System for conveniently cleaning carbon deposit in methane chloride chilling tower

Abstract

The utility model discloses a system for conveniently cleaning carbon deposits in a methane chloride chilling tower, and relates to the technical field of methane chloride production. According to the technical scheme, a tower bottom discharging port of a chilling tower is connected with a circulating filtering pipeline, a first circulating pump is installed on the circulating filtering pipeline, a first pump front filter is arranged at the position, located at the inlet end of the first circulating pump, of the circulating filtering pipeline, and a first precise filter is arranged at the position, located at the outlet end of the first circulating pump, of the circulating filtering pipeline; differential pressure gauges are connected to the two ends, located at the first precision filter, of the circulating filtering pipeline, and the first circulating pump and the differential pressure gauges are electrically connected with the control system. The pre-pumping filter I and the precision filter I are additionally arranged at the bottom of the chilling tower, materials enter the pre-pumping filter I and the precision filter I in sequence to be filtered, and then the materials are pumped back into the chilling tower, so that carbon deposits in the materials are filtered and cleaned on line, the cleanliness of the materials is guaranteed, and the service life of the materials is prolonged. And the problem that carbon is adhered to the inner wall of the chilling tower and is difficult to clean is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the production technology field of methane chloride, specifically relates to a system of conveniently cleaning carbon deposition in methane chloride quench tower. BACKGROUND

[0002] The preparation of methane chloride from methyl chloride and chlorine is the mainstream technology for preparing methane chloride at present, and the thermal chlorination reaction of methyl chloride and chlorine is carried out in a chlorination reactor, a large amount of heat is released during the reaction process, and the reaction discharge temperature is high. The reaction discharge mainly contains hydrogen chloride, unreacted methyl chloride, dichloromethane, trichloromethane and carbon tetrachloride. In order to improve the utilization rate of methyl chloride, it is necessary to separate methyl chloride from the reaction discharge and re-enter the reaction. First, the boiling point of hydrogen chloride is used to deeply cool the reaction discharge, and hydrogen chloride gas and crude methane chloride liquid are separated by gas-liquid separation. The crude methane chloride liquid enters the recycling tower for rectification, so as to separate methyl chloride from dichloromethane and other substances.

[0003] The thermal chlorination reaction temperature of methyl chloride and chlorine is about 410 DEG C, so the pipeline temperature from the chlorination reactor to the quench tower is relatively high. In the production process, methyl chloride, dichloromethane and other substances are prone to carbon deposition, and the carbon deposition enters the quench tower with the material and adheres to the inner wall of the quench tower. If it is not cleaned in time, it will block the pipeline and affect the production. At present, the quench tower is usually cleaned regularly, but the carbon deposition is difficult to clean, and it needs to be heated by steam before it can be cleaned down, which is complicated, time-consuming and laborious. And dichloromethane and trichloromethane in the material are highly hazardous media, which also increases the risk of poisoning of the cleaning personnel. UTILITY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide a system for conveniently cleaning carbon deposition in a methane chloride quench tower. A pump pre-filter one and a precision filter one are added at the bottom of the quench tower, so that the material at the bottom of the quench tower can be filtered in the pump pre-filter one and the precision filter one in sequence, and the filtered material is returned to the quench tower, so as to realize online filtering and cleaning of carbon deposition in the material, ensure the cleanliness of the material, and avoid the problem that carbon deposition adheres to the inner wall of the quench tower and is difficult to clean.

[0005] The technical scheme of the utility model is as follows:

[0006] The system for conveniently cleaning carbon deposition in a methane chloride quench tower, a circulating filtration pipeline is connected to a tower bottom discharge port of the quench tower, a circulating pump one is installed on the circulating filtration pipeline, a pre-pump filter one is arranged on the circulating filtration pipeline at an inlet end of the circulating pump one, a precision filter one is arranged on the circulating filtration pipeline at an outlet end of the circulating pump one, differential pressure gauges are connected to both ends of the precision filter one, and the circulating pump one and the differential pressure gauges are electrically connected to a control system.

[0007] Preferably, the quench tower kettle is provided with a liquid level meter, a flow meter and an adjusting valve are arranged on the circulating filtration pipeline at the outlet end of the circulating pump one, and the liquid level meter, the flow meter and the adjusting valve are electrically connected to the control system.

[0008] Preferably, a standby circulating filtration pipeline is connected in parallel to both ends of the pre-pump filter one and the circulating pump one, a circulating pump two is installed on the standby circulating filtration pipeline, a pre-pump filter two is arranged on the standby circulating filtration pipeline at an inlet end of the circulating pump two, and the circulating pump two is electrically connected to the control system.

[0009] Preferably, a precision filter two is connected in parallel to both ends of the precision filter one through pipelines, valves are arranged at both ends of the precision filter one and the precision filter two, and the valves are electrically connected to the control system.

[0010] Preferably, a sight glass is arranged on the circulating filtration pipeline at the tower bottom discharge port of the quench tower.

[0011] Preferably, the quench tower is provided with a temperature sensor, and the temperature sensor is electrically connected to the control system.

[0012] Preferably, the quench tower is provided with a pressure sensor, and the pressure sensor is electrically connected to the control system.

[0013] Compared with the prior art, the system for conveniently cleaning carbon deposition in a methane chloride quench tower has the following beneficial effects:

[0014] The system for conveniently cleaning carbon deposition in a methane chloride quench tower of the utility model, by increasing the pre-pump filter one and the precision filter one at the bottom of the quench tower, the material at the bottom of the quench tower can be filtered in the pre-pump filter one and the precision filter one in turn, and the filtered material is punched back into the quench tower, so that the on-line filtering and cleaning of carbon deposition in the material are realized, the cleanliness of the material is ensured, and the problem that carbon deposition is adhered to the inner wall of the quench tower and is difficult to clean is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structure schematic view of the system for conveniently cleaning carbon deposition in a methane chloride quench tower of the utility model.

[0016] In the figure, 1, quench tower; 2, circulating filter pipeline; 3, circulating pump one; 4, pre-pump filter one; 5, precision filter one; 6, differential pressure gauge; 7, liquid level meter; 8, flow meter; 9, regulating valve; 10, standby circulating filter pipeline; 11, circulating pump two; 12, pre-pump filter two; 13, precision filter two; 14, valve; 15, sight glass; 16, temperature sensor; 17, pressure sensor. DETAILED DESCRIPTION

[0017] In order to make the person skilled in the art better understand the technical scheme in the utility model, the technical scheme of the utility model will be clearly and completely described below in combination with the embodiments of the utility model.

[0018] Embodiment 1

[0019] As shown in the figure, the embodiment provides a system for conveniently cleaning carbon deposition in a methane chlorinated quench tower, a circulating filter pipeline 2 is connected to a tower bottom discharge port of the quench tower 1, a circulating pump one 3 is installed on the circulating filter pipeline 2, a pre-pump filter one 4 is arranged on the circulating filter pipeline 2 at an inlet end of the circulating pump one 3, a precision filter one 5 is arranged on the circulating filter pipeline 2 at an outlet end of the circulating pump one 3, differential pressure gauges 6 are connected to both ends of the precision filter one 5 on the circulating filter pipeline 2, and the circulating pump one 3 and the differential pressure gauges 6 are electrically connected to a control system respectively. Figure 1 The tower bottom material of the quench tower 1 enters the pre-pump filter one 4 through the circulating filter pipeline 2, the preliminarily filtered material is punched back into the quench tower 1 by the circulating pump one 3, and before this, the material is further filtered by the precision filter one 5, so that the carbon deposition entrained by the material in the quench tower 1 is filtered out, the carbon deposition adhered to the inner wall of the quench tower 1 is greatly reduced, the pipeline is prevented from being blocked, and the normal production is ensured. Meanwhile, a high differential pressure limit value of the differential pressure gauges 6 can be preset in the control system, an alarm is given when the differential pressure of both ends of the precision filter one 5 exceeds the high differential pressure limit value, and it is indicated that the filter element of the precision filter one 5 needs to be replaced.

[0020] The embodiment can perform on-line circulating filtration and cleaning of the tower bottom material of the quench tower 1, ensure that the material in the quench tower 1 is clean, and the filter element can be replaced according to the alarm of the high differential pressure limit value of the differential pressure gauges 6 of both ends of the precision filter one 5, the precision filter one 5 is prevented from being blocked, and the smooth filtration is ensured.

[0021] Embodiment 2

[0022] On the basis of embodiment 1, as shown in the figure, the embodiment provides a system for conveniently cleaning carbon deposition in a methane chlorinated quench tower, a circulating filter pipeline 2 is connected to a tower bottom discharge port of the quench tower 1, a circulating pump one 3 is installed on the circulating filter pipeline 2, a pre-pump filter one 4 is arranged on the circulating filter pipeline 2 at an inlet end of the circulating pump one 3, a precision filter one 5 is arranged on the circulating filter pipeline 2 at an outlet end of the circulating pump one 3, differential pressure gauges 6 are connected to both ends of the precision filter one 5 on the circulating filter pipeline 2, and the circulating pump one 3 and the differential pressure gauges 6 are electrically connected to a control system respectively.

[0023] Figure 1 ​As shown, the quench tower 1 is provided with a liquid level meter 7, and the circulating filter pipeline 2 is provided with a flow meter 8 and an adjusting valve 9 at the outlet end of the circulating pump 1, and the liquid level meter 7, the flow meter 8 and the adjusting valve 9 are electrically connected with the control system. The low limit value and the high limit value of the liquid level of the quench tower 1 can be preset in the control system. When the liquid level meter 7 detects that the liquid level of the quench tower 1 is lower than the low limit value, it indicates that the amount of the material at the bottom of the quench tower 1 is too small, and at this time, continuing to circulate and filter through the circulating pump 1 will cause the circulating pump 1 to idle and other problems, which is not conducive to the protection of the equipment. Therefore, the control system can control the circulating pump 1 to be closed to stop the circulation and filtration of the material at the bottom of the quench tower 1, or the opening of the adjusting valve 9 can be adjusted to reduce the flow of the material in the circulating filter pipeline 2, until the liquid level of the quench tower 1 reaches the high limit value, which indicates that the liquid level of the quench tower 1 is stable, and at this time, the opening of the adjusting valve 9 can be restored to increase the flow of the material in the circulating filter pipeline 2.

[0024] Example 3

[0025] Based on example 1, as shown in the figure, Figure 1 The pre-pump filter 4 and the two ends of the circulating pump 1 are connected in parallel with a standby circulating filter pipeline 10, the standby circulating filter pipeline 10 is provided with a circulating pump 11, and the pre-pump filter 2 is installed on the standby circulating filter pipeline 10 at the inlet end of the circulating pump 11; the two ends of the precision filter 1 are connected in parallel with a precision filter 13 through a pipeline, and the two ends of the precision filter 1 and the precision filter 13 are respectively provided with a valve 14, and the circulating pump 11 and the valve 14 are electrically connected with the control system.

[0026] The two pre-pump filters and the precision filters are one active and one standby, which can ensure that when one of the pre-pump filters or the precision filters is replaced or repaired, it can be switched to the other standby pre-pump filter or precision filter to ensure the continuous filtration of the material.

[0027] Example 4

[0028] Based on example 1, as shown in the figure, Figure 1 The circulating filter pipeline 2 is provided with a sight glass 15 at the outlet of the quench tower 1, which can facilitate the observation of the turbidity of the material in the circulating filter pipeline 2; the quench tower 1 is provided with a temperature sensor 16 and a pressure sensor 17, and the temperature sensor 16 and the pressure sensor 17 are electrically connected with the control system, and through the temperature sensor 16 and the pressure sensor 17, the temperature and the pressure in the quench tower 1 can be monitored in real time.

Claims

1. A system for facilitating the cleaning of carbon deposits from a quench tower for the production of methane chlorides, characterized in that The circulating filter pipeline (2) is connected with the bottom discharge port of the quenching tower (1), a circulating pump one (3) is installed on the circulating filter pipeline (2), a pump front filter one (4) is arranged at the inlet end of the circulating pump one (3) on the circulating filter pipeline (2), a precision filter one (5) is arranged at the outlet end of the circulating pump one (3) on the circulating filter pipeline (2), differential pressure gauges (6) are connected with both ends of the precision filter one (5) on the circulating filter pipeline (2), and the circulating pump one (3) and the differential pressure gauges (6) are electrically connected with the control system.

2. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides according to claim 1, wherein, The quenching tower (1) is provided with a liquid level meter (7), a flow meter (8) and an adjusting valve (9) are arranged at the outlet end of the circulating pump one (3) on the circulating filter pipeline (2), and the liquid level meter (7), the flow meter (8) and the adjusting valve (9) are electrically connected with the control system.

3. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides of claim 1, wherein, The pump front filter one (4) and the circulating pump one (3) are connected in parallel with a standby circulating filter pipeline (10), a circulating pump two (11) is installed on the standby circulating filter pipeline (10), a pump front filter two (12) is arranged at the inlet end of the circulating pump two (11) on the standby circulating filter pipeline (10), and the circulating pump two (11) is electrically connected with the control system.

4. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides of claim 1, wherein, The precision filter one (5) is connected in parallel with a precision filter two (13) through pipelines at both ends, valve doors (14) are arranged at both ends of the precision filter one (5) and the precision filter two (13) respectively, and the valve doors (14) are electrically connected with the control system.

5. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides of claim 1, wherein, A sight glass (15) is arranged at the bottom discharge port of the quenching tower (1) on the circulating filter pipeline (2).

6. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides of claim 1, wherein, The quenching tower (1) is provided with a temperature sensor (16), and the temperature sensor (16) is electrically connected with the control system.

7. The system for facilitating cleaning of carbon deposits from a quench tower for the production of methane chlorides of claim 1, wherein, The quenching tower (1) is provided with a pressure sensor (17), and the pressure sensor (17) is electrically connected with the control system.

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