Calcium-based columnar desulfurizing agent produced by utilizing specific manganese-series material as well as preparation method and application of calcium-based columnar desulfurizing agent

Abstract

The invention relates to the technical field of desulfurizing agents, and provides a calcium-based columnar desulfurizing agent produced by using a specific manganese-series material and a preparation method and application thereof.The calcium-based columnar desulfurizing agent is prepared from, by weight, 80% of calcium hydroxide 78-82 parts, 3% of manganese-series material 1-5 parts, 2% of adhesive 1-4 parts, 10% of sodium soil 7-12 parts and 5% of pore forming agent 2-8 parts. The granularity of the manganese material is 390-410 meshes, and the water content of the manganese material is lower than 1%. Under the condition of the same dosage and use environment, especially in a low-temperature environment of 70-150 DEG C, the calcium-based columnar desulfurizer produced by using the specific manganese-based material is qualitatively improved in time and desulfurization efficiency, the material is more fully utilized, the production cost is lower, and good economic benefits are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of desulfurizing agents, and more specifically, to a calcium-based columnar desulfurizing agent produced by using a specific manganese-based material, and a preparation method and application thereof. Background Art

[0002] Desulfurizer is an agent used to remove free sulfur or sulfur compounds from fuel, raw materials or other materials, as well as an agent that can remove sulfur oxides (including SO2 and SO3) from exhaust gas during pollutant control and treatment. It is an important environmentally friendly material that plays a key role in reducing air pollution and purifying industrial waste gas.

[0003] At present, the existing calcium-based desulfurizers are mainly used in dry desulfurization devices, and are divided into two types: fixed bed and moving bed. The material structure uses calcium hydroxide as the main material, supplemented by adhesives to increase strength, and is greatly affected by temperature in the actual reaction process. For example, in the steel industry, the general temperature range is between 70-150°C. Under this temperature condition, the reaction ability of calcium hydroxide and sulfide is poor, and it is affected by the change of sulfide, and the emission index of sulfide cannot be effectively controlled.

[0004] It can be seen that at temperatures above 200°C, calcium hydroxide has better activity and reacts faster with sulfides, while at temperatures below 200°C, calcium hydroxide has weaker activity and reacts with sulfides at a low rate in this temperature range, and cannot effectively deal with sulfide emission indicators;

[0005] In order to solve the above problems, the present application proposes a calcium-based columnar desulfurizer produced using specific manganese-based materials, and a preparation method and application thereof. Summary of the invention

[0006] The object of the present invention is to provide a calcium-based columnar desulfurizer produced by using a specific manganese-based material, and a preparation method and application thereof, which can improve the efficiency of removing sulfides by more than 30% under the same usage amount.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] A calcium-based columnar desulfurizer produced by using specific manganese-based materials. The calcium-based columnar desulfurizer includes the following raw materials in parts by weight: 78-82 parts of calcium hydroxide, accounting for 80%, 1-5 parts of manganese-based materials, accounting for 3%, 1-4 parts of adhesives, accounting for 2%, 7-12 parts of sodium clay, accounting for 10%, and 2-8 parts of pore-forming agents, accounting for 5%. The particle size of the manganese-based materials is 390-410 meshes, and the water content is less than 1%.

[0009] On the one hand, the present invention also provides a method for preparing a calcium-based columnar desulfurizer, and the specific preparation steps are as follows:

[0010] S1: grinding the manganese material into a 400-mesh powder by a ball mill, and then drying it to control the water content to less than 1%;

[0011] S2: Before mixing the materials, start the mixer and preheat it to above 45°C;

[0012] S3: 40g of calcium hydroxide, 1.5g of sodium soil, 1g of pore former, 5g of manganese material, and 2.5g of adhesive are added to a mixer in sequence and mixed;

[0013] S4: During the mixing of the raw materials, the mixer is controlled to run for 5 to 6 minutes when calcium hydroxide is added, and the dispersion of calcium hydroxide is observed, and then other materials are added in sequence, while ensuring that the temperature of the mixer does not exceed 60°C. After each material is added, the mixer is controlled to run for 3 to 5 minutes to maintain dispersion between the materials;

[0014] S5: The uniformly mixed powder material is pumped into a mixer through a mixer, soft water is added, and the material is mixed in the mixer for 30 to 34 minutes. The humidity is controlled at 30 to 35%, and the mixed material is fed into an extruder through a feed port;

[0015] S6: The extruded material enters the pre-drying kiln through the distributor, the temperature is controlled at 30-50℃, the time is 4-5 minutes, and the water vapor inside the material is taken away;

[0016] S7: The semi-finished product obtained by the pre-baking kiln enters the drying kiln, the drying temperature is controlled at 200-220°C, the drying time is 45 minutes, and finally the finished product is bagged.

[0017] On the other hand, the present invention also provides an application of a calcium-based columnar desulfurizer. Through the low-temperature activity of manganese-based materials, the calcium-based columnar desulfurizer can be applied to environments such as the steel industry below 200°C.

[0018] Beneficial effects of the present invention:

[0019] The present invention uses the low-temperature activity of specific manganese materials to achieve an oxidation capacity of more than 85% at 70-150°C. By adding specific manganese materials, the conversion of sulfur dioxide into sulfur trioxide is increased by more than 50%. The reaction rate of sulfur trioxide and calcium hydroxide is extremely high. When the specific manganese materials are added under low temperature conditions, the efficiency of removing sulfides from the calcium-based columnar desulfurizer is increased by more than 30% at the same usage amount.

[0020] Compared with the existing similar products, the product of the present invention can reduce the dosage by about 30% when removing the same amount of sulfide, and the production cost is not increased, so it has very good economic benefits. DETAILED DESCRIPTION

[0021] The present invention is described in detail below with reference to the examples. However, it should be understood that the following examples are only illustrative of the embodiments of the present invention, and are not intended to limit the scope of the present invention.

[0022] Example 1

[0023] This embodiment provides a calcium-based columnar desulfurizer produced by using a specific manganese-based material and a preparation method thereof, including the raw material components in the weight percentage content shown in the following Table 1;

[0024] The method for producing a calcium-based columnar desulfurizer using specific manganese-based materials is as follows:

[0025] Step 1: Grind the manganese material into 400 mesh powder by a ball mill, and then dry it to control the water content below 1%;

[0026] Step 2: Before mixing the materials, start the mixer and preheat it to above 45°C;

[0027] Step 3: Add calcium hydroxide, sodium soil, pore-forming agent, manganese-based material, and adhesive into a mixer in sequence for mixing;

[0028] Step 4: During the mixing of the raw materials, the mixer is controlled to run for 5 minutes when calcium hydroxide is added, and the dispersion degree of calcium hydroxide is observed, and then other materials are added in sequence, while ensuring that the temperature of the mixer is maintained at 55-60°C. After each material is added, the mixer is controlled to run for 4 minutes to maintain dispersion between the materials;

[0029] Step 5: The uniformly mixed powder material is pumped into a mixer through a mixer, soft water is added, and the material is mixed in the mixer for 30 minutes, and the humidity is controlled at 30%. The mixed material enters the extruder through the feed port;

[0030] Step 6: The extruded material enters the pre-drying kiln through the distributor, the temperature is controlled at 45℃, the time is 5 minutes, and the moisture inside the material is removed;

[0031] Step 7: The semi-finished product obtained from the pre-baking kiln enters the drying kiln, the drying temperature is controlled at 200°C, the drying time is 45 minutes, and finally the finished product is bagged;

[0032] Among them, the dosage and preparation method of the calcium-based columnar desulfurizer raw materials are the optimal required values ​​obtained from multiple experimental data.

[0033] Real-time Example 2

[0034] The existing calcium-based columnar desulfurizer and the calcium-based columnar desulfurizer produced using specific manganese materials provided in Example 1 were placed in an environment of 70-150°C at the same dosage and tested in combination with a moving bed desulfurization reactor in the steel industry. The specific results are shown in Table 1.

[0035]

[0036] Table 1

[0037] It can be understood that under the same dosage and usage environment, especially in a lower temperature environment of 70-150°C, the calcium-based columnar desulfurizer produced using specific manganese materials has a qualitative improvement in time and desulfurization efficiency, more effective material utilization, lower production costs, and good economic benefits.

[0038] The above description of the embodiments is to facilitate the understanding and application of the present application by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without having to pay creative labor. Therefore, the present application is not limited to the embodiments herein, and improvements and modifications made by those skilled in the art based on the contents disclosed in the present application without departing from the scope and spirit of the present application are within the scope of the present application.

Claims

1. A calcium-based columnar desulfurizer produced using a specific manganese-based material, characterized in that: The calcium-based columnar desulfurizer includes the following raw materials in parts by weight: 78-82 parts of calcium hydroxide, 1-5 parts of manganese-based materials, 1-4 parts of adhesives, 7-12 parts of sodium clay, and 2-8 parts of pore-forming agents.

2. The calcium-based columnar desulfurizer produced using a specific manganese-based material according to claim 1, characterized in that: The raw material mass ratio in the calcium-based columnar desulfurizer is 80% of calcium hydroxide, 3% of manganese-based material, 2% of adhesive, 10% of sodium clay, and 5% of pore-forming agent.

3. The calcium-based columnar desulfurizer produced by using a specific manganese-based material according to claim 1, characterized in that: The particle size of the manganese series material is 390-410 meshes, and the water content is less than 1%.

4. A method for preparing a calcium-based columnar desulfurizer, for preparing a calcium-based columnar desulfurizer produced by using a specific manganese-based material as claimed in any one of claims 1 to 3, characterized in that: The specific preparation steps are as follows: S1: grinding the manganese material into powder, and then drying it to remove excess water; S2: Before mixing the raw materials, run the mixer to preheat; S3: adding calcium hydroxide, sodium soil, pore former, manganese material and adhesive into a mixer in sequence for mixing; S4: During the mixing of the raw materials, calcium hydroxide is pre-dispersed in the mixer, the dispersion of calcium hydroxide is observed, and then other materials are added in sequence. The temperature of the mixer is not higher than 60°C, and the mixer is operated for 3 to 5 minutes at the interval of adding each material; S5: The mixed powder material is put into a mixer, and soft water is added and mixed for 30 to 34 minutes to control the humidity of the material. The mixed material enters the extruder through the feed port; S6: The extruded material is first sent to the pre-kiln for pre-treatment through the distributor to remove the moisture inside the material; S7: The semi-finished product obtained after pretreatment is put into a drying kiln, and the material is formed at a drying temperature of 200-220°C, and finally the finished product is bagged.

5. An application of a calcium-based columnar desulfurizer, using the calcium-based columnar desulfurizer produced using a specific manganese-based material as described in any one of claims 1 to 3, characterized in that: The low-temperature activity of manganese-based materials enables the calcium-based columnar desulfurizer to be used in environments below 200°C.

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