CN-224221335-U - Novel urea hydrolysis system capable of preventing liquid level fluctuation

Abstract

The utility model relates to the technical field of urea hydrolysis, and discloses a novel urea hydrolysis system for preventing liquid level fluctuation, which comprises a urea inlet valve and a hydrolyzer, wherein one side of the urea inlet valve is connected with a urea inlet pipe, the other side of the urea inlet valve is connected with a solution coil pipe, and under the two-layer distributed heating effect of the heating coil, uniform heating is completed, the acting area of the heating coil of the hydrolyzer is effectively increased, the urea solution can be uniformly heated, local overtemperature is prevented, severe fluctuation of the urea solution liquid level caused by factors such as abrupt temperature change is prevented, meanwhile, the drainage of the heating coil is introduced into the urea preheater, the utilization value of the drainage heat and the water quantity of the hydrolyzer can be greatly improved, and double waste of the drainage heat and the water quantity is avoided.

Inventors

• CHEN LEI
• JIN JING

Assignees

• 华电潍坊发电有限公司

Dates

Publication Date

20260512

Application Date

20250429

Claims (6)

1. 1. The novel urea hydrolysis system capable of preventing liquid level fluctuation comprises a urea inlet valve (1) and a hydrolyzer (16), and is characterized in that one side of the urea inlet valve (1) is connected with a urea inlet pipe (2), the other side of the urea inlet valve (1) is connected with a solution coil pipe (3), a urea preheater (4) is arranged outside the solution coil pipe (3), a preheating outlet valve (5) is connected above the right side of the urea preheater (4), an overflow pipe (17) is connected to the right side of the preheating outlet valve (5), a hydrolyzer inlet valve (6) is connected above the solution coil pipe (3), a hydrolyzer regulating valve (7) is connected in front of the hydrolyzer inlet valve (6), and a solution injection pipe (8) is arranged at the front end of the hydrolyzer regulating valve (7); The hydrolyzer (16) is positioned on the upper side of the outside of the solution injection pipe (8), a heating coil pipe (9) is arranged on the lower side of the inside of the hydrolyzer (16), a steam inlet regulating valve (14) is arranged on one side above the heating coil pipe (9), a steam inlet valve (13) is connected to the other side of the steam inlet regulating valve (14), and a drain outlet valve (15) is arranged on one side below the heating coil pipe (9); The middle part of the inner side of the hydrolyzer (16) is provided with a stirring blade (10), the left side of the bottom of the hydrolyzer (16) is connected with a solution reflux valve (11), and the front end of the solution reflux valve (11) is connected with a solution reflux regulating valve (12).
2. 2. A novel urea hydrolysis system for preventing liquid level fluctuation according to claim 1, wherein the urea inlet pipe (2) is communicated with the solution injection pipe (8) through a urea inlet valve (1), a solution coil pipe (3), a hydrolyzer inlet valve (6) and a hydrolyzer regulating valve (7), the steam inlet valve (13) is communicated with a steam inlet regulating valve (14) and a heating coil pipe (9), and the heating coil pipe (9) is communicated with the urea preheater (4) through a hydrophobic outlet valve (15).
3. 3. The novel urea hydrolysis system for preventing liquid level fluctuation according to claim 1, wherein the solution injection pipe (8) comprises an injection branch pipe (801) and an injection hole (802), and the injection hole (802) is formed on the surface of the injection branch pipe (801).
4. 4. The novel urea hydrolysis system for preventing liquid level fluctuation according to claim 1, wherein a rotating motor (18) is arranged in the middle of the upper part of the hydrolyzer (16), the output end of the rotating motor (18) is connected with a rotating screw rod (19), and an upper limit plate (20) is fixed at the upper end of the rotating screw rod (19).
5. 5. The novel urea hydrolysis system for preventing liquid level fluctuation according to claim 4, wherein a sliding sleeve (21) is arranged on the outer surface of the rotating screw (19), a lower limit plate (22) is arranged at the bottom of the rotating screw (19), the rotating motor (18) is rotationally connected with the sliding sleeve (21) and the stirring blade (10) through the rotating screw (19), and the sliding sleeve (21) is in threaded connection with the rotating screw (19).
6. 6. The novel urea hydrolysis system for preventing liquid level fluctuation according to claim 5, wherein connecting springs (23) are arranged on two sides of the inner surface of the sliding sleeve (21), a clamping head (24) is arranged at the front end of each connecting spring (23), an arc-shaped clamping groove (25) is formed in the outer side of each clamping head (24), the clamping head (24) is elastically connected with the sliding sleeve (21) through the connecting springs (23), and the clamping head (24) is clamped with the rotary screw (19) through the arc-shaped clamping grooves (25).

Description

Novel urea hydrolysis system capable of preventing liquid level fluctuation Technical Field The utility model relates to the technical field of urea hydrolysis, in particular to a novel urea hydrolysis system for preventing liquid level fluctuation. Background Urea, also known as urea or carbamide, is a white crystal, odorless, and is easily dissolved in water, ethanol and benzene, and slightly dissolved in diethyl ether or chloroform. Urea is one of the simplest organic compounds, is the main nitrogenous end product of protein metabolism and decomposition in mammals and certain fish, and can be used as fertilizer, animal feed, explosive, glue stabilizer, chemical raw material and the like. Because the urea is contained in human urine, the urea is named, the urea is often treated by a corresponding hydrolysis system during processing, the load change of a thermal power unit of the urea hydrolysis system is large, when the ammonia amount is required to be increased suddenly, the opening of a gas outlet valve of a urea hydrolyzer product is increased, the internal pressure of the hydrolyzer is reduced, and the opening of a steam valve is adjusted according to the pressure, so that the opening of the steam valve is increased, the temperature of the hydrolyzer is increased, and the generation rate of product gas is further accelerated. However, as the hydrolyzer mainly relies on the heating coil at the bottom to heat, under the condition that the heating rate is accelerated, the urea solution in the hydrolyzer is heated unevenly, so that the phenomenon of local overtemperature boiling is caused, the liquid level of the hydrolyzer is caused to fluctuate severely, the adjustment of the urea solution inlet valve is frequently adjusted, and when the false liquid level exceeds the limit value, the situation that the urea solution inlet shutoff valve is frequently closed is also caused. The actual liquid level in the hydrolyzer can be continuously reduced under the condition, particularly when the product gas generation amount is large and the temperature of the urea solution is high, serious adverse effects can be caused on the operation working condition of the hydrolyzer, the urea hydrolyzer which is actually applied at present has only one urea solution inlet, and the urea solution entering the hydrolyzer generally has only about 40 ℃ and has a large temperature difference from about 140 ℃ of the hydrolyzer. When the urea solution with lower temperature encounters the urea solution with higher temperature, the urea solution can be gasified rapidly, the volume is increased rapidly, and the severe fluctuation of the liquid level of the hydrolyzer or the vibration of the hydrolyzer body is caused, so that the existing requirements are not met, and a novel urea hydrolysis system for preventing the liquid level fluctuation is provided. Disclosure of utility model The utility model aims to provide a novel urea hydrolysis system for preventing liquid level fluctuation, which aims to solve the problem that severe adverse effects are caused on the operation working condition of a hydrolyzer due to severe fluctuation of the liquid level of the hydrolyzer or vibration of a hydrolyzer body in the prior art. In order to achieve the aim, the novel urea hydrolysis system capable of preventing liquid level fluctuation comprises a urea inlet valve and a hydrolyzer, wherein one side of the urea inlet valve is connected with a urea inlet pipe, the other side of the urea inlet valve is connected with a solution coil pipe, a urea preheater is arranged outside the solution coil pipe, a preheating outlet valve is connected above the right side of the urea preheater, an overflow pipe is connected to the right side of the preheating outlet valve, a hydrolyzer inlet valve is connected above the solution coil pipe, a hydrolyzer regulating valve is connected in front of the hydrolyzer inlet valve, and a solution injection pipe is arranged at the front end of the hydrolyzer regulating valve; the hydrolyzer is positioned on the upper side of the outer part of the solution injection pipe, a heating coil is arranged on the lower side of the inner part of the hydrolyzer, a steam inlet regulating valve is arranged on one side above the heating coil, a steam inlet valve is connected to the other side of the steam inlet regulating valve, and a drain outlet valve is arranged on one side below the heating coil; The middle part of the inner side of the hydrolyzer is provided with a stirring blade, the left side of the bottom of the hydrolyzer is connected with a solution reflux valve, and the front end of the solution reflux valve is connected with a solution reflux regulating valve. Preferably, the urea inlet pipe is communicated with the solution injection pipe through a urea inlet valve, a solution coil pipe, a hydrolyzer inlet valve and a hydrolyzer regulating valve, the steam inlet valve is communicated with the steam inlet regulating valve and a