Hot air heating structure between slag pools of garbage power plant

Abstract

The utility model provides a hot air heating structure between slag pools of a garbage power plant, which is used for preventing and reducing outdoor cold air from entering and heating the cold air entering the slag pool chamber so as to reduce or prevent the air between the slag pools from generating fog, and is good in equipment operation effect. The warm air blower is provided with a warm air blower air inlet and a warm air blower air outlet, the warm air blower air inlet is formed in the boiler room, and the warm air blower air outlet is connected with the main air supply pipe; the hot air curtain air supply system comprises an air curtain air supply pipe and a hot air curtain vertical air pipe; the air curtain air supply pipe is connected with the main air supply pipe, the hot air curtain vertical air pipes are connected with the air curtain air supply pipe, the hot air curtain vertical air pipes are arranged on the two sides or the upper portion of the gate between the slag pools, and hot air curtain air outlets are formed in the directions, facing the gate between the slag pools, of the hot air curtain vertical air pipes; the heating air supply system comprises a heating air supply pipe, the heating air supply pipe is connected with the main air supply pipe, the heating air supply pipe is arranged between the slag tanks, and the heating air supply pipe is provided with a heating air supply outlet.

Description

Technical Field

[0001] The utility model relates to a hot air heating structure for a slag pool in a garbage power plant. Background Art

[0002] The slag pool of the waste incineration power plant needs a slag truck to transport the slag in the slag pool to the outside of the plant. When the slag truck enters and exits the slag pool, the door of the slag pool needs to be opened. When the temperature is low, the cold air outside will invade the slag pool. When the cold air mixes with the relatively high humidity indoor air, it will condense to produce small water droplets, which will produce fog, which is the so-called "fogging". In the process of boiler humidification and slag discharge, due to the high temperature of the discharged slag, the water vapor evaporated from the wet slag and the relatively low temperature of the surrounding air will also condense to produce small water droplets, which will produce fog when the slag is discharged and stacked in the slag pool. Therefore, fog is easy to generate at the entrance and slag discharge port of the slag pool. The fog in the slag pool and the dust in the process of boiler slag discharge and loading, the air mixed with fog and dust will seriously affect the visibility in the slag pool, thereby affecting the sight of the staff in the slag crane control room operating the slag crane loading vehicle, affecting work efficiency, and even causing operation accidents. In order to remove the air containing mist and dust, the specification requires that exhaust devices such as slag pit dust removal and demisting equipment be installed in the slag pool, and the exhaust frequency should be no less than 4 times per hour. -1 Since the slag pool is an independent workshop isolated from other workshops, after the air is extracted from the slag pool, outdoor air will inevitably enter the slag pool. The entry of a large amount of low-temperature outdoor air will cause fog in the slag pool, affecting the visibility of the slag pool, forming a vicious cycle.

[0003] In order to prevent the entry of cold air from outdoors and the generation of fog in the slag pool, there are currently three common design solutions.

[0004] Solution 1: draw air from the adjacent boiler room to supplement the slag pool room. Generally, the air temperature in the boiler room is not lower than 5°C in winter, but the air temperature close to the ground of the boiler room will not be higher than 12°C. Although the supplementary air from the boiler room can alleviate the "fogging" phenomenon in the slag pool, the application of this air source temperature supplementary air has limitations and cannot meet the needs of northern projects with higher latitudes. It cannot control the generation of fog at the gate of the slag pool room, nor can it control the fog at the boiler slag discharge.

[0005] Solution 2: Install a heater or radiator in the slag pool to heat the cold air that invades the slag pool. Problems with this solution:

[0006] 1) It is impossible to solve the problem of fog at the gate of the slag pool due to the intrusion of a large amount of cold air.

[0007] 2) When the heater is in use, the dusty air in the slag pool is circulated and heated, and some dust will adhere to the heat exchange tubes and fins of the heater, which will seriously affect the heat exchange effect of the heater. Similarly, the dust in the slag pool will also adhere to the radiator, which will seriously affect the heat dissipation effect of the radiator.

[0008] Solution 3: Install hot air curtains on both sides of the slag pool door to heat the invading cold air in time and prevent fog from forming on the door. Problems with this solution:

[0009] 1) Because the hot air curtain is installed close to the outer door and in direct contact with the cold air, there is a risk of freezing of the hot air curtain.

[0010] 2) Because the hot air curtain will inhale some dusty air in the room, some dust will adhere to the heat exchange tubes and fins of the hot air curtain, which will seriously affect the heat exchange effect of the hot air curtain.

[0011] 3) During the non-loading period of the slag truck, the gate of the slag pool room is in a closed state. Because the hot air curtain must be close to the gate of the slag pool room, even if the hot air curtain is running, it is not easy to heat the air in the slag pool inside the slag pool room, and the heating function of the hot air curtain cannot be fully exerted. Utility Model Content

[0012] The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art and to provide a hot air heating structure for the slag pool room of a garbage power plant with a reasonably designed structure, which blocks and reduces the entry of outdoor cold air and heats the cold air entering the slag pool room, so as to reduce or prevent the generation of fog in the air of the slag pool room, and the equipment has a good operating effect.

[0013] The technical solution adopted by the utility model to solve the above-mentioned problems is: a hot air heating structure for the slag pool room of a garbage power plant, characterized in that it includes a heater, a main air supply pipe, a hot air air curtain air supply system and a heating air supply system; the heater is provided with a heater air inlet and a heater air outlet, the heater air inlet is arranged in the boiler room, and the heater air outlet is connected to the main air supply pipe; the hot air air curtain air supply system includes an air curtain air supply pipe and a hot air curtain vertical air pipe; the air curtain air supply pipe is connected to the main air supply pipe, the hot air curtain vertical air pipe is connected to the air curtain air supply pipe, the hot air curtain vertical air pipe is arranged on both sides or on the upper part of the slag pool door, and the hot air curtain air outlet is arranged on the hot air curtain vertical air pipe facing the slag pool door; the heating air supply system includes a heating air supply pipe, the heating air supply pipe is connected to the main air supply pipe, the heating air supply pipe is arranged in the slag pool, and the heating air supply port is arranged on the heating air supply pipe.

[0014] The utility model provides a first electric valve between the main air supply pipe and the air curtain air supply pipe.

[0015] The utility model is provided with at least two groups of hot air curtain vertical air ducts along the longitudinal direction of both sides or the upper part of the slag pool door.

[0016] The utility model is provided with a No. 2 electric valve between the main air supply pipe and the heating air supply pipe.

[0017] The heating air supply pipe of the utility model is arranged on the upper part of the walkway side of the slag pool, on the side wall or on the upper part of the slag pool.

[0018] Compared with the prior art, the utility model has the following advantages and effects:

[0019] (1) The hot air in the main air supply duct is divided into two paths. One path is sent to the slag pool door through the hot air curtain air supply system, and the other path is sent to the slag pool through the heating air supply system, which blocks and reduces the entry of outdoor cold air and heats the cold air entering the slag pool room, so as to reduce or prevent the generation of fog in the slag pool room.

[0020] (2) Since the heater draws air from the boiler room, the temperature of this air is generally not lower than 5°C, which greatly reduces the possibility of the heater being damaged by freezing.

[0021] (3) It breaks away from the limitation of the temperature of the supplementary air source and uses a heater to heat the air to the reasonable temperature required by the design, thus achieving the best effect of comprehensively controlling the generation of fog.

[0022] (4) Since the heater inhales air from the boiler room, the boiler room and the slag pool are completely separated, and there is no obvious dust-generating device or place in the boiler room, the quality of the air inhaled by the heater from the boiler room is better, reducing the possibility of dust adhering to the heat exchange tubes and fins of the heater, thereby ensuring a longer-term heating effect of the heater.

[0023] (5) The same system is used to meet the hot air heating needs of the slag pool door and the slag pool, taking into account the effect of controlling the generation of fog when the slag pool door is opened and closed. The heating capacity of the heater is fully utilized, and the main heat supply can be concentrated on demand to supply the places that need heating.

[0024] (6) The air supply volume and air supply temperature can be adjusted according to the temperature and pressure of the slag pool, and heat can be supplied on demand, which can achieve intelligent operation and energy-saving operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The schematic diagram of the planar structure of the utility model embodiment applied in the domestic waste power plant Figure 1 , in the picture, the gate of the slag pool is closed.

[0026] Figure 2 The schematic diagram of the planar structure of the utility model embodiment applied in the domestic waste power plant Figure 2 , the door to the slag pool in the picture is open.

[0027] Figure 3The schematic diagram of the planar structure of the utility model embodiment applied in the domestic waste power plant Figure 3 In the figure, at least two groups of hot air curtain vertical air ducts are arranged, and the gate of the slag pool is closed.

[0028] Figure 4 The schematic diagram of the planar structure of the utility model embodiment applied in the domestic waste power plant Figure 4 In the figure, at least two sets of hot air curtain vertical air ducts are arranged, and the door of the slag pool is opened.

[0029] Figure 5 for Figure 2 Schematic diagram of the cross-sectional structure of AA.

[0030] Figure 6 for Figure 4 Schematic diagram of the cross-sectional structure of BB. DETAILED DESCRIPTION

[0031] The present invention will be described in detail below in conjunction with the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0032] See also Figure 1-Figure 6 The embodiment of the utility model includes a heater 10, a main air supply pipe 12, a hot air curtain air supply system and a heating air supply system.

[0033] In the domestic waste incineration power plant, the heater 10 is arranged in the boiler room 6. The heater 10 is provided with a heater air inlet 11 and a heater air outlet. According to actual needs, the heater air inlet 11 can be selected to be arranged at a relatively high position in the boiler room 6 to absorb the air with a higher temperature in the boiler room 6. After calculation, the air suction in the boiler room 6 will not affect the heating temperature of the boiler. The calorific value of the boiler and the pipeline is 2 to 3 times the fresh air load of the heating boiler room due to the air suction of the heater. The inhaled air is heated by the heater 10. A single or multiple heaters 10 can be set up for parallel use. The heater air outlet is connected to the main air supply pipe 12, and the hot air is sent to the main air supply pipe 12 by the fan in the heater 10. The hot air in the main air supply pipe 12 is divided into two paths, one is sent to the slag pool door 5 through the hot air air curtain air supply system, and the other is sent to the slag pool 2 through the heating air supply system.

[0034] The hot air curtain air supply system includes a No. 1 electric valve 13, an air curtain air supply pipe 14 and a hot air curtain vertical air pipe 19. The air curtain air supply pipe 14 is connected to the main air supply pipe 12, and a No. 1 electric valve 13 is arranged between the main air supply pipe 12 and the air curtain air supply pipe 14. The hot air curtain vertical air pipe 19 is connected to the air curtain air supply pipe 14, and the hot air curtain vertical air pipe 19 is arranged on both sides or the upper part of the slag pool door 5. A hot air curtain air outlet 15 is arranged on the hot air curtain vertical air pipe 19 facing the center direction of the slag pool door 5. The hot air blown out from the hot air curtain air outlet 15 forms a wind curtain effect, and at the same time mixes and heats the cold air invading the slag pool room 1 from the outside. See Figure 3~4 For projects with large air volume, or in order to design a more optimized hot air curtain effect, at least two groups of hot air curtain vertical air ducts 19 are arranged along the depth direction of both sides or the upper part of the slag pool door 5 to form a multi-layer hot air curtain, which can achieve better heating effect and expand the protection range of the hot air curtain.

[0035] The heating air supply system includes a No. 2 electric valve 16 and a heating air supply pipe 17. The heating air supply pipe 17 is connected to the main air supply pipe 12, and a No. 2 electric valve 16 is arranged between the main air supply pipe 12 and the heating air supply pipe 17. The heating air supply pipe 17 is arranged on the upper part of the walkway 7 of the slag pool room 1, the side wall or the upper part of the slag pool 2, and a plurality of heating air supply ports 18 are arranged on the heating air supply pipe 17. Hot air is sent to the slag pool 2 through the heating air supply pipe 17 to heat the air in the space to prevent fog from being generated in the slag pool 2.

[0036] When the slag pool door 5 of the slag pool room 1 is opened, the No. 2 electric valve 16 of the main air supply pipe 12 is closed or turned down, and all or most of the hot air heated by the heater 10 is sent to the slag pool door 5 to form a hot air curtain and heat the outdoor cold air invading the room. Using the enthalpy-humidity diagram analysis, the mixture of higher temperature air and outdoor air is not easy to produce fog, so as to improve the visibility of the slag truck 4 in the slag loading area 3 in the slag pool room 1.

[0037] When the slag pool door 5 of the slag pool room 1 is closed, the No. 2 electric valve 16 of the main air supply pipe 12 is opened or opened larger, and the opening of the No. 1 electric valve 13 is reduced or the No. 1 electric valve 13 is completely closed, and all or most of the hot air heated by the heater 10 is sent to the slag pool 2 to heat the indoor air around the slag pile to prevent fog from being generated in the slag pool 2 so as not to affect the line of sight of the slag crane control room 8.

[0038] An exhaust pipe 20 is provided at the side of the boiler slag outlet 9 in the slag pool room 1, and an exhaust port 21 is provided on the exhaust pipe 20. The exhaust pipe 20 is connected to the slag pit dust removal and demisting equipment 22 to discharge the air containing dust and mist to the slag pit dust removal and demisting equipment 22 for treatment. The exhaust frequency is not less than 4 times per hour. -1After qualified treatment, the tail gas is discharged to the outdoor discharge place, the air supply volume of the heater 10 is adjusted according to the pressure conditions in the slag pool room 1, and the air supply temperature of the heater 10 is adjusted according to the temperature conditions of the slag pool 2 or the slag loading area 3 in the slag pool room 1.

[0039] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. The hot air heating structure of the slag pool in the garbage power plant is characterized by: It includes a heater, a main air supply duct, a hot air curtain air supply system and a heating air supply system; the heater is provided with a heater air inlet and a heater air outlet, the heater air inlet is arranged in the boiler room, and the heater air outlet is connected to the main air supply duct; the hot air curtain air supply system includes an air curtain air supply duct and a hot air curtain vertical air duct; the air curtain air supply duct is connected to the main air supply duct, the hot air curtain vertical air duct is connected to the air curtain air supply duct, the hot air curtain vertical air duct is arranged on both sides or on the upper part of the slag pool door, and the hot air curtain air outlet is arranged on the hot air curtain vertical air duct facing the slag pool door; the heating air supply system includes a heating air supply duct, the heating air supply duct is connected to the main air supply duct, the heating air supply duct is arranged in the slag pool, and a heating air supply outlet is arranged on the heating air supply duct.

2. The hot air heating structure between slag pools in a garbage power plant according to claim 1 is characterized by: A No. 1 electric valve is arranged between the main air supply duct and the air curtain air supply duct.

3. The hot air heating structure between slag pools in a garbage power plant according to claim 1 is characterized by: At least two groups of hot air curtain vertical air ducts are arranged along the longitudinal direction of both sides or the upper part of the slag pool door.

4. The hot air heating structure between slag pools in a garbage power plant according to claim 1 is characterized by: A No. 2 electric valve is arranged between the main air supply pipe and the heating air supply pipe.

5. The hot air heating structure between slag pools in a garbage power plant according to claim 1 is characterized by: The heating air supply pipe is arranged on the upper part of the walkway side of the slag pool, on the side wall or on the upper part of the slag pool.

Images