Ammonium-containing waste salt resourceful treatment device

Abstract

The utility model discloses an ammonium-containing waste salt resourceful treatment device. A pulping mechanism of the ammonium-containing waste salt resourceful treatment device comprises a wet ball mill, a shredder and a process water pump, wherein the shredder and the process water pump are respectively connected with the wet ball mill; the volatile impurity stripping mechanism comprises an acid adjusting kettle, an acid stripping tower and a condenser which are connected in sequence, and the acid adjusting kettle is also connected with the wet ball mill; the ammonia gas stripping and absorbing mechanism comprises an alkali adjusting kettle, an alkaline stripping tower and an ammonia gas absorbing tower which are connected in sequence, and the alkali adjusting kettle is also connected with an acidic stripping tower; the ammonium removal waste salt recycling mechanism comprises a slurry filter, a liquid phase delivery pump, an evaporation crystallizer, and a press dryer, a salt dissolving tank, a salt dissolving liquid filter, a flocculation filter tank, an oxidation filter tank, an adsorption filter tank and an MVR evaporation crystallizer which are connected in sequence; the slurry filter is respectively connected with the alkaline stripping tower, the liquid phase delivery pump, the evaporation crystallizer and the drying press, and the liquid phase delivery pump is connected with the wet ball mill. According to the device, low-cost, low-waste-gas-emission and efficient resourceful treatment of the ammonium-containing waste salt can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of waste salt treatment, in particular to a resource treatment device for ammonium-containing waste salt. Background Art

[0002] At present, the resource treatment of ammonium-containing industrial waste salt mostly adopts pyrolysis, but the pyrolysis process is uncontrollable, and the final TOC residue and carbon generation are difficult to control. Moreover, if the easily decomposable substances such as ammonium chloride contained in the salt are pyrolyzed together with organic matter, dioxins and other irritating highly toxic substances and strong corrosive substances such as hydrogen chloride, ammonia and chlorine will be produced, which will harm the equipment, cause great environmental pollution and high production costs. It is of great practical significance to develop a treatment device that can convert ammonium salt in ammonium-containing waste salt into ammonia for secondary utilization and avoid environmental pollution and equipment corrosion caused by harmful gases generated by high-temperature pyrolysis. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the above-mentioned prior art and provide a resource processing device for ammonium-containing waste salt, which can achieve low-cost, low waste gas emission, and efficient resource processing of ammonium-containing waste salt, and avoid the generation of harmful gases to cause environmental pollution and equipment corrosion.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A device for recycling ammonium-containing waste salt comprises a pulping mechanism, a volatile impurity stripping mechanism, an ammonia stripping and absorption mechanism, and an ammonium-removing waste salt recycling mechanism, wherein the pulping mechanism comprises a wet ball mill, a shredder connected to one feed port of the wet ball mill, and a process water pump connected to another feed port of the wet ball mill; the volatile impurity stripping mechanism comprises an acid regulating kettle, an acid stripping tower connected to a discharge port of the acid regulating kettle, and a condenser connected to a gas discharge port of the acid stripping tower, wherein the feed port of the acid regulating kettle is connected to the discharge port of the wet ball mill; the ammonia stripping and absorption mechanism comprises an alkali regulating kettle, an alkaline stripping tower connected to the discharge port of the alkali regulating kettle, and an ammonia absorption tower connected to the gas discharge port of the alkaline stripping tower, wherein the alkali regulating kettle is connected to the discharge port of the wet ball mill; The feed inlet of the alkali kettle is connected to the liquid discharge port of the acidic stripping tower; the ammonium waste salt resource recovery mechanism includes a slurry filter, a liquid phase delivery pump, an evaporation crystallizer, and a squeeze dryer, a salt dissolving tank, a salt solution filter, a flocculation filter tank, an oxidation filter tank, an adsorption filter tank, and an MVR evaporation crystallizer connected in sequence. The slurry filter includes a slurry feed inlet, a liquid phase discharge port, and a solid phase discharge port. The slurry feed inlet of the slurry filter is connected to the liquid discharge port of the alkaline stripping tower, and the liquid phase discharge port of the slurry filter is respectively connected to the liquid phase delivery pump and the evaporation crystallizer. The liquid outlet of the liquid phase delivery pump is connected to another feed inlet of the wet ball mill, and the solid phase discharge port of the slurry filter is connected to the feed inlet of the squeeze dryer.

[0006] The shredder feed port is connected with a waste salt feeder.

[0007] The acid regulating kettle is connected with an acid adding device.

[0008] The condenser comprises a tail gas discharge port and a waste liquid discharge port, the waste liquid discharge port of the condenser is connected to the waste liquid incinerator, and the tail gas discharge port of the condenser is connected to the VOC treatment system.

[0009] The alkali adjusting kettle is connected with an alkali adding device.

[0010] The ammonia absorption tower comprises a tail gas outlet, and the tail gas outlet of the ammonia absorption tower is connected to a tail gas acid washing tower.

[0011] The liquid phase discharge port of the slurry filter is connected to a liquid phase delivery pump and an evaporation crystallizer through a three-way valve; when the organic matter content in the liquid phase discharged from the slurry filter is less than 5000 mg / L, the liquid phase is delivered to a wet ball mill through a liquid phase delivery pump; when the organic matter content in the liquid phase discharged from the filter is ≥5000 mg / L, the liquid phase is delivered to the evaporation crystallizer, and the discharge port of the evaporation crystallizer is connected to a pyrolysis furnace for organic waste salt.

[0012] The MVR evaporation crystallizer comprises a crystallization condensed water outlet, the crystallization condensed water outlet is connected to a condensed water delivery pump, and the condensed water delivery pump is connected to a liquid inlet of a salt dissolving tank.

[0013] The flocculation filtration tank is connected to a flocculant feeder, the oxidation filtration tank is connected to an oxidant feeder, and the adsorption filtration tank is connected to an adsorbent feeder.

[0014] The ammonium removal waste salt resource utilization mechanism also includes a filter residue pyrolysis furnace and an incinerator. The dissolved salt solution filter, flocculation filter tank, and oxidation filter tank are all connected to the filter residue pyrolysis furnace, and the adsorption filter tank is connected to the incinerator.

[0015] The beneficial effects of the utility model are:

[0016] The device can first make ammonium-containing waste salt into slurry, then remove volatile impurities in the slurry through acidic stripping, then remove ammonia through alkaline stripping and absorb ammonia to make ammonia water, then separate the slurry after stripping into liquid and solid phases, and then make the solid phase into dissolved salt solution, and make industrial regenerated salt through impurity removal and crystallization steps, thus realizing low-cost, low waste gas emission and efficient resource utilization treatment of ammonium-containing waste salt, and also solving the problem of environmental pollution and equipment corrosion caused by harmful gases generated by high-temperature pyrolysis method for treating ammonium-containing waste salt in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a flow chart of the utility model;

[0018] Figure 2 It is a schematic diagram of the structure of the improved salt dissolving kettle of the present invention;

[0019] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0020] Figure 4 It is a three-dimensional schematic diagram of the abutment between the first ball and the second ball.

[0021] In the figure: waste salt feeder 1, shredder 2, wet ball mill 3, process water pump 4, acid adjustment kettle 5, acidifier 6, acid stripping tower 7, condenser 8, waste liquid incinerator 9, VOC treatment system 10, alkali adjustment kettle 11, alkaliifier 12, alkaline stripping tower 13, ammonia absorption tower 14, tail gas acid washing tower 15, slurry filter 16, liquid phase delivery pump 17, evaporation crystallizer 18, organic waste salt pyrolysis furnace 19, squeeze dryer 20, salt dissolving tank 21, tank body 211, round ball 2111, first universal ball 2112, connecting ring 212, A stirring paddle 213, a ball piece 214, a first ball 2141, a second ball 2142, a groove 2143, a groove A 2144, a groove B 2145, a second universal ball 2146, a first motor 215, a connecting shaft 216, a second motor 217, a salt solution filter 22, a flocculation filter tank 23, an oxidation filter tank 24, an adsorption filter tank 25, an MVR evaporation crystallizer 26, a condensate delivery pump 27, a flocculant feeder 28, an oxidant feeder 29, an adsorbent feeder 30, a residue pyrolysis furnace 31, and an incinerator 32. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0023] like Figure 1 As shown, a waste salt resource processing device containing ammonium includes a pulping mechanism, a volatile impurity stripping mechanism, an ammonia stripping and absorption mechanism, and an ammonium removal waste salt resource mechanism. The pulping mechanism includes a wet ball mill 3, a shredder 2 connected to one feed port of the wet ball mill 3, and a process water pump 4 connected to another feed port of the wet ball mill 3. The feed port of the shredder 2 is connected to a waste salt feeder 1. The waste salt containing ammonium contains ammonium inorganic salts, non-ammonium inorganic salts, organic matter and other substances. The waste salt containing ammonium is ground into a slurry with a particle size of 80-325 mesh by the wet ball mill 3, so that the soluble organic matter is dissolved, and the soluble ammonium inorganic salts in the waste salt containing ammonium are dissolved to become a saturated or supersaturated solution.

[0024] The volatile impurity stripping mechanism includes an acid conditioning kettle 5, an acid stripping tower 7 connected to the discharge port of the acid conditioning kettle 5, and a condenser 8 connected to the gas discharge port of the acid stripping tower 7. The feed port of the acid conditioning kettle 5 is connected to the discharge port of the wet ball mill 3. The acid conditioning kettle 5 is connected to an acidifier 6. The condenser 8 includes a tail gas discharge port and a waste liquid discharge port. The waste liquid discharge port of the condenser 8 is connected to a waste liquid incinerator 9, and the tail gas discharge port of the condenser 8 is connected to a VOC treatment system 10. Liquid acid is added to the acid conditioning kettle 5 through the acidifier 6 to adjust the pH value of the slurry to 1-3. Since ammonium ions do not overflow or only overflow in a small amount under acidic conditions, volatile impurities will be removed by stripping, thereby ensuring that the ammonia generated in the subsequent ammonia stripping step is not mixed with or less mixed with volatile impurities.

[0025] The ammonia stripping and absorption mechanism includes an alkali adjustment kettle 11, an alkaline stripping tower 13 connected to the discharge port of the alkali adjustment kettle 11, and an ammonia absorption tower 14 connected to the gas discharge port of the alkaline stripping tower 13. The feed port of the alkali adjustment kettle 11 is connected to the liquid discharge port of the acid stripping tower 7; the alkali adjustment kettle 11 is connected to an alkali adder 12; the ammonia absorption tower 14 includes a tail gas outlet, and the tail gas outlet of the ammonia absorption tower 14 is connected to a tail gas acid washing tower 15. Alkali is added to the alkali adjustment kettle 11 through the alkali adder 12, so as to adjust the pH value of the slurry to 12-14. Since ammonium ions react with OH under alkaline conditions (pH ≥ 12), - The reaction generates ammonia water molecules, which can generate ammonia gas after stripping, and the ammonia gas is converted into ammonia water through an ammonia absorption tower 14, thereby realizing the conversion of ammonium in ammonium-containing waste salt.

[0026] The ammonium removal waste salt resource mechanism includes a slurry filter 16, a liquid phase delivery pump 17, an evaporation crystallizer 18, and a squeeze dryer 20, a salt dissolving tank 21, a salt dissolving liquid filter 22, a flocculation filter tank 23, an oxidation filter tank 24, an adsorption filter tank 25, and an MVR evaporation crystallizer 26 connected in sequence. The slurry filter 16 includes a slurry feed port, a liquid phase discharge port, and a solid phase discharge port. The slurry feed port of the slurry filter 16 is connected to the liquid discharge port of the alkaline stripping tower 13, the liquid phase discharge port of the slurry filter 16 is respectively connected to the liquid phase delivery pump 17 and the evaporation crystallizer 18, the liquid outlet of the liquid phase delivery pump 17 is connected to another feed port of the wet ball mill 3, and the solid phase discharge port of the slurry filter 16 is connected to the feed port of the squeeze dryer 20. Furthermore, the liquid phase discharge port of the slurry filter 16 is connected to the liquid phase delivery pump 17 and the evaporation crystallizer 18 through a three-way valve; when the organic matter content in the liquid phase discharged from the slurry filter 16 is less than 5000 mg / L, the liquid phase is delivered to the wet ball mill 3 through the liquid phase delivery pump 17; when the organic matter content in the liquid phase discharged from the filter 16 is ≥5000 mg / L, the liquid phase is delivered to the evaporation crystallizer 18, and the discharge port of the evaporation crystallizer 18 is connected to the organic waste salt pyrolysis furnace 19.

[0027] The MVR evaporation crystallizer 26 includes a crystallization condensate outlet, which is connected to a condensate delivery pump 27, which is connected to the liquid inlet of the salt dissolving tank 21, and the condensate delivery pump 27 returns the condensate of the MVR evaporation crystallizer 26 to the salt dissolving tank 21 for preparing the salt dissolving solution. The flocculation filter tank 23 is connected to a flocculant feeder 28, the oxidation filter tank 24 is connected to an oxidant feeder 29, and the adsorption filter tank 25 is connected to an adsorbent feeder 30. The ammonium waste salt resource utilization mechanism also includes a filter residue pyrolysis furnace 31 and an incinerator 32. The salt dissolving solution filter 22, the flocculation filter tank 23, and the oxidation filter tank 24 are all connected to the filter residue pyrolysis furnace 31, and the adsorption filter tank 25 is connected to the incinerator 32. In fact, the salt solution filter 22 includes a salt solution outlet and a filter residue outlet, the flocculation filter tank 23 includes a feed port, a filtrate outlet and a sediment outlet, the oxidation filter tank 24 includes an inlet, a filtrate outlet and a scum outlet, the adsorption filter tank 25 includes a feed port, a filtrate outlet and an adsorbent outlet, the salt solution outlet of the salt solution filter 22 and the flocculant feeder 28 are respectively connected to the feed port of the flocculation filter tank 23, and the filtrate outlet and the oxidant feeder 28 of the flocculation filter tank 23 are respectively connected to the feed port of the flocculation filter tank 23. The filter 29 is connected to the inlet of the oxidation filter tank 24, the filtrate outlet of the oxidation filter tank 24 and the adsorbent feeder 30 are connected to the feed port of the adsorption filter tank 25, the residue outlet of the salt solution filter 22, the sediment outlet of the flocculation filter tank 23, and the scum outlet of the oxidation filter tank 24 are connected to the residue pyrolysis furnace 31, the filtrate outlet of the adsorption filter tank 25 is connected to the MVR evaporation crystallizer 26, and the adsorbent outlet of the adsorption filter tank 25 is connected to the incinerator 32. The solid phase discharged from the slurry filter 16 is made into a salt solution through the salt dissolving tank 21, and then the impurities are removed by flocculation, oxidation, adsorption and decolorization treatment to obtain the product salt.

[0028] like Figure 2-Figure 4As shown, the dissolving tank includes a rotatable spherical tank body 211 and a stirring mechanism arranged in the tank body 211, the stirring mechanism can rotate circumferentially on the vertical plane and can rotate circumferentially on the horizontal plane along with the tank body 211; the stirring mechanism includes an annular connecting ring 212, a stirring paddle 213 fixedly mounted on the inner wall of the connecting ring 212, and a circle of ball pieces 214 arranged on the outer circle of the connecting ring 212, the ball pieces 214 include first balls 2141 distributed in a circle and second balls 2142 distributed in a circle, the first balls 2141 in a circle are distributed at intervals, each of the first balls 2141 is movably connected to the connecting ring 212 through a second universal ball 2146, and the second balls 2142 include a pair of symmetrically distributed grooves 2143. Except for a pair of adjacent first balls 2141, a second ball 2142 is movably embedded between the remaining two adjacent first balls 2141, the first balls 2141 are partially inserted into the groove 2143 and the outer surface of the second ball 2142 and the groove wall of the groove 2143 form a channel, and a circle of round balls 2111 is provided on the inner wall of the tank body 211, each of the round balls 2111 is connected to the inner wall of the tank body 211 through a first universal ball 2112, and a circle of the round balls 2111 is slidably abutted against a circle of ball parts 214.

[0029] The groove 2143 includes a spherical arc-shaped A groove 2144 and a circumferentially distributed B groove 2145 formed by the groove edge of the A groove 2144 . The B groove 2145 is connected to the A groove 2144 . The first ball 2141 is pressed into the A groove 2144 and slidably abuts against the groove edge of the A groove 2144 .

[0030] The tank body 211 is driven to rotate by the first motor 215, one end of the connecting ring 212 is connected to a connecting shaft 216 that passes through the tank body 211, and the outer end of the connecting shaft 216 is connected to a second motor 217. The first motor 7 drives the connecting ring 212, the stirring paddle 213, and the ball piece 214 to rotate through the connecting shaft 216.

[0031] When the solid phase separated in step 4 is added to the dissolution tank and dissolved in water, the tank body 211 rotates on the vertical plane, and drives the connecting ring 212, the stirring paddle 213, and the ball piece 214 to rotate on the vertical plane to stir the material; at the same time, the connecting ring 212, the stirring paddle 213, and the ball piece 214 are driven by the second motor 217 to rotate on the horizontal plane to stir the material. During the rotation of the ball piece 214, part of the solid phase will be ground by passing between the first ball 2141 and the second ball 2142, and sliding friction occurs between the first ball 2141 and the round ball 2111, and between the second ball 2142 and the round ball 2111 during rotation, which can grind the solid phase. That is to say, the first ball 2141, the second ball 2142, and the round ball 2111 can play the role of stirring blades while also playing the role of grinding, which can make the solid phase dissolve more quickly and fully, and improve the yield and purity of industrial regenerated salt.

[0032] The ammonium-containing waste salt resource treatment device of the utility model can convert the ammonium in the ammonium-containing industrial waste salt into ammonia water for reuse, and can make the remaining inorganic waste salt into product salt, thereby realizing the resource treatment of ammonium-containing waste salt. Taking the treatment of ammonium-containing waste salt containing ammonium chloride and sodium chloride as an example, the specific method is as follows:

[0033] Step 1: Add waste salt containing ammonium chloride and sodium chloride (sodium chloride content 78wt%, ammonium chloride content 9.8wt%, organic matter content 5.9wt%) into shredder 2 through waste salt feeder 1, and crush it into waste salt particles with a diameter of ≤25mm through shredder 2; feed the waste salt particles solid at a feed rate of 1t / h and process water at a feed rate of 2t / h into wet ball mill 3 (process water is pumped in through process water pump 4), grind at room temperature for 30min to make slurry, control the particle size of the discharge port to 200 mesh, and measure the ammonium ion concentration of the slurry to be 18.6g / L at this time.

[0034] Step 2: The slurry obtained in step 1 is transported to the acid adjustment kettle 5, and hydrochloric acid is added to the acid adjustment kettle 5 through the acidifier 6 to adjust the pH of the slurry to 2, and then the slurry is pumped into the acid stripping tower 7 for stripping (the stripping temperature is set to 80°C, air is used for stripping, the stripping gas volume is set to 5 times the volume of the slurry, and the stripping time is set to 20min), and the stripped slurry and stripped gas are obtained. The stripped gas is input into the condenser 8, condensed and cooled at 10°C, and volatile organic waste liquid and condensed tail gas are generated. The volatile organic waste liquid is sent to the waste liquid incinerator 9 for incineration, and the condensed tail gas is treated by the VOC treatment system 10 and then discharged.

[0035] Step 3: The stripped slurry obtained in step 2 is sent to the alkali adjustment kettle 11, and 30wt% sodium hydroxide solution is added through the alkali adder 12 to adjust the pH of the slurry to 13, and then the slurry is pumped into the alkaline stripping tower 13 for stripping (the stripping temperature is set to 80°C, air is used for stripping, the stripping gas volume is set to 20 times the liquid volume, and the stripping time is set to 3h), and the stripped slurry (pH is reduced to 11) and the stripped gas are obtained. The stripped gas is absorbed by the ammonia absorption tower 14 to produce industrial ammonia products, and the tail gas is washed with acid in the tail gas acid washing tower 15 and then discharged.

[0036] Step 4: The stripped slurry obtained in step 3 is input into the slurry filter 16 for filtration to separate the liquid phase and the solid phase (at this time, the residual ammonium ion in the liquid phase is 66 mg / L, the residual ammonium ion in the solid phase is 3.2 mg / g, and the organic matter content in the liquid phase is <5000 mg / L), and the liquid phase is returned to the wet ball mill 3 through the liquid phase delivery pump 17 to be slurried together with process water and ammonium-containing waste salt. The solid phase (mainly sodium chloride) is squeezed out by a squeeze dryer 20 and then sent to a salt dissolving tank 21, where water is added to dissolve it. Insoluble matter and scum are filtered out through a salt dissolving filter 22 to obtain a sodium chloride salt dissolving solution with a concentration of 15wt%; the sodium chloride salt dissolving solution is input into a flocculation filter tank 23, and a 1wt% PAM solution and a 1mol / L NaOH solution are added through a flocculant feeder 28, and the flocculants are filtered out after being fully stirred; the salt dissolving solution obtained after filtering the flocculants is sent to an oxidation filter tank 24, and a 4wt% NaClO solution and a 1mol / L HCl solution (the amount of oxidant added is 0.5% of the mass of salt in the dissolved salt solution to be purified), fully stirred and filtered to remove the scum; then the obtained dissolved salt solution is sent to the adsorption filter tank 25, and powdered activated carbon is added through the adsorbent feeder 30, and the activated carbon is filtered after fully stirring, and repeated three times for three-stage adsorption decolorization (the amount of adsorbent added for adsorption decolorization is 1% of the total mass of the dissolved salt solution). After decolorization, the dissolved salt solution is pumped into the MVR evaporation crystallizer 26 for evaporation and crystallization to obtain sodium chloride industrial regeneration salt. The crystallization condensed water is returned to the dissolved salt tank 21 through the condensed water delivery pump 27 for dissolving the next batch of solid phase. In this step, the amount ratio of the sodium chloride dissolved salt solution prepared by solid phase dissolution to the added PAM solution, NaOH solution, NaClO solution, HCl solution, and activated carbon is 1t:1L:1L:1L:2L:1kg.

[0037] According to the above method, the liquid phase with an organic content of less than 5000 mg / L separated in the initial step 4 is reused several times, and the organic content in the separated liquid phase is ≥5000 mg / L. At this time, the liquid phase is sent to the evaporation crystallizer 18 for evaporation and crystallization. The obtained organic waste salt (including sodium chloride) is vacuum dehydrated and then enters the organic waste salt pyrolysis furnace 19 for pyrolysis reduction. The remaining residue after pyrolysis is treated as self-produced hazardous waste and transported to a landfill for treatment.

[0038] During the treatment of ammonium-containing waste salt, the filter residues (main components of the filter residues are insoluble organic matter and impurity residues) from the solid phase dissolution filtration, flocculation filtration, and oxidation decolorization filtration in step 4 are collected, and after vacuum dehydration, the filter residues are sent to the organic waste salt pyrolysis furnace 19 for pyrolysis reduction. The residues remaining after pyrolysis are treated as self-produced hazardous waste and transported to a landfill for treatment. The waste activated carbon after adsorption and decolorization is collected, and after centrifugal dehydration, the waste activated carbon is sent to the incinerator 32 for incineration and waste heat recovery. The residues remaining after incineration are treated as self-produced hazardous waste and transported to a landfill for treatment.

[0039] The above method is used to treat industrial ammonium-containing waste salt containing ammonium chloride, sodium chloride and organic matter. Each ton of industrial ammonium-containing waste salt can produce 766.51kg of sodium chloride industrial regenerated salt and 152kg of industrial ammonia water with a concentration of 20wt%; the sodium chloride content in the obtained regenerated finished salt is 99.2wt%, which meets the requirements of the group standard T / CTES 1049-2022; the obtained industrial ammonia water content is 20.3wt%, and its evaporation residue is 0.17wt%, which meets the requirements of the industry standard HG / T 5353-2018. This embodiment successfully achieves the harmlessness, reduction and resource utilization of ammonium-containing waste salt.

[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waste ammonium salt resource processing device, comprising a pulping mechanism, a volatile impurity stripping mechanism, an ammonia stripping and absorption mechanism, and an ammonium removal waste salt resource processing mechanism, Features: The pulping mechanism comprises a wet ball mill (3), a shredder (2) connected to one feed port of the wet ball mill (3), and a process water pump (4) connected to another feed port of the wet ball mill (3); the volatile impurity stripping mechanism comprises an acid regulating kettle (5), an acid stripping tower (7) connected to the discharge port of the acid regulating kettle (5), and a condenser (8) connected to the gas discharge port of the acid stripping tower (7), wherein the feed port of the acid regulating kettle (5) is connected to the discharge port of the wet ball mill (3); the ammonia stripping and absorption mechanism comprises an alkali regulating kettle (11), an alkaline stripping tower (13) connected to the discharge port of the alkali regulating kettle (11), and an ammonia absorption tower (14) connected to the gas discharge port of the alkaline stripping tower (13), wherein the feed port of the alkali regulating kettle (11) is connected to the liquid discharge port of the acid stripping tower (7); the ammonium waste salt removal and resource utilization mechanism comprises The invention comprises a slurry filter (16), a liquid phase delivery pump (17), an evaporation crystallizer (18), and a squeeze dryer (20), a salt dissolving tank (21), a salt solution filter (22), a flocculation filter tank (23), an oxidation filter tank (24), an adsorption filter tank (25), and an MVR evaporation crystallizer (26) connected in sequence. The slurry filter (16) comprises a slurry feed port, a liquid phase discharge port, and a solid phase discharge port. The slurry feed port of the slurry filter (16) is connected to the liquid discharge port of the alkaline stripping tower (13). The liquid phase discharge port of the slurry filter (16) is respectively connected to the liquid phase delivery pump (17) and the evaporation crystallizer (18). The liquid outlet of the liquid phase delivery pump (17) is connected to another feed port of the wet ball mill (3). The solid phase discharge port of the slurry filter (16) is connected to the feed port of the squeeze dryer (20).

2. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The feed port of the shredder (2) is connected to a waste salt feeder (1).

3. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The acid regulating kettle (5) is connected to an acid adding device (6).

4. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The condenser (8) comprises a tail gas discharge port and a waste liquid discharge port, the waste liquid discharge port of the condenser (8) is connected to the waste liquid incinerator (9), and the tail gas discharge port of the condenser (8) is connected to the VOC treatment system (10).

5. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The alkali adjusting kettle (11) is connected to an alkali adding device (12).

6. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The ammonia absorption tower (14) comprises a tail gas outlet, and the tail gas outlet of the ammonia absorption tower (14) is connected to a tail gas acid washing tower (15).

7. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The liquid phase discharge port of the slurry filter (16) is connected to a liquid phase delivery pump (17) and an evaporation crystallizer (18) via a three-way valve; when the organic matter content in the liquid phase discharged from the slurry filter (16) is less than 5000 mg / L, the liquid phase is delivered to a wet ball mill (3) via a liquid phase delivery pump (17); when the organic matter content in the liquid phase discharged from the filter (16) is greater than or equal to 5000 mg / L, the liquid phase is delivered to the evaporation crystallizer (18), and the discharge port of the evaporation crystallizer (18) is connected to an organic waste salt pyrolysis furnace (19).

8. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The MVR evaporation crystallizer (26) comprises a crystallization condensed water outlet, the crystallization condensed water outlet is connected to a condensed water delivery pump (27), and the condensed water delivery pump (27) is connected to a liquid inlet of a salt dissolving tank (21).

9. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The flocculation filtration tank (23) is connected to a flocculant feeder (28), the oxidation filtration tank (24) is connected to an oxidant feeder (29), and the adsorption filtration tank (25) is connected to an adsorbent feeder (30).

10. A device for recycling ammonium-containing waste salt as claimed in claim 1, Features: The ammonium removal waste salt resource recovery mechanism further comprises a filter residue pyrolysis furnace (31) and an incinerator (32); the salt solution filter (22), the flocculation filter pool (23), and the oxidation filter pool (24) are all connected to the filter residue pyrolysis furnace (31); and the adsorption filter pool (25) is connected to the incinerator (32).

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