Preparation process for producing magnesium sulfate fertilizer by using waste after magnesium desulfurization
阅读说明：本技术 一种利用镁法脱硫后的废弃物生产硫酸镁肥的制备工艺 (Preparation process for producing magnesium sulfate fertilizer by using waste after magnesium desulfurization ) 是由 孙忠祥 于 2021-02-01 设计创作，主要内容包括：本发明涉及一种利用镁法脱硫后的废弃物生产硫酸镁肥的制备工艺,包括,步骤1,向搅拌罐内投放待反应的镁法脱硫后的废弃物,中控单元启动；步骤2,中控单元启动动力装置,通过传送装置传递至搅拌装置,带动搅拌装置进行搅拌；步骤3,中控单元根据检测到的数值调节进料质量及搅拌时间,直至出料管处的硫酸镁肥中水溶镁含量符合标准时排出；本发明设备生产的七水硫酸镁的纯度可以达到98％以上,水不溶物的质量分数小于0.5％；肥料粒度在2～4mm；PH值在5～9范围,该制备工艺流程短、制造成本低,节能环保,具有可观的经济效益,实现产出水溶镁含量符合标准的硫酸镁肥的目标。(The invention relates to a preparation process for producing a magnesium sulfate fertilizer by using waste subjected to magnesium desulfurization, which comprises the following steps of 1, putting the waste subjected to magnesium desulfurization to be reacted into a stirring tank, and starting a central control unit; step 2, the central control unit starts a power device, transmits the power device to the stirring device through the transmission device, and drives the stirring device to stir; step 3, the central control unit adjusts the feeding quality and the stirring time according to the detected numerical value until the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharge pipe meets the standard and discharges the water-soluble magnesium; the purity of the magnesium sulfate heptahydrate produced by the equipment can reach more than 98 percent, and the mass fraction of water-insoluble substances is less than 0.5 percent; the granularity of the fertilizer is 2-4 mm; the pH value is 5-9, the preparation process is short in flow, low in manufacturing cost, energy-saving and environment-friendly, has considerable economic benefits, and achieves the aim of producing the magnesium sulfate fertilizer with the water-soluble magnesium content meeting the standard.)
1. A preparation process for producing a magnesium sulfate fertilizer by using wastes desulfurized by a magnesium method comprises the following steps:
step 1, putting the waste to be reacted after magnesium desulfurization into a stirring tank, and starting a central control unit;
step 2, the central control unit starts a power device, and the power of the power device is transmitted to a stirring device through a transmission device to drive the stirring device to stir;
step 3, the central control unit adjusts the feeding quality of the feeding hopper and the stirring time of the stirring device according to the numerical value of the water-soluble magnesium content detected by the detection device until the water-soluble magnesium content in the magnesium sulfate fertilizer at the discharging pipe meets the standard and discharges the water-soluble magnesium;
the stirring tank is used for containing the waste to be reacted after the magnesium desulphurization;
the top plate is arranged at the top of the stirring tank;
the feed hopper is arranged on one side of the top plate and used for placing the waste to be reacted after magnesium desulfurization into the stirring tank;
the electromagnetic valve is arranged at the hopper opening of the feeding hopper and is used for adjusting the feeding flow of the feeding hopper;
the power device is arranged on one side, far away from the feed hopper, of the top plate, is connected with the conveying device and is used for providing power;
the conveying device is arranged at the center of the top plate, is connected with the stirring device and is used for conveying the power provided by the power device to the stirring device;
the stirring device is arranged in the stirring tank, is connected with the conveying device and is used for stirring the waste desulfurized by the magnesium method;
the discharge pipe is arranged at the center of the bottom of the stirring tank and used for discharging reactants out of the stirring tank;
the detection device is arranged in the stirring tank and is used for detecting the content of the water-soluble magnesium;
the central control unit is arranged outside the stirring tank and is in wireless connection with the detection device, the stirring device, the electromagnetic valve and the conveying device respectively, and the central control unit controls the feeding quality of the feeding hopper and the stirring time of the stirring device according to a numerical value detected by the detection device, so that the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharge port meets the standard after a preset time;
and the central control unit is internally provided with a water-soluble magnesium content matrix A, a stirring time matrix T and a feeding quantity matrix M, and when the preparation process for producing the magnesium sulfate fertilizer by using the waste desulfurized by the magnesium method is adopted, the central control unit adjusts the stirring time Ti of the stirring device and the feeding quality Mi of the feeding hopper according to the water-soluble magnesium content Ai detected by the detection device so as to adjust the water-soluble magnesium content Ai' to a preset standard.
2. The process for preparing the magnesium sulfate fertilizer by using the wastes desulfurized by the magnesium method as claimed in claim 1, wherein the central control unit is provided with a water-soluble magnesium content matrix A (A1, A2, A3), wherein A1 is a first preset water-soluble magnesium content, A2 is a second preset water-soluble magnesium content, and A3 is a third preset water-soluble magnesium content; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, and T2 is a second stirring time parameter;
when the detection device detects that the content of the water-soluble magnesium is Ai, the central control unit compares the Ai with the internal parameters of the A matrix;
when Ai is less than A1, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and adjusts and selects first stirring time T1 as a time parameter;
when Ai is more than or equal to A1 and less than or equal to A2, the central control unit judges that the content of the water-soluble magnesium reaches the standard, and the central control unit does not adjust the stirring time parameter according to the content of the water-soluble magnesium;
and when Ai is more than A2 and less than or equal to A3, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and selects and adjusts the first stirring time T2 as a time parameter.
3. The process for preparing the magnesium sulfate fertilizer by using the waste after magnesium desulfurization according to claim 2, wherein Tj is selected as a stirring time adjusting parameter by the central control unit, Ti is the stirring time obtained by the central control unit, i is 1,2, the central control unit adjusts the real-time stirring time from Ti to P, wherein a is the preset water-soluble magnesium content;
when Ai-a is more than or equal to 0, P is Ti x I1- (Ai-a)/a x Tj I;
when Ai-a < 0, P ═ TixI 1+ (a-Ai)/a × Tj |.
4. The process for preparing the magnesium sulfate fertilizer by using the waste after magnesium desulfurization, according to claim 2, wherein when the detection device detects that the content of water-soluble magnesium is Ai ', if Ai' is greater than A3, the central control unit determines that the deviation of the content of the water-soluble magnesium is serious, the central control unit presets the feeding amount of a feeding hopper to be m, and the central control unit adjusts the feeding quality to be Mi;
when Ai '-a is more than or equal to 0, Mi ═ mxi 1- (Ai' -a)/axDi |;
when Ai '-a is less than 0, Mi ═ mxi 1+ (a-Ai')/a × Di |;
and when the detection device detects that the real-time content of the water-soluble magnesium is Aii, the detection result is transmitted to the central control unit, the central control unit calculates the difference value between Aii and A3, and when Aii is larger than A3, the central control unit judges that the feeding quality needs to be adjusted until Aii is not more than A3.
5. The process for preparing the magnesium sulfate fertilizer by using the wastes desulfurized by the magnesium method as claimed in claim 1, wherein a power plant rotation rate matrix V (V1, V2, V3) is arranged in the central control unit, wherein V1 is a first power plant rotation rate, V2 is a second power plant rotation rate, V3 is a third power plant rotation rate, and the parameter values are sequentially increased; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, T2 is a second stirring time parameter, Ti' is the stirring time adjusted by the central control unit, and T is the stirring time adjusted by the central control unit;
t1 is less than or equal to Ti', and the central control unit selects the rotation speed V1 of the first power device as a rotation speed parameter;
t1 is more than Ti' and less than or equal to T2, and the central control unit selects the rotation speed V2 of the second power device as a rotation speed parameter;
ti' > T2, and the central control unit selects a third power plant rotation speed V3 as a rotation speed parameter.
6. The process for preparing the magnesium sulfate fertilizer by using the wastes desulfurized by the magnesium method according to claim 5, wherein the rotating speed of the power plant is Vj, j is 1,2, 3, Tj' is a stirring time adjusting parameter, w is a stirring time adjusting parameter preset by the central control unit, and v is a rotating speed of the power plant preset by the central control unit;
when Ti ' -t is more than or equal to 0, Tj ' ═ w x |1- (Ti ' -t)/t x Vj/v |;
when Ti ' -t < 0, Tj ' ═ w × |1+ (t-Ti ')/t × Vj/v |.
7. The process of claim 3, wherein a feed hopper feed mass matrix M (M1, M2, M3) is arranged in the central control unit, wherein M1 is a first feed mass, M2 is a second feed mass, M3 is a third feed mass, the central control unit is preset with a feed amount M, and for a feed flow matrix Q (Q1, Q2, Q3), Q1 is a first feed flow, Q2 is a second feed flow, Q3 is a third feed flow, and Mii is the feed mass adjusted by the central control unit;
if Mii is less than or equal to M1, the central control unit selects a first feeding flow rate Q1 as the feeding flow rate;
if M1 is more than Mii and less than or equal to M2, the central control unit selects a second feeding flow rate Q2 as the feeding flow rate;
if M2 is more than Mii and less than or equal to M3, the central control unit selects a third feeding flow rate Q3 as the feeding flow rate.
8. The process for preparing the magnesium sulfate fertilizer by using the wastes desulfurized by the magnesium method according to claim 4, wherein the feeding quality adjusting parameter Di is d, the feeding quality adjusting parameter preset by the central control unit is d, and the parameter is obtained by comparing the feeding quality obtained by the central control unit in real time with the preset feeding quality, wherein Mii is the feeding quality obtained by the central control unit in real time; qi is a feeding flow adjusting parameter adjusted by the central control unit, and m is feeding quality preset by the central control unit;
when Mii-m is more than or equal to 0, Di ═ d × |1- (Mii-m)/m × Qi |;
when Mii-m < 0, Di ═ d × |1+ (m-Mii)/m × Qi |.
9. The process according to claim 8, wherein the feed flow rate adjustment parameter Qi is obtained by comparing the power plant rotation rate obtained by the central control unit in real time with a preset power plant rotation rate, where Vi is the power plant rotation rate obtained by the central control unit in real time, v is the power plant rotation rate preset by the central control unit, and q is the feed flow rate adjustment parameter preset by the central control unit;
when V is more than or equal to V, Qi ═ qx |1+ (Vi-V) m/(Mii-m) V |;
when Vi < v, Qi × |1- (v-Vi) m/(Mii-m) v |.
10. The process for preparing the magnesium sulfate fertilizer by using the waste desulfurized by the magnesium method according to claim 1, wherein the detection device comprises: the edge of the adsorption device is connected with the inner side wall of the stirring tank and is used for adsorbing water-soluble magnesium;
the weight sensor is arranged below the adsorption device, attached to the adsorption device and used for weighing the content of the adsorbed water-soluble magnesium colloid and transmitting the content value of the water-soluble magnesium colloid to the central control unit;
the central control unit is internally preset with water-soluble magnesium standard content of Mg and water-soluble magnesium colloid content of preset standard Y, and the real-time water-soluble magnesium colloid content obtained by a plurality of weight sensors arranged from top to bottom is Y1, Y2, Y3-YnWhen the magnesium content is Mg ═ Mg × (Y1+ Y2+ Y3+. + Y ═ Yn) and/nY, n is the number of the detection devices.
Technical Field
The invention relates to the technical field of magnesium sulfate fertilizer preparation, in particular to a preparation process for producing a magnesium sulfate fertilizer by using wastes after magnesium desulfurization.
Background
Magnesium desulfurization is a desulfurization technology process, wastes such as magnesium sulfate and magnesium sulfite are generated in the operation process of the process, the treatment cost of the wastes is high, the process is complex, but the waste magnesium sulfate generated by magnesium desulfurization is one of important substances for agricultural fertilizers and soil improvement, and in the beginning of the twenty-first century, China has great breakthrough in the process of preparing the magnesium sulfate fertilizer by using the magnesium desulfurization wastes, and the recycling of the magnesium desulfurization wastes and the regeneration resources is realized.
However, in the prior art, the preparation process of the magnesium sulfate fertilizer by using the magnesium desulfurization waste adopts a preparation process of mixing and stirring materials, the preparation process has complex operation flow and poor stirring effect, so that the yield of the magnesium sulfate fertilizer is low, and the content of water-soluble magnesium in the magnesium sulfate, which is an important index, is unstable.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a preparation process for producing a magnesium sulfate fertilizer by using waste desulfurized by a magnesium method, and solves the problem of waste desulfurized by the automatic stirring magnesium method.
In order to achieve the purpose, the invention provides the following technical scheme:
a preparation process for producing a magnesium sulfate fertilizer by using wastes desulfurized by a magnesium method comprises the following steps:
step 1, putting the waste to be reacted after magnesium desulfurization into a stirring tank, and starting a central control unit;
step 2, the central control unit starts a power device, and the power of the power device is transmitted to a stirring device through a transmission device to drive the stirring device to stir;
step 3, the central control unit adjusts the feeding quality of the feeding hopper and the stirring time of the stirring device according to the numerical value detected by the detection device until the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharging pipe meets the standard and discharges the magnesium;
the stirring tank is used for containing the waste to be reacted after the magnesium desulphurization;
the top plate is arranged at the top of the stirring tank;
the feeding hopper is arranged on one side of the top plate and used for placing the waste to be reacted after the magnesium desulfurization into the stirring tank;
the electromagnetic valve is arranged at the hopper opening of the feeding hopper and is used for adjusting the feeding flow of the feeding hopper;
the power device is arranged on one side, far away from the feed hopper, of the top plate, is connected with the conveying device and is used for providing power;
the conveying device is arranged at the center of the top plate, is connected with the stirring device and is used for conveying the power provided by the power device to the stirring device;
the stirring device is arranged in the stirring tank, is connected with the conveying device and is used for stirring the waste desulfurized by the magnesium method;
the discharge pipe is arranged at the center of the bottom of the stirring tank and used for discharging reactants out of the stirring tank;
the detection device is arranged in the stirring tank and is used for detecting the content of the water-soluble magnesium;
the central control unit is arranged outside the stirring tank and is in wireless connection with the detection device, the stirring device, the electromagnetic valve and the conveying device respectively, and the central control unit controls the feeding quality of the feeding hopper and the stirring time of the stirring device according to a numerical value detected by the detection device, so that the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharge port meets the standard after a preset time;
and the central control unit is internally provided with a water-soluble magnesium content matrix A, a stirring time matrix T and a feeding quantity matrix M, and when the preparation process for producing the magnesium sulfate fertilizer by using the waste desulfurized by the magnesium method is adopted, the central control unit adjusts the stirring time Ti of the stirring device and the feeding quality Mi of the feeding hopper according to the water-soluble magnesium content Ai detected by the detection device so as to adjust the water-soluble magnesium content Ai' to a preset standard.
Further, the central control unit is provided with a water-soluble magnesium content matrix A (A1, A2, A3), wherein A1 is a first preset water-soluble magnesium content, A2 is a second preset water-soluble magnesium content, and A3 is a third preset water-soluble magnesium content; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, and T2 is a second stirring time parameter; when the detection device detects that the content of the water-soluble magnesium is Ai, the central control unit compares the Ai with the internal parameters of the A matrix;
when Ai is less than A1, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and adjusts and selects first stirring time T1 as a time parameter;
when Ai is more than or equal to A1 and less than or equal to A2, the central control unit judges that the content of the water-soluble magnesium reaches the standard, and the central control unit does not adjust the stirring time parameter according to the content of the water-soluble magnesium;
when Ai is more than A2 and less than or equal to A3, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and selects and adjusts the first stirring time T2 as a time parameter;
further, the central control unit selects Tj as a stirring time adjusting parameter, Ti is the stirring time obtained by the central control unit, i is 1,2, and adjusts the real-time stirring time from Ti to P, wherein a is a preset water-soluble magnesium content;
when Ai-a is more than or equal to 0, P is Ti x I1- (Ai-a)/a x Tj I;
when Ai-a < 0, P ═ TixI 1+ (a-Ai)/a × Tj |.
Further, when the detection device detects that the content of the water-soluble magnesium is Ai ', if Ai' is more than A3, the central control unit judges that the deviation of the content of the water-soluble magnesium is serious, the central control unit presets the feeding amount of the feeding hopper to be m, and the central control unit adjusts the feeding quality to be Mi;
when Ai '-a is more than or equal to 0, Mi ═ mxi 1- (Ai' -a)/axDi |;
when Ai '-a is less than 0, Mi ═ mxi 1+ (a-Ai')/a × Di |;
and when the detection device detects that the real-time content of the water-soluble magnesium is Aii, the detection result is transmitted to the central control unit, the central control unit calculates the difference value between Aii and A3, and when Aii is larger than A3, the central control unit judges that the feeding quality needs to be adjusted until Aii is not more than A3.
Further, a power device rotation rate matrix V (V1, V2, V3) is arranged in the central control unit, wherein V1 is a first power device rotation rate, V2 is a second power device rotation rate, V3 is a third power device rotation rate, and the parameter values are increased sequentially; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, T2 is a second stirring time parameter, Ti' is the stirring time adjusted by the central control unit, and T is the stirring time adjusted by the central control unit;
t1 is less than or equal to Ti', and the central control unit selects the rotation speed V1 of the first power device as a rotation speed parameter;
t1 is more than Ti' and less than or equal to T2, and the central control unit selects the rotation speed V2 of the second power device as a rotation speed parameter;
ti' > T2, the central control unit selects a third power device rotation speed V3 as a rotation speed parameter;
further, the power plant rotation speed is Vj, j is 1,2, 3, Tj' is a stirring time adjusting parameter, w is a stirring time adjusting parameter preset by the central control unit, and v is a power plant rotation speed preset by the central control unit;
when Ti ' -t is more than or equal to 0, Tj ' ═ w x |1- (Ti ' -t)/t x Vj/v |;
when Ti ' -t < 0, Tj ' ═ w × |1+ (t-Ti ')/t × Vj/v |.
Furthermore, a feed hopper feed mass matrix M (M1, M2, M3) is arranged in the central control unit, wherein M1 is a first feed mass, M2 is a second feed mass, M3 is a third feed mass, the central control unit presets a feed amount to be M, and for a feed flow matrix Q (Q1, Q2, Q3), Q1 is a first feed flow, Q2 is a second feed flow, Q3 is a third feed flow, Mii is the feed mass adjusted by the central control unit, and Di is a feed mass adjusting parameter;
if Mii is less than or equal to M1, the central control unit selects a first feeding flow rate Q1 as the feeding flow rate;
if M1 is more than Mii and less than or equal to M2, the central control unit selects a second feeding flow rate Q2 as the feeding flow rate;
if M2 is more than Mii and less than or equal to M3, the central control unit selects a third feeding flow rate Q3 as the feeding flow rate.
Further, the feeding quality adjusting parameter Di is obtained by comparing the feeding quality obtained by the central control unit in real time with a preset feeding quality, where Mii is the feeding quality obtained by the central control unit in real time, Qi is the feeding flow adjusting parameter adjusted by the central control unit, and m is the feeding quality preset by the central control unit;
when Mii-m is more than or equal to 0, Di ═ d × |1- (Mii-m)/m × Qi |;
when Mii-m < 0, Di ═ d × |1+ (m-Mii)/m × Qi |.
Further, the feeding flow rate adjusting parameter Qi is obtained by comparing the power plant rotation rate obtained by the central control unit in real time with a preset power plant rotation rate, where Vi is the power plant rotation rate obtained by the central control unit in real time, v is the power plant rotation rate preset by the central control unit, q is the feeding flow rate adjusting parameter preset by the central control unit, and Mii is the feeding quality obtained by the central control unit in real time;
when Vi is more than or equal to v, Qi is q x I1 + (Vi-v) m/(Mii-m) v I;
when Vi < v, Qi × |1- (v-Vi) m/(Mii-m) v |.
Further, the detection device comprises: the edge of the adsorption device is connected with the inner side wall of the stirring tank and is used for adsorbing water-soluble magnesium;
the weight sensor is arranged below the adsorption device, attached to the adsorption device and used for weighing the content of the adsorbed water-soluble magnesium colloid and transmitting the content value of the water-soluble magnesium colloid to the central control unit;
the central control unit is internally preset with water-soluble magnesium standard content of Mg and water-soluble magnesium colloid content of preset standard Y, and the real-time water-soluble magnesium colloid content obtained by a plurality of weight sensors arranged from top to bottom is Y1, Y2, Y3-YnWhen the magnesium content is Mg ═ Mg × (Y1+ Y2+ Y3+. + Y ═ Yn) and/nY, n is the number of the detection devices.
Compared with the prior art, the magnesium sulfate fertilizer stirring device has the advantages that the central control unit is arranged and is respectively in wireless connection with the detection device, the stirring device, the electromagnetic valve on the feeding hopper and the conveying device, and the central control unit controls the feeding quality of the feeding hopper and the stirring time of the stirring device according to the numerical value detected by the detection device, so that the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharging port meets the standard after the preset time. The final water-soluble magnesium content meets the preset standard by adjusting the content conditions of different water-soluble magnesium in different modes respectively.
Particularly, the stirring time of the stirring device is adjusted to different degrees by the central control unit according to three standards A1, A2 and A3 for clearly dividing the content of the water-soluble magnesium, and the stirring time is increased, reduced or kept unchanged according to the real-time content of the water-soluble magnesium detected by the detection device, so that the regulation and control are convenient.
In particular, the invention sets a specific stirring time adjusting parameter Tj, compares the real-time stirring time with the preset stirring time, and obtains different correction coefficients so as to enable the stirring time adjusting quantity to reach an optimal control node.
Particularly, the invention sets that when the content of the water-soluble magnesium seriously exceeds the standard, the feeding quality of the feeding hopper is adjusted to ensure that the content of the water-soluble magnesium reaches the preset standard, sets the feeding quality condition parameter Di, and obtains different correction coefficients by comparing the feeding quality obtained in real time with the standard adjusting parameter so as to ensure that the adjusting quantity reaches the optimal control node.
In particular, the invention presets specific quality adjusting parameters and feeding flow adjusting parameters, and obtains different quality adjusting parameters by comparing the feeding quality obtained by the central control unit in real time with the preset feeding quality, so that the quality adjusting quantity reaches an optimal control node.
Particularly, the invention sets three power device rotation speed standards V1, V2 and V3, and simultaneously presets two stirring device stirring time standards T1 and T2, the central control unit selects the corresponding power device rotation speed by comparing the real-time stirring time with the preset stirring time standard, and the stirring time can reach the set requirement as soon as possible by adjusting the power device rotation speed.
Particularly, three feeding hopper feeding quality standard values M1, M2 and M3 are preset, three feeding flow standard values Q1, Q2 and Q3 are preset simultaneously, and according to the acquisition of real-time feeding quality by the central control unit, the feeding quality standard values are compared with the feeding quality standard values, and the preset feeding flow is selected.
In particular, the invention presets specific quality adjusting parameters and feeding flow adjusting parameters, and obtains different quality adjusting parameters by comparing the feeding quality obtained by the central control unit in real time with the preset feeding quality, so that the quality adjusting quantity reaches an optimal control node.
In particular, the invention presets specific flow regulation parameters, and obtains different flow regulation parameters by comparing the real-time measurement of the central control unit on the rotation rate of the power device with the preset rotation rate, so that the regulated quantity reaches the optimal control node.
Particularly, the water-soluble magnesium content detection device is formed by arranging a plurality of adsorption devices and weight sensors with the quantity corresponding to the adsorption devices, the central control unit calculates the water-soluble magnesium content in real time according to weight data fed back by the detection devices and compares the water-soluble magnesium content with the preset water-soluble magnesium content, and then the stirring time of the stirring device, the rotation speed of the power device and the feeding flow of the electromagnetic valve of the feeding hopper are analyzed and adjusted, so that the water-soluble magnesium content of the magnesium sulfate fertilizer at the discharging port meets the standard.
Drawings
FIG. 1 is a schematic view of the overall structure of a process for producing magnesium sulfate fertilizer from waste desulfurized by a magnesium method according to an embodiment of the present invention;
FIG. 2 is a schematic top view of a conveyor according to an embodiment of the present invention;
FIG. 3 is a schematic top view of a stirring device according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic structural diagram of a preparation process for producing magnesium sulfate fertilizer by using waste desulfurized by a magnesium method according to an embodiment of the present invention, the apparatus of the embodiment includes: the stirring tank 1 is used for containing a reactant to be reacted; the top plate 22 is arranged at the top of the stirring tank; the feed hopper 3 is arranged on one side of the top plate and used for placing the waste to be reacted after the magnesium desulfurization into the stirring tank; the electromagnetic valve 21 is arranged at the hopper opening of the feeding hopper and is used for adjusting the feeding flow of the feeding hopper; the power device is arranged on one side, far away from the feed hopper, of the top plate, is connected with the conveying device and is used for providing power for the conveying device; the conveying device is arranged at the center of the top plate, is connected with the stirring device and is used for conveying the power provided by the power device to the stirring device; the stirring device is arranged in the stirring tank, is connected with the conveying device and is used for stirring reactants; the discharge pipe 17 is arranged at the center of the bottom of the stirring tank and used for discharging reactants out of the stirring tank; and the detection device is arranged in the stirring tank and is used for detecting the content of the water-soluble magnesium. And the central control unit is arranged outside the stirring tank, is respectively in wireless connection with the detection device, the stirring device, an electromagnetic valve on the feeding hopper and the conveying device, and controls the feeding quality of the feeding hopper and the stirring time of the stirring device according to the numerical value detected by the detection device so as to enable the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharge port to meet the standard after the preset time. It can be understood by those skilled in the art that the shape and material of the stirring tank in this embodiment are not limited, and the setting position and setting manner of the conveyer are not limited, as long as the operation control based on the central control unit in this embodiment can be satisfied, so as to achieve the technical effect of controlling the feeding quality of the feeding hopper and the stirring time of the stirring device, so that the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharge port meets the standard after the preset time. Moreover, the setting position and the mode of the discharging and feeding pipe are not limited, and the feeding amount can be adjusted in a controllable mode.
The implementation steps of the invention comprise step 1, putting the waste after the magnesium desulphurization to be reacted into a stirring tank, and starting a central control unit; step 2, the central control unit starts a power device, and the power of the power device is transmitted to a stirring device through a transmission device to drive the stirring device to stir; step 3, the central control unit adjusts the feeding quality of the feeding hopper and the stirring time of the stirring device according to the numerical value detected by the detection device until the content of water-soluble magnesium in the magnesium sulfate fertilizer at the discharging pipe meets the standard and discharges the magnesium;
specifically, a water-soluble magnesium content matrix A, a stirring time matrix T and a feeding quantity matrix M are arranged in the central control unit; when the preparation process for producing the magnesium sulfate fertilizer by using the waste desulfurized by the magnesium method is adopted, the central control unit adjusts the stirring time Ti of the stirring device and the feeding quality Mi of the feeding hopper according to the content Ai of the water-soluble magnesium detected by the detection device so as to adjust the content Ai' of the water-soluble magnesium to a preset standard.
Specifically, the central control unit is provided with a water-soluble magnesium content matrix A (A1, A2, A3), wherein A1 is a first preset water-soluble magnesium content, A2 is a second preset water-soluble magnesium content, and A3 is a third preset water-soluble magnesium content; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, and T2 is a second stirring time parameter;
when the detection device detects that the content of the water-soluble magnesium is Ai, the central control unit compares the Ai with the internal parameters of the A matrix;
when Ai is less than A1, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and adjusts and selects first stirring time T1 as a time parameter;
when Ai is more than or equal to A1 and less than or equal to A2, the central control unit judges that the content of the water-soluble magnesium reaches the standard, and the central control unit does not adjust the stirring time parameter according to the content of the water-soluble magnesium;
when Ai is more than A2 and less than or equal to A3, the central control unit judges that the content of the water-soluble magnesium does not reach the standard, and selects and adjusts the first stirring time T2 as a time parameter;
specifically, the stirring time of the stirring device is adjusted to different degrees by the central control unit according to three standards A1, A2 and A3 for clearly dividing the content of the water-soluble magnesium, and the stirring time is increased, reduced or maintained unchanged according to the real-time content of the water-soluble magnesium detected by the detection device, so that the regulation and control are convenient.
Specifically, the central control unit selects Tj as a stirring time adjusting parameter, Ti is the stirring time obtained by the central control unit, i is 1,2, and the central control unit adjusts the real-time stirring time from Ti to P, wherein a is the preset content of water-soluble magnesium;
when Ai-a is more than or equal to 0, P is Ti x I1- (Ai-a)/a x Tj I;
when Ai-a < 0, P ═ TixI 1+ (a-Ai)/a × Tj |.
Specifically, the invention sets a specific stirring time adjusting parameter Tj, and obtains different correction coefficients by comparing the real-time adjusting quantity with a standard adjusting parameter so as to enable the adjusting quantity to reach an optimal control node.
Specifically, when the detection device detects that the content of the water-soluble magnesium is Ai ', if Ai' is more than A3, the central control unit judges that the deviation of the content of the water-soluble magnesium is serious, the central control unit presets the feeding amount of a feeding hopper to be m, and the central control unit adjusts the feeding quality to Mi;
when Ai '-a is more than or equal to 0, Mi ═ mxi 1- (Ai' -a)/axDi |;
when Ai '-a is less than 0, Mi ═ mxi 1+ (a-Ai')/a × Di |;
and when the detection device detects that the real-time content of the water-soluble magnesium is Aii, the detection result is transmitted to the central control unit, the central control unit calculates the difference value between Aii and A3, and when Aii is larger than A3, the central control unit judges that the feeding quality needs to be adjusted until Aii is smaller than or equal to A3.
Specifically, the method sets that when the content of the water-soluble magnesium seriously exceeds the standard, the content of the water-soluble magnesium reaches the preset standard by adjusting the feeding quality of the feeding hopper, sets the feeding quality condition parameter Di, and obtains different correction coefficients by comparing the feeding quality obtained in real time with the standard adjusting parameter so as to enable the adjusting quantity to reach the optimal control node.
Specifically, a power device rotation rate matrix V (V1, V2, V3) is arranged in the central control unit, wherein V1 is a first power device rotation rate, V2 is a second power device rotation rate, V3 is a third power device rotation rate, and the parameter values are increased sequentially; the stirring time matrix T (T1, T2), wherein T1 is a first stirring time parameter, T2 is a second stirring time parameter, Ti' is the stirring time adjusted by the central control unit, and T is the stirring time adjusted by the central control unit;
t1 is less than or equal to Ti', and the central control unit selects the rotation speed V1 of the first power device as a rotation speed parameter;
t1 is more than Ti' and less than or equal to T2, and the central control unit selects the rotation speed V2 of the second power device as a rotation speed parameter;
ti' > T2, the central control unit selects a third power device rotation speed V3 as a rotation speed parameter;
specifically, three power device rotation speed standards V1, V2 and V3 are set, two stirring device stirring time standards T1 and T2 are preset, the central control unit selects the corresponding power device rotation speed by comparing the real-time stirring time with the preset stirring time standards, and the stirring time is enabled to reach the set requirement as soon as possible by adjusting the power device rotation speed.
Specifically, the power plant rotation speed is Vj, j is 1,2, 3, Tj' is a stirring time adjusting parameter, w is a stirring time adjusting parameter preset by the central control unit, and v is a power plant rotation speed preset by the central control unit;
when Ti ' -t is more than or equal to 0, Tj ' ═ w x |1- (Ti ' -t)/t x Vj/v |;
when Ti ' -t < 0, Tj ' ═ w × |1+ (t-Ti ')/t × Vj/v |.
Specifically, the invention sets a specific stirring time adjusting parameter Tj, and simultaneously compares the real-time stirring time with the preset stirring time to obtain different correction coefficients so as to enable the adjusting quantity to reach the optimal control node.
Specifically, a feed hopper feed mass matrix M (M1, M2, M3) is arranged in the central control unit, wherein M1 is a first feed mass, M2 is a second feed mass, M3 is a third feed mass, the central control unit presets a feed amount to be M, and for a feed flow matrix Q (Q1, Q2, Q3), Q1 is a first feed flow, Q2 is a second feed flow, Q3 is a third feed flow, Mii is the feed mass regulated by the central control unit, and Di is a feed mass regulation parameter;
if Mii is less than or equal to M1, the central control unit selects a first feeding flow rate Q1 as the feeding flow rate;
if M1 is more than Mii and less than or equal to M2, the central control unit selects a second feeding flow rate Q2 as the feeding flow rate;
if M2 is more than Mii and less than or equal to M3, the central control unit selects a third feeding flow rate Q3 as the feeding flow rate.
Specifically, three feeding hopper feeding quality standard values M1, M2 and M3 are preset, three feeding flow standard values Q1, Q2 and Q3 are preset at the same time, and according to the acquisition of real-time feeding quality by the central control unit, the feeding quality standard values are compared with the feeding quality standard values, and the preset feeding flow is selected.
Specifically, the feeding quality adjusting parameter Di is obtained by comparing the feeding quality obtained by the central control unit in real time with a preset feeding quality, wherein Mii is the feeding quality obtained by the central control unit in real time; qi is a feeding flow adjusting parameter adjusted by the central control unit, and m is feeding quality preset by the central control unit;
when Mii-m is more than or equal to 0, Di ═ d × |1- (Mii-m)/m × Qi |;
when Mii-m < 0, Di ═ d × |1+ (m-Mii)/m × Qi |.
Specifically, the method presets specific quality adjusting parameters and feeding flow adjusting parameters, and obtains different quality adjusting parameters by comparing feeding quality obtained by the central control unit in real time with the preset feeding quality so as to enable the adjusting quantity to reach an optimal control node.
Specifically, the feeding flow rate adjusting parameter Qi is obtained by comparing the power plant rotation rate obtained by the central control unit in real time with a preset power plant rotation rate, where Vi is the power plant rotation rate obtained by the central control unit in real time, v is the power plant rotation rate preset by the central control unit, q is the feeding flow rate adjusting parameter preset by the central control unit, and Mii is the feeding quality obtained by the central control unit in real time;
when Vi is more than or equal to v, Qi is q x I1 + (Vi-v) m/(Mii-m) v I;
when Vi < v, Qi × |1- (v-Vi) m/(Mii-m) v |.
Specifically, the invention presets a specific flow regulation parameter Qi, and compares the real-time measurement of the rotation rate of the power device by the central control unit with the preset rotation rate to obtain different flow regulation parameters so as to enable the regulation quantity to reach the optimal control node.
Specifically, the detection device comprises: the adsorption devices 19 are horizontally arranged along the direction of the stirring device and are of a grid structure, and the edges of the adsorption devices are connected with the inner side wall of the stirring tank and are used for adsorbing water-soluble magnesium; the weight sensor 20 is arranged below the adsorption device, is attached to the adsorption device, and is used for weighing the content of the adsorbed water soluble magnesium colloid and transmitting the content value of the water soluble magnesium colloid to the central control unit; the central control unit is internally preset with water-soluble magnesium standard content of Mg and water-soluble magnesium colloid content of preset standard Y, and the real-time water-soluble magnesium colloid content obtained by a plurality of weight sensors arranged from top to bottom is Y1, Y2, Y3-YnWhen the magnesium content is Mg ═ Mg × (Y1+ Y2+ Y3+. + Y ═ Yn) and/nY, n is the number of the detection devices.
The water-soluble magnesium content detection device is formed by arranging a plurality of adsorption devices and weight sensors with the quantity corresponding to the adsorption devices, the central control unit calculates the water-soluble magnesium content in real time according to weight data fed back by the detection devices and compares the water-soluble magnesium content with the preset water-soluble magnesium content, and then the stirring time of the stirring device, the rotation speed of the power device and the feeding flow of the electromagnetic valve of the feeding hopper are analyzed and adjusted, so that the water-soluble magnesium content of the magnesium sulfate fertilizer at the discharging port meets the standard. It can be understood by those skilled in the art that the detection device of the present invention is not limited to specific setting of the position, the number, the material and the type in the stirring tank, as long as the content of the water-soluble magnesium in the stirring tank can be detected in real time.
Specifically, the power plant includes: the driving motor 14 is connected with the conveying device and used for providing power; and the first vertical plate 16 is arranged on one side, far away from the discharge hopper 3, of the top plate and used for fixing the driving motor 14. Those skilled in the art can understand that, the type and material of the driving motor and the first vertical plate of the present embodiment, and the connection manner of the driving motor and the first vertical plate are not limited, as long as the driving device of the present embodiment can provide power to drive the transmission device to move.
Specifically, the transfer device includes: the gear seat 4 is arranged at the center of the top plate and is used for connecting a gear 5 and the stirring device; the gear 5 is arranged at the top of the gear seat 4, is connected with the gear seat and is used for driving the gear seat to move; the rack 6 is arranged above the gear, is connected with the top plate 22 and is used for driving the gear to move; the pull rod 7 is arranged on the rack and used for driving the rack to move; the transmission element is arranged at the upper end of the pull rod and is used for driving the pull rod to move; and the second vertical plate 15 is connected with the transmission element and used for fixing the transmission element. When the transmission element is set as the screw rod 12, one end of the screw rod is connected with the power device, and the other end of the screw rod is rotatably connected with the second vertical plate to realize transmission; the transmission element can set up to slide 13, and when transmission element was the slide, the slide welded respectively with first riser and second riser, the bottom and the roof fixed connection of first riser and second riser this moment. Those skilled in the art can understand that the material and type of the related components in the conveying device of the embodiment are not limited, and the position and arrangement mode of the conveying device are not limited as long as the requirement for realizing the power of the conveying driving device can be met.
Specifically, the stirring device includes: the stirring shaft 8 is connected with the conveying device and is used for installing an annular plate 9; the annular plate 9 is arranged on the stirring shaft and is used for installing stirring blades 10; the stirring blades are arranged on the annular plate and are used for stirring the waste desulfurized by the magnesium method; stirring bottom plate 11, set up in the (mixing) shaft bottom extends to the agitator tank bottom, stirring bottom plate with agitator tank lower extreme cambered surface agrees with mutually, and the skilled person in the art can understand that, each part material, shape, setting position and the mode of setting of the agitating unit of this embodiment do not restrict, as long as can satisfy will put into the function that the waste carries out the stirring after the magnesium desulfurization in the agitator tank. In this embodiment, the stirring bottom plate of (mixing) shaft bottom can set up to slabby or latticed, is used for the great or the higher magnesium method desulfurization discarded object of consistency of stirring dynamics when the stirring bottom plate is slabby, when the stirring bottom plate is latticed, can accelerate stirring magnesium method desulfurization discarded object, plays certain effect of sieving. Simultaneously, a plurality of annular plates are installed at equidistance on the (mixing) shaft among the agitating unit, can with stirring vane fixed connection or active link on every annular plate, when annular plate and stirring vane active link, be equipped with mounting groove 18 on the annular plate, stirring vane's one end extends to the inside of mounting groove, is connected with the annular plate through the locking bolt, does benefit to stirring vane's washing, maintenance and change.
Specifically, it can be understood by those skilled in the art that the connection manner between the conveying device and the stirring device in the present invention is not limited, as long as the stirring function of the conveying device driving the stirring device can be achieved. The inventor proposes in view of the above that can be fixed connection when gear seat bottom and agitating unit, also can be through setting up the pole hole at gear seat and roof, the upper end of (mixing) shaft is passed through the bearing and is rotated the setting with the inner wall in pole hole, and gear seat and agitating unit active link more are favorable to gear seat, roof and agitating unit's dismantlement.
Specifically, when the top plate is fixedly connected with the stirring tank, one side of the top plate is provided with a feed hopper; when roof and agitator tank swing joint, roof one side can not set up the feeder hopper, treats that the reactant can be followed roof and agitator tank activity and puts in, and the skilled person in the art can understand that the material of roof, feeder hopper of this embodiment, shape and setting mode do not do the restriction, as long as can realize throwing in the waste behind the magnesium desulfurization to the agitator tank.
Specifically, the agitator tank is provided with a maintenance door, and it can be understood by those skilled in the art that the installation position, material, and shape of the maintenance door of the present embodiment on the agitator tank are not limited as long as the function of facilitating the maintenance, replacement, or cleaning of the agitator device by the user can be achieved.
Particularly, agitator tank bottom both sides all are equipped with pneumatic cylinder 2, are convenient for adjust the agitator tank height, and the technical personnel in the field can understand that the mode of setting up, material, the shape of the pneumatic cylinder of this embodiment do not do the restriction, as long as can realize adjusting the agitator tank height, convenient to use person's service function can.
Specifically, the valve is installed to the lower extreme of discharging pipe, and those skilled in the art can understand that the setting mode, material, the shape of the discharge gate valve of this embodiment do not do the restriction, as long as can realize being convenient for control magnesium sulfate fertile output function.
Specifically, magnesium sulfate prepared by the method is crystallized, filtered and dried to obtain magnesium sulfate monohydrate and magnesium sulfate heptahydrate; magnesium sulfate monohydrate and magnesium sulfate heptahydrate are prepared into magnesium sulfate fertilizer or magnesium-containing compound fertilizer according to the national standard according to the fertilizer processing technology in the prior art. The purity of the produced magnesium sulfate heptahydrate can reach more than 98 percent, and the mass fraction of water-insoluble substances is less than 0.5 percent. (ii) a The granularity of the fertilizer is 2-4 mm; the PH value is 5-9; and the manufacturing process has short flow, low cost and considerable economic benefit.
Specifically, the magnesium sulfate fertilizer prepared by the invention can be used as a basic raw material of magnesium fertilizer, magnesium-containing compound fertilizer and magnesium-containing soil conditioner, and a person skilled in the art can understand that the application of the prepared magnesium sulfate fertilizer is not limited, but the application of the magnesium sulfate fertilizer produced by applying the invention is in the protection scope of the invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
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