Evaporative crystallization device for phosphorus chemical mother liquor

Abstract

The utility model relates to the technical field of phosphorus chemical mother liquor, in particular to an evaporative crystallization device for phosphorus chemical mother liquor, which comprises a reaction cylinder, a stirring mechanism and a condensing mechanism, the stirring mechanism is used for stirring the inside of the reaction cylinder, and a heater is arranged on the reaction cylinder; the condensing mechanism comprises a condenser and a collecting box, the bottom of the condenser is communicated with the collecting box, the top of the condenser is communicated with an air guide pipe, a filtering mechanism is arranged between the air guide pipe and the reaction cylinder, and the filtering mechanism comprises an air inlet pipe, a mounting pipe and a filtering net; the gas inlet pipe is fixedly arranged on the peripheral wall of the reaction cylinder and communicated with the interior of the reaction cylinder, a sealing ring is arranged on the peripheral wall of the mounting pipe, the inner wall of the gas inlet pipe is in threaded connection with the peripheral wall of the mounting pipe, one end of the gas inlet pipe is arranged in the sealing ring, and a sealing ring is arranged at the bottom of the sealing ring; and the filter screen is arranged in the air inlet pipe. In the evaporative crystallization process, poisonous gas and impurities in steam can be filtered out, and the safety and reliability of condensation are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphorus chemical mother liquor, in particular to an evaporation and crystallization device for phosphorus chemical mother liquor. Background Art

[0002] Phosphorus chemical mother liquor usually contains high concentrations of phosphorus compounds, salts, organic matter and other solutes. These solutes are by-products in the phosphorus chemical production process. If not properly handled, they may cause resource waste and environmental pollution. In the phosphorus chemical production process, mother liquor evaporation and crystallization is a key step, and its treatment effect directly affects the quality of the product and environmental protection requirements.

[0003] During the evaporation and crystallization process of phosphorus chemical mother liquor, the steam produced may contain toxic gases and impurities. If these substances are discharged directly without treatment, they will have serious impacts on the environment and human health.

[0004] At the same time, during the operation of traditional evaporation and crystallization equipment, gas leakage is prone to occur due to poor sealing or equipment aging, which may pose a threat to the safety of operators. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes an evaporation crystallization device for phosphorus chemical mother liquor, which can effectively filter out toxic gases and impurities in steam, improve the safety of condensation, and prevent gas leakage, thereby improving the safety and reliability of the equipment.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, a device for evaporation and crystallization of mother liquor in phosphorus chemical industry is proposed, comprising a reaction tube, a stirring mechanism, a collecting mechanism and a condensing mechanism, wherein the stirring mechanism is used to stir the inside of the reaction tube, and the collecting mechanism is arranged at the bottom of the reaction tube for collecting crystals; a heater is arranged on the outer peripheral wall of the bottom of the reaction tube, and the heater heats the reaction tube; the condensing mechanism comprises a condenser and a collecting box, the bottom of the condenser is communicated with the collecting box, and the top of the condenser is communicated with an air guide pipe, and a filtering mechanism is arranged between the air guide pipe and the reaction tube, and the filtering mechanism comprises an air inlet pipe, a mounting pipe and a filter screen; the air inlet pipe is fixedly arranged on the outer peripheral wall of the reaction tube and is communicated with the inside of the reaction tube, a sealing ring is arranged on the outer peripheral wall of the mounting pipe, the inner wall of the air inlet pipe is threadedly connected to the outer peripheral wall of the mounting pipe, one end of the air inlet pipe is arranged in the sealing ring, and a sealing ring is arranged at the bottom of the sealing ring; the filter screen is arranged inside the air inlet pipe, and abuts against the filter screen with one end of the mounting pipe.

[0007] As a further solution of the utility model: the side wall of the mounting tube is provided with a positioning assembly, and the positioning assembly includes a positioning ring, a telescopic block and a spring. The side wall of the mounting tube is provided with a telescopic groove, one end of the spring is arranged at the bottom of the telescopic groove, and the other end is connected to the telescopic block, the telescopic block is connected to the positioning ring, and the positioning ring is used to abut against the side wall of the filter net.

[0008] As a further solution of the utility model: a one-way valve is arranged between the air guide pipe and the installation pipe.

[0009] As a further solution of the utility model: the stirring mechanism includes a power device, a stirring shaft and a scraper; the power device is arranged on the top of the reaction tube, and the output end of the power device is connected to the stirring shaft, the scraper is arranged on the stirring shaft, and the side wall of the scraper is provided with a plurality of bristles, and the bristles are connected to the inner wall of the reaction tube.

[0010] As a further solution of the utility model: the collection mechanism includes a recovery box and a delivery pump, the recovery box is connected to the bottom of the reaction cylinder, a sieve plate is arranged inside the recovery box, a flow pipe is arranged at the bottom of the recovery box, the flow pipe is connected to one end of the delivery pump, and a connecting pipe is arranged at the other end of the delivery pump, and the connecting pipe is connected to the inside of the reaction cylinder.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model can effectively filter out toxic gases and impurities in steam through the structure of the air intake pipe, the installation pipe and the filter screen, thereby improving the safety of condensation. At the same time, the air intake pipe is threadedly connected to the installation pipe, which facilitates the removal and replacement of the filter, thereby improving the filtering efficiency. The sealing ring and the sealing ring provided on the outer peripheral wall of the installation pipe cooperate with the installation of the installation pipe, thereby effectively preventing gas leakage and improving the safety and reliability of the equipment.

[0013] 2. The utility model can ensure that the filter can be stably installed inside the air intake pipe by setting a positioning component; when the filter is placed inside the air intake pipe, the positioning ring will move outward along the telescopic groove through the telescopic block under the push of the spring, so as to closely abut against the side wall of the filter. The displacement or shaking of the filter during the filtering process is effectively prevented, ensuring the stability and continuity of the filtering effect.

[0014] 3. The utility model ensures that gas or steam can only flow in a set direction by setting a one-way valve to prevent backflow.

[0015] 4. The utility model drives the stirring shaft to rotate through a power device, so that the mother liquor can be fully stirred and mixed in the reaction tube, thereby improving the efficiency of solute evaporation and crystallization. At the same time, the scraper and bristles can effectively scrape off the solute or crystals attached to the inner wall of the reaction tube when the stirring shaft rotates, thereby preventing crystals from accumulating on the inner wall of the reaction tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of a mother liquor evaporation and crystallization device used in phosphorus chemical industry.

[0017] Figure 2 It is an enlarged partial cross-sectional view of the filtering mechanism.

[0018] Figure 3 This is an enlarged partial cross-sectional view of the stirring mechanism.

[0019] The reference numerals in the figure are: 1. reaction cylinder; 11. heater; 2. condenser; 21. collection box; 22. air duct; 3. air inlet pipe; 31. filter screen; 4. mounting pipe; 41. sealing ring; 42. sealing ring; 43. telescopic groove; 5. positioning ring; 51. telescopic block; 52. spring; 6. one-way valve; 7. power unit; 71. stirring shaft; 72. scraper; 721. brush; 8. recovery box; 81. sieve plate; 82. delivery pump; 821. circulation pipe; 822. connecting pipe. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figures 1 to 3 As shown, a device for evaporation and crystallization of mother liquor in phosphorus chemical industry comprises a reaction tube 1, a stirring mechanism, a collecting mechanism and a condensing mechanism, wherein the stirring mechanism is used to stir the inside of the reaction tube 1, and the collecting mechanism is arranged at the bottom of the reaction tube 1 to collect crystals; a heater 11 is arranged on the outer peripheral wall of the bottom of the reaction tube 1, and the heater 11 heats the reaction tube 1;

[0022] The condensing mechanism includes a condenser 2 and a collecting box 21. The bottom of the condenser 2 is connected to the collecting box 21, and the top of the condenser 2 is connected to an air guide pipe 22. The steam generated by evaporation and crystallization is condensed and recovered by the condensing mechanism, which improves the recovery rate of the steam and reduces energy consumption and environmental pollution.

[0023] A filtering mechanism is arranged between the air guide pipe 22 and the reaction cylinder 1, and the filtering mechanism includes an air intake pipe 3, a mounting tube 4 and a filter screen 31; the air intake pipe 3 is fixedly arranged on the outer peripheral wall of the reaction cylinder 1 and is communicated with the interior of the reaction cylinder 1, a sealing ring 41 is arranged on the outer peripheral wall of the mounting tube 4, the inner wall of the air intake pipe 3 is threadedly connected with the outer peripheral wall of the mounting tube 4, one end of the air intake pipe 3 is arranged in the sealing ring 41, and a sealing ring 42 is arranged at the bottom of the sealing ring 41; the filter screen 31 is arranged in the air intake pipe 3, and abuts against the filter screen 31 with one end of the mounting tube 4.

[0024] Through the structure of the air intake pipe 3, the mounting pipe 4 and the filter 31, the toxic gas and impurities in the steam can be effectively filtered out, and the safety of condensation can be improved. At the same time, the air intake pipe 3 is threadedly connected with the mounting pipe 4, which facilitates the removal and replacement of the filter, and improves the filtering efficiency. The sealing ring 41 and the sealing ring 42 provided on the outer peripheral wall of the mounting pipe 4 cooperate with the installation of the pipe, effectively preventing gas leakage, and improving the safety and reliability of the equipment.

[0025] The side wall of the mounting tube 4 is provided with a positioning assembly, and the positioning assembly includes a positioning ring 5, a telescopic block 51 and a spring 52. The side wall of the mounting tube 4 is provided with a telescopic groove 43. One end of the spring 52 is arranged at the bottom of the telescopic groove 43, and the other end is connected to the telescopic block 51. The telescopic block 51 is connected to the positioning ring 5, and the positioning ring 5 is used to abut against the side wall of the filter screen 31.

[0026] The positioning assembly can ensure that the filter 31 can be stably installed inside the air intake pipe 3. When the filter 31 is placed inside the air intake pipe 3, the positioning ring 5 will move outward along the telescopic groove 43 through the telescopic block 51 under the push of the spring 52, so as to closely abut against the side wall of the filter 31. The displacement or shaking of the filter 31 during the filtering process is effectively prevented, and the stability and continuity of the filtering effect are ensured.

[0027] A one-way valve 6 is provided between the air guide pipe 22 and the mounting pipe 4 .

[0028] The one-way valve 6 is provided to ensure that the gas or steam can only flow in the set direction to prevent backflow.

[0029] The stirring mechanism includes a power device 7, a stirring shaft 71 and a scraper 72; the power device 7 is arranged on the top of the reaction tube 1, and the output end of the power device 7 is connected to the stirring shaft 71, the scraper 72 is arranged on the stirring shaft 71, and the side wall of the scraper 72 is provided with a plurality of bristles 721, and the bristles 721 are connected to the inner wall of the reaction tube 1.

[0030] The stirring shaft 71 is driven to rotate by the power device 7, so that the mother liquor can be fully stirred and mixed in the reaction tube 1, thereby improving the efficiency of solute evaporation and crystallization. At the same time, the scraper 72 and the bristles 721 can effectively scrape off the solute or crystals attached to the inner wall of the reaction tube 1 when the stirring shaft 71 rotates, thereby preventing crystals from accumulating on the inner wall of the reaction tube 1.

[0031] The collecting mechanism includes a recovery box 8 and a delivery pump 82. The recovery box 8 is connected to the bottom of the reaction tube 1. A sieve plate 81 is arranged inside the recovery box 8. A flow pipe 821 is arranged at the bottom of the recovery box 8. The flow pipe 821 is connected to one end of the delivery pump 82. The other end of the delivery pump 82 is provided with a connecting pipe 822. The connecting pipe 822 is connected to the inside of the reaction tube 1.

[0032] The sieve plate 81 can be provided to achieve solid-liquid separation, and the unevaporated mother liquor returns to the reaction cylinder 1 through the circulation pipe 821, the delivery pump 82 and the connecting pipe 822 for evaporation and crystallization, thereby improving the recycling of the mother liquor, reducing waste and improving work efficiency.

[0033] The working principle of the utility model is as follows: first, the reaction tube 1 is heated by the heater 11, the power device 7 is started, and the stirring shaft 71 and the scraper 72 are driven to fully stir the mother liquid in the reaction tube 1. At the same time, the scraper 72 and the bristles 721 can scrape off the solute or crystals attached to the inner wall of the reaction tube 1 to prevent their accumulation.

[0034] The steam generated during the evaporation and crystallization process enters the condensation mechanism through the air guide pipe 22. The condenser 2 condenses the steam, converts it into liquid, and collects it through the collection box 21. Before the steam enters the condenser 2, it first passes through the filtering mechanism. Through the structure of the air inlet pipe 3, the mounting pipe 4 and the filter screen 31, the toxic gas and impurities in the steam can be effectively filtered out to improve the safety of condensation. At the same time, the air inlet pipe 3 is threadedly connected to the mounting pipe 4, which facilitates the disassembly and replacement of the filter, improves the filtering efficiency, and the sealing ring 41 and the sealing ring 42 set on the outer peripheral wall of the mounting pipe 4 cooperate with the installation of the pipe to effectively prevent gas leakage.

[0035] The mother liquor after evaporation and crystallization enters the sieve plate 81 in the recovery box 8 to achieve solid-liquid separation, and the unevaporated mother liquor returns to the reaction cylinder 1 through the circulation pipe 821, the delivery pump 82 and the connecting pipe 822 to be evaporated and crystallized again, thereby realizing the recycling of the mother liquor and reducing waste.

[0036] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A device for evaporating and crystallizing mother liquor in phosphorus chemical industry, comprising a reaction tube (1), a stirring mechanism, a collecting mechanism and a condensing mechanism, wherein the stirring mechanism is used to stir the interior of the reaction tube (1), and the collecting mechanism is arranged at the bottom of the reaction tube (1) and is used to collect crystals; a heater (11) is arranged on the outer peripheral wall of the bottom of the reaction tube (1), and the heater (11) heats the reaction tube (1); It is characterized in that The condensing mechanism comprises a condenser (2) and a collecting box (21); the bottom of the condenser (2) is in communication with the collecting box (21); the top of the condenser (2) is in communication with an air guide pipe (22); a filtering mechanism is provided between the air guide pipe (22) and the reaction cylinder (1); the filtering mechanism comprises an air intake pipe (3), a mounting pipe (4) and a filter screen (31); the air intake pipe (3) is fixedly arranged on the outer peripheral wall of the reaction cylinder (1) and is in communication with the interior of the reaction cylinder (1); a sealing ring (41) is provided on the outer peripheral wall of the mounting pipe (4); the inner wall of the air intake pipe (3) is threadedly connected to the outer peripheral wall of the mounting pipe (4); one end of the air intake pipe (3) is arranged in the sealing ring (41); and a sealing ring (42) is provided at the bottom of the sealing ring (41); The filter screen (31) is arranged inside the air intake pipe (3), and one end of the mounting pipe (4) abuts against the filter screen (31); The side wall of the mounting tube (4) is provided with a positioning assembly, the positioning assembly comprising a positioning ring (5), a telescopic block (51) and a spring (52); the side wall of the mounting tube (4) is provided with a telescopic groove (43); one end of the spring (52) is arranged at the bottom of the telescopic groove (43), and the other end is connected to the telescopic block (51); the telescopic block (51) is connected to the positioning ring (5); and the positioning ring (5) is used to abut against the side wall of the filter screen (31).

2. The evaporation and crystallization device for phosphorus chemical mother liquor according to claim 1, characterized in that: A one-way valve (6) is provided between the air guide pipe (22) and the mounting pipe (4).

3. The evaporation and crystallization device for phosphorus chemical mother liquor according to claim 1, characterized in that: The stirring mechanism comprises a power device (7), a stirring shaft (71) and a scraper (72); the power device (7) is arranged at the top of the reaction tube (1), and the output end of the power device (7) is connected to the stirring shaft (71); the scraper (72) is arranged on the stirring shaft (71), and a plurality of bristles (721) are arranged on the side wall of the scraper (72), and the bristles (721) are connected to the inner wall of the reaction tube (1).

4. The evaporation and crystallization device for phosphorus chemical mother liquor according to claim 1, characterized in that: The collecting mechanism comprises a recovery box (8) and a delivery pump (82); the recovery box (8) is connected to the bottom of the reaction tube (1); a sieve plate (81) is arranged inside the recovery box (8); a flow pipe (821) is arranged at the bottom of the recovery box (8); the flow pipe (821) is connected to one end of the delivery pump (82); the other end of the delivery pump (82) is provided with a connecting pipe (822); the connecting pipe (822) is connected to the inside of the reaction tube (1).

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