RU60499U1 - AUTOMATED DEVICE FOR DRAINING HIGH VISCOUS PRODUCTS FROM THE TANK - Google Patents

Abstract

The utility model relates to devices for draining highly viscous products from containers, for example, railway tanks, using circulation heating systems and can be used at transshipment terminals and tank farms. The utility model solves the problem of increasing the efficiency of the process by saving energy and reducing the duration of the process of draining viscous products. To solve this problem, it is proposed: in the heating circuit with the help of an additional pipeline, select the recirculation circuit, and connect the inlet of the additional pipeline to the pressure pipe behind the heat exchanger, and the outlet to the suction pipe; install a pressure sensor at the pump output, the output of which is connected to a pump speed controller. 1 ill.

Description

The utility model relates to devices for draining highly viscous products from containers, for example, railway tanks, using circulation heating systems and can be used at transshipment terminals and tank farms.

A device for heating and draining fuel oil from railway tanks (RF patent No. 2103212, IPC B 65 D 88/74, publ. 01/27/98), containing a suction pipe, a transfer pump and a pressure pipe with a heat exchanger forming a recirculation line inlet the heat exchanger is connected to the suction pipe bypass pipe with a valve, a vacuum pump is connected to the suction pipe through the valve.

The device does not have nozzles that create the destruction of a cold product, due to low thermal conductivity, heating is delayed and the use of an additional circuit becomes unjustified. The product is drained to bypass the heat exchanger, which requires additional heating of the product in the park and increases the cost of pumping.

A known method of controlling the technological process of draining high-viscosity oil products from railway tanks (RF patent No. 2257327, IPC 65 D 88/74, G 05 D 27/02, publ. 27.07.05, BI No. 21), the device for implementing the method includes a collection unit and data processing, ambient temperature sensor, wind speed sensor, temperature sensor of the outer wall of the tank. On the lower drain device, a lower drain device is installed, containing a telescopic hydraulic monitor with a nozzle head. The circulation circuit includes: drain

pipeline, circulation pump, valve for controlling the flow of the product into the heat exchanger, pressure pipeline.

The disadvantage of this device is its low efficiency. The cold product is heated in the tank by a jet of hot product from a hydraulic monitor. This causes the destruction of the cold product and its partial melting. Fragments of the non-molten product may lead to clogging of the pipes and the cessation of product discharge from the tank. High viscosity of the product does not allow to increase the heating rate, without increasing the risk of clogging of the drain pipe.

A known method of heating and draining highly viscous products from a container and a device for its implementation (RF patent No. 2260552 C1, IPC B 65 G 69/20, B 65 D 88/74, publ. 09/20/2005), containing a suction pipe connected in series, starting a tank filled with a preheated product, a pump, a heat exchanger with pipelines for supplying a product and a coolant, a pressure pipe having two parallel sections in which control valves are equipped with controllable actuators, a device operation control system and a pipeline for draining the heated product from the bottom of the tank, in which a controlled shut-off valve is installed, and the suction pipe is connected to the bottom of the tank, the outlet of one of the parallel sections of the pressure pipe is located near the product mirror in the upper part of the tank, and the output of the second parallel section of the pressure pipe the pipeline is located in the bottom of the tank opposite the entrance to the suction pipe, equipped with a pressure sensor installed in the suction pipe at the inlet to the pump and sensor ohm temperature, installed in the pipeline for supplying the heated product to the heat exchanger, and the outputs of the sensors are connected to the inputs of the control system of the device, the control outputs of which are connected to the actuators of the control valves, the pipeline

for draining the heated product from the tank is connected to the suction pipe before entering the starting tank, and in the suction pipe before connecting it to the pipe for draining the heated product from the tank is installed controlled shut-off valve.

The disadvantage of the described device is its low efficiency due to the energy consumption spent on heating the product, cooling in the starting tank, and the duration of the process of draining the product from the tank.

The utility model solves the problem of increasing the efficiency of the process by saving energy and reducing the duration of the process of draining viscous products.

To solve the problem in a known device for draining highly viscous products from a container, including a device operation control system, a drain pipe with a controlled shut-off valve, and a product heating circuit connected to it, including a suction pipe connected in series to a tank bottom, a pump, a heat exchanger, the pressure pipe, the outlet of which is equipped with nozzles, is located in the bottom of the tank and is equipped with a controllable control valve. The heating circuit is equipped with a pressure sensor at the pump inlet connected to the operation control system and a temperature sensor at the outlet of the heat exchanger. It is proposed to separate the recirculation loop in the heating circuit using an additional pipeline, and connect the inlet of the additional pipeline to the pressure pipe behind the heat exchanger, and enter the outlet into the suction pipe. At the pump outlet, a pressure sensor is installed, the output of which is connected to a pump speed controller, and at the pump inlet, a temperature sensor, the output of which is connected to the control system.

At start-up, the system is filled with hot fuel oil from the tank farm. Cold product is heated in the tank by a jet

hot product from a hydraulic monitor. This causes the destruction of the cold product and its partial melting. Since the product has low thermal conductivity, this reduces the heating time.

The recirculation loop avoids the ingress of unmelted fragments into the drain pipe and pump, this increases the stability of the system and allows to increase the rate of erosion of the frozen product.

The pressure in the pressure pipe is maintained by changing the speed of rotation of the pump, which is carried out by a regulator operating on the pressure sensor installed at the pump outlet.

Draining of the product from the tank begins until the tank is completely heated, this allows to reduce the downtime of the tank and reduce the energy required to heat the entire tank. Since the drain begins before the tank is fully warmed up, this reduces the drain time and increases the efficiency of the system.

The drawing shows a block diagram of a device for draining highly viscous products from a container.

The device contains a direct-acting temperature controller - 1, a product temperature sensor after the heat exchanger - 2; pressure regulator at the pump outlet - 3; pressure regulator sensor at the pump outlet - 4; control unit 5; temperature sensor at the pump inlet - 6; pressure sensor at the pump inlet - 7; heat exchanger - 8; product flow regulator in the recirculation loop - 9; lower drain device - 10; capacity - 11; bottom drain device - 12; telescopic hydraulic monitor - 13; valve - 14; pressure collector - 15; drain pipe - 16; circulation pump - 17; valve supply to the tank farm - 18; ejector - 19.

On the lower drain device 10 of the tank 11, a lower drain device 12 is installed, containing a telescopic hydraulic monitor with a nozzle

a head 13. A telescopic hydraulic monitor 13 is connected through a valve 14 to a pressure manifold 15.

The recirculation circuit includes: a drain pipe 16, an ejector 19, a circulation pump 17, a heat exchanger 8, a pressure header 15, a valve 9 for controlling the flow of product in the circuit.

To regulate the supply of preheated product to the tank farm, valve 18 is used.

The operation of the device is as follows:

Before starting work, the recirculation loop is filled from the tank farm. The pipe 10 of the lower drain 12 is connected to the tank 11. With the valves 14 and 18 closed, the valve 9 opens, the pump 17 is turned on and the circulation begins. The rotation speed of the pump 17 is changed by a regulator 3 supporting the outlet pressure (1.0 MPa), measured by a pressure sensor 4. The valve 1 opens and the flow of heat medium to the heat exchanger 8 begins, the heat exchanger is controlled by the readings of temperature sensor 2.

The product is pumped to the heat exchanger 8 by a pump 17 and then, with the valve 9 open and the valves 14 and 18 closed, the hot product from the heat exchanger 8 is fed to the pump inlet through an ejector 19. After reaching the temperature at the outlet of the heat exchanger 8 of the set value (90 ° C), the valve 14 is opened at a predetermined angle (10%) and the valve 9 is simultaneously closed at the same angle. The hot product from the heat exchanger 8 is fed through the pressure pipe 15 through the hydraulic monitor 13 into the tank 11, where it is mixed with the cold product. A mixture of cold product, taken from the tank 11, and hot, supplied through the valve 9, enters the ejector 19, and then to the inlet of the pump 17. When the temperature at the inlet of the pump exceeds a predetermined value (40 ° C), the opening of the valve 14 increases.

When the temperature at the inlet of the pump falls below a predetermined value (35 ° C), valve 9 opens and valve 14 closes.

If the temperature at the pump inlet is higher than the set value (35 ° C), the amount of product discharged to the park is increased by opening valve 18 until the pressure at the pump inlet is lower than the set value (-0.05 MPa).

Claims (1)

An automated device for draining highly viscous products from a tank, comprising a device control system, a drain pipe with a controlled shut-off valve, and a product heating circuit connected to it, including a suction pipe connected in series to a tank bottom, a pump, a heat exchanger, a pressure pipe, an outlet which is equipped with nozzles, is located in the bottom of the tank and is equipped with a controllable control valve, in addition, the heating circuit is equipped with a pressure sensor at the pump inlet connected to the operation control system and the temperature sensor at the outlet of the heat exchanger, characterized in that a recirculation circuit is distinguished in the heating circuit using an additional pipe, the input of the additional pipe is connected to the pressure pipe behind the heat exchanger, and the output is introduced into the suction pipe in addition, a pressure sensor is installed at the pump outlet, the output of which is connected to a pump speed regulator, and at the pump inlet, a temperature sensor, with one with the control system.