Industrial waste salt treatment process

Abstract

The invention relates to the technical field of waste salt treatment, in particular to an industrial waste salt treatment process which comprises the following three steps: firstly, waste salt blocks are put into a solid waste liquid receiving hopper for preliminary impurity screening, and a screened solid-liquid mixture is put into a molten pool for high-temperature radiation heating; a molten pool is continuously heated, a salt solution is in a molten state at a high temperature, solid impurities with high boiling points are precipitated, finally, the salt solution passing through the high temperature flows out to a flaker to be solidified, meanwhile, waste gas obtained after pyrolysis and incineration flows through a pipeline to a tail gas treatment system to be purified, and finally the waste gas is discharged. Primary solid impurity screening is carried out on waste salt blocks in the solid waste liquid receiving hopper in advance before high-temperature radiation heating treatment is carried out on the salt solution, the reaction time after the waste salt blocks are put into a molten pool is shortened, and the fuel energy loss needing to be put into the molten pool is reduced to a certain degree.

Description

Technical Field

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

[0002] Industrial waste salt is a by-product of industrial production, but in the existing industry, this waste salt will still undergo a certain amount of secondary refining for economic cost considerations, and it is found that it contains usable industrial salt crystals.

[0003] The treatment of industrial waste salt in the prior art is nothing more than high-temperature melting treatment of the waste salt. By allowing the product in the molten state to undergo a certain oxidation reaction in an aerobic environment, the organic matter in the waste salt is removed by such a chemical method to obtain a salt solution with higher purity. After cooling and crystallization, it can be put into industrial use again. However, this method of directly adding waste salt base materials will greatly increase the duration of high-temperature melting, increasing corporate costs. The reason is that there are a large number of condensates (i.e., insoluble large-particle crystals) in the waste salt base materials. If the solution is to be fully melted, it is necessary to react at a very long high temperature time, which is difficult to decompose through burning and chemical reactions. However, the removal of solid matter from salt solutions that have not yet crystallized has always been a difficulty in the treatment of industrial waste salt.

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

[0005] Technical issues solved

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

[0007] Technical Solution

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

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

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

[0011] Step 2: After the salt solution enters the molten pool, the temperature in the molten pool is continuously raised, and the salt solution becomes molten under high temperature, so that the high-boiling-point solid impurities are precipitated;

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

[0013] Among them, the solid waste liquid receiving hopper includes a cylinder and a decomposition tower, and a feed disk for waste salt to enter is installed at the upper end of the cylinder, and a plurality of discharge holes with a diameter smaller than that of the waste salt particles are opened on the disk surface of the feed disk, and a crushing disk that can rotate around the axial direction of the feed disk is provided on the cylinder and directly above the feed disk, and is used to grind the waste salt between the feed disk and the crushing disk. The decomposition tower is generally in the shape of a truncated cone with a narrow top and a wide bottom. The ground waste salt falls from the discharge hole onto the outer end face of the decomposition tower. The decomposition tower is also provided with a water outlet block, and the water outlet block is filled with hot water and can be intermittently poured on the ground waste salt, and the waste salt begins to melt and form a mixed solution.

[0014] Wherein, a sedimentation ring is also provided at the lower part of the decomposition tower. The sedimentation 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 surface of the decomposition tower, and the precipitated solution overflows into the second chamber.

[0015] Furthermore, the crushing disk includes a turntable and grinding pieces, the turntable is rotatably mounted on the cylinder and is concentric and coaxial with the feed disk, the grinding pieces are mounted on the turntable, and the distance between the grinding pieces and the feed disk gradually increases from one side of the rotation direction of the turntable, wherein a plurality of groups of cutting blades are distributed circumferentially on the upper end surface of the feed disk, and each group of cutting blades is composed of a plurality of arc-shaped arc strips arranged radially along the feed disk.

[0016] Furthermore, the feed tray is in the shape of a bowl with its opening facing upward as a whole, and a plurality of the feed discharge holes are provided and are arranged in a staggered manner along the circumferential direction of the feed tray at the bottom of the feed tray.

[0017] Furthermore, the precipitation ring includes a partition, which is concentric and coaxial with the cylinder and is arranged at the bottom end of the decomposition tower, forming a first chamber between the partition and the decomposition tower, and forming a second chamber with the inner wall of the cylinder, wherein a reaction bucket is installed at the bottom end of the cylinder, and the reaction bucket is used to collect the solution overflowing from the precipitation ring, and a heating source is installed inside the reaction bucket to heat the solution at high temperature and generate water vapor.

[0018] Furthermore, the water outlet block is a water-absorbing sponge, one side of which penetrates the end wall of the decomposition tower and extends into the interior of the decomposition tower to absorb water vapor generated in the reaction bucket, wherein the turntable is also provided with an extrusion block, which is arranged on one side of the water outlet block and squeezes out the water in the water outlet block as the turntable rotates.

[0019] Furthermore, the decomposition tower also includes a liquid collecting tank, which is installed on the upper inner wall of the decomposition tower and is used to collect water condensed in the decomposition tower. One end of each water outlet block is located in the liquid collecting tank, wherein a pendulum plate is also installed at the lower end of the turntable. The pendulum plate is generally in the shape of an inverted plate, and its outer edge extends toward the liquid collecting tank.

[0020] Furthermore, a liquid outlet is provided at the bottom end of the second chamber, and the liquid outlet is communicated with the reaction bucket. A static chamber is also provided between the sedimentation ring and the reaction bucket, and a liquid column is provided in the middle of the static chamber. A through groove is provided in the middle of the liquid column, which is communicated with the static chamber and the reaction bucket respectively.

[0021] Furthermore, the cylinder body also includes a rotating ring, which is rotatably installed on 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, wherein a concave hole is opened at the upper end of the rotating ring, and a protrusion is movably installed at the lower end of the turntable, and the protrusion can be inserted into the concave hole and drive the rotating ring to rotate.

[0022] Furthermore, the protrusion can be elastically lifted and lowered along the axial direction of the turntable, wherein a circular top cover is provided at the upper end of the cylinder, and a pressure strip that can move radially along the top cover is provided at the lower end of the top cover, the lower end of the pressure strip is arranged directly above the protrusion and its end facing the protrusion is inclined, and a stop piece is provided at the outer end of the turntable, the moving path of the stop piece intersects with one side of the pressure strip, and the pressure strip can be pushed in the direction of the protrusion, so that the protrusion moves downward and is stuck in the concave hole.

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

[0024] Beneficial Effects

[0025] Compared with the known public technology, the technical solution provided by the present invention has the following beneficial effects:

[0026] The present invention uses grinding chips to break up large particles of waste salt before subjecting the salt solution to high-temperature radiation heating treatment, and granulates some large particles inside. Then, hot water is added to the granulated waste salt, and the small particles of waste salt quickly melt when they meet water to form a high-viscosity salt solution. The obtained product is precipitated in a precipitation ring, and the insoluble solid impurities in the salt solution are separated, thereby effectively reducing the proportion of insoluble impurities in the waste salt, reducing the required energy consumption, and reducing enterprise costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a schematic diagram of the waste salt treatment process in an embodiment of the present invention;

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

[0030] Figure 3 It is a schematic diagram of the overall structure in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of the decomposition structure of the grinding pieces in the embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the top cover structure in an embodiment of the present invention when viewed from above;

[0033] Figure 6 It is a partial side cross-sectional schematic diagram of the main structure in an embodiment of the present invention;

[0034] Figure 7 It is a side cross-sectional schematic diagram of the internal structure of the cylinder in an embodiment of the present invention;

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

[0036] Fig. 9 This is a schematic diagram of the decomposition tower structure in an embodiment of the present invention;

[0037] Fig.10 This is a schematic diagram of the structure of the extrusion block in an embodiment of the present invention;

[0038] Fig.11 It is a schematic diagram of a top cover in a top view of an embodiment of the present invention;

[0039] Fig.12 In the embodiment of the present invention Fig.10 Schematic diagram of the structure at B in the middle;

[0040] Fig.13 This is a schematic diagram of the structure of the turntable in an embodiment of the present invention when viewed from above;

[0041] Fig.14 In the embodiment of the present invention Fig.12 Schematic diagram of the structure at C in the middle;

[0042] Fig.15 This is a schematic diagram of the motion state of the protrusion in an embodiment of the present invention;

[0043] Fig.16 This is a schematic diagram of the structure of the cylinder and the waste salt melting furnace in an embodiment of the present invention;

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

[0045] The numbers in the figure represent: 1, cylinder; 11, feed plate; 111, feed hole; 112, crushing plate; 1121, rotating plate; 1122, grinding pieces; 1123, extrusion block; 1124, swing plate; 1125, protrusion; 1126, spring; 1127, stopper; 113, arc strip; 13, reaction bucket; 14, rotating ring; 141, concave hole; 15, top cover; 151, pressure strip; 152, return spring; 15 3. Extrusion trough; 154. Slide bar; 16. Molten pool; 161. Screw feeder; 162. Oxygen bubbling device; 17. Flake machine; 18. Oxidation chamber; 19. Tail gas treatment system; 2. Decomposition tower; 21. Sedimentation ring; 211. First chamber; 2111. Filter bucket; 212. Second chamber; 2121. Liquid outlet; 213. Partition; 22. Liquid collecting tank; 23. Standing chamber; 231. Liquid column; 3. Water outlet block. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] The present invention will be further described below in conjunction with the embodiments.

[0048] Example:

[0049] At present, a large amount of by-product salt is produced in the industrial production process. Most of the by-product salt is dissolved in industrial water. The salt water is mixed with some organic matter and some impurities due to the many process links. The by-product salt obtained by evaporation and crystallization is an industrial waste salt containing salt, water and a small amount of other impurities, which cannot be directly used as raw materials for downstream products.

[0050] The by-product industrial salt is the main industrial raw material for chemical production and a recyclable resource. The main treatment method at present is to subject the by-product industrial salt to high-temperature treatment to make the waste salt molten. The waste salt is burned to become water and some organic matter, and then react with oxygen. After the organic matter comes into contact with oxygen, it is pyrolyzed and burned to become some nitrogen oxides and other substances. The flue gas enters the exhaust gas treatment system for treatment and then meets the emission standards. The remaining salt solution is crystallized into high-purity industrial salt. However, there are still some substances with a large specific gravity in the waste salt (large-grained crystals formed by nitrides, inorganic substances and some chlorides, which take a long time to fully reach a molten state, and the energy consumption for melting is greater than the recovery value). They are difficult to decompose by burning and chemical reactions. After the salt solution is crystallized, additional removal is required. However, the removal of solid matter from the salt solution that has not yet crystallized under high-temperature conditions has always been a difficulty in waste salt treatment.

[0051] Combined with our company's previous structural design, two independent areas are set at the bottom of the melting furnace. The waste salt solution in a high temperature environment will begin to melt, and the solid impurities will settle under this high temperature state and sink into one of the areas separately, while the other area is used to separate the salt in the molten state from the impurities to achieve the purpose of removing solid impurities (application number is 201920235359.5, an industrial waste salt melting treatment device). This method of removing solid impurities has been tested by our company many times and has the following shortcomings. 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 impurity salt blocks, which consumes more energy, and 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] To this end, combined with the Figure 1-17 The present invention provides an industrial waste salt treatment process, comprising the following steps:

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

[0054] Secondly, when the salt solution in a solid-liquid mixed state enters the molten pool 16 batch by batch through the screw feeder 161, the temperature in the molten pool 16 is continuously raised, and the salt solution is molten under high temperature, so that the high-boiling-point solid impurities are precipitated;

[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 finally discharged.

[0056] Compared with the prior art, the conventional method of directly throwing waste salt blocks into the molten pool 16 is abandoned. Before throwing them in, preliminary impurity screening is performed to reduce the reaction time in the molten pool, effectively reduce fuel input consumption, and also prevent impurities from being melted under high temperature and mixed into the salt solution, which is difficult to precipitate.

[0057] Reference Figure 1 An oxidation chamber 18 is connected above the molten pool, and the oxidation chamber 18 provides heat to the molten pool 16 through a pure oxygen burner. Under high temperature conditions, the solid-liquid mixture put into the molten pool 16 will quickly become a molten state under high temperature conditions, and further solid impurities will be screened (the principle of screening solid impurities by melting is a prior art and will not be elaborated on here).

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

[0059] The outflowing molten salt liquid will flow to the flaker 17 for transformation from liquid to solid, and the solution will be quickly crystallized by applying cold air to obtain high-purity salt frost. The exhaust gas generated by the combustion of organic matter in the molten pool 16 will be purified by the exhaust gas treatment system 19 and discharged after purification (the exhaust gas treatment system 19 is used to treat some nitrogen oxides, water, chlorides and other exhaust gases, and the treatment means are well-known technologies, which will not be elaborated in this example).

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

[0061] The purpose of the structure set in the solid waste liquid receiving hopper in the present scheme is to crush the industrial waste salt before the salt solution is subjected to high-temperature radiation heating treatment, to granulate some large-particle specific gravity materials inside, and the small-particle waste salt quickly melts when it meets water to form a high-viscosity salt solution. At the same time, the insoluble solid impurities in the salt solution are separated, so that the material entering the molten pool 16 is already a salt solution with a certain amount of impurities removed. After high-temperature radiation and oxidation treatment (that is, entering the molten pool 16 in this example for reaction), a solution of industrial salt in a molten state with high purity and few impurities is obtained, and high-purity crystals are obtained after cooling. This not only reduces the time required for solid sedimentation and impurity melting, greatly reduces the working time of the molten pool 16, reduces energy consumption, but also reduces the number of times the impurities in the molten pool 16 are cleaned, effectively improving the production and processing efficiency of the enterprise.

[0062] Specifically in this case, first, the whole equipment includes two parts, namely a cylinder 1 and a decomposition tower 2. A circular top cover 15 is installed on the upper end of the cylinder 1. A plurality of openings for pouring waste salt base materials are opened on the end surface of the top cover 15. A feed 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 precipitated from the decomposition tower 2 and a reaction bucket 13 for heating the precipitated solution are arranged in sequence in the cylinder 1 from the bottom of the top cover 15. A certain heating source is arranged in the reaction bucket 13 to heat the solution at high temperature and generate water vapor. The selection of the heating source in this example is not specifically limited. Since the present device is based on the use of a 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 to allow the solution to generate water vapor and accelerate the melting speed, thereby removing solid insoluble impurities.

[0063] When the waste salt enters the feed tray 11 from the top cover 15, the crushing disk 112 arranged above the feed tray 11 will start to rotate, and the large-size waste salt falling between the feed tray 11 and the crushing disk 112 will be squeezed and crushed until it can fall from the discharge hole 111 arranged on the feed tray 11. At this time, the volume of the waste salt is greatly reduced. In the actual process, the temperature of the entire equipment is relatively high. 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 and the smaller volume When the waste salt particles fall from the discharge hole 111 onto the outer end surface of the truncated cone-shaped decomposition tower 2, they will be retained 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 allow all the salt particles to roll off, and the volume of the broken salt particles in this scheme is small, so most of them will adhere to the outer end 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 salt particle adhesion area, the salt particles will begin to melt 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 is a certain amount of insoluble waste impurities. The solution flowing down from the decomposition tower 2 will immediately enter the sedimentation ring 21 located at the bottom of the decomposition tower 2 for sedimentation. The sedimentation ring 21 is divided into two concentrically 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 insoluble impurities just added with a density greater than that of the solution will sink quickly). The purity of the solution at the top is relatively high. A filter bucket 2111 is also provided 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 entering the second chamber 212 will flow into the static chamber 23, and a liquid column 231 with a certain height is arranged in the middle of the static chamber 23. A through groove connected with the static chamber 23 and the reaction bucket 13 is opened in the middle of the liquid column 231, so as to further perform a certain precipitation treatment on the solution. Compared with directly putting the waste salt into the melting treatment, the solution flowing into the reaction bucket 13 is more efficient and improves the product quality.

[0066] Specifically in the present embodiment, the feed tray 11 is in the shape of a bowl with an opening facing upward, and its side end is an arc surface, so that the salt particles will not be arched to the side and difficult to push, and a plurality of discharge holes 111 are provided on the surface of the feed tray 11 and are staggered along the circumferential direction of the feed tray 11 at the bottom of the feed tray 11, that is, the plurality of discharge holes 111 are arranged in a circle as a whole, but in the circumferential direction, the front and rear holes are staggered, so that the ground salt particles will always fall down the holes at a certain stage during the transmission process, and the diameter of the discharge hole 111 is smaller than the waste salt particles, and at the same time, the crushing disk 112 located directly above the feed tray 11 can rotate around the axial direction of the feed tray 11 The crushing disk 112 is divided into two parts, namely, a rotatable turntable 1121, and ground pieces 1122 installed on the turntable 1121. The turntable 1121 is coaxial with the feed disk 11, and the distance between the ground pieces 1122 and the feed disk 11 gradually increases from one side of the rotation direction of the turntable 1121, that is, the entire ground pieces 1122 are in an arc shape, and one end facing the feed disk 11 is in an arc shape, and the end surface of the ground pieces 1122 facing the rotation direction of the turntable 1121 is an inclined surface, so that during the rotation of the turntable 1121, the salt particles can be gathered up (the turntable 1121 in this example adopts the method shown in the attached figure). Figure 1 The driving mechanism in the embodiment uses a motor and a connecting belt to drive the turntable 1121 to rotate, which is common knowledge and is not specifically limited here).

[0067] A number of cutting blades are installed on the surface of the feed disk 11, and each group of cutting blades is composed of four arc-shaped arc strips 113 arranged radially along the feed disk 11. When the salt particles are rotated by the turntable 1121 and move on the feed disk 11, they will collide with the cutting blades, and the passing salt particles will be broken by the cutting blades. The salt particles that can pass through the discharge hole 111 meet the salt particle size requirements for melting. Considering the processing environment inside the equipment, which is humid and has a certain temperature (the ambient temperature is between 50°-100°), the melting speed of the salt particles will be faster. Under the comprehensive environment of friction and melting, the melting speed of the salt particles is accelerated.

[0068] The decomposition tower 2 is generally in the shape of a truncated cone that is narrow at the top and wide at the bottom. The ground waste salt falls from the discharge hole 111 onto the outer end surface of the decomposition tower 2 (the area of ​​the salt particles that fall into the decomposition tower 2 is generally ring-shaped). A water outlet block 3 that can intermittently discharge hot water is also provided on the decomposition tower 2. The water outlet block 3 is located above the salt particle distribution area (the hot water discharge rate in this example is less than the accumulated amount of salt particles. In practice, it takes about one full rotation of the turntable 1121 to replenish a certain amount of water, and the amount of water is small, giving the salt particles sufficient time to melt). At this time, the waste salt begins to melt and form a mixed solution.

[0069] The precipitation ring 21 installed at the bottom of the decomposition tower 2 not only collects such a mixed solution, but also provides a relatively independent area for the solution to precipitate and removes impurities with heavier weight. When the liquid level of the solution above the precipitation area is higher than a certain level, it will begin to overflow. The specific gravity of the solid insoluble substances contained in the overflowed solution is greatly reduced. After many tests by our company, the time and energy consumed for the solution to reach a completely molten state at this time are much lower than the energy and time required for the melting operation of solid large particles and agglomerated waste salt in the initial state (time saving of about 70%).

[0070] The sedimentation ring 21 in this example is arranged at the lower end of the decomposition tower 2, and 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 surface of the decomposition tower 2, and overflow the precipitated solution into the second chamber 212. The bottom of the second chamber 212 is provided with a liquid outlet 2121, which is communicated with the reaction bucket 13. A static chamber 23 is also provided between the sedimentation ring 21 and the reaction bucket 13. A liquid column 231 is provided in the middle of the static chamber 23. A through groove communicating with the static chamber 23 and the reaction bucket 13 is provided in the middle of the liquid column 231. The liquid column 231 and the two chambers are used in coordination to extend the sedimentation time and effect.

[0071] The crushing disk 112 includes an annular partition 213, which is concentric and coaxial with the cylinder 1 and the decomposition tower 2 and is arranged at the bottom end of the decomposition tower 2. The partition 213 forms a first chamber 211 between the partition and the decomposition tower 2, and forms a second chamber 212 with the inner wall of the cylinder 1. The inclined surface of the decomposition tower 2 faces the interior of the first chamber 211, and the melted mixed solution will enter the first chamber 211 at the first time.

[0072] The water outlet block 3 arranged on the decomposition tower 2 adopts a water-absorbing sponge in this scheme. One end of the water outlet block 3 toward the inner side of the decomposition tower 2 penetrates the end wall of the decomposition tower 2 and extends into the decomposition tower 2 to absorb the water vapor generated in the self-reaction bucket 13. In order to increase the collection speed, a liquid collecting trough 22 is added to the inner side of the decomposition tower 2. The liquid collecting trough 22 is installed on the upper inner wall of the decomposition tower 2 to collect the water condensed from the decomposition tower 2. The water vapor will begin to condense when it encounters the top wall of the decomposition tower 2 during the rising process. The top of the inner side of the decomposition tower 2 is set to a round surface, and the liquid collecting trough 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 collecting trough 22 to absorb internal moisture. In actual use, the water outlet block 3 can also be properly moistened in advance. Since the water output and water output frequency are not required to be high, the absorption of water vapor can fully meet the water consumption rate.

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

[0074] The squeezing block 1123 provided on the rotating disk 1121 is used in conjunction with the water outlet block 3 in this example. The squeezing block 1123 is provided on one side of the water outlet block 3 and squeezes out the water in the water outlet block 3 as the rotating disk 1121 rotates.

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

[0076] Specifically, a recessed hole 141 is provided at the upper end of the swivel 14, and 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 is moved toward the recessed 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 recessed hole 141 and drive the swivel 14 to rotate. On the contrary, when the top end of the protrusion 1125 is not subjected to pressure, the protrusion 1125 will not be inserted into the recessed hole 141, thereby not driving the swivel 14 to rotate.

[0077] The lifting and lowering control of the protrusion 1125 is achieved by installing a pressure strip 151 at the lower end of the top cover 15. Two sliding rods 154 are inserted on the top cover 15, and the pressure strip 151 is guided to slide on the two sliding rods 154. Each sliding rod 154 is covered with a return spring 152 and abuts against the 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 guide of the top cover 15.

[0078] The lower end of the pressure strip 151 in this example is arranged just above the protrusion 1125 and the end thereof facing the protrusion 1125 is inclined. A stopper 1127 is arranged at the outer end of the turntable 1121. The moving path of the stopper 1127 intersects with one side of the pressure strip 151. An extrusion groove 153 is arranged at the end of the pressure strip 151 facing the stopper 1127. When the stopper 1127 moves into the extrusion groove 153 as the turntable 1121 rotates, the pressure strip 151 is pushed to slide. At this time, the pressure strip 151 moves in the direction of the protrusion 1125, and the lower end inclined surface of the pressure strip 151 gradually increases. The upper end of the protrusion 1125 is pressed, and the protrusion 1125 is subjected to pressure. At this time, it moves downward and is stuck in the recessed hole 141. When the turntable 1121 starts to rotate, the protrusion 1125 will be squeezed in the recessed hole 141 for a certain period of time until the stop piece 1127 slides out of the extrusion groove 153 and no longer applies thrust to the pressure strip 151. Under the action of the reset 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 recessed hole 141, driving the swivel 14 to rotate. At this time, the extrusion block 1123 just completely rolls over the adjacent water outlet block 3 to complete a single water outlet.

[0079] In order to increase the service life of the water outlet block 3, the motor can be reversed after appropriate unidirectional rotation for multiple times, so that the water outlet block 3 can be rolled from the other side to avoid multiple forces on one side, resulting in elastic fatigue and difficulty in restoring deformation.

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

[0081] Please refer to the attached Fig.17The barrel 1 in this scheme is arranged at the feed point of the molten pool 16, and the salt solution after the crushing treatment of the barrel 1 will enter the molten pool 16, and the pure oxygen burner in the molten pool 16 is used to heat the salt solution at 900°-1000°, and the water in the salt solution will be immediately gasified into water vapor and discharged from the furnace (the heat here can be applied to the barrel 1 as a heat source, and the heat of water vapor is converted into known prior art. This example is not too detailed and is not specifically limited), and the low-boiling point organic impurities below 700 degrees in the waste salt are gasified and incinerated at high temperature, and the incinerated gas is discharged from the molten pool 16, and the salt component in the waste salt solution will melt into a high-temperature salt melt, and a certain number of oxygen bubbling devices 162 are arranged at the bottom of the molten pool to accelerate the convection of the melt, so that the organic matter in the waste salt is burned more thoroughly, the purity of the salt is improved and the melting time is shortened, and finally the high-purity salt melt flows out of the molten pool 16.

[0082] On one side of the molten pool 16, a flaker 17 is provided. The outflowing solution solidifies (treated with cold air) on the flaker 17 to become a solid and is transmitted out through a transmission belt. To facilitate collection, the solidified salt crystals can be broken up and collected by knocking or vibrating to obtain 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to 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: The steps include: Step 1: Put the waste salt block into the solid waste liquid receiving hopper for preliminary impurity screening, and put the screened solid-liquid mixture into the molten pool for high-temperature radiation heating; Step 2: After the salt solution enters the molten pool, the temperature in the molten pool is continuously raised, and the salt solution becomes molten under high temperature, so that the high-boiling-point solid impurities are precipitated; Step 3: The salt solution after high temperature flows out to the flaker for solidification, and the waste gas after pyrolysis and incineration flows through the pipeline to the tail gas treatment system for purification and finally discharged; Wherein, the solid waste liquid receiving hopper comprises: A cylinder, a feed disc for waste salt to enter is installed at the upper end of the cylinder, a plurality of discharge holes with diameters smaller than that of waste salt particles are opened on the surface of the feed disc, and a crushing disc that can rotate around the axis of the feed disc is arranged on the cylinder and directly above the feed disc, and is used to grind the waste salt between the feed disc and the crushing disc; The decomposition tower is in the shape of a truncated cone with a narrow top and a wide bottom. The ground waste salt falls from the feed hole onto the outer end surface of the decomposition tower. The decomposition tower is also provided with a water outlet block. The water outlet block is filled with hot water and can be intermittently poured on the ground waste salt. The waste salt begins to melt and form a mixed solution. Wherein, a sedimentation ring is also provided at the lower part of the decomposition tower. The sedimentation 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 surface of the decomposition tower, and the precipitated solution overflows into the second chamber.

2. The industrial waste salt treatment process according to claim 1, characterized in that: The crushing disk comprises: A turntable, which is rotatably mounted on the cylinder and is coaxial with the feed disc; Grinding pieces, wherein the grinding pieces are mounted on a rotating disk, and the distance between the grinding pieces and the feed disk gradually increases from one side of the rotating direction of the rotating disk; Among them, a plurality of groups of cutting blades are distributed on the circumference of the upper end surface of the feed disc, and each group of cutting blades is composed of a plurality of arc-shaped arc strips arranged radially along the feed disc.

3. The industrial waste salt treatment process according to claim 2, characterized in that: The feed tray is generally in the shape of a bowl with its opening facing upwards, and a plurality of feed discharge holes are provided and are arranged in a staggered manner along the circumferential direction of the feed tray at the bottom of the feed tray.

4. The industrial waste salt treatment process according to claim 3, characterized in that: The precipitation ring comprises: A partition, the partition is coaxial with the cylinder and is disposed at the bottom of the decomposition tower, the partition forms a first chamber with the decomposition tower, and forms a second chamber with the inner wall of the cylinder; Wherein, a reaction bucket is installed at the bottom end of the cylinder, and the reaction bucket is used to collect the solution overflowing from the precipitation ring, and a heating source is installed inside the reaction bucket to heat the solution at high temperature and generate water vapor.

5. The process for treating industrial waste salt according to claim 4, characterized in that: The water outlet block is a water-absorbing sponge, one side of which penetrates the end wall of the decomposition tower and extends into the decomposition tower to absorb the water vapor generated in the reaction bucket; Wherein, the rotating disk is also provided with an extrusion block, which is arranged on one side of the water outlet block and squeezes out the water in the water outlet block as the rotating disk rotates.

6. The process for treating industrial waste salt according to claim 5, characterized in that: The decomposition tower also includes: A liquid collecting tank, which is installed on the upper inner wall of the decomposition tower and is used to collect the water condensed in the decomposition tower, and one end of each of the water outlet blocks is located in the liquid collecting tank; A wobble plate is installed at the lower end of the turntable. The wobble plate is in the shape of an inverted plate as a whole, and its outer edge extends toward the liquid collecting tank.

7. An industrial waste salt treatment process according to claim 4 or 6, characterized in that: A liquid outlet is provided at the bottom end of the second chamber, and the liquid outlet is communicated with the reaction bucket; A static chamber is provided between the sedimentation ring and the reaction bucket, a liquid column is provided in the middle of the static chamber, and a through groove which communicates with the static chamber and the reaction bucket is provided in the middle of the liquid column.

8. The process for treating industrial waste salt according to claim 5, characterized in that: The cylinder also includes: A rotating ring is rotatably mounted on the top of the decomposition tower, and a plurality of extrusion blocks are provided and mounted on the rotating ring, and the plurality of extrusion blocks are respectively arranged on one side of each water outlet block; A concave hole is provided at the upper end of the rotating ring, and a protrusion is movably installed at the lower end of the rotating disk. The protrusion can be inserted into the concave hole and drive the rotating ring to rotate.

9. The process for treating industrial waste salt according to claim 8, characterized in that: The protrusion can be elastically lifted and lowered along the axial direction of the rotating disk; Among them, a circular top cover is provided at the upper end of the cylinder, and a pressure strip which can move radially along the top cover is provided at the lower end of the top cover. The lower end of the pressure strip is arranged directly above the protrusion and its end facing the protrusion is inclined. A stop piece is provided at the outer end of the turntable. The moving path of the stop piece intersects with one side of the pressure strip and can push the pressure strip in the direction of the protrusion, so that the protrusion moves downward and is stuck in the concave hole.

10. The process for treating industrial waste salt according to claim 9, characterized in that: The abutment sheet is at least one and is detachably connected to the rotating disk.

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