A refrigerator breaking process

Abstract

The application discloses a refrigerator crushing process and relates to the technical field of refrigerator recycling, which comprises the following steps: calculating the concentration of cyclopentane in exhaust gas per minute, inversely deducing the number of refrigerators per minute fed into a crusher under a safe concentration, and setting the number of refrigerators per minute as X; conveying refrigerators less than or equal to X to the crusher for crushing; and discharging the crushed materials after sorting. The application has the effect of improving the safety of waste refrigerator crushing, and the number of refrigerators per minute X is calculated according to the safe concentration M of cyclopentane in exhaust gas per minute, so that the concentration of cyclopentane during the operation of the crusher is always kept below the safe value, and the occurrence of safety accidents is prevented.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of refrigerator recycling, in particular to a refrigerator crushing process. BACKGROUND

[0002] With the increasing number of scrapped refrigerators and freezers, the quantity and types thereof are also increasing, and in order to quickly realize the recycling of resources and get rid of the phenomenon of slow manual disassembly and low yield, a set of refrigerator crushing and sorting production line is needed.

[0003] The waste refrigerator crushing and sorting line used at present contains cyclopentane in the crushed material when the refrigerator is crushed, and the cyclopentane sometimes volatilizes and diffuses into the crushing cavity. In the process of crushing the refrigerator, sparks are inevitably generated. If the concentration of cyclopentane in the crushing cavity reaches a certain concentration, accidents or even explosions will occur, and the safety cannot be guaranteed. SUMMARY

[0004] In order to improve the safety during the crushing of waste refrigerators, the application provides a refrigerator crushing process.

[0005] The refrigerator crushing process provided by the application adopts the following technical scheme:

[0006] A refrigerator crushing process comprises the following steps:

[0007] S1: Calculate the concentration of cyclopentane in exhaust gas per minute, and inversely deduce the number of refrigerators per minute fed into the crusher at a safe concentration, and the number of refrigerators per minute is set as X:

[0008] Calculate the amount of air discharged per minute of the crusher = air discharge amount of the crusher per minute * air density at 40 DEG C * 1000 / air molecular weight,

[0009] Calculate the amount of cyclopentane released per minute of the refrigerator = X * cyclopentane mass of each refrigerator / cyclopentane molecular weight,

[0010] The concentration of cyclopentane in exhaust gas per minute is set as M, and M = the amount of cyclopentane released per minute of the refrigerator / the amount of air discharged per minute is calculated,

[0011] The safe concentration of cyclopentane in exhaust gas per minute is set as M 安 , M 安 is substituted into M to obtain X;

[0012] S2: convey less than or equal to X refrigerators to the crusher for crushing;

[0013] S3: discharge the crushed material after sorting.

[0014] By adopting the above technical scheme, according to the safe concentration M of cyclopentane in exhaust gas per minute 安The refrigerator per minute input number X is calculated, so that the concentration of cyclopentane during the operation of the crusher is always kept below a safety value, safety accidents are prevented, and the purpose of improving the safety of the waste refrigerator during crushing is achieved. The materials after crushing are sorted, and various substances contained in the refrigerator are recycled. Some plastics, iron, copper and precious metals can be reused after recycling, reducing resource waste and environmental pollution.

[0015] Optionally, in the S1, the calculation of the exhaust air volume of the crusher per minute comprises the following steps:

[0016] S11, the refrigerator entering the crusher volume is calculated, and the refrigerator entering the crusher volume = the per minute input number * the refrigerator volume * the refrigerator entering the crusher ratio;

[0017] S12, the cavity ventilation ratio is calculated, and the cavity ventilation ratio is set as K, K = (the crusher cavity volume-the refrigerator entering the crusher volume) / the crusher cavity volume;

[0018] S13, the exhaust air volume of the crusher per minute = the exhaust air volume of the crusher body * the cavity ventilation ratio / 60.

[0019] By adopting the above technical scheme, when the crusher is used for crushing, the exhaust air volume of the crusher per minute is calculated according to the volume and exhaust air volume of the crusher. When the crusher is replaced by different specifications, a new X can be obtained by re-entering the formula, and the feeding rhythm is changed to ensure the safety of the crusher during operation.

[0020] Optionally, in the S1, the feeding interval of the refrigerator is calculated, and the feeding interval of the refrigerator is set as t, t = 60 / X. The refrigerator is fed into the crusher according to t.

[0021] Optionally, the refrigerator entering the crusher ratio parameter is set as 0.6.

[0022] By adopting the above technical scheme, the feeding interval of the refrigerator is calculated, which can ensure that the concentration of cyclopentane during the crushing process is always kept below a safety value, improve the crushing efficiency, thereby reducing the energy consumption of each part, saving resources, and controlling the cost.

[0023] Optionally, in the S1, the safe concentration M of cyclopentane in the exhaust air per minute is calculated 安 The safe concentration M of cyclopentane in the exhaust air per minute 安 = the lower limit concentration of cyclopentane * a safety factor value, and the safety factor value is set as 0.2.

[0024] By adopting the above technical scheme, the safe concentration M of cyclopentane in the exhaust air per minute 安According to the lower limit concentration of cyclopentane, the feeding rhythm is inversely calculated, and the safety factor value of the production safety setting is an additional protection factor set in the production process to ensure safety and reliability, which is usually determined according to various uncertain factors and risks in the production process to ensure safety in the face of unpredictable situations.

[0025] Optionally, in S2, a gas detector is arranged in the crusher to measure the cyclopentane concentration in the crusher in real time.

[0026] By adopting the above technical scheme, the gas detector is set for the staff to measure the cyclopentane concentration in the crusher when crushing the refrigerator in real time. For example, when the ventilation volume of the crusher is reduced due to some unexpected situation and cannot be sensed in time, the working condition of the crusher can be understood through the change of the cyclopentane concentration of the gas detector, and timely treatment is performed to avoid accidents.

[0027] Optionally, in S2, the gas detector is communicated with an alarm, and the alarm setting value is less than or equal to the safe concentration M 安 of cyclopentane in exhaust gas per minute.

[0028] By adopting the above technical scheme, when the gas detector detects that the cyclopentane concentration in the air approaches the safe concentration M 安 of cyclopentane in exhaust gas per minute, an alarm is immediately sounded, and the staff immediately stops the machine, thereby avoiding sparks in the crusher and preventing accidents.

[0029] Optionally, in S3, the sorting sequentially includes air separation, magnetic separation, and eddy current separation.

[0030] Optionally, in S3, the air separation is gravity air separation, and the light foam, plastic, and metal block after crushing are separated by air force and then recycled.

[0031] Optionally, in S3, the metal block after air separation is separated into iron and other metals by magnetic separation and then recycled, and the metal after iron removal is separated into precious metal and the remaining metal by eddy current separation and then recycled.

[0032] By adopting the above technical scheme, the air separation, magnetic separation, and eddy current separation crush and separate various substances contained in the refrigerator, the substances polluting the environment are separated and destroyed, and the remaining part can be treated and then reused in the process production, which can protect the environment and save resources.

[0033] In summary, the present application has at least one of the following beneficial technical effects:

[0034] 1. According to the safe concentration M 安The number of refrigerators put into the crusher per minute X is calculated, so that the concentration of cyclopentane during the operation of the crusher is always kept below a safe value, preventing safety accidents and achieving the purpose of improving the safety of waste refrigerators during crushing. The materials after crushing are sorted to recover various substances contained in the refrigerator. Some plastics, iron, copper and precious metals can be reused after recovery, reducing resource waste and environmental pollution.

[0035] 2. Set the gas detector to enable the staff to determine the cyclopentane concentration in the crusher during the crushing of the refrigerator in real time. For example, when the ventilation volume of the crusher is reduced due to some unexpected situation and cannot be sensed in time, the cyclopentane concentration change of the gas detector can be used to understand the working condition of the crusher, and timely treatment can be performed to avoid accidents.

[0036] 3. When the gas detector detects that the cyclopentane concentration in the air is close to the safe concentration M of cyclopentane in the exhaust gas per minute, 安 an alarm is immediately sounded, and the staff immediately stops the machine, thereby avoiding sparks in the crusher and preventing accidents. DETAILED DESCRIPTION

[0037] The application discloses a refrigerator crushing process.

[0038] A refrigerator crushing process, comprising the following steps:

[0039] Conventional parameters

[0040] Air molecular weight (g / mol) = 28.8;

[0041] Air density at 40℃ (Kg / m³) = 1.128;

[0042] Cyclopentane molecular weight (g / mol) = 70.13;

[0043] Lower limit concentration of cyclopentane (amount of substance concentration) = 1.10%.

[0044] Measured parameters

[0045] The cavity volume of the crusher (m³) is set as A, A = 0.46;

[0046] The volume of the refrigerator (m³) is set as B, B = 0.4285;

[0047] The exhaust volume of the crusher body (m³ / h) is set as C, C = 8460;

[0048] The mass of cyclopentane per refrigerator (g) is set as D, D = 300.

[0049] S1: Calculate the concentration of cyclopentane in the exhaust gas per minute, and inversely calculate the number of refrigerators put into the crusher per minute under the safe concentration. The number of refrigerators put into the crusher per minute is set as X.

[0050] S11, calculate the refrigerator into the crusher volume (m³), the refrigerator into the crusher volume (m³) = the number of input per minute * the refrigerator volume * the refrigerator into the crusher ratio; the refrigerator into the crusher ratio parameter is set to 0.6, the refrigerator into the crusher volume (m³) = BX * 0.6;

[0051] S12, calculate the cavity air permeability ratio, the cavity air permeability ratio is set to K, K = (the crusher cavity volume - the refrigerator into the crusher volume) / the crusher cavity volume A, K = (A - 0.6BX) / A;

[0052] S13, the crusher per minute exhaust volume = the crusher body exhaust volume * the cavity air permeability ratio / 60 = CK / 60, calculate the amount of air discharged per minute (mol / min) = the crusher per minute exhaust volume (m³) * 40℃ air density (Kg / m³) * 1000 / air molecular weight (g / mol) = 0.653CK,

[0053] Calculate the amount of cyclopentane released per minute by the refrigerator (mol / min) = X * the cyclopentane mass of each refrigerator (g / min) / the cyclopentane molecular weight (g / mol) = XD / 70.13,

[0054] The concentration of cyclopentane in the exhaust gas per minute is set to M, and M = the amount of cyclopentane released per minute by the refrigerator / the amount of air discharged per minute,

[0055] The safe concentration of cyclopentane in the exhaust gas per minute is set to M 安 , M 安 is substituted into M to calculate X; the safe concentration of cyclopentane in the exhaust gas per minute M 安 = the lower limit concentration of cyclopentane * the safety factor value, the safety factor value is set to 0.2, the safe concentration of cyclopentane in the exhaust gas per minute M 安 = 1.10% * 0.2 = 0.22%.

[0056] Substitute the formulas and simplify M = 0.021783XD / CK, X = 1.09887 ≈ 1.10.

[0057] S2: transmit less than or equal to X refrigerators to the crusher for crushing;

[0058] Calculate the input interval of the refrigerator, the input interval of the refrigerator is set to t, t = 60 / X, according to t, put the refrigerator into the crusher, substitute the above X, t = 60 / 1.10 = 54.55 seconds, that is, it can be set to input a refrigerator every 55 seconds for crushing, while ensuring efficiency, the concentration of cyclopentane in the exhaust gas during the control of the crusher is always maintained below the safe value.

[0059] Substitute t=55s into the formula, X=1.10, M=0.21%<M 安 =0.22%, so the actual concentration of cyclopentane in exhaust gas per minute is less than the safe concentration of cyclopentane in exhaust gas per minute M 安 , ensuring the safety of production.

[0060] The crusher is provided with a gas detector for real-time determination of the cyclopentane concentration in the crusher, the gas detector is connected with an alarm, and the alarm set value is less than or equal to the safe concentration of cyclopentane in exhaust gas per minute M 安 , that is, when the cyclopentane concentration in the crusher reaches 0.22%, the alarm will issue a warning, and the staff will immediately handle it to avoid accidents.

[0061] S3: The crushed material is discharged after being sorted.

[0062] The sorting includes, in sequence, air separation, magnetic separation, and eddy current separation, the air separation is gravity air separation, the crushed material is fed into a gravity air separator by a vibrating feeder, and the light foam, plastic, and metal block after crushing are separated by air force and discharged for recycling, the recycled metal block after air separation is fed into a magnetic separator by a vibrating feeder, and the iron and other metals such as copper and aluminum are separated and discharged for recycling, then the metal block after iron removal is separated by eddy current separation to separate the remaining metal from the valuable metal and the remaining metal for recycling, and the recycled metal can be reused after treatment.

[0063] The implementation principle of the refrigerator crushing process in the embodiment of the application is as follows: the safe concentration of cyclopentane in exhaust gas per minute M 安 is calculated to calculate the refrigerator input number X per minute, so that the concentration of cyclopentane during the operation of the crusher is always kept below the safety value, preventing safety accidents and achieving the purpose of improving the safety of waste refrigerator crushing, and the crushed material is sorted to recycle the substances contained in the refrigerator, some plastics, iron, copper, and precious metals can be reused after recycling, reducing resource waste and environmental pollution.

[0064] The above are preferred embodiments of the application, and do not limit the protection scope of the application, so: any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A refrigerator breaking process, characterized by: The method comprises the following steps: S1: calculate the concentration of cyclopentane in exhaust gas per minute, and inversely calculate the number of refrigerators put into the crusher per minute under the safe concentration, and the number of refrigerators put into the crusher per minute is set as X: Calculate the amount of air discharged by the crusher per minute = the exhaust volume of the crusher per minute * the air density at 40°C * 1000 / the molecular weight of air, The calculation of the exhaust volume of the crusher per minute comprises the following steps: S11: calculate the refrigerator entering the crusher volume, and the refrigerator entering the crusher volume = the number of refrigerators put in per minute * the refrigerator volume * the refrigerator entering the crusher ratio; S12: calculate the cavity air permeability ratio, and the cavity air permeability ratio is set as K, K = (the cavity volume of the crusher - the refrigerator entering the crusher volume) / the cavity volume of the crusher; S13: the exhaust volume of the crusher per minute = the exhaust volume of the crusher body * the cavity air permeability ratio / 60; Calculate the amount of cyclopentane released by the refrigerator per minute = X * the mass of cyclopentane of each refrigerator / the molecular weight of cyclopentane, The concentration of cyclopentane in exhaust gas per minute is set as M, and M = the amount of cyclopentane released by the refrigerator per minute / the amount of air discharged per minute, The safe concentration of cyclopentane in the exhaust gas per minute is set as M 安 , M 安 is substituted into M to calculate X; S2: convey less than or equal to X refrigerators to the crusher for crushing; S3: discharge the crushed materials after sorting.

2. A refrigerator crushing process according to claim 1, characterized in that In the S1, the interval of putting in the refrigerator is calculated, and the interval of putting in the refrigerator is set as t, t = 60 / X, and the refrigerator is put into the crusher according to t.

3. A refrigerator crushing process according to claim 1, characterized in that: The refrigerator entering the crusher ratio parameter is set as 0.

6.

4. A refrigerator crushing process according to claim 1, characterized in that: In the S1, the safe concentration M of cyclopentane in exhaust gas per minute is calculated 安 the safe concentration M of cyclopentane in exhaust gas per minute 安 = lower limit concentration of cyclopentane * safety factor value, the safety factor value is set to 0.

2.

5. A refrigerator crushing process according to claim 4, characterized in that: In the S2, a gas detector for measuring the concentration of cyclopentane in the crusher in real time is arranged in the crusher.

6. A refrigerator crushing process according to claim 5, characterized in that: In the S2, the gas detector is communicated with an alarm, and the alarm is set to be less than or equal to the safe concentration of the cyclopentane in the exhaust gas per minute, that is, M 安 .

7. A refrigerator crushing process according to claim 1, characterized in that: In the S3, the sorting comprises, in sequence, air selection, magnetic separation and eddy current separation.

8. A refrigerator crushing process according to claim 7, characterized in that: In the S3, the air selection is gravity air selection, and the light foam, plastic and metal block after crushing are sorted by air force and then recycled respectively.

9. A refrigerator crushing process according to claim 8, characterized in that: In the S3, the metal block after air selection is separated into iron and other metals by magnetic separation and then recycled, and then the metal after iron removal is separated into precious metal and other metal by eddy current separation and then recycled.