An industrial waste salt treatment process

Abstract

The present invention relates to the technical field of waste salt treatment, and specifically relates to an industrial waste salt treatment process, which includes three steps. First, waste salt blocks are put into a solid waste liquid receiving hopper for preliminary impurity screening, and the screened solid-liquid mixture is put into a melting pool for high-temperature radiation heating. Secondly, when the salt solution enters the melting pool, by continuously raising the temperature in the melting pool, the salt solution becomes in a molten state at a high temperature, causing high-boiling solid impurities to precipitate. Finally, the salt solution after high temperature flows out to a flaker for solidification, and at the same time, the waste gas after pyrolysis and incineration circulates through a pipeline to a tail gas treatment system for purification and is finally discharged. By preliminarily screening the waste salt blocks for preliminary solid impurities in the solid waste liquid receiving hopper before the salt solution is subjected to high-temperature radiation heating treatment, the reaction time after being put into the melting pool is reduced, and the fuel energy loss required is reduced to a certain extent.

Description

Technical Field

[0001] The present invention relates to the technical field of waste salt treatment, and particularly to an industrial waste salt treatment process. Background Art

[0002] Industrial waste salt is a by-product produced in industrial production. However, in the existing industry, for economic cost considerations, this waste salt will still be subjected to a certain degree of secondary refining to extract usable industrial salt crystals contained therein.

[0003] In the prior art, the treatment of industrial waste salt is nothing more than high-temperature melting treatment of the waste salt. By allowing the molten product to undergo a certain oxidation reaction in an aerobic environment, the organic matter in the waste salt is removed through such a chemical method to obtain a salt solution with a higher purity. After cooling and crystallization, it can be put into industrial use again. However, this method of directly inputting the waste salt base material will greatly increase the duration of the high temperature of melting, increasing the cost of the enterprise. The reason is that there are a large number of condensates (i.e., insoluble large particle crystals) in the waste salt base material. If the solution is to be completely and fully melted, the reaction needs to be carried out at a high temperature for a long time, and it is difficult to decompose through burning and chemical reactions. However, at present, removing solid substances from the salt solution that has not yet crystallized has always been a difficulty in industrial waste salt treatment.

[0004] Therefore, an industrial waste salt treatment process is proposed to solve the above-mentioned problems. Summary of the Invention

[0005] Technical Problems to be Solved

[0006] In view of the above-mentioned disadvantages of the prior art, the present invention provides an industrial waste salt treatment process, which can effectively solve the problem that in the prior art, before the waste salt is melted, the insoluble impurities inside need to be heated at a high temperature for a long time to precipitate, resulting in an increased loss of fuel energy.

[0007] Technical Solutions

[0008] To achieve the above object, the present invention is realized through the following technical solutions:

[0009] The present invention provides an industrial waste salt treatment process, including the following steps:

[0010] Step 1: Put the waste salt blocks into the solid waste liquid receiving hopper for preliminary impurity screening, and put the screened solid-liquid mixture into the melting pool for high-temperature radiation heating;

[0011] Step 2: When the salt solution enters the melting pool, continuously raise the temperature in the melting pool. At a high temperature, the salt solution becomes molten, and the high-boiling solid impurities precipitate;

[0012] Step 3: The salt solution after high temperature flows out onto the flaker for solidification. Meanwhile, the waste gas after pyrolysis and incineration circulates through the pipeline to the tail gas treatment system for purification and is finally discharged.

[0013] Among them, the solid waste receiving hopper includes a cylinder body and a decomposition tower. At the upper end of the cylinder body, a feed tray for waste salt to enter is installed. On the tray surface of the feed tray, a plurality of blanking holes with diameters smaller than the waste salt particles are provided. Above the feed tray on the cylinder body, there is a crushing disk that can rotate around the axis direction of the feed tray, which is used to grind the waste salt between the feed tray and the crushing disk. The decomposition tower is in the shape of a frustum of a cone with a narrow upper part and a wide lower part. The ground waste salt falls from the blanking holes onto the outer end face of the decomposition tower. An outlet block is also arranged on the decomposition tower. The outlet block is filled with hot water and can intermittently pour on the ground waste salt, and the waste salt begins to melt and form a mixed solution.

[0014] Among them, a precipitation ring is also provided at the lower part of the decomposition tower. The precipitation ring is arranged at the lower end of the decomposition tower and includes two concentric and annular first chambers and second chambers. The first chamber is used to collect the waste salt solution flowing down from the outer end face of the decomposition tower and overflow the precipitated solution into the second chamber.

[0015] Further, the crushing disk includes a turntable and grinding pieces. The turntable is rotatably installed on the cylinder body and is concentric and coaxial with the feed tray. The grinding pieces are installed on the turntable, and the distance between the grinding pieces and the feed tray gradually increases from one side of the turntable's rotation direction. Among them, several groups of cutting pieces are circumferentially distributed on the upper end face of the feed tray. Each group of cutting pieces is composed of several arc-shaped strips arranged radially along the feed tray.

[0016] Further, the feed tray is integrally in the shape of a bowl with an upward opening. There are a plurality of blanking holes, which are arranged in a staggered manner along the circumferential direction of the bottom of the feed tray.

[0017] Further, the precipitation ring includes a partition board. The partition board is concentric and coaxial with the cylinder body and is arranged at the bottom end of the decomposition tower. It forms a first chamber with the decomposition tower and a second chamber with the inner wall of the cylinder body. Among them, a reaction hopper is installed at the bottom end of the cylinder body. The reaction hopper is used to collect the solution overflowing from the precipitation ring, and a heating source is installed inside it to heat the solution at a high temperature and generate water vapor.

[0018] Further, the outlet block is a water-absorbing sponge. One side of it penetrates the end wall of the decomposition tower and extends into the decomposition tower to adsorb the water vapor generated from the reaction hopper. Among them, an extrusion block is also arranged on the turntable. The extrusion block is arranged on one side of the outlet block and squeezes out the water in the outlet block as the turntable rotates.

[0019] Further, a liquid collecting tank is also included in the decomposition tower. The liquid collecting tank is installed on the upper inner wall of the decomposition tower and is used for collecting the condensed water in the decomposition tower. One end of each water outlet block is located in the liquid collecting tank. Among them, a disc plate is further installed at the lower end of the turntable. The disc plate is integrally in the shape of an inverted disc body, and its outer edge extends towards the inside of the liquid collecting tank.

[0020] Further, a liquid outlet hole is opened at the bottom end of the second chamber. The liquid outlet hole communicates with the reaction hopper. Among them, a static chamber is also provided between the precipitation ring and the reaction hopper. A liquid passing column is provided in the middle of the static chamber. A through groove communicating with the static chamber and the reaction hopper respectively is opened in the middle of the liquid passing column.

[0021] Further, the cylinder body also includes a rotating ring. The rotating ring is rotatably installed at the top of the decomposition tower. A plurality of extrusion blocks are provided and installed on the rotating ring. The plurality of extrusion blocks are respectively arranged on one side of each water outlet block. Among them, a concave hole is opened at the upper end of the rotating ring. A convex protrusion is movably installed at the lower end of the turntable. The convex protrusion can be inserted into the concave hole to drive the rotating ring to rotate.

[0022] Further, the convex protrusion can elastically lift and lower along the axial direction of the turntable. Among them, a circular top cover is provided at the upper end of the cylinder body. A pressing strip that can move radially along the top cover is provided at the lower end of the top cover. The lower end of the pressing strip is arranged directly above the convex protrusion and one end thereof facing the convex protrusion is beveled. A resisting piece is provided at the outer end of the turntable. The moving path of the resisting piece intersects with one side of the pressing strip and can push the pressing strip towards the direction where the convex protrusion is located, so that the convex protrusion moves downward and is stuck in the concave hole.

[0023] Further, at least one resisting piece is provided and is detachably connected to the turntable.

[0024] Beneficial Effects

[0025] The technical solution provided by the present invention has the following beneficial effects compared with the known public technologies:

[0026] Before the salt solution is subjected to high-temperature radiation heating treatment, the present invention crushes large particles of waste salt by using grinding fragments, granulates some large-particle substances inside, and then adds hot water to these granulated waste salts. The small-particle waste salts quickly melt in water to form a highly viscous salt solution. The obtained product is precipitated in the precipitation ring to separate insoluble solid impurities in the salt solution, effectively reducing the proportion of insoluble impurities in the waste salt, reducing the required energy consumption, and reducing the enterprise cost. Description of the Drawings

[0027] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0028] Figure 1 Schematic diagram of the waste salt treatment process in the embodiment of the present invention;

[0029] Figure 2 Schematic diagram of the decomposed state of the main structure in the embodiment of the present invention

[0030] Figure 3 Schematic diagram of the overall structure in the embodiment of the present invention;

[0031] Figure 4 Schematic diagram of the ground-up fragment decomposition structure in the embodiment of the present invention;

[0032] Figure 5 Schematic diagram of the bottom cover looking up structure in the embodiment of the present invention;

[0033] Figure 6 Schematic diagram of the partial side view cross-section of the main structure in the embodiment of the present invention;

[0034] Figure 7 Schematic diagram of the side view cross-section of the internal structure of the cylinder in the embodiment of the present invention;

[0035] Figure 8 In the embodiment of the present invention Figure 6 Schematic diagram of the structure at location A;

[0036] Figure 9 Schematic diagram of the decomposition tower structure in the embodiment of the present invention;

[0037] Figure 10 Schematic diagram of the extrusion block structure in the embodiment of the present invention;

[0038] Figure 11 Schematic diagram of the top cover in the top-down state in the embodiment of the present invention;

[0039] Figure 12 In the embodiment of the present invention Figure 10 Schematic diagram of the structure at location B;

[0040] Figure 13 Schematic diagram of the turntable looking up structure in the embodiment of the present invention;

[0041] Figure 14 In the embodiment of the present invention Figure 12 Schematic diagram of the structure at location C;

[0042] Figure 15 Schematic diagram of the movement state of the protrusion in the embodiment of the present invention;

[0043] Figure 16 Schematic diagram of the structure of the cylinder body and the waste salt melting furnace in the embodiment of the present invention;

[0044] Figure 17 Schematic diagram of waste salt solution treatment in the embodiment of the present invention.

[0045] The reference numerals in the figure respectively represent: 1, cylinder body; 11, feeding tray; 111, blanking hole; 112, crushing tray; 1121, turntable; 1122, grinding fragments; 1123, extrusion block; 1124, swing plate; 1125, protrusion; 1126, spring; 1127, abutting piece; 113, arc-shaped strip; 13, reaction hopper; 14, rotating ring; 141, concave hole; 15, top cover; 151, pressing strip; 152, return spring; 153, extrusion groove; 154, sliding rod; 16, melting pool; 161, screw feeder; 162, oxygen bubbling device; 17, flaker; 18, oxidation chamber; 19, tail gas treatment system; 2, decomposition tower; 21, precipitation ring; 211, first chamber; 2111, filtering hopper; 212, second chamber; 2121, liquid outlet hole; 213, partition board; 22, liquid collecting tank; 23, static chamber; 231, liquid passing column; 3, water outlet block. Detailed implementation manners

[0046] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0047] The present invention will be further described below with reference to embodiments.

[0048] Embodiment:

[0049] Currently, a large amount of by-product salt is generated in industrial production processes. Most of the by-product salt is dissolved in industrial water. Since the salt-containing water has passed through many process links, some organic substances and some impurities are mixed in. The by-product salt obtained by evaporation and crystallization is an industrial waste salt containing salt, water and a small amount of other impurities, and cannot be directly used as the raw material for downstream products.

[0050] By - product industrial salt is the main industrial raw material in chemical production and a recyclable resource. Currently, the main treatment method is to subject the by - product industrial salt to high - temperature treatment to make the waste salt in a molten state. The waste salt is burned to turn water and some organic substances into gas. Through reaction with oxygen, after the organic substances come into contact with oxygen, they go through pyrolysis and incineration and turn into some substances such as nitrogen oxides. The flue gas enters the tail - gas treatment system for treatment and then is discharged up to standard. The remaining salt solution crystallizes into high - purity industrial salt. However, there are still some substances with relatively large specific gravity in the waste salt (large - particle crystals formed by nitrides, inorganic substances, and some chlorides. It takes a long time to completely reach the molten state, and the energy consumption for melting is greater than the recovery value), which are difficult to be decomposed by burning and chemical reactions. After the salt solution crystallizes, additional removal is required. However, removing solid substances from the uncrystallized salt solution under high - temperature conditions has always been a difficult point in waste - salt treatment.

[0051] Combined with the previous structural design of our company, two independent areas are set at the bottom of the melting furnace. The waste - salt solution under high - temperature conditions will start to melt, and solid impurities will settle in this high - temperature state and sink separately into one of the areas, while the other area is used to separate the molten salt from the impurities, achieving the purpose of removing solid impurities (patent application number 201920235359.5, an industrial waste - salt melting treatment device). After many experiments by our company, this method of removing solid impurities has the following deficiencies. When there are many large - particle impurities in the salt solution, it takes a long time to give high temperature to completely melt the large - particle block - shaped impurity salt blocks, with high energy consumption. Moreover, the salt solution itself is relatively viscous. When the solid - impurity particles are small and fine, it is difficult to precipitate from the salt solution, and the efficiency is low.

[0052] For this reason, combined with the attached Figure 1-17 , the present invention provides an industrial waste - salt treatment process, including the following steps:

[0053] First, put the waste - salt blocks into the solid - liquid waste receiving hopper (cylinder 1) for preliminary impurity screening, and put the screened solid - liquid mixture into the melting pool 16 for high - temperature radiation heating;

[0054] Secondly, when the salt solution in the solid - liquid mixed state enters the melting pool 16 batch by batch through the screw feeder 161, by continuously raising the temperature in the melting pool 16, the salt solution becomes molten under high - temperature conditions, and high - boiling - point solid impurities precipitate;

[0055] Finally, the salt solution after high - temperature flows out to the flaker 17 for solidification. At the same time, the waste gas after pyrolysis and incineration flows through the pipeline to the tail - gas treatment system 19 for purification and is finally discharged.

[0056] Compared with the prior art, the traditional method of directly putting waste salt blocks into the melting pool 16 is abandoned. Before putting them in, preliminary impurity screening is carried out to reduce the reaction time in the melting pool, effectively reducing the fuel input consumption. At the same time, it also avoids the situation that impurities will also be melted at high temperatures and mixed into the salt solution and are difficult to precipitate out.

[0057] Refer to Figure 1 , an oxidation chamber 18 is connected above the melting pool. The oxidation chamber 18 provides heat to the melting pool 16 through a pure oxygen burner. Under high-temperature conditions, the solid-liquid mixture put into the melting pool 16 will quickly become molten, and further solid impurity screening is carried out (the screening principle of solid impurities during melting is prior art and will not be elaborated here).

[0058] To improve the screening efficiency of the melting pool 16 for the salt solution, an oxygen bubbling device 162 is also provided at the bottom of the melting pool 16 to accelerate the surging effect of the salt solution, make the melt convection faster, make the organic matter in the waste salt burn more thoroughly, improve the purity of the salt and shorten the melting time. At this time, impurities with a larger specific gravity will be isolated at the bottom of the melting pool 16, and the purity of the molten salt liquid will be further improved and flow out from one side of the melting pool 16.

[0059] The flowing molten salt liquid will flow onto the flaker 17 for the transformation from liquid to solid. By blowing cold air, the solution is quickly crystallized to obtain high-purity salt frost. The waste gas generated by the combustion of organic matter in the melting pool 16 will be purified through the tail gas treatment system 19 and then discharged (the tail gas treatment system 19 treats some waste gases such as nitrogen oxides, water, and chlorides, and the treatment means are well-known technologies and will not be elaborated in this example).

[0060] In summary, this process undergoes the mutual transformation of solid phase → liquid phase and solid phase → liquid phase (molten state) → gas phase, and finally obtains high-purity salt crystals.

[0061] The purpose of the structure set in the solid waste receiving hopper in this solution is to crush the industrial waste salt before the salt solution is heated by high-temperature radiation, granulate some large-particle substances with a large specific gravity inside, and the small-particle waste salt will quickly melt when encountering water to form a highly viscous salt solution. At the same time, the insoluble solid impurities in the salt solution are separated, so that the material entering the melting pool 16 is already a salt solution after removing a certain amount of impurities. Through radiation high temperature and oxidation treatment (that is, entering the melting pool 16 in this example for reaction), a solution of industrial salt with high purity and few impurities in a molten state is obtained. After cooling, high-purity crystals are obtained, which not only reduces the time required for solid settlement and impurity melting, greatly reduces the working time of the melting pool 16, reduces energy consumption, but also reduces the number of impurity cleaning times in the melting pool 16, and effectively improves the production and processing efficiency of the enterprise.

[0062] Specifically in this case, first of all, the whole device includes two parts, namely the cylinder body 1 and the decomposition tower 2. A circular top cover 15 is installed at the upper end of the cylinder body 1. A plurality of openings for pouring waste salt base materials are provided on the end face of the top cover 15. Inside the cylinder body 1, starting from below the top cover 15, there are successively arranged a feeding tray 11 for grinding large particles of waste salt, a decomposition tower 2 for adding hot water to the ground waste salt to melt the waste salt, a static chamber 23 for precipitating the solution separated from the decomposition tower 2, and a reaction hopper 13 for heating the precipitated solution. A certain heating source is arranged inside the reaction hopper 13 to heat the solution at a high temperature and generate water vapor. The selection of the heating source in this example is not specifically limited. Since this device is used in cooperation with the molten pool 16, the waste heat of the molten pool 16 can be utilized or a heating source between 100 - 200 degrees Celsius can be provided, as long as the solution can generate water vapor and the melting speed can be accelerated, and the solid insoluble impurities can be removed.

[0063] When the waste salt enters the feeding tray 11 from the top cover 15, the crushing disc 112 arranged above the feeding tray 11 will start to rotate, squeezing and crushing the large - particle - size waste salt falling between the feeding tray 11 and the crushing disc 112 until it can meet the requirement of falling through the feeding hole 111 provided on the feeding tray 11. At this time, the volume of the waste salt is greatly reduced. In the actual process, the temperature of the whole device is relatively high, and the hardness of the waste salt will be greatly reduced in this high - temperature and relatively humid environment. After being rubbed by external force, it will be easily broken. When the smaller - volume waste salt particles fall onto the outer end face of the frustum - shaped decomposition tower 2 from the feeding hole 111, they will stay for a certain period of time (in a humid environment, the surface of the salt will have a certain viscosity, and the slope of the decomposition tower 2 is not enough to make all the salt particles roll down, and in this solution, the volume of the crushed salt particles is small, so most of them will adhere to the outer side of the decomposition tower 2 for a certain period of time). At this time, a certain amount of hot water begins to precipitate on the outer wall of the decomposition tower 2. When the hot water passes through the area where the salt particles adhere, it will start to melt the salt particles and flow downward along the slope of the decomposition tower 2.

[0064] At this time, most of the salt in the solution is dissolved in the solution. In addition, there are still a certain amount of insoluble waste impurities. The solution flowing down from the decomposition tower 2 will enter the precipitation ring 21 at the bottom of the decomposition tower 2 for precipitation immediately. The precipitation ring 21 is divided into two concentric - arranged annular chambers, namely the first chamber 211 and the second chamber 212. The solution will first enter the first chamber 211, and the insoluble impurities will gradually sink (the newly added insoluble impurities with a density greater than that of the solution will sink quickly). The purity of the solution at the upper part is relatively high. A filter hopper 2111 is also arranged at the lower end of the first chamber 211. When the liquid level of the solution stored inside is higher than that of the second chamber 212, it will overflow into the second chamber 212.

[0065] The solution that enters the second chamber 212 will flow into the static chamber 23. A liquid passing column 231 with a certain height is arranged in the middle of the static chamber 23. A through groove communicating with the static chamber 23 and the reaction hopper 13 is opened in the middle of the liquid passing column 231, further performing a certain precipitation treatment on the solution. The solution flowing into the reaction hopper 13 is more efficient and can improve the product quality compared to directly melting the waste salt.

[0066] Specifically, in this solution, the feeding tray 11 is integrally in the shape of a bowl with an upward opening, and its side end is in an arc shape, so that the salt grains will not be arched to the side and are difficult to push. A plurality of blanking holes 111 are provided on the surface of the feeding tray 11 and are arranged in a staggered manner along the circumferential direction of the bottom of the feeding tray 11. That is, the plurality of blanking holes 111 are arranged in a circumferential pattern as a whole, but in the circumferential direction, the front and rear holes are arranged in a staggered manner, so that the ground salt grains will always fall downward through the holes at a certain stage during the transmission process. The diameter of the blanking holes 111 is smaller than the waste salt particles. At the same time, the crushing disk 112 located directly above the feeding tray 11 can rotate around the axis of the feeding tray 11. The crushing disk 112 is divided into two parts, namely, a rotatable turntable 1121 and grinding pieces 1122 installed on the turntable 1121. The turntable 1121 is concentric and coaxial with the feeding tray 11. The distance between the grinding pieces 1122 and the feeding tray 11 gradually increases from one side of the rotation direction of the turntable 1121. That is, the whole grinding piece 1122 is in an arc shape, and the end facing the feeding tray 11 is in an arc shape. And the end face of the grinding piece 1122 on the side of the rotation direction of the turntable 1121 is in an inclined plane. Thus, during the rotation of the turntable 1121, there is an effect of gathering the salt grains (in this example, the turntable 1121 Figure 1 adopts a driving mechanism as shown in the appendix, and uses a motor and a connecting belt to drive the turntable 1121 to rotate, which is common knowledge and will not be specifically limited here).

[0067] Moreover, several groups of cutting blades are installed on the surface of the feeding tray 11. Each group of cutting blades is composed of four arc-shaped strips 113 arranged radially along the feeding tray 11. When the salt grains move on the feeding tray 11 due to the rotation of the turntable 1121, they will contact the cutting blades, and the cutting blades will break the passing salt grains. The salt grains that can pass through the blanking holes 111 meet the particle size requirements of the salt grains to be melted. Considering the processing environment inside this equipment, which is wet and has a certain temperature (the ambient temperature is between 50° and 100°), the melting speed of the salt grains will be relatively fast. Under the comprehensive environment of friction and melting, the melting speed of the salt grains is accelerated.

[0068] The decomposition tower 2 is generally in the shape of a frustum of a cone with a narrow upper part and a wide lower part. The ground waste salt falls from the feeding hole 111 onto the outer end face of the decomposition tower 2 (the overall area where the salt grains fall is annular). An outlet block 3 for intermittently discharging hot water is provided on the decomposition tower 2. The outlet block 3 is located above the salt grain distribution area (in this example, the discharging speed of the hot water is less than the cumulative quantity of the increased salt grains. In practice, it takes about one full rotation of the turntable 1121 to supplement a certain amount of water, and the water quantity is small, giving the salt grains sufficient melting time). At this time, the waste salt begins to melt and form a mixed solution.

[0069] The precipitation ring 21 installed at the lower part of the decomposition tower 2 serves to collect such a mixed solution, and at the same time, it provides a relatively independent area for the solution to precipitate, removing impurities with a relatively large weight. When the liquid level height of the solution above the precipitation area is higher than a certain level, it will start to overflow. The proportion of solid insoluble substances in the overflowing solution is greatly reduced. After multiple tests by our company, the time and energy consumed for the solution to reach the completely molten state at this time are much lower than those required for the initial state of solid large particles and caked waste salt to undergo the melting operation (the time is saved by about 70%).

[0070] In this example, the precipitation ring 21 is provided at the lower end of the decomposition tower 2, which includes two independent first chambers 211 and second chambers 212. The first chamber 211 is used to collect the waste salt solution flowing down from the outer end face of the decomposition tower 2 and overflow the precipitated solution into the second chamber 212. A liquid outlet hole 2121 is opened at the bottom end of the second chamber 212, and the liquid outlet hole 2121 communicates with the reaction hopper 13. A static chamber 23 is provided between the precipitation ring 21 and the reaction hopper 13. A liquid passing column 231 is provided in the middle of the static chamber 23. A through groove communicating with the static chamber 23 and the reaction hopper 13 is opened in the middle of the liquid passing column 231. By the combined use of the liquid passing column 231 and the two chambers, the precipitation time and effect are prolonged.

[0071] The crushing disc 112 includes an annular partition plate 213. The partition plate 213 is concentric and coaxial with the cylinder body 1 and the decomposition tower 2 and is provided at the bottom end of the decomposition tower 2. A first chamber 211 is formed between it and the decomposition tower 2, and a second chamber 212 is formed with the inner wall of the cylinder body 1. The inclined surface of the decomposition tower 2 faces the inside of the first chamber 211, and the melted mixed solution will enter the first chamber 211 in the first time.

[0072] In this solution, the water outlet block 3 provided on the decomposition tower 2 is made of absorbent sponge. One end of the water outlet block 3 facing the inside of the decomposition tower 2 penetrates the end wall of the decomposition tower 2 and extends into the decomposition tower 2 to adsorb the water vapor generated in the reaction hopper 13. In order to improve the collection speed inside the decomposition tower 2, a liquid collection tank 22 is additionally provided. The liquid collection tank 22 is installed on the upper inner wall of the decomposition tower 2 to collect the condensed water in the decomposition tower 2. When the water vapor rises and encounters the top wall of the decomposition tower 2, it will start to condense. The top end inside the decomposition tower 2 is set as a circular surface, and the liquid collection tank 22 in this example will timely collect the water droplets rolling down from this side. One end of each water outlet block 3 is located in the liquid collection tank 22 to absorb the internal moisture. During actual use, the water outlet block 3 can be appropriately wetted in advance. Since the water output and the water output frequency requirements are not high, the absorption of water vapor can fully meet the consumption rate of moisture.

[0073] At the same time, a disc plate 1124 is also installed at the lower end of the turntable 1121. The disc plate 1124 is integrally in the shape of an inverted disc body, and its outer edge extends into the liquid collection tank 22. When the turntable 1121 rotates, the water droplets condensed on the disc plate 1124 can be thrown into the liquid collection tank 22 under the action of centrifugal force, improving the collection efficiency.

[0074] The extrusion block 1123 provided on the turntable 1121 is used in cooperation with the water outlet block 3 in this example. The extrusion block 1123 is arranged on one side of the water outlet block 3 and extrudes the moisture in the water outlet block 3 as it rotates with the turntable 1121.

[0075] Specifically, a rotating groove is opened on the upper surface of the decomposition tower 2, and a rotatable rotating ring 14 is provided in the rotating groove. A number of extrusion blocks 1123 in this example are installed on the rotating ring 14. The number of extrusion blocks 1123 is the same as that of the water outlet blocks 3 and are respectively arranged on one side of each water outlet block 3. The rotating ring 14 in this example rotates intermittently through the rotation of the turntable 1121. In order to keep the water output constant and extend the melting time of salt grains and hot water, the rotation of the rotating ring 14 is periodic.

[0076] Specifically, a concave hole 141 is opened at the upper end of the rotating ring 14. A protrusion 1125 is movably installed at the lower end of the turntable 1121. A spring 1126 is provided between the protrusion 1125 and the upper end surface of the turntable 1121. By applying a certain pressure to the upper end of the protrusion 1125, the protrusion 1125 moves towards the concave hole 141. At this time, the spring 1126 is compressed to generate elastic force. At this time, the protrusion 1125 can be inserted into the concave hole 141 and drive the rotating ring 14 to rotate. On the contrary, when no pressure is applied to the top end of the protrusion 1125, the protrusion 1125 will not be inserted into the concave hole 141, so it will not drive the rotating ring 14 to rotate.

[0077] The lifting control of the protrusion 1125 is achieved by the pressure strip 151 installed at the lower end of the top cover 15. Two sliding rods 154 are inserted into the top cover 15, and the pressure strip 151 is sleeved on the two sliding rods 154 for guiding sliding. A return spring 152 is sleeved on each sliding rod 154 and abuts against one end of the pressure strip 151 away from the center of the top cover 15. At the same time, the pressure strip 151 can move along the radial direction of the top cover 15 for guiding.

[0078] In this example, the lower end of the pressure strip 151 is arranged directly above the protrusion 1125 and the end facing the protrusion 1125 is beveled. An abutting piece 1127 is provided at the outer end of the turntable 1121. The movement path of the abutting piece 1127 intersects with one side of the pressure strip 151. An extrusion groove 153 is opened at one end of the pressure strip 151 facing the abutting piece 1127. When the abutting piece 1127 moves into the extrusion groove 153 as the turntable 1121 rotates, it will push the pressure strip 151 to slide. At this time, the pressure strip 151 moves in the direction where the protrusion 1125 is located, and the lower bevel of the pressure strip 151 will gradually press on the upper end of the protrusion 1125. The protrusion 1125 is under pressure and then moves downward and is stuck in the concave hole 141. When the turntable 1121 starts to rotate, the protrusion 1125 will be stuck in the concave hole 141 for a certain period of time until the abutting piece 1127 slides out of the extrusion groove 153 and no longer applies a thrust to the pressure strip 151. Under the action of the return spring 152, the pressure strip 151 returns to its original position. At this time, the protrusion 1125 rebounds and is no longer stuck in the concave hole 141 to drive the rotating ring 14 to rotate. At this time, the extrusion block 1123 just completely rolls over the adjacent water outlet block 3, completing a single water outlet.

[0079] In order to improve the service life of the water outlet block 3, the motor can be reversed after rotating in one direction appropriately for multiple times, so that the water outlet block 3 starts to roll from the other side, avoiding being stressed on one side multiple times and causing elastic fatigue and being difficult to recover deformation.

[0080] In order to increase the water outlet frequency in this example, the number of abutting pieces 1127 can be appropriately increased. A plurality of screw holes are circumferentially distributed at the upper end of the turntable 1121 in this example, and the abutting pieces 1127 are fixed on the surface of the turntable 1121 by screws.

[0081] Please refer to the appendix Figure 17, in the present solution, the cylinder body 1 is arranged at the feeding place of the molten pool 16. The salt solution after being crushed by the cylinder body 1 will enter the molten pool 16. The pure oxygen burner in the molten pool 16 is used to heat the salt solution to 900°-1000°. The water in the salt solution will immediately vaporize into water vapor and be discharged from the furnace (the heat here can be applied as a heat source in the cylinder body 1, and the heat conversion of water vapor is in the prior art and will not be elaborated in this example and is not specifically limited). The low-boiling organic impurities below 700 degrees in the waste salt are vaporized and burned at high temperature, and the burned gas is discharged from the molten pool 16. The salt component in the waste salt solution will melt into a high-temperature molten salt solution. And a certain number of oxygen bubbling devices 162 are arranged at the bottom of the molten pool to accelerate the convection of the molten solution, make the organic matter in the waste salt burn more thoroughly, improve the purity of the salt and shorten the melting time. Finally, the high-purity salt molten solution flows out of the molten pool 16.

[0082] And a flaker 17 is arranged on one side of the molten pool 16. The flowing solution solidifies (cold air treatment) on the flaker 17 and becomes solid and is transmitted by means of a conveyor belt. At the same time, for the convenience of collection, the solidified salt crystals can also be knocked and broken by knocking or vibrating to collect the high-purity salt frost crystals.

[0083] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. An industrial waste salt treatment process, characterized in that, It includes the following steps: Step 1: Put the waste salt blocks into the solid waste liquid receiving hopper for preliminary impurity screening, and put the screened solid-liquid mixture into the melting pool for high-temperature radiation heating; Step 2: When the salt solution enters the melting pool, continuously raise the temperature in the melting pool. In the high-temperature state, the salt solution becomes molten, and the high-boiling solid impurities precipitate; Step 3: The salt solution after high temperature flows out to the flaker for solidification. At the same time, the waste gas after pyrolysis and incineration flows through the pipeline to the tail gas treatment system for purification and is finally discharged; Among them, the solid waste liquid receiving hopper includes: A cylinder body, on the upper end of which is installed a feeding tray for waste salt to enter. A plurality of feeding holes with diameters smaller than the waste salt particles are opened on the tray surface of the feeding tray. Above the feeding tray on the cylinder body, there is a crushing tray that can rotate around the axis direction of the feeding tray, which is used to grind the waste salt between the feeding tray and the crushing tray; A decomposition tower, the overall shape of the decomposition tower is a frustum of a cone with a narrow upper part and a wide lower part. The ground waste salt falls from the feeding hole onto the outer end face of the decomposition tower. An outlet block is also provided on the decomposition tower. The outlet block is filled with hot water and can intermittently pour on the ground waste salt, and the waste salt begins to melt and form a mixed solution; Among them, a precipitation ring is also provided at the lower part of the decomposition tower. The precipitation ring is arranged at the lower end of the decomposition tower and includes two concentrically arranged and annular first chambers and second chambers. The first chamber is used to collect the waste salt solution flowing down from the outer end face of the decomposition tower and overflow the precipitated solution into the second chamber; The crushing tray includes: A turntable, the turntable is rotatably installed on the cylinder body and is concentric and coaxial with the feeding tray; Crushing pieces, the crushing pieces are installed on the turntable, and the distance between the crushing pieces and the feeding tray gradually increases from one side of the turntable rotation direction; Among them, a number of groups of cutting pieces are circumferentially distributed on the upper end face of the feeding tray. Each group of cutting pieces is composed of a number of arc-shaped strips arranged radially along the feeding tray; The feeding tray is integrally in the shape of a bowl with an upward opening. A plurality of feeding holes are provided and are arranged in a staggered manner along the circumferential direction of the bottom of the feeding tray; The precipitation ring includes: A partition plate, the partition plate is concentric and coaxial with the cylinder body and is arranged at the bottom end of the decomposition tower. It forms a first chamber with the decomposition tower and a second chamber with the inner wall of the cylinder body; Among them, a reaction hopper is installed at the bottom end of the cylinder body. The reaction hopper is used to collect the solution overflowing from the precipitation ring, and a heating source is installed inside it to heat the solution at a high temperature and generate water vapor; The outlet block is a water-absorbing sponge, and one side of it penetrates the end wall of the decomposition tower and extends into the decomposition tower to adsorb the water vapor generated from the reaction hopper; Among them, an extrusion block is also provided on the turntable. The extrusion block is arranged on one side of the outlet block and squeezes out the water in the outlet block as the turntable rotates; The decomposition tower also includes: A liquid collecting tank, the liquid collecting tank is installed on the upper inner wall of the decomposition tower and is used to collect the condensed water in the decomposition tower. One end of each outlet block is located in the liquid collecting tank; Wherein, a placing plate is further installed at the lower end of the turntable. The placing plate is integrally in the shape of an inverted dish, and its outer edge extends into the liquid collection tank.

2. The industrial waste salt treatment process according to claim 1, characterized in that: A liquid outlet hole is formed at the bottom end of the second chamber, and the liquid outlet hole communicates with the reaction hopper. Wherein, a static chamber is further provided between the precipitation ring and the reaction hopper. A liquid passing column is provided in the middle of the static chamber, and a through groove communicating with the static chamber and the reaction hopper respectively is formed in the middle of the liquid passing column.

3. The industrial waste salt treatment process according to claim 1, characterized in that, The cylinder body further includes: A rotating ring, which is rotatably installed at the top of the decomposition tower. A plurality of extrusion blocks are provided and installed on the rotating ring, and the plurality of extrusion blocks are respectively arranged on one side of each water outlet block. Wherein, a concave hole is formed at the upper end of the rotating ring, and a protrusion is movably installed at the lower end of the turntable. The protrusion can be inserted into the concave hole to drive the rotating ring to rotate.

4. The industrial waste salt treatment process according to claim 3, wherein The protrusion can elastically lift and lower along the axial direction of the turntable. Wherein, a circular top cover is provided at the upper end of the cylinder body. A pressing strip that can move radially along the top cover is provided at the lower end of the top cover. The lower end of the pressing strip is located directly above the protrusion, and one end thereof facing the protrusion is beveled. A resisting piece is provided at the outer end of the turntable. The moving path of the resisting piece intersects with one side of the pressing strip, and can push the pressing strip towards the direction where the protrusion is located, so that the protrusion moves downward and is stuck in the concave hole.

5. The industrial waste salt treatment process according to claim 4, characterized in that, At least one resisting piece is provided and is detachably connected to the turntable.

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