Comprehensive treatment system for organic solid wastes in villages and towns

Abstract

The utility model relates to the technical field of organic solid waste treatment, and provides a comprehensive treatment system for organic solid wastes in villages and towns. The system comprises a high-calorific-value waste bin, a crusher, a low-calorific-value bin, a stirrer, a dryer, an incinerator, a heat exchanger and a flue gas purification system. The heat exchanger recovers flue gas heat to generate steam which is supplied to the drying machine, so that the heat value is increased while the water content of the low-heat-value organic solid waste is reduced. And the dried low-calorific-value organic solid waste enters an incinerator, the stable combustion temperature can be ensured, and finally environment-friendly up-to-standard emission is achieved through a flue gas purification system. According to the system, reduction, harmlessness and recycling co-treatment of the organic solid waste is realized, and the treatment cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of organic solid waste disposal, in particular to a comprehensive disposal system for collaboratively disposing of various organic solid wastes in villages and towns. Background Art

[0002] Organic solid waste is solid waste with organic matter as the main component, which is generated by people in production, life and other activities. At the village and town level, organic solid waste mainly includes domestic garbage, straw, branches, agricultural film, sludge, livestock and poultry manure, fruit and vegetable garbage, etc. According to the water content and low calorific value of organic solid waste, it can be roughly divided into high calorific value organic solid waste and low calorific value organic solid waste.

[0003] Among them, high calorific value organic solid waste mainly includes domestic garbage, straw, branches, agricultural film, etc., which are currently mainly disposed of by sanitary landfill. This method requires a lot of land and there is a risk of groundwater pollution due to poor management; low calorific value organic solid waste mainly includes sludge, livestock and poultry manure, fruit and vegetable waste, etc., which are currently mainly disposed of by composting. This method occupies a large area, produces odor in the process that affects the lives of surrounding residents, and has high treatment costs.

[0004] Therefore, there is an urgent need for a comprehensive disposal system that can save space and reduce the cost of organic solid waste treatment. Utility Model Content

[0005] The purpose of the utility model is to solve the deficiencies of the existing technology and provide a comprehensive disposal system for organic solid waste in villages and towns. Relying on an incinerator, the heat generated by the combustion of high-calorific value organic solid waste is used to pre-dry low-calorific value organic solid waste, and then the waste is burned in the incinerator. While reducing the moisture content, the calorific value of the low-calorific value organic solid waste is also increased to ensure that the incinerator can operate stably, avoid large fluctuations in combustion temperature and flue gas pollutants, and finally achieve environmentally friendly emission standards through the flue gas purification link.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A comprehensive disposal system for organic solid waste in villages and towns, comprising a high calorific value waste bin and a crusher, wherein the discharge port of the high calorific value waste bin is connected to the feed port of the crusher;

[0008] It also includes a low-calorific value silo, a stirrer, a dryer, and an incinerator. The discharge port of the low-calorific value silo is connected to the feed port of the stirrer, and the discharge port of the stirrer is connected to the low-calorific solid waste feed port provided on the dryer; it also includes a heat exchanger and a flue gas purification system. The incinerator is provided with a solid waste feeding port, a slag discharge port, and a hot flue gas outlet. The solid waste feeding port is connected to the discharge port of the crusher and the low-calorific solid waste discharge port provided on the dryer.

[0009] Preferably, the heat exchanger includes a high-temperature flue gas inlet, a high-temperature flue gas outlet, a condensed water inlet and a steam outlet, the high-temperature flue gas inlet is connected to the hot flue gas outlet, and the steam outlet is connected to the dryer; the heat exchanger converts the heat energy of the high-temperature flue gas into the heat energy in low-pressure saturated steam, and then supplies the low-pressure saturated steam to the dryer for use.

[0010] Preferably, the dryer adopts an indirect heat exchange drying method. The dryer is connected to the steam outlet of the heat exchanger through the steam inlet and is connected to the water feed pump through the condensed water outlet. The heat source is the low-pressure saturated steam provided by the heat exchanger. The condensed water after steam heat exchange is transported back to the heat exchanger through the condensed water inlet by the water feed pump for recycling.

[0011] Preferably, the flue gas purification system includes a deacidification tower, a dust collector, and an induced draft fan, and the deacidification tower, dust collector, and induced draft fan are connected in series in sequence.

[0012] Preferably, the dust collector is a bag dust collector.

[0013] Preferably, the incinerator is provided with an auxiliary fuel injection port.

[0014] The utility model discloses a comprehensive disposal system for organic solid waste in villages and towns, which has the following beneficial effects.

[0015] First, by incinerating organic solid waste, a good volume and quantity reduction effect can be achieved. The heat generated by incineration can be utilized through waste heat recovery, and the bottom ash of the incinerator also has certain resource utilization value. One system can achieve the coordinated disposal of multiple organic solid wastes in terms of volume reduction, harmlessness, and resource utilization.

[0016] Secondly, by using a heat exchanger to recover the heat in the flue gas to generate steam, and then using the steam through a dryer to remove moisture from low-calorific value organic solid waste, heat balance is achieved in the solid waste treatment process. The dried organic solid waste then enters the incinerator for combustion, ensuring the stability of the incinerator's combustion temperature and saving disposal costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a comprehensive disposal system for organic solid waste in villages and towns in the utility model.

[0018] Figure 2 It is a schematic diagram of the incinerator in the present utility model.

[0019] Figure 3 It is a schematic diagram of the heat exchanger in the present utility model.

[0020] Figure 4 It is a schematic diagram of the dryer in the present utility model.

[0021] Figure 5 This is a schematic diagram of the flue gas purification system in the present utility model.

[0022] In the attached figure: 1. High calorific value waste silo; 2. Crusher; 3. Incinerator; 31. Solid waste feeding port; 32. Slag discharge port; 33. Hot flue gas outlet; 34. Fuel-aiding fuel feeding port; 4. Low calorific value silo; 5. Agitator; 6. Dryer; 61. Low calorific value solid waste feeding port; 62. Low calorific value solid waste discharge port; 63. Steam inlet; 64. Condensate outlet; 7. Heat exchanger; 71. High-temperature flue gas inlet; 72. High-temperature flue gas outlet; 73. Condensate inlet; 74. Steam outlet; 8. Flue gas purification system; 81. Deacidification tower; 82. Dust collector; 83. Induced draft fan; 9. Water pump. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0025] The utility model discloses a comprehensive disposal system for organic solid waste in villages and towns. When disposing of high calorific value organic solid waste and low calorific value organic solid waste, it relies on an incinerator 3 and uses the heat generated by the combustion of the high calorific value organic solid waste to dry the low calorific value organic solid waste before it enters the incinerator 3 for combustion. This reduces the moisture content of the low calorific value organic solid waste while also increasing the calorific value, thereby achieving the effect of reducing volume and amount and saving costs.

[0026] Reference Figure 1 A comprehensive disposal system for organic solid waste in villages and towns, comprising a high calorific value waste bin 1 and a crusher 2, wherein the discharge port of the high calorific value waste bin 1 and the feed port of the crusher 2 are connected via a belt conveyor;

[0027] It also includes a low calorific value silo 4, a stirrer 5, a dryer 6, and an incinerator 3. The dryer 6 is a disc or paddle steam dryer. As shown in the figure, the material in this scheme flows in the direction indicated by the arrow. The discharge port of the low calorific value silo 4 is connected to the feed port of the stirrer 5 through a screw conveyor. The discharge port of the stirrer 5 is connected to the low calorific solid waste feed port 61 provided on the dryer 6 through a screw conveyor; it also includes a heat exchanger 7 and a flue gas purification system 8, such as Figure 2As shown, the incinerator 3 is provided with a solid waste feeding port 31, a slag discharge port 32, and a hot flue gas outlet 33. The solid waste feeding port 31 is connected to the discharge port of the crusher 2 and the low-calorific solid waste discharge port 62 provided on the dryer 6 through a belt conveyor; the hot flue gas outlet 33 is connected to the heat exchanger 7 through a pipeline to provide a heat source. The heat exchanger 7 provides the heat energy attached to the high-temperature flue gas to the dryer 6 to dry the low-calorific value organic solid waste. The low-temperature flue gas output by the heat exchanger 7 enters the flue gas purification system 8 for harmless treatment.

[0028] Specific examples Figure 3 As shown, the heat exchanger 7 includes a high-temperature flue gas inlet 71, a high-temperature flue gas outlet 72, a condensed water inlet 73 and a steam outlet 74. The high-temperature flue gas inlet 71 is connected to the hot flue gas outlet 33 through a pipeline, and the steam outlet 74 is connected to the dryer 6 through a pipeline. The heat exchanger 7 converts the heat energy of the high-temperature flue gas into the heat energy of low-pressure saturated steam, and then supplies the low-pressure saturated steam to the dryer 6 for use. Figure 4 As shown, the dryer 6 adopts an indirect heat exchange drying method. The dryer 6 is connected to the steam outlet 74 of the heat exchanger 7 through a pipe via the steam inlet 63, and is connected to the water supply pump 9 through the condensed water outlet 64. The heat source is the low-pressure saturated steam provided by the heat exchanger 7. The rated steam pressure of the saturated steam is about 0.8 MPa. The condensed water after the steam heat exchange is transported back to the heat exchanger 7 through the condensed water inlet 73 by the water supply pump 9 for recycling. By using the heat exchanger 7 to recover the heat in the flue gas to generate steam, and then using the steam to remove the moisture of the low calorific value organic solid waste through the dryer 6, the heat balance in the solid waste treatment process is achieved. The dried organic solid waste is then fed into the incinerator 3 for combustion, which can ensure the stability of the combustion temperature of the incinerator 3 and save the disposal cost. Please refer to Figure 5 The flue gas purification system 8 includes a deacidification tower 81, a dust collector 82, and an induced draft fan 83. The low-temperature flue gas connected to the deacidification tower 81 is purified, and the treated flue gas is passed into the dust collector 82 for filtration. The induced draft fan 83 is arranged at the rear end of the dust collector 82 to maintain the negative pressure of the system. Since the smoke atmosphere produced after the organic solid waste is fully burned in the incinerator 3 is mainly acidic, the deacidification tower 81 is used for deacidification treatment. Specifically, the deacidification tower 81 adopts a semi-dry deacidification method of spraying lime slurry for purification. Since the smoke at this time often contains hazardous wastes such as heavy metals and dioxins, the dust collector 82 is also required to filter and collect this hazardous waste. Specifically, a bag dust removal method is adopted. The fly ash filtered by the dust collector 82 is a hazardous waste containing heavy metals and dioxins, which is disposed of separately.

[0029] In this embodiment, the combustion temperature of the incinerator 3 is not lower than 850°C. The high-temperature flue gas (about 1000°C) generated after combustion is passed through the heat exchanger 7 to generate steam. The low-temperature flue gas (about 250°C) after heat exchange is purified by the deacidification tower 81 and the dust collector 82 and then meets the emission standards. The bottom ash is discharged through the slag discharge port 32. After the recyclable metals are sorted out, it can be used for roadbed paving, concrete aggregate, etc. By incinerating organic solid waste, a good volume reduction and amount reduction effect can be achieved. The heat generated by incineration is utilized by waste heat recovery. The bottom ash of the incinerator 3 also has a certain resource utilization value. A set of systems can realize the coordinated disposal of multiple organic solid wastes in terms of volume reduction, harmlessness, and resource utilization.

[0030] In this embodiment, in order to ensure safety and energy saving, all pipes and equipment with medium temperatures greater than 50°C need to be insulated.

[0031] In order to supplement high-energy fuel when the combustion effect of organic solid waste is not good, the high-energy fuel can be natural gas or coal to assist the combustion of organic solid waste. An auxiliary fuel injection port 34 is provided on the incinerator 3.

[0032] In this embodiment, high calorific value solid waste is first put into the incinerator 3, and the heat energy generated by the incinerator 3 evaporates the water in the heat exchanger 7 into water vapor, and the water vapor is passed into the dryer 6 before the low calorific value solid waste is input into the dryer.

[0033] The high calorific value silo 1, crusher 2, incinerator 3, heat exchanger 7, deacidification tower 81, dust collector 82, induced draft fan 83, low calorific value silo 4, stirrer 5, dryer 6, water pump 9, pipes and related accessories involved in connecting each device, automatic control instrument equipment of the control device, etc. in this embodiment are all existing technologies.

[0034] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Replacements may include partial structures, devices, or method steps, or they may be complete technical solutions. Equivalent replacements or modifications based on the technical solution and its concept of the present invention are intended to fall within the scope of protection of the present invention.

Claims

1. A comprehensive disposal system for organic solid waste in villages and towns, characterized by: It comprises a high calorific value waste bin (1) and a crusher (2), wherein the discharge port of the high calorific value waste bin (1) is connected to the feed port of the crusher (2); It also includes a low calorific value silo (4), a stirrer (5), a dryer (6), and an incinerator (3), wherein the discharge port of the low calorific value silo (4) is connected to the feed port of the stirrer (5), and the discharge port of the stirrer (5) is connected to the low calorific value solid waste feed port (61) provided on the dryer (6); The incinerator (3) further comprises a heat exchanger (7) and a flue gas purification system (8). The incinerator (3) is provided with a solid waste feeding port (31), a slag discharge port (32), and a hot flue gas outlet (33). The solid waste feeding port (31) is connected to the discharge port of the crusher (2) and the low-heat solid waste discharge port (62) provided on the dryer (6); the hot flue gas outlet (33) is connected to the heat exchanger (7), and the heat exchanger (7) provides high-temperature flue gas to the dryer (6). The low-temperature flue gas output by the heat exchanger (7) is connected to the flue gas purification system (8).

2. A comprehensive disposal system for organic solid waste in villages and towns according to claim 1, characterized in that: The heat exchanger (7) comprises a high-temperature flue gas inlet (71), a high-temperature flue gas outlet (72), a condensed water inlet (73) and a steam outlet (74); the high-temperature flue gas inlet (71) is connected to the hot flue gas outlet (33); and the steam outlet (74) is connected to the dryer (6).

3. A comprehensive disposal system for organic solid waste in villages and towns according to claim 2, characterized in that: The dryer (6) adopts an indirect heat exchange drying method. The dryer (6) is connected to the steam outlet (74) of the heat exchanger (7) through the steam inlet (63), and is connected to the water supply pump (9) through the condensed water outlet (64). The condensed water after steam heat exchange is transported back to the heat exchanger (7) through the condensed water inlet (73) by the water supply pump (9) for recycling.

4. A comprehensive disposal system for organic solid waste in villages and towns according to claim 1, characterized in that: The slag generated by the incinerator (3) is discharged through a slag discharge port (32).

5. The comprehensive disposal system for organic solid waste in villages and towns according to claim 1, characterized in that: The flue gas purification system (8) comprises a deacidification tower (81), a dust collector (82), and an induced draft fan (83), wherein the deacidification tower (81), the dust collector (82), and the induced draft fan (83) are sequentially connected in series.

6. A comprehensive disposal system for organic solid waste in villages and towns according to claim 5, characterized in that: The dust collector (82) is a bag type dust collector.

7. The comprehensive disposal system for organic solid waste in villages and towns according to claim 1, characterized in that: The incinerator (3) is provided with an auxiliary fuel injection port (34).

Images