A method based on refined co-combustion of multi-source industrial organic solid waste

Abstract

The present invention discloses a method for finely blending and incinerating multi-source industrial organic solid waste, comprising the following steps: coarsely crushing and air-selecting the industrial organic solid waste to separate light industrial organic solid waste and heavy industrial organic solid waste; the heavy industrial organic solid waste is fed into an incinerator and incinerated with domestic waste, and the blending ratio of the heavy industrial organic solid waste is determined based on combustion data; the light industrial organic solid waste is pyrolyzed to produce pyrolytic carbon, pyrolytic oil, and pyrolytic gas, and the pyrolytic gas is fed into an incinerator and incinerated with domestic waste, and the blending ratio of the light industrial organic solid waste is determined based on combustion data; the heavy industrial organic solid waste and the pyrolytic gas can each be blended and incinerated with domestic waste, or the heavy industrial organic solid waste and the pyrolytic gas can be blended and incinerated with domestic waste together. The present invention adjusts the blending ratio based on three multi-angle references: the properties of the industrial organic solid waste itself, the boiler load during the blending process, and flue gas purification data, to ensure high economic efficiency and low environmental pollution.

Description

Technical Field

[0001] The present invention relates to the technical field related to multi-source industrial organic solid waste treatment, and in particular to a method based on refined co-combustion of multi-source industrial organic solid waste. Background Art

[0002] Currently, the resource utilization of sorted waste has led to a decrease in the amount of waste disposed of by incineration companies. Meanwhile, accelerated urbanization has led to a rapid increase in the production of industrial organic solid waste, but its overall disposal rate remains low. Therefore, the incineration of industrial organic solid waste in municipal solid waste incineration facilities can not only reduce the amount of industrial solid waste, but also, to a certain extent, compensate for the insufficient production of municipal solid waste.

[0003] Industrial organic solid waste comes in many varieties, generally with high calorific values ​​and high levels of pollutants like sulfur and chlorine. During co-incineration, the excessively high calorific value of some types of industrial organic solid waste and uneven mixing can easily lead to unstable combustion. Fluctuations in sulfur and chlorine content require timely adjustments to flue gas purification efforts. Therefore, meticulously categorizing industrial organic solid waste for co-incineration is essential. Summary of the Invention

[0004] The present invention aims to propose a method for the refined co-incineration of multi-source industrial organic solid waste. This method involves finely classifying industrial organic solid waste and co-incinerating it according to the different characteristics of light and heavy industrial organic solid waste. During the co-incineration process, the co-incineration ratio is dynamically adjusted based on incinerator combustion data. Furthermore, by recycling the characteristics of the pyrolysis byproducts of the industrial organic solid waste into the co-incineration process, this method helps reduce pollution, minimize the amount of industrial solid waste processed, and, to a certain extent, compensate for the insufficient production of domestic waste, thereby overcoming the shortcomings of the existing technology.

[0005] To achieve this object, the present invention adopts the following technical solutions.

[0006] A method based on refined co-combustion of multi-source industrial organic solid waste, including an industrial organic solid waste pretreatment process, a light industrial organic solid waste co-combustion process, a heavy industrial organic solid waste co-combustion process, a sulfur and chlorine pollutant feedback co-combustion ratio process, and a light industrial organic solid waste pyrolysis by-product recycling process.

[0007] The above five processes include the following steps.

[0008] A. The pretreatment process of industrial organic solid waste includes rough selection, air separation and classification of industrial organic solid waste, and fine classification into light industrial organic solid waste and heavy industrial organic solid waste.

[0009] B. The co-combustion process of light industrial organic solid waste includes crushing the light industrial organic solid waste sorted in step A and then pyrolyzing it to obtain pyrolysis charcoal, pyrolysis oil and pyrolysis gas. The pyrolysis gas enters the incinerator and is co-combusted with domestic waste. The co-combustion ratio of light industrial organic solid waste is determined based on the combustion data.

[0010] C. The co-combustion process of heavy industrial organic solid waste mainly involves the heavy industrial organic solid waste entering the incinerator and being co-combusted with domestic waste, and the co-combustion ratio of the heavy industrial organic solid waste is determined based on the combustion data.

[0011] D. The process of feedback and incineration ratio of sulfur and chlorine pollutants includes adjusting the opening of the lime slurry in the reaction tower according to the sulfur dioxide and hydrogen chloride content of heavy industrial organic solid waste and pyrolysis gas, and further adjusting the incineration ratio of heavy industrial organic solid waste and pyrolysis gas according to the flue gas purification data.

[0012] E. The process for recycling by-products from pyrolysis of light industrial organic solid waste includes the following: the by-product pyrolysis carbon obtained from pyrolysis can be sprayed into the flue after the reaction tower to adsorb acidic gases, dioxins and heavy metals, and the by-product pyrolysis oil can be further refined.

[0013] Preferably, the pyrolysis gas in step B is mixed with primary / secondary air and uniformly enters the incinerator to be burned together with domestic waste.

[0014] Preferably, the heavy industrial organic solid waste in step C is mixed evenly with domestic waste and then fed into the incinerator for combustion together with the domestic waste.

[0015] Preferably, the combustion condition data in step B and step C include boiler load, calorific value of heavy industrial organic solid waste, calorific value of pyrolysis gas, and flue gas purification data.

[0016] Preferably, the flue gas purification data in step D is obtained by adjusting the opening of the lime slurry in the purification reaction tower according to the sulfur dioxide and hydrogen chloride content in the flue gas.

[0017] Preferably, the pyrolytic carbon obtained by pyrolysis of the light industrial organic solid waste in step E can be sprayed into the flue after the purification reaction tower to adsorb acidic gases, dioxins and heavy metals.

[0018] Preferably, when the calorific value of the heavy industrial organic solid waste in step C is between 15,000 kJ / kg and 25,000 kJ / kg, the single co-combustion ratio is up to 40% while ensuring normal operation.

[0019] Preferably, when the calorific value of the pyrolysis gas in step B is between 30,000 and 50,000 kJ / m3, the maximum single blending ratio is 20% while ensuring normal operation.

[0020] Preferably, when heavy industrial organic solid waste, pyrolysis gas and domestic garbage are co-combusted, the co-combustion ratio cannot be higher than the maximum ratio of the co-combustion of a single component.

[0021] The beneficial effects of the present invention are:

[0022] 1. In response to the rapid growth of industrial organic solid waste production caused by the accelerated urbanization process, but its comprehensive disposal rate is still low, industrial solid waste can be effectively reduced and treated by incinerating it with domestic waste.

[0023] 2. The resource utilization after garbage classification has reduced the amount of garbage disposed of by incineration companies. Faced with the problem of insufficient garbage production, garbage incineration power plants mix industrial organic solid waste with domestic garbage to make up for the insufficient incineration load caused by the increasingly reduced production of biological waste.

[0024] 3. While industrial organic solid waste generally has a high calorific value, it is diverse and contains high levels of pollutants such as sulfur and chlorine. Excessively high calorific value and uneven mixing can easily lead to unstable combustion and fluctuating sulfur and chlorine content, making extensive co-combustion unsuitable. Therefore, the refined co-combustion method proposed in this invention balances co-combustion performance with environmental protection.

[0025] 4. In the process of refined co-combustion, the pyrolysis charcoal produced as a by-product of pyrolysis of light industrial organic solid waste is rationally utilized, recycled to the reaction tower and then sprayed into the flue to adsorb acidic gases, dioxins and heavy metals. The pyrolysis oil can be further refined, and the resource utilization efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a process flow chart for the method of incinerating multi-source industrial organic solid waste with domestic garbage based on refined incineration. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below with reference to the accompanying drawings and specific embodiments.

[0028] A method based on refined co-combustion of multi-source industrial organic solid waste, including an industrial organic solid waste pretreatment process, a light industrial organic solid waste co-combustion process, a heavy industrial organic solid waste co-combustion process, a sulfur and chlorine pollutant feedback co-combustion ratio process, and a light industrial organic solid waste pyrolysis by-product recycling process.

[0029] The above five processes include the following steps.

[0030] A. The pretreatment process of industrial organic solid waste includes rough selection, air separation and classification of industrial organic solid waste, and fine classification into light industrial organic solid waste and heavy industrial organic solid waste.

[0031] Heavy industrial organic solid waste is mostly high-density industrial solid waste such as rubber, leather and fabric, with a calorific value of about 20,000 kJ / kg. Light industrial organic solid waste is mostly low-density industrial solid waste such as sponge, foam, plastic and paper, with a calorific value of about 30,000 kJ / kg, and can reach up to about 40,000 kJ / kg. Figure 1As shown, the waste is coarsely crushed and then separated by wind power to be divided into heavy industrial organic solid waste and light industrial organic solid waste.

[0032] B. The co-combustion process of light industrial organic solid waste includes crushing the light industrial organic solid waste sorted in step A and then pyrolyzing it to obtain pyrolysis charcoal, pyrolysis oil and pyrolysis gas. The pyrolysis gas enters the incinerator and is co-combusted with domestic waste. The co-combustion ratio of light industrial organic solid waste is determined based on the combustion data.

[0033] Light industrial organic solid waste is not directly used in the co-combustion process. Instead, it undergoes fine crushing and then undergoes pyrolysis to produce pyrolysis gas, pyrolysis char, and pyrolysis oil. The calorific value of the pyrolysis gas is evaluated to determine the co-combustion ratio. The sulfur and chlorine contaminants in the pyrolysis gas are also assessed to determine the lime slurry level in the subsequent purification tower. During the co-combustion process, the co-combustion ratio is adjusted based on boiler load feedback, and further adjusted by subsequent flue gas purification data collected from the chimney.

[0034] The blending ratio is adjusted based on the properties of the pyrolysis gas itself, the boiler load during the blending process, and the flue gas purification data to ensure high economic efficiency and low environmental pollution.

[0035] Preferably, the pyrolysis gas enters the incinerator by being mixed evenly with the primary / secondary air and then being incinerated with the domestic waste.

[0036] Pyrolysis gas can be fed with primary air alone, secondary air alone, or both. When the furnace combustion temperature is too high or too low, it is not suitable to feed it with primary air or secondary air. You can switch between them to stabilize the furnace combustion as soon as possible.

[0037] C. The co-combustion process of heavy industrial organic solid waste mainly involves the heavy industrial organic solid waste entering the incinerator and being co-combusted with domestic waste, and the co-combustion ratio of the heavy industrial organic solid waste is determined based on the combustion data.

[0038] The calorific value of heavy industrial organic solid waste is evaluated to determine the co-combustion ratio, and the sulfur and chlorine pollutants in the pyrolysis gas are evaluated to determine the opening of the lime slurry in the subsequent purification reaction tower. During the co-combustion process, the co-combustion ratio is adjusted by boiler load feedback, and the flue gas purification data obtained from the subsequent chimney is used to further adjust the co-combustion ratio.

[0039] The co-combustion ratio is adjusted based on the properties of heavy industrial organic solid waste, boiler load during the co-combustion process, and flue gas purification data to ensure high economic efficiency and low environmental pollution.

[0040] Preferably, the heavy industrial organic solid waste is mixed evenly with domestic waste and then fed into the incinerator for combustion together with the domestic waste.

[0041] D. The process of feedback and incineration ratio of sulfur and chlorine pollutants includes adjusting the opening of the lime slurry in the reaction tower according to the sulfur dioxide and hydrogen chloride content of heavy industrial organic solid waste and pyrolysis gas, and further adjusting the incineration ratio of heavy industrial organic solid waste and pyrolysis gas according to the flue gas purification data.

[0042] E. The process for recycling by-products from pyrolysis of light industrial organic solid waste includes the following: the by-product pyrolysis carbon obtained from pyrolysis can be sprayed into the flue after the reaction tower to adsorb acidic gases, dioxins and heavy metals, and the by-product pyrolysis oil can be further refined.

[0043] The by-products of the pyrolysis process of light industrial organic solid waste can be fully utilized. Pyrolytic carbon can be injected into the purification reaction tower to further purify the flue gas, and the pyrolysis oil can be further refined.

[0044] The present invention also proposes that heavy industrial organic solid waste and pyrolysis gas can be co-burned with domestic waste, or that heavy industrial organic solid waste and pyrolysis gas can be co-burned with domestic waste.

[0045] Preferably, when the calorific value of the heavy industrial organic solid waste is between 15,000 kJ / kg and 25,000 kJ / kg, the maximum single co-combustion ratio is 40% while ensuring normal operation.

[0046] Preferably, when the calorific value of the pyrolysis gas is between 30,000 and 50,000 kJ / m3, the maximum single blending ratio is 20% while ensuring normal operation.

[0047] Preferably, when heavy industrial organic solid waste, pyrolysis gas and domestic garbage are co-combusted, the co-combustion ratio cannot be higher than the maximum ratio of the co-combustion of a single component.

[0048] The present invention provides the blending ratios of heavy industrial organic solid waste and pyrolysis gas under different calorific value ranges when they are co-combusted separately or together. Those skilled in the art can further adjust the blending ratio based on the preferred numerical range, supplemented by the boiler load and flue gas purification data during the blending process, to achieve the technical effects of high economic efficiency and low environmental pollution.

[0049] Example 1.

[0050] Incoming industrial organic solid waste undergoes a primary crushing process, reducing its particle size to less than 200mm. It is then separated by wind power into heavy and light industrial organic solid waste. Heavy industrial organic solid waste, with a calorific value of 15,000 kJ / kg, is incinerated solely. After sorting, the heavy industrial organic solid waste is simple and stable according to its composition. A 35% incineration ratio is determined based on its calorific value and boiler load. In this state, gaseous pollutants such as HCl and SO₂ are high. Flue gas purification data feedback from the DCS at the chimney indicates that a 35% incineration ratio does not meet emission standards. Therefore, the lime regulating valve opening needs to be increased and the incineration ratio reduced to 30%. The pyrolytic char obtained from the pyrolysis of the light industrial organic solid waste can be processed to produce activated carbon, which is then injected into the flue after the reaction tower to further absorb acidic gases, dioxins, and heavy metals from the incineration flue gas. The pyrolysis oil obtained from the pyrolysis of the light industrial organic solid waste can be further refined and separated for internal use.

[0051] Example 2.

[0052] The incoming industrial organic solid waste undergoes an initial crushing process, reducing its particle size to less than 200mm. It is then separated by wind power into heavy and light industrial organic solid waste. The heavy industrial organic solid waste, with a calorific value of 25,000 kJ / kg, is incinerated solely. The sorted heavy industrial organic solid waste is simple and stable according to its composition. The incineration ratio is determined to be 10% based on its calorific value and boiler load. In this state, the content of gaseous pollutants such as HCl and SO2 is low. Flue gas purification data feedback from the DCS at the chimney determines that a 30% incineration ratio meets emission standards and requires no adjustment. The pyrolytic carbon obtained from the pyrolysis of the light industrial organic solid waste can be simply processed to produce activated carbon, which is then injected into the flue after the reaction tower to further adsorb acidic gases, dioxins, and heavy metals in the incineration flue gas. The pyrolysis oil obtained from the pyrolysis of the light industrial organic solid waste can be further refined and separated for in-plant use.

[0053] Example 3.

[0054] The incoming industrial organic solid waste undergoes an initial crushing process, reducing its particle size to less than 200mm. It is then separated by wind power into heavy and light industrial organic solid waste. The pyrolysis gas from the light industrial organic solid waste has a calorific value of 30,000 kJ / m³ and is incinerated solely. The pyrolysis gas from the sorted light industrial organic solid waste is simple and stable in composition. The incineration ratio is determined to be 20% based on its calorific value and boiler load. In this state, the content of gaseous pollutants such as HCl and SO2 is low. Flue gas purification data feedback from the DCS at the chimney determines that the 20% incineration ratio meets emission standards and does not require adjustment. The pyrolysis carbon obtained from the pyrolysis of the light industrial organic solid waste can be simply processed to produce activated carbon, which is then injected into the flue after the reaction tower to further absorb acid gases, dioxins, and heavy metals from the incineration flue gas. The pyrolysis oil obtained from the pyrolysis of the light industrial organic solid waste can be further refined and separated for internal use.

[0055] Example 4.

[0056] Incoming industrial organic solid waste undergoes a primary crushing process, reducing its particle size to less than 200mm. It is then separated by wind power into heavy and light industrial organic solid waste. The pyrolysis gas from the light industrial organic solid waste has a calorific value of 50,000 kJ / m³ and is incinerated as a single product. The sorted light industrial organic solid waste is simple and stable in composition, with a 10% incineration ratio determined based on its calorific value and boiler load. In this state, the levels of gaseous pollutants such as HCl and SO₂ are low. Flue gas purification data feedback from the DCS at the chimney confirms that a 10% incineration ratio meets emission standards and requires no adjustment. The pyrolytic char obtained from the pyrolysis of the light industrial organic solid waste can be processed to produce activated carbon, which is then injected into the flue after the reaction tower to further absorb acidic gases, dioxins, and heavy metals from the incineration flue gas. The pyrolysis oil obtained from the pyrolysis of the light industrial organic solid waste can be further refined and separated for internal use.

[0057] Example 5.

[0058] Incoming industrial organic solid waste undergoes a primary crushing process, reducing its particle size to less than 200mm. It is then separated by wind power into heavy and light industrial organic solid waste. The heavy industrial organic solid waste has a calorific value of 25,000 kJ / kg, while the pyrolysis gas from the light industrial organic solid waste has a calorific value of 50,000 kJ / m³. These are co-combusted. The sorted light and heavy industrial organic solid wastes are simple and stable in composition. A 5% co-combustion ratio is determined based on their calorific values ​​and boiler load. In this state, the levels of gaseous pollutants such as HCl and SO₂ are low. Flue gas purification data provided by the DCS at the chimney confirms that this 5% co-combustion ratio meets emission standards and requires no adjustment. The pyrolysis char produced from the pyrolysis of the light industrial organic solid waste can be processed to produce activated carbon, which is then injected into the flue after the reaction tower to further absorb acidic gases, dioxins, and heavy metals from the incineration flue gas. The pyrolysis oil produced from the pyrolysis of the light industrial organic solid waste can be further refined and separated for internal use.

[0059] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A method based on refined co-combustion of multi-source industrial organic solid waste, characterized in that: include: The industrial organic solid waste is coarsely crushed and air-sorted to separate light industrial organic solid waste and heavy industrial organic solid waste; The heavy industrial organic solid waste enters the incinerator and is burned together with domestic garbage, and the burning ratio of the heavy industrial organic solid waste is determined based on the combustion data; Light industrial organic solid waste is pyrolyzed to produce pyrolysis char, pyrolysis oil and pyrolysis gas, which is then fed into an incinerator and burned with domestic waste. The proportion of the mixed combustion of light industrial organic solid waste is determined based on combustion data. The heavy industrial organic solid waste and pyrolysis gas can be mixed with domestic waste for combustion, or they can be mixed with domestic waste for combustion. The combustion data includes boiler load, calorific value of heavy industrial organic solid waste, calorific value of pyrolysis gas, and flue gas purification data; the flue gas purification data is obtained by adjusting the lime slurry opening of the purification reaction tower based on the sulfur dioxide and hydrogen chloride content in the flue gas; When the calorific value of the heavy industrial organic solid waste is between 15000kJ / kg and 25000kJ / kg, the single blending ratio is up to 40% under normal operation; when the calorific value of the pyrolysis gas is between 30000-50000kJ / m 3 To ensure normal operation, the maximum single blending ratio is 20%.

2. The method for finely blending and burning multi-source industrial organic solid waste according to claim 1, characterized in that: The pyrolysis gas is mixed with primary / secondary air and uniformly enters the incinerator to be burned with domestic waste.

3. The method for finely blending and burning multi-source industrial organic solid waste according to claim 1 is characterized in that: The heavy industrial organic solid waste is mixed evenly with domestic garbage and then enters the incinerator for combustion together with the domestic garbage.

4. The method for finely blending and burning multi-source industrial organic solid waste according to claim 1, characterized in that: The pyrolytic carbon obtained by pyrolysis of the light industrial organic solid waste can be sprayed into the flue after the purification reaction tower to adsorb acidic gases, dioxins and heavy metals.

5. The method for finely blending and burning multi-source industrial organic solid waste according to claim 1, characterized in that: When heavy industrial organic solid waste, pyrolysis gas and domestic garbage are co-combusted, the co-combustion ratio cannot be higher than the maximum ratio of single component co-combustion.

Images