CN216986678U

CN216986678U - Waste urea and urea dust recovery device

Info

Publication number: CN216986678U
Application number: CN202122760917.XU
Authority: CN
Inventors: 韩锋利; 周祖兵; 李江波
Original assignee: Shanxi Jinxiang Coal Chemical Co ltd
Current assignee: Shanxi Jinxiang Coal Chemical Co ltd
Priority date: 2021-11-12
Filing date: 2021-11-12
Publication date: 2022-07-19
Anticipated expiration: 2031-11-12

Abstract

The utility model discloses a waste urea and urea dust recovery device, which relates to the technical field of urea production and comprises a waste urea solution storage tank, wherein a top cover is additionally arranged on a notch of the waste urea solution storage tank, a feeding filter cylinder extending into the notch is arranged on the top cover, a condensing tube is arranged above the waste urea solution storage tank, a branch hose is arranged on the condensing tube, and the free end of the branch hose is used for washing the feeding filter cylinder; a waste urea recovery pump is arranged beside the waste urea solution storage tank, the inlet of the waste urea recovery pump is connected with a liquid suction pipe, and the liquid suction pipe penetrates through the top cover and extends into the bottom of the waste urea solution storage tank; the outlet of the waste urea recovery pump is connected with the urea tank through a liquid discharge pipe. The utility model processes unqualified products generated in the processes of landing fertilizer, production, storage, transportation, loading and unloading for recycling through less investment and convenient transformation, realizes the increase of the yield of urea, has low power consumption, is convenient and efficient, avoids dust diffusion, and has great significance for recycling waste urea and dust.

Description

Waste urea and urea dust recovery device

Technical Field

The utility model relates to the technical field of urea production, in particular to a waste urea and urea dust recovery device.

Background

In the process of urea production, because of the influence of factors such as device load, air temperature, air humidity and the like, a granulation nozzle needs to be changed every half month in summer by a urea granulation nozzle in operation, the granulation nozzle needs to be changed every twenty days in winter, unqualified products of 2-4t can be produced when the granulation nozzle is changed every time, and the nozzle is changed under an abnormal state, about 100t unqualified products can be produced every year, and in the process of urea loading and storage, about 50t defective products can be produced when the urea is stored in a rainy season or loading bag breaking due to the characteristic that the urea is very easy to absorb moisture and absorb moisture, and more defective products can be produced in severe weather which is extremely frequent. The finished urea products can generate the fertilizer falling to the ground in the bagging process due to equipment failure or manual operation, the fertilizer falling to the ground can be generated by about 100t every year according to about two bags per shift, the pan bottom of a granulation tower, a packaging discharging pipe, a silo wall and the like can be caked under the influence of air humidity and dust, and the finished urea products need to be cleaned regularly; therefore, waste urea and urea dust are generated to different degrees in the production process of production operation and urea storage, the fertilizer has a large price difference compared with a genuine product in the sales process, the sales income of a company is influenced, the waste urea and the urea dust cannot be effectively recycled and can only be used as a ground fertilizer and an unqualified product to be treated to cause waste, the urea consumption and the production cost are increased, in the recycling process, a closed treatment and recycling mode is not available, a large amount of flying dust is generated, the environment is harmed, the environmental protection pressure is increased, the difficulty in the sanitary cleaning work of workers is increased, the risk of suffering from pneumoconiosis is increased, and the personal health is harmed; dust diffusion still can cause whole package system equipment lubrication difficulty, the vulnerable part in the equipment increases, the fault rate increase, seriously reduce the life of equipment, increase maintainer maintenance equipment degree of difficulty and maintenance cost, the dust can not effectively be retrieved and is adulterated in the finished product granule, greatly reduced finished product quality, influence enterprise product market competitiveness, in order to solve above-mentioned problem, need improve current useless urea and urea dust recovery unit.

Disclosure of Invention

The utility model provides a waste urea and urea dust recovery device, which aims to solve a series of outstanding problems of waste caused by the incapability of recovering waste urea and urea dust, environmental pollution, harm to workers, equipment loss, high failure rate and the like.

The utility model is realized by adopting the following technology: a waste urea and urea dust recovery device comprises a waste urea solution storage tank, wherein a top cover is additionally arranged on a notch of the waste urea solution storage tank, a feeding filter cylinder extending into the tank is installed on the top cover, a condensing tube is arranged above the waste urea solution storage tank, a branch hose is arranged on the condensing tube, and the free end of the branch hose is used for washing the feeding filter cylinder; a waste urea recovery pump is arranged beside the waste urea solution storage tank, the inlet of the waste urea recovery pump is connected with a liquid suction pipe, and the liquid suction pipe penetrates through the top cover and extends into the bottom of the waste urea solution storage tank; the outlet of the waste urea recovery pump is connected with the urea tank through a liquid discharge pipe.

When the device is used, the groove body of the waste urea solution storage tank is arranged below the ground between the ammonia water groove and the urine groove of the first floor of the main frame of the urea production device, the top of the groove is higher than the ground, the radar liquid level meter is arranged in the groove, the lower end of the radar liquid level meter extends into the bottom of the groove, and the display device of the radar liquid level meter leaks out of the groove body so as to judge the liquid level height in the waste urea solution storage tank; the top cover is additionally arranged on a notch of the waste urea solution storage tank, so that the pollution of waste urea and dust to air can be effectively prevented, the temperature in the tank can be ensured, the urea can be prevented from crystallizing, the feeding filter cylinder extending into the tank is arranged on the top cover, the fallen fertilizer, the packaged dust, the unqualified product, the granulation tower, the pot bottom caking and the packaging bin caking are collected in a unified way, after dirt cleaning and coarse screening is roughly carried out manually, the feeding filter cylinder is added, large granular impurities are filtered by the feeding filter cylinder, and the large granular impurities are screened into a tank body of the waste urea solution storage tank; a condensate pipe is arranged above a waste urea solution storage tank, steam condensate is a byproduct medium produced by a urea device, an original pipeline is connected without adding a new liquid source during transformation, the effect of recycling can be achieved, the stable operation of an environment-friendly device is realized, the power consumption of the whole recovery device is low, a branch hose is arranged on the condensate pipe, a valve IV is arranged on the branch hose, the free end of the branch hose is used for flushing a feeding filter cartridge, the opening and closing of the control valve IV can be controlled, liquid can be controlled to be injected into the feeding filter cartridge through the branch hose, the position and the angle of the free end of the branch hose are operated and moved, the flushing direction is adjusted, waste urea and urea dust adhered on the feeding filter cartridge are flushed, and lumps are flushed away, so that the waste urea and the urea dust are fully dissolved, the meshes of the feeding filter cartridge are prevented from being blocked, and a better filtering effect is realized, the waste urea solution storage tank, the waste urea recovery pump and the urine tank are sequentially connected in series through pipelines, the waste urea recovery pump is arranged beside the waste urea solution storage tank, the inlet of the waste urea recovery pump is connected with the liquid suction pipe, and the liquid suction pipe penetrates through the top cover and extends into the bottom of the waste urea solution storage tank; the liquid suction pipe is provided with a filter, the filter is provided with an exhaust valve, when the liquid suction pipe sucks the solution in the waste urea solution storage tank, the filter carries out secondary filtration on the waste urea and urea dust solution, the sucked gas is removed, the gas is prevented from entering the waste urea recovery pump, the outlet of the waste urea recovery pump is connected with the urea tank through a liquid discharge pipe, the liquid discharge pipe is provided with a valve VI, the recovery of products can be controlled according to the factors such as the concentration, the quality and the like of the solution, and the recovered solution is sent to the urea tank through the liquid discharge pipe; waste urea, urea dust and the like are washed by liquid in a branch hose, then filtered by a feeding filter cylinder, enter a waste urea solution storage tank, are pumped by a waste urea recovery pump, enter a pump by a liquid suction pipe and are discharged to a urine tank by a liquid discharge pipe to complete recovery, the outlet of the waste urea recovery pump is also connected with a return pipe, the return pipe extends into the waste urea solution storage tank, a valve V is arranged on the return pipe, when a product is not suitable for being directly led to the urine tank, a valve VI on the liquid discharge pipe is closed, a valve V on the return pipe is opened, the liquid is directly overflowed into the waste urea solution storage tank through the liquid return pipe, the condensate pipe is communicated with the outlet of the waste urea recovery pump, namely, the condensate pipe is connected with the return pipe, a valve II and a valve III are arranged on the condensate pipe, when the concentration of the solution in the pump is overhigh, the valve II and the valve III are opened, the condensate pipe is communicated with the return pipe to flush the pump, the solution in the tank can be diluted, and similarly, when the pump is empty, the waste urea recovery pump is subjected to pump filling treatment, gas in a pump shell and an impeller is removed, so that liquid can be smoothly sucked, and a waste analysis liquid pipe is arranged outside the condensed liquid pipe and is connected to a pipeline between the valve II and the valve III in parallel; the branch hose is connected to a pipeline between the valve II and the valve III, the valve I is installed on the analytic waste liquid pipe, the purity of the condensate is higher than that of the analytic waste liquid, the condensate pipe and the analytic waste liquid pipe are connected into the pipeline in parallel, the condensate pipe and the analytic waste liquid pipe can be selected according to the requirement on the purity, the liquid entering the backflow pipe and the branch hose can be selected by controlling the opening and closing of the valve I and the valve II, the steam condensate and the analytic waste liquid are both byproduct media produced by the urea device, the original pipeline is only connected into the device during the transformation, the effect of recycling can be achieved without increasing new liquid sources, the stable operation of the environmental protection device is realized, the power consumption of the whole recovery device is low, when the temperature is low in winter, the urea solution is easy to crystallize, a steam main pipe is arranged above the waste urea solution storage tank, the steam is byproduct steam in the urea production process, and the byproduct steam can be introduced during the transformation, need not to increase new steam source, reach the purpose of recycling, many steam branch pipes have been arranged on the steam main, all install the valve on steam main and the steam branch pipe, every steam branch pipe passes the top cap and stretches into in the useless urea solution storage tank, also can steam main directly access the inslot, let in low pressure steam and carry out the heat treatment to the urea solution of crystallization, treat that the solution temperature risees and retrieve again, enlarge the temperature application range of this device, so that use widely in the city in the north, the valve on control steam main and every steam branch pipe can realize heating useless urea solution storage tank different positions, so that whole useless urea solution storage tank is heated evenly.

Compared with the prior art, the utility model has the following beneficial effects: the waste urea and urea dust recovery device provided by the utility model can realize the increase of urea yield, simultaneously reduce consumption and increase enterprise income by conveniently modifying a product line through smaller modification investment and simple equipment which only adds a circulating recovery tank, a pump and a plurality of pipelines, and recycles waste which can only be treated as ground fertilizer and defective products originally, is not only suitable for arrangement and installation of a new factory, but also suitable for environment-friendly modification of old factory areas, and the steam, steam condensate and analytic waste liquid used in the device are all byproduct media produced by a urea device, thereby achieving the effect of recycling, effectively meeting the subsequent treatment work of recovering urea dust by the environment-friendly device, ensuring the stable operation of the environment-friendly device, having less power consumption of the whole recovery device, being convenient and efficient for manual operation, and recovering ground products by cleaning the ground products in the line, the method has the advantages that soil pollution is effectively avoided, the environment is protected, the working difficulty of workers is reduced, the lubricating difficulty of equipment caused by dust diffusion is avoided, faults are reduced, through calculation, the project investment is estimated to be only about 5 ten thousand yuan by comprehensively considering material, civil engineering and labor cost, 400 tons of relevant urea products except certified products are sold in an accumulative year according to statistics of sales departments in the past year, the mixing difference is 400 yuan, and the total amount is 16 ten thousand yuan; if the device is used for recycling and re-granulating, the consumption of electric power and the like is removed, the income can be increased by about 15 ten thousand yuan every year, and the device has the advantages of environmental protection and incapability of calculating the health of enterprise workers.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

The figures are labeled as follows: 1-waste urea solution storage tank, 2-feeding filter cartridge, 3-branch hose, 4-steam main pipe, 5-condensate pipe, 6-analysis waste liquid pipe, 7-waste urea recovery pump, 8-filter, 9-exhaust valve, 10-radar liquid level meter, 11-valve I, 12-valve II, 13-valve III, 14-valve IV, 15-pipette, 16-liquid discharge pipe, 17-return pipe, 18-top cover, 19-valve V, 20-valve VI, 21-steam branch pipe and 22-valve.

Detailed Description

The following describes an embodiment of the present invention with reference to the drawings.

A waste urea and urea dust recovery device comprises a waste urea solution storage tank 1, wherein a top cover 18 is additionally arranged on a notch of the waste urea solution storage tank 1, a feeding filter cylinder 2 extending into the notch is arranged on the top cover 18, a condensing liquid pipe 5 is arranged above the waste urea solution storage tank 1, a branch hose 3 is arranged on the condensing liquid pipe 5, and the free end of the branch hose 3 is used for washing the feeding filter cylinder 2; a waste urea recovery pump 7 is arranged beside the waste urea solution storage tank 1, the inlet of the waste urea recovery pump 7 is connected with a liquid suction pipe 15, and the liquid suction pipe 15 penetrates through a top cover 18 and extends into the bottom of the waste urea solution storage tank 1; the outlet of the waste urea recovery pump 7 is connected to a urine tank via a drain pipe 16.

The following examples are given by way of illustration.

A waste urea and urea dust recovery device is shown in figure 1: comprises a waste urea solution storage tank 1, a groove body of the waste urea solution storage tank 1 is arranged below the ground in the middle of an ammonia water groove and a urine groove of a first floor of a main frame of a urea production device, the top end of the waste urea solution storage tank 1 is higher than the ground, a top cover 18 is additionally arranged on a groove opening to prevent the waste urea and the urea dust from polluting the air, the top cover 18 is provided with a feeding opening, a feeding filter cylinder 2 extending into the groove is embedded in the top cover, the falling fertilizer, the packaged urea dust, unqualified products, caking at the bottom of a pan of a granulation tower and caking of a packaging material bin are collected in a unified way, after dirt cleaning and coarse screening are roughly manually, the waste urea solution storage tank is added from the feeding opening, the waste urea solution storage tank 1 is screened into the groove body through the feeding filter cylinder 2, a filter cylinder cover is arranged on the feeding filter cylinder 2, a filter cylinder cover is covered after feeding, a condensation liquid pipe 5 is arranged above the waste urea solution storage tank 1, a branch hose 3 is arranged on the condensation liquid pipe 5, a branch hose 3, a valve IV 14 is arranged on the branch hose 3, the length of the branch hose 3 is enough to extend into the feeding filter cylinder 2, the free end of the branch hose 3 is used for flushing the feeding filter cylinder 2, a control valve IV 14 is opened, liquid is injected into the feeding filter cylinder 2 through the branch hose 3, an operator operates and moves the position and the angle of the branch hose 3, adjusts the flushing direction, flushes the waste urea and the urea dust adhered on the feeding filter cylinder 2, flushes the caking, can fully dissolve the waste urea and the urea dust, prevents the bridging phenomenon in the meshes of the feeding filter cylinder 2, realizes better filtering effect, a waste urea recovery pump 7 is arranged beside the waste urea solution storage tank 1, in the embodiment, the waste urea recovery pump 7 is a self-sucking pump, an inlet of the waste urea recovery pump 7 is connected with a liquid sucking pipe 15, the liquid sucking pipe 15 penetrates through a top cover 18 and extends into the bottom of the waste urea solution storage tank 1, a filter 8 is arranged on the filter 15, and an exhaust valve 9 is arranged on the filter 8, when the liquid suction pipe 15 extracts the solution in the waste urea solution storage tank 1, the filter 8 carries out secondary filtration on the waste urea and urea dust solution, and exhausts the extracted gas through the exhaust valve 9, so as to prevent steam or other gases from entering the waste urea recovery pump 7, the outlet of the waste urea recovery pump 7 is connected with a urine tank through a liquid discharge pipe 16, a valve VI 20 is arranged on the liquid discharge pipe 16, the recovery of the product can be controlled according to the concentration and quality of the solution and other factors, and the recovered solution is sent to the urine tank through the liquid discharge pipe 16 to complete the recovery; the outlet of the waste urea recovery pump 7 is also connected with a return pipe 17, the return pipe 17 extends into the waste urea solution storage tank 1, a valve V19 is arranged on the return pipe 17, when the product is not suitable for being directly communicated to a urine tank, a valve VI 20 on a liquid discharge pipe 16 is closed, the valve V19 on the return pipe 17 is opened, the liquid directly overflows into the waste urea solution storage tank 1 through the return pipe 17, a condensed liquid pipe 5 is communicated with the outlet of the waste urea recovery pump 7, namely the condensed liquid pipe 5 is connected with the return pipe 17, when the concentration of the solution in the pump is too high, the pump cannot be normally pumped, the condensed liquid pipe 5 is communicated with the return pipe 17 to pump, the liquid after being pumped directly flows into the waste urea solution storage tank 1, a valve II 12 and a valve III 13 are arranged on the condensed liquid pipe 5, a waste liquid pipe 6 is arranged outside the condensed liquid pipe 5, the waste liquid analyzing pipe 6 is connected to a pipeline between the valve II 12 and the valve III 13 in parallel, the valve I11 is arranged on the analysis waste liquid pipe 6, the steam condensate and the analysis waste liquid are both byproduct media produced by a urea device, the effect of recycling can be achieved only by connecting an original pipeline into the device without adding a new liquid source during transformation, the stable operation of the environmental protection device is realized, the power consumption of the whole recovery device is low, the purity of the condensate is higher than that of the analysis waste liquid, the condensate pipe 5 and the analysis waste liquid pipe 6 are connected into the pipeline in parallel, the selection can be carried out according to the requirement on the purity, the solution concentration in the waste urea solution storage tank 1 and the waste urea recovery pump 7 is too high, the valve III 13 is opened, the liquid entering the waste urea solution storage tank 1 can be adjusted by controlling the opening and closing of the valve I11 and the valve II 12, the solution in the tank is diluted, the branch hose 3 is connected onto the pipeline between the valve II 12 and the valve III 13, under the condition of closing the valve III 13, the valve I11 and the valve II 12 are also matched with a valve IV 14 on the branch hose 3 to regulate the liquid entering the charging filter cylinder 2 through the branch hose 3; when the temperature is low in winter, the urea solution is easy to crystallize, a steam main pipe 4 is arranged above a waste urea solution storage tank 1, a valve 22 is arranged on the steam main pipe 4, steam in the pipeline is byproduct steam in the urea production process, the byproduct steam can be introduced during modification without adding a new steam source, a plurality of steam branch pipes 21 are arranged on the steam main pipe 4, each steam branch pipe 21 penetrates through a top cover 18 and extends into the waste urea solution storage tank 1, low-pressure steam is introduced to heat the crystallized urea solution, and the urea solution is recovered after the crystallization is dissolved and the temperature of the solution is raised, in the embodiment, the steam main pipe 4 is divided into two steam branch pipes 21 which are connected into the waste urea solution storage tank 1 to the bottom of the tank, or can be divided into a plurality of steam branch pipes 21 or the steam main pipe 4 which are directly connected into the tank, and the urea solution storage tank 1 can be adjusted according to the local temperature and the depth and the diameter of the waste urea solution storage tank 1, open steam main 4 valve, through opening and shutting of valve 22 on controlling two steam branch pipes 21, adjust the flow direction of low pressure steam, the flow, can realize heating useless urea solution storage tank 1 different positions, so as to realize that whole useless urea solution storage tank 1 is heated evenly, 1 inslot fixed mounting of useless urea solution storage tank has radar level gauge 10, radar level gauge 10 lower extreme is deep into the tank bottom, radar level gauge 10 display device leaks outside the cell body so that observe the liquid level reading, in addition radar level gauge still uploads data to the DCS system, observe the liquid level by supervision tray personnel in step, prevent that the scene from melting urea personnel because do not observe the liquid level in time, lead to the solution to flow out and cause ground pollution and personnel to be injured, survey useless urea recovery tank liquid level and reach about 80% full groove, start useless urea recovery pump 7 and send the liquid to the urine groove.

The scope of the utility model is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents within the spirit and principle of the utility model should be included in the scope of the utility model.

Claims

1. The utility model provides a useless urea and urea dust recovery unit which characterized in that: the device comprises a waste urea solution storage tank (1), wherein a top cover (18) is additionally arranged on a notch of the waste urea solution storage tank (1), a feeding filter cylinder (2) extending into a tank is installed on the top cover (18), a condensate pipe (5) is arranged above the waste urea solution storage tank (1), a branch hose (3) is arranged on the condensate pipe (5), and the free end of the branch hose (3) is used for flushing the feeding filter cylinder (2); a waste urea recovery pump (7) is arranged beside the waste urea solution storage tank (1), an inlet of the waste urea recovery pump (7) is connected with a liquid suction pipe (15), and the liquid suction pipe (15) penetrates through a top cover (18) and extends into the bottom of the waste urea solution storage tank (1); the outlet of the waste urea recovery pump (7) is connected with a urine tank through a liquid discharge pipe (16).

2. The apparatus for recovering waste urea and urea dust as claimed in claim 1, wherein: the liquid suction pipe (15) is provided with a filter (8), and the filter (8) is provided with an exhaust valve (9).

3. The apparatus for recovering waste urea and urea dust according to claim 1 or 2, wherein: the outlet of the waste urea recovery pump (7) is connected with a return pipe (17), and the return pipe (17) extends into the waste urea solution storage tank (1).

4. The apparatus for recovering urea waste and urea dust according to claim 3, wherein: the condensate pipe (5) is communicated with the outlet of the waste urea recovery pump (7).

5. The apparatus of claim 4, wherein the apparatus further comprises: and a valve II (12) and a valve III (13) are arranged on the condensation liquid pipe (5), and the branch hose (3) is connected to a pipeline between the valve II (12) and the valve III (13).

6. The apparatus for recovering waste urea and urea dust as claimed in claim 5, wherein: and a valve IV (14) is arranged on the branch hose (3).

7. The apparatus for recovering waste urea and urea dust as set forth in claim 6, wherein: a waste analysis liquid pipe (6) is arranged outside the condensate pipe (5), and the waste analysis liquid pipe (6) is connected in parallel to a pipeline between the valve II (12) and the valve III (13); and a valve I (11) is arranged on the analysis waste liquid pipe (6).

8. The apparatus of claim 7, wherein the apparatus further comprises: a steam main pipe (4) is arranged above the waste urea solution storage tank (1), a plurality of steam branch pipes (21) are arranged on the steam main pipe (4), and each steam branch pipe (21) penetrates through a top cover (18) and stretches into the waste urea solution storage tank (1).

9. The apparatus for recovering waste urea and urea dust as claimed in claim 8, wherein: and a radar liquid level meter (10) is arranged in the waste urea solution storage tank (1).

10. The apparatus for recycling waste urea and urea dust as claimed in claim 9, wherein: the waste urea solution storage tank (1) is arranged below the ground in the middle of an ammonia water tank and an urine tank of a first floor of a main frame of the urea production device, and the top of the waste urea solution storage tank (1) is higher than the ground.