阅读说明：本技术 脱硫石膏废水的综合利用方法 (Comprehensive utilization method of desulfurized gypsum wastewater ) 是由 危鹏 于 2021-09-07 设计创作，主要内容包括：本发明涉及固废液废综合利用技术领域,尤其涉及脱硫石膏废水的综合利用方法。包括以下步骤：使用制浆搅拌器,加入脱硫石膏废水、粉煤灰,搅拌一定时间,测量浆料扩散度达到标准后,使用蒸汽将制浆温度加热到一定温度；将制备好的浆料打到浇注搅拌罐内,加入RGM混凝土增强剂浆料,再加入白灰、铝粉,搅拌均匀后,将浆料浇注到模箱内；将已经浇注浆料的模箱移动到静养间静止发气；经过静养发气结束后,坯体达到具备切割的软硬度后,使用切割机切割；将切割后的砌块坯体放入蒸压釜内,通过一定压力和温度的蒸汽蒸压后,就可制出蒸压加气混凝土砌块成品。本发明提供出一种固废液废利用、生产蒸压加气混凝土砌块的脱硫石膏废水的综合利用方法。(The invention relates to the technical field of comprehensive utilization of solid waste liquid and waste liquid, in particular to a comprehensive utilization method of desulfurized gypsum waste water. The method comprises the following steps: adding desulfurized gypsum wastewater and fly ash into a pulping stirrer, stirring for a certain time, measuring the diffusivity of the slurry to reach a standard, and heating the pulping temperature to a certain temperature by using steam; pouring the prepared slurry into a pouring stirring tank, adding RGM concrete reinforcing agent slurry, adding lime and aluminum powder, stirring uniformly, and pouring the slurry into a mold box; moving the mould box which is poured with the slurry to a static curing room for static gas generation; after the static curing is finished, cutting the blank by using a cutting machine after the blank reaches the cutting hardness; and (3) putting the cut building block blank into a still kettle, and steaming and pressing the building block blank by steam at a certain pressure and temperature to prepare a finished product of the autoclaved aerated concrete building block. The invention provides a comprehensive utilization method of desulfurized gypsum wastewater for utilizing solid waste liquid and producing autoclaved aerated concrete blocks.)

1. The comprehensive utilization method of the desulfurized gypsum wastewater is characterized by comprising the following steps: the method comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;

step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;

step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.

2. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.

3. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the volume of the mould box is 3.5 cubic.

4. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m³Within.

5. The comprehensive utilization method of desulfurized gypsum wastewater according to claim 1, characterized in that: the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.

6. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.

7. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

8. The method for comprehensively utilizing desulfurized gypsum wastewater according to claim 5, wherein: the red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.

Technical Field

The invention relates to the technical field of comprehensive utilization of solid waste liquid and waste liquid, in particular to a comprehensive utilization method of desulfurized gypsum waste water.

Background

The autoclaved aerated concrete block is a porous concrete product prepared by taking fly ash, lime, cement, gypsum, slag and the like as main raw materials, adding a proper amount of a gas former, a regulator and a bubble stabilizer, and carrying out the processes of batching, stirring, pouring, standing, cutting, high-pressure steam curing and the like. The traditional process technology mainly adopts fly ash, lime and cement as main raw materials, gypsum and aluminum powder as auxiliary raw materials, industrial water is added according to a certain proportion, after stirring and mixing, static curing gas generation and cutting steam pressing are carried out, the proportion of the industrial water used in the process is large, the average water consumption reaches 340 kg/cubic building block, and the water consumption cost is high.

Disclosure of Invention

The invention aims to provide a comprehensive utilization method of desulfurized gypsum wastewater for utilizing solid waste liquid and producing autoclaved aerated concrete blocks.

The technical scheme adopted by the invention is as follows: the comprehensive utilization method of the desulfurized gypsum wastewater comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;

step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;

step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.

The percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.

The volume of the mould box is 3.5 cubic.

The finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m³Within.

The RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.

The diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.

The gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

The red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.

The invention has the beneficial effects that:

the method uses the desulfurized gypsum wastewater to replace industrial water, is used for producing the autoclaved aerated concrete block, and has the advantages of low cost and high cost performance, and the strength of the finished product of the produced autoclaved aerated concrete block reaches the standard; the desulfurization gypsum wastewater generated in the production process of enterprises such as thermal power plants and titanium dioxide plants is utilized, so that the environmental protection problem of the development of the enterprises is solved, and the cost for treating the desulfurization gypsum wastewater by the enterprises is greatly saved.

Detailed Description

The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention.

The comprehensive utilization method of the desulfurized gypsum wastewater comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900-;

step two: and (3) casting: pumping the slurry prepared in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry with the weight of 280 plus materials, adding 350kg of lime with the weight of 280 plus materials into the pouring stirring tank, adding 2.2-2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box with the height of 4.8 m;

step three: the rest process: moving the mould box which is poured with the slurry in the step two to a resting room for static gas generation, wherein the temperature of the resting room is kept at 50 +/-5 ℃, and the time of the static gas generation is 80-90 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, and steaming and pressing for 5-6 hours by using steam with the pressure of 0.9-1.2MPa and the temperature of 175-.

The percentage of the desulfurized gypsum wastewater in the proportion is 35-45%, and the percentage of the fly ash in the proportion is 55-65%.

The volume of the mould box is 3.5 cubic.

The finished product of the autoclaved aerated concrete block has the kettle-discharging strength of more than 3.5MPa and the capacity of 625kg/m³Within.

The RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84-140kg, and the weight of the gypsum is 168-245 kg; the percentage of the red mud in the proportion is 30-40%, and the percentage of the gypsum in the proportion is 60-70%.

The diffusion degree of the RGM concrete reinforcing agent is 19-22 cm.

The gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

The red mud and the gypsum are fully and uniformly mixed after filtering particles with the diameter of more than 0.5cm to prepare the RGM concrete reinforcing agent.

Example 1:

the production process of the autoclaved aerated concrete block comprises the following steps:

the method comprises the following steps: pulping: adding 1050kg of desulfurized gypsum wastewater and 1400kg of fly ash into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 45 ℃ by using steam;

step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 310kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 310kg of lime into the pouring stirring tank, adding 2.5kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;

the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 108.5kg, the weight of the gypsum is 201.5kg, the percentage of the red mud in percentage by weight is 35%, and the percentage of the gypsum in percentage by weight is 65%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.

Example 2:

the production process of the autoclaved aerated concrete block comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900kg and fly ash with the weight of 1250kg into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 42 ℃ by using steam;

step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 280kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 280kg of lime into the pouring stirring tank, adding 2.2kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;

the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 84kg, the weight of the gypsum is 196kg, the percentage of the red mud in percentage by weight is 30%, and the percentage of the gypsum in percentage by weight is 70%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.

Example 3:

the production process of the autoclaved aerated concrete block comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 900kg and fly ash with the weight of 1250kg into a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 42 ℃ by using steam;

step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 280kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 280kg of lime into the pouring stirring tank, adding 2.2kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;

the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 112kg, the weight of the gypsum is 168kg, the percentage of the red mud in the proportion is 40%, and the percentage of the gypsum in the proportion is 60%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.

Example 4:

the production process of the autoclaved aerated concrete block comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 1200kg and fly ash with the weight of 1550kg by using a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 48 ℃ by using steam;

step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 350kg of lime into the pouring stirring tank, adding 2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;

the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 140kg, the weight of the gypsum is 210kg, the percentage of the red mud in the proportion is 40%, and the percentage of the gypsum in the proportion is 60%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.

Example 5:

the production process of the autoclaved aerated concrete block comprises the following steps:

the method comprises the following steps: pulping: adding desulfurized gypsum wastewater with the weight of 1200kg and fly ash with the weight of 1550kg by using a pulping stirrer, stirring for 30 minutes, measuring the diffusion degree of the slurry to be 19-22cm, and heating the pulping temperature to 48 ℃ by using steam;

step two: and (3) casting: pumping the prepared slurry in the step one into a pouring stirring tank by using a slurry pump, adding 350kg of RGM concrete reinforcing agent slurry (the diffusivity is 19-22cm), adding 350kg of lime into the pouring stirring tank, adding 2.7kg of aluminum powder, uniformly stirring, and pouring the slurry into a mold box (the volume is 3.5 cubic meters) with the height of 4.8 m;

the RGM concrete reinforcing agent is a mixture of red mud and gypsum, wherein the weight of the red mud is 105kg, the weight of the gypsum is 245kg, the percentage of the red mud in the proportion is 30%, and the percentage of the gypsum in the proportion is 70%; filtering out particles with the diameter of more than 0.5cm from the red mud and the gypsum, and then fully and uniformly mixing to prepare the RGM concrete reinforcing agent; the gypsum is one or more of white gypsum, desulfurized gypsum and red gypsum.

Step three: the rest process: moving the mould box which is poured with the slurry in the step two to a static curing room for static gas generation, wherein the temperature of the static curing room is kept at 50 ℃, and the static curing gas generation time is 85 minutes;

step four: cutting process: after the third step of static curing is finished, after the blank body reaches the cutting hardness, hoisting the die box and the blank body to a cutting machine by using a travelling crane, and cutting according to the specification and the size required by a customer;

step five: the steam pressing process comprises the following steps: and (4) grouping the cut building block blanks in the fourth step by using a travelling crane, putting the building block blanks into an autoclave, and autoclaving the blanks for 5.5 hours by using steam with the pressure of 1.1MPa and the temperature of 185 ℃ to obtain finished autoclaved aerated concrete building block products.

The cost data for the steam pressurized concrete block plant with a 2000 cubic per day output using the conventional process and the process described in example 1 is shown in the following table:

therefore, the autoclaved aerated concrete block produced by the invention uses the desulfurized gypsum wastewater to replace industrial water, the cost is saved by 0.85 yuan when 1 cubic autoclaved aerated concrete block is produced compared with the traditional process method, the cost of an autoclaved aerated concrete block factory with the daily output of 2000 cubic meters can be saved by 1700 yuan each day, and 60 ten thousand yuan can be saved each year; the method scientifically utilizes the desulfurized gypsum wastewater generated in the production process of enterprises such as thermal power plants, titanium dioxide plants and the like, not only solves the environmental protection problem faced by the development of the enterprises, but also saves great cost for the enterprises to treat the desulfurized gypsum wastewater, and the cost of the traditional method for treating the desulfurized gypsum wastewater by the enterprises at present is 40 yuan/cubic; the technical method is adopted in an autoclaved aerated concrete block factory with the daily output of 2000 cubes, and the comprehensive cost of upstream and downstream enterprises can be saved by 29000 Yuan/day when 1 cube of desulfurized gypsum wastewater is comprehensively utilized.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.