Novel low-calorific-value solid waste smoldering treatment device

Abstract

The utility model discloses a novel low-calorific-value solid waste smoldering treatment device, and belongs to the field of energy conservation and environmental protection. The device comprises a mixing tank and a smoldering furnace, the mixing tank is connected with the upper part of the smoldering furnace, the bottom of the smoldering furnace is provided with a high-temperature gas valve and an air valve, the high-temperature gas valve and the air valve are connected with a gas distribution disc through pipelines, a filler supporting plate is arranged above the gas distribution disc, and the top of the smoldering furnace is provided with a flue gas outlet. According to the device, smoldering of the low-heating-value solid waste along with the incinerator can be carried out, the disposal cost can be effectively reduced, and meanwhile the disposal efficiency of the incinerator can be improved. Meanwhile, the treatment device is simple in structure and low in cost, and has a great application prospect.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of energy saving and environmental protection, specifically relates to a novel low heat value solid waste smoldering treatment device. BACKGROUND

[0002] The low heat value solid waste has low calorific value, and additional combustible substances need to be added for combustion during incineration, which greatly increases the treatment cost, so that the incineration treatment cost of the low heat value solid waste reaches 600 yuan / ton (taking sludge with 80% moisture content as an example). As a new type of thermal disposal technology for low heat value organic solid waste, the smoldering technology optimizes the heat and mass transfer process by using porous media, so that high-moisture organic solid waste can be directly smoldered and disposed without external heat assistance. Therefore, the smoldering technology has become a research hotspot technology for efficient volume reduction and harmless treatment of low heat value solid waste.

[0003] Application No. CN200410098692.4 discloses a method for treating municipal sludge, which preheats the sludge in a heat exchanger, mixes it with high-pressure steam, and then puts it into a reactor. The sludge is concentrated and dewatered by gravity to form a dewatered cake, which is used as fuel to be re-injected into a boiler for incineration. This device needs to preheat the sludge and requires high-pressure equipment, so the operation cost is relatively high. As a low heat value substance, the mixed burning directly affects the incineration efficiency of the incinerator, which may affect the normal operation of the whole system. Application No. CN202310173734.9 discloses a small-scale sludge drying and incineration device and an incineration method thereof. The method rotates and moves up and down the electric heating rod to stir the wet sludge while heating it to dry the moisture in the wet sludge, avoiding the influence of high moisture content of the wet sludge on the incineration work. However, this method still needs to add additional combustible substances for incineration of low heat value sludge, which also increases the cost and makes it difficult to realize practical commercial application. UTILITY MODEL CONTENTS

[0004] The utility model aims at realizing low-cost and efficient smoldering treatment of low heat value solid waste. At the same time, the flue gas output by the device is re-transported to the incinerator system, realizing the collaborative and efficient stable operation of the incinerator and the smoldering furnace.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] A novel low heat value solid waste smoldering treatment device, which comprises a mixing tank and a smoldering furnace, the mixing tank is connected with the upper part of the smoldering furnace, the bottom of the smoldering furnace is provided with a high-temperature gas valve and an air valve, the high-temperature gas valve and the air valve are connected with a gas distribution disc through pipelines, the upper part of the gas distribution disc is provided with a filler support plate, and the top of the smoldering furnace is provided with a flue gas outlet.

[0007] The utility model technical scheme, the output total pipeline of flue gas export is equipped with the gas outlet tee bend valve, one output end of the gas outlet tee bend valve is connected with the incinerator, and the other output end is connected with the heat exchanger.

[0008] The utility model technical scheme, the smoldering furnace is equipped with a plurality of temperature detectors at the position of different heights.

[0009] The utility model technical scheme, the gas distribution disc is arranged obliquely.

[0010] The utility model technical scheme, the mixing tank is connected with the upper portion of the smoldering furnace through the conveyer belt.

[0011] The utility model technical scheme, the middle portion of the smoldering furnace is equipped with the slag outlet.

[0012] In some specific technical schemes, the device mainly includes a feeding system, a smoldering system, an air inlet system and an air outlet system; the smoldering system serves as a main reactor to complete the smoldering disposal process of solid waste, and the feeding system, the air inlet system and the air outlet system provide functions such as compatibility and transportation of solid waste, input of high-temperature gas and air, and discharge of high-temperature waste gas and low-temperature waste gas for the smoldering system.

[0013] The utility model technical scheme, the feeding system has a mixing tank and a conveyer belt; two sections of the conveyer belt are connected with the mixing tank and a feeding port respectively.

[0014] The utility model technical scheme, the smoldering system includes a feeding port, a slag outlet, a smoldering furnace, a flue gas outlet, a filler support plate and a temperature detector.

[0015] The utility model technical scheme, the air inlet system includes an air inlet device and a gas distribution disc, and the air inlet device includes an air source, an air valve, a high-temperature gas source and a high-temperature gas valve.

[0016] The utility model technical scheme, the air outlet system includes an air outlet pipe, an air outlet tee bend valve, an incinerator and a heat exchanger.

[0017] The utility model technical scheme, the conveyer belt is provided with a transmission motor at both ends.

[0018] The utility model technical scheme, the feeding port and the slag outlet are arranged on the left side of the smoldering furnace, and the air outlet is arranged on the top of the smoldering furnace.

[0019] The utility model technical scheme, the filler support plate is located on the upper portion of the gas distribution disc and closely attached thereto; meanwhile, the filler support plate is located on the lower portion of the smoldering furnace.

[0020] The air valve and the high-temperature gas valve are both provided with airflow non-return function.

[0021] In the utility model technical scheme, the temperature detector is two and is located on the furnace wall of both ends of the smoldering furnace, and the height difference of the two temperature detectors is 40% to 60% of the height of the smoldering furnace.

[0022] In the utility model technical scheme, the horizontal inclination angle of the filler support plate and the gas distribution disc is 30 ° to 40 °.

[0023] The novel low-heat-value solid waste smoldering treatment device is used for low-heat-value solid waste treatment.

[0024] The utility model has the advantages of the following:

[0025] The system realizes effective volume reduction and harmless treatment of low-heat-value solid waste, and has the following advantages: (1) the device is a low-heat-value solid waste treatment device, uses high-temperature flue gas generated by the incinerator as a smoldering heat source, greatly reduces energy consumption in the smoldering ignition process, and after the high-temperature flue gas is absorbed by the smoldering material and becomes low-temperature flue gas, the low-temperature flue gas is transported to the heat exchanger in the incineration system, so that the cooling effect of the heat exchanger is effectively improved.

[0026] (2) when the smoldering reaction proceeds spontaneously and generates high-temperature waste gas, due to the temperature, a part of volatile substances and combustible gases exist in the waste gas at this time, the exhaust tee valve of the control device transports the waste gas to the incinerator for further incineration treatment to achieve harmless treatment, and the harmless treatment efficiency of the smoldering material is greatly improved.

[0027] (3) the device can be used in cooperation with a traditional incinerator, and part of the treatment units such as flue gas purification equipment and fan equipment can be shared, so that the construction cost of the device can be reduced, and the device has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The utility model discloses a novel low-heat-value solid waste smoldering treatment device.

[0029] The meanings of the reference signs are as follows: 1 is a mixing tank, 2 is a conveying belt, 3 is a transmission motor, 4 is a feeding port, 5 is a flue gas outlet, 6 is an exhaust pipe, 7 is an exhaust tee valve, 8 is an incinerator, 9 is a heat exchanger, 10 is an air source, 11 is a high-temperature gas valve, 12 is a high-temperature gas source, 13 is a gas distribution disc, 14 is a filler support plate, 15 is a slag outlet, 16 is a temperature detector, 17 is a smoldering furnace, and 18 is an air valve. DETAILED DESCRIPTION

[0030] The utility model makes further illustration in combination with the embodiment, but the protection scope of the utility model is not limited to this:

[0031] As Figure 1 The novel low heat value solid waste smoldering treatment device, the bottom of the smoldering furnace 17 is equipped with a high-temperature gas valve 11 and an air valve 18, the high-temperature gas valve 11 and the air valve 18 are connected with a gas distribution disc 13 through a pipeline, and the top of the gas distribution disc 13 is equipped with a filler support plate 14.

[0032] An output end of the gas outlet three-way valve 7 is connected with an incinerator 8, and the other output end is connected with a heat exchanger 9.

[0033] The novel low heat value solid waste smoldering treatment device is characterized in that a plurality of temperature detectors 16 are arranged at different heights of the smoldering furnace 17, the gas distribution disc 13 is arranged obliquely, the mixing tank 1 is connected with the upper part of the smoldering furnace 17 through a conveying belt 2, and the middle part of the smoldering furnace 17 is equipped with a slag outlet 15.

[0034] In some more specific technical solutions, the device mainly includes a feeding system, a smoldering system, an air inlet system and an air outlet system. The feeding system has a mixing tank 1 and a conveying belt 2, the conveying belt 2 is provided with a transmission motor 3 at both ends, and the two sections of the conveying belt are connected with the mixing tank 1 and a feeding port 4 respectively. The smoldering system includes the feeding port 4, a slag outlet 15, a smoldering furnace 17, a flue gas outlet 5, a filler support plate 14 and a temperature detector 16. The feeding port 4 and the slag outlet 15 are arranged on the left side of the smoldering furnace 17, and the flue gas outlet 5 is arranged on the top of the smoldering furnace 17. The two temperature detectors 16 are arranged on the furnace walls at both ends of the smoldering furnace 17, and the height difference between the two temperature detectors 16 is 40% of the height of the smoldering furnace 17. The filler support plate 14 and the gas distribution disc 13 are arranged on the lower part of the smoldering furnace 17, the filler support plate 14 is arranged on the upper part of the gas distribution disc 13 and closely attached to the gas distribution disc 13, and the horizontal inclination angle between the filler support plate 14 and the gas distribution disc is 30°. The air inlet system includes an air inlet device and a gas distribution disc 13, the air inlet device includes an air source 10, an air valve 18, a high-temperature gas source 12 and a high-temperature gas valve 11. The air valve 18 and the high-temperature gas valve 11 are both provided with a gas flow check function. The air outlet system includes an air outlet pipe 6, a gas outlet three-way valve 7, an incinerator 8 and a heat exchanger 9, and the gas outlet three-way valve 7 is arranged at the end of the air outlet pipe 6 to control the gas flow direction.

[0035] The specific working process and principle of the utility model are as follows:

[0036] The low-calorific value solid waste to be treated and other ingredients are put into a mixing tank for mixing and stirring, and then are conveyed into the smoldering furnace through a feeding port by a conveying belt. After the filling is completed, the feeding port is closed, and the high-temperature gas valve is opened to introduce high-temperature gas into the smoldering furnace. When the gas is cooled after being absorbed by the heat of the smoldering furnace, the cooled gas is introduced into the heat exchanger through the gas outlet three-way valve. As the heat accumulates in the smoldering furnace, the smoldering reaction in the furnace is triggered, and at this time, the air valve is opened to introduce air to accelerate the ignition reaction. After a period of reaction, when the temperature probe detects that the smoldering temperature reaches 300 DEG C or more, the gas outlet three-way valve is connected to the incinerator to make the volatile organic compounds in the solid waste and part of the combustible gas generated by smoldering to be incinerated for the second time to achieve harmless disposal. At the same time, the amount of high-temperature gas is reduced and the amount of air is continuously increased until the reaction is completed. After the reaction is completed, the slag outlet is opened to take out the ash after reaction on the inclined filling support plate.

[0037] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any skilled person in the art can make some changes or modifications to the above disclosed technical content without departing from the scope of the technical solution of the present application, and any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present application are still within the scope of the technical solution of the present application.

[0038] It should be noted that the structure, proportion, size and the like shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification, so as to be understood and read by those skilled in the art, and do not limit the implementation conditions of the present application, and therefore do not have technical significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effect and purpose of the present application, should still fall within the scope of the technical content disclosed by the present application.

Claims

1. A novel low-calorific-value solid waste smoldering treatment device, characterized by comprising: The device comprises a mixing tank (1) and a smoldering furnace (17), the mixing tank (1) is connected with the upper part of the smoldering furnace (17), the bottom of the smoldering furnace (17) is provided with a high-temperature gas valve (11) and an air valve (18), the high-temperature gas valve (11) and the air valve (18) are connected with a gas distribution disc (13) through pipelines, the upper part of the gas distribution disc (13) is provided with a filler support plate (14), the top of the smoldering furnace (17) is provided with a flue gas outlet (5); a gas outlet tee valve (7) is arranged in the output pipeline of the flue gas outlet (5), one output end of the gas outlet tee valve (7) is connected with an incinerator (8), and the other output end is connected with a heat exchanger (9).

2. The novel low-calorific-value solid waste smoldering treatment device according to claim 1, characterized by, The smoldering furnace (17) is provided with a plurality of temperature detectors (16) at different heights.

3. The novel low-calorific-value solid waste smoldering treatment device according to claim 1, characterized by, The gas distribution disc (13) is arranged obliquely.

4. The novel low-calorific-value solid waste smoldering treatment device according to claim 1, characterized by The mixing tank (1) is connected with the upper part of the smoldering furnace (17) through a conveying belt (2).

5. The novel low-calorific-value solid waste smoldering treatment device according to claim 1, characterized by The middle part of the smoldering furnace (17) is provided with a slag outlet (15).

Images