Device for controlling and reducing accumulation of biuret in equipment and use method thereof
A biuret technology in equipment, applied in the chemical industry, can solve problems such as parking, blocking the lower urine pump, and difficult to decompose, so as to reduce production costs, improve economic benefits, and ensure continuous and stable operation.
Inactive Publication Date: 2015-10-28
ANHUI HUAIHUA
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Problems solved by technology
[0005] Biuret is a solid substance and is not easy to decompose. When the attachment accumulates to a certain extent, it will fall off, blocking the suction port of the lower urine pump, causing the pump to fail to measure, and the evaporation and granulation system to stop
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[0015] Such as figure 1 As shown, the device for controlling and reducing the accumulation of biuret in the equipment of the present invention includes a urine pump 6, an evaporative separator 1, a jet pump 2, a condenser 3 and a condensate storage tank 4 connected in sequence, and the evaporative separator The top outlet port of 1 is connected with the inlet port of the jet pump 2, the outlet port of the jet pump 2 is connected with the inlet port of the condenser 3, and the outlet port of the condenser 3 is connected with the condensate storage tank 4 is connected to the inlet, and the bottom end of the evaporation separator 1 is connected to the urine pump 6; on the outer wall of the top of the evaporation separator 1, five coils of heating coils 5 are arranged, and the heating coils 5 adopt heat preservation Wrapped with asbestos; the heating coil 5 is surrounded by Φ22×2 carbon steel.
[0016] The method for using the device for controlling and reducing the accumulation ...
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The invention discloses a device for controlling and reducing accumulation of biuret in equipment. The device for controlling and reducing the accumulation of the biuret in the equipment comprises a urea solution pump (6), an evaporation separator (1), an injection pump (2), a condenser (3) and a condensate storage tank (4) which are connected with one another in sequence; an outlet end at the top of the evaporation separator (1) is connected with an inlet end of the injection pump (2), an outlet end of the injection pump (2) is connected with an inlet end of the condenser (3), an outlet end of the condenser (3) is connected with an inlet of the condensate storage tank (4), and the bottom end of the evaporation separator (1) is connected with the urea solution pump (6); five circles of heating coils (5) are arranged on the outer wall of the top of the evaporation separator (1), and the heating coils (5) are wrapped with heat retaining asbestos. By means of the device for controlling and reducing the accumulation of the biuret in the equipment, the frequency of non-plan shutdown caused by disengagement of the biuret is effectively avoided, and the continuous and stable operation of a system is guaranteed.
Description
technical field [0001] The invention relates to the field of chemical industry, in particular to a device for controlling and reducing the accumulation of biuret in equipment. Background technique [0002] The evaporation process in the ammonia stripping urea production process in the prior art is to send 85% of the urine after the vacuum pre-concentrator to evaporation for further concentration, and then send it to granulation after the final concentration reaches 99.75%. In the process of the above-mentioned prior art, because the concentration of urine in the vapor phase of the second-stage separator is above 95%, the vacuum reaches an absolute pressure of 0.0034MPa, and the condensation reaction of urine is prone to occur under this condition, and its chemical reaction equation is as follows : [0003] CO(NH 2 ) 2 +CO(NH 2 ) 2 =NH 2 CONH CONH 2 +NH 3 [0004] The second-stage evaporative separator is a cyclone separator, and its gas phase will carry a small amou...
Claims
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IPC IPC(8): B01D1/00B01D1/30C07C273/16
Inventor 张军
Owner ANHUI HUAIHUA