinerator according to claim 1, characterized in that: The slag discharge pipe (7) is connected to the slag scooping machine (9) by welding.

6. The slag heat recovery system for a mechanical grate waste incinerator according to claim 1, characterized in that: The inner and outer steel plates of the double-layer jacketed heat exchanger (5) are made of stainless steel plates, and the distance between them is 80 mm.

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